diff options
Diffstat (limited to 'examples/performance-thread/common/arch/x86/ctx.c')
| -rw-r--r-- | examples/performance-thread/common/arch/x86/ctx.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/examples/performance-thread/common/arch/x86/ctx.c b/examples/performance-thread/common/arch/x86/ctx.c new file mode 100644 index 00000000..1e8e2717 --- /dev/null +++ b/examples/performance-thread/common/arch/x86/ctx.c @@ -0,0 +1,93 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2015 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * https://github.com/halayli/lthread which carries the following license. + * + * Copyright (C) 2012, Hasan Alayli <halayli@gmail.com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + + + +#if defined(__x86_64__) +__asm__ ( +".text\n" +".p2align 4,,15\n" +".globl ctx_switch\n" +".globl _ctx_switch\n" +"ctx_switch:\n" +"_ctx_switch:\n" +" movq %rsp, 0(%rsi) # save stack_pointer\n" +" movq %rbp, 8(%rsi) # save frame_pointer\n" +" movq (%rsp), %rax # save insn_pointer\n" +" movq %rax, 16(%rsi)\n" +" movq %rbx, 24(%rsi)\n # save rbx,r12-r15\n" +" movq 24(%rdi), %rbx\n" +" movq %r15, 56(%rsi)\n" +" movq %r14, 48(%rsi)\n" +" movq 48(%rdi), %r14\n" +" movq 56(%rdi), %r15\n" +" movq %r13, 40(%rsi)\n" +" movq %r12, 32(%rsi)\n" +" movq 32(%rdi), %r12\n" +" movq 40(%rdi), %r13\n" +" movq 0(%rdi), %rsp # restore stack_pointer\n" +" movq 16(%rdi), %rax # restore insn_pointer\n" +" movq 8(%rdi), %rbp # restore frame_pointer\n" +" movq %rax, (%rsp)\n" +" ret\n" + ); +#else +#pragma GCC error "__x86_64__ is not defined" +#endif |