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core: Properly implement TLS (#164)

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* core: Split module code from linker

* linker: Properly implement thread local storage

* kernel: Fix a few memory functions

* kernel: Implement module loading

* Now it's easy to do anyway with new module rework
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TheTurtle 2024-06-05 22:08:18 +03:00 • committed by GitHub
parent 7d61b7ab9b
commit 728249f58d
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26 changed files with 1047 additions and 823 deletions
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17
src/core/tls.cpp
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@ -44,13 +44,15 @@ constexpr static TLSPattern TlsPatterns[] = {
#ifdef _WIN32
static DWORD slot = 0;
void SetTLSStorage(u64 image_address) {
// Guest apps will use both positive and negative offsets to the TLS pointer.
// User data at probably in negative offsets, while pthread data at positive offset.
const BOOL result = TlsSetValue(slot, reinterpret_cast<LPVOID>(image_address));
void SetTcbBase(void* image_address) {
const BOOL result = TlsSetValue(slot, image_address);
ASSERT(result != 0);
}
Tcb* GetTcbBase() {
return reinterpret_cast<Tcb*>(TlsGetValue(slot));
}
void PatchTLS(u64 segment_addr, u64 segment_size, Xbyak::CodeGenerator& c) {
using namespace Xbyak::util;
@ -81,6 +83,7 @@ void PatchTLS(u64 segment_addr, u64 segment_size, Xbyak::CodeGenerator& c) {
std::memcpy(&offset, code + tls_pattern.pattern_size, sizeof(u64));
LOG_INFO(Core_Linker, "PATTERN64 FOUND at {}, reg: {} offset: {:#x}",
fmt::ptr(code), tls_pattern.target_reg, offset);
continue;
}
ASSERT(offset == 0);
@ -132,7 +135,11 @@ void PatchTLS(u64 segment_addr, u64 segment_size, Xbyak::CodeGenerator& c) {
#else
void SetTLSStorage(u64 image_address) {
void SetTcbBase(void* image_address) {
UNREACHABLE_MSG("Thread local storage is unimplemented on posix platforms!");
}
Tcb* GetTcbBase() {
UNREACHABLE_MSG("Thread local storage is unimplemented on posix platforms!");
}