GCC内联汇编错误：垃圾`（％EBP）+4' 后表达

Question

我试图编译内联汇编（用-fasm块）这MSVC工作，但GCC给我表达式后的垃圾`（％ebp）+4'错误...为什么它不接受语法，我该如何解决这个问题？

uint64_t _tmp = 100; 

_asm 
{ 
    //_tmp value may be changed 
    //... 
    cmp dword ptr _tmp, 100 // Ok 
    jnae temp 
    cmp dword ptr _tmp + 4, 50 // It seems GCC doesn't want to accept _tmp + 4 
    jnae temp 
    //... 
    temp: 
}; 

Answer 1

您应将其更改为：

cmp dword ptr [_tmp + 4], 50