mirror of
https://github.com/FEX-Emu/linux.git
synced 2025-01-01 14:52:32 +00:00
8c56cc8be5
This patch implements the word-at-a-time interface for ARM using the same algorithm as x86. We use the fls macro from ARMv5 onwards, where we have a clz instruction available which saves us a mov instruction when targetting Thumb-2. For older CPUs, we use the magic 0x0ff0001 constant. Big-endian configurations make use of the implementation from asm-generic. With this implemented, we can replace our byte-at-a-time strnlen_user and strncpy_from_user functions with the optimised generic versions. Reviewed-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
31 lines
1.1 KiB
Makefile
31 lines
1.1 KiB
Makefile
#
|
|
# linux/arch/arm/lib/Makefile
|
|
#
|
|
# Copyright (C) 1995-2000 Russell King
|
|
#
|
|
|
|
lib-y := backtrace.o changebit.o csumipv6.o csumpartial.o \
|
|
csumpartialcopy.o csumpartialcopyuser.o clearbit.o \
|
|
delay.o findbit.o memchr.o memcpy.o \
|
|
memmove.o memset.o memzero.o setbit.o \
|
|
strchr.o strrchr.o \
|
|
testchangebit.o testclearbit.o testsetbit.o \
|
|
ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \
|
|
ucmpdi2.o lib1funcs.o div64.o \
|
|
io-readsb.o io-writesb.o io-readsl.o io-writesl.o \
|
|
call_with_stack.o
|
|
|
|
mmu-y := clear_user.o copy_page.o getuser.o putuser.o
|
|
mmu-y += copy_from_user.o copy_to_user.o
|
|
|
|
# using lib_ here won't override already available weak symbols
|
|
obj-$(CONFIG_UACCESS_WITH_MEMCPY) += uaccess_with_memcpy.o
|
|
|
|
lib-$(CONFIG_MMU) += $(mmu-y)
|
|
lib-y += io-readsw-armv4.o io-writesw-armv4.o
|
|
lib-$(CONFIG_ARCH_RPC) += ecard.o io-acorn.o floppydma.o
|
|
lib-$(CONFIG_ARCH_SHARK) += io-shark.o
|
|
|
|
$(obj)/csumpartialcopy.o: $(obj)/csumpartialcopygeneric.S
|
|
$(obj)/csumpartialcopyuser.o: $(obj)/csumpartialcopygeneric.S
|