mirror of https://github.com/acidanthera/audk.git
EmbeddedPkg: remove GdbDebugAgent library
The GdbDebugAgent library is unused and unmaintained, and now it turns out it doesn't build with Clang, so let's just get rid of it. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Ard Biesheuvel
parent
5f0b035f10
commit
3bdc111178
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@ -155,9 +155,6 @@
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# 1/123 faster than Stm or Vstm version
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BaseMemoryLib|MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf
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# Uncomment to turn on GDB stub in SEC.
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#DebugAgentLib|EmbeddedPkg/Library/GdbDebugAgent/GdbDebugAgent.inf
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[LibraryClasses.common.PEI_CORE]
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PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
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ReportStatusCodeLib|MdeModulePkg/Library/PeiDxeDebugLibReportStatusCode/PeiDxeDebugLibReportStatusCode.inf
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@ -237,7 +237,6 @@
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EmbeddedPkg/Library/AcpiLib/AcpiLib.inf
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EmbeddedPkg/Library/DebugAgentTimerLibNull/DebugAgentTimerLibNull.inf
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EmbeddedPkg/Library/FdtLib/FdtLib.inf
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EmbeddedPkg/Library/GdbDebugAgent/GdbDebugAgent.inf
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EmbeddedPkg/Library/PrePiHobLib/PrePiHobLib.inf
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EmbeddedPkg/Library/PrePiMemoryAllocationLib/PrePiMemoryAllocationLib.inf
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@ -1,258 +0,0 @@
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#------------------------------------------------------------------------------
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#
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# Use ARMv6 instruction to operate on a single stack
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#
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# Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
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#
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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#------------------------------------------------------------------------------
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/*
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This is the stack constructed by the exception handler (low address to high address)
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# R0 - IFAR is EFI_SYSTEM_CONTEXT for ARM
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Reg Offset
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=== ======
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R0 0x00 # stmfd SP!,{R0-R12}
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R1 0x04
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R2 0x08
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R3 0x0c
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R4 0x10
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R5 0x14
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R6 0x18
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R7 0x1c
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R8 0x20
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R9 0x24
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R10 0x28
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R11 0x2c
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R12 0x30
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SP 0x34 # reserved via adding 0x20 (32) to the SP
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LR 0x38
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PC 0x3c
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CPSR 0x40
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DFSR 0x44
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DFAR 0x48
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IFSR 0x4c
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IFAR 0x50
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LR 0x54 # SVC Link register (we need to restore it)
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LR 0x58 # pushed by srsfd
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CPSR 0x5c
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*/
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GCC_ASM_EXPORT(ExceptionHandlersStart)
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GCC_ASM_EXPORT(ExceptionHandlersEnd)
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GCC_ASM_EXPORT(CommonExceptionEntry)
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GCC_ASM_EXPORT(AsmCommonExceptionEntry)
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GCC_ASM_EXPORT(GdbExceptionHandler)
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.text
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.align 3
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//
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// This code gets copied to the ARM vector table
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// ExceptionHandlersStart - ExceptionHandlersEnd gets copied
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//
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ASM_PFX(ExceptionHandlersStart):
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ASM_PFX(Reset):
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b ASM_PFX(Reset)
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ASM_PFX(UndefinedInstruction):
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b ASM_PFX(UndefinedInstructionEntry)
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ASM_PFX(SoftwareInterrupt):
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b ASM_PFX(SoftwareInterruptEntry)
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ASM_PFX(PrefetchAbort):
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b ASM_PFX(PrefetchAbortEntry)
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ASM_PFX(DataAbort):
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b ASM_PFX(DataAbortEntry)
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ASM_PFX(ReservedException):
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b ASM_PFX(ReservedExceptionEntry)
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ASM_PFX(Irq):
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b ASM_PFX(Irq)
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ASM_PFX(Fiq):
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b ASM_PFX(FiqEntry)
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ASM_PFX(UndefinedInstructionEntry):
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sub LR, LR, #4 @ Only -2 for Thumb, adjust in CommonExceptionEntry
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srsdb #0x13! @ Store return state on SVC stack
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cpsid f,#0x13 @ Switch to SVC for common stack
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stmfd SP!,{LR} @ Store the link register for the current mode
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sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
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stmfd SP!,{R0-R12} @ Store the register state
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mov R0,#1 @ ExceptionType
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ldr R1,ASM_PFX(CommonExceptionEntry)
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bx R1
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ASM_PFX(SoftwareInterruptEntry):
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sub LR, LR, #4 @ Only -2 for Thumb, adjust in CommonExceptionEntry
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srsdb #0x13! @ Store return state on SVC stack
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cpsid f @ We are already in SVC mode
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stmfd SP!,{LR} @ Store the link register for the current mode
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sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
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stmfd SP!,{R0-R12} @ Store the register state
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mov R0,#2 @ ExceptionType
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ldr R1,ASM_PFX(CommonExceptionEntry)
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bx R1
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ASM_PFX(PrefetchAbortEntry):
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sub LR,LR,#4
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srsdb #0x13! @ Store return state on SVC stack
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cpsid f,#0x13 @ Switch to SVC for common stack
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stmfd SP!,{LR} @ Store the link register for the current mode
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sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
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stmfd SP!,{R0-R12} @ Store the register state
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mov R0,#3 @ ExceptionType
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ldr R1,ASM_PFX(CommonExceptionEntry)
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bx R1
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ASM_PFX(DataAbortEntry):
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sub LR,LR,#8
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srsdb #0x13! @ Store return state on SVC stack
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cpsid f,#0x13 @ Switch to SVC for common stack
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stmfd SP!,{LR} @ Store the link register for the current mode
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sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
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stmfd SP!,{R0-R12} @ Store the register state
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mov R0,#4
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ldr R1,ASM_PFX(CommonExceptionEntry)
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bx R1
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ASM_PFX(ReservedExceptionEntry):
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srsdb #0x13! @ Store return state on SVC stack
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cpsid f,#0x13 @ Switch to SVC for common stack
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stmfd SP!,{LR} @ Store the link register for the current mode
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sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
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stmfd SP!,{R0-R12} @ Store the register state
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mov R0,#5
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ldr R1,ASM_PFX(CommonExceptionEntry)
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bx R1
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ASM_PFX(FiqEntry):
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sub LR,LR,#4
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srsdb #0x13! @ Store return state on SVC stack
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cps #0x13 @ Switch to SVC for common stack
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stmfd SP!,{LR} @ Store the link register for the current mode
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sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
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stmfd SP!,{R0-R12} @ Store the register state
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@ Since we have already switch to SVC R8_fiq - R12_fiq
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@ never get used or saved
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mov R0,#7 @ ExceptionType
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ldr R1,ASM_PFX(CommonExceptionEntry)
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bx R1
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//
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// This gets patched by the C code that patches in the vector table
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//
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ASM_PFX(CommonExceptionEntry):
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.byte 0x12
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.byte 0x34
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.byte 0x56
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.byte 0x78
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ASM_PFX(ExceptionHandlersEnd):
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//
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// This code runs from CpuDxe driver loaded address. It is patched into
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// CommonExceptionEntry.
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//
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ASM_PFX(AsmCommonExceptionEntry):
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mrc p15, 0, R1, c6, c0, 2 @ Read IFAR
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str R1, [SP, #0x50] @ Store it in EFI_SYSTEM_CONTEXT_ARM.IFAR
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mrc p15, 0, R1, c5, c0, 1 @ Read IFSR
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str R1, [SP, #0x4c] @ Store it in EFI_SYSTEM_CONTEXT_ARM.IFSR
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mrc p15, 0, R1, c6, c0, 0 @ Read DFAR
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str R1, [SP, #0x48] @ Store it in EFI_SYSTEM_CONTEXT_ARM.DFAR
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mrc p15, 0, R1, c5, c0, 0 @ Read DFSR
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str R1, [SP, #0x44] @ Store it in EFI_SYSTEM_CONTEXT_ARM.DFSR
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ldr R1, [SP, #0x5c] @ srsdb saved pre-exception CPSR on the stack
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str R1, [SP, #0x40] @ Store it in EFI_SYSTEM_CONTEXT_ARM.CPSR
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add R2, SP, #0x38 @ Make R2 point to EFI_SYSTEM_CONTEXT_ARM.LR
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and R3, R1, #0x1f @ Check CPSR to see if User or System Mode
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cmp R3, #0x1f @ if ((CPSR == 0x10) || (CPSR == 0x1df))
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cmpne R3, #0x10 @
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stmeqed R2, {lr}^ @ save unbanked lr
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@ else
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stmneed R2, {lr} @ save SVC lr
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ldr R5, [SP, #0x58] @ PC is the LR pushed by srsfd
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@ Check to see if we have to adjust for Thumb entry
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sub r4, r0, #1 @ if (ExceptionType == 1 || ExceptionType ==2)) {
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cmp r4, #1 @ // UND & SVC have differnt LR adjust for Thumb
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bhi NoAdjustNeeded
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tst r1, #0x20 @ if ((CPSR & T)) == T) { // Thumb Mode on entry
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addne R5, R5, #2 @ PC += 2@
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str R5,[SP,#0x58] @ Update LR value pused by srsfd
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NoAdjustNeeded:
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str R5, [SP, #0x3c] @ Store it in EFI_SYSTEM_CONTEXT_ARM.PC
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sub R1, SP, #0x60 @ We pused 0x60 bytes on the stack
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str R1, [SP, #0x34] @ Store it in EFI_SYSTEM_CONTEXT_ARM.SP
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@ R0 is ExceptionType
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mov R1,SP @ R1 is SystemContext
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/*
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VOID
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EFIAPI
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GdbExceptionHandler (
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IN EFI_EXCEPTION_TYPE ExceptionType, R0
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IN OUT EFI_SYSTEM_CONTEXT SystemContext R1
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)
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*/
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blx ASM_PFX(GdbExceptionHandler) @ Call exception handler
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ldr R1,[SP,#0x3c] @ EFI_SYSTEM_CONTEXT_ARM.PC
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str R1,[SP,#0x58] @ Store it back to srsfd stack slot so it can be restored
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ldr R1,[SP,#0x40] @ EFI_SYSTEM_CONTEXT_ARM.CPSR
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str R1,[SP,#0x5c] @ Store it back to srsfd stack slot so it can be restored
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add R3, SP, #0x54 @ Make R3 point to SVC LR saved on entry
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add R2, SP, #0x38 @ Make R2 point to EFI_SYSTEM_CONTEXT_ARM.LR
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and R1, R1, #0x1f @ Check to see if User or System Mode
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cmp R1, #0x1f @ if ((CPSR == 0x10) || (CPSR == 0x1f))
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cmpne R1, #0x10 @
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ldmeqed R2, {lr}^ @ restore unbanked lr
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@ else
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ldmneed R3, {lr} @ restore SVC lr, via ldmfd SP!, {LR}
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ldmfd SP!,{R0-R12} @ Restore general purpose registers
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@ Exception handler can not change SP
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add SP,SP,#0x20 @ Clear out the remaining stack space
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ldmfd SP!,{LR} @ restore the link register for this context
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rfefd SP! @ return from exception via srsfd stack slot
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@ -1,259 +0,0 @@
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//------------------------------------------------------------------------------
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//
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// Use ARMv6 instruction to operate on a single stack
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//
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// Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
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//
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// This program and the accompanying materials
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// are licensed and made available under the terms and conditions of the BSD License
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// which accompanies this distribution. The full text of the license may be found at
|
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// http://opensource.org/licenses/bsd-license.php
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//
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// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
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// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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//
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//------------------------------------------------------------------------------
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/*
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This is the stack constructed by the exception handler (low address to high address)
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# R0 - IFAR is EFI_SYSTEM_CONTEXT for ARM
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Reg Offset
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=== ======
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R0 0x00 # stmfd SP!,{R0-R12}
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R1 0x04
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R2 0x08
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R3 0x0c
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R4 0x10
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R5 0x14
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R6 0x18
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R7 0x1c
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R8 0x20
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R9 0x24
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R10 0x28
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R11 0x2c
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R12 0x30
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SP 0x34 # reserved via adding 0x20 (32) to the SP
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LR 0x38
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PC 0x3c
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CPSR 0x40
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DFSR 0x44
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DFAR 0x48
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IFSR 0x4c
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IFAR 0x50
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LR 0x54 # SVC Link register (we need to restore it)
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LR 0x58 # pushed by srsfd
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CPSR 0x5c
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*/
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EXPORT ExceptionHandlersStart
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EXPORT ExceptionHandlersEnd
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EXPORT CommonExceptionEntry
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EXPORT AsmCommonExceptionEntry
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IMPORT GdbExceptionHandler
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PRESERVE8
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AREA DxeExceptionHandlers, CODE, READONLY
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//
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// This code gets copied to the ARM vector table
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// ExceptionHandlersStart - ExceptionHandlersEnd gets copied
|
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//
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ExceptionHandlersStart
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Reset
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b Reset
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UndefinedInstruction
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b UndefinedInstructionEntry
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SoftwareInterrupt
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b SoftwareInterruptEntry
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PrefetchAbort
|
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b PrefetchAbortEntry
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DataAbort
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b DataAbortEntry
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ReservedException
|
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b ReservedExceptionEntry
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Irq
|
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b Irq
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|
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Fiq
|
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b FiqEntry
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|
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|
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UndefinedInstructionEntry
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sub LR, LR, #4 ; Only -2 for Thumb, adjust in CommonExceptionEntry
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srsfd #0x13! ; Store return state on SVC stack
|
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cpsid f, #0x13 ; Switch to SVC for common stack
|
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stmfd SP!,{LR} ; Store the link register for the current mode
|
||||
sub SP,SP,#0x20 ; Save space for SP, LR, PC, IFAR - CPSR
|
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stmfd SP!,{R0-R12} ; Store the register state
|
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|
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mov R0,#1 ; ExceptionType
|
||||
ldr R1,CommonExceptionEntry;
|
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bx R1
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|
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SoftwareInterruptEntry
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sub LR, LR, #4 ; Only -2 for Thumb, adjust in CommonExceptionEntry
|
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srsfd #0x13! ; Store return state on SVC stack
|
||||
cpsid f ; We are already in SVC mode
|
||||
stmfd SP!,{LR} ; Store the link register for the current mode
|
||||
sub SP,SP,#0x20 ; Save space for SP, LR, PC, IFAR - CPSR
|
||||
stmfd SP!,{R0-R12} ; Store the register state
|
||||
|
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mov R0,#2 ; ExceptionType
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ldr R1,CommonExceptionEntry
|
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bx R1
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||||
|
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PrefetchAbortEntry
|
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sub LR,LR,#4
|
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srsfd #0x13! ; Store return state on SVC stack
|
||||
cpsid f, #0x13 ; Switch to SVC for common stack
|
||||
stmfd SP!,{LR} ; Store the link register for the current mode
|
||||
sub SP,SP,#0x20 ; Save space for SP, LR, PC, IFAR - CPSR
|
||||
stmfd SP!,{R0-R12} ; Store the register state
|
||||
|
||||
mov R0,#3 ; ExceptionType
|
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ldr R1,CommonExceptionEntry
|
||||
bx R1
|
||||
|
||||
DataAbortEntry
|
||||
sub LR,LR,#8
|
||||
srsfd #0x13! ; Store return state on SVC stack
|
||||
cpsid f, #0x13 ; Switch to SVC for common stack
|
||||
stmfd SP!,{LR} ; Store the link register for the current mode
|
||||
sub SP,SP,#0x20 ; Save space for SP, LR, PC, IFAR - CPSR
|
||||
stmfd SP!,{R0-R12} ; Store the register state
|
||||
|
||||
mov R0,#4 ; ExceptionType
|
||||
ldr R1,CommonExceptionEntry
|
||||
bx R1
|
||||
|
||||
ReservedExceptionEntry
|
||||
srsfd #0x13! ; Store return state on SVC stack
|
||||
cpsid f, #0x13 ; Switch to SVC for common stack
|
||||
stmfd SP!,{LR} ; Store the link register for the current mode
|
||||
sub SP,SP,#0x20 ; Save space for SP, LR, PC, IFAR - CPSR
|
||||
stmfd SP!,{R0-R12} ; Store the register state
|
||||
|
||||
mov R0,#5 ; ExceptionType
|
||||
ldr R1,CommonExceptionEntry
|
||||
bx R1
|
||||
|
||||
FiqEntry
|
||||
sub LR,LR,#4
|
||||
srsfd #0x13! ; Store return state on SVC stack
|
||||
cps #0x13 ; Switch to SVC for common stack
|
||||
stmfd SP!,{LR} ; Store the link register for the current mode
|
||||
sub SP,SP,#0x20 ; Save space for SP, LR, PC, IFAR - CPSR
|
||||
stmfd SP!,{R0-R12} ; Store the register state
|
||||
; Since we have already switch to SVC R8_fiq - R12_fiq
|
||||
; never get used or saved
|
||||
mov R0,#7 ; ExceptionType
|
||||
ldr R1,CommonExceptionEntry
|
||||
bx R1
|
||||
|
||||
//
|
||||
// This gets patched by the C code that patches in the vector table
|
||||
//
|
||||
CommonExceptionEntry
|
||||
dcd 0x12345678
|
||||
|
||||
ExceptionHandlersEnd
|
||||
|
||||
//
|
||||
// This code runs from CpuDxe driver loaded address. It is patched into
|
||||
// CommonExceptionEntry.
