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Ring3: Added NumberOfArguments to SysCall() and CallBootService().

This commit is contained in:
Mikhail Krichanov 2025-01-21 19:37:32 +03:00
parent 82c76dee94
commit dce1dbefaf
16 changed files with 147 additions and 128 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
MdeModulePkg/Core/Dxe/DxeMain.h
View File

@ -2737,6 +2737,7 @@ EFI_STATUS
EFIAPI
CallBootService (
IN UINT8 Type,
IN UINT8 NumberOfArguments,
IN UINTN *UserArguments,
IN UINTN ReturnSP
);

3
MdeModulePkg/Core/Dxe/DxeRing3/AARCH64/SysCall.S
View File

@ -11,7 +11,8 @@
// EFI_STATUS
// EFIAPI
// SysCall (
// IN UINT8 Type,
// IN UINT8 Type,
// IN UINT8 NumberOfArguments,
// ...
// );
//------------------------------------------------------------------------------

3
MdeModulePkg/Core/Dxe/DxeRing3/ARM/SysCall.S
View File

@ -11,7 +11,8 @@
// EFI_STATUS
// EFIAPI
// SysCall (
// IN UINT8 Type,
// IN UINT8 Type,
// IN UINT8 NumberOfArguments,
// ...
// );
//------------------------------------------------------------------------------

2
MdeModulePkg/Core/Dxe/DxeRing3/DxeRing3.c
View File

@ -238,7 +238,7 @@ Ring3Call (
break;
}
SysCall (SysCallReturnToCore, Status);
SysCall (SysCallReturnToCore, 1, Status);
}
EFI_STATUS

26
MdeModulePkg/Core/Dxe/DxeRing3/IA32/SysCall.nasm
View File

@ -3,6 +3,8 @@
; SPDX-License-Identifier: BSD-3-Clause
;------------------------------------------------------------------------------
#include <Uefi/UefiSpec.h>
extern ASM_PFX(Ring3Call)
DEFAULT REL
@ -12,18 +14,36 @@ SECTION .text
; EFI_STATUS
; EFIAPI
; SysCall (
; IN UINT8 Type,
; IN UINT8 Type,
; IN UINT8 NumberOfArguments,
; ...
; );
;------------------------------------------------------------------------------
global ASM_PFX(SysCall)
ASM_PFX(SysCall):
push ebx
mov edx, esp
mov ecx, [esp + 4] ; Type
mov ecx, [esp + 4*2] ; Type
mov ebx, [esp + 4*3] ; NumberOfArguments
lea eax, [userReturnAddress]
; Fixup NumberOfArguments.
cmp ecx, SC_FREE_PAGES
je fixup
cmp ecx, SC_BLOCK_IO_READ
je fixup
cmp ecx, SC_BLOCK_IO_WRITE
je fixup
cmp ecx, SC_DISK_IO_READ
je fixup
cmp ecx, SC_DISK_IO_WRITE
je fixup
jmp makecall
fixup:
add ebx, 1
makecall:
sysenter
userReturnAddress:
pop ebx
ret
;------------------------------------------------------------------------------

3
MdeModulePkg/Core/Dxe/DxeRing3/Ring3.h
View File

@ -14,7 +14,8 @@
EFI_STATUS
EFIAPI
SysCall (
IN UINT8 Type,
IN UINT8 Type,
IN UINT8 NumberOfArguments,
...
);

