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LibC: Cleanup uthread initialization

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This is now done in a constructor function in pthread.cpp
This commit is contained in:
Bananymous
2026-07-02 19:42:28 +03:00
parent 991f7024d5
commit 7bdd9d19d0
2 changed files with 25 additions and 39 deletions
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22
userspace/libraries/LibC/pthread.cpp
View File

@@ -3,9 +3,6 @@
#include <BAN/Debug.h>
#include <BAN/PlacementNew.h>
#include <kernel/Arch.h>
#include <kernel/Thread.h>
#include <errno.h>
#include <pthread.h>
#include <stdlib.h>
@@ -33,21 +30,32 @@ static void _pthread_cancel_handler(int)
}
__attribute__((constructor))
static void _install_main_thread_cancel_handler()
static void _init_pthread()
{
uthread* uthread = _get_uthread();
uthread->id = syscall(SYS_THREAD_GETID);
uthread->attr = s_default_pthread_attr;
uthread->errno_ = 0;
uthread->cancel_type = PTHREAD_CANCEL_DEFERRED;
uthread->cancel_state = PTHREAD_CANCEL_ENABLE;
uthread->canceled = false;
uthread->cleanup_funcs = nullptr;
memset(uthread->specific_keys, 0, sizeof(uthread->specific_keys));
memset(uthread->specific_vals, 0, sizeof(uthread->specific_vals));
signal(SIGCANCEL, &_pthread_cancel_handler);
}
// stack is 16 byte aligned on entry, this `call` is used to align it
extern "C" void _pthread_trampoline(void*);
asm(
#if ARCH(x86_64)
#if defined(__x86_64__)
"_pthread_trampoline:"
"popq %rdi;"
"andq $-16, %rsp;"
"xorq %rbp, %rbp;"
"call _pthread_trampoline_cpp"
#elif ARCH(i686)
#elif defined(__i686__)
"_pthread_trampoline:"
"popl %edi;"
"andl $-16, %esp;"
@@ -1322,7 +1330,7 @@ extern "C" void* __tls_get_addr(tls_index* ti)
return reinterpret_cast<void*>(uthread->dtv[ti->ti_module] + ti->ti_offset);
}
#if ARCH(i686)
#if defined(__i686__)
extern "C" void* __attribute__((__regparm__(1))) ___tls_get_addr(tls_index* ti)
{
auto* uthread = _get_uthread();

42
userspace/libraries/LibC/unistd.cpp
View File

@@ -58,42 +58,20 @@ extern "C" void _init_libc(char** environ, init_funcs_t init_funcs, init_funcs_t
::environ = environ;
#if defined(__x86_64__)
if (uthread* self = reinterpret_cast<uthread*>(syscall(SYS_GET_FSBASE)))
if (syscall(SYS_GET_FSBASE) == 0)
#elif defined(__i686__)
if (uthread* self = reinterpret_cast<uthread*>(syscall(SYS_GET_GSBASE)))
if (syscall(SYS_GET_GSBASE) == 0)
#else
#error
#endif
{
self->id = syscall(SYS_THREAD_GETID);
self->errno_ = 0;
self->cancel_type = PTHREAD_CANCEL_DEFERRED;
self->cancel_state = PTHREAD_CANCEL_ENABLE;
self->canceled = false;
self->cleanup_funs = nullptr;
}
else
{
alignas(uthread) static uint8_t storage[sizeof(uthread)];
uthread& uthread = *reinterpret_cast<struct uthread*>(storage);
uthread = {
.self = &uthread,
.master_tls_addr = nullptr,
.master_tls_size = 0,
.master_tls_module_count = 1,
.dynamic_tls = nullptr,
.id = static_cast<pthread_t>(syscall(SYS_THREAD_GETID)),
.errno_ = 0,
.cancel_type = PTHREAD_CANCEL_DEFERRED,
.cancel_state = PTHREAD_CANCEL_ENABLE,
.canceled = false,
.cleanup_funs = nullptr,
.specific_keys = {},
.specific_vals = {},
.dtv = { 0 },
};
static uthread uthread {};
uthread.self = &uthread;
uthread.master_tls_addr = nullptr;
uthread.master_tls_size = 0;
uthread.master_tls_module_count = 0;
uthread.dynamic_tls = nullptr;
uthread.dtv[0] = 0;
#if defined(__x86_64__)
syscall(SYS_SET_FSBASE, &uthread);
#elif defined(__i686__)
@@ -108,7 +86,7 @@ extern "C" void _init_libc(char** environ, init_funcs_t init_funcs, init_funcs_t
sigset_t ss;
sigemptyset(&ss);
struct sigaction sa {
const struct sigaction sa {
.sa_sigaction = __dump_backtrace,
.sa_mask = ss,
.sa_flags = SA_RESETHAND | SA_SIGINFO,