diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2017-05-03 02:52:17 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-07-04 01:44:02 +0300 |
| commit | 468138d78510688fb5476f98d23f11ac6a63229a (patch) | |
| tree | 5f235bc85343bf3f314201a1d281881625d67abe /arch/microblaze | |
| parent | 2ea659a9ef488125eb46da6eb571de5eae5c43f6 (diff) | |
| download | linux-468138d78510688fb5476f98d23f11ac6a63229a.tar.xz | |
binfmt_flat: flat_{get,put}_addr_from_rp() should be able to fail
on MMU targets EFAULT is possible here. Make both return 0 or error,
passing what used to be the return value of flat_get_addr_from_rp()
by reference.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/microblaze')
| -rw-r--r-- | arch/microblaze/include/asm/flat.h | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/arch/microblaze/include/asm/flat.h b/arch/microblaze/include/asm/flat.h index 6847c1512c7b..f23c3d266bae 100644 --- a/arch/microblaze/include/asm/flat.h +++ b/arch/microblaze/include/asm/flat.h @@ -32,29 +32,27 @@ * reference */ -static inline unsigned long -flat_get_addr_from_rp(unsigned long *rp, unsigned long relval, - unsigned long flags, unsigned long *persistent) +static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags, + u32 *addr, u32 *persistent) { - unsigned long addr; - (void)flags; + u32 *p = (__force u32 *)rp; /* Is it a split 64/32 reference? */ if (relval & 0x80000000) { /* Grab the two halves of the reference */ - unsigned long val_hi, val_lo; + u32 val_hi, val_lo; - val_hi = get_unaligned(rp); - val_lo = get_unaligned(rp+1); + val_hi = get_unaligned(p); + val_lo = get_unaligned(p+1); /* Crack the address out */ - addr = ((val_hi & 0xffff) << 16) + (val_lo & 0xffff); + *addr = ((val_hi & 0xffff) << 16) + (val_lo & 0xffff); } else { /* Get the address straight out */ - addr = get_unaligned(rp); + *addr = get_unaligned(p); } - return addr; + return 0; } /* @@ -63,25 +61,27 @@ flat_get_addr_from_rp(unsigned long *rp, unsigned long relval, */ static inline void -flat_put_addr_at_rp(unsigned long *rp, unsigned long addr, unsigned long relval) +flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 relval) { + u32 *p = (__force u32 *)rp; /* Is this a split 64/32 reloc? */ if (relval & 0x80000000) { /* Get the two "halves" */ - unsigned long val_hi = get_unaligned(rp); - unsigned long val_lo = get_unaligned(rp + 1); + unsigned long val_hi = get_unaligned(p); + unsigned long val_lo = get_unaligned(p + 1); /* insert the address */ val_hi = (val_hi & 0xffff0000) | addr >> 16; val_lo = (val_lo & 0xffff0000) | (addr & 0xffff); /* store the two halves back into memory */ - put_unaligned(val_hi, rp); - put_unaligned(val_lo, rp+1); + put_unaligned(val_hi, p); + put_unaligned(val_lo, p+1); } else { /* Put it straight in, no messing around */ - put_unaligned(addr, rp); + put_unaligned(addr, p); } + return 0; } #define flat_get_relocate_addr(rel) (rel & 0x7fffffff) |