【原创】objdump 的使用
2024-05-30 05:46:10
2019独角兽企业重金招聘Python工程师标准>>> 
objdump 是用来查看目标文件或者可执行的目标文件的构成的 GCC 工具。
objdump - display information from object files.
objdump -x obj 以某种分类信息的形式把目标文件的数据组织（被分为几大块）输出。
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-x
--all-headers
Display all available header information, including the symbol table and relocation entries. Using -x is equivalent to specifying all of -a -f -h -p -r -t.
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objdump -t obj 输出目标文件的符号表。
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-t
--syms
Print the symbol table entries of the file. This is similar to the information provided by the nm program.
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比 nm -s 包含的符号表信息更全面。
objdump -h obj 输出目标文件的所有段概括。
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-h
--section-headers
--headers
Display summary information from the section headers of the object file.
File segments may be relocated to nonstandard addresses, for example by using the -Ttext, -Tdata, or -Tbss options to ld. However, some object file formats, such as a.out, do not store the starting address of the file segments. In those situations, although ld relocates the sections correctly, using objdump -h to list the file section headers cannot show the correct addresses. Instead, it shows the usual addresses, which are implicit for the target.
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objdump -j .text/.data -S obj 输出指定段的信息。
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-j name
--section=name
Display information only for section name.
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-S
--source
Display source code intermixed with disassembly, if possible. Implies -d.
--source
-S 尽可能反汇编出源代码，尤其当编译的时候指定了 -g 这种调试参数时效果比较明显。
隐含了 -d 参数。
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-d
--disassemble
Display the assembler mnemonics for the machine instructions from objfile. This option only disassembles
those sections which are expected to contain instructions.
--disassemble
-d 仅反汇编应该包含指令机器码的 section 。
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-D
--disassemble-all
Like -d, but disassemble the contents of all sections, not just those expected to contain instructions.
--disassemble-all
-D 与 -d 类似，但反汇编所有 section 。
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objdump -a obj 输出 .a 文件中 .o 文件的信息 。
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-a
--archive-header
If any of the objfile files are archives, display the archive header information (in a format similar to ls
-l). Besides the information you could list with ar tv, objdump -a shows the object file format of each archive member.
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比 ar tv 只多了文件格式信息（也是查看静态库文件中包含的二进制文件为 32bit 或 64bit 的方法）。
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-l
--line-numbers
Label the display (using debugging information) with the filename and source line numbers corresponding to the object code or relocs shown. Only useful with -d, -D, or -r.
--line-numbers
-l 用文件名和行号标注相应的目标代码，仅仅和 -d、-D 或者 -r 一起使用。使用 -ld 和使用 -d 的区别不是很大，在源码级调试的 时候有用，要求编译时使用了 -g 之类的调试编译选项。
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--prefix-addresses
When disassembling, print the complete address on each line. This is the older disassembly format.
--prefix-addresses
反汇编的时候，显示每一行的完整地址。这是一种比较老的反汇编格式。
显示效果并不理想，但可能会用到其中的某些显示，自己可以对比。
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--show-raw-insn
When disassembling instructions, print the instruction in hex as well as in symbolic form. This is the default except when --prefix-addresses is used.
--show-raw-insn
反汇编的时候，显示每条汇编指令对应的十六进制机器码，这是缺省选项，除非指定了 --prefix-addresses 。
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--no-show-raw-insn
When disassembling instructions, do not print the instruction bytes. This is the default when --pre- fix-addresses is used.
--no-show-raw-insn
反汇编时，不显示汇编指令的十六进制机器码，这是指定 --prefix-addresses 选项时的缺省设置。
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示例一：以 libevent.a 进行演示。
[root@Betty lib]# pwd
/usr/local/lib
[root@Betty lib]# ll libevent.a
-rw-r--r-- 1 root root 635122 Jul 8 13:53 libevent.a查看 libevent.a 中包含哪些 .o 文件（权限+格式）。
[root@Betty lib]# objdump -a libevent.a
In archive libevent.a:event.o: file format elf64-x86-64
rwxrwSrwx 0/0 58760 Jul 8 13:52 2013 event.obuffer.o: file format elf64-x86-64
rwxrwSrwx 0/0 24168 Jul 8 13:52 2013 buffer.oevbuffer.o: file format elf64-x86-64
rwxrwSrwx 0/0 28656 Jul 8 13:52 2013 evbuffer.olog.o: file format elf64-x86-64
rwxrwSrwx 0/0 14392 Jul 8 13:52 2013 log.oevutil.o: file format elf64-x86-64
rwxrwSrwx 0/0 11920 Jul 8 13:52 2013 evutil.oevent_tagging.o: file format elf64-x86-64
rwxrwSrwx 0/0 30368 Jul 8 13:52 2013 event_tagging.ohttp.o: file format elf64-x86-64
rwxrwSrwx 0/0 169040 Jul 8 13:52 2013 http.oevdns.o: file format elf64-x86-64
rwxrwSrwx 0/0 150064 Jul 8 13:52 2013 evdns.oevrpc.o: file format elf64-x86-64
rwxrwSrwx 0/0 44912 Jul 8 13:52 2013 evrpc.ostrlcpy.o: file format elf64-x86-64
rwxrwSrwx 0/0 4216 Jul 8 13:52 2013 strlcpy.oselect.o: file format elf64-x86-64
rwxrwSrwx 0/0 22056 Jul 8 13:52 2013 select.opoll.o: file format elf64-x86-64
rwxrwSrwx 0/0 21832 Jul 8 13:52 2013 poll.oepoll.o: file format elf64-x86-64
rwxrwSrwx 0/0 23560 Jul 8 13:52 2013 epoll.osignal.o: file format elf64-x86-64
rwxrwSrwx 0/0 25888 Jul 8 13:52 2013 signal.o[root@Betty lib]#作为对比，提供 ar 命令输出结果。
ar - create, modify, and extract from archives
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t Display a table listing the contents of archive, or those of the files listed in member... that are present
in the archive. Normally only the member name is shown; if you also want to see the modes (permissions), timestamp, owner, group, and size, you can request that by also specifying the v modifier.
If you do not specify a member, all files in the archive are listed.
If there is more than one file with the same name (say, fie) in an archive (say b.a), ar t b.a fie lists
only the first instance; to see them all, you must ask for a complete listing---in our example, ar t b.a.
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[root@Betty lib]# ar tv libevent.a
rwxrwSrwx 0/0 58760 Jul 8 13:52 2013 event.o
rwxrwSrwx 0/0 24168 Jul 8 13:52 2013 buffer.o
rwxrwSrwx 0/0 28656 Jul 8 13:52 2013 evbuffer.o
rwxrwSrwx 0/0 14392 Jul 8 13:52 2013 log.o
rwxrwSrwx 0/0 11920 Jul 8 13:52 2013 evutil.o
rwxrwSrwx 0/0 30368 Jul 8 13:52 2013 event_tagging.o
rwxrwSrwx 0/0 169040 Jul 8 13:52 2013 http.o
rwxrwSrwx 0/0 150064 Jul 8 13:52 2013 evdns.o
rwxrwSrwx 0/0 44912 Jul 8 13:52 2013 evrpc.o
rwxrwSrwx 0/0 4216 Jul 8 13:52 2013 strlcpy.o
rwxrwSrwx 0/0 22056 Jul 8 13:52 2013 select.o
rwxrwSrwx 0/0 21832 Jul 8 13:52 2013 poll.o
rwxrwSrwx 0/0 23560 Jul 8 13:52 2013 epoll.o
rwxrwSrwx 0/0 25888 Jul 8 13:52 2013 signal.o
[root@Betty lib]#输出 .a 中全部 .o 文件中的符号表信息。
[root@Betty lib]# objdump -t libevent.a
In archive libevent.a:event.o: file format elf64-x86-64SYMBOL TABLE:
0000000000000000 l df *ABS* 0000000000000000 event.c
0000000000000000 l d .text 0000000000000000 .text
0000000000000000 l d .data 0000000000000000 .data
0000000000000000 l d .bss 0000000000000000 .bss
0000000000000000 l d .debug_abbrev 0000000000000000 .debug_abbrev
0000000000000000 l d .debug_info 0000000000000000 .debug_info
0000000000000000 l d .debug_line 0000000000000000 .debug_line
0000000000000000 l F .text 0000000000000008 event_loopexit_cb
0000000000000000 l d .rodata.str1.1 0000000000000000 .rodata.str1.1
0000000000000070 l O .rodata 0000000000000016 __PRETTY_FUNCTION__.5067
0000000000000140 l F .text 000000000000008b gettime
0000000000000008 l O .bss 0000000000000004 use_monotonic
00000000000002d0 l F .text 000000000000001d event_once_cb
0000000000000090 l O .rodata 0000000000000019 __func__.4992
0000000000000000 l d .rodata.str1.8 0000000000000000 .rodata.str1.8
00000000000000e0 l O .rodata 0000000000000020 eventops
0000000000000100 l O .rodata 000000000000000f __func__.4892
0000000000000590 l F .text 0000000000000357 event_queue_remove
0000000000000020 l O .rodata 0000000000000013 __func__.5403
0000000000000013 l O .rodata 000000000000000a __PRETTY_FUNCTION__.5306
00000000000000c0 l O .rodata 0000000000000010 __PRETTY_FUNCTION__.4915
00000000000000a9 l O .rodata 000000000000000d __func__.4961
0000000000000d30 l F .text 0000000000000213 event_queue_insert
0000000000000000 l O .rodata 0000000000000013 __func__.5437
000000000000003d l O .rodata 000000000000000d __PRETTY_FUNCTION__.5336
0000000000000050 l O .rodata 0000000000000015 __PRETTY_FUNCTION__.5026
0000000000000033 l O .rodata 000000000000000a __PRETTY_FUNCTION__.5266
0000000000000000 l d .rodata 0000000000000000 .rodata
0000000000000000 l d .debug_frame 0000000000000000 .debug_frame
0000000000000000 l d .eh_frame 0000000000000000 .eh_frame
0000000000000000 l d .debug_loc 0000000000000000 .debug_loc
0000000000000000 l d .debug_pubnames 0000000000000000 .debug_pubnames
0000000000000000 l d .debug_aranges 0000000000000000 .debug_aranges
0000000000000000 l d .debug_ranges 0000000000000000 .debug_ranges
0000000000000000 l d .debug_str 0000000000000000 .debug_str
0000000000000000 l d .note.GNU-stack 0000000000000000 .note.GNU-stack
0000000000000000 l d .comment 0000000000000000 .comment
0000000000000010 g F .text 0000000000000015 event_base_loopbreak
0000000000000030 g F .text 000000000000000c event_loopbreak
0000000000000000 g O .bss 0000000000000008 current_base
0000000000000040 g F .text 000000000000005a event_set
00000000000000a0 g F .text 0000000000000026 event_base_set
00000000000000d0 g F .text 000000000000001f event_priority_set
00000000000000f0 g F .text 0000000000000006 event_get_version
0000000000000100 g F .text 000000000000000e event_get_method
0000000000000110 g F .text 000000000000002d event_base_get_method
0000000000000000 *UND* 0000000000000000 __assert_fail
0000000000000000 *UND* 0000000000000000 gettimeofday
0000000000000000 *UND* 0000000000000000 clock_gettime
00000000000001d0 g F .text 00000000000000f5 event_pending
0000000000000000 *UND* 0000000000000000 free
00000000000002f0 g F .text 0000000000000112 event_base_priority_init
0000000000000000 *UND* 0000000000000000 calloc
0000000000000000 *UND* 0000000000000000 malloc
0000000000000000 *UND* 0000000000000000 event_err
0000000000000410 g F .text 000000000000000e event_priority_init
0000000000000420 g F .text 0000000000000145 event_base_new
0000000000000000 *UND* 0000000000000000 epollops
0000000000000000 *UND* 0000000000000000 evutil_getenv
