4 * Copyright(c) 2015 Intel Corporation. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
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14 * notice, this list of conditions and the following disclaimer in
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18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 * https://github.com/halayli/lthread which carries the following license.
37 * Copyright (C) 2012, Hasan Alayli <halayli@gmail.com>
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
42 * 1. Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * 2. Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in the
46 * documentation and/or other materials provided with the distribution.
48 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63 #if defined(__x86_64__)
68 ".globl _ctx_switch\n"
71 " movq %rsp, 0(%rsi) # save stack_pointer\n"
72 " movq %rbp, 8(%rsi) # save frame_pointer\n"
73 " movq (%rsp), %rax # save insn_pointer\n"
74 " movq %rax, 16(%rsi)\n"
75 " movq %rbx, 24(%rsi)\n # save rbx,r12-r15\n"
76 " movq 24(%rdi), %rbx\n"
77 " movq %r15, 56(%rsi)\n"
78 " movq %r14, 48(%rsi)\n"
79 " movq 48(%rdi), %r14\n"
80 " movq 56(%rdi), %r15\n"
81 " movq %r13, 40(%rsi)\n"
82 " movq %r12, 32(%rsi)\n"
83 " movq 32(%rdi), %r12\n"
84 " movq 40(%rdi), %r13\n"
85 " movq 0(%rdi), %rsp # restore stack_pointer\n"
86 " movq 16(%rdi), %rax # restore insn_pointer\n"
87 " movq 8(%rdi), %rbp # restore frame_pointer\n"
88 " movq %rax, (%rsp)\n"
92 #pragma GCC error "__x86_64__ is not defined"