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| author | Sam Ravnborg | 2008-12-03 12:07:00 +0100 |
|---|---|---|
| committer | David S. Miller | 2008-12-04 18:17:18 +0100 |
| commit | 18269c0fd4db9bec2668f895f21d742486ccb90f (patch) | |
| tree | 2aecdac629ea35c77ec246e838dd9cfdeea02121 /arch/sparc/lib/strncpy_from_user_32.S | |
| parent | sparc,sparc64: unify prom/ (diff) | |
| download | kernel-qcow2-linux-18269c0fd4db9bec2668f895f21d742486ccb90f.tar.gz kernel-qcow2-linux-18269c0fd4db9bec2668f895f21d742486ccb90f.tar.xz kernel-qcow2-linux-18269c0fd4db9bec2668f895f21d742486ccb90f.zip | |
sparc: prepare lib/ for unification
Identical named files renamed to <name>_32.S
Refactored Makefile to prepare for unification.
Linking order was altered slightly - but this is a lib.a file so
it should not matter.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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 000000000000..d77198976a66 --- /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 |