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Ring3: Placed UnicodeCollation driver into User space.

This commit is contained in:
Mikhail Krichanov 2025-01-20 12:57:14 +03:00
parent cd65706178
commit 93625d5489
13 changed files with 190 additions and 104 deletions
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31
ArmPkg/Library/ArmExceptionLib/AArch64/ExceptionSupport.S
View File

@ -90,6 +90,8 @@
UINT64 ESR; 0x318 // Exception syndrome register
UINT64 FAR; 0x320 // Fault Address Register
UINT64 Type; 0x328 // Exception Type
UINT64 TTBR0; 0x330 // User Page Table
UINT64 Padding;0x338 // Alignment requirement
*/
GCC_ASM_EXPORT(ExceptionHandlersEnd)
@ -99,7 +101,7 @@ GCC_ASM_EXPORT(CommonCExceptionHandler)
#define GP_CONTEXT_SIZE (32 * 8)
#define FP_CONTEXT_SIZE (32 * 16)
#define SYS_CONTEXT_SIZE ( 6 * 8) // 5 SYS regs + Alignment requirement (ie: the stack must be aligned on 0x10)
#define SYS_CONTEXT_SIZE ( 8 * 8) // 7 SYS regs + Alignment requirement (ie: the stack must be aligned on 0x10)
ASM_FUNC_ALIGN(ExceptionHandlerBase, 4096)
@ -264,6 +266,11 @@ ASM_PFX(CommonExceptionEntry):
stp x2, x3, [x28, #-SYS_CONTEXT_SIZE]!
stp x4, x5, [x28, #0x10]
stp x6, x0, [x28, #0x20]
EL1_OR_EL2(x1)
1:mrs x2, ttbr0_el1
b 3f
2:mrs x2, ttbr0_el2
3:stp x2, xzr, [x28, #0x30]
// Push FP regs to Stack.
stp q0, q1, [x28, #-FP_CONTEXT_SIZE]!
@ -288,17 +295,12 @@ ASM_PFX(CommonExceptionEntry):
cmp x2, 0 // Check whether EL0 process was interrupted
b.ne NoTTBR0Switch
adrp x1, ASM_PFX(CorePageTable)
ldr x4, [x1]
EL1_OR_EL2(x3)
1:mrs x4, ttbr0_el1
str x4, [x1, #0x8] // UserPageTable
ldr x4, [x1] // CorePageTable
msr ttbr0_el1, x4
1:msr ttbr0_el1, x4
tlbi vmalle1
b 3f
2:mrs x4, ttbr0_el2
str x4, [x1, #0x8] // UserPageTable
ldr x4, [x1] // CorePageTable
msr ttbr0_el2, x4
2:msr ttbr0_el2, x4
tlbi alle2
3:dsb sy
isb
@ -324,14 +326,12 @@ NoTTBR0Switch:
and x2, x2, #0xF
cmp x2, 0 // Check whether EL0 process was interrupted
b.ne NoTTBR0Switch2
adrp x1, ASM_PFX(CorePageTable)
ldr x4, [x28, #(FP_CONTEXT_SIZE + 0x30)] // UserPageTable
EL1_OR_EL2(x3)
1:ldr x4, [x1, #0x8] // UserPageTable
msr ttbr0_el1, x4
1:msr ttbr0_el1, x4
tlbi vmalle1
b 3f
2:ldr x4, [x1, #0x8] // UserPageTable
msr ttbr0_el2, x4
2:msr ttbr0_el2, x4
tlbi alle2
3:dsb sy
isb
@ -428,9 +428,6 @@ ASM_FUNC(RegisterEl0Stack)
ASM_PFX(CorePageTable):
.ds.d 1
UserPageTable:
.ds.d 1
.balign 4096
Padding:
.ds.b 1

