57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
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#include "fault.h"
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#include "sim.h"
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#include <signal.h>
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#include <time.h>
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static struct simulator *sim;
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static void sigsegv_handler(int sig, siginfo_t *info, void *ucontext)
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{
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(void) sig;
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(void) ucontext;
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const char *inner = "";
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switch (info->si_code) {
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case SEGV_MAPERR:
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inner = ": address not mapped to object";
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break;
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case SEGV_ACCERR:
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inner = ": invalid premissions for mapped object";
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break;
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case SEGV_BNDERR:
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inner = ": failed address bound checks";
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break;
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case SEGV_PKUERR:
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inner = ": access was denied by memory protection";
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break;
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}
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sim_dump(sim, "page fault at %p%s", info->si_addr, inner);
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}
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static void sigfpe_handler(int sig, siginfo_t *info, void *ucontext)
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{
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(void) sig;
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(void) info;
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(void) ucontext;
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sim_dump(sim, "floating point exception");
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}
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void init_handlers(struct simulator *s)
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{
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struct sigaction act = {0};
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sim = s;
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/* sigsegv */
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act.sa_sigaction = sigsegv_handler;
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act.sa_flags = SA_SIGINFO;
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sigaction(SIGSEGV, &act, NULL);
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/* sigfpe */
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act.sa_sigaction = sigfpe_handler;
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act.sa_flags = SA_SIGINFO;
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sigaction(SIGFPE, &act, NULL);
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}
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