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Use nonvolatile registers for storage

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mkrsym1 2023-06-26 12:18:25 +03:00
parent a0e79dcea0
commit 851ebb5b9a
2 changed files with 35 additions and 29 deletions
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45
injector/src/game_p.asm
View File

@ -1,65 +1,70 @@
BITS 64 BITS 64
main: ; Replacement entry point main: ; Replacement entry point
push rbp push rsi
mov rbp, rsp push rdi
sub rsp, 30h + 90h push r12
push r13
push r14
call GetKernel32ModuleHandle call GetKernel32ModuleHandle
mov [rbp - 8h], rax ; kernel32.dll mov rsi, rax ; kernel32.dll
mov rcx, rax mov rcx, rax
call GetAddressOf_GetProcAddress call GetAddressOf_GetProcAddress
mov [rbp - 10h], rax ; *GetProcAddress mov rdi, rax ; *GetProcAddress
mov rcx, [rbp - 8h] ; kernel32.dll mov rcx, rsi ; kernel32.dll
lea rdx, [rel s_LoadLibraryA] lea rdx, [rel s_LoadLibraryA]
mov rax, [rbp - 10h] ; *GetProcAddress mov rax, rdi ; *GetProcAddress
call rax ; rax = *LoadLibraryA call rax ; rax = *LoadLibraryA
lea rcx, [rel dllPath] lea rcx, [rel dllPath]
call rax ; LoadLibraryA(dllPath) call rax ; LoadLibraryA(dllPath)
mov rcx, [rbp - 8h] ; kernel32.dll mov rcx, rsi ; kernel32.dll
lea rdx, [rel s_GetModuleHandleA] lea rdx, [rel s_GetModuleHandleA]
mov rax, [rbp - 10h] ; *GetProcAddress mov rax, rdi ; *GetProcAddress
call rax ; rax = *GetModuleHandle call rax ; rax = *GetModuleHandle
mov [rbp - 18h], rax mov r12, rax
mov rcx, 0 mov rcx, 0
call rax ; rax = .exe base address call rax ; rax = .exe base address
mov [rbp - 20h], rax mov r13, rax
mov rcx, [rbp - 8h] ; kernel32.dll mov rcx, rsi ; kernel32.dll
lea rdx, [rel s_GetCommandLineW] lea rdx, [rel s_GetCommandLineW]
mov rax, [rbp - 10h] ; *GetProcAddress mov rax, rdi ; *GetProcAddress
call rax ; rax = *GetCommandLineW call rax ; rax = *GetCommandLineW
call rax ; rax = command line call rax ; rax = command line
mov [rbp - 28h], rax mov r14, rax
lea rcx, [rel s_UnityPlayer.dll] lea rcx, [rel s_UnityPlayer.dll]
mov rax, [rbp - 18h] ; *GetModuleHandleA mov rax, r12 ; *GetModuleHandleA
call rax ; rax = UnityPlayer.dll call rax ; rax = UnityPlayer.dll
mov rcx, rax mov rcx, rax
lea rdx, [rel s_UnityMain] lea rdx, [rel s_UnityMain]
mov rax, [rbp - 10h] ; *GetProcAddress mov rax, rdi ; *GetProcAddress
call rax ; rax = *UnityMain call rax ; rax = *UnityMain
mov rcx, [rbp - 20h] ; .exe base address mov rcx, r13 ; .exe base address
mov rdx, 0 ; hPrevInstance - 0 mov rdx, 0 ; hPrevInstance - 0
mov r8, [rbp - 28h] ; command line mov r8, r14 ; command line
mov r9, 1 ; SW_NORMAL mov r9, 1 ; SW_NORMAL
call rax ; UnityMain(...) call rax ; UnityMain(...)
add rsp, 30h + 90h pop r14
pop rbp pop r13
pop r12
pop rdi
pop rsi
ret ret

19
injector/src/launcher_p.asm
View File

@ -1,30 +1,31 @@
BITS 64 BITS 64
main: ; Replacement entry point main: ; Replacement entry point
push rbp push rsi
mov rbp, rsp push rdi
sub rsp, 10h + 90h sub rsp, 8h
call GetKernel32ModuleHandle call GetKernel32ModuleHandle
mov [rbp - 8h], rax ; kernel32.dll mov rsi, rax ; kernel32.dll
mov rcx, rax mov rcx, rax
call GetAddressOf_GetProcAddress call GetAddressOf_GetProcAddress
mov [rbp - 10h], rax ; *GetProcAddress mov rdi, rax ; *GetProcAddress
mov rcx, [rbp - 8h] ; kernel32.dll mov rcx, rsi ; kernel32.dll
lea rdx, [rel s_LoadLibraryA] lea rdx, [rel s_LoadLibraryA]
mov rax, [rbp - 10h] ; *GetProcAddress mov rax, rdi ; *GetProcAddress
call rax ; rax = *LoadLibraryA call rax ; rax = *LoadLibraryA
lea rcx, [rel dllPath] lea rcx, [rel dllPath]
call rax ; LoadLibraryA(dllPath) call rax ; LoadLibraryA(dllPath)
add rsp, 10h + 90h add rsp, 8h
pop rbp pop rdi
pop rsi
ret ret