c++ - 为什么 gcc 不支持裸函数？

Question

我使用裸函数在程序运行时修补部分程序。我可以在 Windows 的 VC++ 中轻松地做到这一点。我正在尝试在 Linux 中执行此操作，但 gcc 似乎不支持裸函数。用裸函数编译代码给我这个:警告:‘naked’属性指令被忽略。在 CentOS 5.5 i386 下编译。

Answer 1

根据 docs，裸属性仅在某些平台(ARM、AVR、MCORE、RX 和 SPU)上受 GCC 支持。 :

naked: Use this attribute on the ARM, AVR, MCORE, RX and SPU ports to indicate that the specified function does not need prologue/epilogue sequences generated by the compiler. It is up to the programmer to provide these sequences. The only statements that can be safely included in naked functions are asm statements that do not have operands. All other statements, including declarations of local variables, if statements, and so forth, should be avoided. Naked functions should be used to implement the body of an assembly function, while allowing the compiler to construct the requisite function declaration for the assembler.

我不知道为什么。