也许这对cpp开发者来说太简单了我不知道
在这个简单的对象文件中，“3f”和“2d”行的寻址是如何工作的？ 14和0指数从何而来？
2d: e8 e2 ff ff ff callq 14 <_ZL9privatef2v> 3f: e8 bc ff ff ff callq 0 <_ZL8privatefii> 完全拆卸：
Disassembly of section .text: 0000000000000000 <_ZL8privatefii>: 0: 55 push %rbp 1: 48 89 e5 mov %rsp,%rbp 4: 89 7d fc mov %edi,-0x4(%rbp) 7: 89 75 f8 mov %esi,-0x8(%rbp) a: 8b 45 f8 mov -0x8(%rbp),%eax d: 8b 55 fc mov -0x4(%rbp),%edx 10: 01 d0 add %edx,%eax 12: 5d pop %rbp 13: c3 retq 0000000000000014 <_ZL9privatef2v>: 14: 55 push %rbp 15: 48 89 e5 mov %rsp,%rbp 18: b8 86 00 00 00 mov $0x86,%eax 1d: 5d pop %rbp 1e: c3 retq 000000000000001f <_Z3fooii>: 1f: 55 push %rbp 20: 48 89 e5 mov %rsp,%rbp 23: 48 83 ec 18 sub $0x18,%rsp 27: 89 7d ec mov %edi,-0x14(%rbp) 2a: 89 75 e8 mov %esi,-0x18(%rbp) 2d: e8 e2 ff ff ff callq 14 <_ZL9privatef2v> 32: 89 45 fc mov %eax,-0x4(%rbp) 35: 8b 55 e8 mov -0x18(%rbp),%edx 38: 8b 45 fc mov -0x4(%rbp),%eax 3b: 89 d6 mov %edx,%esi 3d: 89 c7 mov %eax,%edi 3f: e8 bc ff ff ff callq 0 <_ZL8privatefii> 44: c9 leaveq 45: c3 retq 0000000000000046 <main>: 46: 55 push %rbp 47: 48 89 e5 mov %rsp,%rbp 4a: 48 83 ec 10 sub $0x10,%rsp 4e: be 0a 00 00 00 mov $0xa,%esi 53: bf 0a 00 00 00 mov $0xa,%edi 58: e8 00 00 00 00 callq 5d <main+0x17> 5d: 89 45 fc mov %eax,-0x4(%rbp) 60: b8 00 00 00 00 mov $0x0,%eax 65: c9 leaveq 66: c3 retq
搬迁表：
RELOCATION RECORDS FOR [.text]: OFFSET TYPE VALUE 0000000000000059 R_X86_64_PC32 _Z3fooii-0x0000000000000004 RELOCATION RECORDS FOR [.eh_frame]: OFFSET TYPE VALUE 0000000000000020 R_X86_64_PC32 .text 0000000000000040 R_X86_64_PC32 .text+0x0000000000000014 0000000000000060 R_X86_64_PC32 .text+0x000000000000001f 0000000000000080 R_X86_64_PC32 .text+0x0000000000000046
在callq N, text指令N似乎是要呼叫的地址，文本看起来是分配给该地址的标签。 所以，0和<_ZL8privatefii>是一样的，14和<_ZL9privatef2v>是一样的。