61 lines
1.1 KiB
ArmAsm
61 lines
1.1 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Written by H. Peter Anvin <hpa@zytor.com>
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* Brought in from Linux v4.4 and modified for U-Boot
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* From Linux arch/um/sys-i386/setjmp.S
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*/
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#define _REGPARM
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/*
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* The jmp_buf is assumed to contain the following, in order:
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* %ebx
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* %esp
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* %ebp
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* %esi
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* %edi
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* <return address>
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*/
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.text
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.align 4
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.globl setjmp
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.type setjmp, @function
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setjmp:
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#ifdef _REGPARM
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movl %eax, %edx
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#else
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movl 4(%esp), %edx
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#endif
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popl %ecx /* Return address, and adjust the stack */
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xorl %eax, %eax /* Return value */
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movl %ebx, (%edx)
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movl %esp, 4(%edx) /* Post-return %esp! */
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pushl %ecx /* Make the call/return stack happy */
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movl %ebp, 8(%edx)
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movl %esi, 12(%edx)
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movl %edi, 16(%edx)
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movl %ecx, 20(%edx) /* Return address */
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ret
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/* Provide function size if needed */
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.size setjmp, .-setjmp
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.align 4
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.globl longjmp
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.type longjmp, @function
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longjmp:
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#ifdef _REGPARM
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xchgl %eax, %edx
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#else
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movl 4(%esp), %edx /* jmp_ptr address */
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#endif
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movl (%edx), %ebx
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movl 4(%edx), %esp
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movl 8(%edx), %ebp
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movl 12(%edx), %esi
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movl 16(%edx), %edi
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jmp *20(%edx)
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.size longjmp, .-longjmp
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