51
ArmPkg/Library/ArmExceptionLib/Arm/ExceptionSupport.S
View File

@ -43,8 +43,11 @@ This is the stack constructed by the exception handler (low address to high addr
LR 0x54 # SVC Link register (we need to restore it)
LR 0x58 # pushed by srsfd
CPSR 0x5c
TTBR0 0x58
Padding 0x5c
LR 0x60 # pushed by srsfd
CPSR 0x64
*/
@ -98,7 +101,7 @@ ASM_PFX(Fiq):
ASM_PFX(ResetEntry):
srsdb #0x13! @ Store return state on SVC stack
@ We are already in SVC mode
sub SP, SP, #0x8 @ Save space for TTBR0
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
@ -111,6 +114,7 @@ ASM_PFX(UndefinedInstructionEntry):
sub LR, LR, #4 @ Only -2 for Thumb, adjust in CommonExceptionEntry
srsdb #0x13! @ Store return state on SVC stack
cps #0x13 @ Switch to SVC for common stack
sub SP, SP, #0x8 @ Save space for TTBR0
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
@ -124,6 +128,7 @@ ASM_PFX(SoftwareInterruptEntry):
isb
srsdb #0x13! @ Store return state on SVC stack
@ We are already in SVC mode
sub SP, SP, #0x8 @ Save space for TTBR0
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
@ -136,6 +141,7 @@ ASM_PFX(PrefetchAbortEntry):
sub LR,LR,#4
srsdb #0x13! @ Store return state on SVC stack
cps #0x13 @ Switch to SVC for common stack
sub SP, SP, #0x8 @ Save space for TTBR0
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
@ -148,6 +154,7 @@ ASM_PFX(DataAbortEntry):
sub LR,LR,#8
srsdb #0x13! @ Store return state on SVC stack
cps #0x13 @ Switch to SVC for common stack
sub SP, SP, #0x8 @ Save space for TTBR0
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
@ -159,6 +166,7 @@ ASM_PFX(DataAbortEntry):
ASM_PFX(ReservedExceptionEntry):
srsdb #0x13! @ Store return state on SVC stack
cps #0x13 @ Switch to SVC for common stack
sub SP, SP, #0x8 @ Save space for TTBR0
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
@ -171,6 +179,7 @@ ASM_PFX(IrqEntry):
sub LR,LR,#4
srsdb #0x13! @ Store return state on SVC stack
cps #0x13 @ Switch to SVC for common stack
sub SP, SP, #0x8 @ Save space for TTBR0
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
@ -183,6 +192,7 @@ ASM_PFX(FiqEntry):
sub LR,LR,#4
srsdb #0x13! @ Store return state on SVC stack
cps #0x13 @ Switch to SVC for common stack
sub SP, SP, #0x8 @ Save space for TTBR0
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
@ -217,7 +227,7 @@ ASM_PFX(AsmCommonExceptionEntry):
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] @ srsdb saved pre-exception CPSR on the stack
ldr R1, [SP, #0x64] @ srsdb 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
@ -229,20 +239,20 @@ ASM_PFX(AsmCommonExceptionEntry):
stmdaeq R2, {sp}^ @ save unbanked sp
@ else
stmdane R2, {lr} @ save SVC lr
addne R1, SP, #0x60 @ We pushed 0x60 bytes on the stack
addne R1, SP, #0x68 @ We pushed 0x68 bytes on the stack
strne R1, [SP, #0x34] @ Store it in EFI_SYSTEM_CONTEXT_ARM.SP
ldr R5, [SP, #0x58] @ PC is the LR pushed by srsfd
ldr R5, [SP, #0x60] @ 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 different LR adjust for Thumb
bhi NoAdjustNeeded
ldr R1, [SP, #0x5c] @ srsdb saved pre-exception CPSR on the stack
ldr R1, [SP, #0x64] @ srsdb saved pre-exception CPSR on the stack
tst r1, #0x20 @ if ((CPSR & T)) == T) { // Thumb Mode on entry
addne R5, R5, #2 @ PC += 2;
strne R5,[SP,#0x58] @ Update LR value pushed by srsfd
strne R5,[SP,#0x60] @ Update LR value pushed by srsfd
NoAdjustNeeded:
@ -251,17 +261,12 @@ NoAdjustNeeded:
@ R0 is ExceptionType
mov R1,SP @ R1 is SystemContext
#if (FixedPcdGet32(PcdVFPEnabled))
vpush {d0-d15} @ save vstm registers in case they are used in optimizations
#endif
ldr R5, [SP, #0x40] @ Saved Processor Status Register
and R5, R5, #0xF
cmp R5, 0 @ Check whether EL0 process was interrupted
bne NoTTBR0Switch
mrc p15,0,R5,c2,c0,0 @ R5 == TTBR0
ADRL (R6, UserPageTable)
str R5, [R6]
str R5, [SP, #0x58]
and R5, R5, #0x7F @ Preserve TTBR0 attributes
LDRL (R6, ASM_PFX(CorePageTable))
orr R6, R6, R5 @ Assign TTBR0 attributes
@ -273,6 +278,10 @@ NoAdjustNeeded:
NoTTBR0Switch:
#if (FixedPcdGet32(PcdVFPEnabled))
vpush {d0-d15} @ save vstm registers in case they are used in optimizations
#endif
mov R4, SP @ Save current SP
tst R4, #4
subne SP, SP, #4 @ Adjust SP if not 8-byte aligned
@ -292,11 +301,15 @@ CommonCExceptionHandler (
mov SP, R4 @ Restore SP
#if (FixedPcdGet32(PcdVFPEnabled))
vpop {d0-d15}
#endif
ldr R4, [SP, #0x40] @ Saved Processor Status Register
and R4, R4, #0xF
cmp R4, 0 @ Check whether EL0 process was interrupted
bne NoTTBR0Switch2
LDRL (R4, UserPageTable)
ldr R4, [SP, #0x58] @ User Page Table
mcr p15,0,R4,c2,c0,0 @ TTBR0 == R4
mcr p15,0,r0,c8,c7,0 @ TLBIALL, TLB Invalidate All.
mcr p15,0,r0,c7,c5,6 @ BPIALL, Branch Predictor Invalidate All.
@ -305,10 +318,6 @@ CommonCExceptionHandler (
NoTTBR0Switch2:
#if (FixedPcdGet32(PcdVFPEnabled))
vpop {d0-d15}
#endif
ldr R1, [SP, #0x4c] @ Restore EFI_SYSTEM_CONTEXT_ARM.IFSR
mcr p15, 0, R1, c5, c0, 1 @ Write IFSR
@ -325,6 +334,7 @@ NoTTBR0Switch2:
add SP,SP,#0x20 @ Clear out the remaining stack space
ldmfd SP!,{LR} @ restore the link register for this context
add SP, SP, #0x8 @ Clear out TTBR0 and Padding
rfefd SP! @ return from exception via srsfd stack slot
ASM_FUNC_ALIGN(ExceptionHandlerFinal, 4096)
@ -336,9 +346,6 @@ ASM_FUNC_ALIGN(ExceptionHandlerFinal, 4096)
ASM_PFX(CorePageTable):
.ds.l 1
UserPageTable:
.ds.l 1
.balign 4096
Padding:
.ds.b 1

