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ppc: switch to {get,put}_compat_sigset()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2017-09-04 12:17:38 -04:00
parent d74f0f47e2
commit a5ae754a3d
1 changed files with 2 additions and 29 deletions
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31
arch/powerpc/kernel/signal_32.c
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@@ -94,40 +94,13 @@
*/ */
static inline int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set) static inline int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set)
{ {
compat_sigset_t cset; return put_compat_sigset(uset, set, sizeof(*uset));
switch (_NSIG_WORDS) {
case 4: cset.sig[6] = set->sig[3] & 0xffffffffull;
cset.sig[7] = set->sig[3] >> 32;
case 3: cset.sig[4] = set->sig[2] & 0xffffffffull;
cset.sig[5] = set->sig[2] >> 32;
case 2: cset.sig[2] = set->sig[1] & 0xffffffffull;
cset.sig[3] = set->sig[1] >> 32;
case 1: cset.sig[0] = set->sig[0] & 0xffffffffull;
cset.sig[1] = set->sig[0] >> 32;
}
return copy_to_user(uset, &cset, sizeof(*uset));
} }
static inline int get_sigset_t(sigset_t *set, static inline int get_sigset_t(sigset_t *set,
const compat_sigset_t __user *uset) const compat_sigset_t __user *uset)
{ {
compat_sigset_t s32; return get_compat_sigset(set, uset);
if (copy_from_user(&s32, uset, sizeof(*uset)))
return -EFAULT;
/*
* Swap the 2 words of the 64-bit sigset_t (they are stored
* in the "wrong" endian in 32-bit user storage).
*/
switch (_NSIG_WORDS) {
case 4: set->sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
case 3: set->sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
case 2: set->sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
case 1: set->sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
}
return 0;
} }
#define to_user_ptr(p) ptr_to_compat(p) #define to_user_ptr(p) ptr_to_compat(p)