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| author | Al Viro <viro@zeniv.linux.org.uk> | 2017-05-02 19:52:17 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-07-03 18:44:02 -0400 |
| commit | 468138d78510688fb5476f98d23f11ac6a63229a (patch) | |
| tree | 5f235bc85343bf3f314201a1d281881625d67abe /arch/xtensa/include/asm/flat.h | |
| parent | 2ea659a9ef488125eb46da6eb571de5eae5c43f6 (diff) | |
| download | blackbird-obmc-linux-468138d78510688fb5476f98d23f11ac6a63229a.tar.gz blackbird-obmc-linux-468138d78510688fb5476f98d23f11ac6a63229a.zip | |
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/xtensa/include/asm/flat.h')
| -rw-r--r-- | arch/xtensa/include/asm/flat.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/arch/xtensa/include/asm/flat.h b/arch/xtensa/include/asm/flat.h index 94c44abf15e4..60e0d6a45795 100644 --- a/arch/xtensa/include/asm/flat.h +++ b/arch/xtensa/include/asm/flat.h @@ -1,11 +1,22 @@ #ifndef __ASM_XTENSA_FLAT_H #define __ASM_XTENSA_FLAT_H +#include <asm/unaligned.h> + #define flat_argvp_envp_on_stack() 0 #define flat_old_ram_flag(flags) (flags) #define flat_reloc_valid(reloc, size) ((reloc) <= (size)) -#define flat_get_addr_from_rp(rp, relval, flags, p) get_unaligned(rp) -#define flat_put_addr_at_rp(rp, val, relval ) put_unaligned(val, rp) +static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags, + u32 *addr, u32 *persistent) +{ + *addr = get_unaligned((__force u32 *)rp); + return 0; +} +static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel) +{ + put_unaligned(addr, (__force u32 *)rp); + return 0; +} #define flat_get_relocate_addr(rel) (rel) #define flat_set_persistent(relval, p) 0 |
