diff options
Diffstat (limited to 'lib/libpthread/thread/thr_init.c')
| -rw-r--r-- | lib/libpthread/thread/thr_init.c | 54 |
1 files changed, 25 insertions, 29 deletions
diff --git a/lib/libpthread/thread/thr_init.c b/lib/libpthread/thread/thr_init.c index 3cbd453d3e27..35731c42cbd6 100644 --- a/lib/libpthread/thread/thr_init.c +++ b/lib/libpthread/thread/thr_init.c @@ -92,7 +92,7 @@ _thread_init(void) int mib[2]; struct clockinfo clockinfo; struct sigaction act; - struct itimerval itimer; + struct sigaltstack alt; /* Check if this function has already been called: */ if (_thread_initial) @@ -133,7 +133,7 @@ _thread_init(void) /* * Create a pipe that is written to by the signal handler to prevent - * signals being missed in calls to _select: + * signals being missed in calls to _select: */ if (_thread_sys_pipe(_thread_kern_pipe) != 0) { /* Cannot create pipe, so abort: */ @@ -168,12 +168,12 @@ _thread_init(void) else if ((_thread_initial = (pthread_t) malloc(sizeof(struct pthread))) == NULL) { /* * Insufficient memory to initialise this application, so - * abort: + * abort: */ PANIC("Cannot allocate memory for initial thread"); } /* Allocate memory for the scheduler stack: */ - else if ((_thread_kern_sched_stack = malloc(PAGE_SIZE * 10)) == NULL) + else if ((_thread_kern_sched_stack = malloc(SCHED_STACK_SIZE)) == NULL) PANIC("Failed to allocate stack for scheduler"); else { /* Zero the global kernel thread structure: */ @@ -217,8 +217,8 @@ _thread_init(void) /* Setup the context for the scheduler: */ _setjmp(_thread_kern_sched_jb); - SET_STACK_JB(_thread_kern_sched_jb, - _thread_kern_sched_stack + PAGE_SIZE*10 - sizeof(double)); + SET_STACK_JB(_thread_kern_sched_jb, _thread_kern_sched_stack + + SCHED_STACK_SIZE - sizeof(double)); SET_RETURN_ADDR_JB(_thread_kern_sched_jb, _thread_kern_scheduler); /* @@ -253,12 +253,9 @@ _thread_init(void) /* Initialize last active: */ _thread_initial->last_active = (long) _sched_ticks; - /* Initialize the initial signal frame: */ - _thread_initial->sigframes[0] = &_thread_initial->sigframe0; - _thread_initial->curframe = &_thread_initial->sigframe0; - _thread_initial->curframe->ctxtype = CTX_JB_NOSIG; - /* Set the base of the stack: */ - _thread_initial->curframe->stackp = (unsigned long) USRSTACK; + /* Initialize the initial context: */ + _thread_initial->curframe = NULL; + _thread_initial->ctxtype = CTX_JB_NOSIG; /* Initialise the rest of the fields: */ _thread_initial->poll_data.nfds = 0; @@ -276,7 +273,7 @@ _thread_init(void) /* Initialise the global signal action structure: */ sigfillset(&act.sa_mask); act.sa_handler = (void (*) ()) _thread_sig_handler; - act.sa_flags = SA_SIGINFO; + act.sa_flags = SA_SIGINFO | SA_ONSTACK; /* Clear pending signals for the process: */ sigemptyset(&_process_sigpending); @@ -284,6 +281,13 @@ _thread_init(void) /* Clear the signal queue: */ memset(_thread_sigq, 0, sizeof(_thread_sigq)); + /* Create and install an alternate signal stack: */ + alt.ss_sp = malloc(SIGSTKSZ); /* recommended stack size */ + alt.ss_size = SIGSTKSZ; + alt.ss_flags = 0; + if (_thread_sys_sigaltstack(&alt, NULL) != 0) + PANIC("Unable to install alternate signal stack"); + /* Enter a loop to get the existing signal status: */ for (i = 1; i < NSIG; i++) { /* Check for signals which cannot be trapped: */ @@ -295,7 +299,7 @@ _thread_init(void) &_thread_sigact[i - 1]) != 0) { /* * Abort this process if signal - * initialisation fails: + * initialisation fails: */ PANIC("Cannot read signal handler info"); } @@ -313,7 +317,7 @@ _thread_init(void) _thread_sys_sigaction(SIGINFO, &act, NULL) != 0 || _thread_sys_sigaction(SIGCHLD, &act, NULL) != 0) { /* - * Abort this process if signal initialisation fails: + * Abort this process if signal initialisation fails: */ PANIC("Cannot initialise signal handler"); } @@ -335,7 +339,7 @@ _thread_init(void) if ((_thread_dtablesize = getdtablesize()) < 0) { /* * Cannot get the system defined table size, so abort - * this process. + * this process. */ PANIC("Cannot get dtablesize"); } @@ -346,7 +350,7 @@ _thread_init(void) /* * Cannot allocate memory for the file descriptor - * table, so abort this process. + * table, so abort this process. */ PANIC("Cannot allocate memory for file descriptor table"); } @@ -354,13 +358,13 @@ _thread_init(void) if ((_thread_pfd_table = (struct pollfd *) malloc(sizeof(struct pollfd) * _thread_dtablesize)) == NULL) { /* * Cannot allocate memory for the file descriptor - * table, so abort this process. + * table, so abort this process. */ PANIC("Cannot allocate memory for pollfd table"); } else { /* * Enter a loop to initialise the file descriptor - * table: + * table: */ for (i = 0; i < _thread_dtablesize; i++) { /* Initialise the file descriptor table: */ @@ -374,14 +378,6 @@ _thread_init(void) PANIC("Cannot initialize stdio file " "descriptor table entry"); } - - /* Install the scheduling timer: */ - itimer.it_interval.tv_sec = 0; - itimer.it_interval.tv_usec = _clock_res_usec; - itimer.it_value = itimer.it_interval; - if (setitimer(_ITIMER_SCHED_TIMER, &itimer, NULL) != 0) - PANIC("Cannot set interval timer"); - } } @@ -401,10 +397,10 @@ _thread_init(void) } /* - * Special start up code for NetBSD/Alpha + * Special start up code for NetBSD/Alpha */ #if defined(__NetBSD__) && defined(__alpha__) -int +int main(int argc, char *argv[], char *env); int |