projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /*- |
| 2 | * BSD LICENSE | |
| 3 | * | |
| 4 | * Copyright(c) 2015 Intel Corporation. All rights reserved. | |
| 5 | * All rights reserved. | |
| 6 | * | |
| 7 | * Redistribution and use in source and binary forms, with or without | |
| 8 | * modification, are permitted provided that the following conditions | |
| 9 | * are met: | |
| 10 | * | |
| 11 | * * Redistributions of source code must retain the above copyright | |
| 12 | * notice, this list of conditions and the following disclaimer. | |
| 13 | * * Redistributions in binary form must reproduce the above copyright | |
| 14 | * notice, this list of conditions and the following disclaimer in | |
| 15 | * the documentation and/or other materials provided with the | |
| 16 | * distribution. | |
| 17 | * * Neither the name of Intel Corporation nor the names of its | |
| 18 | * contributors may be used to endorse or promote products derived | |
| 19 | * from this software without specific prior written permission. | |
| 20 | * | |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 22 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 23 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 24 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 25 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 26 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 27 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 28 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 29 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 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. | |
| 32 | */ | |
| 33 | ||
| 34 | /* | |
| 35 | * https://github.com/halayli/lthread which carries the following license. | |
| 36 | * | |
| 37 | * Copyright (C) 2012, Hasan Alayli <halayli@gmail.com> | |
| 38 | * | |
| 39 | * Redistribution and use in source and binary forms, with or without | |
| 40 | * modification, are permitted provided that the following conditions | |
| 41 | * are met: | |
| 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. | |
| 47 | * | |
| 48 | * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |
| 49 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 50 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 51 | * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE | |
| 52 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 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 | |
| 58 | * SUCH DAMAGE. | |
| 59 | */ | |
| 60 | ||
| 61 | ||
| 62 | ||
| 63 | #if defined(__x86_64__) | |
| 64 | __asm__ ( | |
| 65 | ".text\n" | |
| 66 | ".p2align 4,,15\n" | |
| 67 | ".globl ctx_switch\n" | |
| 68 | ".globl _ctx_switch\n" | |
| 69 | "ctx_switch:\n" | |
| 70 | "_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" | |
| 89 | " ret\n" | |
| 90 | ); | |
| 91 | #else | |
| 92 | #pragma GCC error "__x86_64__ is not defined" | |
| 93 | #endif |