12
MdeModulePkg/Core/Dxe/DxeRing3/Ring3Protocols.c
View File

@ -16,6 +16,7 @@ Ring3BlockIoReset (
{
return SysCall (
SysCallBlockIoReset,
2,
This,
ExtendedVerification
);
@ -33,6 +34,7 @@ Ring3BlockIoRead (
{
return SysCall (
SysCallBlockIoRead,
5,
This,
MediaId,
BufferSize,
@ -53,6 +55,7 @@ Ring3BlockIoWrite (
{
return SysCall (
SysCallBlockIoWrite,
5,
This,
MediaId,
BufferSize,
@ -69,6 +72,7 @@ Ring3BlockIoFlush (
{
return SysCall (
SysCallBlockIoFlush,
1,
This
);
}
@ -85,6 +89,7 @@ Ring3DiskIoRead (
{
return SysCall (
SysCallDiskIoRead,
5,
This,
MediaId,
BufferSize,
@ -105,6 +110,7 @@ Ring3DiskIoWrite (
{
return SysCall (
SysCallDiskIoWrite,
5,
This,
MediaId,
BufferSize,
@ -123,6 +129,7 @@ Ring3UnicodeStriColl (
{
return (INTN)SysCall (
SysCallUnicodeStriColl,
3,
This,
Str1,
Str2
@ -139,6 +146,7 @@ Ring3UnicodeMetaiMatch (
{
return (BOOLEAN)SysCall (
SysCallUnicodeMetaiMatch,
3,
This,
String,
Pattern
@ -154,6 +162,7 @@ Ring3UnicodeStrLwr (
{
SysCall (
SysCallUnicodeStrLwr,
2,
This,
Str
);
@ -168,6 +177,7 @@ Ring3UnicodeStrUpr (
{
SysCall (
SysCallUnicodeStrUpr,
2,
This,
Str
);
@ -184,6 +194,7 @@ Ring3UnicodeFatToStr (
{
SysCall (
SysCallUnicodeFatToStr,
4,
This,
FatSize,
Fat,
@ -202,6 +213,7 @@ Ring3UnicodeStrToFat (
{
return (BOOLEAN)SysCall (
SysCallUnicodeStrToFat,
4,
This,
String,
FatSize,

11
MdeModulePkg/Core/Dxe/DxeRing3/Ring3UefiBootServices.c
View File

@ -98,6 +98,7 @@ Ring3RaiseTpl (
{
return (EFI_TPL)SysCall (
SysCallRaiseTpl,
1,
NewTpl
);
}
@ -110,6 +111,7 @@ Ring3RestoreTpl (
{
SysCall (
SysCallRestoreTpl,
1,
NewTpl
);
}
@ -127,6 +129,7 @@ Ring3AllocatePages (
Status = SysCall (
SysCallAllocatePages,
4,
Type,
EfiRing3MemoryType,
NumberOfPages,
@ -150,6 +153,7 @@ Ring3FreePages (
Status = SysCall (
SysCallFreePages,
2,
NumberOfPages,
Memory
);
@ -302,6 +306,7 @@ Ring3HandleProtocol (
Status = SysCall (
SysCallHandleProtocol,
3,
CoreUserHandle,
Protocol,
Interface
@ -511,6 +516,7 @@ Ring3OpenProtocol (
Status = SysCall (
SysCallOpenProtocol,
6,
CoreUserHandle,
Protocol,
Interface,
@ -536,6 +542,7 @@ Ring3CloseProtocol (
{
return SysCall (
SysCallCloseProtocol,
4,
UserHandle,
Protocol,
AgentHandle,
@ -587,6 +594,7 @@ Ring3LocateHandleBuffer (
StatusBS = SysCall (
SysCallLocateHandleBuffer,
5,
SearchType,
Protocol,
SearchKey,
@ -631,6 +639,7 @@ Ring3LocateProtocol (
Status = SysCall (
SysCallLocateProtocol,
3,
Protocol,
CoreRegistration,
Interface
@ -673,6 +682,7 @@ Ring3InstallMultipleProtocolInterfaces (
return SysCall (
SysCallInstallMultipleProtocolInterfaces,
2,
Handle,
ArgList
);
@ -700,6 +710,7 @@ Ring3CalculateCrc32 (
{
return SysCall (
SysCallCalculateCrc32,
3,
Data,
DataSize,
Crc32

1
MdeModulePkg/Core/Dxe/DxeRing3/Ring3UefiRuntimeServices.c
View File

@ -91,6 +91,7 @@ Ring3GetVariable (
{
return SysCall (
SysCallGetVariable,
5,
VariableName,
VendorGuid,
Attributes,

19
MdeModulePkg/Core/Dxe/DxeRing3/X64/SysCall.nasm
View File

@ -12,7 +12,8 @@ SECTION .text
; EFI_STATUS
; EFIAPI
; SysCall (
; IN UINT8 Type,
; IN UINT8 Type,
; IN UINT8 NumberOfArguments,
; ...
; );
;------------------------------------------------------------------------------
@ -20,7 +21,21 @@ global ASM_PFX(SysCall)
ASM_PFX(SysCall):
; Save Type for CoreBootServices().
mov r10, rcx
; Construct User Arguments[].
cmp rdx, 2
jg continue
push r9
push r8
mov r8, rsp
sub r8, 8
add rsp, 8*2
jmp makecall
continue:
mov [rsp + 8*4], r9
mov [rsp + 8*3], r8
mov r8, rsp
add r8, 8*2
makecall:
; SYSCALL saves RFLAGS into R11 and the RIP of the next instruction into RCX.
syscall
; SYSRET copies the value in RCX into RIP and loads RFLAGS from R11.

