more nearly correct interface code for signals on linux

SVN=124021

diff --git a/src/runtime/rt1_amd64_linux.c b/src/runtime/rt1_amd64_linux.c
index de6ac7f044039661e968b16a84bc1641755a1d95..6c8b051dd83626604931754a0089e4682b1349bd 100644 (file)
--- a/src/runtime/rt1_amd64_linux.c
+++ b/src/runtime/rt1_amd64_linux.c
@@ -29,8 +29,9 @@ typedef struct  sigaction {
                void    (*sa_handler)(int32);
                void    (*sa_sigaction)(int32, siginfo *, void *);
        } u;                 /* signal handler */
+       uint8 sa_mask[128];                  /* signal mask to apply. 128? are they MORONS? */
        int32     sa_flags;                  /* see signal options below */
-       uint8 sa_mask[2];                    /* signal mask to apply. BUG: 2 is a guess */
+       void (*sa_restorer) (void);     /* unused here; needed to return from trap? */
 } sigaction;
 
 void
@@ -62,12 +63,10 @@ initsig(void)
 {
        int32 i;
        a.u.sa_sigaction = (void*)sigtramp;
-       a.sa_flags = 1|2|4|0x10000000|0x20000000|0x40000000|0x80000000;
-       //a.sa_flags |= SA_SIGINFO;
-       a.sa_flags = ~0;        /* BUG: why is this needed? */
+       a.sa_flags |= 0x04;  /* SA_SIGINFO */
        for(i=0; i<sizeof(a.sa_mask); i++)
                a.sa_mask[i] = 0xFF;
-       //a.sa_mask[1] = (1 << (11-1));
+
        for(i = 0; i <NSIG; i++)
                if(sigtab[i].catch){
                        sys_rt_sigaction(i, &a, (void*)0, 8);