2
ArmVirtPkg/ArmVirtQemuFvMain.fdf.inc
View File

@ -90,7 +90,7 @@ APRIORI DXE {
INF MdeModulePkg/Universal/Disk/PartitionDxe/PartitionDxe.inf
INF USER FatPkg/EnhancedFatDxe/Fat.inf
INF USER MdeModulePkg/Core/Dxe/DxeRing3/DxeRing3.inf
INF MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
INF USER MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
INF MdeModulePkg/Universal/Disk/UdfDxe/UdfDxe.inf
INF OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf

6
MdeModulePkg/Core/Dxe/SysCall/AARCH64/CoreBootServices.S
View File

@ -82,7 +82,8 @@ ASM_FUNC(ArmCallRing3)
stp q12, q13, [sp, #0xa0]
stp q14, q15, [sp, #0x80]
stp xzr, x16, [sp, #0x70]
mrs x6, sp_el0
stp x6, x16, [sp, #0x70]
stp x17, x18, [sp, #0x60]
stp x19, x20, [sp, #0x50]
stp x21, x22, [sp, #0x40]
@ -138,7 +139,7 @@ ASM_FUNC(ReturnToCore)
ldp q12, q13, [sp, #0xa0]
ldp q14, q15, [sp, #0x80]
ldr x16, [sp, #0x78]
ldp x6, x16, [sp, #0x70]
ldp x17, x18, [sp, #0x60]
ldp x19, x20, [sp, #0x50]
ldp x21, x22, [sp, #0x40]
@ -147,6 +148,7 @@ ASM_FUNC(ReturnToCore)
ldp x27, x28, [sp, #0x10]
ldp x29, x30, [sp]
add sp, sp, #0x100
msr sp_el0, x6
// Enable interrupts.
msr daifclr, #0xf
isb