7
MdeModulePkg/Core/Dxe/SysCall/AARCH64/InitializeAARCH64.c
View File

@ -39,7 +39,7 @@ SysCallBootService (
Status = CoreAllocatePages (
AllocateAnyPages,
EfiRing3MemoryType,
EFI_SIZE_TO_PAGES (8 * sizeof (UINTN)),
EFI_SIZE_TO_PAGES (7 * sizeof (UINTN)),
&Physical
);
if (EFI_ERROR (Status)) {
@ -47,16 +47,17 @@ SysCallBootService (
}
AllowSupervisorAccessToUserMemory ();
CopyMem ((VOID *)Physical, (VOID *)&(Context.SystemContextAArch64->X0), 8 * sizeof (UINTN));
CopyMem ((VOID *)Physical, (VOID *)&(Context.SystemContextAArch64->X1), 7 * sizeof (UINTN));
ForbidSupervisorAccessToUserMemory ();
Status = CallBootService (
Context.SystemContextAArch64->X0,
Context.SystemContextAArch64->X1,
(UINTN *)Physical,
*(UINTN *)Context.SystemContextAArch64->SP
);
CoreFreePages (Physical, EFI_SIZE_TO_PAGES (9 * sizeof (UINTN)));
CoreFreePages (Physical, EFI_SIZE_TO_PAGES (7 * sizeof (UINTN)));
ArmDisableInterrupts ();

57
MdeModulePkg/Core/Dxe/SysCall/ARM/InitializeARM.c
View File

@ -32,13 +32,26 @@ SysCallBootService (
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS Physical;
UINT8 Type;
UINT8 NumberOfArguments;
ArmEnableInterrupts ();
Type = Context.SystemContextArm->R0;
NumberOfArguments = Context.SystemContextArm->R1;
if ((Type == SysCallFreePages)
|| (Type == SysCallBlockIoRead)
|| (Type == SysCallBlockIoWrite)
|| (Type == SysCallDiskIoRead)
|| (Type == SysCallDiskIoWrite)) {
++NumberOfArguments;
}
Status = CoreAllocatePages (
AllocateAnyPages,
EfiRing3MemoryType,
EFI_SIZE_TO_PAGES (8 * sizeof (UINTN)),
EFI_SIZE_TO_PAGES ((NumberOfArguments + 1) * sizeof (UINTN)),
&Physical
);
if (EFI_ERROR (Status)) {
@ -46,25 +59,47 @@ SysCallBootService (
}
AllowSupervisorAccessToUserMemory ();
//
// First 3 arguments are passed through R1-R3 and copied to SysCall Stack.
//
CopyMem ((VOID *)(UINTN)Physical, (VOID *)&(Context.SystemContextArm->R0), 4 * sizeof (UINTN));
//
// All remaining arguments are on User Stack.
//
CopyMem ((VOID *)((UINTN)Physical + 4 * sizeof (UINTN)), (VOID *)Context.SystemContextArm->SP, 4 * sizeof (UINTN));
if (Type == SysCallFreePages) {
//
// R0 == Type, R1 == NumberOfArguments, R2 == NumberOfPages, R3 == NULL
// [SP] == Memory
// Memory is passed as 2 words on stack and aligned on 8 bytes.
//
CopyMem ((VOID *)(UINTN)Physical, (VOID *)&(Context.SystemContextArm->R1), 2 * sizeof (UINTN));
CopyMem (
(VOID *)((UINTN)Physical + 2 * sizeof (UINTN)),
(VOID *)Context.SystemContextArm->SP,
2 * sizeof (UINTN)
);
} else {
//
// First 2 arguments are passed through R2-R3 and copied to SysCall Stack.
//
CopyMem ((VOID *)(UINTN)Physical, (VOID *)&(Context.SystemContextArm->R1), 3 * sizeof (UINTN));
if (NumberOfArguments > 2) {
//
// All remaining arguments are on User Stack.
//
CopyMem (
(VOID *)((UINTN)Physical + 3 * sizeof (UINTN)),
(VOID *)Context.SystemContextArm->SP,
(NumberOfArguments - 2) * sizeof (UINTN)
);
}
}
ForbidSupervisorAccessToUserMemory ();
Status = CallBootService (
Context.SystemContextArm->R0,
Type,
NumberOfArguments,
(UINTN *)(UINTN)Physical,
*(UINTN *)Context.SystemContextArm->SP_EL1
);
//
// TODO: Fix memory leak for ReturnToCore().
//
CoreFreePages (Physical, EFI_SIZE_TO_PAGES (9 * sizeof (UINTN)));
CoreFreePages (Physical, EFI_SIZE_TO_PAGES ((NumberOfArguments + 1) * sizeof (UINTN)));
ArmDisableInterrupts ();

