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sysvipc: Fix tst-sysvshm-linux on x32

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The Linux shminfo fields are '__syscall_ulong_t' (which is 64-bit
for x32).  This patch fixes the test to compare againt the correct
type and to only clamp the value if '__syscall_ulong_t' is the same
size of 'unsigned long int'.

Checked on x86_64-linux-gnu-x32.
This commit is contained in:
Adhemerval Zanella 2020-10-15 15:45:26 -03:00
parent c02695d776
commit 602da9de69
1 changed files with 5 additions and 4 deletions
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9
sysdeps/unix/sysv/linux/tst-sysvshm-linux.c
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@ -54,9 +54,9 @@ do_prepare (int argc, char *argv[])
struct test_shminfo
{
unsigned long int shmall;
unsigned long int shmmax;
unsigned long int shmmni;
__syscall_ulong_t shmall;
__syscall_ulong_t shmmax;
__syscall_ulong_t shmmni;
};
/* It tries to obtain some system-wide SysV shared memory information from
@ -128,7 +128,8 @@ do_test (void)
#if LONG_MAX == INT_MAX
/* Kernel explicit clamp the value for shmmax on compat symbol (32-bit
binaries running on 64-bit kernels). */
if (v > INT_MAX)
if (sizeof (__syscall_ulong_t) == sizeof (unsigned long int)
&& v > INT_MAX)
v = INT_MAX;
#endif
tipcinfo.shmmax = v;