5
MdeModulePkg/Core/Dxe/SysCall/AARCH64/InitializeAARCH64.c
View File

@ -12,8 +12,7 @@
#include "DxeMain.h"
STATIC UINTN mSysCallStackTop;
UINTN gUserPageTable;
UINTN gUserPageTable;
EFI_STATUS
EFIAPI
@ -156,8 +155,6 @@ CallRing3 (
IN UINTN *ReturnSP
)
{
mSysCallStackTop = SysCallStackTop;
return ArmCallRing3 (
Data,
UserStackTop,

7
MdeModulePkg/Core/Dxe/SysCall/ARM/CoreBootServices.S
View File

@ -76,6 +76,9 @@ ASM_FUNC(ArmCallRing3)
ldr R6, [SP, #0x28]
// R7 is gUserPageTable
ldr R7, [SP, #0x2C]
// Save old SP_usr and LR_usr on Core Stack.
sub SP, SP, #0x8
stmia SP, {SP, LR}^
#if (FixedPcdGet32(PcdVFPEnabled))
// Save vstm registers in case they are used in optimizations.
@ -135,6 +138,10 @@ ASM_FUNC(ReturnToCore)
vpop {d0-d15}
#endif
// Restore old SP_usr and LR_usr.
ldmia SP, {SP, LR}^
add SP, SP, #0x8
pop {R4-R12, LR}
// Enable interrupts.

5
MdeModulePkg/Core/Dxe/SysCall/ARM/InitializeARM.c
View File

@ -11,8 +11,7 @@
#include "DxeMain.h"
STATIC UINTN mSysCallStackTop;
UINTN gUserPageTable;
UINTN gUserPageTable;
EFI_STATUS
EFIAPI
@ -151,8 +150,6 @@ CallRing3 (
IN UINTN *ReturnSP
)
{
mSysCallStackTop = SysCallStackTop;
return ArmCallRing3 (
Data,
UserStackTop,

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

@ -180,24 +180,27 @@ ASM_PFX(CallRing3):
push ebp
push edi
push esi
; Save old SysCallStackTop.
push dword MSR_IA32_SYSENTER_ESP
call ASM_PFX(AsmReadMsr64)
pop ebx
push eax
; Save Core Stack pointer.
mov ebx, [esp + 4 * 8] ; ReturnSP
mov ebx, [esp + 4 * 9] ; ReturnSP
mov [ebx], esp
mov ebx, [esp + 4 * 7]
mov [ASM_PFX(SysCallStackTop)], ebx
mov edx, 0
mov eax, ebx
mov eax, [esp + 4 * 8] ; SysCallStackTop
mov ecx, MSR_IA32_SYSENTER_ESP
wrmsr
SetRing3DataSegmentSelectors
; Prepare SYSEXIT arguments.
mov ecx, [esp + 4 * 6] ; UserStackTop
mov ecx, [esp + 4 * 7] ; UserStackTop
mov edx, [ASM_PFX(gRing3EntryPoint)]
mov eax, [esp + 4 * 5] ; Data
mov eax, [esp + 4 * 6] ; Data
; Switch to User Stack.
mov ebp, ecx
@ -223,8 +226,15 @@ ASM_PFX(SysCallEnd):
;------------------------------------------------------------------------------
global ASM_PFX(ReturnToCore)
ASM_PFX(ReturnToCore):
mov eax, [esp + 4] ; Status
mov ebx, [esp + 4] ; Status
mov esp, [esp + 4*2] ; ReturnSP
; Restore old SysCallStackTop.
mov edx, 0
pop eax
mov ecx, MSR_IA32_SYSENTER_ESP
wrmsr
mov eax, ebx
pop esi
pop edi
pop ebp
@ -245,5 +255,5 @@ ASM_PFX(gUserPageTable):
resd 1
ALIGN 4096
ASM_PFX(SysCallStackTop):
Padding:
resd 1