91
MdeModulePkg/Core/Dxe/SysCall/BootServices.c
View File

@ -279,7 +279,7 @@ STATIC
UINTN *
EFIAPI
CopyUserArguments (
IN UINTN NumberOfArguments,
IN UINT8 NumberOfArguments,
IN UINTN *UserArguments
)
{
@ -330,6 +330,7 @@ EFI_STATUS
EFIAPI
CallBootService (
IN UINT8 Type,
IN UINT8 NumberOfArguments,
IN UINTN *UserArguments,
IN UINTN ReturnSP
)
@ -367,13 +368,12 @@ CallBootService (
Argument5 = 0;
Argument6 = 0;
Interface = NULL;
Arguments = CopyUserArguments (NumberOfArguments, UserArguments);
DEBUG ((DEBUG_VERBOSE, "Type: %a\n", SysCallNames[Type]));
switch (Type) {
case SysCallReturnToCore:
Arguments = CopyUserArguments (1, UserArguments);
ReturnToCore (Arguments[1], ReturnSP);
break;
case SysCallLocateProtocol:
@ -382,8 +382,6 @@ CallBootService (
// Argument 2: VOID *CoreRegistration
// Argument 3: VOID **Interface
//
Arguments = CopyUserArguments (3, UserArguments);
gCpu->GetMemoryAttributes (gCpu, (EFI_PHYSICAL_ADDRESS)Arguments[1], &Attributes);
ASSERT ((Attributes & EFI_MEMORY_USER) != 0);
gCpu->GetMemoryAttributes (gCpu, (EFI_PHYSICAL_ADDRESS)(Arguments[1] + sizeof (EFI_GUID) - 1), &Attributes);
@ -428,8 +426,6 @@ CallBootService (
// Argument 5: EFI_HANDLE CoreControllerHandle
// Argument 6: UINT32 Attributes
//
Arguments = CopyUserArguments (6, UserArguments);
gCpu->GetMemoryAttributes (gCpu, (EFI_PHYSICAL_ADDRESS)Arguments[2], &Attributes);
ASSERT ((Attributes & EFI_MEMORY_USER) != 0);
gCpu->GetMemoryAttributes (gCpu, (EFI_PHYSICAL_ADDRESS)(Arguments[2] + sizeof (EFI_GUID) - 1), &Attributes);
@ -476,8 +472,6 @@ CallBootService (
// Argument 1: EFI_HANDLE *Handle
// ...
//
Arguments = CopyUserArguments (2, UserArguments);
gCpu->GetMemoryAttributes (gCpu, (EFI_PHYSICAL_ADDRESS)Arguments[1], &Attributes);
ASSERT ((Attributes & EFI_MEMORY_USER) != 0);
gCpu->GetMemoryAttributes (gCpu, (EFI_PHYSICAL_ADDRESS)(Arguments[1] + sizeof (EFI_HANDLE *) - 1), &Attributes);
@ -588,8 +582,6 @@ CallBootService (
// Argument 3: EFI_HANDLE CoreAgentHandle
// Argument 4: EFI_HANDLE CoreControllerHandle
//
Arguments = CopyUserArguments (4, UserArguments);
gCpu->GetMemoryAttributes (gCpu, (EFI_PHYSICAL_ADDRESS)Arguments[2], &Attributes);
ASSERT ((Attributes & EFI_MEMORY_USER) != 0);
gCpu->GetMemoryAttributes (gCpu, (EFI_PHYSICAL_ADDRESS)(Arguments[2] + sizeof (EFI_GUID) - 1), &Attributes);
@ -619,8 +611,6 @@ CallBootService (
// Argument 2: EFI_GUID *Protocol
// Argument 3: VOID **Interface
//
Arguments = CopyUserArguments (3, UserArguments);
gCpu->GetMemoryAttributes (gCpu, (EFI_PHYSICAL_ADDRESS)Arguments[2], &Attributes);
ASSERT ((Attributes & EFI_MEMORY_USER) != 0);
gCpu->GetMemoryAttributes (gCpu, (EFI_PHYSICAL_ADDRESS)(Arguments[2] + sizeof (EFI_GUID) - 1), &Attributes);
@ -663,8 +653,6 @@ CallBootService (
// Argument 3: UINTN NumberOfPages
// Argument 4: EFI_PHYSICAL_ADDRESS *Memory
//
Arguments = CopyUserArguments (4, UserArguments);
