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linux-user: allow NULL tv argument for settimeofday

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The tv argument to the settimeofday syscall is allowed to be NULL, if
the program only wishes to provide the timezone. QEMU previously
returned -EFAULT when tv was NULL. Instead, execute the syscall &
provide NULL to the kernel as the target program expected.

Signed-off-by: Paul Burton <paul@archlinuxmips.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Paul Burton 2014-06-22 11:25:41 +01:00 committed by Riku Voipio
parent ef4467e911
commit b67d80311a
1 changed files with 8 additions and 4 deletions
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10
linux-user/syscall.c
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@ -6401,11 +6401,15 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
break; break;
case TARGET_NR_settimeofday: case TARGET_NR_settimeofday:
{ {
struct timeval tv; struct timeval tv, *ptv = NULL;
struct timezone tz, *ptz = NULL; struct timezone tz, *ptz = NULL;
if (copy_from_user_timeval(&tv, arg1)) if (arg1) {
if (copy_from_user_timeval(&tv, arg1)) {
goto efault; goto efault;
}
ptv = &tv;
}
if (arg2) { if (arg2) {
if (copy_from_user_timezone(&tz, arg2)) { if (copy_from_user_timezone(&tz, arg2)) {
@ -6414,7 +6418,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
ptz = &tz; ptz = &tz;
} }
ret = get_errno(settimeofday(&tv, ptz)); ret = get_errno(settimeofday(ptv, ptz));
} }
break; break;
#if defined(TARGET_NR_select) #if defined(TARGET_NR_select)