|
||||
//
|
||||
AsmCommonExceptionEntry
|
||||
mrc p15, 0, R1, c6, c0, 2 ; Read IFAR
|
||||
str R1, [SP, #0x50] ; Store it in EFI_SYSTEM_CONTEXT_ARM.IFAR
|
||||
|
||||
mrc p15, 0, R1, c5, c0, 1 ; Read IFSR
|
||||
str R1, [SP, #0x4c] ; Store it in EFI_SYSTEM_CONTEXT_ARM.IFSR
|
||||
|
||||
mrc p15, 0, R1, c6, c0, 0 ; Read DFAR
|
||||
str R1, [SP, #0x48] ; Store it in EFI_SYSTEM_CONTEXT_ARM.DFAR
|
||||
|
||||
mrc p15, 0, R1, c5, c0, 0 ; Read DFSR
|
||||
str R1, [SP, #0x44] ; Store it in EFI_SYSTEM_CONTEXT_ARM.DFSR
|
||||
|
||||
ldr R1, [SP, #0x5c] ; srsfd saved pre-exception CPSR on the stack
|
||||
str R1, [SP, #0x40] ; Store it in EFI_SYSTEM_CONTEXT_ARM.CPSR
|
||||
|
||||
add R2, SP, #0x38 ; Make R2 point to EFI_SYSTEM_CONTEXT_ARM.LR
|
||||
and R3, R1, #0x1f ; Check CPSR to see if User or System Mode
|
||||
cmp R3, #0x1f ; if ((CPSR == 0x10) || (CPSR == 0x1df))
|
||||
cmpne R3, #0x10 ;
|
||||
stmeqed R2, {lr}^ ; save unbanked lr
|
||||
; else
|
||||
stmneed R2, {lr} ; save SVC lr
|
||||
|
||||
|
||||
ldr R5, [SP, #0x58] ; PC is the LR pushed by srsfd
|
||||
; Check to see if we have to adjust for Thumb entry
|
||||
sub r4, r0, #1 ; if (ExceptionType == 1 || ExceptionType ==2)) {
|
||||
cmp r4, #1 ; // UND & SVC have differnt LR adjust for Thumb
|
||||
bhi NoAdjustNeeded
|
||||
|
||||
tst r1, #0x20 ; if ((CPSR & T)) == T) { // Thumb Mode on entry
|
||||
addne R5, R5, #2 ; PC += 2;
|
||||
str R5,[SP,#0x58] ; Update LR value pused by srsfd
|
||||
|
||||
NoAdjustNeeded
|
||||
|
||||
str R5, [SP, #0x3c] ; Store it in EFI_SYSTEM_CONTEXT_ARM.PC
|
||||
|
||||
sub R1, SP, #0x60 ; We pused 0x60 bytes on the stack
|
||||
str R1, [SP, #0x34] ; Store it in EFI_SYSTEM_CONTEXT_ARM.SP
|
||||
|
||||
; R0 is ExceptionType
|
||||
mov R1,SP ; R1 is SystemContext
|
||||
|
||||
/*
|
||||
VOID
|
||||
EFIAPI
|
||||
GdbExceptionHandler (
|
||||
IN EFI_EXCEPTION_TYPE ExceptionType, R0
|
||||
IN OUT EFI_SYSTEM_CONTEXT SystemContext R1
|
||||
)
|
||||
|
||||
*/
|
||||
blx GdbExceptionHandler ; Call exception handler
|
||||
|
||||
ldr R1,[SP,#0x3c] ; EFI_SYSTEM_CONTEXT_ARM.PC
|
||||
str R1,[SP,#0x58] ; Store it back to srsfd stack slot so it can be restored
|
||||
|
||||
ldr R1,[SP,#0x40] ; EFI_SYSTEM_CONTEXT_ARM.CPSR
|
||||
str R1,[SP,#0x5c] ; Store it back to srsfd stack slot so it can be restored
|
||||
|
||||
add R3, SP, #0x54 ; Make R3 point to SVC LR saved on entry
|
||||
add R2, SP, #0x38 ; Make R2 point to EFI_SYSTEM_CONTEXT_ARM.LR
|
||||
and R1, R1, #0x1f ; Check to see if User or System Mode
|
||||
cmp R1, #0x1f ; if ((CPSR == 0x10) || (CPSR == 0x1f))
|
||||
cmpne R1, #0x10 ;
|
||||
ldmeqed R2, {lr}^ ; restore unbanked lr
|
||||
; else
|
||||
ldmneed R3, {lr} ; restore SVC lr, via ldmfd SP!, {LR}
|
||||
|
||||
ldmfd SP!,{R0-R12} ; Restore general purpose registers
|
||||
; Exception handler can not change SP
|
||||
|
||||
add SP,SP,#0x20 ; Clear out the remaining stack space
|
||||
ldmfd SP!,{LR} ; restore the link register for this context
|
||||
rfefd SP! ; return from exception via srsfd stack slot
|
||||
|
||||
END
|
||||
|
||||
|
||||
|
|
@ -1,675 +0,0 @@
|
|||
/** @file
|
||||
Processor specific parts of the GDB stub
|
||||
|
||||
Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
|
||||
|
||||
This program and the accompanying materials
|
||||
are licensed and made available under the terms and conditions of the BSD License
|
||||
which accompanies this distribution. The full text of the license may be found at
|
||||
http://opensource.org/licenses/bsd-license.php
|
||||
|
||||
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
||||
|
||||
**/
|
||||
|
||||
|
||||
#include <GdbDebugAgent.h>
|
||||
#include <Library/PrintLib.h>
|
||||
#include <Library/ArmLib.h>
|
||||
|
||||
//
|
||||
// Externs from the exception handler assembly file
|
||||
//
|
||||
VOID
|
||||
ExceptionHandlersStart (
|
||||
VOID
|
||||
);
|
||||
|
||||
VOID
|
||||
ExceptionHandlersEnd (
|
||||
VOID
|
||||
);
|
||||
|
||||
VOID
|
||||
CommonExceptionEntry (
|
||||
VOID
|
||||
);
|
||||
|
||||
VOID
|
||||
AsmCommonExceptionEntry (
|
||||
VOID
|
||||
);
|
||||
|
||||
|
||||
//
|
||||
// Array of exception types that need to be hooked by the debugger
|
||||
// (efi, gdb) //efi number
|
||||
//
|
||||
EFI_EXCEPTION_TYPE_ENTRY gExceptionType[] = {
|
||||
{ EXCEPT_ARM_SOFTWARE_INTERRUPT, GDB_SIGTRAP },
|
||||
{ EXCEPT_ARM_UNDEFINED_INSTRUCTION, GDB_SIGTRAP },
|
||||
{ EXCEPT_ARM_PREFETCH_ABORT, GDB_SIGTRAP },
|
||||
{ EXCEPT_ARM_DATA_ABORT, GDB_SIGTRAP }, // GDB_SIGEMT
|
||||
{ EXCEPT_ARM_RESERVED, GDB_SIGTRAP }, // GDB_SIGILL
|
||||
{ EXCEPT_ARM_FIQ, GDB_SIGINT } // Used for ctrl-c
|
||||
};
|
||||
|
||||
// Shut up some annoying RVCT warnings
|
||||
#ifdef __CC_ARM
|
||||
#pragma diag_suppress 1296
|
||||
#endif
|
||||
|
||||
UINTN gRegisterOffsets[] = {
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, R0),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, R1),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, R2),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, R3),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, R4),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, R5),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, R6),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, R7),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, R8),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, R9),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, R10),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, R11),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, R12),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, SP),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, LR),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, PC),
|
||||
0x00000F01, // f0
|
||||
0x00000F02,
|
||||
0x00000F03,
|
||||
0x00000F11, // f1
|
||||
0x00000F12,
|
||||
0x00000F13,
|
||||
0x00000F21, // f2
|
||||
0x00000F22,
|
||||
0x00000F23,
|
||||
0x00000F31, // f3
|
||||
0x00000F32,
|
||||
0x00000F33,
|
||||
0x00000F41, // f4
|
||||
0x00000F42,
|
||||
0x00000F43,
|
||||
0x00000F51, // f5
|
||||
0x00000F52,
|
||||
0x00000F53,
|
||||
0x00000F61, // f6
|
||||
0x00000F62,
|
||||
0x00000F63,
|
||||
0x00000F71, // f7
|
||||
0x00000F72,
|
||||
0x00000F73,
|
||||
0x00000FFF, // fps
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_ARM, CPSR)
|
||||
};
|
||||
|
||||
// restore warnings for RVCT
|
||||
#ifdef __CC_ARM
|
||||
#pragma diag_default 1296
|
||||
#endif
|
||||
|
||||
|
||||
/**
|
||||
Return the number of entries in the gExceptionType[]
|
||||
|
||||
@retval UINTN, the number of entries in the gExceptionType[] array.
|
||||
**/
|
||||
UINTN
|
||||
MaxEfiException (
|
||||
VOID
|
||||
)
|
||||
{
|
||||
return sizeof (gExceptionType)/sizeof (EFI_EXCEPTION_TYPE_ENTRY);
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
/**
|
||||
Check to see if the ISA is supported.
|
||||
ISA = Instruction Set Architecture
|
||||
|
||||
@retval TRUE if Isa is supported
|
||||
|
||||
**/
|
||||
BOOLEAN
|
||||
CheckIsa (
|
||||
IN EFI_INSTRUCTION_SET_ARCHITECTURE Isa
|
||||
)
|
||||
{
|
||||
if (Isa == IsaArm) {
|
||||
return TRUE;
|
||||
} else {
|
||||
return FALSE;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
This takes in the register number and the System Context, and returns a pointer to the RegNumber-th register in gdb ordering
|
||||
It is, by default, set to find the register pointer of the ARM member
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param RegNumber The register to which we want to find a pointer
|
||||
@retval the pointer to the RegNumber-th pointer
|
||||
**/
|
||||
UINTN *
|
||||
FindPointerToRegister(
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN RegNumber
|
||||
)
|
||||
{
|
||||
UINT8 *TempPtr;
|
||||
ASSERT(gRegisterOffsets[RegNumber] < 0xF00);
|
||||
TempPtr = ((UINT8 *)SystemContext.SystemContextArm) + gRegisterOffsets[RegNumber];
|
||||
return (UINT32 *)TempPtr;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Adds the RegNumber-th register's value to the output buffer, starting at the given OutBufPtr
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param RegNumber the number of the register that we want to read
|
||||
@param OutBufPtr pointer to the output buffer's end. the new data will be added from this point on.
|
||||
@retval the pointer to the next character of the output buffer that is available to be written on.
|
||||
**/
|
||||
CHAR8 *
|
||||
BasicReadRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN RegNumber,
|
||||
IN CHAR8 *OutBufPtr
|
||||
)
|
||||
{
|
||||
UINTN RegSize;
|
||||
CHAR8 Char;
|
||||
|
||||
if (gRegisterOffsets[RegNumber] > 0xF00) {
|
||||
AsciiSPrint(OutBufPtr, 9, "00000000");
|
||||
OutBufPtr += 8;
|
||||
return OutBufPtr;
|
||||
}
|
||||
|
||||
RegSize = 0;
|
||||
while (RegSize < 32) {
|
||||
Char = mHexToStr[(UINT8)((*FindPointerToRegister(SystemContext, RegNumber) >> (RegSize+4)) & 0xf)];
|
||||
if ((Char >= 'A') && (Char <= 'F')) {
|
||||
Char = Char - 'A' + 'a';
|
||||
}
|
||||
*OutBufPtr++ = Char;
|
||||
|
||||
Char = mHexToStr[(UINT8)((*FindPointerToRegister(SystemContext, RegNumber) >> RegSize) & 0xf)];
|
||||
if ((Char >= 'A') && (Char <= 'F')) {
|
||||
Char = Char - 'A' + 'a';
|
||||
}
|
||||
*OutBufPtr++ = Char;
|
||||
|
||||
RegSize = RegSize + 8;
|
||||
}
|
||||
return OutBufPtr;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Reads the n-th register's value into an output buffer and sends it as a packet
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param InBuffer Pointer to the input buffer received from gdb server
|
||||
**/
|
||||
VOID
|
||||
ReadNthRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *InBuffer
|
||||
)
|
||||
{
|
||||
UINTN RegNumber;
|
||||
CHAR8 OutBuffer[9]; // 1 reg=8 hex chars, and the end '\0' (escape seq)
|
||||
CHAR8 *OutBufPtr; // pointer to the output buffer
|
||||
|
||||
RegNumber = AsciiStrHexToUintn (&InBuffer[1]);
|
||||
|
||||
if (RegNumber >= (sizeof (gRegisterOffsets)/sizeof (UINTN))) {
|
||||
SendError (GDB_EINVALIDREGNUM);
|
||||
return;
|
||||
}
|
||||
|
||||
OutBufPtr = OutBuffer;
|
||||
OutBufPtr = BasicReadRegister (SystemContext, RegNumber, OutBufPtr);
|
||||
|
||||
*OutBufPtr = '\0'; // the end of the buffer
|
||||
SendPacket(OutBuffer);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Reads the general registers into an output buffer and sends it as a packet
|
||||
@param SystemContext Register content at time of the exception
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
ReadGeneralRegisters (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext
|
||||
)
|
||||
{
|
||||
UINTN Index;
|
||||
// a UINT32 takes 8 ascii characters
|
||||
CHAR8 OutBuffer[(sizeof (gRegisterOffsets) * 2) + 1];
|
||||
CHAR8 *OutBufPtr;
|
||||
|
||||
// It is not safe to allocate pool here....
|
||||
OutBufPtr = OutBuffer;
|
||||
for (Index = 0; Index < (sizeof (gRegisterOffsets)/sizeof (UINTN)); Index++) {
|
||||
OutBufPtr = BasicReadRegister (SystemContext, Index, OutBufPtr);
|
||||
}
|
||||
|
||||
*OutBufPtr = '\0';
|
||||
SendPacket(OutBuffer);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Adds the RegNumber-th register's value to the output buffer, starting at the given OutBufPtr
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param RegNumber the number of the register that we want to write
|
||||
@param InBufPtr pointer to the output buffer. the new data will be extracted from the input buffer from this point on.
|
||||
@retval the pointer to the next character of the input buffer that can be used
|
||||
**/
|
||||
CHAR8 *
|
||||
BasicWriteRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN RegNumber,
|
||||
IN CHAR8 *InBufPtr
|
||||
)
|
||||
{
|
||||
UINTN RegSize;
|
||||
UINTN TempValue; // the value transferred from a hex char
|
||||
UINT32 NewValue; // the new value of the RegNumber-th Register
|
||||
|
||||
if (gRegisterOffsets[RegNumber] > 0xF00) {
|
||||
return InBufPtr + 8;
|
||||
}
|
||||
|
||||
NewValue = 0;
|
||||
RegSize = 0;
|
||||
while (RegSize < 32) {
|
||||
TempValue = HexCharToInt(*InBufPtr++);
|
||||
|
||||
if ((INTN)TempValue < 0) {
|
||||
SendError (GDB_EBADMEMDATA);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
NewValue += (TempValue << (RegSize+4));
|
||||
TempValue = HexCharToInt(*InBufPtr++);
|
||||
|
||||
if ((INTN)TempValue < 0) {
|
||||
SendError (GDB_EBADMEMDATA);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
NewValue += (TempValue << RegSize);
|
||||
RegSize = RegSize + 8;
|
||||
}
|
||||
*(FindPointerToRegister(SystemContext, RegNumber)) = NewValue;
|
||||
return InBufPtr;
|
||||
}
|
||||
|
||||
|
||||
/** ‘P n...=r...’
|
||||
Writes the new value of n-th register received into the input buffer to the n-th register
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param InBuffer Ponter to the input buffer received from gdb server
|
||||
**/
|
||||
VOID
|
||||
WriteNthRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *InBuffer
|
||||
)
|
||||
{
|
||||
UINTN RegNumber;
|
||||
CHAR8 RegNumBuffer[MAX_REG_NUM_BUF_SIZE]; // put the 'n..' part of the message into this array
|
||||
CHAR8 *RegNumBufPtr;
|
||||
CHAR8 *InBufPtr; // pointer to the input buffer
|
||||
|
||||
// find the register number to write
|
||||
InBufPtr = &InBuffer[1];
|
||||
RegNumBufPtr = RegNumBuffer;
|
||||
while (*InBufPtr != '=') {
|
||||
*RegNumBufPtr++ = *InBufPtr++;
|
||||
}
|
||||
*RegNumBufPtr = '\0';
|
||||
RegNumber = AsciiStrHexToUintn (RegNumBuffer);
|
||||
|
||||
// check if this is a valid Register Number
|
||||
if (RegNumber >= (sizeof (gRegisterOffsets)/sizeof (UINTN))) {
|
||||
SendError (GDB_EINVALIDREGNUM);
|
||||
return;
|
||||
}
|
||||
InBufPtr++; // skips the '=' character
|
||||
BasicWriteRegister (SystemContext, RegNumber, InBufPtr);
|
||||
SendSuccess();
|
||||
}
|
||||
|
||||
|
||||
/** ‘G XX...’
|
||||
Writes the new values received into the input buffer to the general registers
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param InBuffer Pointer to the input buffer received from gdb server
|
||||
**/
|
||||
|
||||
VOID
|
||||
EFIAPI
|
||||
WriteGeneralRegisters (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *InBuffer
|
||||
)
|
||||
{
|
||||
UINTN i;
|
||||
CHAR8 *InBufPtr; /// pointer to the input buffer
|
||||
UINTN MinLength;
|
||||
UINTN RegisterCount = (sizeof (gRegisterOffsets)/sizeof (UINTN));
|
||||
|
||||
MinLength = (RegisterCount * 8) + 1; // 'G' plus the registers in ASCII format
|
||||
|
||||
if (AsciiStrLen(InBuffer) < MinLength) {
|
||||
//Bad message. Message is not the right length
|
||||
SendError (GDB_EBADBUFSIZE);
|
||||
return;
|
||||
}
|
||||
|
||||
InBufPtr = &InBuffer[1];
|
||||
|
||||
// Read the new values for the registers from the input buffer to an array, NewValueArray.
|
||||
// The values in the array are in the gdb ordering
|
||||
for(i = 0; i < RegisterCount; i++) {
|
||||
InBufPtr = BasicWriteRegister (SystemContext, i, InBufPtr);
|
||||
}
|
||||
|
||||
SendSuccess ();
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
/**
|
||||
Continue. addr is Address to resume. If addr is omitted, resume at current
|
||||
Address.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
ContinueAtAddress (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
)
|
||||
{
|
||||
if (PacketData[1] != '\0') {
|
||||
SystemContext.SystemContextArm->PC = AsciiStrHexToUintn(&PacketData[1]);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/** ‘s [addr ]’
|
||||
Single step. addr is the Address at which to resume. If addr is omitted, resume
|
||||
at same Address.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
SingleStep (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
)
|
||||
{
|
||||
SendNotSupported();
|
||||
}
|
||||
|
||||
|
||||
VOID
|
||||
EFIAPI
|
||||
InsertBreakPoint (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
)
|
||||
{
|
||||
SendNotSupported ();
|
||||
}
|
||||
|
||||
VOID
|
||||
EFIAPI
|
||||
RemoveBreakPoint (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
)
|
||||
{
|
||||
SendNotSupported ();
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Send the T signal with the given exception type (in gdb order) and possibly
|
||||
with n:r pairs related to the watchpoints
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param GdbExceptionType GDB exception type
|
||||
**/
|
||||
VOID
|
||||
ProcessorSendTSignal (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINT8 GdbExceptionType,
|
||||
IN OUT CHAR8 *TSignalPtr,
|
||||
IN UINTN SizeOfBuffer
|
||||
)
|
||||
{
|
||||
*TSignalPtr = '\0';
|
||||
}
|
||||
|
||||
/**
|
||||
FIQ state is only changed by FIQ exception. We don't want to take FIQ
|
||||
ticks in the GDB stub. The stub disables FIQ on entry, but this is the
|
||||
third instruction that executes in the execption handler. Thus we have
|
||||
a crack we need to test for.
|
||||
|
||||
@param PC PC of execption
|
||||
|
||||
@return TRUE We are in the GDB stub exception preamble
|
||||
@return FALSE We are not in GDB stub code
|
||||
**/
|
||||
BOOLEAN
|
||||
InFiqCrack (
|
||||
IN UINT32 PC
|
||||
)
|
||||
{
|
||||
UINT64 VectorBase = PcdGet64 (PcdCpuVectorBaseAddress);
|
||||
UINT32 Length = (UINTN)ExceptionHandlersEnd - (UINTN)ExceptionHandlersStart;
|
||||
|
||||
if ((PC >= VectorBase) && (PC <= (VectorBase + Length))) {
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Check to see if this exception is related to ctrl-c handling.
|
||||
|
||||
In this scheme we dedicate FIQ to the ctrl-c handler so it is
|
||||
independent of the rest of the system.
|
||||
|
||||
SaveAndSetDebugTimerInterrupt () can be used to
|
||||
|
||||
@param ExceptionType Exception that is being processed
|
||||
@param SystemContext Register content at time of the exception
|
||||
|
||||
@return TRUE This was a ctrl-c check that did not find a ctrl-c
|
||||
@return FALSE This was not a ctrl-c check or some one hit ctrl-c
|
||||
**/
|
||||
BOOLEAN
|
||||
ProcessorControlC (
|
||||
IN EFI_EXCEPTION_TYPE ExceptionType,
|
||||
IN OUT EFI_SYSTEM_CONTEXT SystemContext
|
||||
)
|
||||
{
|
||||
CHAR8 Char;
|
||||
BOOLEAN Return = TRUE;
|
||||
|
||||
if (ExceptionType != EXCEPT_ARM_FIQ) {
|
||||
// Skip it as it is not related to ctrl-c
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
if (InFiqCrack (SystemContext.SystemContextArm->PC)) {
|
||||
// We are in our own interrupt preable, so skip this tick.
|
||||
// We never want to let gdb see the debug stub running if we can help it
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
while (TRUE) {
|
||||
if (!GdbIsCharAvailable ()) {
|
||||
//
|
||||
// No characters are pending so exit the loop
|
||||
//
|
||||
Return = TRUE;
|
||||
break;
|
||||
}
|
||||
|
||||
Char = GdbGetChar ();
|
||||
if (Char == 0x03) {
|
||||
//
|
||||
// We have a ctrl-c so exit and process exception for ctrl-c
|
||||
//
|
||||
Return = FALSE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
DebugAgentTimerEndOfInterrupt ();
|
||||
|
||||
// Force an exit from the exception handler as we are done
|
||||
return Return;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Enable/Disable the interrupt of debug timer and return the interrupt state
|
||||
prior to the operation.
|
||||
|
||||
If EnableStatus is TRUE, enable the interrupt of debug timer.
|
||||
If EnableStatus is FALSE, disable the interrupt of debug timer.
|
||||
|
||||
@param[in] EnableStatus Enable/Disable.
|
||||
|
||||
@retval TRUE Debug timer interrupt were enabled on entry to this call.
|
||||
@retval FALSE Debug timer interrupt were disabled on entry to this call.
|
||||
|
||||
**/
|
||||
BOOLEAN
|
||||
EFIAPI
|
||||
SaveAndSetDebugTimerInterrupt (
|
||||
IN BOOLEAN EnableStatus
|
||||
)
|
||||
{
|
||||
BOOLEAN FiqEnabled;
|
||||
|
||||
FiqEnabled = ArmGetFiqState ();
|
||||
|
||||
if (EnableStatus) {
|
||||
DebugAgentTimerSetPeriod (PcdGet32 (PcdGdbTimerPeriodMilliseconds));
|
||||
ArmEnableFiq ();
|
||||
} else {
|
||||
DebugAgentTimerSetPeriod (0);
|
||||
ArmDisableFiq ();
|
||||
}
|
||||
|
||||
return FiqEnabled;
|
||||
}
|
||||
|
||||
|
||||
|
||||
VOID
|
||||
GdbFPutString (
|
||||
IN CHAR8 *String
|
||||
);
|
||||
|
||||
/**
|
||||
Initialize debug agent.
|
||||
|
||||
This function is used to set up debug environment to support source level debugging.
|
||||
If certain Debug Agent Library instance has to save some private data in the stack,
|
||||
this function must work on the mode that doesn't return to the caller, then
|
||||
the caller needs to wrap up all rest of logic after InitializeDebugAgent() into one
|
||||
function and pass it into InitializeDebugAgent(). InitializeDebugAgent() is
|
||||
responsible to invoke the passing-in function at the end of InitializeDebugAgent().