Status = gBS->AllocatePages (
(EFI_ALLOCATE_TYPE)Arguments[1],
(EFI_MEMORY_TYPE)Arguments[2],
@ -689,8 +677,7 @@ CallBootService (
// Argument 1: UINTN NumberOfPages
// Argument 2: EFI_PHYSICAL_ADDRESS Memory
//
Arguments = CopyUserArguments (3, UserArguments);
PhysAddr = *(EFI_PHYSICAL_ADDRESS *)&Arguments[2];
PhysAddr = *(EFI_PHYSICAL_ADDRESS *)&Arguments[2];
gCpu->GetMemoryAttributes (gCpu, PhysAddr, &Attributes);
ASSERT ((Attributes & EFI_MEMORY_USER) != 0);
@ -706,8 +693,6 @@ CallBootService (
//
// Argument 1: EFI_TPL NewTpl
//
Arguments = CopyUserArguments (1, UserArguments);
Status = (EFI_STATUS)gBS->RaiseTPL ((EFI_TPL)Arguments[1]);
FreePool (Arguments);
@ -717,8 +702,6 @@ CallBootService (
//
// Argument 1: EFI_TPL NewTpl
//
Arguments = CopyUserArguments (1, UserArguments);
gBS->RestoreTPL ((EFI_TPL)Arguments[1]);
FreePool (Arguments);
@ -732,8 +715,6 @@ CallBootService (
// Argument 4: UINTN *NumberHandles
// Argument 5: EFI_HANDLE **Buffer
//
Arguments = CopyUserArguments (5, UserArguments);
if ((EFI_GUID *)Arguments[2] != NULL) {
gCpu->GetMemoryAttributes (gCpu, (EFI_PHYSICAL_ADDRESS)Arguments[2], &Attributes);
ASSERT ((Attributes & EFI_MEMORY_USER) != 0);
@ -805,8 +786,6 @@ CallBootService (
// Argument 2: UINTN DataSize
// Argument 3: UINT32 *Crc32
//
Arguments = CopyUserArguments (3, UserArguments);
gCpu->GetMemoryAttributes (gCpu, (EFI_PHYSICAL_ADDRESS)Arguments[1], &Attributes);
ASSERT ((Attributes & EFI_MEMORY_USER) != 0);
gCpu->GetMemoryAttributes (gCpu, (EFI_PHYSICAL_ADDRESS)(Arguments[1] + Arguments[2] - 1), &Attributes);
@ -847,8 +826,6 @@ CallBootService (
// Argument 4: UINTN *DataSize
// Argument 5: VOID *Data OPTIONAL
//
Arguments = CopyUserArguments (5, UserArguments);
gCpu->GetMemoryAttributes (gCpu, (EFI_PHYSICAL_ADDRESS)Arguments[1], &Attributes);
ASSERT ((Attributes & EFI_MEMORY_USER) != 0);
gCpu->GetMemoryAttributes (gCpu, (EFI_PHYSICAL_ADDRESS)Arguments[2], &Attributes);
@ -938,8 +915,6 @@ CallBootService (
// Argument 1: EFI_BLOCK_IO_PROTOCOL *This
// Argument 2: BOOLEAN ExtendedVerification
//
Arguments = CopyUserArguments (2, UserArguments);
BlockIo = FindInterface (FALSE, (VOID *)Arguments[1]);
if (BlockIo == NULL) {
@ -963,16 +938,7 @@ CallBootService (
// Argument 4: VOID *Buffer
// Argument 5: EFI_LBA Lba
//
#if defined (MDE_CPU_ARM)
//
// EFI_LBA Lba is aligned on 8 bytes.
//
Arguments = CopyUserArguments (7, UserArguments);
PhysAddr = *(EFI_PHYSICAL_ADDRESS *)&Arguments[6];
#else
Arguments = CopyUserArguments (6, UserArguments);
PhysAddr = *(EFI_PHYSICAL_ADDRESS *)&Arguments[5];
#endif
PhysAddr = *(EFI_PHYSICAL_ADDRESS *)&Arguments[5];
BlockIo = FindInterface (FALSE, (VOID *)Arguments[1]);
@ -1017,16 +983,7 @@ CallBootService (
// Argument 4: VOID *Buffer
// Argument 5: EFI_LBA Lba
//
#if defined (MDE_CPU_ARM)
//
// EFI_LBA Lba is aligned on 8 bytes.
//
Arguments = CopyUserArguments (7, UserArguments);
