[mirror_ubuntu-eoan-kernel.git] / arch / x86 / um / setjmp_32.S

/* 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
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
13c06be3 JD	2	#
	3	# arch/i386/setjmp.S
	4	#
	5	# setjmp/longjmp for the i386 architecture
	6	#
	7
	8	#
	9	# The jmp_buf is assumed to contain the following, in order:
	10	# %ebx
	11	# %esp
	12	# %ebp
	13	# %esi
	14	# %edi
	15	# <return address>
	16	#
	17
	18	.text
	19	.align 4
f44f1e7d FF	20	.globl kernel_setjmp
	21	.type kernel_setjmp, @function
	22	kernel_setjmp:
13c06be3 JD	23	#ifdef _REGPARM
	24	movl %eax,%edx
	25	#else
	26	movl 4(%esp),%edx
	27	#endif
	28	popl %ecx # Return address, and adjust the stack
	29	xorl %eax,%eax # Return value
	30	movl %ebx,(%edx)
	31	movl %esp,4(%edx) # Post-return %esp!
	32	pushl %ecx # Make the call/return stack happy
	33	movl %ebp,8(%edx)
	34	movl %esi,12(%edx)
	35	movl %edi,16(%edx)
	36	movl %ecx,20(%edx) # Return address
	37	ret
	38
f44f1e7d	39	.size kernel_setjmp,.-kernel_setjmp
13c06be3 JD	40
	41	.text
	42	.align 4
f44f1e7d FF	43	.globl kernel_longjmp
	44	.type kernel_longjmp, @function
	45	kernel_longjmp:
13c06be3 JD	46	#ifdef _REGPARM
	47	xchgl %eax,%edx
	48	#else
	49	movl 4(%esp),%edx # jmp_ptr address
	50	movl 8(%esp),%eax # Return value
	51	#endif
	52	movl (%edx),%ebx
	53	movl 4(%edx),%esp
	54	movl 8(%edx),%ebp
	55	movl 12(%edx),%esi
	56	movl 16(%edx),%edi
	57	jmp *20(%edx)
	58
f44f1e7d	59	.size kernel_longjmp,.-kernel_longjmp