1 #include <unistd.h> 2 #include <string.h> 3 #include <signal.h> 4 #include "syscall.h" 5 #include "libc.h" 6 #include "pthread_impl.h" 7 dummy(int x)8static void dummy(int x) 9 { 10 } 11 12 weak_alias(dummy, __fork_handler); 13 fork(void)14pid_t fork(void) 15 { 16 pid_t ret; 17 sigset_t set; 18 __fork_handler(-1); 19 __block_all_sigs(&set); 20 #ifdef SYS_fork 21 ret = __syscall(SYS_fork); 22 #else 23 ret = __syscall(SYS_clone, SIGCHLD, 0); 24 #endif 25 if (!ret) { 26 pthread_t self = __pthread_self(); 27 self->tid = __syscall(SYS_gettid); 28 self->robust_list.off = 0; 29 self->robust_list.pending = 0; 30 self->next = self->prev = self; 31 __thread_list_lock = 0; 32 libc.threads_minus_1 = 0; 33 libc.exit = 0; 34 signal(SIGSYS, arm_do_signal); 35 } 36 __restore_sigs(&set); 37 __fork_handler(!ret); 38 return __syscall_ret(ret); 39 } 40