|
||||
|
||||
If the parameter Function is not NULL, Debug Agent Library instance will invoke it by
|
||||
passing in the Context to be its parameter.
|
||||
|
||||
If Function() is NULL, Debug Agent Library instance will return after setup debug
|
||||
environment.
|
||||
|
||||
@param[in] InitFlag Init flag is used to decide the initialize process.
|
||||
@param[in] Context Context needed according to InitFlag; it was optional.
|
||||
@param[in] Function Continue function called by debug agent library; it was
|
||||
optional.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InitializeDebugAgent (
|
||||
IN UINT32 InitFlag,
|
||||
IN VOID *Context, OPTIONAL
|
||||
IN DEBUG_AGENT_CONTINUE Function OPTIONAL
|
||||
)
|
||||
{
|
||||
UINTN Offset;
|
||||
UINTN Length;
|
||||
BOOLEAN IrqEnabled;
|
||||
UINT64 *VectorBase;
|
||||
|
||||
|
||||
//
|
||||
// Disable interrupts
|
||||
//
|
||||
IrqEnabled = ArmGetInterruptState ();
|
||||
ArmDisableInterrupts ();
|
||||
ArmDisableFiq ();
|
||||
|
||||
//
|
||||
// Copy an implementation of the ARM exception vectors to PcdCpuVectorBaseAddress.
|
||||
//
|
||||
Length = (UINTN)ExceptionHandlersEnd - (UINTN)ExceptionHandlersStart;
|
||||
|
||||
//
|
||||
// Reserve space for the exception handlers
|
||||
//
|
||||
VectorBase = (UINT64 *)(UINTN)PcdGet64 (PcdCpuVectorBaseAddress);
|
||||
|
||||
|
||||
// Copy our assembly code into the page that contains the exception vectors.
|
||||
CopyMem ((VOID *)VectorBase, (VOID *)ExceptionHandlersStart, Length);
|
||||
|
||||
//
|
||||
// Patch in the common Assembly exception handler
|
||||
//
|
||||
Offset = (UINTN)CommonExceptionEntry - (UINTN)ExceptionHandlersStart;
|
||||
*(UINTN *) (((UINT8 *)VectorBase) + Offset) = (UINTN)AsmCommonExceptionEntry;
|
||||
|
||||
// Flush Caches since we updated executable stuff
|
||||
InvalidateInstructionCacheRange ((VOID *)(UINTN)PcdGet64(PcdCpuVectorBaseAddress), Length);
|
||||
|
||||
// setup a timer so gdb can break in via ctrl-c
|
||||
DebugAgentTimerIntialize ();
|
||||
|
||||
if (IrqEnabled) {
|
||||
ArmEnableInterrupts ();
|
||||
}
|
||||
|
||||
if (Function != NULL) {
|
||||
Function (Context);
|
||||
}
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
|
|
@ -1,815 +0,0 @@
|
|||
/** @file
|
||||
Debug Agent library implementition with empty functions.
|
||||
|
||||
Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
|
||||
This program and the accompanying materials
|
||||
are licensed and made available under the terms and conditions of the BSD License
|
||||
which accompanies this distribution. The full text of the license may be found at
|
||||
http://opensource.org/licenses/bsd-license.php
|
||||
|
||||
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
||||
|
||||
**/
|
||||
|
||||
#include "GdbDebugAgent.h"
|
||||
|
||||
|
||||
UINTN gMaxProcessorIndex = 0;
|
||||
|
||||
//
|
||||
// Buffers for basic gdb communication
|
||||
//
|
||||
CHAR8 gInBuffer[MAX_BUF_SIZE];
|
||||
CHAR8 gOutBuffer[MAX_BUF_SIZE];
|
||||
|
||||
|
||||
//
|
||||
// Globals for returning XML from qXfer:libraries:read packet
|
||||
//
|
||||
UINTN gPacketqXferLibraryOffset = 0;
|
||||
UINTN gEfiDebugImageTableEntry = 0;
|
||||
CHAR8 gXferLibraryBuffer[2000];
|
||||
|
||||
GLOBAL_REMOVE_IF_UNREFERENCED CONST CHAR8 mHexToStr[] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
|
||||
|
||||
|
||||
// add-symbol-file c:/work/edk2/Build/BeagleBoard/DEBUG_GCC48/ARM/BeagleBoardPkg/Sec/Sec/DEBUG/BeagleBoardSec.dll 0x80008360
|
||||
CHAR8 *qXferHack = "<library name=\"c:/work/edk2/Build/BeagleBoard/DEBUG_GCC48/ARM/BeagleBoardPkg/Sec/Sec/DEBUG/BeagleBoardSec.dll\"><segment address=\"0x80008360\"/></library>";
|
||||
|
||||
UINTN
|
||||
gXferObjectReadResponse (
|
||||
IN CHAR8 Type,
|
||||
IN CHAR8 *Str
|
||||
)
|
||||
{
|
||||
CHAR8 *OutBufPtr; // pointer to the output buffer
|
||||
CHAR8 Char;
|
||||
UINTN Count;
|
||||
|
||||
// responce starts with 'm' or 'l' if it is the end
|
||||
OutBufPtr = gOutBuffer;
|
||||
*OutBufPtr++ = Type;
|
||||
Count = 1;
|
||||
|
||||
// Binary data encoding
|
||||
OutBufPtr = gOutBuffer;
|
||||
while (*Str != '\0') {
|
||||
Char = *Str++;
|
||||
if ((Char == 0x7d) || (Char == 0x23) || (Char == 0x24) || (Char == 0x2a)) {
|
||||
// escape character
|
||||
*OutBufPtr++ = 0x7d;
|
||||
|
||||
Char ^= 0x20;
|
||||
}
|
||||
*OutBufPtr++ = Char;
|
||||
Count++;
|
||||
}
|
||||
|
||||
*OutBufPtr = '\0' ; // the end of the buffer
|
||||
SendPacket (gOutBuffer);
|
||||
|
||||
return Count;
|
||||
}
|
||||
|
||||
/**
|
||||
Process "qXfer:object:read:annex:offset,length" request.
|
||||
|
||||
Returns an XML document that contains loaded libraries. In our case it is
|
||||
infomration in the EFI Debug Inmage Table converted into an XML document.
|
||||
|
||||
GDB will call with an arbitrary length (it can't know the real length and
|
||||
will reply with chunks of XML that are easy for us to deal with. Gdb will
|
||||
keep calling until we say we are done. XML doc looks like:
|
||||
|
||||
<library-list>
|
||||
<library name="/a/a/c/d.dSYM"><segment address="0x10000000"/></library>
|
||||
<library name="/a/m/e/e.pdb"><segment address="0x20000000"/></library>
|
||||
<library name="/a/l/f/f.dll"><segment address="0x30000000"/></library>
|
||||
</library-list>
|
||||
|
||||
Since we can not allocate memory in interupt context this module has
|
||||
assumptions about how it will get called:
|
||||
1) Length will generally be max remote packet size (big enough)
|
||||
2) First Offset of an XML document read needs to be 0
|
||||
3) This code will return back small chunks of the XML document on every read.
|
||||
Each subseqent call will ask for the next available part of the document.
|
||||
|
||||
Note: The only variable size element in the XML is:
|
||||
" <library name=\"%s\"><segment address=\"%p\"/></library>\n" and it is
|
||||
based on the file path and name of the symbol file. If the symbol file name
|
||||
is bigger than the max gdb remote packet size we could update this code
|
||||
to respond back in chunks.
|
||||
|
||||
@param Offset offset into special data area
|
||||
@param Length number of bytes to read starting at Offset
|
||||
|
||||
**/
|
||||
VOID
|
||||
QxferLibrary (
|
||||
IN UINTN Offset,
|
||||
IN UINTN Length
|
||||
)
|
||||
{
|
||||
gPacketqXferLibraryOffset += gXferObjectReadResponse ('m', "<library-list>\n");
|
||||
gPacketqXferLibraryOffset += gXferObjectReadResponse ('m', qXferHack);
|
||||
gXferObjectReadResponse ('l', "</library-list>\n");
|
||||
gPacketqXferLibraryOffset = 0;
|
||||
}
|
||||
|
||||
/**
|
||||
Transfer length bytes of input buffer, starting at Address, to memory.
|
||||
|
||||
@param length the number of the bytes to be transferred/written
|
||||
@param *address the start address of the transferring/writing the memory
|
||||
@param *new_data the new data to be written to memory
|
||||
**/
|
||||
|
||||
VOID
|
||||
TransferFromInBufToMem (
|
||||
IN UINTN Length,
|
||||
IN unsigned char *Address,
|
||||
IN CHAR8 *NewData
|
||||
)
|
||||
{
|
||||
CHAR8 c1;
|
||||
CHAR8 c2;
|
||||
|
||||
while (Length-- > 0) {
|
||||
c1 = (CHAR8)HexCharToInt (*NewData++);
|
||||
c2 = (CHAR8)HexCharToInt (*NewData++);
|
||||
|
||||
if ((c1 < 0) || (c2 < 0)) {
|
||||
SendError (GDB_EBADMEMDATA);
|
||||
return;
|
||||
}
|
||||
*Address++ = (UINT8)((c1 << 4) + c2);
|
||||
}
|
||||
|
||||
SendSuccess();
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Transfer Length bytes of memory starting at Address to an output buffer, OutBuffer. This function will finally send the buffer
|
||||
as a packet.
|
||||
|
||||
@param Length the number of the bytes to be transferred/read
|
||||
@param *address pointer to the start address of the transferring/reading the memory
|
||||
**/
|
||||
|
||||
VOID
|
||||
TransferFromMemToOutBufAndSend (
|
||||
IN UINTN Length,
|
||||
IN unsigned char *Address
|
||||
)
|
||||
{
|
||||
// there are Length bytes and every byte is represented as 2 hex chars
|
||||
CHAR8 OutBuffer[MAX_BUF_SIZE];
|
||||
CHAR8 *OutBufPtr; // pointer to the output buffer
|
||||
CHAR8 Char;
|
||||
|
||||
OutBufPtr = OutBuffer;
|
||||
while (Length > 0) {
|
||||
|
||||
Char = mHexToStr[*Address >> 4];
|
||||
if ((Char >= 'A') && (Char <= 'F')) {
|
||||
Char = Char - 'A' + 'a';
|
||||
}
|
||||
*OutBufPtr++ = Char;
|
||||
|
||||
Char = mHexToStr[*Address & 0x0f];
|
||||
if ((Char >= 'A') && (Char <= 'F')) {
|
||||
Char = Char - 'A' + 'a';
|
||||
}
|
||||
*OutBufPtr++ = Char;
|
||||
|
||||
Address++;
|
||||
Length--;
|
||||
}
|
||||
|
||||
*OutBufPtr = '\0' ; // the end of the buffer
|
||||
SendPacket (OutBuffer);
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
Send a GDB Remote Serial Protocol Packet
|
||||
|
||||
$PacketData#checksum PacketData is passed in and this function adds the packet prefix '$',
|
||||
the packet teminating character '#' and the two digit checksum.
|
||||
|
||||
If an ack '+' is not sent resend the packet, but timeout eventually so we don't end up
|
||||
in an infinit loop. This is so if you unplug the debugger code just keeps running
|
||||
|
||||
@param PacketData Payload data for the packet
|
||||
|
||||
|
||||
@retval Number of bytes of packet data sent.
|
||||
|
||||
**/
|
||||
UINTN
|
||||
SendPacket (
|
||||
IN CHAR8 *PacketData
|
||||
)
|
||||
{
|
||||
UINT8 CheckSum;
|
||||
UINTN Timeout;
|
||||
CHAR8 *Ptr;
|
||||
CHAR8 TestChar;
|
||||
UINTN Count;
|
||||
|
||||
Timeout = PcdGet32 (PcdGdbMaxPacketRetryCount);
|
||||
|
||||
Count = 0;
|
||||
do {
|
||||
|
||||
Ptr = PacketData;
|
||||
|
||||
if (Timeout-- == 0) {
|
||||
// Only try a finite number of times so we don't get stuck in the loop
|
||||
return Count;
|
||||
}
|
||||
|
||||
// Packet prefix
|
||||
GdbPutChar ('$');
|
||||
|
||||
for (CheckSum = 0, Count =0 ; *Ptr != '\0'; Ptr++, Count++) {
|
||||
GdbPutChar (*Ptr);
|
||||
CheckSum = CheckSum + *Ptr;
|
||||
}
|
||||
|
||||
// Packet terminating character and checksum
|
||||
GdbPutChar ('#');
|
||||
GdbPutChar (mHexToStr[CheckSum >> 4]);
|
||||
GdbPutChar (mHexToStr[CheckSum & 0x0F]);
|
||||
|
||||
TestChar = GdbGetChar ();
|
||||
} while (TestChar != '+');
|
||||
|
||||
return Count;
|
||||
}
|
||||
|
||||
/**
|
||||
Receive a GDB Remote Serial Protocol Packet
|
||||
|
||||
$PacketData#checksum PacketData is passed in and this function adds the packet prefix '$',
|
||||
the packet teminating character '#' and the two digit checksum.
|
||||
|
||||
If host re-starts sending a packet without ending the previous packet, only the last valid packet is processed.
|
||||
(In other words, if received packet is '$12345$12345$123456#checksum', only '$123456#checksum' will be processed.)
|
||||
|
||||
If an ack '+' is not sent resend the packet
|
||||
|
||||
@param PacketData Payload data for the packet
|
||||
|
||||
@retval Number of bytes of packet data received.
|
||||
|
||||
**/
|
||||
UINTN
|
||||
ReceivePacket (
|
||||
OUT CHAR8 *PacketData,
|
||||
IN UINTN PacketDataSize
|
||||
)
|
||||
{
|
||||
UINT8 CheckSum;
|
||||
UINTN Index;
|
||||
CHAR8 Char;
|
||||
CHAR8 SumString[3];
|
||||
CHAR8 TestChar;
|
||||
|
||||
ZeroMem (PacketData, PacketDataSize);
|
||||
|
||||
for (;;) {
|
||||
// wait for the start of a packet
|
||||
TestChar = GdbGetChar ();
|
||||
while (TestChar != '$') {
|
||||
TestChar = GdbGetChar ();
|
||||
};
|
||||
|
||||
retry:
|
||||
for (Index = 0, CheckSum = 0; Index < (PacketDataSize - 1); Index++) {
|
||||
Char = GdbGetChar ();
|
||||
if (Char == '$') {
|
||||
goto retry;
|
||||
}
|
||||
if (Char == '#') {
|
||||
break;
|
||||
}
|
||||
|
||||
PacketData[Index] = Char;
|
||||
CheckSum = CheckSum + Char;
|
||||
}
|
||||
PacketData[Index] = '\0';
|
||||
|
||||
if (Index == PacketDataSize) {
|
||||
continue;
|
||||
}
|
||||
|
||||
SumString[0] = GdbGetChar ();
|
||||
SumString[1] = GdbGetChar ();
|
||||
SumString[2] = '\0';
|
||||
|
||||
if (AsciiStrHexToUintn (SumString) == CheckSum) {
|
||||
// Ack: Success
|
||||
GdbPutChar ('+');
|
||||
|
||||
// Null terminate the callers string
|
||||
PacketData[Index] = '\0';
|
||||
return Index;
|
||||
} else {
|
||||
// Ack: Failure
|
||||
GdbPutChar ('-');
|
||||
}
|
||||
}
|
||||
|
||||
//return 0;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Empties the given buffer
|
||||
@param Buf pointer to the first element in buffer to be emptied
|
||||
**/
|
||||
VOID
|
||||
EmptyBuffer (
|
||||
IN CHAR8 *Buf
|
||||
)
|
||||
{
|
||||
*Buf = '\0';
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Converts an 8-bit Hex Char into a INTN.
|
||||
|
||||
@param Char the hex character to be converted into UINTN
|
||||
@retval a INTN, from 0 to 15, that corressponds to Char
|
||||
-1 if Char is not a hex character
|
||||
**/
|
||||
INTN
|
||||
HexCharToInt (
|
||||
IN CHAR8 Char
|
||||
)
|
||||
{
|
||||
if ((Char >= 'A') && (Char <= 'F')) {
|
||||
return Char - 'A' + 10;
|
||||
} else if ((Char >= 'a') && (Char <= 'f')) {
|
||||
return Char - 'a' + 10;
|
||||
} else if ((Char >= '0') && (Char <= '9')) {
|
||||
return Char - '0';
|
||||
} else { // if not a hex value, return a negative value
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
// 'E' + the biggest error number is 255, so its 2 hex digits + buffer end
|
||||
CHAR8 *gError = "E__";
|
||||
|
||||
/** 'E NN'
|
||||
Send an error with the given error number after converting to hex.
|
||||
The error number is put into the buffer in hex. '255' is the biggest errno we can send.
|
||||
ex: 162 will be sent as A2.
|
||||
|
||||
@param errno the error number that will be sent
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
SendError (
|
||||
IN UINT8 ErrorNum
|
||||
)
|
||||
{
|
||||
//
|
||||
// Replace _, or old data, with current errno
|
||||
//
|
||||
gError[1] = mHexToStr [ErrorNum >> 4];
|
||||
gError[2] = mHexToStr [ErrorNum & 0x0f];
|
||||
|
||||
SendPacket (gError); // send buffer
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
Send 'OK' when the function is done executing successfully.
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
SendSuccess (
|
||||
VOID
|
||||
)
|
||||
{
|
||||
SendPacket ("OK"); // send buffer
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Send empty packet to specify that particular command/functionality is not supported.
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
SendNotSupported (
|
||||
VOID
|
||||
)
|
||||
{
|
||||
SendPacket ("");
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
/**
|
||||
Translates the EFI mapping to GDB mapping
|
||||
|
||||
@param EFIExceptionType EFI Exception that is being processed
|
||||
@retval UINTN that corresponds to EFIExceptionType's GDB exception type number
|
||||
**/
|
||||
UINT8
|
||||
ConvertEFItoGDBtype (
|
||||
IN EFI_EXCEPTION_TYPE EFIExceptionType
|
||||
)
|
||||
{
|
||||
UINTN i;
|
||||
|
||||
for (i=0; i < MaxEfiException() ; i++) {
|
||||
if (gExceptionType[i].Exception == EFIExceptionType) {
|
||||
return gExceptionType[i].SignalNo;
|
||||
}
|
||||
}
|
||||
return GDB_SIGTRAP; // this is a GDB trap
|
||||
}
|
||||
|
||||
|
||||
/** "m addr,length"
|
||||
Find the Length of the area to read and the start addres. Finally, pass them to
|
||||
another function, TransferFromMemToOutBufAndSend, that will read from that memory space and
|
||||
send it as a packet.
|
||||
**/
|
||||
|
||||
VOID
|
||||
EFIAPI
|
||||
ReadFromMemory (
|
||||
CHAR8 *PacketData
|
||||
)
|
||||
{
|
||||
UINTN Address;
|
||||
UINTN Length;
|
||||
CHAR8 AddressBuffer[MAX_ADDR_SIZE]; // the buffer that will hold the address in hex chars
|
||||
CHAR8 *AddrBufPtr; // pointer to the address buffer
|
||||
CHAR8 *InBufPtr; /// pointer to the input buffer
|
||||
|
||||
AddrBufPtr = AddressBuffer;
|
||||
InBufPtr = &PacketData[1];
|
||||
while (*InBufPtr != ',') {
|
||||
*AddrBufPtr++ = *InBufPtr++;
|
||||
}
|
||||
*AddrBufPtr = '\0';
|
||||
|
||||
InBufPtr++; // this skips ',' in the buffer
|
||||
|
||||
/* Error checking */
|
||||
if (AsciiStrLen(AddressBuffer) >= MAX_ADDR_SIZE) {
|
||||
SendError (GDB_EBADMEMADDRBUFSIZE);
|
||||
return;
|
||||
}
|
||||
|
||||
// 2 = 'm' + ','
|
||||
if (AsciiStrLen(PacketData) - AsciiStrLen(AddressBuffer) - 2 >= MAX_LENGTH_SIZE) {
|
||||
SendError (GDB_EBADMEMLENGTH);
|
||||
return;
|
||||
}
|
||||
|
||||
Address = AsciiStrHexToUintn (AddressBuffer);
|
||||
Length = AsciiStrHexToUintn (InBufPtr);
|
||||
|
||||
TransferFromMemToOutBufAndSend (Length, (unsigned char *)Address);
|
||||
}
|
||||
|
||||
|
||||
/** "M addr,length :XX..."
|
||||
Find the Length of the area in bytes to write and the start addres. Finally, pass them to
|
||||
another function, TransferFromInBufToMem, that will write to that memory space the info in
|
||||
the input buffer.
