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Diffstat (limited to 'linuxthreads/pthread.c')
-rw-r--r--linuxthreads/pthread.c94
1 files changed, 71 insertions, 23 deletions
diff --git a/linuxthreads/pthread.c b/linuxthreads/pthread.c
index 313220e7a0..c7cfdac796 100644
--- a/linuxthreads/pthread.c
+++ b/linuxthreads/pthread.c
@@ -58,7 +58,13 @@ struct _pthread_descr_struct __pthread_initial_thread = {
NULL, /* char * p_in_sighandler */
0, /* char p_sigwaiting */
PTHREAD_START_ARGS_INITIALIZER, /* struct pthread_start_args p_start_args */
- {NULL} /* void * p_specific[PTHREAD_KEYS_MAX] */
+ {NULL}, /* void ** p_specific[PTHREAD_KEY_1STLEVEL_SIZE] */
+ {NULL}, /* void * p_libc_specific[_LIBC_TSD_KEY_N] */
+ 0, /* int p_userstack */
+ NULL, /* void * p_guardaddr */
+ 0, /* size_t p_guardsize */
+ &__pthread_initial_thread, /* pthread_descr p_self */
+ 0 /* Always index 0 */
};
/* Descriptor of the manager thread; none of this is used but the error
@@ -86,14 +92,20 @@ struct _pthread_descr_struct __pthread_manager_thread = {
0, /* char p_cancelstate */
0, /* char p_canceltype */
0, /* char p_canceled */
- NULL, /* int *p_errnop */
+ &__pthread_manager_thread.p_errno, /* int *p_errnop */
0, /* int p_errno */
NULL, /* int *p_h_errnop */
0, /* int p_h_errno */
NULL, /* char * p_in_sighandler */
0, /* char p_sigwaiting */
PTHREAD_START_ARGS_INITIALIZER, /* struct pthread_start_args p_start_args */
- {NULL} /* void * p_specific[PTHREAD_KEYS_MAX] */
+ {NULL}, /* void ** p_specific[PTHREAD_KEY_1STLEVEL_SIZE] */
+ {NULL}, /* void * p_libc_specific[_LIBC_TSD_KEY_N] */
+ 0, /* int p_userstack */
+ NULL, /* void * p_guardaddr */
+ 0, /* size_t p_guardsize */
+ &__pthread_manager_thread, /* pthread_descr p_self */
+ 1 /* Always index 1 */
};
/* Pointer to the main thread (the father of the thread manager thread) */
@@ -145,8 +157,13 @@ extern int _h_errno;
/* Forward declarations */
static void pthread_exit_process(int retcode, void *arg);
+#ifndef __i386__
static void pthread_handle_sigcancel(int sig);
static void pthread_handle_sigrestart(int sig);
+#else
+static void pthread_handle_sigcancel(int sig, struct sigcontext ctx);
+static void pthread_handle_sigrestart(int sig, struct sigcontext ctx);
+#endif
/* Initialize the pthread library.
Initialization is split in two functions:
@@ -189,7 +206,7 @@ static void pthread_initialize(void)
/* If we have special thread_self processing, initialize that for the
main thread now. */
#ifdef INIT_THREAD_SELF
- INIT_THREAD_SELF(&__pthread_initial_thread);
+ INIT_THREAD_SELF(&__pthread_initial_thread, 0);
#endif
/* The errno/h_errno variable of the main thread are the global ones. */
__pthread_initial_thread.p_errnop = &_errno;
@@ -209,12 +226,20 @@ static void pthread_initialize(void)
/* Setup signal handlers for the initial thread.
