31 lines
563 B
ArmAsm
31 lines
563 B
ArmAsm
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# See System V x86-64 calling convention
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# https://gitlab.com/x86-psABIs/x86-64-ABI
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.global _libcoro_stack_swap
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_libcoro_stack_swap:
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.global libcoro_stack_swap
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libcoro_stack_swap:
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# Store caller registers on the current stack
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pushq %rbp
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pushq %rbx
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pushq %r12
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pushq %r13
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pushq %r14
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pushq %r15
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# Modify stack pointer of current coroutine (rdi, first argument)
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movq %rsp, (%rdi)
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# Load stack pointer from target coroutine (rsi, second argument)
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movq (%rsi), %rsp
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# Restore target registers
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popq %r15
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popq %r14
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popq %r13
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popq %r12
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popq %rbx
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popq %rbp
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# jump
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retq
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