linux 段错误错误码为14是什么原因呢？

现在错误码是：
segfault at bfbdd69b ip 00000000bfbdd69b sp 00007fff77a5f368 error 14 in zero (deleted)[7f65bfbdd000+7a2000]

这是什么原因造成的呢，看到了错误码的定义但还是不太明白
/*

• Page fault error code bits: *
• bit 0 == 0: no page found 1: protection fault
• bit 1 == 0: read access 1: write access
• bit 2 == 0: kernel-mode access 1: user-mode access
• bit 3 == 1: use of reserved bit detected

• bit 4 == 1: fault was an instruction fetch
  */
  enum x86_pf_error_code {

  PF_PROT = 1 << 0,
  PF_WRITE = 1 << 1,
  PF_USER = 1 << 2,
  PF_RSVD = 1 << 3,
  PF_INSTR = 1 << 4,
  };
  有大佬能细讲一下吗？

执行这个addr2line -e main（你的代码文件名） bfbdd69b
你就找到问题了

Trap 为 0xe，即 14，也就是 Page Fault。

而 arch/x86/mm/fault.c 则详细解释了错误码（Error）：

/*

• Page fault error code bits: *
• bit 0 == 0: no page found 1: protection fault
• bit 1 == 0: read access 1: write access
• bit 2 == 0: kernel-mode access 1: user-mode access
• bit 3 == 1: use of reserved bit detected

• bit 4 == 1: fault was an instruction fetch
  */
  enum x86_pf_error_code {

  PF_PROT         =               1 << 0,
  PF_WRITE        =               1 << 1,
  PF_USER         =               1 << 2,
  PF_RSVD         =               1 << 3,
  PF_INSTR        =               1 << 4,