diff options
Diffstat (limited to 'arch/avr32/lib/copy_user.S')
| -rw-r--r-- | arch/avr32/lib/copy_user.S | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/arch/avr32/lib/copy_user.S b/arch/avr32/lib/copy_user.S deleted file mode 100644 index 075373471da1..000000000000 --- a/arch/avr32/lib/copy_user.S +++ /dev/null @@ -1,119 +0,0 @@ -/* - * Copy to/from userspace with optional address space checking. - * - * Copyright 2004-2006 Atmel Corporation - * - * 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 <asm/page.h> -#include <asm/thread_info.h> -#include <asm/asm.h> - - /* - * __kernel_size_t - * __copy_user(void *to, const void *from, __kernel_size_t n) - * - * Returns the number of bytes not copied. Might be off by - * max 3 bytes if we get a fault in the main loop. - * - * The address-space checking functions simply fall through to - * the non-checking version. - */ - .text - .align 1 - .global ___copy_from_user - .type ___copy_from_user, @function -___copy_from_user: - branch_if_kernel r8, __copy_user - ret_if_privileged r8, r11, r10, r10 - rjmp __copy_user - .size ___copy_from_user, . - ___copy_from_user - - .global copy_to_user - .type copy_to_user, @function -copy_to_user: - branch_if_kernel r8, __copy_user - ret_if_privileged r8, r12, r10, r10 - .size copy_to_user, . - copy_to_user - - .global __copy_user - .type __copy_user, @function -__copy_user: - mov r9, r11 - andl r9, 3, COH - brne 6f - - /* At this point, from is word-aligned */ -1: sub r10, 4 - brlt 3f - -2: -10: ld.w r8, r11++ -11: st.w r12++, r8 - sub r10, 4 - brge 2b - -3: sub r10, -4 - reteq 0 - - /* - * Handle unaligned count. Need to be careful with r10 here so - * that we return the correct value even if we get a fault - */ -4: -20: ld.ub r8, r11++ -21: st.b r12++, r8 - sub r10, 1 - reteq 0 -22: ld.ub r8, r11++ -23: st.b r12++, r8 - sub r10, 1 - reteq 0 -24: ld.ub r8, r11++ -25: st.b r12++, r8 - retal 0 - - /* Handle unaligned from-pointer */ -6: cp.w r10, 4 - brlt 4b - rsub r9, r9, 4 - -30: ld.ub r8, r11++ -31: st.b r12++, r8 - sub r10, 1 - sub r9, 1 - breq 1b -32: ld.ub r8, r11++ -33: st.b r12++, r8 - sub r10, 1 - sub r9, 1 - breq 1b -34: ld.ub r8, r11++ -35: st.b r12++, r8 - sub r10, 1 - rjmp 1b - .size __copy_user, . - __copy_user - - .section .fixup,"ax" - .align 1 -19: sub r10, -4 -29: retal r10 - - .section __ex_table,"a" - .align 2 - .long 10b, 19b - .long 11b, 19b - .long 20b, 29b - .long 21b, 29b - .long 22b, 29b - .long 23b, 29b - .long 24b, 29b - .long 25b, 29b - .long 30b, 29b - .long 31b, 29b - .long 32b, 29b - .long 33b, 29b - .long 34b, 29b - .long 35b, 29b |