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check: prctl -- Add PR_SET_MM_AUXV test

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The ability to set PR_SET_MM_AUXV is implemented
in kernel as a separate PR_SET_MM extension, so
we need to test if the kernel patch is applied
on a running system.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Cyrill Gorcunov 2012-04-05 15:43:00 +04:00 • committed by Pavel Emelyanov
parent b264c6e2ed
commit 92b26d8804
1 changed files with 7 additions and 0 deletions
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7
cr-check.c
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@ -77,6 +77,7 @@ static int check_kcmp(void)
static int check_prctl(void)
{
unsigned long user_auxv = 0;
unsigned int *tid_addr;
int ret;
@ -98,6 +99,12 @@ static int check_prctl(void)
return -1;
}
ret = sys_prctl(PR_SET_MM, PR_SET_MM_AUXV, (long)&user_auxv, sizeof(user_auxv), 0);
if (ret) {
pr_msg("prctl: PR_SET_MM_AUXV is not supported\n");
return -1;
}
return 0;
}