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| /* SPDX-License-Identifier: GPL-2.0 */
| #
| # arch/x86_64/setjmp.S
| #
| # setjmp/longjmp for the x86-64 architecture
| #
|
| #
| # The jmp_buf is assumed to contain the following, in order:
| # %rbx
| # %rsp (post-return)
| # %rbp
| # %r12
| # %r13
| # %r14
| # %r15
| # <return address>
| #
|
| .text
| .align 4
| .globl kernel_setjmp
| .type kernel_setjmp, @function
| kernel_setjmp:
| pop %rsi # Return address, and adjust the stack
| xorl %eax,%eax # Return value
| movq %rbx,(%rdi)
| movq %rsp,8(%rdi) # Post-return %rsp!
| push %rsi # Make the call/return stack happy
| movq %rbp,16(%rdi)
| movq %r12,24(%rdi)
| movq %r13,32(%rdi)
| movq %r14,40(%rdi)
| movq %r15,48(%rdi)
| movq %rsi,56(%rdi) # Return address
| RET
|
| .size kernel_setjmp,.-kernel_setjmp
|
| .text
| .align 4
| .globl kernel_longjmp
| .type kernel_longjmp, @function
| kernel_longjmp:
| movl %esi,%eax # Return value (int)
| movq (%rdi),%rbx
| movq 8(%rdi),%rsp
| movq 16(%rdi),%rbp
| movq 24(%rdi),%r12
| movq 32(%rdi),%r13
| movq 40(%rdi),%r14
| movq 48(%rdi),%r15
| jmp *56(%rdi)
|
| .size kernel_longjmp,.-kernel_longjmp
|
|
