mirror of
https://github.com/Tencent/libco.git
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133 lines
2.9 KiB
C++
133 lines
2.9 KiB
C++
/*
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* Tencent is pleased to support the open source community by making Libco
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available.
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* Copyright (C) 2014 THL A29 Limited, a Tencent company. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "coctx.h"
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#include <stdio.h>
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#include <string.h>
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#define ESP 0
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#define EIP 1
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#define EAX 2
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#define ECX 3
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// -----------
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#define RSP 0
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#define RIP 1
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#define RBX 2
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#define RDI 3
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#define RSI 4
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#define RBP 5
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#define R12 6
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#define R13 7
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#define R14 8
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#define R15 9
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#define RDX 10
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#define RCX 11
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#define R8 12
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#define R9 13
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//----- --------
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// 32 bit
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// | regs[0]: ret |
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// | regs[1]: ebx |
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// | regs[2]: ecx |
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// | regs[3]: edx |
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// | regs[4]: edi |
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// | regs[5]: esi |
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// | regs[6]: ebp |
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// | regs[7]: eax | = esp
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enum {
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kEIP = 0,
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kEBP = 6,
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kESP = 7,
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};
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//-------------
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// 64 bit
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// low | regs[0]: r15 |
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// | regs[1]: r14 |
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// | regs[2]: r13 |
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// | regs[3]: r12 |
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// | regs[4]: r9 |
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// | regs[5]: r8 |
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// | regs[6]: rbp |
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// | regs[7]: rdi |
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// | regs[8]: rsi |
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// | regs[9]: ret | //ret func addr
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// | regs[10]: rdx |
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// | regs[11]: rcx |
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// | regs[12]: rbx |
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// hig | regs[13]: rsp |
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enum {
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kRDI = 7,
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kRSI = 8,
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kRETAddr = 9,
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kRSP = 13,
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};
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// 64 bit
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extern "C" {
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extern void coctx_swap(coctx_t*, coctx_t*) asm("coctx_swap");
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};
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#if defined(__i386__)
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int coctx_init(coctx_t* ctx) {
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memset(ctx, 0, sizeof(*ctx));
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return 0;
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}
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int coctx_make(coctx_t* ctx, coctx_pfn_t pfn, const void* s, const void* s1) {
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// make room for coctx_param
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char* sp = ctx->ss_sp + ctx->ss_size - sizeof(coctx_param_t);
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sp = (char*)((unsigned long)sp & -16L);
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coctx_param_t* param = (coctx_param_t*)sp;
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void** ret_addr = (void**)(sp - sizeof(void*) * 2);
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*ret_addr = (void*)pfn;
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param->s1 = s;
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param->s2 = s1;
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memset(ctx->regs, 0, sizeof(ctx->regs));
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ctx->regs[kESP] = (char*)(sp) - sizeof(void*) * 2;
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return 0;
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}
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#elif defined(__x86_64__)
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int coctx_make(coctx_t* ctx, coctx_pfn_t pfn, const void* s, const void* s1) {
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char* sp = ctx->ss_sp + ctx->ss_size - sizeof(void*);
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sp = (char*)((unsigned long)sp & -16LL);
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memset(ctx->regs, 0, sizeof(ctx->regs));
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void** ret_addr = (void**)(sp);
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*ret_addr = (void*)pfn;
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ctx->regs[kRSP] = sp;
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ctx->regs[kRETAddr] = (char*)pfn;
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ctx->regs[kRDI] = (char*)s;
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ctx->regs[kRSI] = (char*)s1;
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return 0;
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}
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int coctx_init(coctx_t* ctx) {
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memset(ctx, 0, sizeof(*ctx));
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return 0;
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}
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#endif
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