0000000000000000 *UND* 0000000000000000 event_msgx
0000000000000000 *UND* 0000000000000000 event_errx
0000000000000570 g F .text 000000000000001a event_init
00000000000008f0 g F .text 0000000000000106 event_del
0000000000000a00 g F .text 0000000000000222 event_base_free
0000000000000c30 g F .text 00000000000000f9 event_reinit
0000000000000000 *UND* 0000000000000000 realloc
0000000000000f50 g F .text 0000000000000030 event_active
0000000000000f80 g F .text 000000000000048e event_base_loop
0000000000000000 *UND* 0000000000000000 evsignal_base
0000000000001410 g F .text 000000000000000e event_loop
0000000000001420 g F .text 0000000000000007 event_dispatch
0000000000001430 g F .text 0000000000000007 event_base_dispatch
0000000000001440 g F .text 00000000000001f5 event_add
0000000000001640 g F .text 000000000000013a event_base_once
0000000000001780 g F .text 000000000000001d event_once
00000000000017a0 g F .text 000000000000001e event_loopexit
00000000000017c0 g F .text 000000000000001a event_base_loopexit
0000000000000000 *UND* 0000000000000000 pollops
0000000000000000 *UND* 0000000000000000 selectopsbuffer.o: file format elf64-x86-64SYMBOL TABLE:
0000000000000000 l df *ABS* 0000000000000000 buffer.c
0000000000000000 l d .text 0000000000000000 .text
0000000000000000 l d .data 0000000000000000 .data
0000000000000000 l d .bss 0000000000000000 .bss
0000000000000000 l d .debug_abbrev 0000000000000000 .debug_abbrev
0000000000000000 l d .debug_info 0000000000000000 .debug_info
0000000000000000 l d .debug_line 0000000000000000 .debug_line
0000000000000190 l F .text 0000000000000025 evbuffer_align
0000000000000000 l d .rodata.str1.1 0000000000000000 .rodata.str1.1
0000000000000000 l O .rodata 0000000000000012 __func__.4672
0000000000000020 l O .rodata 0000000000000015 __PRETTY_FUNCTION__.4627
0000000000000000 l d .rodata 0000000000000000 .rodata
0000000000000000 l d .debug_frame 0000000000000000 .debug_frame
0000000000000000 l d .eh_frame 0000000000000000 .eh_frame
0000000000000000 l d .debug_loc 0000000000000000 .debug_loc
0000000000000000 l d .debug_pubnames 0000000000000000 .debug_pubnames
0000000000000000 l d .debug_aranges 0000000000000000 .debug_aranges
0000000000000000 l d .debug_ranges 0000000000000000 .debug_ranges
0000000000000000 l d .debug_str 0000000000000000 .debug_str
0000000000000000 l d .note.GNU-stack 0000000000000000 .note.GNU-stack
0000000000000000 l d .comment 0000000000000000 .comment
0000000000000000 g F .text 0000000000000056 evbuffer_drain
0000000000000060 g F .text 0000000000000009 evbuffer_setcb
0000000000000070 g F .text 0000000000000072 evbuffer_find
0000000000000000 *UND* 0000000000000000 memchr
00000000000000f0 g F .text 000000000000004d evbuffer_write
0000000000000000 *UND* 0000000000000000 write
0000000000000140 g F .text 0000000000000049 evbuffer_remove
0000000000000000 *UND* 0000000000000000 memcpy
0000000000000000 *UND* 0000000000000000 memmove
00000000000001c0 g F .text 000000000000009c evbuffer_expand
0000000000000000 *UND* 0000000000000000 realloc
0000000000000260 g F .text 000000000000012f evbuffer_read
0000000000000000 *UND* 0000000000000000 ioctl
0000000000000000 *UND* 0000000000000000 read
0000000000000390 g F .text 00000000000000a0 evbuffer_add
0000000000000430 g F .text 00000000000000e0 evbuffer_add_buffer
0000000000000510 g F .text 0000000000000126 evbuffer_readline
0000000000000000 *UND* 0000000000000000 malloc
0000000000000000 *UND* 0000000000000000 stderr
0000000000000000 *UND* 0000000000000000 fprintf
0000000000000640 g F .text 00000000000000f2 evbuffer_add_vprintf
0000000000000000 *UND* 0000000000000000 evutil_vsnprintf
0000000000000000 *UND* 0000000000000000 __assert_fail
0000000000000740 g F .text 000000000000008e evbuffer_add_printf
00000000000007d0 g F .text 000000000000001b evbuffer_free
0000000000000000 *UND* 0000000000000000 free
00000000000007f0 g F .text 000000000000000f evbuffer_new
0000000000000000 *UND* 0000000000000000 callocevbuffer.o: file format elf64-x86-64SYMBOL TABLE:
0000000000000000 l df *ABS* 0000000000000000 evbuffer.c
0000000000000000 l d .text 0000000000000000 .text
0000000000000000 l d .data 0000000000000000 .data
0000000000000000 l d .bss 0000000000000000 .bss
0000000000000000 l d .debug_abbrev 0000000000000000 .debug_abbrev
0000000000000000 l d .debug_info 0000000000000000 .debug_info
0000000000000000 l d .debug_line 0000000000000000 .debug_line
0000000000000080 l F .text 000000000000002a bufferevent_add
0000000000000650 l F .text 00000000000001d3 bufferevent_readcb
00000000000004c0 l F .text 00000000000000fb bufferevent_writecb
0000000000000000 l d .debug_frame 0000000000000000 .debug_frame
0000000000000000 l d .eh_frame 0000000000000000 .eh_frame
0000000000000000 l d .debug_loc 0000000000000000 .debug_loc
0000000000000000 l d .debug_pubnames 0000000000000000 .debug_pubnames
0000000000000000 l d .debug_aranges 0000000000000000 .debug_aranges
0000000000000000 l d .debug_ranges 0000000000000000 .debug_ranges
0000000000000000 l d .debug_str 0000000000000000 .debug_str
0000000000000000 l d .note.GNU-stack 0000000000000000 .note.GNU-stack
0000000000000000 l d .comment 0000000000000000 .comment
0000000000000000 g F .text 000000000000001d bufferevent_setcb
0000000000000020 g F .text 0000000000000051 bufferevent_base_set
0000000000000000 *UND* 0000000000000000 event_base_set
0000000000000000 *UND* 0000000000000000 event_add
00000000000000b0 g F .text 00000000000000ad bufferevent_settimeout
0000000000000000 *UND* 0000000000000000 event_pending
0000000000000160 g F .text 0000000000000077 bufferevent_enable
00000000000001e0 g F .text 000000000000006f bufferevent_disable
0000000000000000 *UND* 0000000000000000 event_del
0000000000000250 g F .text 0000000000000057 bufferevent_read
0000000000000000 *UND* 0000000000000000 memcpy
0000000000000000 *UND* 0000000000000000 evbuffer_drain
00000000000002b0 g F .text 000000000000006a bufferevent_write
0000000000000000 *UND* 0000000000000000 evbuffer_add
0000000000000320 g F .text 0000000000000041 bufferevent_write_buffer
0000000000000370 g F .text 000000000000003a bufferevent_free
0000000000000000 *UND* 0000000000000000 evbuffer_free
0000000000000000 *UND* 0000000000000000 free
00000000000003b0 g F .text 000000000000004e bufferevent_priority_set
0000000000000000 *UND* 0000000000000000 event_priority_set
0000000000000400 g F .text 00000000000000b9 bufferevent_setfd
0000000000000000 *UND* 0000000000000000 event_set
0000000000000000 *UND* 0000000000000000 evbuffer_write
0000000000000000 *UND* 0000000000000000 __errno_location
00000000000005c0 g F .text 0000000000000040 bufferevent_read_pressure_cb
0000000000000000 *UND* 0000000000000000 evbuffer_setcb
0000000000000600 g F .text 0000000000000042 bufferevent_setwatermark
0000000000000000 *UND* 0000000000000000 evbuffer_read
0000000000000830 g F .text 00000000000000fd bufferevent_new
0000000000000000 *UND* 0000000000000000 calloc
0000000000000000 *UND* 0000000000000000 evbuffer_newlog.o: file format elf64-x86-64SYMBOL TABLE:
0000000000000000 l df *ABS* 0000000000000000 log.c
0000000000000000 l d .text 0000000000000000 .text
0000000000000000 l d .data 0000000000000000 .data
0000000000000000 l d .bss 0000000000000000 .bss
0000000000000000 l d .debug_abbrev 0000000000000000 .debug_abbrev
0000000000000000 l d .debug_info 0000000000000000 .debug_info
0000000000000000 l d .debug_line 0000000000000000 .debug_line
0000000000000000 l O .bss 0000000000000008 log_fn
0000000000000000 l d .rodata.str1.1 0000000000000000 .rodata.str1.1
0000000000000010 l F .text 0000000000000144 _warn_helper
0000000000000000 l d .debug_frame 0000000000000000 .debug_frame
0000000000000000 l d .eh_frame 0000000000000000 .eh_frame
0000000000000000 l d .debug_loc 0000000000000000 .debug_loc
0000000000000000 l d .debug_pubnames 0000000000000000 .debug_pubnames
0000000000000000 l d .debug_aranges 0000000000000000 .debug_aranges
0000000000000000 l d .debug_ranges 0000000000000000 .debug_ranges
0000000000000000 l d .debug_str 0000000000000000 .debug_str
0000000000000000 l d .note.GNU-stack 0000000000000000 .note.GNU-stack
0000000000000000 l d .comment 0000000000000000 .comment
0000000000000000 g F .text 0000000000000008 event_set_log_callback
0000000000000000 *UND* 0000000000000000 evutil_vsnprintf
0000000000000000 *UND* 0000000000000000 stderr
0000000000000000 *UND* 0000000000000000 fprintf
0000000000000000 *UND* 0000000000000000 strerror
0000000000000000 *UND* 0000000000000000 evutil_snprintf
0000000000000160 g F .text 000000000000009d _event_debugx
0000000000000200 g F .text 00000000000000a0 event_msgx
00000000000002a0 g F .text 00000000000000a0 event_warnx
0000000000000340 g F .text 000000000000009d event_errx
0000000000000000 *UND* 0000000000000000 exit
00000000000003e0 g F .text 00000000000000ab event_warn
0000000000000000 *UND* 0000000000000000 __errno_location
0000000000000490 g F .text 00000000000000b2 event_errevutil.o: file format elf64-x86-64SYMBOL TABLE:
0000000000000000 l df *ABS* 0000000000000000 evutil.c
0000000000000000 l d .text 0000000000000000 .text
0000000000000000 l d .data 0000000000000000 .data
0000000000000000 l d .bss 0000000000000000 .bss
0000000000000000 l d .debug_abbrev 0000000000000000 .debug_abbrev
0000000000000000 l d .debug_info 0000000000000000 .debug_info
0000000000000000 l d .debug_line 0000000000000000 .debug_line
0000000000000000 l d .rodata.str1.1 0000000000000000 .rodata.str1.1
0000000000000000 l d .debug_frame 0000000000000000 .debug_frame
0000000000000000 l d .eh_frame 0000000000000000 .eh_frame
0000000000000000 l d .debug_loc 0000000000000000 .debug_loc
0000000000000000 l d .debug_pubnames 0000000000000000 .debug_pubnames
0000000000000000 l d .debug_aranges 0000000000000000 .debug_aranges
0000000000000000 l d .debug_str 0000000000000000 .debug_str
0000000000000000 l d .note.GNU-stack 0000000000000000 .note.GNU-stack
0000000000000000 l d .comment 0000000000000000 .comment
0000000000000000 g F .text 0000000000000058 evutil_getenv
0000000000000000 *UND* 0000000000000000 getuid
0000000000000000 *UND* 0000000000000000 geteuid
0000000000000000 *UND* 0000000000000000 getgid
0000000000000000 *UND* 0000000000000000 getegid
0000000000000000 *UND* 0000000000000000 getenv
0000000000000060 g F .text 000000000000002e evutil_vsnprintf
0000000000000000 *UND* 0000000000000000 vsnprintf
0000000000000090 g F .text 0000000000000089 evutil_snprintf
0000000000000120 g F .text 0000000000000007 evutil_strtoll
0000000000000000 *UND* 0000000000000000 __strtoll_internal
