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Ring3: Defined CallRing3() for AARCH64.

This commit is contained in:
Mikhail Krichanov 2024-05-20 17:27:09 +03:00
parent 04c34b8135
commit 3fc05b0473
5 changed files with 60 additions and 7 deletions
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4
ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c
View File

@ -8,6 +8,8 @@
**/
#include <Chipset/AArch64.h>
#include <Uefi.h>
#include <Library/UefiLib.h>
#include <Library/BaseLib.h>
@ -233,6 +235,8 @@ DefaultExceptionHandler (
DEBUG ((DEBUG_ERROR, "PC 0x%012lx\n", SystemContext.SystemContextAArch64->ELR));
}
ArmClearPan ();
if ((UINT64 *)SystemContext.SystemContextAArch64->FP != 0) {
Idx = 0;

2
MdeModulePkg/Core/Dxe/DxeMain.h
View File

@ -276,6 +276,8 @@ extern VOID *gRing3Interfaces;
extern VOID *gCoreSysCallStackBase;
extern VOID *gCoreSysCallStackTop;
extern VOID *gRing3CallStackBase;
extern VOID *gRing3CallStackTop;
extern VOID *gRing3EntryPoint;
//
// Service Initialization Functions

8
MdeModulePkg/Core/Dxe/DxeRing3/AARCH64/SysCall.S
View File

@ -5,6 +5,8 @@
#include <AsmMacroIoLibV8.h>
.extern ASM_PFX(Ring3Call)
//------------------------------------------------------------------------------
// EFI_STATUS
// EFIAPI
@ -24,9 +26,7 @@ ASM_FUNC(SysCall)
// IN RING3_CALL_DATA *Data
// );
//
// (rcx) RIP of Ring3EntryPoint saved for SYSRET in CallRing3().
// (rdx) Data
// (x0) Data
//------------------------------------------------------------------------------
ASM_FUNC(Ring3EntryPoint)
ret
b ASM_PFX(Ring3Call)

36
MdeModulePkg/Core/Dxe/SysCall/AARCH64/CoreBootServices.S
View File

@ -47,7 +47,37 @@ ASM_FUNC(CoreBootServices)
// IN RING3_CALL_DATA *Data
// );
//
// (rcx) Data
// (x0) Data
// (x1) gRing3CallStackTop
// (x2) gRing3EntryPoint
//------------------------------------------------------------------------------
ASM_FUNC(CallRing3)
ret
ASM_FUNC(ArmCallRing3)
// Disable interrupts
msr daifset, #0xf
isb
// Use SP_ELx for Exception level ELx.
msr SPsel, #1
msr sp_el0, x1
msr elr_el1, x2
// Copy PSTATE to SPSR.
mrs x1, nzcv
mrs x2, pan
orr x1, x1, x2
mrs x2, daif
orr x1, x1, x2
//
// M[3:0], bits [3:0] AArch64 Exception level and selected Stack Pointer.
// 0b0000 - EL0.
// 0b0100 - EL1 with SP_EL0 (ELt).
// 0b0101 - EL1 with SP_EL1 (EL1h).
//
msr spsr_el1, x1
isb
dsb sy
eret

17
MdeModulePkg/Core/Dxe/SysCall/AARCH64/InitializeMsr.c
View File

@ -10,6 +10,14 @@
#include "DxeMain.h"
EFI_STATUS
EFIAPI
ArmCallRing3 (
IN RING3_CALL_DATA *Data,
IN VOID *StackPointer,
IN VOID *EntryPoint
);
VOID
EFIAPI
InitializeMsr (
@ -59,3 +67,12 @@ EnableSMAP (
{
ArmSetPan ();
}
EFI_STATUS
EFIAPI
CallRing3 (
IN RING3_CALL_DATA *Data
)
{
return ArmCallRing3 (Data, gRing3CallStackTop, gRing3EntryPoint);
}