PhysAddr = *(EFI_PHYSICAL_ADDRESS *)&Arguments[6];
#else
Arguments = CopyUserArguments (6, UserArguments);
PhysAddr = *(EFI_PHYSICAL_ADDRESS *)&Arguments[5];
#endif
PhysAddr = *(EFI_PHYSICAL_ADDRESS *)&Arguments[5];
BlockIo = FindInterface (FALSE, (VOID *)Arguments[1]);
@ -1067,8 +1024,6 @@ CallBootService (
//
// Argument 1: EFI_BLOCK_IO_PROTOCOL *This
//
Arguments = CopyUserArguments (1, UserArguments);
BlockIo = FindInterface (FALSE, (VOID *)Arguments[1]);
if (BlockIo == NULL) {
@ -1089,16 +1044,7 @@ CallBootService (
// Argument 4: VOID *Buffer
// Argument 5: UINT64 Offset
//
#if defined (MDE_CPU_ARM)
//
// UINT64 Offset is aligned on 8 bytes.
//
Arguments = CopyUserArguments (7, UserArguments);
PhysAddr = *(EFI_PHYSICAL_ADDRESS *)&Arguments[6];
#else
Arguments = CopyUserArguments (6, UserArguments);
PhysAddr = *(EFI_PHYSICAL_ADDRESS *)&Arguments[5];
#endif
PhysAddr = *(EFI_PHYSICAL_ADDRESS *)&Arguments[5];
DiskIo = FindInterface (FALSE, (VOID *)Arguments[1]);
@ -1143,16 +1089,7 @@ CallBootService (
// Argument 4: VOID *Buffer
// Argument 5: UINT64 Offset
//
#if defined (MDE_CPU_ARM)
//
// UINT64 Offset is aligned on 8 bytes.
//
Arguments = CopyUserArguments (7, UserArguments);
PhysAddr = *(EFI_PHYSICAL_ADDRESS *)&Arguments[6];
#else
Arguments = CopyUserArguments (6, UserArguments);
PhysAddr = *(EFI_PHYSICAL_ADDRESS *)&Arguments[5];
#endif
PhysAddr = *(EFI_PHYSICAL_ADDRESS *)&Arguments[5];
DiskIo = FindInterface (FALSE, (VOID *)Arguments[1]);
@ -1195,8 +1132,6 @@ CallBootService (
// Argument 2: CHAR16 *Str1
// Argument 3: CHAR16 *Str2
//
Arguments = CopyUserArguments (3, UserArguments);
Unicode = FindInterface (FALSE, (VOID *)Arguments[1]);
if (Unicode == NULL) {
@ -1263,8 +1198,6 @@ CallBootService (
// Argument 2: CHAR16 *String
// Argument 3: CHAR16 *Pattern
//
Arguments = CopyUserArguments (3, UserArguments);
Unicode = FindInterface (FALSE, (VOID *)Arguments[1]);
if (Unicode == NULL) {
@ -1330,8 +1263,6 @@ CallBootService (
// Argument 1: EFI_UNICODE_COLLATION_PROTOCOL *This
// Argument 2: CHAR16 *Str
//
Arguments = CopyUserArguments (2, UserArguments);
Unicode = FindInterface (FALSE, (VOID *)Arguments[1]);
if (Unicode == NULL) {
@ -1376,8 +1307,6 @@ CallBootService (
// Argument 1: EFI_UNICODE_COLLATION_PROTOCOL *This
// Argument 2: CHAR16 *Str
//
Arguments = CopyUserArguments (2, UserArguments);
Unicode = FindInterface (FALSE, (VOID *)Arguments[1]);
if (Unicode == NULL) {
@ -1424,8 +1353,6 @@ CallBootService (
// Argument 3: CHAR8 *Fat
// Argument 4: CHAR16 *String
//
Arguments = CopyUserArguments (4, UserArguments);
Unicode = FindInterface (FALSE, (VOID *)Arguments[1]);
if (Unicode == NULL) {
@ -1494,8 +1421,6 @@ CallBootService (
// Argument 3: UINTN FatSize
// Argument 4: CHAR8 *Fat
//
Arguments = CopyUserArguments (4, UserArguments);
Unicode = FindInterface (FALSE, (VOID *)Arguments[1]);
if (Unicode == NULL) {