0000000000000130 g F .text 000000000000002b evutil_make_socket_nonblocking
0000000000000000 *UND* 0000000000000000 fcntl
0000000000000000 *UND* 0000000000000000 event_warn
0000000000000160 g F .text 0000000000000005 evutil_socketpair
0000000000000000 *UND* 0000000000000000 socketpairevent_tagging.o: file format elf64-x86-64SYMBOL TABLE:
0000000000000000 l df *ABS* 0000000000000000 event_tagging.c
0000000000000000 l d .text 0000000000000000 .text
0000000000000000 l d .data 0000000000000000 .data
0000000000000000 l d .bss 0000000000000000 .bss
0000000000000000 l d .debug_abbrev 0000000000000000 .debug_abbrev
0000000000000000 l d .debug_info 0000000000000000 .debug_info
0000000000000000 l d .debug_line 0000000000000000 .debug_line
0000000000000000 l F .text 00000000000000b7 decode_int_internal
00000000000000e0 l F .text 000000000000006f decode_tag_internal
0000000000000000 l O .bss 0000000000000008 _buf
0000000000000000 l d .rodata.str1.1 0000000000000000 .rodata.str1.1
0000000000000000 l O .rodata 0000000000000017 __func__.4433
0000000000000017 l O .rodata 000000000000000b __func__.4171
0000000000000000 l d .rodata 0000000000000000 .rodata
0000000000000000 l d .debug_frame 0000000000000000 .debug_frame
0000000000000000 l d .eh_frame 0000000000000000 .eh_frame
0000000000000000 l d .debug_loc 0000000000000000 .debug_loc
0000000000000000 l d .debug_pubnames 0000000000000000 .debug_pubnames
0000000000000000 l d .debug_aranges 0000000000000000 .debug_aranges
0000000000000000 l d .debug_ranges 0000000000000000 .debug_ranges
0000000000000000 l d .debug_str 0000000000000000 .debug_str
0000000000000000 l d .note.GNU-stack 0000000000000000 .note.GNU-stack
0000000000000000 l d .comment 0000000000000000 .comment
0000000000000000 *UND* 0000000000000000 evbuffer_drain
00000000000000c0 g F .text 000000000000001d evtag_decode_int
0000000000000150 g F .text 0000000000000049 evtag_consume
00000000000001a0 g F .text 0000000000000093 evtag_payload_length
0000000000000240 g F .text 00000000000000aa evtag_peek_length
00000000000002f0 g F .text 0000000000000010 evtag_peek
0000000000000300 g F .text 000000000000000a evtag_decode_tag
0000000000000310 g F .text 00000000000000b0 evtag_unmarshal_int
0000000000000000 *UND* 0000000000000000 evbuffer_add
00000000000003c0 g F .text 0000000000000094 evtag_unmarshal
0000000000000460 g F .text 00000000000000a5 evtag_unmarshal_timeval
0000000000000510 g F .text 00000000000000b3 evtag_unmarshal_string
0000000000000000 *UND* 0000000000000000 calloc
0000000000000000 *UND* 0000000000000000 evbuffer_remove
0000000000000000 *UND* 0000000000000000 event_err
00000000000005d0 g F .text 000000000000008f evtag_unmarshal_fixed
0000000000000000 *UND* 0000000000000000 memcpy
0000000000000660 g F .text 0000000000000068 evtag_encode_tag
00000000000006d0 g F .text 00000000000000c7 encode_int
00000000000007a0 g F .text 000000000000007a evtag_marshal_int
0000000000000000 *UND* 0000000000000000 evbuffer_add_buffer
0000000000000820 g F .text 000000000000004c evtag_marshal
0000000000000870 g F .text 0000000000000076 evtag_marshal_timeval
00000000000008f0 g F .text 0000000000000046 evtag_marshal_string
0000000000000000 *UND* 0000000000000000 strlen
0000000000000940 g F .text 000000000000003c evtag_init
0000000000000000 *UND* 0000000000000000 evbuffer_newhttp.o: file format elf64-x86-64SYMBOL TABLE:
0000000000000000 l df *ABS* 0000000000000000 http.c
0000000000000000 l d .text 0000000000000000 .text
0000000000000000 l d .data 0000000000000000 .data
0000000000000000 l d .bss 0000000000000000 .bss
0000000000000000 l d .debug_abbrev 0000000000000000 .debug_abbrev
0000000000000000 l d .debug_info 0000000000000000 .debug_info
0000000000000000 l d .debug_line 0000000000000000 .debug_line
0000000000000000 l d .rodata.str1.1 0000000000000000 .rodata.str1.1
0000000000000000 l F .text 000000000000003b html_replace
0000000000000000 l d .rodata 0000000000000000 .rodata
0000000000000040 l F .text 000000000000000d evhttp_connected
0000000000000143 l O .rodata 000000000000000e __func__.7608
0000000000000130 l O .rodata 0000000000000013 __func__.7651
0000000000000470 l F .text 0000000000000068 evhttp_new_object
0000000000000160 l O .rodata 0000000000000012 __func__.7552
00000000000004f0 l F .text 00000000000000cc evhttp_add_header_internal
00000000000001c0 l O .rodata 000000000000001b __func__.6878
00000000000005c0 l F .text 0000000000000013 evhttp_connection_stop_detectclose
00000000000003f0 l O .rodata 0000000000000016 __func__.7071
00000000000012b0 l F .text 00000000000000a5 accept_socket
00000000000009f0 l F .text 000000000000003c evhttp_add_event
0000000000000aa0 l F .text 00000000000000a0 evhttp_associate_new_request_with_connection
0000000000003c30 l F .text 000000000000013c evhttp_handle_request
0000000000000100 l O .rodata 000000000000002d __func__.7717
0000000000000b40 l F .text 00000000000000c1 make_addrinfo
0000000000000c10 l F .text 0000000000000112 bind_socket_ai
0000000000000d30 l F .text 000000000000007e bind_socket
0000000000000180 l O .rodata 0000000000000013 __func__.7529
0000000000000ea0 l F .text 00000000000000e0 evhttp_decode_uri_internal
00000000000001e0 l O .rodata 0000000000000012 __func__.7338
0000000000000200 l O .rodata 0000000000000100 uri_chars
0000000000000000 l d .rodata.str1.8 0000000000000000 .rodata.str1.8
00000000000003d0 l O .rodata 000000000000001b __PRETTY_FUNCTION__.7090
0000000000000172 l O .rodata 000000000000000e __func__.7512
0000000000000440 l O .rodata 0000000000000021 __PRETTY_FUNCTION__.6283
0000000000000480 l O .rodata 0000000000000024 __func__.6275
00000000000004c0 l O .rodata 0000000000000024 __PRETTY_FUNCTION__.6271
0000000000001430 l F .text 000000000000005b evhttp_write_connectioncb
0000000000000390 l O .rodata 000000000000001a __PRETTY_FUNCTION__.6238
0000000000001550 l F .text 0000000000000035 evhttp_is_connection_keepalive
0000000000001590 l F .text 0000000000000071 evhttp_is_connection_close
0000000000001610 l F .text 0000000000000104 evhttp_send_done
0000000000000310 l O .rodata 0000000000000011 __PRETTY_FUNCTION__.7175
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0000000000000000 l d .eh_frame 0000000000000000 .eh_frame
0000000000000000 l d .debug_loc 0000000000000000 .debug_loc
0000000000000000 l d .debug_pubnames 0000000000000000 .debug_pubnames
0000000000000000 l d .debug_aranges 0000000000000000 .debug_aranges
0000000000000000 l d .debug_ranges 0000000000000000 .debug_ranges
0000000000000000 l d .debug_str 0000000000000000 .debug_str
0000000000000000 l d .note.GNU-stack 0000000000000000 .note.GNU-stack
0000000000000000 l d .comment 0000000000000000 .comment
0000000000000000 *UND* 0000000000000000 evsignal_dealloc
0000000000000000 *UND* 0000000000000000 free
0000000000000000 *UND* 0000000000000000 close
0000000000000000 *UND* 0000000000000000 epoll_wait
0000000000000000 *UND* 0000000000000000 event_active
0000000000000000 *UND* 0000000000000000 realloc
0000000000000000 *UND* 0000000000000000 evsignal_process
0000000000000000 *UND* 0000000000000000 __errno_location
0000000000000000 *UND* 0000000000000000 event_warn
0000000000000000 *UND* 0000000000000000 epoll_ctl
0000000000000000 *UND* 0000000000000000 evsignal_del
0000000000000000 *UND* 0000000000000000 memset
0000000000000000 *UND* 0000000000000000 evsignal_add
0000000000000000 *UND* 0000000000000000 evutil_getenv
0000000000000000 *UND* 0000000000000000 epoll_create
0000000000000000 *UND* 0000000000000000 fcntl
0000000000000000 *UND* 0000000000000000 calloc
0000000000000000 *UND* 0000000000000000 malloc
0000000000000000 *UND* 0000000000000000 evsignal_init
0000000000000000 g O .rodata 0000000000000038 epollopssignal.o: file format elf64-x86-64SYMBOL TABLE:
0000000000000000 l df *ABS* 0000000000000000 signal.c
0000000000000000 l d .text 0000000000000000 .text
0000000000000000 l d .data 0000000000000000 .data
0000000000000000 l d .bss 0000000000000000 .bss
0000000000000000 l d .debug_abbrev 0000000000000000 .debug_abbrev
0000000000000000 l d .debug_info 0000000000000000 .debug_info
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0000000000000000 l d .rodata.str1.1 0000000000000000 .rodata.str1.1
0000000000000000 l d .rodata.str1.8 0000000000000000 .rodata.str1.8
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000000000000004f l O .rodata 000000000000000c __func__.4948
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0000000000000000 l d .eh_frame 0000000000000000 .eh_frame
0000000000000000 l d .debug_loc 0000000000000000 .debug_loc
0000000000000000 l d .debug_pubnames 0000000000000000 .debug_pubnames
0000000000000000 l d .debug_aranges 0000000000000000 .debug_aranges
0000000000000000 l d .debug_ranges 0000000000000000 .debug_ranges
0000000000000000 l d .debug_str 0000000000000000 .debug_str
0000000000000000 l d .note.GNU-stack 0000000000000000 .note.GNU-stack
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0000000000000000 *UND* 0000000000000000 event_del
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0000000000000000 *UND* 0000000000000000 sigaction
0000000000000000 *UND* 0000000000000000 free
0000000000000000 *UND* 0000000000000000 event_warn
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0000000000000000 *UND* 0000000000000000 close
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0000000000000000 *UND* 0000000000000000 __assert_fail
0000000000000000 *UND* 0000000000000000 __errno_location
0000000000000000 g O .bss 0000000000000008 evsignal_base
0000000000000000 *UND* 0000000000000000 send
0000000000000300 g F .text 0000000000000170 _evsignal_set_handler
0000000000000000 *UND* 0000000000000000 realloc
0000000000000000 *UND* 0000000000000000 memset
0000000000000000 *UND* 0000000000000000 malloc
0000000000000000 *UND* 0000000000000000 sigfillset
0000000000000470 g F .text 000000000000010a evsignal_add
0000000000000000 *UND* 0000000000000000 event_errx
0000000000000000 *UND* 0000000000000000 event_add
0000000000000580 g F .text 0000000000000143 evsignal_init
0000000000000000 *UND* 0000000000000000 evutil_socketpair
0000000000000000 *UND* 0000000000000000 fcntl
0000000000000000 *UND* 0000000000000000 evutil_make_socket_nonblocking
0000000000000000 *UND* 0000000000000000 event_set
0000000000000000 *UND* 0000000000000000 event_err
0000000000000000 *UND* 0000000000000000 recv[root@Betty lib]#作为对比提供 nm 的输出结果。
nm - list symbols from object files
==================
-s
--print-armap
When listing symbols from archive members, include the index: a mapping (stored in the archive by ar or ranlib) of which modules contain definitions for which names.
