CloverBootloader/MemoryFix/OsxAptioFixDrv/X64/RTShims.nasm

138 lines
3.4 KiB
NASM
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BITS 64
DEFAULT REL
%macro ConstructShim 1
%if %1 > 5
%error "At Most 5 Args Supported."
%endif
push rsi
push rbx
sub rsp, 0x28
pushfq
cli
pop rsi
push rax
mov rbx, cr0
mov rax, rbx
and rax, 0xfffffffffffeffff
mov cr0, rax
%if %1 > 4
mov rax, qword [rsp+0x68]
mov qword [rsp+0x28], rax
%endif
pop rax
call rax
add rsp, 0x28
test ebx, 0x10000
je .SKIP_RESTORE_WP
mov cr0, rbx
.SKIP_RESTORE_WP:
pop rbx
test si, 0x200
pop rsi
je .SKIP_RESTORE_INTR
sti
.SKIP_RESTORE_INTR:
ret
%endmacro
SECTION .text
ALIGN 8 ; to align the dqs
global ASM_PFX(gRTShimsDataStart)
ASM_PFX(gRTShimsDataStart):
global ASM_PFX(RTShimSetVariable)
ASM_PFX(RTShimSetVariable):
mov rax, qword [ASM_PFX(gSetVariable)]
jmp short FiveArgsShim
global ASM_PFX(RTShimGetVariable)
ASM_PFX(RTShimGetVariable):
; Until boot.efi virtualizes the pointers we use a custom wrapper.
mov rax, qword [ASM_PFX(gGetVariableBoot)]
test rax, rax
jnz .USE_CURRENT_FUNC
mov rax, qword [ASM_PFX(gGetVariable)]
.USE_CURRENT_FUNC:
;jmp short FiveArgsShim
; fall through to FiveArgsShim
FiveArgsShim:
ConstructShim 5
global ASM_PFX(RTShimGetNextVariableName)
ASM_PFX(RTShimGetNextVariableName):
mov rax, qword [ASM_PFX(gGetNextVariableName)]
jmp short FourArgsShim
global ASM_PFX(RTShimGetTime)
ASM_PFX(RTShimGetTime):
mov rax, qword [ASM_PFX(gGetTime)]
jmp short FourArgsShim
global ASM_PFX(RTShimSetTime)
ASM_PFX(RTShimSetTime):
mov rax, qword [ASM_PFX(gSetTime)]
jmp short FourArgsShim
global ASM_PFX(RTShimGetWakeupTime)
ASM_PFX(RTShimGetWakeupTime):
mov rax, qword [ASM_PFX(gGetWakeupTime)]
jmp short FourArgsShim
global ASM_PFX(RTShimSetWakeupTime)
ASM_PFX(RTShimSetWakeupTime):
mov rax, qword [ASM_PFX(gSetWakeupTime)]
jmp short FourArgsShim
global ASM_PFX(RTShimGetNextHighMonoCount)
ASM_PFX(RTShimGetNextHighMonoCount):
mov rax, qword [ASM_PFX(gGetNextHighMonoCount)]
jmp short FourArgsShim
global ASM_PFX(RTShimResetSystem)
ASM_PFX(RTShimResetSystem):
mov rax, qword [ASM_PFX(gResetSystem)] ; Note - doesn't return!
;jmp short FourArgsShim
; fall through to FourArgsShim
FourArgsShim:
ConstructShim 4
ALIGN 8
global ASM_PFX(gGetNextVariableName)
ASM_PFX(gGetNextVariableName): dq 0
global ASM_PFX(gGetVariable)
ASM_PFX(gGetVariable): dq 0
global ASM_PFX(gSetVariable)
ASM_PFX(gSetVariable): dq 0
global ASM_PFX(gGetTime)
ASM_PFX(gGetTime): dq 0
global ASM_PFX(gSetTime)
ASM_PFX(gSetTime): dq 0
global ASM_PFX(gGetWakeupTime)
ASM_PFX(gGetWakeupTime): dq 0
global ASM_PFX(gSetWakeupTime)
ASM_PFX(gSetWakeupTime): dq 0
global ASM_PFX(gGetNextHighMonoCount)
ASM_PFX(gGetNextHighMonoCount): dq 0
global ASM_PFX(gResetSystem)
ASM_PFX(gResetSystem): dq 0
global ASM_PFX(gGetVariableBoot)
ASM_PFX(gGetVariableBoot): dq 0
global ASM_PFX(gRTShimsDataEnd)
ASM_PFX(gRTShimsDataEnd):