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
WriteToMemory (
|
||||
IN CHAR8 *PacketData
|
||||
)
|
||||
{
|
||||
UINTN Address;
|
||||
UINTN Length;
|
||||
UINTN MessageLength;
|
||||
CHAR8 AddressBuffer[MAX_ADDR_SIZE]; // the buffer that will hold the Address in hex chars
|
||||
CHAR8 LengthBuffer[MAX_LENGTH_SIZE]; // the buffer that will hold the Length in hex chars
|
||||
CHAR8 *AddrBufPtr; // pointer to the Address buffer
|
||||
CHAR8 *LengthBufPtr; // pointer to the Length buffer
|
||||
CHAR8 *InBufPtr; /// pointer to the input buffer
|
||||
|
||||
AddrBufPtr = AddressBuffer;
|
||||
LengthBufPtr = LengthBuffer;
|
||||
InBufPtr = &PacketData[1];
|
||||
|
||||
while (*InBufPtr != ',') {
|
||||
*AddrBufPtr++ = *InBufPtr++;
|
||||
}
|
||||
*AddrBufPtr = '\0';
|
||||
|
||||
InBufPtr++; // this skips ',' in the buffer
|
||||
|
||||
while (*InBufPtr != ':') {
|
||||
*LengthBufPtr++ = *InBufPtr++;
|
||||
}
|
||||
*LengthBufPtr = '\0';
|
||||
|
||||
InBufPtr++; // this skips ':' in the buffer
|
||||
|
||||
Address = AsciiStrHexToUintn (AddressBuffer);
|
||||
Length = AsciiStrHexToUintn (LengthBuffer);
|
||||
|
||||
/* Error checking */
|
||||
|
||||
//Check if Address is not too long.
|
||||
if (AsciiStrLen(AddressBuffer) >= MAX_ADDR_SIZE) {
|
||||
SendError (GDB_EBADMEMADDRBUFSIZE);
|
||||
return;
|
||||
}
|
||||
|
||||
//Check if message length is not too long
|
||||
if (AsciiStrLen(LengthBuffer) >= MAX_LENGTH_SIZE) {
|
||||
SendError (GDB_EBADMEMLENGBUFSIZE);
|
||||
return;
|
||||
}
|
||||
|
||||
// Check if Message is not too long/short.
|
||||
// 3 = 'M' + ',' + ':'
|
||||
MessageLength = (AsciiStrLen(PacketData) - AsciiStrLen(AddressBuffer) - AsciiStrLen(LengthBuffer) - 3);
|
||||
if (MessageLength != (2*Length)) {
|
||||
//Message too long/short. New data is not the right size.
|
||||
SendError (GDB_EBADMEMDATASIZE);
|
||||
return;
|
||||
}
|
||||
TransferFromInBufToMem (Length, (unsigned char *)Address, InBufPtr);
|
||||
}
|
||||
|
||||
/**
|
||||
Parses breakpoint packet data and captures Breakpoint type, Address and length.
|
||||
In case of an error, function returns particular error code. Returning 0 meaning
|
||||
no error.
|
||||
|
||||
@param PacketData Pointer to the payload data for the packet.
|
||||
@param Type Breakpoint type
|
||||
@param Address Breakpoint address
|
||||
@param Length Breakpoint length in Bytes (1 byte, 2 byte, 4 byte)
|
||||
|
||||
@retval 1 Success
|
||||
@retval {other} Particular error code
|
||||
|
||||
**/
|
||||
UINTN
|
||||
ParseBreakpointPacket (
|
||||
IN CHAR8 *PacketData,
|
||||
OUT UINTN *Type,
|
||||
OUT UINTN *Address,
|
||||
OUT UINTN *Length
|
||||
)
|
||||
{
|
||||
CHAR8 AddressBuffer[MAX_ADDR_SIZE];
|
||||
CHAR8 *AddressBufferPtr;
|
||||
CHAR8 *PacketDataPtr;
|
||||
|
||||
PacketDataPtr = &PacketData[1];
|
||||
AddressBufferPtr = AddressBuffer;
|
||||
|
||||
*Type = AsciiStrHexToUintn (PacketDataPtr);
|
||||
|
||||
//Breakpoint/watchpoint type should be between 0 to 4
|
||||
if (*Type > 4) {
|
||||
return 22; //EINVAL: Invalid argument.
|
||||
}
|
||||
|
||||
//Skip ',' in the buffer.
|
||||
while (*PacketDataPtr++ != ',');
|
||||
|
||||
//Parse Address information
|
||||
while (*PacketDataPtr != ',') {
|
||||
*AddressBufferPtr++ = *PacketDataPtr++;
|
||||
}
|
||||
*AddressBufferPtr = '\0';
|
||||
|
||||
//Check if Address is not too long.
|
||||
if (AsciiStrLen(AddressBuffer) >= MAX_ADDR_SIZE) {
|
||||
return 40; //EMSGSIZE: Message size too long.
|
||||
}
|
||||
|
||||
*Address = AsciiStrHexToUintn (AddressBuffer);
|
||||
|
||||
PacketDataPtr++; //This skips , in the buffer
|
||||
|
||||
//Parse Length information
|
||||
*Length = AsciiStrHexToUintn (PacketDataPtr);
|
||||
|
||||
//Length should be 1, 2 or 4 bytes
|
||||
if (*Length > 4) {
|
||||
return 22; //EINVAL: Invalid argument
|
||||
}
|
||||
|
||||
return 0; //0 = No error
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
Send the T signal with the given exception type (in gdb order) and possibly with n:r pairs related to the watchpoints
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param GdbExceptionType GDB exception type
|
||||
**/
|
||||
VOID
|
||||
GdbSendTSignal (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINT8 GdbExceptionType
|
||||
)
|
||||
{
|
||||
CHAR8 TSignalBuffer[128];
|
||||
CHAR8 *TSignalPtr;
|
||||
|
||||
TSignalPtr = &TSignalBuffer[0];
|
||||
|
||||
//Construct TSignal packet
|
||||
*TSignalPtr++ = 'T';
|
||||
|
||||
//
|
||||
// replace _, or previous value, with Exception type
|
||||
//
|
||||
*TSignalPtr++ = mHexToStr [GdbExceptionType >> 4];
|
||||
*TSignalPtr++ = mHexToStr [GdbExceptionType & 0x0f];
|
||||
|
||||
ProcessorSendTSignal (SystemContext, GdbExceptionType, TSignalPtr, sizeof (TSignalBuffer) - 2);
|
||||
|
||||
SendPacket (TSignalBuffer);
|
||||
}
|
||||
|
||||
VOID
|
||||
GdbFWrite (
|
||||
IN UINTN Fd,
|
||||
IN CHAR8 *Data,
|
||||
IN UINTN DataSize
|
||||
)
|
||||
{
|
||||
CHAR8 Buffer[128];
|
||||
|
||||
AsciiSPrint (Buffer, sizeof (Buffer), "Fwrite,%x,%x,%x", Fd, Data, DataSize);
|
||||
SendPacket (Buffer);
|
||||
|
||||
for( ; ; ) {
|
||||
ReceivePacket (gInBuffer, MAX_BUF_SIZE);
|
||||
|
||||
switch (gInBuffer[0]) {
|
||||
case 'm':
|
||||
ReadFromMemory (gInBuffer);
|
||||
break;
|
||||
|
||||
case 'M':
|
||||
WriteToMemory (gInBuffer);
|
||||
break;
|
||||
|
||||
case 'F':
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
VOID
|
||||
GdbFPutString (
|
||||
IN CHAR8 *String
|
||||
)
|
||||
{
|
||||
UINTN Len = AsciiStrSize (String);
|
||||
|
||||
GdbFWrite (2, String, Len);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Exception Hanldler for GDB. It will be called for all exceptions
|
||||
registered via the gExceptionType[] array.
|
||||
|
||||
@param ExceptionType Exception that is being processed
|
||||
@param SystemContext Register content at time of the exception
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
GdbExceptionHandler (
|
||||
IN EFI_EXCEPTION_TYPE ExceptionType,
|
||||
IN OUT EFI_SYSTEM_CONTEXT SystemContext
|
||||
)
|
||||
{
|
||||
UINT8 GdbExceptionType;
|
||||
CHAR8 *Ptr;
|
||||
|
||||
if (ProcessorControlC (ExceptionType, SystemContext)) {
|
||||
// We tried to process a control C handler and there is nothing to do
|
||||
return;
|
||||
}
|
||||
|
||||
GdbExceptionType = ConvertEFItoGDBtype (ExceptionType);
|
||||
GdbSendTSignal (SystemContext, GdbExceptionType);
|
||||
|
||||
for( ; ; ) {
|
||||
ReceivePacket (gInBuffer, MAX_BUF_SIZE);
|
||||
|
||||
switch (gInBuffer[0]) {
|
||||
case '?':
|
||||
GdbSendTSignal (SystemContext, GdbExceptionType);
|
||||
break;
|
||||
|
||||
case 'c':
|
||||
ContinueAtAddress (SystemContext, gInBuffer);
|
||||
return;
|
||||
|
||||
case 'D':
|
||||
// gdb wants to disconnect so return "OK" packet since.
|
||||
SendSuccess ();
|
||||
return;
|
||||
|
||||
case 'g':
|
||||
ReadGeneralRegisters (SystemContext);
|
||||
break;
|
||||
|
||||
case 'G':
|
||||
WriteGeneralRegisters (SystemContext, gInBuffer);
|
||||
break;
|
||||
|
||||
case 'H':
|
||||
//Return "OK" packet since we don't have more than one thread.
|
||||
SendSuccess ();
|
||||
break;
|
||||
|
||||
case 'm':
|
||||
ReadFromMemory (gInBuffer);
|
||||
break;
|
||||
|
||||
case 'M':
|
||||
WriteToMemory (gInBuffer);
|
||||
break;
|
||||
|
||||
case 'P':
|
||||
WriteNthRegister (SystemContext, gInBuffer);
|
||||
break;
|
||||
|
||||
//
|
||||
// Still debugging this code. Not used in Darwin
|
||||
//
|
||||
case 'q':
|
||||
// General Query Packets
|
||||
if (AsciiStrnCmp (gInBuffer, "qSupported", 10) == 0) {
|
||||
// return what we currently support, we don't parse what gdb suports
|
||||
AsciiSPrint (gOutBuffer, MAX_BUF_SIZE, "qXfer:libraries:read+;PacketSize=%d", MAX_BUF_SIZE);
|
||||
SendPacket (gOutBuffer);
|
||||
} else if (AsciiStrnCmp (gInBuffer, "qXfer:libraries:read::", 22) == 0) {
|
||||
// ‘qXfer:libraries:read::offset,length
|
||||
// gInBuffer[22] is offset string, ++Ptr is length string’
|
||||
for (Ptr = &gInBuffer[22]; *Ptr != ','; Ptr++);
|
||||
|
||||
// Not sure if multi-radix support is required. Currently only support decimal
|
||||
QxferLibrary (AsciiStrHexToUintn (&gInBuffer[22]), AsciiStrHexToUintn (++Ptr));
|
||||
} else if (AsciiStrnCmp (gInBuffer, "qOffsets", 8) == 0) {
|
||||
AsciiSPrint (gOutBuffer, MAX_BUF_SIZE, "Text=1000;Data=f000;Bss=f000");
|
||||
SendPacket (gOutBuffer);
|
||||
} else if (AsciiStrnCmp (gInBuffer, "qAttached", 9) == 0) {
|
||||
// remote server attached to an existing process
|
||||
SendPacket ("1");
|
||||
} else {
|
||||
//Send empty packet
|
||||
SendNotSupported ();
|
||||
}
|
||||
break;
|
||||
|
||||
case 's':
|
||||
SingleStep (SystemContext, gInBuffer);
|
||||
return;
|
||||
|
||||
case 'z':
|
||||
RemoveBreakPoint (SystemContext, gInBuffer);
|
||||
break;
|
||||
|
||||
case 'Z':
|
||||
InsertBreakPoint (SystemContext, gInBuffer);
|
||||
break;
|
||||
|
||||
default:
|
||||
//Send empty packet
|
||||
SendNotSupported ();
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
|
@ -1,728 +0,0 @@
|
|||
/** @file
|
||||
Private include file for GDB stub
|
||||
|
||||
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
|
||||
|
||||
This program and the accompanying materials
|
||||
are licensed and made available under the terms and conditions of the BSD License
|
||||
which accompanies this distribution. The full text of the license may be found at
|
||||
http://opensource.org/licenses/bsd-license.php
|
||||
|
||||
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
||||
|
||||
**/
|
||||
|
||||
#ifndef __GCC_DEBUG_AGENT_INTERNAL__
|
||||
#define __GCC_DEBUG_AGENT_INTERNAL__
|
||||
|
||||
#include <Uefi.h>
|
||||
#include <Library/BaseLib.h>
|
||||
#include <Library/BaseMemoryLib.h>
|
||||
#include <Library/MemoryAllocationLib.h>
|
||||
#include <Library/DebugLib.h>
|
||||
#include <Library/PcdLib.h>
|
||||
#include <Library/GdbSerialLib.h>
|
||||
#include <Library/PrintLib.h>
|
||||
#include <Library/CacheMaintenanceLib.h>
|
||||
#include <Library/DebugAgentTimerLib.h>
|
||||
#include <Library/DebugAgentLib.h>
|
||||
|
||||
#include <IndustryStandard/PeImage.h>
|
||||
#include <Protocol/DebugSupport.h>
|
||||
|
||||
extern CONST CHAR8 mHexToStr[];
|
||||
|
||||
// maximum size of input and output buffers
|
||||
// This value came from the show remote command of the gdb we tested against
|
||||
#define MAX_BUF_SIZE 2000
|
||||
|
||||
// maximum size of address buffer
|
||||
#define MAX_ADDR_SIZE 32
|
||||
|
||||
// maximum size of register number buffer
|
||||
#define MAX_REG_NUM_BUF_SIZE 32
|
||||
|
||||
// maximum size of length buffer
|
||||
#define MAX_LENGTH_SIZE 32
|
||||
|
||||
// maximum size of T signal members
|
||||
#define MAX_T_SIGNAL_SIZE 64
|
||||
|
||||
// the mask used to clear all the cache
|
||||
#define TF_BIT 0x00000100
|
||||
|
||||
|
||||
//
|
||||
// GDB Signal definitions - generic names for interrupts
|
||||
//
|
||||
#define GDB_SIGINT 2 // Interrupt process via ctrl-c
|
||||
#define GDB_SIGILL 4 // Illegal instruction
|
||||
#define GDB_SIGTRAP 5 // Trace Trap (Breakpoint and SingleStep)
|
||||
#define GDB_SIGEMT 7 // Emulator Trap
|
||||
#define GDB_SIGFPE 8 // Floating point exception
|
||||
#define GDB_SIGSEGV 11 // Setgment violation, page fault
|
||||
|
||||
|
||||
//
|
||||
// GDB File I/O Error values, zero means no error
|
||||
// Includes all general GDB Unix like error values
|
||||
//
|
||||
#define GDB_EBADMEMADDRBUFSIZE 11 // the buffer that stores memory Address to be read from/written to is not the right size
|
||||
#define GDB_EBADMEMLENGBUFSIZE 12 // the buffer that stores Length is not the right size
|
||||
#define GDB_EBADMEMLENGTH 13 // Length, the given number of bytes to read or write, is not the right size
|
||||
#define GDB_EBADMEMDATA 14 // one of the bytes or nibbles of the memory is leess than 0
|
||||
#define GDB_EBADMEMDATASIZE 15 // the memory data, 'XX..', is too short or too long
|
||||
#define GDB_EBADBUFSIZE 21 // the buffer created is not the correct size
|
||||
#define GDB_EINVALIDARG 31 // argument is invalid
|
||||
#define GDB_ENOSPACE 41 //
|
||||
#define GDB_EINVALIDBRKPOINTTYPE 51 // the breakpoint type is not recognized
|
||||
#define GDB_EINVALIDREGNUM 61 // given register number is not valid: either <0 or >=Number of Registers
|
||||
#define GDB_EUNKNOWN 255 // unknown
|
||||
|
||||
|
||||
//
|
||||
// These devices are open by GDB so we can just read and write to them
|
||||
//
|
||||
#define GDB_STDIN 0x00
|
||||
#define GDB_STDOUT 0x01
|
||||
#define GDB_STDERR 0x02
|
||||
|
||||
//
|
||||
//Define Register size for different architectures
|
||||
//
|
||||
#if defined (MDE_CPU_IA32)
|
||||
#define REG_SIZE 32
|
||||
#elif defined (MDE_CPU_X64)
|
||||
#define REG_SIZE 64
|
||||
#elif defined (MDE_CPU_ARM)
|
||||
#define REG_SIZE 32
|
||||
#endif
|
||||
|
||||
|
||||
typedef struct {
|
||||
EFI_EXCEPTION_TYPE Exception;
|
||||
UINT8 SignalNo;
|
||||
} EFI_EXCEPTION_TYPE_ENTRY;
|
||||
|
||||
|
||||
#if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64)
|
||||
|
||||
//
|
||||
// Byte packed structure for DR6
|
||||
// 32-bits on IA-32
|
||||
// 64-bits on X64. The upper 32-bits on X64 are reserved
|
||||
//
|
||||
typedef union {
|
||||
struct {
|
||||
UINT32 B0:1; // Breakpoint condition detected
|
||||
UINT32 B1:1; // Breakpoint condition detected
|
||||
UINT32 B2:1; // Breakpoint condition detected
|
||||
UINT32 B3:1; // Breakpoint condition detected
|
||||
UINT32 Reserved_1:9; // Reserved
|
||||
UINT32 BD:1; // Debug register access detected
|
||||
UINT32 BS:1; // Single step
|
||||
UINT32 BT:1; // Task switch
|
||||
UINT32 Reserved_2:16; // Reserved
|
||||
} Bits;
|
||||
UINTN UintN;
|
||||
} IA32_DR6;
|
||||
|
||||
//
|
||||
// Byte packed structure for DR7
|
||||
// 32-bits on IA-32
|
||||
// 64-bits on X64. The upper 32-bits on X64 are reserved
|
||||
//
|
||||
typedef union {
|
||||
struct {
|
||||
UINT32 L0:1; // Local breakpoint enable
|
||||
UINT32 G0:1; // Global breakpoint enable
|
||||
UINT32 L1:1; // Local breakpoint enable
|
||||
UINT32 G1:1; // Global breakpoint enable
|
||||
UINT32 L2:1; // Local breakpoint enable
|
||||
UINT32 G2:1; // Global breakpoint enable
|
||||
UINT32 L3:1; // Local breakpoint enable
|
||||
UINT32 G3:1; // Global breakpoint enable
|
||||
UINT32 LE:1; // Local exact breakpoint enable
|
||||
UINT32 GE:1; // Global exact breakpoint enable
|
||||
UINT32 Reserved_1:3; // Reserved
|
||||
UINT32 GD:1; // Global detect enable
|
||||
UINT32 Reserved_2:2; // Reserved
|
||||
UINT32 RW0:2; // Read/Write field
|
||||
UINT32 LEN0:2; // Length field
|
||||
UINT32 RW1:2; // Read/Write field
|
||||
UINT32 LEN1:2; // Length field
|
||||
UINT32 RW2:2; // Read/Write field
|
||||
UINT32 LEN2:2; // Length field
|
||||
UINT32 RW3:2; // Read/Write field
|
||||
UINT32 LEN3:2; // Length field
|
||||
} Bits;
|
||||
UINTN UintN;
|
||||
} IA32_DR7;
|
||||
|
||||
#endif /* if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64) */
|
||||
|
||||
typedef enum {
|
||||
InstructionExecution, //Hardware breakpoint
|
||||
DataWrite, //watch
|
||||
DataRead, //rwatch
|
||||
DataReadWrite, //awatch
|
||||
SoftwareBreakpoint, //Software breakpoint
|
||||
NotSupported
|
||||
} BREAK_TYPE;
|
||||
|
||||
//
|
||||
// Array of exception types that need to be hooked by the debugger
|
||||
//
|
||||
extern EFI_EXCEPTION_TYPE_ENTRY gExceptionType[];
|
||||
|
||||
//
|
||||
// If the periodic callback is called while we are processing an F packet we need
|
||||
// to let the callback know to not read from the serail stream as it could steal
|
||||
// characters from the F reponse packet
|
||||
//
|
||||
extern BOOLEAN gProcessingFPacket;
|
||||
|
||||
|
||||
/**
|
||||
Return the number of entries in the gExceptionType[]
|
||||
|
||||
@retval UINTN, the number of entries in the gExceptionType[] array.
|
||||
**/
|
||||
UINTN
|
||||
MaxEfiException (
|
||||
VOID
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Check to see if the ISA is supported.
|
||||
ISA = Instruction Set Architecture
|
||||
|
||||
@retval TRUE if Isa is supported,
|
||||
FALSE otherwise.