===================
[root@Betty lib]# nm -s libevent.a Archive index:
event_base_loopbreak in event.o
event_loopbreak in event.o
current_base in event.o
event_set in event.o
event_base_set in event.o
event_priority_set in event.o
event_get_version in event.o
event_get_method in event.o
event_base_get_method in event.o
event_pending in event.o
event_base_priority_init in event.o
event_priority_init in event.o
event_base_new in event.o
event_init in event.o
event_del in event.o
event_base_free in event.o
event_reinit in event.o
event_active in event.o
event_base_loop in event.o
event_loop in event.o
event_dispatch in event.o
event_base_dispatch in event.o
event_add in event.o
event_base_once in event.o
event_once in event.o
event_loopexit in event.o
event_base_loopexit in event.o
evbuffer_drain in buffer.o
evbuffer_setcb in buffer.o
evbuffer_find in buffer.o
evbuffer_write in buffer.o
evbuffer_remove in buffer.o
evbuffer_expand in buffer.o
evbuffer_read in buffer.o
evbuffer_add in buffer.o
evbuffer_add_buffer in buffer.o
evbuffer_readline in buffer.o
evbuffer_add_vprintf in buffer.o
evbuffer_add_printf in buffer.o
evbuffer_free in buffer.o
evbuffer_new in buffer.o
bufferevent_setcb in evbuffer.o
bufferevent_base_set in evbuffer.o
bufferevent_settimeout in evbuffer.o
bufferevent_enable in evbuffer.o
bufferevent_disable in evbuffer.o
bufferevent_read in evbuffer.o
bufferevent_write in evbuffer.o
bufferevent_write_buffer in evbuffer.o
bufferevent_free in evbuffer.o
bufferevent_priority_set in evbuffer.o
bufferevent_setfd in evbuffer.o
bufferevent_read_pressure_cb in evbuffer.o
bufferevent_setwatermark in evbuffer.o
bufferevent_new in evbuffer.o
event_set_log_callback in log.o
_event_debugx in log.o
event_msgx in log.o
event_warnx in log.o
event_errx in log.o
event_warn in log.o
event_err in log.o
evutil_getenv in evutil.o
evutil_vsnprintf in evutil.o
evutil_snprintf in evutil.o
evutil_strtoll in evutil.o
evutil_make_socket_nonblocking in evutil.o
evutil_socketpair in evutil.o
evtag_decode_int in event_tagging.o
evtag_consume in event_tagging.o
evtag_payload_length in event_tagging.o
evtag_peek_length in event_tagging.o
evtag_peek in event_tagging.o
evtag_decode_tag in event_tagging.o
evtag_unmarshal_int in event_tagging.o
evtag_unmarshal in event_tagging.o
evtag_unmarshal_timeval in event_tagging.o
evtag_unmarshal_string in event_tagging.o
evtag_unmarshal_fixed in event_tagging.o
evtag_encode_tag in event_tagging.o
encode_int in event_tagging.o
evtag_marshal_int in event_tagging.o
evtag_marshal in event_tagging.o
evtag_marshal_timeval in event_tagging.o
evtag_marshal_string in event_tagging.o
evtag_init in event_tagging.o
evhttp_connection_set_timeout in http.o
evhttp_connection_set_retries in http.o
evhttp_connection_set_closecb in http.o
evhttp_connection_get_peer in http.o
evhttp_set_timeout in http.o
evhttp_set_gencb in http.o
evhttp_request_set_chunked_cb in http.o
evhttp_request_uri in http.o
evhttp_clear_headers in http.o
evhttp_response_code in http.o
evhttp_request_free in http.o
evhttp_del_cb in http.o
evhttp_set_cb in http.o
evhttp_request_new in http.o
evhttp_new in http.o
evhttp_connection_free in http.o
evhttp_free in http.o
evhttp_connection_new in http.o
evhttp_accept_socket in http.o
evhttp_start_read in http.o
evhttp_read in http.o
evhttp_bind_socket in http.o
evhttp_start in http.o
evhttp_decode_uri in http.o
evhttp_encode_uri in http.o
evhttp_connection_set_base in http.o
evhttp_get_request in http.o
evhttp_connection_set_local_port in http.o
evhttp_connection_set_local_address in http.o
evhttp_remove_header in http.o
evhttp_find_header in http.o
evhttp_write_buffer in http.o
evhttp_write in http.o
evhttp_send_reply_end in http.o
evhttp_send_reply_chunk in http.o
evhttp_parse_firstline in http.o
evhttp_add_header in http.o
evhttp_parse_headers in http.o
evhttp_connection_reset in http.o
evhttp_connection_connect in http.o
evhttp_connection_fail in http.o
evhttp_hostportfile in http.o
evhttp_make_header in http.o
evhttp_send_reply_start in http.o
evhttp_send_page in http.o
evhttp_send_error in http.o
evhttp_make_request in http.o
evhttp_htmlescape in http.o
evhttp_parse_query in http.o
evhttp_send_reply in http.o
evdns_set_log_fn in evdns.o
evdns_set_transaction_id_fn in evdns.o
evdns_count_nameservers in evdns.o
evdns_err_to_string in evdns.o
evdns_clear_nameservers_and_suspend in evdns.o
evdns_server_request_drop in evdns.o
evdns_close_server_port in evdns.o
evdns_resume in evdns.o
evdns_shutdown in evdns.o
evdns_server_request_get_requesting_addr in evdns.o
evdns_search_ndots_set in evdns.o
evdns_search_add in evdns.o
evdns_search_clear in evdns.o
evdns_add_server_port in evdns.o
evdns_server_request_add_reply in evdns.o
evdns_server_request_add_cname_reply in evdns.o
evdns_server_request_add_ptr_reply in evdns.o
evdns_server_request_add_aaaa_reply in evdns.o
evdns_server_request_add_a_reply in evdns.o
evdns_server_request_respond in evdns.o
evdns_resolve_reverse_ipv6 in evdns.o
evdns_resolve_reverse in evdns.o
evdns_resolve_ipv6 in evdns.o
evdns_resolve_ipv4 in evdns.o
evdns_set_option in evdns.o
evdns_nameserver_ip_add in evdns.o
evdns_nameserver_add in evdns.o
evdns_resolv_conf_parse in evdns.o
evdns_init in evdns.o
evrpc_pool_set_timeout in evrpc.o
evrpc_reqstate_free in evrpc.o
evrpc_remove_hook in evrpc.o
evrpc_make_request in evrpc.o
evrpc_pool_add_connection in evrpc.o
evrpc_pool_free in evrpc.o
evrpc_pool_new in evrpc.o
evrpc_add_hook in evrpc.o
evrpc_request_done in evrpc.o
evrpc_unregister_rpc in evrpc.o
evrpc_free in evrpc.o
evrpc_register_rpc in evrpc.o
evrpc_init in evrpc.o
_event_strlcpy in strlcpy.o
selectops in select.o
pollops in poll.o
epollops in epoll.o
evsignal_process in signal.o
_evsignal_restore_handler in signal.o
evsignal_dealloc in signal.o
evsignal_del in signal.o
evsignal_base in signal.o
_evsignal_set_handler in signal.o
evsignal_add in signal.o
evsignal_init in signal.oevent.o:
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0000000000000310 T evtag_unmarshal_int
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0000000000000460 T evtag_unmarshal_timevalU memcpyU strlenhttp.o:
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[root@Betty lib]#示例二：以自定义文件 objtest.c 进行演示。
示例程序如下 。
[root@Betty Cpp]# vi objtest.c
/*
g++ -g -Wstrict-prototypes -Wall -Wunused -o objtest objtest.c
*/
#include <unistd.h>
int main ( int argc, char * argv[] )
{execl( "/bin/sh", "/bin/sh", "-i", 0 );return 0;
}执行编译。
[root@Betty Cpp]# g++ -g -Wstrict-prototypes -Wall -Wunused -o objtest objtest.c
cc1plus: warning: command line option "-Wstrict-prototypes" is valid for Ada/C/ObjC but not for C++
objtest.c: In function 'int main(int, char**)':
objtest.c:7: warning: missing sentinel in function call
[root@Betty Cpp]#
[root@Betty Cpp]# ll
total 16
-rwxr-xr-x 1 root root 8587 Jul 18 11:04 objtest
-rw-r--r-- 1 root root 190 Jul 18 10:55 objtest.c
[root@Betty Cpp]#虽然能够编译出来东东，但是出现了若干警告信息。
cc1plus: warning: command line option "-Wstrict-prototypes" is valid for Ada/C/ObjC but not for C++
是因为 -Wstrict-prototypes 是 C only 的，所以 g++ 应该改为 gcc 。
参考：man gcc
objtest.c:7: warning: missing sentinel in function call
是因为在调用 execl( "/bin/sh", "/bin/sh", "-i", 0 ); 的时候，最后一个参数的格式不符合要求，应该改为 (char *)0 或者 (char *)NULL 。
参考：man execl
另外 -Wall 其实是隐含包含了 -Wunused 的，所以可以将 -Wunused 去掉。
完成修改后不会输出仍和警告信息。
[root@Betty Cpp]# gcc -g -Wstrict-prototypes -Wall -o objtest objtest.c
[root@Betty Cpp]#使用 objdump 输出相关信息。
[root@Betty Cpp]#
[root@Betty Cpp]# objdump -j .text -Sl objtest objtest: file format elf64-x86-64Disassembly of section .text:00000000004004a0 <_start>:
_start():4004a0: 31 ed xor %ebp,%ebp4004a2: 49 89 d1 mov %rdx,%r94004a5: 5e pop %rsi4004a6: 48 89 e2 mov %rsp,%rdx4004a9: 48 83 e4 f0 and $0xfffffffffffffff0,%rsp4004ad: 50 push %rax4004ae: 54 push %rsp4004af: 49 c7 c0 b0 05 40 00 mov $0x4005b0,%r84004b6: 48 c7 c1 c0 05 40 00 mov $0x4005c0,%rcx4004bd: 48 c7 c7 78 05 40 00 mov $0x400578,%rdi4004c4: e8 af ff ff ff callq 400478 <__libc_start_main@plt>4004c9: f4 hlt 4004ca: 90 nop 4004cb: 90 nop 00000000004004cc <call_gmon_start>:
call_gmon_start():4004cc: 48 83 ec 08 sub $0x8,%rsp4004d0: 48 8b 05 89 04 20 00 mov 2098313(%rip),%rax # 600960 <_DYNAMIC+0x1c0>4004d7: 48 85 c0 test %rax,%rax4004da: 74 02 je 4004de <call_gmon_start+0x12>4004dc: ff d0 callq *%rax4004de: 48 83 c4 08 add $0x8,%rsp4004e2: c3 retq 4004e3: 90 nop 4004e4: 90 nop 4004e5: 90 nop 4004e6: 90 nop 4004e7: 90 nop 4004e8: 90 nop 4004e9: 90 nop 4004ea: 90 nop 4004eb: 90 nop 4004ec: 90 nop 4004ed: 90 nop 4004ee: 90 nop 4004ef: 90 nop 00000000004004f0 <__do_global_dtors_aux>:
