Plan 9 from Bell Labs’s /usr/web/sources/contrib/ericvh/go-plan9/src/pkg/runtime/linux/arm/signal.c

Copyright © 2021 Plan 9 Foundation.
Distributed under the MIT License.
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// 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 dumpregs(void) {}
// void
// dumpregs(Sigcontext *r)
// {
// 	printf("eax     %X\n", r->eax);
// 	printf("ebx     %X\n", r->ebx);
// 	printf("ecx     %X\n", r->ecx);
// 	printf("edx     %X\n", r->edx);
// 	printf("edi     %X\n", r->edi);
// 	printf("esi     %X\n", r->esi);
// 	printf("ebp     %X\n", r->ebp);
// 	printf("esp     %X\n", r->esp);
// 	printf("eip     %X\n", r->eip);
// 	printf("eflags  %X\n", r->eflags);
// 	printf("cs      %X\n", r->cs);
// 	printf("fs      %X\n", r->fs);
// 	printf("gs      %X\n", r->gs);
// }


/*
 * This assembler routine takes the args from registers, puts them on the stack,
 * and calls sighandler().
 */
extern void sigtramp(void);
extern void sigignore(void);	// just returns
extern void sigreturn(void);	// calls sigreturn

void sighandler(void) {}
// void
// sighandler(int32 sig, Siginfo* info, void* context)
// {
// 	Ucontext *uc;
// 	Sigcontext *sc;

// 	if(panicking)	// traceback already printed
// 		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("\n");

// 	if(gotraceback()){
// 		traceback((void*)sc->eip, (void*)sc->esp, m->curg);
// 		tracebackothers(m->curg);
// 		dumpregs(sc);
// 	}

// 	breakpoint();
// 	exit(2);
// }

void
signalstack(byte *p, int32 n)
{
// 	Sigaltstack st;

// 	st.ss_sp = p;
// 	st.ss_size = n;
// 	st.ss_flags = 0;
// 	sigaltstack(&st, nil);
}

void
initsig(void)
{
// 	static Sigaction sa;

// 	int32 i;
// 	sa.sa_flags = SA_ONSTACK | SA_SIGINFO | SA_RESTORER;
// 	sa.sa_mask = 0xFFFFFFFFFFFFFFFFULL;
// 	sa.sa_restorer = (void*)sigreturn;
// 	for(i = 0; i<NSIG; i++) {
// 		if(sigtab[i].flags) {
// 			if(sigtab[i].flags & SigCatch)
// 				*(void**)sa._u = (void*)sigtramp;	// handler
// 			else
// 				*(void**)sa._u = (void*)sigignore;	// handler
// 			if(sigtab[i].flags & SigRestart)
// 				sa.sa_flags |= SA_RESTART;
// 			else
// 				sa.sa_flags &= ~SA_RESTART;
// 			rt_sigaction(i, &sa, nil, 8);
// 		}
// 	}
}

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