diff options
Diffstat (limited to 'src/pkg/runtime/linux/386/signal.c')
-rw-r--r-- | src/pkg/runtime/linux/386/signal.c | 33 |
1 files changed, 25 insertions, 8 deletions
diff --git a/src/pkg/runtime/linux/386/signal.c b/src/pkg/runtime/linux/386/signal.c index 87e6779b5..fed052f63 100644 --- a/src/pkg/runtime/linux/386/signal.c +++ b/src/pkg/runtime/linux/386/signal.c @@ -45,7 +45,28 @@ void sighandler(int32 sig, Siginfo* info, void* context) { Ucontext *uc; - Sigcontext *sc; + Sigcontext *r; + uintptr *sp; + G *gp; + + uc = context; + r = &uc->uc_mcontext; + + if((gp = m->curg) != nil && (sigtab[sig].flags & SigPanic)) { + // Make it look like a call to the signal func. + // Have to pass arguments out of band since + // augmenting the stack frame would break + // the unwinding code. + gp->sig = sig; + gp->sigcode0 = info->si_code; + gp->sigcode1 = ((uintptr*)info)[3]; + + sp = (uintptr*)r->esp; + *--sp = r->eip; + r->eip = (uintptr)sigpanic; + r->esp = (uintptr)sp; + return; + } if(sigtab[sig].flags & SigQueue) { if(sigsend(sig) || (sigtab[sig].flags & SigIgnore)) @@ -57,22 +78,18 @@ sighandler(int32 sig, Siginfo* info, void* context) exit(2); panicking = 1; - uc = context; - sc = &uc->uc_mcontext; - if(sig < 0 || sig >= NSIG) printf("Signal %d\n", sig); else printf("%s\n", sigtab[sig].name); - printf("Faulting address: %p\n", *(void**)info->_sifields); - printf("PC=%X\n", sc->eip); + printf("PC=%X\n", r->eip); printf("\n"); if(gotraceback()){ - traceback((void*)sc->eip, (void*)sc->esp, 0, m->curg); + traceback((void*)r->eip, (void*)r->esp, 0, m->curg); tracebackothers(m->curg); - dumpregs(sc); + dumpregs(r); } breakpoint(); |