__do_global_dtors_aux():4004f0: 55 push %rbp4004f1: 48 89 e5 mov %rsp,%rbp4004f4: 53 push %rbx4004f5: 48 83 ec 08 sub $0x8,%rsp4004f9: 80 3d a8 04 20 00 00 cmpb $0x0,2098344(%rip) # 6009a8 <completed.6145>400500: 75 44 jne 400546 <__do_global_dtors_aux+0x56>400502: b8 90 07 60 00 mov $0x600790,%eax400507: 48 2d 88 07 60 00 sub $0x600788,%rax40050d: 48 c1 f8 03 sar $0x3,%rax400511: 48 8d 58 ff lea 0xffffffffffffffff(%rax),%rbx400515: 48 8b 05 84 04 20 00 mov 2098308(%rip),%rax # 6009a0 <dtor_idx.6147>40051c: 48 39 c3 cmp %rax,%rbx40051f: 76 1e jbe 40053f <__do_global_dtors_aux+0x4f>400521: 48 83 c0 01 add $0x1,%rax400525: 48 89 05 74 04 20 00 mov %rax,2098292(%rip) # 6009a0 <dtor_idx.6147>40052c: ff 14 c5 88 07 60 00 callq *0x600788(,%rax,8)400533: 48 8b 05 66 04 20 00 mov 2098278(%rip),%rax # 6009a0 <dtor_idx.6147>40053a: 48 39 c3 cmp %rax,%rbx40053d: 77 e2 ja 400521 <__do_global_dtors_aux+0x31>40053f: c6 05 62 04 20 00 01 movb $0x1,2098274(%rip) # 6009a8 <completed.6145>400546: 48 83 c4 08 add $0x8,%rsp40054a: 5b pop %rbx40054b: c9 leaveq 40054c: c3 retq 40054d: 0f 1f 00 nopl (%rax)0000000000400550 <frame_dummy>:
frame_dummy():400550: 55 push %rbp400551: 48 83 3d 3f 02 20 00 cmpq $0x0,2097727(%rip) # 600798 <__JCR_END__>400558: 00 400559: 48 89 e5 mov %rsp,%rbp40055c: 74 16 je 400574 <frame_dummy+0x24>40055e: b8 00 00 00 00 mov $0x0,%eax400563: 48 85 c0 test %rax,%rax400566: 74 0c je 400574 <frame_dummy+0x24>400568: bf 98 07 60 00 mov $0x600798,%edi40056d: 49 89 c3 mov %rax,%r11400570: c9 leaveq 400571: 41 ff e3 jmpq *%r11400574: c9 leaveq 400575: c3 retq 400576: 90 nop 400577: 90 nop 0000000000400578 <main>:
main():
/root/workstation/CODE_TEST/Cpp/objtest.c:5
/*
g++ -g -Wstrict-prototypes -Wall -Wunused -o objtest objtest.c
*/
#include <unistd.h>
int main ( int argc, char * argv[] )400578: 55 push %rbp400579: 48 89 e5 mov %rsp,%rbp40057c: 48 83 ec 10 sub $0x10,%rsp400580: 89 7d fc mov %edi,0xfffffffffffffffc(%rbp)400583: 48 89 75 f0 mov %rsi,0xfffffffffffffff0(%rbp)
/root/workstation/CODE_TEST/Cpp/objtest.c:7
{execl( "/bin/sh", "/bin/sh", "-i", 0 );400587: b9 00 00 00 00 mov $0x0,%ecx40058c: ba a8 06 40 00 mov $0x4006a8,%edx400591: be ab 06 40 00 mov $0x4006ab,%esi400596: bf ab 06 40 00 mov $0x4006ab,%edi40059b: b8 00 00 00 00 mov $0x0,%eax4005a0: e8 c3 fe ff ff callq 400468 <execl@plt>
/root/workstation/CODE_TEST/Cpp/objtest.c:8return 0;4005a5: b8 00 00 00 00 mov $0x0,%eax
/root/workstation/CODE_TEST/Cpp/objtest.c:9
}4005aa: c9 leaveq 4005ab: c3 retq 4005ac: 90 nop 4005ad: 90 nop 4005ae: 90 nop 4005af: 90 nop 00000000004005b0 <__libc_csu_fini>:
__libc_csu_fini():4005b0: f3 c3 repz retq 4005b2: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)4005b9: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)00000000004005c0 <__libc_csu_init>:
__libc_csu_init():4005c0: 4c 89 64 24 e0 mov %r12,0xffffffffffffffe0(%rsp)4005c5: 4c 89 6c 24 e8 mov %r13,0xffffffffffffffe8(%rsp)4005ca: 4c 8d 25 a3 01 20 00 lea 2097571(%rip),%r12 # 600774 <__fini_array_end>4005d1: 4c 89 74 24 f0 mov %r14,0xfffffffffffffff0(%rsp)4005d6: 4c 89 7c 24 f8 mov %r15,0xfffffffffffffff8(%rsp)4005db: 49 89 f6 mov %rsi,%r144005de: 48 89 5c 24 d0 mov %rbx,0xffffffffffffffd0(%rsp)4005e3: 48 89 6c 24 d8 mov %rbp,0xffffffffffffffd8(%rsp)4005e8: 48 83 ec 38 sub $0x38,%rsp4005ec: 41 89 ff mov %edi,%r15d4005ef: 49 89 d5 mov %rdx,%r134005f2: e8 49 fe ff ff callq 400440 <_init>4005f7: 48 8d 05 76 01 20 00 lea 2097526(%rip),%rax # 600774 <__fini_array_end>4005fe: 49 29 c4 sub %rax,%r12400601: 49 c1 fc 03 sar $0x3,%r12400605: 4d 85 e4 test %r12,%r12400608: 74 1e je 400628 <__libc_csu_init+0x68>40060a: 31 ed xor %ebp,%ebp40060c: 48 89 c3 mov %rax,%rbx40060f: 90 nop 400610: 48 83 c5 01 add $0x1,%rbp400614: 4c 89 ea mov %r13,%rdx400617: 4c 89 f6 mov %r14,%rsi40061a: 44 89 ff mov %r15d,%edi40061d: ff 13 callq *(%rbx)40061f: 48 83 c3 08 add $0x8,%rbx400623: 49 39 ec cmp %rbp,%r12400626: 75 e8 jne 400610 <__libc_csu_init+0x50>400628: 48 8b 5c 24 08 mov 0x8(%rsp),%rbx40062d: 48 8b 6c 24 10 mov 0x10(%rsp),%rbp400632: 4c 8b 64 24 18 mov 0x18(%rsp),%r12400637: 4c 8b 6c 24 20 mov 0x20(%rsp),%r1340063c: 4c 8b 74 24 28 mov 0x28(%rsp),%r14400641: 4c 8b 7c 24 30 mov 0x30(%rsp),%r15400646: 48 83 c4 38 add $0x38,%rsp40064a: c3 retq 40064b: 90 nop 40064c: 90 nop 40064d: 90 nop 40064e: 90 nop 40064f: 90 nop 0000000000400650 <__do_global_ctors_aux>:
__do_global_ctors_aux():400650: 55 push %rbp400651: 48 89 e5 mov %rsp,%rbp400654: 53 push %rbx400655: bb 78 07 60 00 mov $0x600778,%ebx40065a: 48 83 ec 08 sub $0x8,%rsp40065e: 48 8b 05 13 01 20 00 mov 2097427(%rip),%rax # 600778 <__CTOR_LIST__>400665: 48 83 f8 ff cmp $0xffffffffffffffff,%rax400669: 74 14 je 40067f <__do_global_ctors_aux+0x2f>40066b: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)400670: 48 83 eb 08 sub $0x8,%rbx400674: ff d0 callq *%rax400676: 48 8b 03 mov (%rbx),%rax400679: 48 83 f8 ff cmp $0xffffffffffffffff,%rax40067d: 75 f1 jne 400670 <__do_global_ctors_aux+0x20>40067f: 48 83 c4 08 add $0x8,%rsp400683: 5b pop %rbx400684: c9 leaveq 400685: c3 retq 400686: 90 nop 400687: 90 nop
[root@Betty Cpp]#反汇编的时候，显示每一行的完整地址。
[root@Betty Cpp]#
[root@Betty Cpp]# objdump -j .text -Sl objtest --prefix-addressesobjtest: file format elf64-x86-64Disassembly of section .text:
_start():
00000000004004a0 <_start> xor %ebp,%ebp
00000000004004a2 <_start+0x2> mov %rdx,%r9
00000000004004a5 <_start+0x5> pop %rsi
00000000004004a6 <_start+0x6> mov %rsp,%rdx
00000000004004a9 <_start+0x9> and $0xfffffffffffffff0,%rsp
00000000004004ad <_start+0xd> push %rax
00000000004004ae <_start+0xe> push %rsp
00000000004004af <_start+0xf> mov $0x4005b0,%r8
00000000004004b6 <_start+0x16> mov $0x4005c0,%rcx
00000000004004bd <_start+0x1d> mov $0x400578,%rdi
00000000004004c4 <_start+0x24> callq 0000000000400478 <__libc_start_main@plt>
00000000004004c9 <_start+0x29> hlt
00000000004004ca <_start+0x2a> nop
00000000004004cb <_start+0x2b> nop
call_gmon_start():
00000000004004cc <call_gmon_start> sub $0x8,%rsp
00000000004004d0 <call_gmon_start+0x4> mov 2098313(%rip),%rax # 0000000000600960 <_DYNAMIC+0x1c0>
00000000004004d7 <call_gmon_start+0xb> test %rax,%rax
00000000004004da <call_gmon_start+0xe> je 00000000004004de <call_gmon_start+0x12>
00000000004004dc <call_gmon_start+0x10> callq *%rax
00000000004004de <call_gmon_start+0x12> add $0x8,%rsp
00000000004004e2 <call_gmon_start+0x16> retq
00000000004004e3 <call_gmon_start+0x17> nop
00000000004004e4 <call_gmon_start+0x18> nop
00000000004004e5 <call_gmon_start+0x19> nop
00000000004004e6 <call_gmon_start+0x1a> nop
00000000004004e7 <call_gmon_start+0x1b> nop
00000000004004e8 <call_gmon_start+0x1c> nop
00000000004004e9 <call_gmon_start+0x1d> nop
00000000004004ea <call_gmon_start+0x1e> nop
00000000004004eb <call_gmon_start+0x1f> nop
00000000004004ec <call_gmon_start+0x20> nop
00000000004004ed <call_gmon_start+0x21> nop
00000000004004ee <call_gmon_start+0x22> nop
00000000004004ef <call_gmon_start+0x23> nop
__do_global_dtors_aux():
00000000004004f0 <__do_global_dtors_aux> push %rbp
00000000004004f1 <__do_global_dtors_aux+0x1> mov %rsp,%rbp
00000000004004f4 <__do_global_dtors_aux+0x4> push %rbx
00000000004004f5 <__do_global_dtors_aux+0x5> sub $0x8,%rsp
00000000004004f9 <__do_global_dtors_aux+0x9> cmpb $0x0,2098344(%rip) # 00000000006009a8 <completed.6145>
0000000000400500 <__do_global_dtors_aux+0x10> jne 0000000000400546 <__do_global_dtors_aux+0x56>
0000000000400502 <__do_global_dtors_aux+0x12> mov $0x600790,%eax
0000000000400507 <__do_global_dtors_aux+0x17> sub $0x600788,%rax
000000000040050d <__do_global_dtors_aux+0x1d> sar $0x3,%rax
0000000000400511 <__do_global_dtors_aux+0x21> lea 0xffffffffffffffff(%rax),%rbx
0000000000400515 <__do_global_dtors_aux+0x25> mov 2098308(%rip),%rax # 00000000006009a0 <dtor_idx.6147>
000000000040051c <__do_global_dtors_aux+0x2c> cmp %rax,%rbx
000000000040051f <__do_global_dtors_aux+0x2f> jbe 000000000040053f <__do_global_dtors_aux+0x4f>
0000000000400521 <__do_global_dtors_aux+0x31> add $0x1,%rax
0000000000400525 <__do_global_dtors_aux+0x35> mov %rax,2098292(%rip) # 00000000006009a0 <dtor_idx.6147>
000000000040052c <__do_global_dtors_aux+0x3c> callq *0x600788(,%rax,8)
0000000000400533 <__do_global_dtors_aux+0x43> mov 2098278(%rip),%rax # 00000000006009a0 <dtor_idx.6147>
000000000040053a <__do_global_dtors_aux+0x4a> cmp %rax,%rbx
000000000040053d <__do_global_dtors_aux+0x4d> ja 0000000000400521 <__do_global_dtors_aux+0x31>
000000000040053f <__do_global_dtors_aux+0x4f> movb $0x1,2098274(%rip) # 00000000006009a8 <completed.6145>
0000000000400546 <__do_global_dtors_aux+0x56> add $0x8,%rsp
000000000040054a <__do_global_dtors_aux+0x5a> pop %rbx
000000000040054b <__do_global_dtors_aux+0x5b> leaveq
000000000040054c <__do_global_dtors_aux+0x5c> retq
000000000040054d <__do_global_dtors_aux+0x5d> nopl (%rax)
frame_dummy():
0000000000400550 <frame_dummy> push %rbp
0000000000400551 <frame_dummy+0x1> cmpq $0x0,2097727(%rip) # 0000000000600798 <__JCR_END__>
0000000000400559 <frame_dummy+0x9> mov %rsp,%rbp
000000000040055c <frame_dummy+0xc> je 0000000000400574 <frame_dummy+0x24>
000000000040055e <frame_dummy+0xe> mov $0x0,%eax
0000000000400563 <frame_dummy+0x13> test %rax,%rax
0000000000400566 <frame_dummy+0x16> je 0000000000400574 <frame_dummy+0x24>
0000000000400568 <frame_dummy+0x18> mov $0x600798,%edi
000000000040056d <frame_dummy+0x1d> mov %rax,%r11
