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-rw-r--r--examples/performance-thread/common/arch/x86/ctx.c93
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
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+++ b/examples/performance-thread/common/arch/x86/ctx.c
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+/*-
+ * 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