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-rw-r--r--arch/arm26/lib/csumpartialcopyuser.S114
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diff --git a/arch/arm26/lib/csumpartialcopyuser.S b/arch/arm26/lib/csumpartialcopyuser.S
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-/*
- * linux/arch/arm26/lib/csumpartialcopyuser.S
- *
- * Copyright (C) 1995-1998 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/linkage.h>
-#include <asm/assembler.h>
-#include <asm/errno.h>
-#include <asm/asm-offsets.h>
-
- .text
-
- .macro save_regs
- stmfd sp!, {r1 - r2, r4 - r9, fp, ip, lr, pc}
- mov r9, sp, lsr #13
- mov r9, r9, lsl #13
- ldr r9, [r9, #TSK_ADDR_LIMIT]
- mov r9, r9, lsr #24
- .endm
-
- .macro load_regs,flags
- ldm\flags fp, {r1, r2, r4-r9, fp, sp, pc}^
- .endm
-
- .macro load1b, reg1
- tst r9, #0x01
-9999: ldreqbt \reg1, [r0], #1
- ldrneb \reg1, [r0], #1
- .section __ex_table, "a"
- .align 3
- .long 9999b, 6001f
- .previous
- .endm
-
- .macro load2b, reg1, reg2
- tst r9, #0x01
-9999: ldreqbt \reg1, [r0], #1
- ldrneb \reg1, [r0], #1
-9998: ldreqbt \reg2, [r0], #1
- ldrneb \reg2, [r0], #1
- .section __ex_table, "a"
- .long 9999b, 6001f
- .long 9998b, 6001f
- .previous
- .endm
-
- .macro load1l, reg1
- tst r9, #0x01
-9999: ldreqt \reg1, [r0], #4
- ldrne \reg1, [r0], #4
- .section __ex_table, "a"
- .align 3
- .long 9999b, 6001f
- .previous
- .endm
-
- .macro load2l, reg1, reg2
- tst r9, #0x01
- ldmneia r0!, {\reg1, \reg2}
-9999: ldreqt \reg1, [r0], #4
-9998: ldreqt \reg2, [r0], #4
- .section __ex_table, "a"
- .long 9999b, 6001f
- .long 9998b, 6001f
- .previous
- .endm
-
- .macro load4l, reg1, reg2, reg3, reg4
- tst r9, #0x01
- ldmneia r0!, {\reg1, \reg2, \reg3, \reg4}
-9999: ldreqt \reg1, [r0], #4
-9998: ldreqt \reg2, [r0], #4
-9997: ldreqt \reg3, [r0], #4
-9996: ldreqt \reg4, [r0], #4
- .section __ex_table, "a"
- .long 9999b, 6001f
- .long 9998b, 6001f
- .long 9997b, 6001f
- .long 9996b, 6001f
- .previous
- .endm
-
-/*
- * unsigned int
- * csum_partial_copy_from_user(const char *src, char *dst, int len, int sum, int *err_ptr)
- * r0 = src, r1 = dst, r2 = len, r3 = sum, [sp] = *err_ptr
- * Returns : r0 = checksum, [[sp, #0], #0] = 0 or -EFAULT
- */
-
-#define FN_ENTRY ENTRY(csum_partial_copy_from_user)
-
-#include "csumpartialcopygeneric.S"
-
-/*
- * FIXME: minor buglet here
- * We don't return the checksum for the data present in the buffer. To do
- * so properly, we would have to add in whatever registers were loaded before
- * the fault, which, with the current asm above is not predictable.
- */
- .align 4
-6001: mov r4, #-EFAULT
- ldr r5, [fp, #4] @ *err_ptr
- str r4, [r5]
- ldmia sp, {r1, r2} @ retrieve dst, len
- add r2, r2, r1
- mov r0, #0 @ zero the buffer
-6002: teq r2, r1
- strneb r0, [r1], #1
- bne 6002b
- load_regs ea