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/*
* Copyright 2021 IBM Corp.
*
* This work is licensed under the terms of the GNU GPL, version 2 or (at
* your option) any later version. See the COPYING file in the top-level
* directory.
*/
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
static void error1(const char *filename, int line, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fprintf(stderr, "%s:%d: ", filename, line);
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
va_end(ap);
exit(1);
}
static int __chk_error(const char *filename, int line, int ret)
{
if (ret < 0) {
error1(filename, line, "%m (ret=%d, errno=%d/%s)",
ret, errno, strerror(errno));
}
return ret;
}
#define error(fmt, ...) error1(__FILE__, __LINE__, fmt, ## __VA_ARGS__)
#define chk_error(ret) __chk_error(__FILE__, __LINE__, (ret))
int sigfpe_count;
int sigill_count;
static void sig_handler(int sig, siginfo_t *si, void *puc)
{
if (sig == SIGFPE) {
if (si->si_code != 0) {
error("unexpected si_code: 0x%x != 0", si->si_code);
}
++sigfpe_count;
return;
}
if (sig == SIGILL) {
++sigill_count;
return;
}
error("unexpected signal 0x%x\n", sig);
}
int main(int argc, char **argv)
{
sigfpe_count = sigill_count = 0;
struct sigaction act;
/* Set up SIG handler */
act.sa_sigaction = sig_handler;
sigemptyset(&act.sa_mask);
act.sa_flags = SA_SIGINFO;
chk_error(sigaction(SIGFPE, &act, NULL));
chk_error(sigaction(SIGILL, &act, NULL));
uint64_t z = 0x0ull;
uint64_t lz = 0xffffffffffffffffull;
asm volatile (
"lg %%r13,%[lz]\n"
"cgitne %%r13,0\n" /* SIGFPE */
"lg %%r13,%[z]\n"
"cgitne %%r13,0\n" /* no trap */
"nopr\n"
"lg %%r13,%[lz]\n"
"citne %%r13,0\n" /* SIGFPE */
"lg %%r13,%[z]\n"
"citne %%r13,0\n" /* no trap */
"nopr\n"
:
: [z] "m" (z), [lz] "m" (lz)
: "memory", "r13");
if (sigfpe_count != 2) {
error("unexpected SIGFPE count: %d != 2", sigfpe_count);
}
if (sigill_count != 0) {
error("unexpected SIGILL count: %d != 0", sigill_count);
}
printf("PASS\n");
return 0;
}
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