6
MdeModulePkg/Core/Dxe/SysCall/IA32/CoreBootServices.nasm
View File

@ -109,6 +109,7 @@ ASM_PFX(SysCallBase):
; );
;
; (eax) User return address.
; (ebx) Number of User Arguments.
; (ecx) Type.
; (edx) User Stack Pointer.
;
@ -135,8 +136,9 @@ ASM_PFX(CoreBootServices):
mov ebp, esp
mov eax, [esp + 4*3]
push eax ; ReturnSP
add edx, 4 ; User Arguments[]
push edx
add edx, 4*3
push edx ; User Arguments[]
push ebx ; NumberOfArguments
push ecx ; Type
sti

18
MdeModulePkg/Core/Dxe/SysCall/X64/CoreBootServices.nasm
View File

@ -117,13 +117,10 @@ ASM_PFX(SysCallBase):
; );
;
; (rcx) RIP of the next instruction saved by SYSCALL in SysCall().
; (rdx) Argument 1 of the called function.
; (r8) Argument 2 of the called function.
; (r9) Argument 3 of the called function.
; (rdx) Number of User Arguments.
; (r8) User Arguments[].
; (r10) Type.
; (r11) RFLAGS saved by SYSCALL in SysCall().
;
; (On User Stack) Argument 4, 5, ...
;------------------------------------------------------------------------------
global ASM_PFX(CoreBootServices)
ASM_PFX(CoreBootServices):
@ -147,23 +144,14 @@ ASM_PFX(CoreBootServices):
push rcx
; Save User RFLAGS for SYSRET.
push r11
; Save User Arguments [1..3] on User stack.
call ASM_PFX(AllowSupervisorAccessToUserMemory)
mov rax, [rsp + 8*3]
mov [rax + 8*2], rdx
mov [rax + 8*3], r8
mov [rax + 8*4], r9
call ASM_PFX(ForbidSupervisorAccessToUserMemory)
mov rbp, rsp
; Reserve space on stack for 4 CallBootService arguments (NOOPT prerequisite).
sub rsp, 8*4
; Prepare CallBootService arguments.
mov rcx, r10 ; Type
mov rdx, [rbp + 8*3]
add rdx, 8 ; User Arguments[]
mov rax, [ASM_PFX(SysCallStackTop)]
mov r8, [rax] ; ReturnSP
mov r9, [rax] ; ReturnSP
sti
call ASM_PFX(CallBootService)

15
MdePkg/Include/Uefi/UefiSpec.h
View File

@ -2024,7 +2024,7 @@ typedef enum {
SysCallCloseProtocol,
SysCallHandleProtocol,
SysCallAllocatePages,
SysCallFreePages,
SysCallFreePages = 7,
SysCallRaiseTpl,
SysCallRestoreTpl,
SysCallLocateHandleBuffer,
@ -2037,11 +2037,11 @@ typedef enum {
// Protocols
//
SysCallBlockIoReset,
SysCallBlockIoRead,
SysCallBlockIoWrite,
SysCallBlockIoRead = 14,
SysCallBlockIoWrite = 15,
SysCallBlockIoFlush,
SysCallDiskIoRead,
SysCallDiskIoWrite,
SysCallDiskIoRead = 17,
SysCallDiskIoWrite = 18,
SysCallUnicodeStriColl,
SysCallUnicodeMetaiMatch,
SysCallUnicodeStrLwr,
@ -2052,6 +2052,11 @@ typedef enum {
} SYS_CALL_TYPE;
#define MAX_LIST 32
#define SC_FREE_PAGES 7
#define SC_BLOCK_IO_READ 14
#define SC_BLOCK_IO_WRITE 15
#define SC_DISK_IO_READ 17
#define SC_DISK_IO_WRITE 18
///
/// Contains a set of GUID/pointer pairs comprised of the ConfigurationTable field in the