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selftests/powerpc: fix exec benchmark

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The exec_target binary could segfault calling _exit(2) because r13
is not set up properly (and libc looks at that when performing a
syscall). Call SYS_exit using syscall(2) which doesn't seem to
have this problem.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin 2018-05-12 13:35:24 +10:00 committed by Michael Ellerman
parent 7ef73cd39b
commit c906d2c74e
1 changed files with 5 additions and 2 deletions
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7
tools/testing/selftests/powerpc/benchmarks/exec_target.c
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@ -6,8 +6,11 @@
* Copyright 2018, Anton Blanchard, IBM Corp.
*/
void _exit(int);
#define _GNU_SOURCE
#include <unistd.h>
#include <sys/syscall.h>
void _start(void)
{
_exit(0);
syscall(SYS_exit, 0);
}