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gahhh this looks awful

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rtldg 2025-03-13 05:28:32 +00:00
parent 623632d9b8
commit 13b3a8ec7d
1 changed files with 50 additions and 49 deletions
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99
core/sourcehook/sourcehook_hookmangen_x86_64.cpp
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@ -1078,62 +1078,63 @@ namespace SourceHook
}
}
if (stackSpace == 0) return 0;
stackSpace = AlignSize(stackSpace, 16);
m_HookFunc.sub(rsp, stackSpace);
// Actually push registers to stack...
reg_index = orig_reg_index;
floatreg_index = 0;
std::int32_t stack_offset = 0;
for (int i = 0; i < m_Proto.GetNumOfParams(); i++) {
const auto& info = m_Proto.GetParam(i);
if (info.type == PassInfo::PassType_Basic) {
if (++reg_index >= num_reg) {
m_HookFunc.lea(rax, rbp(OffsetToCallerStack + stack_offset));
m_HookFunc.mov(rax, rax());
m_HookFunc.mov(rsp(stack_offset), rax);
stack_offset += 8;
}
} else if (info.type == PassInfo::PassType_Float) {
if (++floatreg_index >= num_floatreg) {
m_HookFunc.lea(rax, rbp(OffsetToCallerStack + stack_offset));
m_HookFunc.mov(rax, rax());
m_HookFunc.mov(rsp(stack_offset), rax);
stack_offset += 8;
}
} else if (info.type == PassInfo::PassType_Object) {
if (info.flags & PassInfo::PassFlag_ByRef) {
if (stackSpace != 0)
{
stackSpace = AlignSize(stackSpace, 16);
m_HookFunc.sub(rsp, stackSpace);
// Actually push registers to stack...
reg_index = orig_reg_index;
floatreg_index = 0;
std::int32_t stack_offset = 0;
for (int i = 0; i < m_Proto.GetNumOfParams(); i++) {
const auto& info = m_Proto.GetParam(i);
if (info.type == PassInfo::PassType_Basic) {
if (++reg_index >= num_reg) {
m_HookFunc.lea(rax, rbp(OffsetToCallerStack + stack_offset));
m_HookFunc.mov(rax, rax());
m_HookFunc.mov(rsp(stack_offset), rax);
stack_offset += 8;
}
} else {
if (info.pAssignOperator || info.pCopyCtor) {
// 1st parameter (this)
m_HookFunc.lea(rdi, rbp(OffsetToCallerStack + stack_offset));
// 2nd parameter (copy)
m_HookFunc.lea(rsi, rsp(stack_offset));
// Move address and call
m_HookFunc.mov(rax, reinterpret_cast<std::uint64_t>(
info.pAssignOperator ? info.pAssignOperator : info.pCopyCtor));
m_HookFunc.call(rax);
} else {
// from
m_HookFunc.lea(rsi, rbp(OffsetToCallerStack + stack_offset));
// to
m_HookFunc.lea(rdi, rsp(stack_offset));
// size
m_HookFunc.mov(rcx, info.size);
// do the copy
m_HookFunc.rep_movs_bytes();
} else if (info.type == PassInfo::PassType_Float) {
if (++floatreg_index >= num_floatreg) {
m_HookFunc.lea(rax, rbp(OffsetToCallerStack + stack_offset));
m_HookFunc.mov(rax, rax());
m_HookFunc.mov(rsp(stack_offset), rax);
stack_offset += 8;
}
} else if (info.type == PassInfo::PassType_Object) {
if (info.flags & PassInfo::PassFlag_ByRef) {
if (++reg_index >= num_reg) {
m_HookFunc.lea(rax, rbp(OffsetToCallerStack + stack_offset));
m_HookFunc.mov(rax, rax());
m_HookFunc.mov(rsp(stack_offset), rax);
stack_offset += 8;
}
} else {
if (info.pAssignOperator || info.pCopyCtor) {
// 1st parameter (this)
m_HookFunc.lea(rdi, rbp(OffsetToCallerStack + stack_offset));
// 2nd parameter (copy)
m_HookFunc.lea(rsi, rsp(stack_offset));
// Move address and call
m_HookFunc.mov(rax, reinterpret_cast<std::uint64_t>(
info.pAssignOperator ? info.pAssignOperator : info.pCopyCtor));
m_HookFunc.call(rax);
} else {
// from
m_HookFunc.lea(rsi, rbp(OffsetToCallerStack + stack_offset));
// to
m_HookFunc.lea(rdi, rsp(stack_offset));
// size
m_HookFunc.mov(rcx, info.size);
// do the copy
m_HookFunc.rep_movs_bytes();
}
stack_offset += info.size;
}
stack_offset += info.size;
}
}
}