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loader: TLS patch fix

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This commit is contained in:
nmzik
2026-09-01 08:06:09 +04:00
parent dd062ceeeb
commit 2333c235f1
1 changed files with 5 additions and 8 deletions
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src/loader/runtimeLinker.cpp
+5 -8
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@@ -1166,7 +1166,6 @@ static void PatchProgram(Program* program, uint64_t address, uint64_t size) {
prefix_count++;
}
const size_t inst_size = prefix_count + Jit::Call9::GetSize();
if (inst_ptr + Jit::Call9::GetSize() > start_ptr + size) {
break;
}
@@ -1175,20 +1174,18 @@ static void PatchProgram(Program* program, uint64_t address, uint64_t size) {
if (memcmp(inst_ptr, tls_pattern, 3) == 0 && (modrm & 0xc7u) == 0x04u &&
inst_ptr[4] == tls_pattern[4] &&
*reinterpret_cast<const uint32_t*>(inst_ptr + 5) == 0) {
LOGF("Patch tls at addr: [%016" PRIx64 "]\n", reinterpret_cast<uint64_t>(ptr));
LOGF("Patch tls at addr: [%016" PRIx64 "]\n",
reinterpret_cast<uint64_t>(inst_ptr));
const auto reg = (modrm >> 3u) & 7u;
EXIT_NOT_IMPLEMENTED(reg == 4u);
auto* code = new (ptr) Jit::Call9;
// A raw scan can encounter a 0x66 in the preceding instruction.
auto* code = new (inst_ptr) Jit::Call9;
code->SetFunc(reg == 0
? program->tls.handler_vaddr
: program->tls.handler_vaddr + Jit::TlsRegStub::GetOffset(reg));
if (inst_size > Jit::Call9::GetSize()) {
std::memset(ptr + Jit::Call9::GetSize(), 0x90,
inst_size - Jit::Call9::GetSize());
}
ptr += inst_size - 1;
ptr += prefix_count + Jit::Call9::GetSize() - 1;
}
}
}