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Add some Linux64 stack alignment too

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This commit is contained in:
rtldg 2025-03-02 09:21:59 +00:00
parent ed7d51f5c2
commit 1bde664928
1 changed files with 13 additions and 1 deletions
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14
extensions/dhooks/DynamicHooks/hook.cpp
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@ -363,6 +363,8 @@ void CHook::Write_ModifyReturnAddress(x64JitWriter& jit)
// Shadow space 32 bytes + 8 bytes to keep it aligned on 16 bytes
MSVC_ONLY(jit.sub(rsp, 40));
// We need to keep it aligned to 16 bytes on Linux too...
GCC_ONLY(jit.sub(rsp, 8));
// 1st param (this)
GCC_ONLY(jit.mov(rdi, reinterpret_cast<std::uint64_t>(this)));
@ -380,6 +382,8 @@ void CHook::Write_ModifyReturnAddress(x64JitWriter& jit)
jit.mov(rax, func.address);
jit.call(rax);
// Free Linux stack alignemnt
GCC_ONLY(jit.add(rsp, 8));
// Free shadow space
MSVC_ONLY(jit.add(rsp, 40));
@ -419,12 +423,14 @@ void CHook::CreatePostCallback()
// Shadow space 32 bytes + 8 bytes to keep it aligned on 16 bytes
MSVC_ONLY(jit.sub(rsp, 40));
// We need to keep it aligned to 16 bytes on Linux too...
GCC_ONLY(jit.sub(rsp, 8));
// 1st param (this)
GCC_ONLY(jit.mov(rdi, reinterpret_cast<std::uint64_t>(this)));
MSVC_ONLY(jit.mov(rcx, reinterpret_cast<std::uint64_t>(this)));
// 2n parameter (rsp)
// 2nd parameter (rsp)
GCC_ONLY(jit.lea(rsi, rsp()));
MSVC_ONLY(jit.lea(rdx, rsp(40)));
@ -432,6 +438,8 @@ void CHook::CreatePostCallback()
jit.mov(rax, func.address);
jit.call(rax);
// Free Linux stack alignemnt
GCC_ONLY(jit.add(rsp, 8));
// Free shadow space
MSVC_ONLY(jit.add(rsp, 40));
@ -452,6 +460,8 @@ void CHook::Write_CallHandler(x64JitWriter& jit, HookType_t type)
// Shadow space 32 bytes + 8 bytes to keep it aligned on 16 bytes
MSVC_ONLY(jit.sub(rsp, 40));
// We need to keep it aligned to 16 bytes on Linux too...
GCC_ONLY(jit.sub(rsp, 8));
// Call the global hook handler
@ -466,6 +476,8 @@ void CHook::Write_CallHandler(x64JitWriter& jit, HookType_t type)
jit.mov(rax, func.address);
jit.call(rax);
// Free Linux stack alignemnt
GCC_ONLY(jit.add(rsp, 8));
// Free shadow space
MSVC_ONLY(jit.add(rsp, 40));
}