c6bfe5c4d7
I've moved the ARM port from ports to the main sysdeps hierarchy. Beyond the README update, the move of the files was simply git mv ports/sysdeps/arm sysdeps/arm git mv ports/sysdeps/unix/arm sysdeps/unix/arm git mv ports/sysdeps/unix/sysv/linux/arm sysdeps/unix/sysv/linux/arm and in addition to the ChangeLog entries here, I put a note at the top of ports/ChangeLog.arm similar to that at the top of ChangeLog.powerpc. There is deliberately no NEWS change, as I think it makes the most sense to put in a general note above all ports having moved if we can achieve that for 2.20. Tested that disassembly of installed shared libraries for arm is the same before and after this patch, except for data (not instructions) in ld.so (there are assertions in sysdeps/arm/dl-machine.h, and the path by which that file is found, and so by which it appears in the assertion message, changes as a result of the move). * sysdeps/arm: Move directory from ports/sysdeps/arm. * sysdeps/unix/arm: Move directory from ports/sysdeps/unix/arm. * sysdeps/unix/sysv/linux/arm: Move directory from ports/sysdeps/unix/sysv/linux/arm. * README: Update listing for arm-*-linux-gnueabi. ports/ChangeLog.arm: * sysdeps/arm: Move directory to ../sysdeps/arm. * sysdeps/unix/arm: Move directory to ../sysdeps.arm. * sysdeps/unix/sysv/linux/arm: Move directory to ../sysdeps/unix/sysv/linux/arm.
77 lines
2.2 KiB
ArmAsm
77 lines
2.2 KiB
ArmAsm
/* Multiple versions of memcpy
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All versions must be listed in ifunc-impl-list.c.
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Copyright (C) 2013-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* Thumb requires excess IT instructions here. */
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#define NO_THUMB
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#include <sysdep.h>
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#include <rtld-global-offsets.h>
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#ifndef NOT_IN_libc
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/* Under __ARM_NEON__, memcpy_neon.S defines the name memcpy. */
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# ifndef __ARM_NEON__
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.text
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ENTRY(memcpy)
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.type memcpy, %gnu_indirect_function
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# ifdef __SOFTFP__
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ldr r1, .Lmemcpy_arm
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tst r0, #HWCAP_ARM_VFP
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ldrne r1, .Lmemcpy_vfp
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# else
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ldr r1, .Lmemcpy_vfp
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# endif
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tst r0, #HWCAP_ARM_NEON
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ldrne r1, .Lmemcpy_neon
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1:
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add r0, r1, pc
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DO_RET(lr)
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# ifdef __SOFTFP__
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.Lmemcpy_arm:
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.long C_SYMBOL_NAME(__memcpy_arm) - 1b - PC_OFS
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# endif
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.Lmemcpy_neon:
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.long C_SYMBOL_NAME(__memcpy_neon) - 1b - PC_OFS
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.Lmemcpy_vfp:
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.long C_SYMBOL_NAME(__memcpy_vfp) - 1b - PC_OFS
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END(memcpy)
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libc_hidden_builtin_def (memcpy)
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#endif /* Not __ARM_NEON__. */
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/* These versions of memcpy are defined not to clobber any VFP or NEON
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registers so they must always call the ARM variant of the memcpy code. */
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strong_alias (__memcpy_arm, __aeabi_memcpy)
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strong_alias (__memcpy_arm, __aeabi_memcpy4)
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strong_alias (__memcpy_arm, __aeabi_memcpy8)
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libc_hidden_def (__memcpy_arm)
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#undef libc_hidden_builtin_def
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#define libc_hidden_builtin_def(name)
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#undef weak_alias
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#define weak_alias(x, y)
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#undef libc_hidden_def
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#define libc_hidden_def(name)
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#define memcpy __memcpy_arm
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#endif
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#include "memcpy_impl.S"
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