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| /*
| * 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
| *
| * SPDX-License-Identifier: GPL-2.0
| */
|
| #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 */
| #endif
| movl (%edx), %ebx
| movl 4(%edx), %esp
| movl 8(%edx), %ebp
| movl 12(%edx), %esi
| movl 16(%edx), %edi
| jmp *20(%edx)
|
| .size longjmp, .-longjmp
|
|
