forked from Minki/linux
f94909ceb1
Replace all ret/retq instructions with RET in preparation of making RET a macro. Since AS is case insensitive it's a big no-op without RET defined. find arch/x86/ -name \*.S | while read file do sed -i 's/\<ret[q]*\>/RET/' $file done Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lore.kernel.org/r/20211204134907.905503893@infradead.org
47 lines
751 B
ArmAsm
47 lines
751 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
|
|
#include <linux/linkage.h>
|
|
#include <asm/export.h>
|
|
|
|
.text
|
|
|
|
/*
|
|
* Inputs:
|
|
* %esi : memory location to compare
|
|
* %eax : low 32 bits of old value
|
|
* %edx : high 32 bits of old value
|
|
* %ebx : low 32 bits of new value
|
|
* %ecx : high 32 bits of new value
|
|
*/
|
|
SYM_FUNC_START(cmpxchg8b_emu)
|
|
|
|
#
|
|
# Emulate 'cmpxchg8b (%esi)' on UP except we don't
|
|
# set the whole ZF thing (caller will just compare
|
|
# eax:edx with the expected value)
|
|
#
|
|
pushfl
|
|
cli
|
|
|
|
cmpl (%esi), %eax
|
|
jne .Lnot_same
|
|
cmpl 4(%esi), %edx
|
|
jne .Lhalf_same
|
|
|
|
movl %ebx, (%esi)
|
|
movl %ecx, 4(%esi)
|
|
|
|
popfl
|
|
RET
|
|
|
|
.Lnot_same:
|
|
movl (%esi), %eax
|
|
.Lhalf_same:
|
|
movl 4(%esi), %edx
|
|
|
|
popfl
|
|
RET
|
|
|
|
SYM_FUNC_END(cmpxchg8b_emu)
|
|
EXPORT_SYMBOL(cmpxchg8b_emu)
|