struct reg 和 struct user_regs_struc 之间的区别？

Question

Linux 64 位机器上的 struct reg 和 struct user_regs_struc 有什么区别？

Answer 1

struct user_regs_struct
{
  unsigned long r15;
  unsigned long r14;
  unsigned long r13;
  unsigned long r12;
  unsigned long rbp;
  unsigned long rbx;
  unsigned long r11;
  unsigned long r10;
  unsigned long r9;
  unsigned long r8;
  unsigned long rax;
  unsigned long rcx;
  unsigned long rdx;
  unsigned long rsi;
  unsigned long rdi;
  unsigned long orig_rax;
  unsigned long rip;
  unsigned long cs;
  unsigned long eflags;
  unsigned long rsp;
  unsigned long ss;
  unsigned long fs_base;
  unsigned long gs_base;
  unsigned long ds;
  unsigned long es;
  unsigned long fs;
  unsigned long gs;
};

该结构可以在 /usr/include/x86_64-linux-gnu/sys 中找到，

根据 此链接 struct reg 位于

 struct reg {
            register_t fixreg[32];
            register_t lr;
            register_t cr;
            register_t xer;
            register_t ctr;
            register_t pc;
    };

freeBsd 文件中：sys/powerpc/include/reg.h

是的，我在我的 debian 64 位系统中没有找到此结构。