Since signal handlers are shared between threads, these settings
will be inherited by all other threads. */
+#ifndef __i386__
sa.sa_handler = pthread_handle_sigrestart;
+#else
+ sa.sa_handler = (__sighandler_t) pthread_handle_sigrestart;
+#endif
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART; /* does not matter for regular threads, but
better for the thread manager */
__sigaction(__pthread_sig_restart, &sa, NULL);
+#ifndef __i386__
sa.sa_handler = pthread_handle_sigcancel;
+#else
+ sa.sa_handler = (__sighandler_t) pthread_handle_sigcancel;
+#endif
sa.sa_flags = 0;
__sigaction(__pthread_sig_cancel, &sa, NULL);
@@ -254,8 +279,11 @@ int __pthread_initialize_manager(void)
}
/* Start the thread manager */
pid = __clone(__pthread_manager, (void **) __pthread_manager_thread_tos,
- CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND,
- (void *)(long)manager_pipe[0]);
+ CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND
+#ifdef CLONE_PTRACE
+ | CLONE_PTRACE
+#endif
+ , (void *)(long)manager_pipe[0]);
if (pid == -1) {
free(__pthread_manager_thread_bos);
__libc_close(manager_pipe[0]);
@@ -292,8 +320,9 @@ int __pthread_create_2_1(pthread_t *thread, const pthread_attr_t *attr,
&request.req_args.create.mask);
__libc_write(__pthread_manager_request, (char *) &request, sizeof(request));
suspend(self);
- if (self->p_retcode == 0) *thread = (pthread_t) self->p_retval;
- return self->p_retcode;
+ if (THREAD_GETMEM(self, p_retcode) == 0)
+ *thread = (pthread_t) THREAD_GETMEM(self, p_retval);
+ return THREAD_GETMEM(self, p_retcode);
}
#if defined HAVE_ELF && defined PIC && defined DO_VERSIONING
@@ -330,7 +359,7 @@ strong_alias (__pthread_create_2_1, pthread_create)
pthread_t pthread_self(void)
{
pthread_descr self = thread_self();
- return self->p_tid;
+ return THREAD_GETMEM(self, p_tid);
}
int pthread_equal(pthread_t thread1, pthread_t thread2)
@@ -347,9 +376,9 @@ pthread_descr __pthread_find_self()
char * sp = CURRENT_STACK_FRAME;
pthread_handle h;
- /* __pthread_handles[0] is the initial thread, handled specially in
- thread_self(), so start at 1 */
- h = __pthread_handles + 1;
+ /* __pthread_handles[0] is the initial thread, __pthread_handles[1] is
+ the manager threads handled specially in thread_self(), so start at 2 */
+ h = __pthread_handles + 2;
while (! (sp <= (char *) h->h_descr && sp >= h->h_bottom)) h++;
return h->h_descr;
}
@@ -428,14 +457,23 @@ static void pthread_exit_process(int retcode, void *arg)
For the thread manager thread, redirect the signal to
__pthread_manager_sighandler. */
+#ifndef __i386__
static void pthread_handle_sigrestart(int sig)
{
pthread_descr self = thread_self();
+#else
+static void pthread_handle_sigrestart(int sig, struct sigcontext ctx)
+{
+ pthread_descr self;
+ asm volatile ("movw %w0,%%gs" : : "r" (ctx.gs));
+ self = thread_self();
+#endif
if (self == &__pthread_manager_thread) {
__pthread_manager_sighandler(sig);
} else {
- self->p_signal = sig;
- if (self->p_signal_jmp != NULL) siglongjmp(*self->p_signal_jmp, 1);
+ THREAD_SETMEM(self, p_signal, sig);
+ if (THREAD_GETMEM(self, p_signal_jmp) != NULL)
+ siglongjmp(*THREAD_GETMEM(self, p_signal_jmp), 1);
}
}
@@ -451,10 +489,19 @@ static void pthread_handle_sigrestart(int sig)
know what it is specifically done for. In the current implementation,
the thread manager simply discards it. */
+#ifndef __i386__
static void pthread_handle_sigcancel(int sig)
{
pthread_descr self = thread_self();
sigjmp_buf * jmpbuf;
+#else
+static void pthread_handle_sigcancel(int sig, struct sigcontext ctx)
+{
+ pthread_descr self;
+ sigjmp_buf * jmpbuf;
+ asm volatile ("movw %w0,%%gs" : : "r" (ctx.gs));
+ self = thread_self();
+#endif
if (self == &__pthread_manager_thread)
return;
@@ -465,12 +512,13 @@ static void pthread_handle_sigcancel(int sig)
waitpid(__pthread_manager_thread.p_pid, NULL, __WCLONE);
_exit(__pthread_exit_code);
}
- if (self->p_canceled && self->p_cancelstate == PTHREAD_CANCEL_ENABLE) {
- if (self->p_canceltype == PTHREAD_CANCEL_ASYNCHRONOUS)
+ if (THREAD_GETMEM(self, p_canceled)
+ && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE) {
+ if (THREAD_GETMEM(self, p_canceltype) == PTHREAD_CANCEL_ASYNCHRONOUS)
pthread_exit(PTHREAD_CANCELED);
- jmpbuf = self->p_cancel_jmp;
+ jmpbuf = THREAD_GETMEM(self, p_cancel_jmp);
if (jmpbuf != NULL) {
- self->p_cancel_jmp = NULL;
+ THREAD_SETMEM(self, p_cancel_jmp, NULL);
siglongjmp(*jmpbuf, 1);
}
}
@@ -496,14 +544,14 @@ void __pthread_reset_main_thread()
__pthread_manager_request = __pthread_manager_reader = -1;
}
/* Update the pid of the main thread */
- self->p_pid = __getpid();
+ THREAD_SETMEM(self, p_pid, __getpid());
/* Make the forked thread the main thread */
__pthread_main_thread = self;
- self->p_nextlive = self;
- self->p_prevlive = self;
+ THREAD_SETMEM(self, p_nextlive, self);
+ THREAD_SETMEM(self, p_prevlive, self);
/* Now this thread modifies the global variables. */
- self->p_errnop = &_errno;
- self->p_h_errnop = &_h_errno;
+ THREAD_SETMEM(self, p_errnop, &_errno);
+ THREAD_SETMEM(self, p_h_errnop, &_h_errno);
}
/* Process-wide exec() request */
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-05 02:18:55 +0000