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macOS: Add async_io_kqueue; alloc LDT entry per thread

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This commit is contained in:
Luke Street
2025-11-09 23:25:46 -07:00
parent b166b4a41c
commit 76f97efe07
14 changed files with 1110 additions and 109 deletions
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56
src/main.cpp
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@@ -5,6 +5,7 @@
#include "heap.h"
#include "modules.h"
#include "processes.h"
#include "setup.h"
#include "strutil.h"
#include "tls.h"
#include "types.h"
@@ -14,23 +15,8 @@
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <fcntl.h>
#include <filesystem>
#include <memory>
#include <pthread.h>
#include <sys/mman.h>
#include <sys/syscall.h>
#include <unistd.h>
#ifdef __x86_64__
#include "setup.h"
#endif
#ifdef __linux__
#include <asm/ldt.h>
#include <asm/prctl.h>
#include <threads.h>
#endif
char **wibo::argv;
int wibo::argc;
@@ -104,41 +90,13 @@ bool wibo::installTibForCurrentThread(TEB *tibPtr) {
if (!tibPtr) {
return false;
}
currentThreadTeb = tibPtr;
#ifdef __x86_64__
tibEntryNumber = tebThreadSetup(tibEntryNumber, tibPtr);
if (tibEntryNumber < 0 || tibPtr->CurrentFsSelector == 0) {
perror("x86_64_thread_setup failed");
return false;
}
#else
struct user_desc desc;
std::memset(&desc, 0, sizeof(desc));
desc.entry_number = tibEntryNumber;
desc.base_addr = reinterpret_cast<uintptr_t>(tibPtr);
desc.limit = static_cast<unsigned int>(sizeof(TEB) - 1);
desc.seg_32bit = 1;
desc.contents = 0;
desc.read_exec_only = 0;
desc.limit_in_pages = 0;
desc.seg_not_present = 0;
desc.useable = 1;
if (syscall(SYS_set_thread_area, &desc) != 0) {
perror("set_thread_area failed");
return false;
}
if (tibEntryNumber != static_cast<int>(desc.entry_number)) {
tibEntryNumber = static_cast<int>(desc.entry_number);
DEBUG_LOG("set_thread_area: allocated entry=%d base=%p\n", tibEntryNumber, tibPtr);
} else {
DEBUG_LOG("set_thread_area: reused entry=%d base=%p\n", tibEntryNumber, tibPtr);
}
return tebThreadSetup(tibPtr);
}
tibPtr->CurrentFsSelector = static_cast<uint16_t>((desc.entry_number << 3) | 3);
tibPtr->CurrentGsSelector = 0;
#endif
return true;
void wibo::uninstallTebForCurrentThread() {
TEB* teb = std::exchange(currentThreadTeb, nullptr);
tebThreadTeardown(teb);
}
static std::string getExeName(const char *argv0) {
@@ -375,7 +333,7 @@ int main(int argc, char **argv) {
wibo::processPeb = peb;
wibo::initializeTibStackInfo(tib);
if (!wibo::installTibForCurrentThread(tib)) {
fprintf(stderr, "Failed to install TIB for main thread\n");
perror("Failed to install TIB for main thread");
return 1;
}