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54 lines
932 B
54 lines
932 B
#
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# arch/x86_64/setjmp.S
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#
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# setjmp/longjmp for the x86-64 architecture
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#
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#
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# The jmp_buf is assumed to contain the following, in order:
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# %rbx
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# %rsp (post-return)
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# %rbp
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# %r12
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# %r13
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# %r14
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# %r15
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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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pop %rsi # Return address, and adjust the stack
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xorl %eax,%eax # Return value
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movq %rbx,(%rdi)
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movq %rsp,8(%rdi) # Post-return %rsp!
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push %rsi # Make the call/return stack happy
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movq %rbp,16(%rdi)
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movq %r12,24(%rdi)
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movq %r13,32(%rdi)
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movq %r14,40(%rdi)
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movq %r15,48(%rdi)
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movq %rsi,56(%rdi) # Return address
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ret
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.size setjmp,.-setjmp
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.text
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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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movl %esi,%eax # Return value (int)
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movq (%rdi),%rbx
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movq 8(%rdi),%rsp
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movq 16(%rdi),%rbp
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movq 24(%rdi),%r12
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movq 32(%rdi),%r13
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movq 40(%rdi),%r14
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movq 48(%rdi),%r15
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jmp *56(%rdi)
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.size longjmp,.-longjmp
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