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src/nsexec: fix stack pointer alignment exception

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When test g/317 or g/318 on ARM server, we got a kernel exception:

  kernel: nsexec[8203]: SP Alignment exception: pc=00000000004010a0 sp=00000000005200e8

nsexec gives an unaligned child stack address to clone() system
call sometimes. For making sure it's always aligned, use
"__attribute__((aligned))" extension of GCC (Thanks this suggestion
from Eric sandeen).

Signed-off-by: Zorro Lang <zlang@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
This commit is contained in:
Zorro Lang
2017-09-30 00:49:25 +08:00
committed by Eryu Guan
parent 8443ff29f2
commit 1021cf17bc
1 changed files with 2 additions and 1 deletions
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src/nsexec.c
+2 -1
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@@ -138,7 +138,8 @@ childFunc(void *arg)
#define STACK_SIZE (1024 * 1024)
static char child_stack[STACK_SIZE]; /* Space for child's stack */
/* Space for child's stack */
static char child_stack[STACK_SIZE] __attribute__((aligned));
int
main(int argc, char *argv[])