2018-11-20 04:59:10 -05:00
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##
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2018-11-20 05:16:29 -05:00
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## This file is part of the "Coroutine" project and released under the MIT License.
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2018-11-20 04:59:10 -05:00
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##
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## Created by Samuel Williams on 10/5/2018.
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## Copyright, 2018, by Samuel Williams. All rights reserved.
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##
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.text
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# For older linkers
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.globl _coroutine_transfer
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_coroutine_transfer:
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2018-11-20 05:18:16 -05:00
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.globl coroutine_transfer
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coroutine_transfer:
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2018-11-20 04:59:10 -05:00
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# Save caller state
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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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2018-11-20 05:17:00 -05:00
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2018-11-20 04:59:10 -05:00
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# Save caller stack pointer
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movq %rsp, (%rdi)
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2018-11-20 05:17:00 -05:00
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2018-11-20 04:59:10 -05:00
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# Restore callee stack pointer
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movq (%rsi), %rsp
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2018-11-20 05:17:00 -05:00
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2018-11-20 04:59:10 -05:00
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# Restore callee stack
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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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2018-11-20 05:17:00 -05:00
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2018-11-20 04:59:10 -05:00
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# Put the first argument into the return value
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2018-11-20 04:59:23 -05:00
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movq %rdi, %rax
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2018-11-20 05:17:00 -05:00
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2018-11-20 04:59:10 -05:00
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# We pop the return address and jump to it
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ret
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2018-11-24 06:35:34 -05:00
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#if defined(__linux__) && defined(__ELF__)
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.section .note.GNU-stack,"",%progbits
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#endif
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