minix/lib/libc/sys-minix/sigreturn.c
Ben Gras 7597f4a8fc <machine/signal.h>
. use netbsd sigframe, sigcontext struct
	. netbsd sigframe *contains* sigcontext; use that directly
	  in kernel sigsend
	. drop two fields from minix x86 stackframe.h (process context)
	  that were unused, retadr and st

use in-sigframe sigcontext

Change-Id: Ib59d699596dc3a78163dee59f19730482fdddf11
2014-03-03 20:47:07 +01:00

36 lines
950 B
C

#include "namespace.h"
#include <sys/cdefs.h>
#include <lib.h>
#include <string.h>
#include <assert.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 */
}