diff options
| author | Nicolas Pitre <nico@cam.org> | 2005-11-01 19:52:22 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2005-11-01 19:52:22 +0000 |
| commit | a0c6fdb987860e6c7f9b8e57439ca2703f462578 (patch) | |
| tree | 4709f4675f3e0fb19016c1245c467408dde36206 /arch/arm/lib/uaccess.S | |
| parent | 85eb226c446a017996859093cbfb5d3ae2c2117a (diff) | |
[ARM] 2946/2: split --arch_clear_user() out of lib/uaccess.S
Patch from Nicolas Pitre
Required for future enhancement patches.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/lib/uaccess.S')
| -rw-r--r-- | arch/arm/lib/uaccess.S | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/arch/arm/lib/uaccess.S b/arch/arm/lib/uaccess.S index d3ed0636c00..c28449157be 100644 --- a/arch/arm/lib/uaccess.S +++ b/arch/arm/lib/uaccess.S @@ -657,41 +657,3 @@ USER( ldrgtbt r3, [r1], #1) @ May fault LOADREGS(fd,sp!, {r4 - r7, pc}) .previous -/* Prototype: int __arch_clear_user(void *addr, size_t sz) - * Purpose : clear some user memory - * Params : addr - user memory address to clear - * : sz - number of bytes to clear - * Returns : number of bytes NOT cleared - */ -ENTRY(__arch_clear_user) - stmfd sp!, {r1, lr} - mov r2, #0 - cmp r1, #4 - blt 2f - ands ip, r0, #3 - beq 1f - cmp ip, #2 -USER( strbt r2, [r0], #1) -USER( strlebt r2, [r0], #1) -USER( strltbt r2, [r0], #1) - rsb ip, ip, #4 - sub r1, r1, ip @ 7 6 5 4 3 2 1 -1: subs r1, r1, #8 @ -1 -2 -3 -4 -5 -6 -7 -USER( strplt r2, [r0], #4) -USER( strplt r2, [r0], #4) - bpl 1b - adds r1, r1, #4 @ 3 2 1 0 -1 -2 -3 -USER( strplt r2, [r0], #4) -2: tst r1, #2 @ 1x 1x 0x 0x 1x 1x 0x -USER( strnebt r2, [r0], #1) -USER( strnebt r2, [r0], #1) - tst r1, #1 @ x1 x0 x1 x0 x1 x0 x1 -USER( strnebt r2, [r0], #1) - mov r0, #0 - LOADREGS(fd,sp!, {r1, pc}) - - .section .fixup,"ax" - .align 0 -9001: LOADREGS(fd,sp!, {r0, pc}) - .previous - |