linux-stable/arch/x86/um/setjmp_32.S
Peter Zijlstra f94909ceb1 x86: Prepare asm files for straight-line-speculation
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
2021-12-08 12:25:37 +01:00

59 lines
1 KiB
ArmAsm

/* SPDX-License-Identifier: GPL-2.0 */
#
# arch/i386/setjmp.S
#
# setjmp/longjmp for the i386 architecture
#
#
# The jmp_buf is assumed to contain the following, in order:
# %ebx
# %esp
# %ebp
# %esi
# %edi
# <return address>
#
.text
.align 4
.globl kernel_setjmp
.type kernel_setjmp, @function
kernel_setjmp:
#ifdef _REGPARM
movl %eax,%edx
#else
movl 4(%esp),%edx
#endif
popl %ecx # Return address, and adjust the stack
xorl %eax,%eax # Return value
movl %ebx,(%edx)
movl %esp,4(%edx) # Post-return %esp!
pushl %ecx # Make the call/return stack happy
movl %ebp,8(%edx)
movl %esi,12(%edx)
movl %edi,16(%edx)
movl %ecx,20(%edx) # Return address
RET
.size kernel_setjmp,.-kernel_setjmp
.text
.align 4
.globl kernel_longjmp
.type kernel_longjmp, @function
kernel_longjmp:
#ifdef _REGPARM
xchgl %eax,%edx
#else
movl 4(%esp),%edx # jmp_ptr address
movl 8(%esp),%eax # Return value
#endif
movl (%edx),%ebx
movl 4(%edx),%esp
movl 8(%edx),%ebp
movl 12(%edx),%esi
movl 16(%edx),%edi
jmp *20(%edx)
.size kernel_longjmp,.-kernel_longjmp