0000000000400570 <frame_dummy+0x20> leaveq
0000000000400571 <frame_dummy+0x21> jmpq *%r11
0000000000400574 <frame_dummy+0x24> leaveq
0000000000400575 <frame_dummy+0x25> retq
0000000000400576 <frame_dummy+0x26> nop
0000000000400577 <frame_dummy+0x27> nop
main():
/root/workstation/CODE_TEST/Cpp/objtest.c:5
/*
g++ -g -Wstrict-prototypes -Wall -Wunused -o objtest objtest.c
*/
#include <unistd.h>
int main ( int argc, char * argv[] )
0000000000400578 <main> push %rbp
0000000000400579 <main+0x1> mov %rsp,%rbp
000000000040057c <main+0x4> sub $0x10,%rsp
0000000000400580 <main+0x8> mov %edi,0xfffffffffffffffc(%rbp)
0000000000400583 <main+0xb> mov %rsi,0xfffffffffffffff0(%rbp)
/root/workstation/CODE_TEST/Cpp/objtest.c:7
{execl( "/bin/sh", "/bin/sh", "-i", 0 );
0000000000400587 <main+0xf> mov $0x0,%ecx
000000000040058c <main+0x14> mov $0x4006a8,%edx
0000000000400591 <main+0x19> mov $0x4006ab,%esi
0000000000400596 <main+0x1e> mov $0x4006ab,%edi
000000000040059b <main+0x23> mov $0x0,%eax
00000000004005a0 <main+0x28> callq 0000000000400468 <execl@plt>
/root/workstation/CODE_TEST/Cpp/objtest.c:8return 0;
00000000004005a5 <main+0x2d> mov $0x0,%eax
/root/workstation/CODE_TEST/Cpp/objtest.c:9
}
00000000004005aa <main+0x32> leaveq
00000000004005ab <main+0x33> retq
00000000004005ac <main+0x34> nop
00000000004005ad <main+0x35> nop
00000000004005ae <main+0x36> nop
00000000004005af <main+0x37> nop
__libc_csu_fini():
00000000004005b0 <__libc_csu_fini> repz retq
00000000004005b2 <__libc_csu_fini+0x2> nopl 0x0(%rax)
00000000004005b9 <__libc_csu_fini+0x9> nopl 0x0(%rax)
__libc_csu_init():
00000000004005c0 <__libc_csu_init> mov %r12,0xffffffffffffffe0(%rsp)
00000000004005c5 <__libc_csu_init+0x5> mov %r13,0xffffffffffffffe8(%rsp)
00000000004005ca <__libc_csu_init+0xa> lea 2097571(%rip),%r12 # 0000000000600774 <__fini_array_end>
00000000004005d1 <__libc_csu_init+0x11> mov %r14,0xfffffffffffffff0(%rsp)
00000000004005d6 <__libc_csu_init+0x16> mov %r15,0xfffffffffffffff8(%rsp)
00000000004005db <__libc_csu_init+0x1b> mov %rsi,%r14
00000000004005de <__libc_csu_init+0x1e> mov %rbx,0xffffffffffffffd0(%rsp)
00000000004005e3 <__libc_csu_init+0x23> mov %rbp,0xffffffffffffffd8(%rsp)
00000000004005e8 <__libc_csu_init+0x28> sub $0x38,%rsp
00000000004005ec <__libc_csu_init+0x2c> mov %edi,%r15d
00000000004005ef <__libc_csu_init+0x2f> mov %rdx,%r13
00000000004005f2 <__libc_csu_init+0x32> callq 0000000000400440 <_init>
00000000004005f7 <__libc_csu_init+0x37> lea 2097526(%rip),%rax # 0000000000600774 <__fini_array_end>
00000000004005fe <__libc_csu_init+0x3e> sub %rax,%r12
0000000000400601 <__libc_csu_init+0x41> sar $0x3,%r12
0000000000400605 <__libc_csu_init+0x45> test %r12,%r12
0000000000400608 <__libc_csu_init+0x48> je 0000000000400628 <__libc_csu_init+0x68>
000000000040060a <__libc_csu_init+0x4a> xor %ebp,%ebp
000000000040060c <__libc_csu_init+0x4c> mov %rax,%rbx
000000000040060f <__libc_csu_init+0x4f> nop
0000000000400610 <__libc_csu_init+0x50> add $0x1,%rbp
0000000000400614 <__libc_csu_init+0x54> mov %r13,%rdx
0000000000400617 <__libc_csu_init+0x57> mov %r14,%rsi
000000000040061a <__libc_csu_init+0x5a> mov %r15d,%edi
000000000040061d <__libc_csu_init+0x5d> callq *(%rbx)
000000000040061f <__libc_csu_init+0x5f> add $0x8,%rbx
0000000000400623 <__libc_csu_init+0x63> cmp %rbp,%r12
0000000000400626 <__libc_csu_init+0x66> jne 0000000000400610 <__libc_csu_init+0x50>
0000000000400628 <__libc_csu_init+0x68> mov 0x8(%rsp),%rbx
000000000040062d <__libc_csu_init+0x6d> mov 0x10(%rsp),%rbp
0000000000400632 <__libc_csu_init+0x72> mov 0x18(%rsp),%r12
0000000000400637 <__libc_csu_init+0x77> mov 0x20(%rsp),%r13
000000000040063c <__libc_csu_init+0x7c> mov 0x28(%rsp),%r14
0000000000400641 <__libc_csu_init+0x81> mov 0x30(%rsp),%r15
0000000000400646 <__libc_csu_init+0x86> add $0x38,%rsp
000000000040064a <__libc_csu_init+0x8a> retq
000000000040064b <__libc_csu_init+0x8b> nop
000000000040064c <__libc_csu_init+0x8c> nop
000000000040064d <__libc_csu_init+0x8d> nop
000000000040064e <__libc_csu_init+0x8e> nop
000000000040064f <__libc_csu_init+0x8f> nop
__do_global_ctors_aux():
0000000000400650 <__do_global_ctors_aux> push %rbp
0000000000400651 <__do_global_ctors_aux+0x1> mov %rsp,%rbp
0000000000400654 <__do_global_ctors_aux+0x4> push %rbx
0000000000400655 <__do_global_ctors_aux+0x5> mov $0x600778,%ebx
000000000040065a <__do_global_ctors_aux+0xa> sub $0x8,%rsp
000000000040065e <__do_global_ctors_aux+0xe> mov 2097427(%rip),%rax # 0000000000600778 <__CTOR_LIST__>
0000000000400665 <__do_global_ctors_aux+0x15> cmp $0xffffffffffffffff,%rax
0000000000400669 <__do_global_ctors_aux+0x19> je 000000000040067f <__do_global_ctors_aux+0x2f>
000000000040066b <__do_global_ctors_aux+0x1b> nopl 0x0(%rax,%rax,1)
0000000000400670 <__do_global_ctors_aux+0x20> sub $0x8,%rbx
0000000000400674 <__do_global_ctors_aux+0x24> callq *%rax
0000000000400676 <__do_global_ctors_aux+0x26> mov (%rbx),%rax
0000000000400679 <__do_global_ctors_aux+0x29> cmp $0xffffffffffffffff,%rax
000000000040067d <__do_global_ctors_aux+0x2d> jne 0000000000400670 <__do_global_ctors_aux+0x20>
000000000040067f <__do_global_ctors_aux+0x2f> add $0x8,%rsp
0000000000400683 <__do_global_ctors_aux+0x33> pop %rbx
0000000000400684 <__do_global_ctors_aux+0x34> leaveq
0000000000400685 <__do_global_ctors_aux+0x35> retq
0000000000400686 <__do_global_ctors_aux+0x36> nop
0000000000400687 <__do_global_ctors_aux+0x37> nop
[root@Betty Cpp]#反汇编输出 .text 中所有 section 的信息。
[root@Betty Cpp]# objdump -j .text -Dl objtestobjtest: file format elf64-x86-64Disassembly of section .text:00000000004004a0 <_start>:
_start():4004a0: 31 ed xor %ebp,%ebp4004a2: 49 89 d1 mov %rdx,%r94004a5: 5e pop %rsi4004a6: 48 89 e2 mov %rsp,%rdx4004a9: 48 83 e4 f0 and $0xfffffffffffffff0,%rsp4004ad: 50 push %rax4004ae: 54 push %rsp4004af: 49 c7 c0 b0 05 40 00 mov $0x4005b0,%r84004b6: 48 c7 c1 c0 05 40 00 mov $0x4005c0,%rcx4004bd: 48 c7 c7 78 05 40 00 mov $0x400578,%rdi4004c4: e8 af ff ff ff callq 400478 <__libc_start_main@plt>4004c9: f4 hlt 4004ca: 90 nop 4004cb: 90 nop 00000000004004cc <call_gmon_start>:
call_gmon_start():4004cc: 48 83 ec 08 sub $0x8,%rsp4004d0: 48 8b 05 89 04 20 00 mov 2098313(%rip),%rax # 600960 <_DYNAMIC+0x1c0>4004d7: 48 85 c0 test %rax,%rax4004da: 74 02 je 4004de <call_gmon_start+0x12>4004dc: ff d0 callq *%rax4004de: 48 83 c4 08 add $0x8,%rsp4004e2: c3 retq 4004e3: 90 nop 4004e4: 90 nop 4004e5: 90 nop 4004e6: 90 nop 4004e7: 90 nop 4004e8: 90 nop 4004e9: 90 nop 4004ea: 90 nop 4004eb: 90 nop 4004ec: 90 nop 4004ed: 90 nop 4004ee: 90 nop 4004ef: 90 nop 00000000004004f0 <__do_global_dtors_aux>:
__do_global_dtors_aux():4004f0: 55 push %rbp4004f1: 48 89 e5 mov %rsp,%rbp4004f4: 53 push %rbx4004f5: 48 83 ec 08 sub $0x8,%rsp4004f9: 80 3d a8 04 20 00 00 cmpb $0x0,2098344(%rip) # 6009a8 <completed.6145>400500: 75 44 jne 400546 <__do_global_dtors_aux+0x56>400502: b8 90 07 60 00 mov $0x600790,%eax400507: 48 2d 88 07 60 00 sub $0x600788,%rax40050d: 48 c1 f8 03 sar $0x3,%rax400511: 48 8d 58 ff lea 0xffffffffffffffff(%rax),%rbx400515: 48 8b 05 84 04 20 00 mov 2098308(%rip),%rax # 6009a0 <dtor_idx.6147>40051c: 48 39 c3 cmp %rax,%rbx40051f: 76 1e jbe 40053f <__do_global_dtors_aux+0x4f>400521: 48 83 c0 01 add $0x1,%rax400525: 48 89 05 74 04 20 00 mov %rax,2098292(%rip) # 6009a0 <dtor_idx.6147>40052c: ff 14 c5 88 07 60 00 callq *0x600788(,%rax,8)400533: 48 8b 05 66 04 20 00 mov 2098278(%rip),%rax # 6009a0 <dtor_idx.6147>40053a: 48 39 c3 cmp %rax,%rbx40053d: 77 e2 ja 400521 <__do_global_dtors_aux+0x31>40053f: c6 05 62 04 20 00 01 movb $0x1,2098274(%rip) # 6009a8 <completed.6145>400546: 48 83 c4 08 add $0x8,%rsp40054a: 5b pop %rbx40054b: c9 leaveq 40054c: c3 retq 40054d: 0f 1f 00 nopl (%rax)0000000000400550 <frame_dummy>:
frame_dummy():400550: 55 push %rbp400551: 48 83 3d 3f 02 20 00 cmpq $0x0,2097727(%rip) # 600798 <__JCR_END__>400558: 00 400559: 48 89 e5 mov %rsp,%rbp40055c: 74 16 je 400574 <frame_dummy+0x24>40055e: b8 00 00 00 00 mov $0x0,%eax400563: 48 85 c0 test %rax,%rax400566: 74 0c je 400574 <frame_dummy+0x24>400568: bf 98 07 60 00 mov $0x600798,%edi40056d: 49 89 c3 mov %rax,%r11400570: c9 leaveq 400571: 41 ff e3 jmpq *%r11400574: c9 leaveq 400575: c3 retq 400576: 90 nop 400577: 90 nop 0000000000400578 <main>:
main():
/root/workstation/CODE_TEST/Cpp/objtest.c:5400578: 55 push %rbp400579: 48 89 e5 mov %rsp,%rbp40057c: 48 83 ec 10 sub $0x10,%rsp400580: 89 7d fc mov %edi,0xfffffffffffffffc(%rbp)400583: 48 89 75 f0 mov %rsi,0xfffffffffffffff0(%rbp)
/root/workstation/CODE_TEST/Cpp/objtest.c:7400587: b9 00 00 00 00 mov $0x0,%ecx40058c: ba a8 06 40 00 mov $0x4006a8,%edx400591: be ab 06 40 00 mov $0x4006ab,%esi400596: bf ab 06 40 00 mov $0x4006ab,%edi40059b: b8 00 00 00 00 mov $0x0,%eax4005a0: e8 c3 fe ff ff callq 400468 <execl@plt>
/root/workstation/CODE_TEST/Cpp/objtest.c:84005a5: b8 00 00 00 00 mov $0x0,%eax
/root/workstation/CODE_TEST/Cpp/objtest.c:94005aa: c9 leaveq 4005ab: c3 retq 4005ac: 90 nop 4005ad: 90 nop 4005ae: 90 nop 4005af: 90 nop 00000000004005b0 <__libc_csu_fini>:
