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| author | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
|---|---|---|
| committer | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
| commit | 97327692361306d1e6259021bc425e32832fdb50 (patch) | |
| tree | fe9088f3248ec61e24f404f21b9793cb644b7f01 /arch/sparc/lib/strncpy_from_user_32.S | |
| parent | 2d05a8f663478a44e088d122e0d62109bbc801d0 (diff) | |
| parent | a3a8b90b61e21be3dde9101c4e86c881e0f06210 (diff) | |
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dirty fix to merging
Diffstat (limited to 'arch/sparc/lib/strncpy_from_user_32.S')
| -rw-r--r-- | arch/sparc/lib/strncpy_from_user_32.S | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/sparc/lib/strncpy_from_user_32.S b/arch/sparc/lib/strncpy_from_user_32.S new file mode 100644 index 00000000..d7719897 --- /dev/null +++ b/arch/sparc/lib/strncpy_from_user_32.S @@ -0,0 +1,47 @@ +/* strncpy_from_user.S: Sparc strncpy from userspace. + * + * Copyright(C) 1996 David S. Miller + */ + +#include <asm/ptrace.h> +#include <asm/errno.h> + + .text + .align 4 + + /* Must return: + * + * -EFAULT for an exception + * count if we hit the buffer limit + * bytes copied if we hit a null byte + */ + + .globl __strncpy_from_user +__strncpy_from_user: + /* %o0=dest, %o1=src, %o2=count */ + mov %o2, %o3 +1: + subcc %o2, 1, %o2 + bneg 2f + nop +10: + ldub [%o1], %o4 + add %o0, 1, %o0 + cmp %o4, 0 + add %o1, 1, %o1 + bne 1b + stb %o4, [%o0 - 1] +2: + add %o2, 1, %o0 + retl + sub %o3, %o0, %o0 + + .section .fixup,#alloc,#execinstr + .align 4 +4: + retl + mov -EFAULT, %o0 + + .section __ex_table,#alloc + .align 4 + .word 10b, 4b |