1 #include "namespace.h" 2 3 #include <sys/cdefs.h> 4 #include <lib.h> 5 6 #include <string.h> 7 #include <assert.h> 8 #include <signal.h> 9 #include <string.h> 10 #include <sys/signal.h> 11 #include <machine/signal.h> 12 13 int sigreturn(struct sigcontext *scp) 14 { 15 sigset_t set; 16 17 /* The message can't be on the stack, because the stack will vanish out 18 * from under us. The send part of ipc_sendrec will succeed, but when 19 * a message is sent to restart the current process, who knows what will 20 * be in the place formerly occupied by the message? 21 */ 22 static message m; 23 24 /* Protect against race conditions by blocking all interrupts. */ 25 sigfillset(&set); /* splhi */ 26 sigprocmask(SIG_SETMASK, &set, NULL); 27 28 memset(&m, 0, sizeof(m)); 29 m.m_lc_pm_sigset.set = scp->sc_mask; 30 m.m_lc_pm_sigset.ctx = (vir_bytes)scp; 31 return(_syscall(PM_PROC_NR, PM_SIGRETURN, &m)); /* normally doesn't return */ 32 } 33