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Ring3: Defined CallRing3() for ARM.

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This commit is contained in:
Mikhail Krichanov 2024-07-05 16:14:21 +03:00
parent 618149a40d
commit ae234e908f
4 changed files with 73 additions and 13 deletions
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12
MdeModulePkg/Core/Dxe/DxeRing3/ARM/SysCall.S
View File

@ -5,6 +5,8 @@
#include <AsmMacroIoLib.h>
.extern ASM_PFX(Ring3Call)
//------------------------------------------------------------------------------
// EFI_STATUS
// EFIAPI
@ -14,8 +16,8 @@
// );
//------------------------------------------------------------------------------
ASM_FUNC(SysCall)
bx LR
svc #0
bx LR
//------------------------------------------------------------------------------
// VOID
@ -24,9 +26,7 @@ ASM_FUNC(SysCall)
// IN RING3_CALL_DATA *Data
// );
//
// (rcx) RIP of Ring3EntryPoint saved for SYSRET in CallRing3().
// (rdx) Data
// (r0) Data
//------------------------------------------------------------------------------
ASM_FUNC(Ring3EntryPoint)
bx LR
b ASM_PFX(Ring3Call)

2
MdeModulePkg/Core/Dxe/SysCall/AARCH64/CoreBootServices.S
View File

@ -91,7 +91,7 @@ ASM_FUNC(ArmCallRing3)
// Prepare Ring3 SP and EntryPoint.
msr sp_el0, x1
msr elr_el1, x2
// Save Core SP and switch to Ring3Call Stack.
// Save Core SP and switch to CoreSysCall Stack.
mov x5, sp
str x5, [x4]
mov sp, x3

41
MdeModulePkg/Core/Dxe/SysCall/ARM/CoreBootServices.S
View File

@ -49,10 +49,45 @@ ASM_FUNC(CoreBootServices)
// IN RING3_CALL_DATA *Data
// );
//
// (rcx) Data
// (r0) Data
// (r1) gRing3CallStackTop
// (r2) gRing3EntryPoint
// (r3) gCoreSysCallStackTop
//
// (On Core Stack) &CoreSp
//------------------------------------------------------------------------------
ASM_FUNC(CallRing3)
bx LR
ASM_FUNC(ArmCallRing3)
// Save registers.
push {R4-R12, LR}
// R6 is &CoreSp
ldr R6, [SP, #0x28]
#if (FixedPcdGet32(PcdVFPEnabled))
// Save vstm registers in case they are used in optimizations.
vpush {d0-d15}
#endif
// Disable interrupts.
mrs R4, CPSR
orr R5, R4, #0x80
msr CPSR_c, R5
// Set SP_usr to gRing3CallStackTop.
push {R1}
mov R1, SP
ldmia R1, {SP}^
pop {R1}
// Set SPSR M[3:0] bits to User mode.
and R4, R4, #0xFFFFFFF0
// Save Core SP and switch to CoreSysCall Stack.
mov R5, SP
str R5, [R6]
mov SP, R3
push {R4}
push {R2}
rfefd SP
//------------------------------------------------------------------------------
// VOID

31
MdeModulePkg/Core/Dxe/SysCall/ARM/InitializeMsr.c
View File

@ -9,6 +9,18 @@
#include "DxeMain.h"
STATIC UINTN mCoreSp;
EFI_STATUS
EFIAPI
ArmCallRing3 (
IN RING3_CALL_DATA *Data,
IN VOID *StackPointer,
IN VOID *EntryPoint,
IN VOID *SysCallStack,
IN VOID *CoreStack
);
VOID
EFIAPI
ArmSetPan (
@ -35,7 +47,7 @@ InitializeMsr (
ArmSetPan ();
} else {
DEBUG ((DEBUG_ERROR, "Core: Failed to initialize MSRs for Ring3.\n"));
ASSERT (FALSE);
// ASSERT (FALSE);
}
}
@ -45,7 +57,9 @@ DisableSMAP (
VOID
)
{
ArmClearPan ();
if (ArmHasPan ()) {
ArmClearPan ();
}
}
VOID
@ -54,5 +68,16 @@ EnableSMAP (
VOID
)
{
ArmSetPan ();
if (ArmHasPan ()) {
ArmSetPan ();
}
}
EFI_STATUS
EFIAPI
CallRing3 (
IN RING3_CALL_DATA *Data
)
{
return ArmCallRing3 (Data, gRing3CallStackTop, gRing3EntryPoint, gCoreSysCallStackTop, &mCoreSp);
}