|
||||
**/
|
||||
BOOLEAN
|
||||
CheckIsa (
|
||||
IN EFI_INSTRUCTION_SET_ARCHITECTURE Isa
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Send the T signal with the given exception type (in gdb order) and possibly with n:r pairs related to the watchpoints
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param GdbExceptionType GDB exception type
|
||||
**/
|
||||
|
||||
VOID
|
||||
GdbSendTSignal (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINT8 GdbExceptionType
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Translates the EFI mapping to GDB mapping
|
||||
|
||||
@param EFIExceptionType EFI Exception that is being processed
|
||||
@retval UINTN that corresponds to EFIExceptionType's GDB exception type number
|
||||
**/
|
||||
UINT8
|
||||
ConvertEFItoGDBtype (
|
||||
IN EFI_EXCEPTION_TYPE EFIExceptionType
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Empties the given buffer
|
||||
@param *Buf pointer to the first element in buffer to be emptied
|
||||
**/
|
||||
VOID
|
||||
EmptyBuffer (
|
||||
IN CHAR8 *Buf
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Converts an 8-bit Hex Char into a INTN.
|
||||
|
||||
@param Char - the hex character to be converted into UINTN
|
||||
@retval a INTN, from 0 to 15, that corressponds to Char
|
||||
-1 if Char is not a hex character
|
||||
**/
|
||||
INTN
|
||||
HexCharToInt (
|
||||
IN CHAR8 Char
|
||||
);
|
||||
|
||||
|
||||
/** 'E NN'
|
||||
Send an error with the given error number after converting to hex.
|
||||
The error number is put into the buffer in hex. '255' is the biggest errno we can send.
|
||||
ex: 162 will be sent as A2.
|
||||
|
||||
@param errno the error number that will be sent
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
SendError (
|
||||
IN UINT8 ErrorNum
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Send 'OK' when the function is done executing successfully.
|
||||
**/
|
||||
VOID
|
||||
SendSuccess (
|
||||
VOID
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Send empty packet to specify that particular command/functionality is not supported.
|
||||
**/
|
||||
VOID
|
||||
SendNotSupported (
|
||||
VOID
|
||||
);
|
||||
|
||||
/** ‘p n’
|
||||
Reads the n-th register's value into an output buffer and sends it as a packet
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param InBuffer This is the input buffer received from gdb server
|
||||
**/
|
||||
VOID
|
||||
ReadNthRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *InBuffer
|
||||
);
|
||||
|
||||
|
||||
/** ‘g’
|
||||
Reads the general registers into an output buffer and sends it as a packet
|
||||
@param SystemContext Register content at time of the exception
|
||||
**/
|
||||
VOID
|
||||
ReadGeneralRegisters (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext
|
||||
);
|
||||
|
||||
|
||||
/** ‘P n...=r...’
|
||||
Writes the new value of n-th register received into the input buffer to the n-th register
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param InBuffer This is the input buffer received from gdb server
|
||||
**/
|
||||
VOID
|
||||
WriteNthRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *InBuffer
|
||||
);
|
||||
|
||||
|
||||
/** ‘G XX...’
|
||||
Writes the new values received into the input buffer to the general registers
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param InBuffer Pointer to the input buffer received from gdb server
|
||||
**/
|
||||
|
||||
VOID
|
||||
WriteGeneralRegisters (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *InBuffer
|
||||
);
|
||||
|
||||
|
||||
/** ‘m addr,length ’
|
||||
Find the Length of the area to read and the start addres. Finally, pass them to
|
||||
another function, TransferFromMemToOutBufAndSend, that will read from that memory space and
|
||||
send it as a packet.
|
||||
|
||||
@param *PacketData Pointer to Payload data for the packet
|
||||
**/
|
||||
VOID
|
||||
ReadFromMemory (
|
||||
IN CHAR8 *PacketData
|
||||
);
|
||||
|
||||
|
||||
/** ‘M addr,length :XX...’
|
||||
Find the Length of the area in bytes to write and the start addres. Finally, pass them to
|
||||
another function, TransferFromInBufToMem, that will write to that memory space the info in
|
||||
the input buffer.
|
||||
|
||||
@param PacketData Pointer to Payload data for the packet
|
||||
**/
|
||||
VOID
|
||||
WriteToMemory (
|
||||
IN CHAR8 *PacketData
|
||||
);
|
||||
|
||||
|
||||
/** ‘c [addr ]’
|
||||
Continue. addr is Address to resume. If addr is omitted, resume at current
|
||||
Address.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param *PacketData Pointer to PacketData
|
||||
**/
|
||||
|
||||
VOID
|
||||
ContinueAtAddress (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
);
|
||||
|
||||
|
||||
/** ‘s [addr ]’
|
||||
Single step. addr is the Address at which to resume. If addr is omitted, resume
|
||||
at same Address.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param PacketData Pointer to Payload data for the packet
|
||||
**/
|
||||
VOID
|
||||
SingleStep (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
);
|
||||
|
||||
/**
|
||||
Insert Single Step in the SystemContext
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
**/
|
||||
VOID
|
||||
AddSingleStep (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext
|
||||
);
|
||||
|
||||
/**
|
||||
Remove Single Step in the SystemContext
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
**/
|
||||
VOID
|
||||
RemoveSingleStep (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
‘Z1, [addr], [length]’
|
||||
‘Z2, [addr], [length]’
|
||||
‘Z3, [addr], [length]’
|
||||
‘Z4, [addr], [length]’
|
||||
|
||||
Insert hardware breakpoint/watchpoint at address addr of size length
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param *PacketData Pointer to the Payload data for the packet
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InsertBreakPoint(
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
‘z1, [addr], [length]’
|
||||
‘z2, [addr], [length]’
|
||||
‘z3, [addr], [length]’
|
||||
‘z4, [addr], [length]’
|
||||
|
||||
Remove hardware breakpoint/watchpoint at address addr of size length
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param *PacketData Pointer to the Payload data for the packet
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
RemoveBreakPoint(
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Exception Hanldler for GDB. It will be called for all exceptions
|
||||
registered via the gExceptionType[] array.
|
||||
|
||||
@param ExceptionType Exception that is being processed
|
||||
@param SystemContext Register content at time of the exception
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
GdbExceptionHandler (
|
||||
IN EFI_EXCEPTION_TYPE ExceptionType,
|
||||
IN OUT EFI_SYSTEM_CONTEXT SystemContext
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Periodic callback for GDB. This function is used to catch a ctrl-c or other
|
||||
break in type command from GDB.
|
||||
|
||||
@param SystemContext Register content at time of the call
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
GdbPeriodicCallBack (
|
||||
IN OUT EFI_SYSTEM_CONTEXT SystemContext
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Make two serail consoles: 1) StdIn and StdOut via GDB. 2) StdErr via GDB.
|
||||
|
||||
These console show up on the remote system running GDB
|
||||
|
||||
**/
|
||||
|
||||
VOID
|
||||
GdbInitializeSerialConsole (
|
||||
VOID
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Send a GDB Remote Serial Protocol Packet
|
||||
|
||||
$PacketData#checksum PacketData is passed in and this function adds the packet prefix '$',
|
||||
the packet teminating character '#' and the two digit checksum.
|
||||
|
||||
If an ack '+' is not sent resend the packet, but timeout eventually so we don't end up
|
||||
in an infinit loop. This is so if you unplug the debugger code just keeps running
|
||||
|
||||
@param PacketData Payload data for the packet
|
||||
|
||||
@retval Number of bytes of packet data sent.
|
||||
|
||||
**/
|
||||
UINTN
|
||||
SendPacket (
|
||||
IN CHAR8 *PacketData
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Receive a GDB Remote Serial Protocol Packet
|
||||
|
||||
$PacketData#checksum PacketData is passed in and this function adds the packet prefix '$',
|
||||
the packet teminating character '#' and the two digit checksum.
|
||||
|
||||
If host re-starts sending a packet without ending the previous packet, only the last valid packet is processed.
|
||||
(In other words, if received packet is '$12345$12345$123456#checksum', only '$123456#checksum' will be processed.)
|
||||
|
||||
If an ack '+' is not sent resend the packet
|
||||
|
||||
@param PacketData Payload data for the packet
|
||||
|
||||
@retval Number of bytes of packet data received.
|
||||
|
||||
**/
|
||||
UINTN
|
||||
ReceivePacket (
|
||||
OUT CHAR8 *PacketData,
|
||||
IN UINTN PacketDataSize
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Read data from a FileDescriptor. On success number of bytes read is returned. Zero indicates
|
||||
the end of a file. On error -1 is returned. If count is zero, GdbRead returns zero.
|
||||
|
||||
@param FileDescriptor Device to talk to.
|
||||
@param Buffer Buffer to hold Count bytes that were read
|
||||
@param Count Number of bytes to transfer.
|
||||
|
||||
@retval -1 Error
|
||||
@retval {other} Number of bytes read.
|
||||
|
||||
**/
|
||||
INTN
|
||||
GdbRead (
|
||||
IN INTN FileDescriptor,
|
||||
OUT VOID *Buffer,
|
||||
IN UINTN Count
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Write data to a FileDescriptor. On success number of bytes written is returned. Zero indicates
|
||||
nothing was written. On error -1 is returned.
|
||||
|
||||
@param FileDescriptor Device to talk to.
|
||||
@param Buffer Buffer to hold Count bytes that are to be written
|
||||
@param Count Number of bytes to transfer.
|
||||
|
||||
@retval -1 Error
|
||||
@retval {other} Number of bytes written.
|
||||
|
||||
**/
|
||||
INTN
|
||||
GdbWrite (
|
||||
IN INTN FileDescriptor,
|
||||
OUT CONST VOID *Buffer,
|
||||
IN UINTN Count
|
||||
);
|
||||
|
||||
UINTN *
|
||||
FindPointerToRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN RegNumber
|
||||
);
|
||||
|
||||
CHAR8 *
|
||||
BasicReadRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN RegNumber,
|
||||
IN CHAR8 *OutBufPtr
|
||||
);
|
||||
|
||||
VOID
|
||||
TransferFromInBufToMem (
|
||||
IN UINTN Length,
|
||||
IN UINT8 *Address,
|
||||
IN CHAR8 *NewData
|
||||
);
|
||||
|
||||
VOID
|
||||
TransferFromMemToOutBufAndSend (
|
||||
IN UINTN Length,
|
||||
IN UINT8 *Address
|
||||
);
|
||||
|
||||
CHAR8 *
|
||||
BasicWriteRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN RegNumber,
|
||||
IN CHAR8 *InBufPtr
|
||||
);
|
||||
|
||||
VOID
|
||||
PrintReg (
|
||||
EFI_SYSTEM_CONTEXT SystemContext
|
||||
);
|
||||
|
||||
UINTN
|
||||
ParseBreakpointPacket (
|
||||
IN CHAR8 *PacketData,
|
||||
OUT UINTN *Type,
|
||||
OUT UINTN *Address,
|
||||
OUT UINTN *Length
|
||||
);
|
||||
|
||||
UINTN
|
||||
GetBreakpointDataAddress (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN BreakpointNumber
|
||||
);
|
||||
|
||||
UINTN
|
||||
GetBreakpointDetected (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext
|
||||
);
|
||||
|
||||
BREAK_TYPE
|
||||
GetBreakpointType (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN BreakpointNumber
|
||||
);
|
||||
|
||||
UINTN
|
||||
ConvertLengthData (
|
||||
IN UINTN Length
|
||||
);
|
||||
|
||||
EFI_STATUS
|
||||
FindNextFreeDebugRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
OUT UINTN *Register
|
||||
);
|
||||
|
||||
EFI_STATUS
|
||||
EnableDebugRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN Register,
|
||||
IN UINTN Address,
|
||||
IN UINTN Length,
|
||||
IN UINTN Type
|
||||
);
|
||||
|
||||
EFI_STATUS
|
||||
FindMatchingDebugRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN Address,
|
||||
IN UINTN Length,
|
||||
IN UINTN Type,
|
||||
OUT UINTN *Register
|
||||
);
|
||||
|
||||
EFI_STATUS
|
||||
DisableDebugRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN Register
|
||||
);
|
||||
|
||||
VOID
|
||||
InitializeProcessor (
|
||||
VOID
|
||||
);
|
||||
|
||||
/**
|
||||
Send the T signal with the given exception type (in gdb order) and possibly with n:r pairs related to the watchpoints
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param GdbExceptionType GDB exception type
|
||||
**/
|
||||
VOID
|
||||
ProcessorSendTSignal (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINT8 GdbExceptionType,
|
||||
IN OUT CHAR8 *TSignalPtr,
|
||||
IN UINTN SizeOfBuffer
|
||||
);
|
||||
|
||||
/**
|
||||
Check to see if this exception is related to ctrl-c handling.
|
||||
|
||||
@param ExceptionType Exception that is being processed
|
||||
@param SystemContext Register content at time of the exception
|
||||
|
||||
@return TRUE This was a ctrl-c check that did not find a ctrl-c
|
||||
@return FALSE This was not a ctrl-c check or some one hit ctrl-c
|
||||
**/
|
||||
BOOLEAN
|
||||
ProcessorControlC (
|
||||
IN EFI_EXCEPTION_TYPE ExceptionType,
|
||||
IN OUT EFI_SYSTEM_CONTEXT SystemContext
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Initialize debug agent.
|
||||
|
||||
This function is used to set up debug enviroment. It may enable interrupts.
|
||||
|
||||
@param[in] InitFlag Init flag is used to decide initialize process.
|
||||
@param[in] Context Context needed according to InitFlag, it was optional.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
DebugAgentHookExceptions (
|
||||
IN UINT32 InitFlag,
|
||||
IN VOID *Context OPTIONAL
|
||||
);
|
||||
|
||||
|
||||
#endif
|
||||
|
|
@ -1,70 +0,0 @@
|
|||
#/** @file
|
||||
# Null instance of Debug Agent Library with empty functions.
|
||||
#
|
||||
# Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
|
||||
#
|
||||
# This program and the accompanying materials
|
||||
# are licensed and made available under the terms and conditions of the BSD License
|
||||
# which accompanies this distribution. The full text of the license may be found at
|
||||
# http://opensource.org/licenses/bsd-license.php
|
||||
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
||||
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
||||
#
|
||||
#
|
||||
#**/
|
||||
|
||||
[Defines]
|
||||
INF_VERSION = 0x00010005
|
||||
BASE_NAME = GdbDebugAgent
|
||||
FILE_GUID = b9f10c17-6ca0-40b5-9b44-6253cfc7d24b
|
||||
MODULE_TYPE = BASE
|
||||
VERSION_STRING = 1.0
|
||||
LIBRARY_CLASS = DebugAgentLib
|
||||
|
||||
#
|
||||
# The following information is for reference only and not required by the build tools.
|
||||
#
|
||||
# VALID_ARCHITECTURES = IA32 X64 EBC
|
||||
#
|
||||
|
||||
[Sources.common]
|
||||
GdbDebugAgent.c
|
||||
|
||||
[Sources.arm]
|
||||
Arm/Processor.c
|
||||
Arm/ExceptionSupport.ARMv6.S
|
||||
Arm/ExceptionSupport.ARMv6.asm
|
||||
|
||||
[Sources.X64]
|
||||
Ia32/Processor.c
|
||||
|
||||
[Sources.Ia32]
|
||||
X64/Processor.c
|
||||
|
||||
|
||||
[Packages]
|
||||
MdePkg/MdePkg.dec
|
||||
MdeModulePkg/MdeModulePkg.dec
|
||||
EmbeddedPkg/EmbeddedPkg.dec
|
||||
|
||||
[Packages.arm]
|
||||
ArmPkg/ArmPkg.dec
|
||||
|
||||
[LibraryClasses]
|
||||
BaseLib
|
||||
DebugLib
|
||||
BaseMemoryLib
|
||||
PcdLib
|
||||
GdbSerialLib
|
||||
CacheMaintenanceLib
|
||||
DebugAgentTimerLib
|
||||
|
||||
[FeaturePcd.common]
|
||||
gEmbeddedTokenSpaceGuid.PcdGdbSerial
|
||||
|
||||
[FixedPcd.common]
|
||||
gEmbeddedTokenSpaceGuid.PcdGdbMaxPacketRetryCount
|
||||
gEmbeddedTokenSpaceGuid.PcdGdbTimerPeriodMilliseconds
|
||||
|
||||
[FixedPcd.arm]
|
||||
gArmTokenSpaceGuid.PcdCpuVectorBaseAddress
|
||||
|
|
@ -1,951 +0,0 @@
|
|||
/** @file
|
||||
Processor specific parts of the GDB stub
|
||||
|
||||
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
|
||||
|
||||
This program and the accompanying materials
|
||||
are licensed and made available under the terms and conditions of the BSD License
|
||||
which accompanies this distribution. The full text of the license may be found at
|
||||
http://opensource.org/licenses/bsd-license.php
|
||||
|
||||
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
||||
|
||||
**/
|
||||
|
||||
#include <GdbDebugAgent.h>
|
||||
|
||||
//
|
||||
// Array of exception types that need to be hooked by the debugger
|
||||
// {EFI mapping, GDB mapping}
|
||||
//
|
||||
EFI_EXCEPTION_TYPE_ENTRY gExceptionType[] = {
|
||||
{ EXCEPT_IA32_DIVIDE_ERROR, GDB_SIGFPE },
|
||||
{ EXCEPT_IA32_DEBUG, GDB_SIGTRAP },
|
||||
{ EXCEPT_IA32_NMI, GDB_SIGEMT },
|
||||
{ EXCEPT_IA32_BREAKPOINT, GDB_SIGTRAP },
|
||||
{ EXCEPT_IA32_OVERFLOW, GDB_SIGSEGV },
|
||||
{ EXCEPT_IA32_BOUND, GDB_SIGSEGV },
|
||||
{ EXCEPT_IA32_INVALID_OPCODE, GDB_SIGILL },
|
||||
{ EXCEPT_IA32_DOUBLE_FAULT, GDB_SIGEMT },
|
||||
{ EXCEPT_IA32_STACK_FAULT, GDB_SIGSEGV },
|
||||
{ EXCEPT_IA32_GP_FAULT, GDB_SIGSEGV },
|
||||
{ EXCEPT_IA32_PAGE_FAULT, GDB_SIGSEGV },
|
||||
{ EXCEPT_IA32_FP_ERROR, GDB_SIGEMT },
|
||||
{ EXCEPT_IA32_ALIGNMENT_CHECK, GDB_SIGEMT },
|
||||
{ EXCEPT_IA32_MACHINE_CHECK, GDB_SIGEMT }
|
||||
};
|
||||
|
||||
|
||||
// The offsets of registers SystemContext.
|
||||
// The fields in the array are in the gdb ordering.
|
||||
//
|
||||
//16 regs
|
||||
UINTN gRegisterOffsets[] = {
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Eax),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Ecx),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Edx),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Ebx),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Esp),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Ebp),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Esi),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Edi),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Eip),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Eflags),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Cs),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Ss),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Ds),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Es),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Fs),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Gs)
|
||||
};
|
||||
|
||||
|
||||
//Debug only..
|
||||
VOID
|
||||
PrintReg (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext
|
||||
)
|
||||
{
|
||||
Print ((CHAR16 *)L"EAX: %x ", SystemContext.SystemContextIa32->Eax);
|
||||
Print ((CHAR16 *)L"ECX: %x ", SystemContext.SystemContextIa32->Ecx);
|
||||
Print ((CHAR16 *)L"EDX: %x ", SystemContext.SystemContextIa32->Edx);
|
||||
Print ((CHAR16 *)L"EBX: %x ", SystemContext.SystemContextIa32->Ebx);
|
||||
Print ((CHAR16 *)L"ESP: %x ", SystemContext.SystemContextIa32->Esp);
|
||||
Print ((CHAR16 *)L"EBP: %x ", SystemContext.SystemContextIa32->Ebp);
|
||||
Print ((CHAR16 *)L"ESI: %x ", SystemContext.SystemContextIa32->Esi);
|
||||
Print ((CHAR16 *)L"EDI: %x ", SystemContext.SystemContextIa32->Edi);
|
||||
Print ((CHAR16 *)L"EIP: %x\n", SystemContext.SystemContextIa32->Eip);
|
||||
Print ((CHAR16 *)L"EFlags: %x\n", SystemContext.SystemContextIa32->Eflags);
|
||||
}
|
||||
|
||||
//Debug only..
|
||||
VOID
|
||||
PrintDRreg (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext
|
||||
)
|
||||
{
|
||||
Print ((CHAR16 *)L"DR0: %x ", SystemContext.SystemContextIa32->Dr0);
|
||||
Print ((CHAR16 *)L"DR1: %x ", SystemContext.SystemContextIa32->Dr1);
|
||||
Print ((CHAR16 *)L"DR2: %x ", SystemContext.SystemContextIa32->Dr2);
|
||||
Print ((CHAR16 *)L"DR3: %x ", SystemContext.SystemContextIa32->Dr3);
|
||||
Print ((CHAR16 *)L"DR6: %x ", SystemContext.SystemContextIa32->Dr6);
|
||||
Print ((CHAR16 *)L"DR7: %x\n", SystemContext.SystemContextIa32->Dr7);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Return the number of entries in the gExceptionType[]
|
||||
|
||||
@retval UINTN, the number of entries in the gExceptionType[] array.
