2011-11-9 10:14:49

 

2011-11-9 10:14:49

#if defined(__arm__) || defined(__sparc_v9__)
/* The prologue must be reachable with a direct jump. ARM and Sparc64
 have limited branch ranges (possibly also PPC) so place it in a
 section close to code segment. */
#define code_gen_section                                \
    __attribute__((__section__(".gen_code")))           \
    __attribute__((aligned (32)))
#elif defined(_WIN32)
/* Maximum alignment for Win32 is 16. */
#define code_gen_section                                \
    __attribute__((aligned (16)))
#else
#define code_gen_section                                \
    __attribute__((aligned (32)))
#endif

uint8_t code_gen_prologue[1024] code_gen_section;

这个数据16字节对齐

map_exec(code_gen_prologue, sizeof(code_gen_prologue));
   
把这个数据变成可执行