diff options
Diffstat (limited to 'src/pkg/runtime/linux/amd64/signal.c')
| -rw-r--r-- | src/pkg/runtime/linux/amd64/signal.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/src/pkg/runtime/linux/amd64/signal.c b/src/pkg/runtime/linux/amd64/signal.c deleted file mode 100644 index ee90271ed..000000000 --- a/src/pkg/runtime/linux/amd64/signal.c +++ /dev/null @@ -1,194 +0,0 @@ -// 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. - -#include "runtime.h" -#include "defs.h" -#include "signals.h" -#include "os.h" - -void -runtime·dumpregs(Sigcontext *r) -{ - runtime·printf("rax %X\n", r->rax); - runtime·printf("rbx %X\n", r->rbx); - runtime·printf("rcx %X\n", r->rcx); - runtime·printf("rdx %X\n", r->rdx); - runtime·printf("rdi %X\n", r->rdi); - runtime·printf("rsi %X\n", r->rsi); - runtime·printf("rbp %X\n", r->rbp); - runtime·printf("rsp %X\n", r->rsp); - runtime·printf("r8 %X\n", r->r8 ); - runtime·printf("r9 %X\n", r->r9 ); - runtime·printf("r10 %X\n", r->r10); - runtime·printf("r11 %X\n", r->r11); - runtime·printf("r12 %X\n", r->r12); - runtime·printf("r13 %X\n", r->r13); - runtime·printf("r14 %X\n", r->r14); - runtime·printf("r15 %X\n", r->r15); - runtime·printf("rip %X\n", r->rip); - runtime·printf("rflags %X\n", r->eflags); - runtime·printf("cs %X\n", (uint64)r->cs); - runtime·printf("fs %X\n", (uint64)r->fs); - runtime·printf("gs %X\n", (uint64)r->gs); -} - -/* - * This assembler routine takes the args from registers, puts them on the stack, - * and calls sighandler(). - */ -extern void runtime·sigtramp(void); -extern void runtime·sigignore(void); // just returns -extern void runtime·sigreturn(void); // calls runtime·sigreturn - -String -runtime·signame(int32 sig) -{ - if(sig < 0 || sig >= NSIG) - return runtime·emptystring; - return runtime·gostringnocopy((byte*)runtime·sigtab[sig].name); -} - -void -runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp) -{ - Ucontext *uc; - Mcontext *mc; - Sigcontext *r; - uintptr *sp; - - uc = context; - mc = &uc->uc_mcontext; - r = (Sigcontext*)mc; // same layout, more conveient names - - if(sig == SIGPROF) { - runtime·sigprof((uint8*)r->rip, (uint8*)r->rsp, nil, gp); - return; - } - - if(gp != nil && (runtime·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)[2]; - gp->sigpc = r->rip; - - // Only push runtime·sigpanic if r->rip != 0. - // If r->rip == 0, probably panicked because of a - // call to a nil func. Not pushing that onto sp will - // make the trace look like a call to runtime·sigpanic instead. - // (Otherwise the trace will end at runtime·sigpanic and we - // won't get to see who faulted.) - if(r->rip != 0) { - sp = (uintptr*)r->rsp; - *--sp = r->rip; - r->rsp = (uintptr)sp; - } - r->rip = (uintptr)runtime·sigpanic; - return; - } - - if(runtime·sigtab[sig].flags & SigQueue) { - if(runtime·sigsend(sig) || (runtime·sigtab[sig].flags & SigIgnore)) - return; - runtime·exit(2); // SIGINT, SIGTERM, etc - } - - 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", r->rip); - runtime·printf("\n"); - - if(runtime·gotraceback()){ - runtime·traceback((void*)r->rip, (void*)r->rsp, 0, gp); - runtime·tracebackothers(gp); - runtime·dumpregs(r); - } - - runtime·exit(2); -} - -void -runtime·signalstack(byte *p, int32 n) -{ - Sigaltstack st; - - st.ss_sp = p; - st.ss_size = n; - st.ss_flags = 0; - runtime·sigaltstack(&st, nil); -} - -static void -sigaction(int32 i, void (*fn)(int32, Siginfo*, void*, G*), bool restart) -{ - Sigaction sa; - - runtime·memclr((byte*)&sa, sizeof sa); - sa.sa_flags = SA_ONSTACK | SA_SIGINFO | SA_RESTORER; - if(restart) - sa.sa_flags |= SA_RESTART; - sa.sa_mask = ~0ULL; - sa.sa_restorer = (void*)runtime·sigreturn; - if(fn == runtime·sighandler) - fn = (void*)runtime·sigtramp; - sa.sa_handler = fn; - runtime·rt_sigaction(i, &sa, nil, 8); -} - -void -runtime·initsig(int32 queue) -{ - int32 i; - void *fn; - - runtime·siginit(); - - for(i = 0; i<NSIG; i++) { - if(runtime·sigtab[i].flags) { - if((runtime·sigtab[i].flags & SigQueue) != queue) - continue; - if(runtime·sigtab[i].flags & (SigCatch | SigQueue)) - fn = runtime·sighandler; - else - fn = runtime·sigignore; - sigaction(i, fn, (runtime·sigtab[i].flags & SigRestart) != 0); - } - } -} - -void -runtime·resetcpuprofiler(int32 hz) -{ - Itimerval it; - - runtime·memclr((byte*)&it, sizeof it); - if(hz == 0) { - runtime·setitimer(ITIMER_PROF, &it, nil); - sigaction(SIGPROF, SIG_IGN, true); - } else { - sigaction(SIGPROF, runtime·sighandler, true); - it.it_interval.tv_sec = 0; - it.it_interval.tv_usec = 1000000 / hz; - it.it_value = it.it_interval; - runtime·setitimer(ITIMER_PROF, &it, nil); - } - m->profilehz = hz; -} - -void -os·sigpipe(void) -{ - sigaction(SIGPIPE, SIG_DFL, false); - runtime·raisesigpipe(); -} |