mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-17 02:08:38 +00:00
fc872ee84c
If longjmp(jmp_buf env, int val) is called with val = 0, the setjmp() macro must return 1. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Simon Glass <sjg@chromium.org>
65 lines
1.2 KiB
ArmAsm
65 lines
1.2 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Written by H. Peter Anvin <hpa@zytor.com>
|
|
* Brought in from Linux v4.4 and modified for U-Boot
|
|
* From Linux arch/um/sys-i386/setjmp.S
|
|
*/
|
|
|
|
#define _REGPARM
|
|
|
|
/*
|
|
* The jmp_buf is assumed to contain the following, in order:
|
|
* %ebx
|
|
* %esp
|
|
* %ebp
|
|
* %esi
|
|
* %edi
|
|
* <return address>
|
|
*/
|
|
|
|
.text
|
|
.align 4
|
|
.globl setjmp
|
|
.type setjmp, @function
|
|
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
|
|
|
|
/* Provide function size if needed */
|
|
.size setjmp, .-setjmp
|
|
|
|
.align 4
|
|
.globl longjmp
|
|
.type longjmp, @function
|
|
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
|
|
test %eax, %eax
|
|
jnz nz
|
|
inc %eax
|
|
nz:
|
|
jmp *20(%edx)
|
|
|
|
.size longjmp, .-longjmp
|