minix/lib/libc/sys-minix/sigreturn.c
Ben Gras 8ccb12bb5a use netbsd <sys/signal.h> and sigset_t
. create signals-related struct message type to store sigset_t
	  directly
	. create notify-specific message types, so the generic NOTIFY_ARG
	  doesn't exist anymore
	. various related test expansions, improvements, fixes
	. add a few error-checks to sigismember() calls
	. rename kernel call specific signals fields to SYS_*

Change-Id: I53c18999b5eaf0cfa0cb25f5330bee9e7ad2b478
2014-03-02 12:28:31 +01:00

35 lines
930 B
C

#include "namespace.h"
#include <sys/cdefs.h>
#include <lib.h>
#include <string.h>
#include <signal.h>
#include <string.h>
#include <sys/signal.h>
#include <machine/signal.h>
#ifdef __weak_alias
__weak_alias(sigreturn, _sigreturn)
#endif
int sigreturn(struct sigcontext *scp)
{
sigset_t set;
/* The message can't be on the stack, because the stack will vanish out
* from under us. The send part of ipc_sendrec will succeed, but when
* a message is sent to restart the current process, who knows what will
* be in the place formerly occupied by the message?
*/
static message m;
/* Protect against race conditions by blocking all interrupts. */
sigfillset(&set); /* splhi */
sigprocmask(SIG_SETMASK, &set, (sigset_t *) NULL);
memset(&m, 0, sizeof(m));
m.PM_SIG_SET = scp->sc_mask;
m.PM_SIG_CTX = (char *) scp;
return(_syscall(PM_PROC_NR, PM_SIGRETURN, &m)); /* normally doesn't return */
}