enum NaClSignalResult NaClSignalHandleUntrusted(int signal, void *ctx) {
struct NaClSignalContext sigCtx;
char tmp[128];
/*
* Return an 8 bit error code which is -signal to
* simulate normal OS behavior
*/
NaClSignalContextFromHandler(&sigCtx, ctx);
if (NaClSignalContextIsUntrusted(&sigCtx)) {
SNPRINTF(tmp, sizeof(tmp), "\n** Signal %d from untrusted code: Halting "
"at %" NACL_PRIXNACL_REG "h\n", signal, sigCtx.prog_ctr);
NaClSignalErrorMessage(tmp);
NaClExit((-signal) & 0xFF);
}
else {
SNPRINTF(tmp, sizeof(tmp), "\n** Signal %d from trusted code: Continuing "
"from %" NACL_PRIXNACL_REG "h\n", signal, sigCtx.prog_ctr);
NaClSignalErrorMessage(tmp);
}
return NACL_SIGNAL_SEARCH;
}
/*
* A basic handler which will exit with -signal_number when
* a signal is encountered.
*/
static enum NaClSignalResult NaClSignalHandleAll(int signum, void *ctx)
{
struct NaClSignalContext sigCtx;
char msg[SIGNAL_STRLEN];
/* todo(d'b): is it proper solution? */
static int busy = 0;
if(busy) return NACL_SIGNAL_RETURN;
busy = 1;
/*
* Return an 8 bit error code which is -signal to
* simulate normal OS behavior
*/
NaClSignalContextFromHandler(&sigCtx, ctx);
/* set zvm state */
g_snprintf(msg, SIGNAL_STRLEN, "Signal %d from %strusted code: Halting at 0x%012lX",
signum, NaClSignalContextIsUntrusted(&sigCtx) ? "un" : "", sigCtx.prog_ctr);
SetExitState(msg);
NaClExit(EINTR);
return NACL_SIGNAL_RETURN; /* unreachable */
}
void NaClAppThreadGetSuspendedRegistersInternal(
struct NaClAppThread *natp, struct NaClSignalContext *regs) {
NaClSignalContextFromHandler(regs, natp->suspended_registers);
}