|
||||
**/
|
||||
UINTN
|
||||
MaxEfiException (
|
||||
VOID
|
||||
)
|
||||
{
|
||||
return sizeof (gExceptionType)/sizeof (EFI_EXCEPTION_TYPE_ENTRY);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Check to see if the ISA is supported.
|
||||
ISA = Instruction Set Architecture
|
||||
|
||||
@retval TRUE if Isa is supported,
|
||||
FALSE otherwise.
|
||||
**/
|
||||
BOOLEAN
|
||||
CheckIsa (
|
||||
IN EFI_INSTRUCTION_SET_ARCHITECTURE Isa
|
||||
)
|
||||
{
|
||||
return (BOOLEAN)(Isa == IsaIa32);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
This takes in the register number and the System Context, and returns a pointer to the RegNumber-th register in gdb ordering
|
||||
It is, by default, set to find the register pointer of the IA32 member
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param RegNumber The register to which we want to find a pointer
|
||||
@retval the pointer to the RegNumber-th pointer
|
||||
**/
|
||||
UINTN *
|
||||
FindPointerToRegister(
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN RegNumber
|
||||
)
|
||||
{
|
||||
UINT8 *TempPtr;
|
||||
TempPtr = ((UINT8 *)SystemContext.SystemContextIa32) + gRegisterOffsets[RegNumber];
|
||||
return (UINTN *)TempPtr;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Adds the RegNumber-th register's value to the output buffer, starting at the given OutBufPtr
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param RegNumber the number of the register that we want to read
|
||||
@param OutBufPtr pointer to the output buffer's end. the new data will be added from this point on.
|
||||
@retval the pointer to the next character of the output buffer that is available to be written on.
|
||||
**/
|
||||
CHAR8 *
|
||||
BasicReadRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN RegNumber,
|
||||
IN CHAR8 *OutBufPtr
|
||||
)
|
||||
{
|
||||
UINTN RegSize;
|
||||
|
||||
RegSize = 0;
|
||||
while (RegSize < REG_SIZE) {
|
||||
*OutBufPtr++ = mHexToStr[((*FindPointerToRegister(SystemContext, RegNumber) >> (RegSize+4)) & 0xf)];
|
||||
*OutBufPtr++ = mHexToStr[((*FindPointerToRegister(SystemContext, RegNumber) >> RegSize) & 0xf)];
|
||||
RegSize = RegSize + 8;
|
||||
}
|
||||
return OutBufPtr;
|
||||
}
|
||||
|
||||
|
||||
/** ‘p n’
|
||||
Reads the n-th register's value into an output buffer and sends it as a packet
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param InBuffer Pointer to the input buffer received from gdb server
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
ReadNthRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *InBuffer
|
||||
)
|
||||
{
|
||||
UINTN RegNumber;
|
||||
CHAR8 OutBuffer[9]; // 1 reg=8 hex chars, and the end '\0' (escape seq)
|
||||
CHAR8 *OutBufPtr; // pointer to the output buffer
|
||||
|
||||
RegNumber = AsciiStrHexToUintn (&InBuffer[1]);
|
||||
|
||||
if ((RegNumber < 0) || (RegNumber >= sizeof (gRegisterOffsets)/sizeof (UINTN))) {
|
||||
SendError (GDB_EINVALIDREGNUM);
|
||||
return;
|
||||
}
|
||||
|
||||
OutBufPtr = OutBuffer;
|
||||
OutBufPtr = BasicReadRegister(SystemContext, RegNumber, OutBufPtr);
|
||||
|
||||
*OutBufPtr = '\0'; // the end of the buffer
|
||||
SendPacket(OutBuffer);
|
||||
}
|
||||
|
||||
|
||||
/** ‘g’
|
||||
Reads the general registers into an output buffer and sends it as a packet
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
ReadGeneralRegisters (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext
|
||||
)
|
||||
{
|
||||
UINTN i;
|
||||
CHAR8 OutBuffer[129]; // 16 regs, 8 hex chars each, and the end '\0' (escape seq)
|
||||
CHAR8 *OutBufPtr; // pointer to the output buffer
|
||||
|
||||
OutBufPtr = OutBuffer;
|
||||
for(i = 0 ; i < sizeof (gRegisterOffsets)/sizeof (UINTN) ; i++) { // there are only 16 registers to read
|
||||
OutBufPtr = BasicReadRegister(SystemContext, i, OutBufPtr);
|
||||
}
|
||||
|
||||
*OutBufPtr = '\0'; // the end of the buffer
|
||||
SendPacket(OutBuffer);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Adds the RegNumber-th register's value to the output buffer, starting at the given OutBufPtr
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param RegNumber the number of the register that we want to write
|
||||
@param InBufPtr pointer to the output buffer. the new data will be extracted from the input buffer from this point on.
|
||||
@retval the pointer to the next character of the input buffer that can be used
|
||||
**/
|
||||
CHAR8 *
|
||||
BasicWriteRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN RegNumber,
|
||||
IN CHAR8 *InBufPtr
|
||||
)
|
||||
{
|
||||
UINTN RegSize;
|
||||
UINTN TempValue; // the value transferred from a hex char
|
||||
UINT32 NewValue; // the new value of the RegNumber-th Register
|
||||
|
||||
NewValue = 0;
|
||||
RegSize = 0;
|
||||
while (RegSize < REG_SIZE) {
|
||||
TempValue = HexCharToInt(*InBufPtr++);
|
||||
|
||||
if (TempValue < 0) {
|
||||
SendError (GDB_EBADMEMDATA);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
NewValue += (TempValue << (RegSize+4));
|
||||
TempValue = HexCharToInt(*InBufPtr++);
|
||||
|
||||
if (TempValue < 0) {
|
||||
SendError (GDB_EBADMEMDATA);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
NewValue += (TempValue << RegSize);
|
||||
RegSize = RegSize + 8;
|
||||
}
|
||||
*(FindPointerToRegister(SystemContext, RegNumber)) = NewValue;
|
||||
return InBufPtr;
|
||||
}
|
||||
|
||||
|
||||
/** ‘P n...=r...’
|
||||
Writes the new value of n-th register received into the input buffer to the n-th register
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param InBuffer Ponter to the input buffer received from gdb server
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
WriteNthRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *InBuffer
|
||||
)
|
||||
{
|
||||
UINTN RegNumber;
|
||||
CHAR8 RegNumBuffer[MAX_REG_NUM_BUF_SIZE]; // put the 'n..' part of the message into this array
|
||||
CHAR8 *RegNumBufPtr;
|
||||
CHAR8 *InBufPtr; // pointer to the input buffer
|
||||
|
||||
// find the register number to write
|
||||
InBufPtr = &InBuffer[1];
|
||||
RegNumBufPtr = RegNumBuffer;
|
||||
while (*InBufPtr != '=') {
|
||||
*RegNumBufPtr++ = *InBufPtr++;
|
||||
}
|
||||
*RegNumBufPtr = '\0';
|
||||
RegNumber = AsciiStrHexToUintn (RegNumBuffer);
|
||||
|
||||
// check if this is a valid Register Number
|
||||
if ((RegNumber < 0) || (RegNumber >= sizeof (gRegisterOffsets)/sizeof (UINTN))) {
|
||||
SendError (GDB_EINVALIDREGNUM);
|
||||
return;
|
||||
}
|
||||
InBufPtr++; // skips the '=' character
|
||||
BasicWriteRegister (SystemContext, RegNumber, InBufPtr);
|
||||
SendSuccess();
|
||||
}
|
||||
|
||||
|
||||
/** ‘G XX...’
|
||||
Writes the new values received into the input buffer to the general registers
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param InBuffer Pointer to the input buffer received from gdb server
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
WriteGeneralRegisters (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *InBuffer
|
||||
)
|
||||
{
|
||||
UINTN i;
|
||||
CHAR8 *InBufPtr; /// pointer to the input buffer
|
||||
|
||||
// check to see if the buffer is the right size which is
|
||||
// 1 (for 'G') + 16 (for 16 registers) * 8 ( for 8 hex chars each) = 129
|
||||
if (AsciiStrLen(InBuffer) != 129) { // 16 regs, 8 hex chars each, and the end '\0' (escape seq)
|
||||
//Bad message. Message is not the right length
|
||||
SendError (GDB_EBADBUFSIZE);
|
||||
return;
|
||||
}
|
||||
|
||||
InBufPtr = &InBuffer[1];
|
||||
|
||||
// Read the new values for the registers from the input buffer to an array, NewValueArray.
|
||||
// The values in the array are in the gdb ordering
|
||||
for(i=0; i < sizeof (gRegisterOffsets)/sizeof (UINTN); i++) { // there are only 16 registers to write
|
||||
InBufPtr = BasicWriteRegister(SystemContext, i, InBufPtr);
|
||||
}
|
||||
|
||||
SendSuccess();
|
||||
}
|
||||
|
||||
/** ‘c [addr ]’
|
||||
Continue. addr is Address to resume. If addr is omitted, resume at current
|
||||
Address.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
ContinueAtAddress (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
)
|
||||
{
|
||||
if (PacketData[1] != '\0') {
|
||||
SystemContext.SystemContextIa32->Eip = AsciiStrHexToUintn (&PacketData[1]);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/** ‘s [addr ]’
|
||||
Single step. addr is the Address at which to resume. If addr is omitted, resume
|
||||
at same Address.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
SingleStep (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
)
|
||||
{
|
||||
SendNotSupported();
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Returns breakpoint data address from DR0-DR3 based on the input breakpoint number
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param BreakpointNumber Breakpoint number
|
||||
|
||||
@retval Address Data address from DR0-DR3 based on the breakpoint number.
|
||||
|
||||
**/
|
||||
UINTN
|
||||
GetBreakpointDataAddress (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN BreakpointNumber
|
||||
)
|
||||
{
|
||||
UINTN Address;
|
||||
|
||||
if (BreakpointNumber == 1) {
|
||||
Address = SystemContext.SystemContextIa32->Dr0;
|
||||
} else if (BreakpointNumber == 2) {
|
||||
Address = SystemContext.SystemContextIa32->Dr1;
|
||||
} else if (BreakpointNumber == 3) {
|
||||
Address = SystemContext.SystemContextIa32->Dr2;
|
||||
} else if (BreakpointNumber == 4) {
|
||||
Address = SystemContext.SystemContextIa32->Dr3;
|
||||
} else {
|
||||
Address = 0;
|
||||
}
|
||||
|
||||
return Address;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Returns currently detected breakpoint value based on the register DR6 B0-B3 field.
|
||||
If no breakpoint is detected then it returns 0.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
|
||||
@retval {1-4} Currently detected breakpoint value
|
||||
@retval 0 No breakpoint detected.
|
||||
|
||||
**/
|
||||
UINTN
|
||||
GetBreakpointDetected (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext
|
||||
)
|
||||
{
|
||||
IA32_DR6 Dr6;
|
||||
UINTN BreakpointNumber;
|
||||
|
||||
Dr6.UintN = SystemContext.SystemContextIa32->Dr6;
|
||||
|
||||
if (Dr6.Bits.B0 == 1) {
|
||||
BreakpointNumber = 1;
|
||||
} else if (Dr6.Bits.B1 == 1) {
|
||||
BreakpointNumber = 2;
|
||||
} else if (Dr6.Bits.B2 == 1) {
|
||||
BreakpointNumber = 3;
|
||||
} else if (Dr6.Bits.B3 == 1) {
|
||||
BreakpointNumber = 4;
|
||||
} else {
|
||||
BreakpointNumber = 0; //No breakpoint detected
|
||||
}
|
||||
|
||||
return BreakpointNumber;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Returns Breakpoint type (InstructionExecution, DataWrite, DataRead or DataReadWrite)
|
||||
based on the Breakpoint number
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param BreakpointNumber Breakpoint number
|
||||
|
||||
@retval BREAK_TYPE Breakpoint type value read from register DR7 RWn field
|
||||
For unknown value, it returns NotSupported.
|
||||
|
||||
**/
|
||||
BREAK_TYPE
|
||||
GetBreakpointType (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN BreakpointNumber
|
||||
)
|
||||
{
|
||||
IA32_DR7 Dr7;
|
||||
BREAK_TYPE Type = NotSupported; //Default is NotSupported type
|
||||
|
||||
Dr7.UintN = SystemContext.SystemContextIa32->Dr7;
|
||||
|
||||
if (BreakpointNumber == 1) {
|
||||
Type = (BREAK_TYPE) Dr7.Bits.RW0;
|
||||
} else if (BreakpointNumber == 2) {
|
||||
Type = (BREAK_TYPE) Dr7.Bits.RW1;
|
||||
} else if (BreakpointNumber == 3) {
|
||||
Type = (BREAK_TYPE) Dr7.Bits.RW2;
|
||||
} else if (BreakpointNumber == 4) {
|
||||
Type = (BREAK_TYPE) Dr7.Bits.RW3;
|
||||
}
|
||||
|
||||
return Type;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Parses Length and returns the length which DR7 LENn field accepts.
|
||||
For example: If we receive 1-Byte length then we should return 0.
|
||||
Zero gets written to DR7 LENn field.
|
||||
|
||||
@param Length Breakpoint length in Bytes (1 byte, 2 byte, 4 byte)
|
||||
|
||||
@retval Length Appropriate converted values which DR7 LENn field accepts.
|
||||
|
||||
**/
|
||||
UINTN
|
||||
ConvertLengthData (
|
||||
IN UINTN Length
|
||||
)
|
||||
{
|
||||
if (Length == 1) { //1-Byte length
|
||||
return 0;
|
||||
} else if (Length == 2) { //2-Byte length
|
||||
return 1;
|
||||
} else if (Length == 4) { //4-Byte length
|
||||
return 3;
|
||||
} else { //Undefined or 8-byte length
|
||||
return 2;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Finds the next free debug register. If all the registers are occupied then
|
||||
EFI_OUT_OF_RESOURCES is returned.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param Register Register value (0 - 3 for the first free debug register)
|
||||
|
||||
@retval EFI_STATUS Appropriate status value.
|
||||
|
||||
**/
|
||||
EFI_STATUS
|
||||
FindNextFreeDebugRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
OUT UINTN *Register
|
||||
)
|
||||
{
|
||||
IA32_DR7 Dr7;
|
||||
|
||||
Dr7.UintN = SystemContext.SystemContextIa32->Dr7;
|
||||
|
||||
if (Dr7.Bits.G0 == 0) {
|
||||
*Register = 0;
|
||||
} else if (Dr7.Bits.G1 == 0) {
|
||||
*Register = 1;
|
||||
} else if (Dr7.Bits.G2 == 0) {
|
||||
*Register = 2;
|
||||
} else if (Dr7.Bits.G3 == 0) {
|
||||
*Register = 3;
|
||||
} else {
|
||||
return EFI_OUT_OF_RESOURCES;
|
||||
}
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Enables the debug register. Writes Address value to appropriate DR0-3 register.
|
||||
Sets LENn, Gn, RWn bits in DR7 register.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param Register Register value (0 - 3)
|
||||
@param Address Breakpoint address value
|
||||
@param Type Breakpoint type (Instruction, Data write, Data read
|
||||
or write etc.)
|
||||
|
||||
@retval EFI_STATUS Appropriate status value.
|
||||
|
||||
**/
|
||||
EFI_STATUS
|
||||
EnableDebugRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN Register,
|
||||
IN UINTN Address,
|
||||
IN UINTN Length,
|
||||
IN UINTN Type
|
||||
)
|
||||
{
|
||||
IA32_DR7 Dr7;
|
||||
|
||||
//Convert length data
|
||||
Length = ConvertLengthData (Length);
|
||||
|
||||
//For Instruction execution, length should be 0
|
||||
//(Ref. Intel reference manual 18.2.4)
|
||||
if ((Type == 0) && (Length != 0)) {
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
//Hardware doesn't support ReadWatch (z3 packet) type. GDB can handle
|
||||
//software breakpoint. We should send empty packet in both these cases.
|
||||
if ((Type == (BREAK_TYPE)DataRead) ||
|
||||
(Type == (BREAK_TYPE)SoftwareBreakpoint)) {
|
||||
return EFI_UNSUPPORTED;
|
||||
}
|
||||
|
||||
//Read DR7 so appropriate Gn, RWn and LENn bits can be modified.
|
||||
Dr7.UintN = SystemContext.SystemContextIa32->Dr7;
|
||||
|
||||
if (Register == 0) {
|
||||
SystemContext.SystemContextIa32->Dr0 = Address;
|
||||
Dr7.Bits.G0 = 1;
|
||||
Dr7.Bits.RW0 = Type;
|
||||
Dr7.Bits.LEN0 = Length;
|
||||
} else if (Register == 1) {
|
||||
SystemContext.SystemContextIa32->Dr1 = Address;
|
||||
Dr7.Bits.G1 = 1;
|
||||
Dr7.Bits.RW1 = Type;
|
||||
Dr7.Bits.LEN1 = Length;
|
||||
} else if (Register == 2) {
|
||||
SystemContext.SystemContextIa32->Dr2 = Address;
|
||||
Dr7.Bits.G2 = 1;
|
||||
Dr7.Bits.RW2 = Type;
|
||||
Dr7.Bits.LEN2 = Length;
|
||||
} else if (Register == 3) {
|
||||
SystemContext.SystemContextIa32->Dr3 = Address;
|
||||
Dr7.Bits.G3 = 1;
|
||||
Dr7.Bits.RW3 = Type;
|
||||
Dr7.Bits.LEN3 = Length;
|
||||
} else {
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
//Update Dr7 with appropriate Gn, RWn and LENn bits
|
||||
SystemContext.SystemContextIa32->Dr7 = Dr7.UintN;
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Returns register number 0 - 3 for the maching debug register.
|
||||
This function compares incoming Address, Type, Length and
|
||||
if there is a match then it returns the appropriate register number.
|
||||
In case of mismatch, function returns EFI_NOT_FOUND message.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param Address Breakpoint address value
|
||||
@param Length Breakpoint length value
|
||||
@param Type Breakpoint type (Instruction, Data write,
|
||||
Data read or write etc.)
|
||||
@param Register Register value to be returned
|
||||
|
||||
@retval EFI_STATUS Appropriate status value.
|
||||
|
||||
**/
|
||||
EFI_STATUS
|
||||
FindMatchingDebugRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN Address,
|
||||
IN UINTN Length,
|
||||
IN UINTN Type,
|
||||
OUT UINTN *Register
|
||||
)
|
||||
{
|
||||
IA32_DR7 Dr7;
|
||||
|
||||
//Hardware doesn't support ReadWatch (z3 packet) type. GDB can handle
|
||||
//software breakpoint. We should send empty packet in both these cases.
|
||||
if ((Type == (BREAK_TYPE)DataRead) ||
|
||||
(Type == (BREAK_TYPE)SoftwareBreakpoint)) {
|
||||
return EFI_UNSUPPORTED;
|
||||
}
|
||||
|
||||
//Convert length data
|
||||
Length = ConvertLengthData(Length);
|
||||
|
||||
Dr7.UintN = SystemContext.SystemContextIa32->Dr7;
|
||||
|
||||
if ((Dr7.Bits.G0 == 1) &&
|
||||
(Dr7.Bits.LEN0 == Length) &&
|
||||
(Dr7.Bits.RW0 == Type) &&
|
||||
(Address == SystemContext.SystemContextIa32->Dr0)) {
|
||||
*Register = 0;
|
||||
} else if ((Dr7.Bits.G1 == 1) &&
|
||||
(Dr7.Bits.LEN1 == Length) &&
|
||||
(Dr7.Bits.RW1 == Type) &&
|
||||
(Address == SystemContext.SystemContextIa32->Dr1)) {
|
||||
*Register = 1;
|
||||
} else if ((Dr7.Bits.G2 == 1) &&
|
||||
(Dr7.Bits.LEN2 == Length) &&
|
||||
(Dr7.Bits.RW2 == Type) &&
|
||||
(Address == SystemContext.SystemContextIa32->Dr2)) {
|
||||
*Register = 2;
|
||||
} else if ((Dr7.Bits.G3 == 1) &&
|
||||
(Dr7.Bits.LEN3 == Length) &&
|
||||
(Dr7.Bits.RW3 == Type) &&
|
||||
(Address == SystemContext.SystemContextIa32->Dr3)) {
|
||||
*Register = 3;
|
||||
} else {
|
||||
Print ((CHAR16 *)L"No match found..\n");
|
||||
return EFI_NOT_FOUND;
|
||||
}
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Disables the particular debug register.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param Register Register to be disabled
|
||||
|
||||
@retval EFI_STATUS Appropriate status value.