153
MdeModulePkg/Core/Dxe/SysCall/SupportedProtocols.c
View File

@ -60,9 +60,6 @@ GoToRing3 (
VA_END (Marker);
ForbidSupervisorAccessToUserMemory ();
//
// TODO: Get(),Set() for old SysCallStackTop.
//
//
// TODO: Allocate new stacks (only for EFI_FILE_PROTOCOL instances?),
// because UserDriver can be interrupted and interrupt handler may call the same UserDriver again.
//
@ -83,16 +80,20 @@ STATIC
USER_SPACE_DRIVER *
EFIAPI
FindUserSpaceDriver (
IN VOID *CoreWrapper
IN VOID *CoreWrapper,
OUT UINTN *OldPageTable
)
{
LIST_ENTRY *Link;
USER_SPACE_DRIVER *UserDriver;
ASSERT (OldPageTable != NULL);
for (Link = gUserSpaceDriversHead.ForwardLink; Link != &gUserSpaceDriversHead; Link = Link->ForwardLink) {
UserDriver = BASE_CR (Link, USER_SPACE_DRIVER, Link);
if (UserDriver->CoreWrapper == CoreWrapper) {
*OldPageTable = gUserPageTable;
gUserPageTable = UserDriver->UserPageTable;
return UserDriver;
}
@ -112,8 +113,9 @@ CoreDriverBindingSupported (
EFI_STATUS Status;
USER_SPACE_DRIVER *UserDriver;
VOID *EntryPoint;
UINTN OldPageTable;
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -131,6 +133,8 @@ CoreDriverBindingSupported (
RemainingDevicePath
);
gUserPageTable = OldPageTable;
return Status;
}
@ -145,8 +149,9 @@ CoreDriverBindingStart (
EFI_STATUS Status;
USER_SPACE_DRIVER *UserDriver;
VOID *EntryPoint;
UINTN OldPageTable;
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -164,6 +169,8 @@ CoreDriverBindingStart (
RemainingDevicePath
);
gUserPageTable = OldPageTable;
return Status;
}
@ -179,8 +186,9 @@ CoreDriverBindingStop (
EFI_STATUS Status;
USER_SPACE_DRIVER *UserDriver;
VOID *EntryPoint;
UINTN OldPageTable;
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -199,6 +207,8 @@ CoreDriverBindingStop (
ChildHandleBuffer
);
gUserPageTable = OldPageTable;
return Status;
}
@ -212,8 +222,9 @@ CoreFileClose (
EFI_STATUS Status;
USER_SPACE_DRIVER *UserDriver;
VOID *EntryPoint;
UINTN OldPageTable;
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -232,6 +243,8 @@ CoreFileClose (
FreePool (UserDriver->CoreWrapper);
RemoveEntryList (&UserDriver->Link);
gUserPageTable = OldPageTable;
return Status;
}
@ -261,6 +274,7 @@ CoreFileRead (
UINT32 PagesNumber;
USER_SPACE_DRIVER *UserDriver;
VOID *EntryPoint;
UINTN OldPageTable;
if ((This == NULL) || (BufferSize == NULL)) {
return EFI_INVALID_PARAMETER;
@ -268,7 +282,7 @@ CoreFileRead (
//
// gUserPageTable must be set before alloctation of EfiRing3MemoryType pages.
//
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -284,6 +298,7 @@ CoreFileRead (
&Ring3Pages
);
if (EFI_ERROR (Status)) {
gUserPageTable = OldPageTable;
return Status;
}
@ -317,6 +332,8 @@ CoreFileRead (
CoreFreePages (Ring3Pages, PagesNumber);
gUserPageTable = OldPageTable;
return Status;
}
@ -340,10 +357,12 @@ CoreFileSetPosition (
IN UINT64 Position
)
{
EFI_STATUS Status;
USER_SPACE_DRIVER *UserDriver;
VOID *EntryPoint;
UINTN OldPageTable;
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -353,40 +372,43 @@ CoreFileSetPosition (
ForbidSupervisorAccessToUserMemory ();
#if defined (MDE_CPU_X64) || defined (MDE_CPU_AARCH64)
return GoToRing3 (
2,
EntryPoint,
UserDriver,
This,
Position
);
Status = GoToRing3 (
2,
EntryPoint,
UserDriver,
This,
Position
);
#elif defined (MDE_CPU_IA32)
//
