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https://github.com/golang/go
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runtime: add runtime support for openbsd 386
Add openbsd 386 runtime support, partially based on the existing freebsd 386 runtime. This requires change 4973043. R=golang-dev, rsc CC=golang-dev https://golang.org/cl/4951043
This commit is contained in:
Joel Sing
Russ Cox
parent
c20a338c2f
commit
9ef17990c2
6
src/pkg/runtime/openbsd/386/rt0.s
Normal file
6
src/pkg/runtime/openbsd/386/rt0.s
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@ -0,0 +1,6 @@
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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TEXT _rt0_386_openbsd(SB),7,$0
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JMP _rt0_386(SB)
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189
src/pkg/runtime/openbsd/386/signal.c
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189
src/pkg/runtime/openbsd/386/signal.c
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@ -0,0 +1,189 @@
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "runtime.h"
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#include "defs.h"
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#include "signals.h"
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#include "os.h"
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extern void runtime·sigtramp(void);
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typedef struct sigaction {
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union {
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void (*__sa_handler)(int32);
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void (*__sa_sigaction)(int32, Siginfo*, void *);
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} __sigaction_u; /* signal handler */
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uint32 sa_mask; /* signal mask to apply */
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int32 sa_flags; /* see signal options below */
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} Sigaction;
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void
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runtime·dumpregs(Sigcontext *r)
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{
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runtime·printf("eax %x\n", r->sc_eax);
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runtime·printf("ebx %x\n", r->sc_ebx);
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runtime·printf("ecx %x\n", r->sc_ecx);
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runtime·printf("edx %x\n", r->sc_edx);
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runtime·printf("edi %x\n", r->sc_edi);
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runtime·printf("esi %x\n", r->sc_esi);
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runtime·printf("ebp %x\n", r->sc_ebp);
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runtime·printf("esp %x\n", r->sc_esp);
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runtime·printf("eip %x\n", r->sc_eip);
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runtime·printf("eflags %x\n", r->sc_eflags);
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runtime·printf("cs %x\n", r->sc_cs);
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runtime·printf("fs %x\n", r->sc_fs);
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runtime·printf("gs %x\n", r->sc_gs);
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}
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String
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runtime·signame(int32 sig)
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{
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if(sig < 0 || sig >= NSIG)
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return runtime·emptystring;
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return runtime·gostringnocopy((byte*)runtime·sigtab[sig].name);
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}
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void
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runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp)
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{
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Sigcontext *r = context;
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uintptr *sp;
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if(sig == SIGPROF) {
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runtime·sigprof((uint8*)r->sc_eip, (uint8*)r->sc_esp, nil, gp);
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return;
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}
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if(gp != nil && (runtime·sigtab[sig].flags & SigPanic)) {
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// Make it look like a call to the signal func.
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// Have to pass arguments out of band since
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// augmenting the stack frame would break
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// the unwinding code.
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gp->sig = sig;
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gp->sigcode0 = info->si_code;
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gp->sigcode1 = *(uintptr*)((byte*)info + 12); /* si_addr */
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gp->sigpc = r->sc_eip;
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// Only push runtime·sigpanic if r->sc_eip != 0.
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// If r->sc_eip == 0, probably panicked because of a
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// call to a nil func. Not pushing that onto sp will
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// make the trace look like a call to runtime·sigpanic instead.
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// (Otherwise the trace will end at runtime·sigpanic and we
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// won't get to see who faulted.)
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if(r->sc_eip != 0) {
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sp = (uintptr*)r->sc_esp;
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*--sp = r->sc_eip;
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r->sc_esp = (uintptr)sp;
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}
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r->sc_eip = (uintptr)runtime·sigpanic;
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return;
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}
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if(runtime·sigtab[sig].flags & SigQueue) {
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if(runtime·sigsend(sig) || (runtime·sigtab[sig].flags & SigIgnore))
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return;
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runtime·exit(2); // SIGINT, SIGTERM, etc
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}
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if(runtime·panicking) // traceback already printed
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runtime·exit(2);
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runtime·panicking = 1;
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if(sig < 0 || sig >= NSIG)
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runtime·printf("Signal %d\n", sig);
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else
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runtime·printf("%s\n", runtime·sigtab[sig].name);
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runtime·printf("PC=%X\n", r->sc_eip);
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runtime·printf("\n");
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if(runtime·gotraceback()){
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runtime·traceback((void*)r->sc_eip, (void*)r->sc_esp, 0, gp);
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runtime·tracebackothers(gp);
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runtime·dumpregs(r);
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}
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runtime·exit(2);
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}
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// Called from kernel on signal stack, so no stack split.
