| /* 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 */ |
| #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 |
