https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108337
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
int main(int argc, char *argv[])
{
int i = 0;
char msg[65] = "Hello World 0!\n";
auto result = write(1, msg, sizeof(msg) - 1);
i = 0;
uintptr_t t;
asm("mov %%rsp, %0":"=r"(t));
while (i < 64) {
uintptr_t tt = (t >> i) & 0xf;
msg[(64-i-1)] = (tt > 9) ? (tt - 10 + 'a') : (tt + '0');
i++;
}
result = write(1, msg, sizeof(msg) - 1);
exit(result >= 0 ? 0 : 1);
}
Gives:
00000000000000000137fffffffffffeda5b6db6da5a49248124925b7eda5a48
For -static -nostartfiles -nostdlib -Wl,-emain without gives:
00000000000000000137ffffffffffedb6c92480001248137ec8125b6da5a480
You need -mstackrealign to correct for the not aligned stack pointer that the
kernel gives.
