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Initial guest-to-host trampoline generation

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This commit is contained in:
Luke Street
2025-10-30 02:23:09 -06:00
parent 9367f003c5
commit 55a62a27c9
85 changed files with 1750 additions and 1807 deletions
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32
src/main.cpp
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@@ -51,18 +51,18 @@ void wibo::debug_log(const char *fmt, ...) {
va_end(args);
}
TIB *wibo::allocateTib() {
auto *newTib = static_cast<TIB *>(std::calloc(1, sizeof(TIB)));
TEB *wibo::allocateTib() {
auto *newTib = static_cast<TEB *>(std::calloc(1, sizeof(TEB)));
if (!newTib) {
return nullptr;
}
tls::initializeTib(newTib);
newTib->self = newTib;
newTib->peb = processPeb;
newTib->Tib.Self = &newTib->Tib;
newTib->Peb = processPeb;
return newTib;
}
void wibo::destroyTib(TIB *tibPtr) {
void wibo::destroyTib(TEB *tibPtr) {
if (!tibPtr) {
return;
}
@@ -70,7 +70,7 @@ void wibo::destroyTib(TIB *tibPtr) {
std::free(tibPtr);
}
void wibo::initializeTibStackInfo(TIB *tibPtr) {
void wibo::initializeTibStackInfo(TEB *tibPtr) {
if (!tibPtr) {
return;
}
@@ -82,16 +82,16 @@ void wibo::initializeTibStackInfo(TIB *tibPtr) {
void *stackAddr = nullptr;
size_t stackSize = 0;
if (pthread_attr_getstack(&attr, &stackAddr, &stackSize) == 0 && stackAddr && stackSize > 0) {
tibPtr->stackLimit = stackAddr;
tibPtr->stackBase = static_cast<char *>(stackAddr) + stackSize;
tibPtr->Tib.StackLimit = stackAddr;
tibPtr->Tib.StackBase = static_cast<char *>(stackAddr) + stackSize;
} else {
perror("Failed to get thread stack info");
}
DEBUG_LOG("initializeTibStackInfo: stackBase=%p stackLimit=%p\n", tibPtr->stackBase, tibPtr->stackLimit);
DEBUG_LOG("initializeTibStackInfo: stackBase=%p stackLimit=%p\n", tibPtr->Tib.StackBase, tibPtr->Tib.StackLimit);
pthread_attr_destroy(&attr);
}
bool wibo::installTibForCurrentThread(TIB *tibPtr) {
bool wibo::installTibForCurrentThread(TEB *tibPtr) {
if (!tibPtr) {
return false;
}
@@ -99,7 +99,7 @@ bool wibo::installTibForCurrentThread(TIB *tibPtr) {
std::memset(&desc, 0, sizeof(desc));
desc.entry_number = tibEntryNumber;
desc.base_addr = reinterpret_cast<unsigned int>(tibPtr);
desc.limit = static_cast<unsigned int>(sizeof(TIB) - 1);
desc.limit = static_cast<unsigned int>(sizeof(TEB) - 1);
desc.seg_32bit = 1;
desc.contents = 0;
desc.read_exec_only = 0;
@@ -121,7 +121,7 @@ bool wibo::installTibForCurrentThread(TIB *tibPtr) {
}
// Make this global to ease debugging
TIB tib;
TEB tib;
const size_t MAPS_BUFFER_SIZE = 0x10000;
@@ -453,11 +453,11 @@ int main(int argc, char **argv) {
// Create TIB
memset(&tib, 0, sizeof(tib));
wibo::tls::initializeTib(&tib);
tib.self = &tib;
tib.peb = static_cast<PEB *>(calloc(1, sizeof(PEB)));
tib.peb->ProcessParameters =
tib.Tib.Self = &tib.Tib;
tib.Peb = static_cast<PEB *>(calloc(1, sizeof(PEB)));
tib.Peb->ProcessParameters =
static_cast<RTL_USER_PROCESS_PARAMETERS *>(calloc(1, sizeof(RTL_USER_PROCESS_PARAMETERS)));
wibo::processPeb = tib.peb;
wibo::processPeb = tib.Peb;
wibo::initializeTibStackInfo(&tib);
if (!wibo::installTibForCurrentThread(&tib)) {
fprintf(stderr, "Failed to install TIB for main thread\n");