__libc_csu_fini():4005b0: f3 c3 repz retq 4005b2: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)4005b9: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)00000000004005c0 <__libc_csu_init>:
__libc_csu_init():4005c0: 4c 89 64 24 e0 mov %r12,0xffffffffffffffe0(%rsp)4005c5: 4c 89 6c 24 e8 mov %r13,0xffffffffffffffe8(%rsp)4005ca: 4c 8d 25 a3 01 20 00 lea 2097571(%rip),%r12 # 600774 <__fini_array_end>4005d1: 4c 89 74 24 f0 mov %r14,0xfffffffffffffff0(%rsp)4005d6: 4c 89 7c 24 f8 mov %r15,0xfffffffffffffff8(%rsp)4005db: 49 89 f6 mov %rsi,%r144005de: 48 89 5c 24 d0 mov %rbx,0xffffffffffffffd0(%rsp)4005e3: 48 89 6c 24 d8 mov %rbp,0xffffffffffffffd8(%rsp)4005e8: 48 83 ec 38 sub $0x38,%rsp4005ec: 41 89 ff mov %edi,%r15d4005ef: 49 89 d5 mov %rdx,%r134005f2: e8 49 fe ff ff callq 400440 <_init>4005f7: 48 8d 05 76 01 20 00 lea 2097526(%rip),%rax # 600774 <__fini_array_end>4005fe: 49 29 c4 sub %rax,%r12400601: 49 c1 fc 03 sar $0x3,%r12400605: 4d 85 e4 test %r12,%r12400608: 74 1e je 400628 <__libc_csu_init+0x68>40060a: 31 ed xor %ebp,%ebp40060c: 48 89 c3 mov %rax,%rbx40060f: 90 nop 400610: 48 83 c5 01 add $0x1,%rbp400614: 4c 89 ea mov %r13,%rdx400617: 4c 89 f6 mov %r14,%rsi40061a: 44 89 ff mov %r15d,%edi40061d: ff 13 callq *(%rbx)40061f: 48 83 c3 08 add $0x8,%rbx400623: 49 39 ec cmp %rbp,%r12400626: 75 e8 jne 400610 <__libc_csu_init+0x50>400628: 48 8b 5c 24 08 mov 0x8(%rsp),%rbx40062d: 48 8b 6c 24 10 mov 0x10(%rsp),%rbp400632: 4c 8b 64 24 18 mov 0x18(%rsp),%r12400637: 4c 8b 6c 24 20 mov 0x20(%rsp),%r1340063c: 4c 8b 74 24 28 mov 0x28(%rsp),%r14400641: 4c 8b 7c 24 30 mov 0x30(%rsp),%r15400646: 48 83 c4 38 add $0x38,%rsp40064a: c3 retq 40064b: 90 nop 40064c: 90 nop 40064d: 90 nop 40064e: 90 nop 40064f: 90 nop 0000000000400650 <__do_global_ctors_aux>:
__do_global_ctors_aux():400650: 55 push %rbp400651: 48 89 e5 mov %rsp,%rbp400654: 53 push %rbx400655: bb 78 07 60 00 mov $0x600778,%ebx40065a: 48 83 ec 08 sub $0x8,%rsp40065e: 48 8b 05 13 01 20 00 mov 2097427(%rip),%rax # 600778 <__CTOR_LIST__>400665: 48 83 f8 ff cmp $0xffffffffffffffff,%rax400669: 74 14 je 40067f <__do_global_ctors_aux+0x2f>40066b: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)400670: 48 83 eb 08 sub $0x8,%rbx400674: ff d0 callq *%rax400676: 48 8b 03 mov (%rbx),%rax400679: 48 83 f8 ff cmp $0xffffffffffffffff,%rax40067d: 75 f1 jne 400670 <__do_global_ctors_aux+0x20>40067f: 48 83 c4 08 add $0x8,%rsp400683: 5b pop %rbx400684: c9 leaveq 400685: c3 retq 400686: 90 nop 400687: 90 nop
[root@Betty Cpp]#
[root@Betty Cpp]#指定数据 .text 代码段的反汇编信息。
[root@Betty Cpp]# objdump -j .text -S objtest objtest: file format elf64-x86-64Disassembly of section .text:00000000004004a0 <_start>:4004a0: 31 ed xor %ebp,%ebp4004a2: 49 89 d1 mov %rdx,%r94004a5: 5e pop %rsi4004a6: 48 89 e2 mov %rsp,%rdx4004a9: 48 83 e4 f0 and $0xfffffffffffffff0,%rsp4004ad: 50 push %rax4004ae: 54 push %rsp4004af: 49 c7 c0 b0 05 40 00 mov $0x4005b0,%r84004b6: 48 c7 c1 c0 05 40 00 mov $0x4005c0,%rcx4004bd: 48 c7 c7 78 05 40 00 mov $0x400578,%rdi4004c4: e8 af ff ff ff callq 400478 <__libc_start_main@plt>4004c9: f4 hlt 4004ca: 90 nop 4004cb: 90 nop 00000000004004cc <call_gmon_start>:4004cc: 48 83 ec 08 sub $0x8,%rsp4004d0: 48 8b 05 89 04 20 00 mov 2098313(%rip),%rax # 600960 <_DYNAMIC+0x1c0>4004d7: 48 85 c0 test %rax,%rax4004da: 74 02 je 4004de <call_gmon_start+0x12>4004dc: ff d0 callq *%rax4004de: 48 83 c4 08 add $0x8,%rsp4004e2: c3 retq 4004e3: 90 nop 4004e4: 90 nop 4004e5: 90 nop 4004e6: 90 nop 4004e7: 90 nop 4004e8: 90 nop 4004e9: 90 nop 4004ea: 90 nop 4004eb: 90 nop 4004ec: 90 nop 4004ed: 90 nop 4004ee: 90 nop 4004ef: 90 nop 00000000004004f0 <__do_global_dtors_aux>:4004f0: 55 push %rbp4004f1: 48 89 e5 mov %rsp,%rbp4004f4: 53 push %rbx4004f5: 48 83 ec 08 sub $0x8,%rsp4004f9: 80 3d a8 04 20 00 00 cmpb $0x0,2098344(%rip) # 6009a8 <completed.6145>400500: 75 44 jne 400546 <__do_global_dtors_aux+0x56>400502: b8 90 07 60 00 mov $0x600790,%eax400507: 48 2d 88 07 60 00 sub $0x600788,%rax40050d: 48 c1 f8 03 sar $0x3,%rax400511: 48 8d 58 ff lea 0xffffffffffffffff(%rax),%rbx400515: 48 8b 05 84 04 20 00 mov 2098308(%rip),%rax # 6009a0 <dtor_idx.6147>40051c: 48 39 c3 cmp %rax,%rbx40051f: 76 1e jbe 40053f <__do_global_dtors_aux+0x4f>400521: 48 83 c0 01 add $0x1,%rax400525: 48 89 05 74 04 20 00 mov %rax,2098292(%rip) # 6009a0 <dtor_idx.6147>40052c: ff 14 c5 88 07 60 00 callq *0x600788(,%rax,8)400533: 48 8b 05 66 04 20 00 mov 2098278(%rip),%rax # 6009a0 <dtor_idx.6147>40053a: 48 39 c3 cmp %rax,%rbx40053d: 77 e2 ja 400521 <__do_global_dtors_aux+0x31>40053f: c6 05 62 04 20 00 01 movb $0x1,2098274(%rip) # 6009a8 <completed.6145>400546: 48 83 c4 08 add $0x8,%rsp40054a: 5b pop %rbx40054b: c9 leaveq 40054c: c3 retq 40054d: 0f 1f 00 nopl (%rax)0000000000400550 <frame_dummy>:400550: 55 push %rbp400551: 48 83 3d 3f 02 20 00 cmpq $0x0,2097727(%rip) # 600798 <__JCR_END__>400558: 00 400559: 48 89 e5 mov %rsp,%rbp40055c: 74 16 je 400574 <frame_dummy+0x24>40055e: b8 00 00 00 00 mov $0x0,%eax400563: 48 85 c0 test %rax,%rax400566: 74 0c je 400574 <frame_dummy+0x24>400568: bf 98 07 60 00 mov $0x600798,%edi40056d: 49 89 c3 mov %rax,%r11400570: c9 leaveq 400571: 41 ff e3 jmpq *%r11400574: c9 leaveq 400575: c3 retq 400576: 90 nop 400577: 90 nop 0000000000400578 <main>:
/*
g++ -g -Wstrict-prototypes -Wall -Wunused -o objtest objtest.c
*/
#include <unistd.h>
int main ( int argc, char * argv[] )400578: 55 push %rbp400579: 48 89 e5 mov %rsp,%rbp40057c: 48 83 ec 10 sub $0x10,%rsp400580: 89 7d fc mov %edi,0xfffffffffffffffc(%rbp)400583: 48 89 75 f0 mov %rsi,0xfffffffffffffff0(%rbp)
{execl( "/bin/sh", "/bin/sh", "-i", 0 );400587: b9 00 00 00 00 mov $0x0,%ecx40058c: ba a8 06 40 00 mov $0x4006a8,%edx400591: be ab 06 40 00 mov $0x4006ab,%esi400596: bf ab 06 40 00 mov $0x4006ab,%edi40059b: b8 00 00 00 00 mov $0x0,%eax4005a0: e8 c3 fe ff ff callq 400468 <execl@plt>return 0;4005a5: b8 00 00 00 00 mov $0x0,%eax
}4005aa: c9 leaveq 4005ab: c3 retq 4005ac: 90 nop 4005ad: 90 nop 4005ae: 90 nop 4005af: 90 nop 00000000004005b0 <__libc_csu_fini>:4005b0: f3 c3 repz retq 4005b2: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)4005b9: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)00000000004005c0 <__libc_csu_init>:4005c0: 4c 89 64 24 e0 mov %r12,0xffffffffffffffe0(%rsp)4005c5: 4c 89 6c 24 e8 mov %r13,0xffffffffffffffe8(%rsp)4005ca: 4c 8d 25 a3 01 20 00 lea 2097571(%rip),%r12 # 600774 <__fini_array_end>4005d1: 4c 89 74 24 f0 mov %r14,0xfffffffffffffff0(%rsp)4005d6: 4c 89 7c 24 f8 mov %r15,0xfffffffffffffff8(%rsp)4005db: 49 89 f6 mov %rsi,%r144005de: 48 89 5c 24 d0 mov %rbx,0xffffffffffffffd0(%rsp)4005e3: 48 89 6c 24 d8 mov %rbp,0xffffffffffffffd8(%rsp)4005e8: 48 83 ec 38 sub $0x38,%rsp4005ec: 41 89 ff mov %edi,%r15d4005ef: 49 89 d5 mov %rdx,%r134005f2: e8 49 fe ff ff callq 400440 <_init>4005f7: 48 8d 05 76 01 20 00 lea 2097526(%rip),%rax # 600774 <__fini_array_end>4005fe: 49 29 c4 sub %rax,%r12400601: 49 c1 fc 03 sar $0x3,%r12400605: 4d 85 e4 test %r12,%r12400608: 74 1e je 400628 <__libc_csu_init+0x68>40060a: 31 ed xor %ebp,%ebp40060c: 48 89 c3 mov %rax,%rbx40060f: 90 nop 400610: 48 83 c5 01 add $0x1,%rbp400614: 4c 89 ea mov %r13,%rdx400617: 4c 89 f6 mov %r14,%rsi40061a: 44 89 ff mov %r15d,%edi40061d: ff 13 callq *(%rbx)40061f: 48 83 c3 08 add $0x8,%rbx400623: 49 39 ec cmp %rbp,%r12400626: 75 e8 jne 400610 <__libc_csu_init+0x50>400628: 48 8b 5c 24 08 mov 0x8(%rsp),%rbx40062d: 48 8b 6c 24 10 mov 0x10(%rsp),%rbp400632: 4c 8b 64 24 18 mov 0x18(%rsp),%r12400637: 4c 8b 6c 24 20 mov 0x20(%rsp),%r1340063c: 4c 8b 74 24 28 mov 0x28(%rsp),%r14400641: 4c 8b 7c 24 30 mov 0x30(%rsp),%r15400646: 48 83 c4 38 add $0x38,%rsp40064a: c3 retq 40064b: 90 nop 40064c: 90 nop 40064d: 90 nop 40064e: 90 nop 40064f: 90 nop 0000000000400650 <__do_global_ctors_aux>:400650: 55 push %rbp400651: 48 89 e5 mov %rsp,%rbp400654: 53 push %rbx400655: bb 78 07 60 00 mov $0x600778,%ebx40065a: 48 83 ec 08 sub $0x8,%rsp40065e: 48 8b 05 13 01 20 00 mov 2097427(%rip),%rax # 600778 <__CTOR_LIST__>400665: 48 83 f8 ff cmp $0xffffffffffffffff,%rax400669: 74 14 je 40067f <__do_global_ctors_aux+0x2f>40066b: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)400670: 48 83 eb 08 sub $0x8,%rbx400674: ff d0 callq *%rax400676: 48 8b 03 mov (%rbx),%rax400679: 48 83 f8 ff cmp $0xffffffffffffffff,%rax40067d: 75 f1 jne 400670 <__do_global_ctors_aux+0x20>40067f: 48 83 c4 08 add $0x8,%rsp400683: 5b pop %rbx400684: c9 leaveq 400685: c3 retq 400686: 90 nop 400687: 90 nop
[root@Betty Cpp]#未设置 -g 参数，并使用了 -O3 参数得到的 obj 文件反汇编后信息量非常少。
[root@Betty Cpp]#
[root@Betty Cpp]# g++ -O3 -o objtest objtest.c
[root@Betty Cpp]#