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#pragma textflag 7
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void
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runtime·sigignore(void)
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{
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}
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void
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runtime·signalstack(byte *p, int32 n)
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{
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Sigaltstack st;
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st.ss_sp = (int8*)p;
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st.ss_size = n;
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st.ss_flags = 0;
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runtime·sigaltstack(&st, nil);
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}
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static void
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sigaction(int32 i, void (*fn)(int32, Siginfo*, void*, G*), bool restart)
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{
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Sigaction sa;
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runtime·memclr((byte*)&sa, sizeof sa);
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sa.sa_flags = SA_SIGINFO|SA_ONSTACK;
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if(restart)
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sa.sa_flags |= SA_RESTART;
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sa.sa_mask = ~0ULL;
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if (fn == runtime·sighandler)
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fn = (void*)runtime·sigtramp;
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sa.__sigaction_u.__sa_sigaction = (void*)fn;
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runtime·sigaction(i, &sa, nil);
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}
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void
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runtime·initsig(int32 queue)
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{
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int32 i;
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void *fn;
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runtime·siginit();
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for(i = 0; i<NSIG; i++) {
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if(runtime·sigtab[i].flags) {
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if((runtime·sigtab[i].flags & SigQueue) != queue)
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continue;
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if(runtime·sigtab[i].flags & (SigCatch | SigQueue))
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fn = runtime·sighandler;
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else
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fn = runtime·sigignore;
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sigaction(i, fn, (runtime·sigtab[i].flags & SigRestart) != 0);
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}
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}
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}
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void
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runtime·resetcpuprofiler(int32 hz)
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{
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Itimerval it;
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runtime·memclr((byte*)&it, sizeof it);
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if(hz == 0) {
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runtime·setitimer(ITIMER_PROF, &it, nil);
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sigaction(SIGPROF, SIG_IGN, true);
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} else {
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sigaction(SIGPROF, runtime·sighandler, true);
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it.it_interval.tv_sec = 0;
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it.it_interval.tv_usec = 1000000 / hz;
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it.it_value = it.it_interval;
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runtime·setitimer(ITIMER_PROF, &it, nil);
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}
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m->profilehz = hz;
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}
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void
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os·sigpipe(void)
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{
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sigaction(SIGPIPE, SIG_DFL, false);
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runtime·raisesigpipe();
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}
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254
src/pkg/runtime/openbsd/386/sys.s
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254
src/pkg/runtime/openbsd/386/sys.s
Normal file
@ -0,0 +1,254 @@
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//
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// System calls and other sys.stuff for 386, OpenBSD
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// /usr/src/sys/kern/syscalls.master for syscall numbers.
