162 lines
7.0 KiB
C
162 lines
7.0 KiB
C
/*
|
|
libco.amd64 (2009-10-12)
|
|
author: byuu
|
|
license: public domain
|
|
*/
|
|
|
|
#define LIBCO_C
|
|
#include <libco.h>
|
|
#include <assert.h>
|
|
#include <stdlib.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
static thread_local long long co_active_buffer[64];
|
|
static thread_local cothread_t co_active_handle = 0;
|
|
static void (*co_swap)(cothread_t, cothread_t) = 0;
|
|
|
|
#ifdef _WIN32
|
|
//ABI: Win64
|
|
static unsigned char co_swap_function[] = {
|
|
0x48, 0x89, 0x22, /* mov [rdx],rsp */
|
|
0x48, 0x8b, 0x21, /* mov rsp,[rcx] */
|
|
0x58, /* pop rax */
|
|
0x48, 0x89, 0x6a, 0x08, /* mov [rdx+0x8],rbp */
|
|
0x48, 0x89, 0x72, 0x10, /* mov [rdx+0x10],rsi */
|
|
0x48, 0x89, 0x7a, 0x18, /* mov [rdx+0x18],rdi */
|
|
0x48, 0x89, 0x5a, 0x20, /* mov [rdx+0x20],rbx */
|
|
0x4c, 0x89, 0x62, 0x28, /* mov [rdx+0x28],r12 */
|
|
0x4c, 0x89, 0x6a, 0x30, /* mov [rdx+0x30],r13 */
|
|
0x4c, 0x89, 0x72, 0x38, /* mov [rdx+0x38],r14 */
|
|
0x4c, 0x89, 0x7a, 0x40, /* mov [rdx+0x40],r15 */
|
|
0x48, 0x81, 0xc2, 0x80, 0x00, 0x00, 0x00, /* add rdx,0x80 */
|
|
0x48, 0x83, 0xe2, 0xf0, /* and rdx,-0x10 */
|
|
0x0f, 0x29, 0x32, /* movaps [rdx],xmm6 */
|
|
0x0f, 0x29, 0x7a, 0x10, /* movaps [rdx+0x10],xmm7 */
|
|
0x44, 0x0f, 0x29, 0x42, 0x20, /* movaps [rdx+0x20],xmm8 */
|
|
0x44, 0x0f, 0x29, 0x4a, 0x30, /* movaps [rdx+0x30],xmm9 */
|
|
0x44, 0x0f, 0x29, 0x52, 0x40, /* movaps [rdx+0x40],xmm10 */
|
|
0x44, 0x0f, 0x29, 0x5a, 0x50, /* movaps [rdx+0x50],xmm11 */
|
|
0x44, 0x0f, 0x29, 0x62, 0x60, /* movaps [rdx+0x60],xmm12 */
|
|
0x44, 0x0f, 0x29, 0x6a, 0x70, /* movaps [rdx+0x70],xmm13 */
|
|
0x44, 0x0f, 0x29, 0xb2, 0x80, 0x00, 0x00, 0x00, /* movaps [rdx+0x80],xmm14 */
|
|
0x44, 0x0f, 0x29, 0xba, 0x90, 0x00, 0x00, 0x00, /* movaps [rdx+0x90],xmm15 */
|
|
0x48, 0x8b, 0x69, 0x08, /* mov rbp,[rcx+0x8] */
|
|
0x48, 0x8b, 0x71, 0x10, /* mov rsi,[rcx+0x10] */
|
|
0x48, 0x8b, 0x79, 0x18, /* mov rdi,[rcx+0x18] */
|
|
0x48, 0x8b, 0x59, 0x20, /* mov rbx,[rcx+0x20] */
|
|
0x4c, 0x8b, 0x61, 0x28, /* mov r12,[rcx+0x28] */
|
|
0x4c, 0x8b, 0x69, 0x30, /* mov r13,[rcx+0x30] */
|
|
0x4c, 0x8b, 0x71, 0x38, /* mov r14,[rcx+0x38] */
|
|
0x4c, 0x8b, 0x79, 0x40, /* mov r15,[rcx+0x40] */
|
|
0x48, 0x81, 0xc1, 0x80, 0x00, 0x00, 0x00, /* add rcx,0x80 */
|
|
0x48, 0x83, 0xe1, 0xf0, /* and rcx,-0x10 */
|
|
0x0f, 0x29, 0x31, /* movaps [rcx],xmm6 */
|
|
0x0f, 0x29, 0x79, 0x10, /* movaps [rcx+0x10],xmm7 */
|
|
0x44, 0x0f, 0x29, 0x41, 0x20, /* movaps [rcx+0x20],xmm8 */
|
|
0x44, 0x0f, 0x29, 0x49, 0x30, /* movaps [rcx+0x30],xmm9 */
|
|
0x44, 0x0f, 0x29, 0x51, 0x40, /* movaps [rcx+0x40],xmm10 */
|
|
0x44, 0x0f, 0x29, 0x59, 0x50, /* movaps [rcx+0x50],xmm11 */
|
|
0x44, 0x0f, 0x29, 0x61, 0x60, /* movaps [rcx+0x60],xmm12 */
|
|
0x44, 0x0f, 0x29, 0x69, 0x70, /* movaps [rcx+0x70],xmm13 */
|
|
0x44, 0x0f, 0x29, 0xb1, 0x80, 0x00, 0x00, 0x00, /* movaps [rcx+0x80],xmm14 */