// UINT64 Position is passed as 2 double words on stack.
//
return GoToRing3 (
3,
EntryPoint,
UserDriver,
This,
Position
);
Status = GoToRing3 (
3,
EntryPoint,
UserDriver,
This,
Position
);
#elif defined (MDE_CPU_ARM)
//
// UINT64 Position is passed as 2 words in 2 registers and is aligned on 8 bytes.
// R0 == This, R1 == NULL, R2 == Position_Low, R3 == Position_High.
//
return GoToRing3 (
4,
EntryPoint,
UserDriver,
This,
NULL,
(UINT32)Position,
(UINT32)(Position >> 32)
);
Status = GoToRing3 (
4,
EntryPoint,
UserDriver,
This,
NULL,
(UINT32)Position,
(UINT32)(Position >> 32)
);
#endif
gUserPageTable = OldPageTable;
return Status;
}
STATIC
@ -401,12 +423,13 @@ CoreFileGetPosition (
EFI_PHYSICAL_ADDRESS Ring3Position;
USER_SPACE_DRIVER *UserDriver;
VOID *EntryPoint;
UINTN OldPageTable;
if ((This == NULL) || (Position == NULL)) {
return EFI_INVALID_PARAMETER;
}
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -418,6 +441,7 @@ CoreFileGetPosition (
&Ring3Position
);
if (EFI_ERROR (Status)) {
gUserPageTable = OldPageTable;
return Status;
}
@ -440,6 +464,8 @@ CoreFileGetPosition (
CoreFreePages (Ring3Position, 1);
gUserPageTable = OldPageTable;
return Status;
}
@ -461,12 +487,13 @@ CoreFileGetInfo (
UINT32 PagesNumber;
USER_SPACE_DRIVER *UserDriver;
VOID *EntryPoint;
UINTN OldPageTable;
if ((This == NULL) || (BufferSize == NULL)) {
return EFI_INVALID_PARAMETER;
}
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -484,6 +511,7 @@ CoreFileGetInfo (
&Ring3Pages
);
if (EFI_ERROR (Status)) {
gUserPageTable = OldPageTable;
return Status;
}
@ -526,6 +554,8 @@ CoreFileGetInfo (
CoreFreePages (Ring3Pages, PagesNumber);
gUserPageTable = OldPageTable;
return Status;
}
@ -620,12 +650,13 @@ CoreFileOpen (
USER_SPACE_DRIVER *UserDriver;
USER_SPACE_DRIVER *NewDriver;
VOID *EntryPoint;
UINTN OldPageTable;
if ((This == NULL) || (NewHandle == NULL) || (FileName == NULL)) {
return EFI_INVALID_PARAMETER;
}
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -644,6 +675,7 @@ CoreFileOpen (
);
if (EFI_ERROR (Status)) {
*NewHandle = NULL;
gUserPageTable = OldPageTable;
return Status;
}
@ -657,6 +689,7 @@ CoreFileOpen (
if (EFI_ERROR (Status)) {
*NewHandle = NULL;
CoreFreePages (Ring3Pages, PagesNumber);
gUserPageTable = OldPageTable;
return Status;
}
@ -709,6 +742,7 @@ CoreFileOpen (
if (EFI_ERROR (Status)) {
*NewHandle = NULL;
CoreFreePages (Ring3Pages, PagesNumber);
gUserPageTable = OldPageTable;
return Status;
}
@ -716,6 +750,7 @@ CoreFileOpen (
if (NewFile == NULL) {
*NewHandle = NULL;
CoreFreePages (Ring3Pages, PagesNumber);
gUserPageTable = OldPageTable;
return EFI_OUT_OF_RESOURCES;
}
@ -751,6 +786,8 @@ CoreFileOpen (
CoreFreePages (Ring3Pages, PagesNumber);
gUserPageTable = OldPageTable;
return Status;
}
@ -768,12 +805,13 @@ CoreOpenVolume (
USER_SPACE_DRIVER *UserDriver;
USER_SPACE_DRIVER *NewDriver;
VOID *EntryPoint;
UINTN OldPageTable;
if (Root == NULL) {
return EFI_INVALID_PARAMETER;
}
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -790,6 +828,7 @@ CoreOpenVolume (
);
if (EFI_ERROR (Status)) {
*Root = NULL;
gUserPageTable = OldPageTable;
return Status;
}
@ -805,6 +844,7 @@ CoreOpenVolume (
if (EFI_ERROR (Status)) {
*Root = NULL;
CoreFreePages (Physical, 1);
gUserPageTable = OldPageTable;
return Status;
}
@ -812,6 +852,7 @@ CoreOpenVolume (