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//
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#include "386/asm.h"
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// Exit the entire program (like C exit)
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TEXT runtime·exit(SB),7,$-4
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MOVL $1, AX
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INT $0x80
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CALL runtime·notok(SB)
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RET
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TEXT runtime·exit1(SB),7,$-4
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MOVL $302, AX // sys_threxit
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INT $0x80
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JAE 2(PC)
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CALL runtime·notok(SB)
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RET
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TEXT runtime·write(SB),7,$-4
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MOVL $4, AX // sys_write
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INT $0x80
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RET
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TEXT runtime·raisesigpipe(SB),7,$12
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MOVL $299, AX // sys_getthrid
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INT $80
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MOVL $0, 0(SP)
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MOVL AX, 4(SP) // arg 1 - pid
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MOVL $13, 8(SP) // arg 2 - signum == SIGPIPE
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MOVL $37, AX // sys_kill
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INT $0x80
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RET
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TEXT runtime·notok(SB),7,$0
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MOVL $0xf1, 0xf1
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RET
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TEXT runtime·mmap(SB),7,$36
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LEAL arg0+0(FP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL // arg 1 - addr
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MOVSL // arg 2 - len
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MOVSL // arg 3 - prot
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MOVSL // arg 4 - flags
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MOVSL // arg 5 - fd
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MOVL $0, AX
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STOSL // arg 6 - pad
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MOVSL // arg 7 - offset
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MOVL $0, AX // top 64 bits of file offset
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STOSL
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MOVL $197, AX // sys_mmap
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INT $0x80
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JCC 2(PC)
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NEGL AX
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RET
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TEXT runtime·munmap(SB),7,$-4
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MOVL $73, AX // sys_munmap
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INT $0x80
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JAE 2(PC)
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CALL runtime·notok(SB)
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RET
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TEXT runtime·setitimer(SB),7,$-4
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MOVL $83, AX
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INT $0x80
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RET
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TEXT runtime·gettime(SB),7,$32
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MOVL $116, AX
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LEAL 12(SP), BX
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MOVL BX, 4(SP)
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MOVL $0, 8(SP)
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INT $0x80
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MOVL 12(SP), BX // sec
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MOVL sec+0(FP), DI
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MOVL BX, (DI)
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MOVL $0, 4(DI) // zero extend 32 -> 64 bits
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MOVL 16(SP), BX // usec
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MOVL usec+4(FP), DI
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MOVL BX, (DI)
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RET
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TEXT runtime·sigaction(SB),7,$-4
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MOVL $46, AX // sys_sigaction
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INT $0x80
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JAE 2(PC)
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CALL runtime·notok(SB)
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RET
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TEXT runtime·sigtramp(SB),7,$44
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get_tls(CX)
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// save g
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MOVL g(CX), DI
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MOVL DI, 20(SP)
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// g = m->gsignal
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MOVL m(CX), BX
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MOVL m_gsignal(BX), BX
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MOVL BX, g(CX)
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// copy arguments for call to sighandler
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MOVL signo+0(FP), BX
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MOVL BX, 0(SP)
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MOVL info+4(FP), BX
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MOVL BX, 4(SP)
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MOVL context+8(FP), BX
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MOVL BX, 8(SP)
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MOVL DI, 12(SP)
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CALL runtime·sighandler(SB)
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// restore g
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get_tls(CX)
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MOVL 20(SP), BX
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MOVL BX, g(CX)
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// call sigreturn
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MOVL context+8(FP), AX
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MOVL $0, 0(SP) // syscall gap
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MOVL AX, 4(SP) // arg 1 - sigcontext
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MOVL $103, AX // sys_sigreturn
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INT $0x80
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CALL runtime·notok(SB)
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RET
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// int32 rfork_thread(int32 flags, void *stack, M *m, G *g, void (*fn)(void));
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TEXT runtime·rfork_thread(SB),7,$8
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MOVL flags+8(SP), AX
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MOVL stack+12(SP), CX
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// Copy m, g, fn off parent stack for use by child.
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SUBL $16, CX
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MOVL mm+16(SP), SI
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MOVL SI, 0(CX)
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MOVL gg+20(SP), SI
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MOVL SI, 4(CX)
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MOVL fn+24(SP), SI
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MOVL SI, 8(CX)
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MOVL $1234, 12(CX)
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MOVL CX, SI
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MOVL $0, 0(SP) // syscall gap
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MOVL AX, 4(SP) // arg 1 - flags
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MOVL $251, AX // sys_rfork
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INT $0x80
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// Return if rfork syscall failed
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JCC 4(PC)
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NEGL AX
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MOVL AX, 48(SP)
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RET
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// In parent, return.
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CMPL AX, $0
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JEQ 3(PC)
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MOVL AX, 48(SP)
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RET
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// In child, on new stack.
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MOVL SI, SP
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// Paranoia: check that SP is as we expect.
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MOVL 12(SP), BP
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CMPL BP, $1234
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JEQ 2(PC)
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INT $3
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// Reload registers
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MOVL 0(SP), BX // m
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MOVL 4(SP), DX // g
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MOVL 8(SP), SI // fn
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// Initialize m->procid to thread ID
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MOVL $299, AX // sys_getthrid
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INT $0x80
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MOVL AX, m_procid(BX)
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// Set FS to point at m->tls
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LEAL m_tls(BX), BP
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PUSHAL // save registers
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PUSHL BP
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CALL runtime·settls(SB)
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POPL AX
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POPAL
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// Now segment is established. Initialize m, g.
