forked from mirror/qemu
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
47 lines
968 B
C
47 lines
968 B
C
/* Test PC misalignment exception */
|
|
|
|
#ifdef __thumb__
|
|
#error "This test must be compiled for ARM"
|
|
#endif
|
|
|
|
#include <assert.h>
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
|
|
static void *expected;
|
|
|
|
static void sigbus(int sig, siginfo_t *info, void *vuc)
|
|
{
|
|
assert(info->si_code == BUS_ADRALN);
|
|
assert(info->si_addr == expected);
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
int main()
|
|
{
|
|
void *tmp;
|
|
|
|
struct sigaction sa = {
|
|
.sa_sigaction = sigbus,
|
|
.sa_flags = SA_SIGINFO
|
|
};
|
|
|
|
if (sigaction(SIGBUS, &sa, NULL) < 0) {
|
|
perror("sigaction");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
asm volatile("adr %0, 1f + 2\n\t"
|
|
"str %0, %1\n\t"
|
|
"bx %0\n"
|
|
"1:"
|
|
: "=&r"(tmp), "=m"(expected));
|
|
|
|
/*
|
|
* From v8, it is CONSTRAINED UNPREDICTABLE whether BXWritePC aligns
|
|
* the address or not. If so, we can legitimately fall through.
|
|
*/
|
|
return EXIT_SUCCESS;
|
|
}
|