1/* SPDX-License-Identifier: GPL-2.0 */
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
20	.globl kernel_setjmp
21	.type kernel_setjmp, @function
22kernel_setjmp:
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
39	.size kernel_setjmp,.-kernel_setjmp
40
41	.text
42	.align 4
43	.globl kernel_longjmp
44	.type kernel_longjmp, @function
45kernel_longjmp:
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
59	.size kernel_longjmp,.-kernel_longjmp
60