diff options
Diffstat (limited to 'src/pkg/runtime/signal_arm.c')
| -rw-r--r-- | src/pkg/runtime/signal_arm.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/pkg/runtime/signal_arm.c b/src/pkg/runtime/signal_arm.c new file mode 100644 index 000000000..adf61de6b --- /dev/null +++ b/src/pkg/runtime/signal_arm.c @@ -0,0 +1,124 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build darwin freebsd linux netbsd openbsd + +#include "runtime.h" +#include "defs_GOOS_GOARCH.h" +#include "os_GOOS.h" +#include "signal_GOOS_GOARCH.h" +#include "signals_GOOS.h" + +void +runtime·dumpregs(Siginfo *info, void *ctxt) +{ + USED(info); + USED(ctxt); + + runtime·printf("trap %x\n", SIG_TRAP(info, ctxt)); + runtime·printf("error %x\n", SIG_ERROR(info, ctxt)); + runtime·printf("oldmask %x\n", SIG_OLDMASK(info, ctxt)); + runtime·printf("r0 %x\n", SIG_R0(info, ctxt)); + runtime·printf("r1 %x\n", SIG_R1(info, ctxt)); + runtime·printf("r2 %x\n", SIG_R2(info, ctxt)); + runtime·printf("r3 %x\n", SIG_R3(info, ctxt)); + runtime·printf("r4 %x\n", SIG_R4(info, ctxt)); + runtime·printf("r5 %x\n", SIG_R5(info, ctxt)); + runtime·printf("r6 %x\n", SIG_R6(info, ctxt)); + runtime·printf("r7 %x\n", SIG_R7(info, ctxt)); + runtime·printf("r8 %x\n", SIG_R8(info, ctxt)); + runtime·printf("r9 %x\n", SIG_R9(info, ctxt)); + runtime·printf("r10 %x\n", SIG_R10(info, ctxt)); + runtime·printf("fp %x\n", SIG_FP(info, ctxt)); + runtime·printf("ip %x\n", SIG_IP(info, ctxt)); + runtime·printf("sp %x\n", SIG_SP(info, ctxt)); + runtime·printf("lr %x\n", SIG_LR(info, ctxt)); + runtime·printf("pc %x\n", SIG_PC(info, ctxt)); + runtime·printf("cpsr %x\n", SIG_CPSR(info, ctxt)); + runtime·printf("fault %x\n", SIG_FAULT(info, ctxt)); +} + +void +runtime·sighandler(int32 sig, Siginfo *info, void *ctxt, G *gp) +{ + SigTab *t; + bool crash; + + if(sig == SIGPROF) { + if(gp != m->g0 && gp != m->gsignal) + runtime·sigprof((uint8*)SIG_PC(info, ctxt), (uint8*)SIG_SP(info, ctxt), (uint8*)SIG_LR(info, ctxt), gp); + return; + } + + t = &runtime·sigtab[sig]; + if(SIG_CODE0(info, ctxt) != SI_USER && (t->flags & SigPanic)) { + if(gp == nil || gp == m->g0) + goto Throw; + + // 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 = SIG_CODE0(info, ctxt); + gp->sigcode1 = SIG_FAULT(info, ctxt); + gp->sigpc = SIG_PC(info, ctxt); + + // We arrange lr, and pc to pretend the panicking + // function calls sigpanic directly. + // Always save LR to stack so that panics in leaf + // functions are correctly handled. This smashes + // the stack frame but we're not going back there + // anyway. + SIG_SP(info, ctxt) -= 4; + *(uint32*)SIG_SP(info, ctxt) = SIG_LR(info, ctxt); + // Don't bother saving PC if it's zero, which is + // probably a call to a nil func: the old link register + // is more useful in the stack trace. + if(gp->sigpc != 0) + SIG_LR(info, ctxt) = gp->sigpc; + // In case we are panicking from external C code + SIG_R10(info, ctxt) = (uintptr)gp; + SIG_R9(info, ctxt) = (uintptr)m; + SIG_PC(info, ctxt) = (uintptr)runtime·sigpanic; + return; + } + + if(SIG_CODE0(info, ctxt) == SI_USER || (t->flags & SigNotify)) + if(runtime·sigsend(sig)) + return; + if(t->flags & SigKill) + runtime·exit(2); + if(!(t->flags & SigThrow)) + return; + +Throw: + if(runtime·panicking) // traceback already printed + runtime·exit(2); + runtime·panicking = 1; + + if(sig < 0 || sig >= NSIG) + runtime·printf("Signal %d\n", sig); + else + runtime·printf("%s\n", runtime·sigtab[sig].name); + + runtime·printf("PC=%x\n", SIG_PC(info, ctxt)); + if(m->lockedg != nil && m->ncgo > 0 && gp == m->g0) { + runtime·printf("signal arrived during cgo execution\n"); + gp = m->lockedg; + } + runtime·printf("\n"); + + if(runtime·gotraceback(&crash)){ + runtime·traceback((void*)SIG_PC(info, ctxt), (void*)SIG_SP(info, ctxt), (void*)SIG_LR(info, ctxt), gp); + runtime·tracebackothers(gp); + runtime·printf("\n"); + runtime·dumpregs(info, ctxt); + } + + if(crash) + runtime·crash(); + + runtime·exit(2); +} |