按照《深入理解计算机系统》所说Linux x86-64系统中代码段地址总是从0x400000开始
但为什么我在Ubuntu 20.04中编译出的测试程序代码段地址为0x1040
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
[ 0] NULL 0000000000000000 00000000
0000000000000000 0000000000000000 0 0 0
[ 1] .interp PROGBITS 0000000000000318 00000318
000000000000001c 0000000000000000 A 0 0 1
[ 2] .note.gnu.propert NOTE 0000000000000338 00000338
0000000000000020 0000000000000000 A 0 0 8
[ 3] .note.gnu.build-i NOTE 0000000000000358 00000358
0000000000000024 0000000000000000 A 0 0 4
[ 4] .note.ABI-tag NOTE 000000000000037c 0000037c
0000000000000020 0000000000000000 A 0 0 4
[ 5] .gnu.hash GNU_HASH 00000000000003a0 000003a0
0000000000000024 0000000000000000 A 6 0 8
[ 6] .dynsym DYNSYM 00000000000003c8 000003c8
0000000000000090 0000000000000018 A 7 1 8
[ 7] .dynstr STRTAB 0000000000000458 00000458
000000000000007d 0000000000000000 A 0 0 1
[ 8] .gnu.version VERSYM 00000000000004d6 000004d6
000000000000000c 0000000000000002 A 6 0 2
[ 9] .gnu.version_r VERNEED 00000000000004e8 000004e8
0000000000000020 0000000000000000 A 7 1 8
[10] .rela.dyn RELA 0000000000000508 00000508
00000000000000c0 0000000000000018 A 6 0 8
[11] .init PROGBITS 0000000000001000 00001000
000000000000001b 0000000000000000 AX 0 0 4
[12] .plt PROGBITS 0000000000001020 00001020
0000000000000010 0000000000000010 AX 0 0 16
[13] .plt.got PROGBITS 0000000000001030 00001030
0000000000000010 0000000000000010 AX 0 0 16
[14] .text PROGBITS 0000000000001040 00001040
0000000000000175 0000000000000000 AX 0 0 16