gcc -static -g -O2 -static -o init init-init.o
file init
# init: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, with debug_info, not stripped
ldd init
# ldd (0x7fd49e2ed000)
objdump -p初始化
init: file format elf64-x86-64
Program Header:
LOAD off 0x0000000000000000 vaddr 0x0000000000000000 paddr 0x0000000000000000 align 2**21
filesz 0x00000000000076e4 memsz 0x00000000000076e4 flags r-x
LOAD off 0x0000000000007e30 vaddr 0x0000000000207e30 paddr 0x0000000000207e30 align 2**21
filesz 0x00000000000002d8 memsz 0x0000000000001488 flags rw-
DYNAMIC off 0x0000000000007e60 vaddr 0x0000000000207e60 paddr 0x0000000000207e60 align 2**3
filesz 0x0000000000000150 memsz 0x0000000000000150 flags rw-
STACK off 0x0000000000000000 vaddr 0x0000000000000000 paddr 0x0000000000000000 align 2**4
filesz 0x0000000000000000 memsz 0x0000000000000000 flags rw-
RELRO off 0x0000000000007e30 vaddr 0x0000000000207e30 paddr 0x0000000000207e30 align 2**0
filesz 0x00000000000001d0 memsz 0x00000000000001d0 flags r--
Dynamic Section:
SYMBOLIC 0x0000000000000000
INIT 0x00000000000002c0
FINI 0x0000000000006473
GNU_HASH 0x0000000000000158
STRTAB 0x00000000000001b0
SYMTAB 0x0000000000000180
STRSZ 0x0000000000000007
SYMENT 0x0000000000000018
DEBUG 0x0000000000000000
PLTGOT 0x0000000000207fb0
RELA 0x00000000000001b8
RELASZ 0x0000000000000108
RELAENT 0x0000000000000018
BIND_NOW 0x0000000000000000
FLAGS_1 0x0000000008000001
RELACOUNT 0x000000000000000b
readelf初始化-h
ELF Header:
Magic: 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00
Class: ELF64
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: UNIX - System V
ABI Version: 0
Type: DYN (Shared object file)
Machine: Advanced Micro Devices X86-64
Version: 0x1
Entry point address: 0x1158
Start of program headers: 64 (bytes into file)
Start of section headers: 308248 (bytes into file)
Flags: 0x0
为什么是
Type: DYN (Shared object file)？试图在 Alpine 下编译supermin，但是src/Makefile.am#L159
require
init是通过file命令静态链接的。 最佳答案
ET_DYN用于位置无关的可执行文件(PIE)，无论它们是否是静态链接的。动态部分中缺少程序解释器和DT_NEEDED条目，表明该程序确实是静态链接的。您可以使用readelf -l(无.interp)和readelf -d(无NEEDED)进行检查。
在strace下运行程序还将验证程序启动时未加载任何共享对象。
关于c++ - 为什么文件命令报告动态链接到gcc -static，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/46882179/