if (File == NULL) {
*Root = NULL;
CoreFreePages (Physical, 1);
gUserPageTable = OldPageTable;
return EFI_OUT_OF_RESOURCES;
}
@ -847,6 +888,8 @@ CoreOpenVolume (
CoreFreePages (Physical, 1);
gUserPageTable = OldPageTable;
return Status;
}
@ -864,8 +907,9 @@ CoreUnicodeCollationStriColl (
VOID *EntryPoint;
UINTN Size1;
UINTN Size2;
UINTN OldPageTable;
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -880,6 +924,7 @@ CoreUnicodeCollationStriColl (
&UserMem
);
if (EFI_ERROR (Status)) {
gUserPageTable = OldPageTable;
return 0;
}
@ -900,6 +945,8 @@ CoreUnicodeCollationStriColl (
CoreFreePages (UserMem, EFI_SIZE_TO_PAGES (Size1 + Size2));
gUserPageTable = OldPageTable;
return (INTN)Status;
}
@ -917,8 +964,9 @@ CoreUnicodeCollationMetaiMatch (
VOID *EntryPoint;
UINTN Size1;
UINTN Size2;
UINTN OldPageTable;
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -933,6 +981,7 @@ CoreUnicodeCollationMetaiMatch (
&UserMem
);
if (EFI_ERROR (Status)) {
gUserPageTable = OldPageTable;
return FALSE;
}
@ -953,6 +1002,8 @@ CoreUnicodeCollationMetaiMatch (
CoreFreePages (UserMem, EFI_SIZE_TO_PAGES (Size1 + Size2));
gUserPageTable = OldPageTable;
return (BOOLEAN)Status;
}
@ -968,8 +1019,9 @@ CoreUnicodeCollationStrLwr (
USER_SPACE_DRIVER *UserDriver;
VOID *EntryPoint;
UINTN Size1;
UINTN OldPageTable;
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -983,6 +1035,7 @@ CoreUnicodeCollationStrLwr (
&UserMem
);
if (EFI_ERROR (Status)) {
gUserPageTable = OldPageTable;
return;
}
@ -1004,6 +1057,8 @@ CoreUnicodeCollationStrLwr (
ForbidSupervisorAccessToUserMemory ();
CoreFreePages (UserMem, EFI_SIZE_TO_PAGES (Size1));
gUserPageTable = OldPageTable;
}
VOID
@ -1018,8 +1073,9 @@ CoreUnicodeCollationStrUpr (
USER_SPACE_DRIVER *UserDriver;
VOID *EntryPoint;
UINTN Size1;
UINTN OldPageTable;
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -1033,6 +1089,7 @@ CoreUnicodeCollationStrUpr (
&UserMem
);
if (EFI_ERROR (Status)) {
gUserPageTable = OldPageTable;
return;
}
@ -1054,6 +1111,8 @@ CoreUnicodeCollationStrUpr (
ForbidSupervisorAccessToUserMemory ();
CoreFreePages (UserMem, EFI_SIZE_TO_PAGES (Size1));
gUserPageTable = OldPageTable;
}
VOID
@ -1069,8 +1128,9 @@ CoreUnicodeCollationFatToStr (
EFI_PHYSICAL_ADDRESS UserMem;
USER_SPACE_DRIVER *UserDriver;
VOID *EntryPoint;
UINTN OldPageTable;
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -1082,6 +1142,7 @@ CoreUnicodeCollationFatToStr (
&UserMem
);
if (EFI_ERROR (Status)) {
gUserPageTable = OldPageTable;
return;
}
@ -1105,6 +1166,8 @@ CoreUnicodeCollationFatToStr (
ForbidSupervisorAccessToUserMemory ();
CoreFreePages (UserMem, EFI_SIZE_TO_PAGES (FatSize * 3));
gUserPageTable = OldPageTable;
}
BOOLEAN
@ -1121,8 +1184,9 @@ CoreUnicodeCollationStrToFat (
USER_SPACE_DRIVER *UserDriver;
VOID *EntryPoint;
UINTN Size1;
UINTN OldPageTable;
UserDriver = FindUserSpaceDriver (This);
UserDriver = FindUserSpaceDriver (This, &OldPageTable);
ASSERT (UserDriver != NULL);
This = UserDriver->UserSpaceDriver;
@ -1136,6 +1200,7 @@ CoreUnicodeCollationStrToFat (
&UserMem
);
if (EFI_ERROR (Status)) {
gUserPageTable = OldPageTable;
return FALSE;
}
@ -1160,5 +1225,7 @@ CoreUnicodeCollationStrToFat (
CoreFreePages (UserMem, EFI_SIZE_TO_PAGES (FatSize + Size1));
gUserPageTable = OldPageTable;
return (BOOLEAN)Status;
}

