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authorAl Viro <viro@zeniv.linux.org.uk>2017-05-03 01:52:17 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2017-07-04 00:44:02 +0200
commit468138d78510688fb5476f98d23f11ac6a63229a (patch)
tree5f235bc85343bf3f314201a1d281881625d67abe /arch/h8300
parentLinux 4.12-rc1 (diff)
downloadlinux-468138d78510688fb5476f98d23f11ac6a63229a.tar.xz
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/h8300')
-rw-r--r--arch/h8300/include/asm/flat.h24
1 files changed, 18 insertions, 6 deletions
diff --git a/arch/h8300/include/asm/flat.h b/arch/h8300/include/asm/flat.h
index a4898eccf2bf..18d024251738 100644
--- a/arch/h8300/include/asm/flat.h
+++ b/arch/h8300/include/asm/flat.h
@@ -5,6 +5,8 @@
#ifndef __H8300_FLAT_H__
#define __H8300_FLAT_H__
+#include <asm/unaligned.h>
+
#define flat_argvp_envp_on_stack() 1
#define flat_old_ram_flag(flags) 1
#define flat_reloc_valid(reloc, size) ((reloc) <= (size))
@@ -18,11 +20,21 @@
*/
#define flat_get_relocate_addr(rel) (rel & ~0x00000001)
-#define flat_get_addr_from_rp(rp, relval, flags, persistent) \
- ({(void)persistent; \
- get_unaligned(rp) & (((flags) & FLAT_FLAG_GOTPIC) ? \
- 0xffffffff : 0x00ffffff); })
-#define flat_put_addr_at_rp(rp, addr, rel) \
- put_unaligned(((*(char *)(rp)) << 24) | ((addr) & 0x00ffffff), (rp))
+static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
+ u32 *addr, u32 *persistent)
+{
+ u32 val = get_unaligned((__force u32 *)rp);
+ if (!(flags & FLAT_FLAG_GOTPIC)
+ val &= 0x00ffffff;
+ *addr = val;
+ return 0;
+}
+
+static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel)
+{
+ u32 *p = (__force u32 *)rp;
+ put_unaligned((addr & 0x00ffffff) | (*(char *)p << 24), p);
+ return 0;
+}
#endif /* __H8300_FLAT_H__ */