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| /* SPDX-License-Identifier: GPL-2.0 */
| #
| # arch/i386/setjmp.S
| #
| # setjmp/longjmp for the i386 architecture
| #
|
| #
| # The jmp_buf is assumed to contain the following, in order:
| # %ebx
| # %esp
| # %ebp
| # %esi
| # %edi
| # <return address>
| #
|
| .text
| .align 4
| .globl kernel_setjmp
| .type kernel_setjmp, @function
| kernel_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
|
| .size kernel_setjmp,.-kernel_setjmp
|
| .text
| .align 4
| .globl kernel_longjmp
| .type kernel_longjmp, @function
| kernel_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
| jmp *20(%edx)
|
| .size kernel_longjmp,.-kernel_longjmp
|
|