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get_tls(AX)
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MOVL DX, g(AX)
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MOVL BX, m(AX)
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CALL runtime·stackcheck(SB) // smashes AX, CX
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MOVL 0(DX), DX // paranoia; check they are not nil
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MOVL 0(BX), BX
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// more paranoia; check that stack splitting code works
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PUSHAL
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CALL runtime·emptyfunc(SB)
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POPAL
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// Call fn
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CALL SI
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CALL runtime·exit1(SB)
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MOVL $0x1234, 0x1005
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RET
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TEXT runtime·sigaltstack(SB),7,$-8
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MOVL $288, AX // sys_sigaltstack
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MOVL new+4(SP), BX
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MOVL old+8(SP), CX
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INT $0x80
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CMPL AX, $0xfffff001
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JLS 2(PC)
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INT $3
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RET
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TEXT runtime·setldt(SB),7,$8
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// Under OpenBSD we set the GS base instead of messing with the LDT.
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MOVL 16(SP), AX // tls0
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MOVL AX, 0(SP)
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CALL runtime·settls(SB)
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RET
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TEXT runtime·settls(SB),7,$16
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// adjust for ELF: wants to use -8(GS) and -4(GS) for g and m
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MOVL 20(SP), CX
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ADDL $8, CX
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MOVL CX, 0(CX)
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MOVL $0, 0(SP) // syscall gap
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MOVL $9, 4(SP) // I386_SET_GSBASE (machine/sysarch.h)
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MOVL CX, 8(SP) // pointer to base
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MOVL $165, AX // sys_sysarch
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INT $0x80
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JCC 2(PC)
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CALL runtime·notok(SB)
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RET
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TEXT runtime·osyield(SB),7,$-4
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MOVL $298, AX // sys_sched_yield
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INT $0x80
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RET
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GLOBL runtime·tlsoffset(SB),$4
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@ -14,7 +14,6 @@
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#include <sys/time.h>
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#include <sys/unistd.h>
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#include <sys/signal.h>
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#include <machine/mcontext.h>
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#include <errno.h>
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#include <signal.h>
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@ -97,7 +96,8 @@ typedef stack_t $StackT;
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typedef struct timeval $Timeval;
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typedef struct itimerval $Itimerval;
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// This is a hack to avoid pulling in machine/fpu.h and struct fxsave64.
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// This is a hack to avoid pulling in machine/fpu.h.
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typedef void $sfxsave64;
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typedef void $usavefpu;
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typedef struct sigcontext $Sigcontext;
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@ -3,6 +3,11 @@
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#include "os.h"
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#include "malloc.h"
|
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|
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enum
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{
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ENOMEM = 12,
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};
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void*
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runtime·SysAlloc(uintptr n)
|
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{
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@ -33,20 +38,21 @@ runtime·SysFree(void *v, uintptr n)
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void*
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runtime·SysReserve(void *v, uintptr n)
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{
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void *p;
|
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|
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// On 64-bit, people with ulimit -v set complain if we reserve too
|
||||
// much address space. Instead, assume that the reservation is okay
|
||||
// and check the assumption in SysMap.
|
||||
if(sizeof(void*) == 8)
|
||||
return v;
|
||||
|
||||
return runtime·mmap(v, n, PROT_NONE, MAP_ANON|MAP_PRIVATE, -1, 0);
|
||||
p = runtime·mmap(v, n, PROT_NONE, MAP_ANON|MAP_PRIVATE, -1, 0);
|
||||
if (p == ((void *)-ENOMEM))
|
||||
return nil;
|
||||
else
|
||||
return p;
|
||||
}
|
||||
|
||||
enum
|
||||
{
|
||||
ENOMEM = 12,
|
||||
};
|
||||
|
||||
void
|
||||
runtime·SysMap(void *v, uintptr n)
|
||||
{
|
||||
|
||||
Loading…
Reference in New Issue
Block a user