|
|
0x44, 0x0f, 0x29, 0xb9, 0x90, 0x00, 0x00, 0x00, /* movaps [rcx+0x90],xmm15 */
|
|
0xff, 0xe0, /* jmp rax */
|
|
};
|
|
|
|
#include <windows.h>
|
|
|
|
void co_init(void)
|
|
{
|
|
DWORD old_privileges;
|
|
VirtualProtect(co_swap_function,
|
|
sizeof(co_swap_function), PAGE_EXECUTE_READWRITE, &old_privileges);
|
|
}
|
|
#else
|
|
//ABI: SystemV
|
|
static unsigned char co_swap_function[] = {
|
|
0x48, 0x89, 0x26, /* mov [rsi],rsp */
|
|
0x48, 0x8b, 0x27, /* mov rsp,[rdi] */
|
|
0x58, /* pop rax */
|
|
0x48, 0x89, 0x6e, 0x08, /* mov [rsi+0x08],rbp */
|
|
0x48, 0x89, 0x5e, 0x10, /* mov [rsi+0x10],rbx */
|
|
0x4c, 0x89, 0x66, 0x18, /* mov [rsi+0x18],r12 */
|
|
0x4c, 0x89, 0x6e, 0x20, /* mov [rsi+0x20],r13 */
|
|
0x4c, 0x89, 0x76, 0x28, /* mov [rsi+0x28],r14 */
|
|
0x4c, 0x89, 0x7e, 0x30, /* mov [rsi+0x30],r15 */
|
|
0x48, 0x8b, 0x6f, 0x08, /* mov rbp,[rdi+0x08] */
|
|
0x48, 0x8b, 0x5f, 0x10, /* mov rbx,[rdi+0x10] */
|
|
0x4c, 0x8b, 0x67, 0x18, /* mov r12,[rdi+0x18] */
|
|
0x4c, 0x8b, 0x6f, 0x20, /* mov r13,[rdi+0x20] */
|
|
0x4c, 0x8b, 0x77, 0x28, /* mov r14,[rdi+0x28] */
|
|
0x4c, 0x8b, 0x7f, 0x30, /* mov r15,[rdi+0x30] */
|
|
0xff, 0xe0, /* jmp rax */
|
|
};
|
|
|
|
#include <unistd.h>
|
|
#include <sys/mman.h>
|
|
|
|
void co_init(void)
|
|
{
|
|
unsigned long long addr = (unsigned long long)co_swap_function;
|
|
unsigned long long base = addr - (addr % sysconf(_SC_PAGESIZE));
|
|
unsigned long long size = (addr - base) + sizeof(co_swap_function);
|
|
mprotect((void*)base, size, PROT_READ | PROT_WRITE | PROT_EXEC);
|
|
}
|
|
#endif
|
|
|
|
static void crash(void)
|
|
{
|
|
assert(0); /* called only if cothread_t entrypoint returns */
|
|
}
|
|
|
|
cothread_t co_active(void)
|
|
{
|
|
if (!co_active_handle)
|
|
co_active_handle = &co_active_buffer;
|
|
return co_active_handle;
|
|
}
|
|
|
|
cothread_t co_create(unsigned int size, void (*entrypoint)(void))
|
|
{
|
|
cothread_t handle;
|
|
|
|
if(!co_swap)
|
|
{
|
|
co_init();
|
|
co_swap = (void (*)(cothread_t, cothread_t))co_swap_function;
|
|
}
|
|
|
|
if (!co_active_handle)
|
|
co_active_handle = &co_active_buffer;
|
|
size += 512; /* allocate additional space for storage */
|
|
size &= ~15; /* align stack to 16-byte boundary */
|
|
|
|
if((handle = (cothread_t)malloc(size)))
|
|
{
|
|
long long *p = (long long*)((char*)handle + size); /* seek to top of stack */
|
|
*--p = (long long)crash; /* crash if entrypoint returns */
|
|
*--p = (long long)entrypoint; /* start of function */
|
|
*(long long*)handle = (long long)p; /* stack pointer */
|
|
}
|
|
|
|
return handle;
|
|
}
|
|
|
|
void co_delete(cothread_t handle)
|
|
{
|
|
free(handle);
|
|
}
|
|
|
|
void co_switch(cothread_t handle)
|
|
{
|
|
register cothread_t co_previous_handle = co_active_handle;
|
|
co_swap(co_active_handle = handle, co_previous_handle);
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|