2
MdeModulePkg/Core/Dxe/SysCall/X64/CoreBootServices.nasm
View File

@ -218,6 +218,7 @@ ASM_PFX(CallRing3):
push r13
push r14
push r15
push qword [ASM_PFX(SysCallStackTop)]
; Save Core Stack pointer.
mov [r9], rsp
@ -260,6 +261,7 @@ ASM_PFX(SysCallEnd):
global ASM_PFX(ReturnToCore)
ASM_PFX(ReturnToCore):
mov rsp, rdx
pop qword [ASM_PFX(SysCallStackTop)]
pop r15
pop r14
pop r13

2
OvmfPkg/OvmfPkgIa32.fdf
View File

@ -265,7 +265,7 @@ INF MdeModulePkg/Universal/DevicePathDxe/DevicePathDxe.inf
INF MdeModulePkg/Universal/Disk/DiskIoDxe/DiskIoDxe.inf
INF MdeModulePkg/Universal/Disk/PartitionDxe/PartitionDxe.inf
INF MdeModulePkg/Universal/Disk/RamDiskDxe/RamDiskDxe.inf
INF MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
INF USER MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
INF MdeModulePkg/Bus/Scsi/ScsiBusDxe/ScsiBusDxe.inf
INF MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf
INF MdeModulePkg/Bus/Pci/SataControllerDxe/SataControllerDxe.inf

2
OvmfPkg/OvmfPkgIa32X64.fdf
View File

@ -266,7 +266,7 @@ INF MdeModulePkg/Universal/DevicePathDxe/DevicePathDxe.inf
INF MdeModulePkg/Universal/Disk/DiskIoDxe/DiskIoDxe.inf
INF MdeModulePkg/Universal/Disk/PartitionDxe/PartitionDxe.inf
INF MdeModulePkg/Universal/Disk/RamDiskDxe/RamDiskDxe.inf
INF MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
INF USER MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
INF MdeModulePkg/Bus/Scsi/ScsiBusDxe/ScsiBusDxe.inf
INF MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf
INF MdeModulePkg/Bus/Pci/SataControllerDxe/SataControllerDxe.inf

2
OvmfPkg/OvmfPkgX64.fdf
View File

@ -295,7 +295,7 @@ INF MdeModulePkg/Universal/DevicePathDxe/DevicePathDxe.inf
INF MdeModulePkg/Universal/Disk/DiskIoDxe/DiskIoDxe.inf
INF MdeModulePkg/Universal/Disk/PartitionDxe/PartitionDxe.inf
INF MdeModulePkg/Universal/Disk/RamDiskDxe/RamDiskDxe.inf
INF MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
INF USER MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
INF MdeModulePkg/Bus/Scsi/ScsiBusDxe/ScsiBusDxe.inf
INF MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf
INF MdeModulePkg/Bus/Pci/SataControllerDxe/SataControllerDxe.inf