|
||||
|
||||
**/
|
||||
EFI_STATUS
|
||||
DisableDebugRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN Register
|
||||
)
|
||||
{
|
||||
IA32_DR7 Dr7;
|
||||
UINTN Address = 0;
|
||||
|
||||
//Read DR7 register so appropriate Gn, RWn and LENn bits can be turned off.
|
||||
Dr7.UintN = SystemContext.SystemContextIa32->Dr7;
|
||||
|
||||
if (Register == 0) {
|
||||
SystemContext.SystemContextIa32->Dr0 = Address;
|
||||
Dr7.Bits.G0 = 0;
|
||||
Dr7.Bits.RW0 = 0;
|
||||
Dr7.Bits.LEN0 = 0;
|
||||
} else if (Register == 1) {
|
||||
SystemContext.SystemContextIa32->Dr1 = Address;
|
||||
Dr7.Bits.G1 = 0;
|
||||
Dr7.Bits.RW1 = 0;
|
||||
Dr7.Bits.LEN1 = 0;
|
||||
} else if (Register == 2) {
|
||||
SystemContext.SystemContextIa32->Dr2 = Address;
|
||||
Dr7.Bits.G2 = 0;
|
||||
Dr7.Bits.RW2 = 0;
|
||||
Dr7.Bits.LEN2 = 0;
|
||||
} else if (Register == 3) {
|
||||
SystemContext.SystemContextIa32->Dr3 = Address;
|
||||
Dr7.Bits.G3 = 0;
|
||||
Dr7.Bits.RW3 = 0;
|
||||
Dr7.Bits.LEN3 = 0;
|
||||
} else {
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
//Update DR7 register so appropriate Gn, RWn and LENn bits can be turned off.
|
||||
SystemContext.SystemContextIa32->Dr7 = Dr7.UintN;
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
‘Z1, [addr], [length]’
|
||||
‘Z2, [addr], [length]’
|
||||
‘Z3, [addr], [length]’
|
||||
‘Z4, [addr], [length]’
|
||||
|
||||
Insert hardware breakpoint/watchpoint at address addr of size length
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param *PacketData Pointer to the Payload data for the packet
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InsertBreakPoint (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
)
|
||||
{
|
||||
UINTN Type;
|
||||
UINTN Address;
|
||||
UINTN Length;
|
||||
UINTN Register;
|
||||
EFI_STATUS Status;
|
||||
BREAK_TYPE BreakType = NotSupported;
|
||||
UINTN ErrorCode;
|
||||
|
||||
ErrorCode = ParseBreakpointPacket (PacketData, &Type, &Address, &Length);
|
||||
if (ErrorCode > 0) {
|
||||
SendError ((UINT8)ErrorCode);
|
||||
return;
|
||||
}
|
||||
|
||||
switch (Type) {
|
||||
|
||||
case 0: //Software breakpoint
|
||||
BreakType = SoftwareBreakpoint;
|
||||
break;
|
||||
|
||||
case 1: //Hardware breakpoint
|
||||
BreakType = InstructionExecution;
|
||||
break;
|
||||
|
||||
case 2: //Write watchpoint
|
||||
BreakType = DataWrite;
|
||||
break;
|
||||
|
||||
case 3: //Read watchpoint
|
||||
BreakType = DataRead;
|
||||
break;
|
||||
|
||||
case 4: //Access watchpoint
|
||||
BreakType = DataReadWrite;
|
||||
break;
|
||||
|
||||
default :
|
||||
Print ((CHAR16 *)L"Insert breakpoint default: %x\n", Type);
|
||||
SendError (GDB_EINVALIDBRKPOINTTYPE);
|
||||
return;
|
||||
}
|
||||
|
||||
// Find next free debug register
|
||||
Status = FindNextFreeDebugRegister (SystemContext, &Register);
|
||||
if (EFI_ERROR(Status)) {
|
||||
Print ((CHAR16 *)L"No space left on device\n");
|
||||
SendError (GDB_ENOSPACE);
|
||||
return;
|
||||
}
|
||||
|
||||
// Write Address, length data at particular DR register
|
||||
Status = EnableDebugRegister (SystemContext, Register, Address, Length, (UINTN)BreakType);
|
||||
if (EFI_ERROR(Status)) {
|
||||
if (Status == EFI_UNSUPPORTED) {
|
||||
SendNotSupported();
|
||||
return;
|
||||
}
|
||||
|
||||
SendError (GDB_EINVALIDARG);
|
||||
return;
|
||||
}
|
||||
|
||||
SendSuccess ();
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
‘z1, [addr], [length]’
|
||||
‘z2, [addr], [length]’
|
||||
‘z3, [addr], [length]’
|
||||
‘z4, [addr], [length]’
|
||||
|
||||
Remove hardware breakpoint/watchpoint at address addr of size length
|
||||
|
||||
@param *PacketData Pointer to the Payload data for the packet
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
RemoveBreakPoint (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
)
|
||||
{
|
||||
UINTN Type;
|
||||
UINTN Address;
|
||||
UINTN Length;
|
||||
UINTN Register;
|
||||
BREAK_TYPE BreakType = NotSupported;
|
||||
EFI_STATUS Status;
|
||||
UINTN ErrorCode;
|
||||
|
||||
//Parse breakpoint packet data
|
||||
ErrorCode = ParseBreakpointPacket (PacketData, &Type, &Address, &Length);
|
||||
if (ErrorCode > 0) {
|
||||
SendError ((UINT8)ErrorCode);
|
||||
return;
|
||||
}
|
||||
|
||||
switch (Type) {
|
||||
|
||||
case 0: //Software breakpoint
|
||||
BreakType = SoftwareBreakpoint;
|
||||
break;
|
||||
|
||||
case 1: //Hardware breakpoint
|
||||
BreakType = InstructionExecution;
|
||||
break;
|
||||
|
||||
case 2: //Write watchpoint
|
||||
BreakType = DataWrite;
|
||||
break;
|
||||
|
||||
case 3: //Read watchpoint
|
||||
BreakType = DataRead;
|
||||
break;
|
||||
|
||||
case 4: //Access watchpoint
|
||||
BreakType = DataReadWrite;
|
||||
break;
|
||||
|
||||
default :
|
||||
SendError (GDB_EINVALIDBRKPOINTTYPE);
|
||||
return;
|
||||
}
|
||||
|
||||
//Find matching debug register
|
||||
Status = FindMatchingDebugRegister (SystemContext, Address, Length, (UINTN)BreakType, &Register);
|
||||
if (EFI_ERROR(Status)) {
|
||||
if (Status == EFI_UNSUPPORTED) {
|
||||
SendNotSupported();
|
||||
return;
|
||||
}
|
||||
|
||||
SendError (GDB_ENOSPACE);
|
||||
return;
|
||||
}
|
||||
|
||||
//Remove breakpoint
|
||||
Status = DisableDebugRegister(SystemContext, Register);
|
||||
if (EFI_ERROR(Status)) {
|
||||
SendError (GDB_EINVALIDARG);
|
||||
return;
|
||||
}
|
||||
|
||||
SendSuccess ();
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Initialize debug agent.
|
||||
|
||||
This function is used to set up debug environment to support source level debugging.
|
||||
If certain Debug Agent Library instance has to save some private data in the stack,
|
||||
this function must work on the mode that doesn't return to the caller, then
|
||||
the caller needs to wrap up all rest of logic after InitializeDebugAgent() into one
|
||||
function and pass it into InitializeDebugAgent(). InitializeDebugAgent() is
|
||||
responsible to invoke the passing-in function at the end of InitializeDebugAgent().
|
||||
|
||||
If the parameter Function is not NULL, Debug Agent Library instance will invoke it by
|
||||
passing in the Context to be its parameter.
|
||||
|
||||
If Function() is NULL, Debug Agent Library instance will return after setup debug
|
||||
environment.
|
||||
|
||||
@param[in] InitFlag Init flag is used to decide the initialize process.
|
||||
@param[in] Context Context needed according to InitFlag; it was optional.
|
||||
@param[in] Function Continue function called by debug agent library; it was
|
||||
optional.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InitializeDebugAgent (
|
||||
IN UINT32 InitFlag,
|
||||
IN VOID *Context, OPTIONAL
|
||||
IN DEBUG_AGENT_CONTINUE Function OPTIONAL
|
||||
)
|
||||
{
|
||||
// BugBug: Add the code to build an GDT/IDT
|
||||
|
||||
if (Function != NULL) {
|
||||
Function (Context);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -1,963 +0,0 @@
|
|||
/** @file
|
||||
Processor specific parts of the GDB stub
|
||||
|
||||
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
|
||||
|
||||
This program and the accompanying materials
|
||||
are licensed and made available under the terms and conditions of the BSD License
|
||||
which accompanies this distribution. The full text of the license may be found at
|
||||
http://opensource.org/licenses/bsd-license.php
|
||||
|
||||
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
||||
|
||||
**/
|
||||
|
||||
#include <GdbStubInternal.h>
|
||||
|
||||
//
|
||||
// Array of exception types that need to be hooked by the debugger
|
||||
//
|
||||
EFI_EXCEPTION_TYPE_ENTRY gExceptionType[] = {
|
||||
{ EXCEPT_X64_DIVIDE_ERROR, GDB_SIGFPE },
|
||||
{ EXCEPT_X64_DEBUG, GDB_SIGTRAP },
|
||||
{ EXCEPT_X64_NMI, GDB_SIGEMT },
|
||||
{ EXCEPT_X64_BREAKPOINT, GDB_SIGTRAP },
|
||||
{ EXCEPT_X64_OVERFLOW, GDB_SIGSEGV },
|
||||
{ EXCEPT_X64_BOUND, GDB_SIGSEGV },
|
||||
{ EXCEPT_X64_INVALID_OPCODE, GDB_SIGILL },
|
||||
{ EXCEPT_X64_DOUBLE_FAULT, GDB_SIGEMT },
|
||||
{ EXCEPT_X64_STACK_FAULT, GDB_SIGSEGV },
|
||||
{ EXCEPT_X64_GP_FAULT, GDB_SIGSEGV },
|
||||
{ EXCEPT_X64_PAGE_FAULT, GDB_SIGSEGV },
|
||||
{ EXCEPT_X64_FP_ERROR, GDB_SIGEMT },
|
||||
{ EXCEPT_X64_ALIGNMENT_CHECK, GDB_SIGEMT },
|
||||
{ EXCEPT_X64_MACHINE_CHECK, GDB_SIGEMT }
|
||||
};
|
||||
|
||||
|
||||
// The offsets of registers SystemContextX64.
|
||||
// The fields in the array are in the gdb ordering.
|
||||
// HAVE TO DOUBLE-CHECK THE ORDER of the 24 regs
|
||||
//
|
||||
UINTN gRegisterOffsets[] = {
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Rax),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Rcx),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Rdx),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Rbx),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Rsp),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Rbp),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Rsi),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Rdi),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Rip),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Rflags),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Cs),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Ss),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Ds),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Es),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Fs),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, Gs),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, R8),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, R9),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, R10),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, R11),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, R12),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, R13),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, R14),
|
||||
OFFSET_OF(EFI_SYSTEM_CONTEXT_X64, R15)
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
Return the number of entries in the gExceptionType[]
|
||||
|
||||
@retval UINTN, the number of entries in the gExceptionType[] array.
|
||||
**/
|
||||
UINTN
|
||||
MaxEfiException (
|
||||
VOID
|
||||
)
|
||||
{
|
||||
return sizeof (gExceptionType)/sizeof (EFI_EXCEPTION_TYPE_ENTRY);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Return the number of entries in the gRegisters[]
|
||||
|
||||
@retval UINTN, the number of entries (registers) in the gRegisters[] array.
|
||||
**/
|
||||
UINTN
|
||||
MaxRegisterCount (
|
||||
VOID
|
||||
)
|
||||
{
|
||||
return sizeof (gRegisterOffsets)/sizeof (UINTN);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Check to see if the ISA is supported.
|
||||
ISA = Instruction Set Architecture
|
||||
|
||||
@retval TRUE if Isa is supported
|
||||
**/
|
||||
BOOLEAN
|
||||
CheckIsa (
|
||||
IN EFI_INSTRUCTION_SET_ARCHITECTURE Isa
|
||||
)
|
||||
{
|
||||
return (BOOLEAN)(Isa == IsaX64);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
This takes in the register number and the System Context, and returns a pointer to the RegNumber-th register in gdb ordering
|
||||
It is, by default, set to find the register pointer of the X64 member
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param RegNumber The register to which we want to find a pointer
|
||||
@retval the pointer to the RegNumber-th pointer
|
||||
**/
|
||||
UINTN *
|
||||
FindPointerToRegister(
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN RegNumber
|
||||
)
|
||||
{
|
||||
UINT8 *TempPtr;
|
||||
TempPtr = ((UINT8 *)SystemContext.SystemContextX64) + gRegisterOffsets[RegNumber];
|
||||
return (UINTN *)TempPtr;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Adds the RegNumber-th register's value to the output buffer, starting at the given OutBufPtr
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param RegNumber the number of the register that we want to read
|
||||
@param OutBufPtr pointer to the output buffer's end. the new data will be added from this point on.
|
||||
@retval the pointer to the next character of the output buffer that is available to be written on.
|
||||
**/
|
||||
CHAR8 *
|
||||
BasicReadRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN RegNumber,
|
||||
IN CHAR8 *OutBufPtr
|
||||
)
|
||||
{
|
||||
UINTN RegSize;
|
||||
|
||||
RegSize = 0;
|
||||
while (RegSize < 64) {
|
||||
*OutBufPtr++ = mHexToStr[((*FindPointerToRegister(SystemContext, RegNumber) >> (RegSize+4)) & 0xf)];
|
||||
*OutBufPtr++ = mHexToStr[((*FindPointerToRegister(SystemContext, RegNumber) >> RegSize) & 0xf)];
|
||||
RegSize = RegSize + 8;
|
||||
}
|
||||
return OutBufPtr;
|
||||
}
|
||||
|
||||
|
||||
/** ‘p n’
|
||||
Reads the n-th register's value into an output buffer and sends it as a packet
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param InBuffer Pointer to the input buffer received from gdb server
|
||||
**/
|
||||
VOID
|
||||
ReadNthRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *InBuffer
|
||||
)
|
||||
{
|
||||
UINTN RegNumber;
|
||||
CHAR8 OutBuffer[17]; // 1 reg=16 hex chars, and the end '\0' (escape seq)
|
||||
CHAR8 *OutBufPtr; // pointer to the output buffer
|
||||
|
||||
RegNumber = AsciiStrHexToUintn (&InBuffer[1]);
|
||||
|
||||
if ((RegNumber < 0) || (RegNumber >= MaxRegisterCount())) {
|
||||
SendError (GDB_EINVALIDREGNUM);
|
||||
return;
|
||||
}
|
||||
|
||||
OutBufPtr = OutBuffer;
|
||||
OutBufPtr = BasicReadRegister(SystemContext, RegNumber, OutBufPtr);
|
||||
|
||||
*OutBufPtr = '\0'; // the end of the buffer
|
||||
SendPacket (OutBuffer);
|
||||
}
|
||||
|
||||
|
||||
/** ‘g’
|
||||
Reads the general registers into an output buffer and sends it as a packet
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
ReadGeneralRegisters (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext
|
||||
)
|
||||
{
|
||||
UINTN i;
|
||||
CHAR8 OutBuffer[385]; // 24 regs, 16 hex chars each, and the end '\0' (escape seq)
|
||||
CHAR8 *OutBufPtr; // pointer to the output buffer
|
||||
|
||||
OutBufPtr = OutBuffer;
|
||||
for(i = 0 ; i < MaxRegisterCount() ; i++) { // there are only 24 registers to read
|
||||
OutBufPtr = BasicReadRegister(SystemContext, i, OutBufPtr);
|
||||
}
|
||||
|
||||
*OutBufPtr = '\0'; // the end of the buffer
|
||||
SendPacket (OutBuffer);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Adds the RegNumber-th register's value to the output buffer, starting at the given OutBufPtr
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param RegNumber the number of the register that we want to write
|
||||
@param InBufPtr pointer to the output buffer. the new data will be extracted from the input buffer from this point on.
|
||||
@retval the pointer to the next character of the input buffer that can be used
|
||||
**/
|
||||
CHAR8 *
|
||||
BasicWriteRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN RegNumber,
|
||||
IN CHAR8 *InBufPtr
|
||||
)
|
||||
{
|
||||
UINTN RegSize;
|
||||
UINTN TempValue; // the value transferred from a hex char
|
||||
UINT64 NewValue; // the new value of the RegNumber-th Register
|
||||
|
||||
NewValue = 0;
|
||||
RegSize = 0;
|
||||
while (RegSize < 64) {
|
||||
TempValue = HexCharToInt(*InBufPtr++);
|
||||
|
||||
if (TempValue < 0) {
|
||||
SendError (GDB_EBADMEMDATA);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
NewValue += (TempValue << (RegSize+4));
|
||||
TempValue = HexCharToInt(*InBufPtr++);
|
||||
|
||||
if (TempValue < 0) {
|
||||
SendError (GDB_EBADMEMDATA);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
NewValue += (TempValue << RegSize);
|
||||
RegSize = RegSize + 8;
|
||||
}
|
||||
*(FindPointerToRegister(SystemContext, RegNumber)) = NewValue;
|
||||
return InBufPtr;
|
||||
}
|
||||
|
||||
|
||||
/** ‘P n...=r...’
|
||||
Writes the new value of n-th register received into the input buffer to the n-th register
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param InBuffer Ponter to the input buffer received from gdb server
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
WriteNthRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *InBuffer
|
||||
)
|
||||
{
|
||||
UINTN RegNumber;
|
||||
CHAR8 RegNumBuffer[MAX_REG_NUM_BUF_SIZE]; // put the 'n..' part of the message into this array
|
||||
CHAR8 *RegNumBufPtr;
|
||||
CHAR8 *InBufPtr; // pointer to the input buffer
|
||||
|
||||
// find the register number to write
|
||||
InBufPtr = &InBuffer[1];
|
||||
RegNumBufPtr = RegNumBuffer;
|
||||
while (*InBufPtr != '=') {
|
||||
*RegNumBufPtr++ = *InBufPtr++;
|
||||
}
|
||||
*RegNumBufPtr = '\0';
|
||||
RegNumber = AsciiStrHexToUintn (RegNumBuffer);
|
||||
|
||||
// check if this is a valid Register Number
|
||||
if ((RegNumber < 0) || (RegNumber >= MaxRegisterCount())) {
|
||||
SendError (GDB_EINVALIDREGNUM);
|
||||
return;
|
||||
}
|
||||
InBufPtr++; // skips the '=' character
|
||||
BasicWriteRegister (SystemContext, RegNumber, InBufPtr);
|
||||
SendSuccess();
|
||||
}
|
||||
|
||||
|
||||
/** ‘G XX...’
|
||||
Writes the new values received into the input buffer to the general registers
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param InBuffer Pointer to the input buffer received from gdb server
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
WriteGeneralRegisters (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *InBuffer
|
||||
)
|
||||
{
|
||||
UINTN i;
|
||||
CHAR8 *InBufPtr; /// pointer to the input buffer
|
||||
|
||||
// check to see if the buffer is the right size which is
|
||||
// 1 (for 'G') + 16 (for 16 registers) * 8 ( for 8 hex chars each) = 385
|
||||
if (AsciiStrLen(InBuffer) != 385) { // 24 regs, 16 hex chars each, and the end '\0' (escape seq)
|
||||
//Bad message. Message is not the right length
|
||||
SendError (GDB_EBADBUFSIZE);
|
||||
return;
|
||||
}
|
||||
|
||||
InBufPtr = &InBuffer[1];
|
||||
|
||||
// Read the new values for the registers from the input buffer to an array, NewValueArray.
|
||||
// The values in the array are in the gdb ordering
|
||||
for(i=0; i < MaxRegisterCount(); i++) { // there are only 16 registers to write
|
||||
InBufPtr = BasicWriteRegister(SystemContext, i, InBufPtr);
|
||||
}
|
||||
|
||||
SendSuccess();
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Insert Single Step in the SystemContext
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
**/
|
||||
VOID
|
||||
AddSingleStep (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext
|
||||
)
|
||||
{
|
||||
SystemContext.SystemContextX64->Rflags |= TF_BIT; //Setting the TF bit.
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
Remove Single Step in the SystemContext
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
**/
|
||||
VOID
|
||||
RemoveSingleStep (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext
|
||||
)
|
||||
{
|
||||
SystemContext.SystemContextX64->Rflags &= ~TF_BIT; // clearing the TF bit.
|
||||
}
|
||||
|
||||
|
||||
|
||||
/** ‘c [addr ]’
|
||||
Continue. addr is Address to resume. If addr is omitted, resume at current
|
||||
Address.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
ContinueAtAddress (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
)
|
||||
{
|
||||
if (PacketData[1] != '\0') {
|
||||
SystemContext.SystemContextX64->Rip = AsciiStrHexToUintn(&PacketData[1]);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/** ‘s [addr ]’
|
||||
Single step. addr is the Address at which to resume. If addr is omitted, resume
|
||||
at same Address.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
SingleStep (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
)
|
||||
{
|
||||
if (PacketData[1] != '\0') {
|
||||
SystemContext.SystemContextX64->Rip = AsciiStrHexToUintn (&PacketData[1]);
|
||||
}
|
||||
|
||||
AddSingleStep (SystemContext);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Returns breakpoint data address from DR0-DR3 based on the input breakpoint
|
||||
number
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param BreakpointNumber Breakpoint number
|
||||
|
||||
@retval Address Data address from DR0-DR3 based on the
|
||||
breakpoint number.
|
||||
|
||||
**/
|
||||
UINTN
|
||||
GetBreakpointDataAddress (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN BreakpointNumber
|
||||
)
|
||||
{
|
||||
UINTN Address;
|
||||
|
||||
if (BreakpointNumber == 1) {
|
||||
Address = SystemContext.SystemContextIa32->Dr0;
|
||||
} else if (BreakpointNumber == 2) {
|
||||
Address = SystemContext.SystemContextIa32->Dr1;
|
||||
} else if (BreakpointNumber == 3) {
|
||||
Address = SystemContext.SystemContextIa32->Dr2;
|
||||
} else if (BreakpointNumber == 4) {
|
||||
Address = SystemContext.SystemContextIa32->Dr3;
|
||||
} else {
|
||||
Address = 0;
|
||||
}
|
||||
|
||||
return Address;
|
||||
}
|
||||
|
||||
/**
|
||||
Returns currently detected breakpoint value based on the register
|
||||
DR6 B0-B3 field.
|
||||
If no breakpoint is detected then it returns 0.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
|
||||
@retval {1-4} Currently detected breakpoint value
|
||||
@retval 0 No breakpoint detected.
|
||||
|
||||
**/
|
||||
UINTN
|
||||
GetBreakpointDetected (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext
|
||||
)
|
||||
{
|
||||
IA32_DR6 Dr6;
|
||||
UINTN BreakpointNumber;
|
||||
|
||||
Dr6.UintN = SystemContext.SystemContextIa32->Dr6;
|
||||
|
||||
if (Dr6.Bits.B0 == 1) {
|
||||
BreakpointNumber = 1;
|
||||
} else if (Dr6.Bits.B1 == 1) {
|
||||
BreakpointNumber = 2;
|
||||
} else if (Dr6.Bits.B2 == 1) {
|
||||
BreakpointNumber = 3;
|
||||
} else if (Dr6.Bits.B3 == 1) {
|
||||
BreakpointNumber = 4;
|
||||
} else {
|
||||
BreakpointNumber = 0; //No breakpoint detected
|
||||
}
|
||||
|
||||
return BreakpointNumber;
|
||||
}
|
||||
|
||||
/**
|
||||
Returns Breakpoint type (InstructionExecution, DataWrite, DataRead
|
||||
or DataReadWrite) based on the Breakpoint number
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param BreakpointNumber Breakpoint number
|
||||
|
||||
@retval BREAK_TYPE Breakpoint type value read from register DR7 RWn
|
||||
field. For unknown value, it returns NotSupported.
|
||||
|
||||
**/
|
||||
BREAK_TYPE
|
||||
GetBreakpointType (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN BreakpointNumber
|
||||
)
|
||||
{
|
||||
IA32_DR7 Dr7;
|
||||
BREAK_TYPE Type = NotSupported; //Default is NotSupported type
|
||||
|
||||
Dr7.UintN = SystemContext.SystemContextIa32->Dr7;
|
||||
|
||||
if (BreakpointNumber == 1) {
|
||||
Type = (BREAK_TYPE) Dr7.Bits.RW0;
|
||||
} else if (BreakpointNumber == 2) {
|
||||
Type = (BREAK_TYPE) Dr7.Bits.RW1;
|
||||
} else if (BreakpointNumber == 3) {
|
||||
Type = (BREAK_TYPE) Dr7.Bits.RW2;
|
||||
} else if (BreakpointNumber == 4) {
|
||||
Type = (BREAK_TYPE) Dr7.Bits.RW3;
|
||||
}
|
||||
|
||||
return Type;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Parses Length and returns the length which DR7 LENn field accepts.
|
||||
For example: If we receive 1-Byte length then we should return 0.
|
||||
Zero gets written to DR7 LENn field.
|
||||
|
||||
@param Length Breakpoint length in Bytes (1 byte, 2 byte, 4 byte)
|
||||
|
||||
@retval Length Appropriate converted values which DR7 LENn field accepts.
|
||||
|
||||
**/
|
||||
UINTN
|
||||
ConvertLengthData (
|
||||
IN UINTN Length
|
||||
)
|
||||
{
|
||||
if (Length == 1) { //1-Byte length
|
||||
return 0;
|
||||
} else if (Length == 2) { //2-Byte length
|
||||
return 1;
|
||||
} else if (Length == 4) { //4-Byte length
|
||||
return 3;
|
||||
} else { //Undefined or 8-byte length
|
||||
return 2;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Finds the next free debug register. If all the registers are occupied then
|
||||
EFI_OUT_OF_RESOURCES is returned.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param Register Register value (0 - 3 for the first free debug register)
|
||||
|
||||
@retval EFI_STATUS Appropriate status value.
|
||||
|
||||
**/
|
||||
EFI_STATUS
|
||||
FindNextFreeDebugRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
OUT UINTN *Register
|
||||
)
|
||||
{
|
||||
IA32_DR7 Dr7;
|
||||
|
||||
Dr7.UintN = SystemContext.SystemContextIa32->Dr7;
|
||||
|
||||
if (Dr7.Bits.G0 == 0) {
|
||||
*Register = 0;
|
||||
} else if (Dr7.Bits.G1 == 0) {
|
||||
*Register = 1;
|
||||
} else if (Dr7.Bits.G2 == 0) {
|
||||
*Register = 2;
|
||||
} else if (Dr7.Bits.G3 == 0) {
|
||||
*Register = 3;
|
||||
} else {
|
||||
return EFI_OUT_OF_RESOURCES;
|
||||
}
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Enables the debug register. Writes Address value to appropriate DR0-3 register.
|
||||
Sets LENn, Gn, RWn bits in DR7 register.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param Register Register value (0 - 3)
|
||||
@param Address Breakpoint address value
|
||||
@param Type Breakpoint type (Instruction, Data write,
|
||||
Data read or write etc.)
|
||||
|
||||
@retval EFI_STATUS Appropriate status value.
|
||||
|
||||
**/
|
||||
EFI_STATUS
|
||||
EnableDebugRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN Register,
|
||||
IN UINTN Address,
|
||||
IN UINTN Length,
|
||||
IN UINTN Type
|
||||
)
|
||||
{
|
||||
IA32_DR7 Dr7;
|
||||
|
||||
//Convert length data
|
||||
Length = ConvertLengthData (Length);
|
||||
|
||||
//For Instruction execution, length should be 0
|
||||
//(Ref. Intel reference manual 18.2.4)
|
||||
if ((Type == 0) && (Length != 0)) {
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
//Hardware doesn't support ReadWatch (z3 packet) type. GDB can handle
|
||||
//software breakpoint. We should send empty packet in both these cases.
|
||||
if ((Type == (BREAK_TYPE)DataRead) ||
|
||||
(Type == (BREAK_TYPE)SoftwareBreakpoint)) {
|
||||
return EFI_UNSUPPORTED;
|
||||
}
|
||||
|
||||
//Read DR7 so appropriate Gn, RWn and LENn bits can be modified.
|
||||
Dr7.UintN = SystemContext.SystemContextIa32->Dr7;
|
||||
|
||||
if (Register == 0) {
|
||||
SystemContext.SystemContextIa32->Dr0 = Address;
|
||||
Dr7.Bits.G0 = 1;
|
||||
Dr7.Bits.RW0 = Type;
|
||||
Dr7.Bits.LEN0 = Length;
|
||||
} else if (Register == 1) {
|
||||
SystemContext.SystemContextIa32->Dr1 = Address;
|
||||
Dr7.Bits.G1 = 1;
|
||||
Dr7.Bits.RW1 = Type;
|
||||
Dr7.Bits.LEN1 = Length;
|
||||
} else if (Register == 2) {
|
||||
SystemContext.SystemContextIa32->Dr2 = Address;
|
||||
Dr7.Bits.G2 = 1;
|
||||
Dr7.Bits.RW2 = Type;
|
||||
Dr7.Bits.LEN2 = Length;
|
||||
} else if (Register == 3) {
|
||||
SystemContext.SystemContextIa32->Dr3 = Address;
|
||||
Dr7.Bits.G3 = 1;
|
||||
Dr7.Bits.RW3 = Type;
|
||||
Dr7.Bits.LEN3 = Length;
|
||||
} else {
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
//Update Dr7 with appropriate Gn, RWn and LENn bits
|
||||
SystemContext.SystemContextIa32->Dr7 = Dr7.UintN;
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Returns register number 0 - 3 for the maching debug register.
|
||||
This function compares incoming Address, Type, Length and
|
||||
if there is a match then it returns the appropriate register number.
|
||||
In case of mismatch, function returns EFI_NOT_FOUND message.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param Address Breakpoint address value
|
||||
@param Length Breakpoint length value
|
||||
@param Type Breakpoint type (Instruction, Data write, Data read
|
||||
or write etc.)
|
||||
@param Register Register value to be returned
|
||||
|
||||
@retval EFI_STATUS Appropriate status value.
|
||||
|
||||
**/
|
||||
EFI_STATUS
|
||||
FindMatchingDebugRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN Address,
|
||||
IN UINTN Length,
|
||||
IN UINTN Type,
|
||||
OUT UINTN *Register
|
||||
)
|
||||
{
|
||||
IA32_DR7 Dr7;
|
||||
|
||||
//Hardware doesn't support ReadWatch (z3 packet) type. GDB can handle
|
||||
//software breakpoint. We should send empty packet in both these cases.
|
||||
if ((Type == (BREAK_TYPE)DataRead) ||
|
||||
(Type == (BREAK_TYPE)SoftwareBreakpoint)) {
|
||||
return EFI_UNSUPPORTED;
|
||||
}
|
||||
|
||||
//Convert length data
|
||||
Length = ConvertLengthData(Length);
|
||||
|
||||
Dr7.UintN = SystemContext.SystemContextIa32->Dr7;
|
||||
|
||||
if ((Dr7.Bits.G0 == 1) &&
|
||||
(Dr7.Bits.LEN0 == Length) &&
|
||||
(Dr7.Bits.RW0 == Type) &&
|
||||
(Address == SystemContext.SystemContextIa32->Dr0)) {
|
||||
*Register = 0;
|
||||
} else if ((Dr7.Bits.G1 == 1) &&
|
||||
(Dr7.Bits.LEN1 == Length) &&
|
||||
(Dr7.Bits.RW1 == Type) &&
|
||||
(Address == SystemContext.SystemContextIa32->Dr1)) {
|
||||
*Register = 1;
|
||||
} else if ((Dr7.Bits.G2 == 1) &&
|
||||
(Dr7.Bits.LEN2 == Length) &&
|
||||
(Dr7.Bits.RW2 == Type) &&
|
||||
(Address == SystemContext.SystemContextIa32->Dr2)) {
|
||||
*Register = 2;
|
||||
} else if ((Dr7.Bits.G3 == 1) &&
|
||||
(Dr7.Bits.LEN3 == Length) &&
|
||||
(Dr7.Bits.RW3 == Type) &&
|
||||
(Address == SystemContext.SystemContextIa32->Dr3)) {
|
||||
*Register = 3;
|
||||
} else {
|
||||
Print ((CHAR16 *)L"No match found..\n");
|
||||
return EFI_NOT_FOUND;
|
||||
}
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Disables the particular debug register.
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param Register Register to be disabled
|
||||
|
||||
@retval EFI_STATUS Appropriate status value.
|
||||
|
||||
**/
|
||||
EFI_STATUS
|
||||
DisableDebugRegister (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN UINTN Register
|
||||
)
|
||||
{
|
||||
IA32_DR7 Dr7;
|
||||
UINTN Address = 0;
|
||||
|
||||
//Read DR7 register so appropriate Gn, RWn and LENn bits can be turned off.
|
||||
Dr7.UintN = SystemContext.SystemContextIa32->Dr7;
|
||||
|
||||
if (Register == 0) {
|
||||
SystemContext.SystemContextIa32->Dr0 = Address;
|
||||
Dr7.Bits.G0 = 0;
|
||||
Dr7.Bits.RW0 = 0;
|
||||
Dr7.Bits.LEN0 = 0;
|
||||
} else if (Register == 1) {
|
||||
SystemContext.SystemContextIa32->Dr1 = Address;
|
||||
Dr7.Bits.G1 = 0;
|
||||
Dr7.Bits.RW1 = 0;
|
||||
Dr7.Bits.LEN1 = 0;
|
||||
} else if (Register == 2) {
|
||||
SystemContext.SystemContextIa32->Dr2 = Address;
|
||||
Dr7.Bits.G2 = 0;
|
||||
Dr7.Bits.RW2 = 0;
|
||||
Dr7.Bits.LEN2 = 0;
|
||||
} else if (Register == 3) {
|
||||
SystemContext.SystemContextIa32->Dr3 = Address;
|
||||
Dr7.Bits.G3 = 0;
|
||||
Dr7.Bits.RW3 = 0;
|
||||
Dr7.Bits.LEN3 = 0;
|
||||
} else {
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
//Update DR7 register so appropriate Gn, RWn and LENn bits can be turned off.
|
||||
SystemContext.SystemContextIa32->Dr7 = Dr7.UintN;
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
‘Z1, [addr], [length]’
|
||||
‘Z2, [addr], [length]’
|
||||
‘Z3, [addr], [length]’
|
||||
‘Z4, [addr], [length]’
|
||||
|
||||
Insert hardware breakpoint/watchpoint at address addr of size length
|
||||
|
||||
@param SystemContext Register content at time of the exception
|
||||
@param *PacketData Pointer to the Payload data for the packet
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InsertBreakPoint (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
)
|
||||
{
|
||||
UINTN Type;
|
||||
UINTN Address;
|
||||
UINTN Length;
|
||||
UINTN Register;
|
||||
EFI_STATUS Status;
|
||||
BREAK_TYPE BreakType = NotSupported;
|
||||
UINTN ErrorCode;
|
||||
|
||||
ErrorCode = ParseBreakpointPacket (PacketData, &Type, &Address, &Length);
|
||||
if (ErrorCode > 0) {
|
||||
SendError ((UINT8)ErrorCode);
|
||||
return;
|
||||
}
|
||||
|
||||
switch (Type) {
|
||||
|
||||
case 0: //Software breakpoint
|
||||
BreakType = SoftwareBreakpoint;
|
||||
break;
|
||||
|
||||
case 1: //Hardware breakpoint
|
||||
BreakType = InstructionExecution;
|
||||
break;
|
||||
|
||||
case 2: //Write watchpoint
|
||||
BreakType = DataWrite;
|
||||
break;
|
||||
|
||||
case 3: //Read watchpoint
|
||||
BreakType = DataRead;
|
||||
break;
|
||||
|
||||
case 4: //Access watchpoint
|
||||
BreakType = DataReadWrite;
|
||||
break;
|
||||
|
||||
default :
|
||||
Print ((CHAR16 *)L"Insert breakpoint default: %x\n", Type);
|
||||
SendError (GDB_EINVALIDBRKPOINTTYPE);
|
||||
return;
|
||||
}
|
||||
|
||||
// Find next free debug register
|
||||
Status = FindNextFreeDebugRegister (SystemContext, &Register);
|
||||
if (EFI_ERROR(Status)) {
|
||||
Print ((CHAR16 *)L"No space left on device\n");
|
||||
SendError (GDB_ENOSPACE);
|
||||
return;
|
||||
}
|
||||
|
||||
// Write Address, length data at particular DR register
|
||||
Status = EnableDebugRegister (SystemContext, Register, Address, Length, (UINTN)BreakType);
|
||||
if (EFI_ERROR(Status)) {
|
||||
|
||||
if (Status == EFI_UNSUPPORTED) {
|
||||
Print ((CHAR16 *)L"Not supported\n");
|
||||
SendNotSupported();
|
||||
return;
|
||||
}
|
||||
|
||||
Print ((CHAR16 *)L"Invalid argument\n");
|
||||
SendError (GDB_EINVALIDARG);
|
||||
return;
|
||||
}
|
||||
|
||||
SendSuccess ();
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
‘z1, [addr], [length]’
|
||||
‘z2, [addr], [length]’
|
||||
‘z3, [addr], [length]’
|
||||
‘z4, [addr], [length]’
|
||||
|
||||
Remove hardware breakpoint/watchpoint at address addr of size length
|
||||
|
||||
@param *PacketData Pointer to the Payload data for the packet
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
RemoveBreakPoint (
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN CHAR8 *PacketData
|
||||
)
|
||||
{
|
||||
UINTN Type;
|
||||
UINTN Address;
|
||||
UINTN Length;
|
||||
UINTN Register;
|
||||
BREAK_TYPE BreakType = NotSupported;
|
||||
EFI_STATUS Status;
|
||||
UINTN ErrorCode;
|
||||
|
||||
//Parse breakpoint packet data
|
||||
ErrorCode = ParseBreakpointPacket (PacketData, &Type, &Address, &Length);
|
||||
if (ErrorCode > 0) {
|
||||
SendError ((UINT8)ErrorCode);
|
||||
return;
|
||||
}
|
||||
|
||||
switch (Type) {
|
||||
|
||||
case 0: //Software breakpoint
|
||||
BreakType = SoftwareBreakpoint;
|
||||
break;
|
||||
|
||||
case 1: //Hardware breakpoint
|
||||
BreakType = InstructionExecution;
|
||||
break;
|
||||
|
||||
case 2: //Write watchpoint
|
||||
BreakType = DataWrite;
|
||||
break;
|
||||
|
||||
case 3: //Read watchpoint
|
||||
BreakType = DataRead;
|
||||
break;
|
||||
|
||||
case 4: //Access watchpoint
|
||||
BreakType = DataReadWrite;
|
||||
break;
|
||||
|
||||
default :
|
||||
SendError (GDB_EINVALIDBRKPOINTTYPE);
|
||||
return;
|
||||
}
|
||||
|
||||
//Find matching debug register
|
||||
Status = FindMatchingDebugRegister (SystemContext, Address, Length, (UINTN)BreakType, &Register);
|
||||
if (EFI_ERROR(Status)) {
|
||||
|
||||
if (Status == EFI_UNSUPPORTED) {
|
||||
Print ((CHAR16 *)L"Not supported.\n");
|
||||
SendNotSupported();
|
||||
return;
|
||||
}
|
||||
|
||||
Print ((CHAR16 *)L"No matching register found.\n");
|
||||
SendError (GDB_ENOSPACE);
|
||||
return;
|
||||
}
|
||||
|
||||
//Remove breakpoint
|
||||
Status = DisableDebugRegister(SystemContext, Register);
|
||||
if (EFI_ERROR(Status)) {
|
||||
Print ((CHAR16 *)L"Invalid argument.\n");
|
||||
SendError (GDB_EINVALIDARG);
|
||||
return;
|
||||
}
|
||||
|
||||
SendSuccess ();
|
||||
}
|
||||
|
||||
|
||||
VOID
|
||||
InitializeProcessor (
|
||||
VOID
|
||||
)
|
||||
{
|
||||
}
|
||||
|
||||
BOOLEAN
|
||||
ValidateAddress (
|
||||
IN VOID *Address
|
||||
)
|
||||
{
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
BOOLEAN
|
||||
ValidateException (
|
||||
IN EFI_EXCEPTION_TYPE ExceptionType,
|
||||
IN OUT EFI_SYSTEM_CONTEXT SystemContext
|
||||
)
|
||||
{
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
|
|
@ -1,15 +0,0 @@
|
|||
arm-none-eabi-gcc -march=armv7-a -mthumb t.c -Wl,-nostdlib --emit-relocs
|
||||
|
||||
target remote com7
|
||||
set debug remote 1
|
||||
set remotetimeout 30
|
||||
set remotelogfile log.txt
|
||||
add-symbol-file c:/work/edk2/Build/BeagleBoard/DEBUG_GCC48/ARM/BeagleBoardPkg/Sec/Sec/DEBUG/BeagleBoardSec.dll 0x80008360
|
||||
|
||||
|
||||
qSupported
|
||||
Hg0
|
||||
|
||||
Hc-1
|
||||
qC
|
||||
qAttached
|
||||
Loading…
Reference in New Issue