[root@Betty Cpp]# objdump -j .text -S objtestobjtest: file format elf64-x86-64Disassembly of section .text:00000000004004a0 <_start>:4004a0: 31 ed xor %ebp,%ebp4004a2: 49 89 d1 mov %rdx,%r94004a5: 5e pop %rsi4004a6: 48 89 e2 mov %rsp,%rdx4004a9: 48 83 e4 f0 and $0xfffffffffffffff0,%rsp4004ad: 50 push %rax4004ae: 54 push %rsp4004af: 49 c7 c0 b0 05 40 00 mov $0x4005b0,%r84004b6: 48 c7 c1 c0 05 40 00 mov $0x4005c0,%rcx4004bd: 48 c7 c7 80 05 40 00 mov $0x400580,%rdi4004c4: e8 af ff ff ff callq 400478 <__libc_start_main@plt>4004c9: f4 hlt 4004ca: 90 nop 4004cb: 90 nop 00000000004004cc <call_gmon_start>:4004cc: 48 83 ec 08 sub $0x8,%rsp4004d0: 48 8b 05 81 04 20 00 mov 2098305(%rip),%rax # 600958 <_DYNAMIC+0x1c0>4004d7: 48 85 c0 test %rax,%rax4004da: 74 02 je 4004de <call_gmon_start+0x12>4004dc: ff d0 callq *%rax4004de: 48 83 c4 08 add $0x8,%rsp4004e2: c3 retq 4004e3: 90 nop 4004e4: 90 nop 4004e5: 90 nop 4004e6: 90 nop 4004e7: 90 nop 4004e8: 90 nop 4004e9: 90 nop 4004ea: 90 nop 4004eb: 90 nop 4004ec: 90 nop 4004ed: 90 nop 4004ee: 90 nop 4004ef: 90 nop 00000000004004f0 <__do_global_dtors_aux>:4004f0: 55 push %rbp4004f1: 48 89 e5 mov %rsp,%rbp4004f4: 53 push %rbx4004f5: 48 83 ec 08 sub $0x8,%rsp4004f9: 80 3d a0 04 20 00 00 cmpb $0x0,2098336(%rip) # 6009a0 <completed.6145>400500: 75 44 jne 400546 <__do_global_dtors_aux+0x56>400502: b8 88 07 60 00 mov $0x600788,%eax400507: 48 2d 80 07 60 00 sub $0x600780,%rax40050d: 48 c1 f8 03 sar $0x3,%rax400511: 48 8d 58 ff lea 0xffffffffffffffff(%rax),%rbx400515: 48 8b 05 7c 04 20 00 mov 2098300(%rip),%rax # 600998 <dtor_idx.6147>40051c: 48 39 c3 cmp %rax,%rbx40051f: 76 1e jbe 40053f <__do_global_dtors_aux+0x4f>400521: 48 83 c0 01 add $0x1,%rax400525: 48 89 05 6c 04 20 00 mov %rax,2098284(%rip) # 600998 <dtor_idx.6147>40052c: ff 14 c5 80 07 60 00 callq *0x600780(,%rax,8)400533: 48 8b 05 5e 04 20 00 mov 2098270(%rip),%rax # 600998 <dtor_idx.6147>40053a: 48 39 c3 cmp %rax,%rbx40053d: 77 e2 ja 400521 <__do_global_dtors_aux+0x31>40053f: c6 05 5a 04 20 00 01 movb $0x1,2098266(%rip) # 6009a0 <completed.6145>400546: 48 83 c4 08 add $0x8,%rsp40054a: 5b pop %rbx40054b: c9 leaveq 40054c: c3 retq 40054d: 0f 1f 00 nopl (%rax)0000000000400550 <frame_dummy>:400550: 55 push %rbp400551: 48 83 3d 37 02 20 00 cmpq $0x0,2097719(%rip) # 600790 <__JCR_END__>400558: 00 400559: 48 89 e5 mov %rsp,%rbp40055c: 74 16 je 400574 <frame_dummy+0x24>40055e: b8 00 00 00 00 mov $0x0,%eax400563: 48 85 c0 test %rax,%rax400566: 74 0c je 400574 <frame_dummy+0x24>400568: bf 90 07 60 00 mov $0x600790,%edi40056d: 49 89 c3 mov %rax,%r11400570: c9 leaveq 400571: 41 ff e3 jmpq *%r11400574: c9 leaveq 400575: c3 retq 400576: 90 nop 400577: 90 nop 400578: 90 nop 400579: 90 nop 40057a: 90 nop 40057b: 90 nop 40057c: 90 nop 40057d: 90 nop 40057e: 90 nop 40057f: 90 nop 0000000000400580 <main>:400580: be ab 06 40 00 mov $0x4006ab,%esi400585: 48 83 ec 08 sub $0x8,%rsp400589: 31 c9 xor %ecx,%ecx40058b: ba a8 06 40 00 mov $0x4006a8,%edx400590: 48 89 f7 mov %rsi,%rdi400593: 31 c0 xor %eax,%eax400595: e8 ce fe ff ff callq 400468 <execl@plt>40059a: 31 c0 xor %eax,%eax40059c: 48 83 c4 08 add $0x8,%rsp4005a0: c3 retq 4005a1: 90 nop 4005a2: 90 nop 4005a3: 90 nop 4005a4: 90 nop 4005a5: 90 nop 4005a6: 90 nop 4005a7: 90 nop 4005a8: 90 nop 4005a9: 90 nop 4005aa: 90 nop 4005ab: 90 nop 4005ac: 90 nop 4005ad: 90 nop 4005ae: 90 nop 4005af: 90 nop 00000000004005b0 <__libc_csu_fini>:4005b0: f3 c3 repz retq 4005b2: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)4005b9: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)00000000004005c0 <__libc_csu_init>:4005c0: 4c 89 64 24 e0 mov %r12,0xffffffffffffffe0(%rsp)4005c5: 4c 89 6c 24 e8 mov %r13,0xffffffffffffffe8(%rsp)4005ca: 4c 8d 25 9b 01 20 00 lea 2097563(%rip),%r12 # 60076c <__fini_array_end>4005d1: 4c 89 74 24 f0 mov %r14,0xfffffffffffffff0(%rsp)4005d6: 4c 89 7c 24 f8 mov %r15,0xfffffffffffffff8(%rsp)4005db: 49 89 f6 mov %rsi,%r144005de: 48 89 5c 24 d0 mov %rbx,0xffffffffffffffd0(%rsp)4005e3: 48 89 6c 24 d8 mov %rbp,0xffffffffffffffd8(%rsp)4005e8: 48 83 ec 38 sub $0x38,%rsp4005ec: 41 89 ff mov %edi,%r15d4005ef: 49 89 d5 mov %rdx,%r134005f2: e8 49 fe ff ff callq 400440 <_init>4005f7: 48 8d 05 6e 01 20 00 lea 2097518(%rip),%rax # 60076c <__fini_array_end>4005fe: 49 29 c4 sub %rax,%r12400601: 49 c1 fc 03 sar $0x3,%r12400605: 4d 85 e4 test %r12,%r12400608: 74 1e je 400628 <__libc_csu_init+0x68>40060a: 31 ed xor %ebp,%ebp40060c: 48 89 c3 mov %rax,%rbx40060f: 90 nop 400610: 48 83 c5 01 add $0x1,%rbp400614: 4c 89 ea mov %r13,%rdx400617: 4c 89 f6 mov %r14,%rsi40061a: 44 89 ff mov %r15d,%edi40061d: ff 13 callq *(%rbx)40061f: 48 83 c3 08 add $0x8,%rbx400623: 49 39 ec cmp %rbp,%r12400626: 75 e8 jne 400610 <__libc_csu_init+0x50>400628: 48 8b 5c 24 08 mov 0x8(%rsp),%rbx40062d: 48 8b 6c 24 10 mov 0x10(%rsp),%rbp400632: 4c 8b 64 24 18 mov 0x18(%rsp),%r12400637: 4c 8b 6c 24 20 mov 0x20(%rsp),%r1340063c: 4c 8b 74 24 28 mov 0x28(%rsp),%r14400641: 4c 8b 7c 24 30 mov 0x30(%rsp),%r15400646: 48 83 c4 38 add $0x38,%rsp40064a: c3 retq 40064b: 90 nop 40064c: 90 nop 40064d: 90 nop 40064e: 90 nop 40064f: 90 nop 0000000000400650 <__do_global_ctors_aux>:400650: 55 push %rbp400651: 48 89 e5 mov %rsp,%rbp400654: 53 push %rbx400655: bb 70 07 60 00 mov $0x600770,%ebx40065a: 48 83 ec 08 sub $0x8,%rsp40065e: 48 8b 05 0b 01 20 00 mov 2097419(%rip),%rax # 600770 <__CTOR_LIST__>400665: 48 83 f8 ff cmp $0xffffffffffffffff,%rax400669: 74 14 je 40067f <__do_global_ctors_aux+0x2f>40066b: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)400670: 48 83 eb 08 sub $0x8,%rbx400674: ff d0 callq *%rax400676: 48 8b 03 mov (%rbx),%rax400679: 48 83 f8 ff cmp $0xffffffffffffffff,%rax40067d: 75 f1 jne 400670 <__do_global_ctors_aux+0x20>40067f: 48 83 c4 08 add $0x8,%rsp400683: 5b pop %rbx400684: c9 leaveq 400685: c3 retq 400686: 90 nop 400687: 90 nop
[root@Betty Cpp]#增加 -l 参数没有多出任何有用信息。
[root@Betty Cpp]# objdump -j .text -Sl objtestobjtest: file format elf64-x86-64Disassembly of section .text:00000000004004a0 <_start>:
_start():4004a0: 31 ed xor %ebp,%ebp4004a2: 49 89 d1 mov %rdx,%r94004a5: 5e pop %rsi4004a6: 48 89 e2 mov %rsp,%rdx4004a9: 48 83 e4 f0 and $0xfffffffffffffff0,%rsp4004ad: 50 push %rax4004ae: 54 push %rsp4004af: 49 c7 c0 b0 05 40 00 mov $0x4005b0,%r84004b6: 48 c7 c1 c0 05 40 00 mov $0x4005c0,%rcx4004bd: 48 c7 c7 80 05 40 00 mov $0x400580,%rdi4004c4: e8 af ff ff ff callq 400478 <__libc_start_main@plt>4004c9: f4 hlt 4004ca: 90 nop 4004cb: 90 nop 00000000004004cc <call_gmon_start>:
call_gmon_start():4004cc: 48 83 ec 08 sub $0x8,%rsp4004d0: 48 8b 05 81 04 20 00 mov 2098305(%rip),%rax # 600958 <_DYNAMIC+0x1c0>4004d7: 48 85 c0 test %rax,%rax4004da: 74 02 je 4004de <call_gmon_start+0x12>4004dc: ff d0 callq *%rax4004de: 48 83 c4 08 add $0x8,%rsp4004e2: c3 retq 4004e3: 90 nop 4004e4: 90 nop 4004e5: 90 nop 4004e6: 90 nop 4004e7: 90 nop 4004e8: 90 nop 4004e9: 90 nop 4004ea: 90 nop 4004eb: 90 nop 4004ec: 90 nop 4004ed: 90 nop 4004ee: 90 nop 4004ef: 90 nop 00000000004004f0 <__do_global_dtors_aux>:
__do_global_dtors_aux():4004f0: 55 push %rbp4004f1: 48 89 e5 mov %rsp,%rbp4004f4: 53 push %rbx4004f5: 48 83 ec 08 sub $0x8,%rsp4004f9: 80 3d a0 04 20 00 00 cmpb $0x0,2098336(%rip) # 6009a0 <completed.6145>400500: 75 44 jne 400546 <__do_global_dtors_aux+0x56>400502: b8 88 07 60 00 mov $0x600788,%eax400507: 48 2d 80 07 60 00 sub $0x600780,%rax40050d: 48 c1 f8 03 sar $0x3,%rax400511: 48 8d 58 ff lea 0xffffffffffffffff(%rax),%rbx400515: 48 8b 05 7c 04 20 00 mov 2098300(%rip),%rax # 600998 <dtor_idx.6147>40051c: 48 39 c3 cmp %rax,%rbx40051f: 76 1e jbe 40053f <__do_global_dtors_aux+0x4f>400521: 48 83 c0 01 add $0x1,%rax400525: 48 89 05 6c 04 20 00 mov %rax,2098284(%rip) # 600998 <dtor_idx.6147>40052c: ff 14 c5 80 07 60 00 callq *0x600780(,%rax,8)400533: 48 8b 05 5e 04 20 00 mov 2098270(%rip),%rax # 600998 <dtor_idx.6147>40053a: 48 39 c3 cmp %rax,%rbx40053d: 77 e2 ja 400521 <__do_global_dtors_aux+0x31>40053f: c6 05 5a 04 20 00 01 movb $0x1,2098266(%rip) # 6009a0 <completed.6145>400546: 48 83 c4 08 add $0x8,%rsp40054a: 5b pop %rbx40054b: c9 leaveq 40054c: c3 retq 40054d: 0f 1f 00 nopl (%rax)0000000000400550 <frame_dummy>:
frame_dummy():400550: 55 push %rbp400551: 48 83 3d 37 02 20 00 cmpq $0x0,2097719(%rip) # 600790 <__JCR_END__>400558: 00 400559: 48 89 e5 mov %rsp,%rbp40055c: 74 16 je 400574 <frame_dummy+0x24>40055e: b8 00 00 00 00 mov $0x0,%eax400563: 48 85 c0 test %rax,%rax400566: 74 0c je 400574 <frame_dummy+0x24>400568: bf 90 07 60 00 mov $0x600790,%edi40056d: 49 89 c3 mov %rax,%r11400570: c9 leaveq 400571: 41 ff e3 jmpq *%r11400574: c9 leaveq 400575: c3 retq 400576: 90 nop 400577: 90 nop 400578: 90 nop 400579: 90 nop 40057a: 90 nop 40057b: 90 nop 40057c: 90 nop 40057d: 90 nop 40057e: 90 nop 40057f: 90 nop 0000000000400580 <main>:
main():400580: be ab 06 40 00 mov $0x4006ab,%esi400585: 48 83 ec 08 sub $0x8,%rsp400589: 31 c9 xor %ecx,%ecx40058b: ba a8 06 40 00 mov $0x4006a8,%edx400590: 48 89 f7 mov %rsi,%rdi400593: 31 c0 xor %eax,%eax400595: e8 ce fe ff ff callq 400468 <execl@plt>40059a: 31 c0 xor %eax,%eax40059c: 48 83 c4 08 add $0x8,%rsp4005a0: c3 retq 4005a1: 90 nop 4005a2: 90 nop 4005a3: 90 nop 4005a4: 90 nop 4005a5: 90 nop 4005a6: 90 nop 4005a7: 90 nop 4005a8: 90 nop 4005a9: 90 nop 4005aa: 90 nop 4005ab: 90 nop 4005ac: 90 nop 4005ad: 90 nop 4005ae: 90 nop 4005af: 90 nop 00000000004005b0 <__libc_csu_fini>:
__libc_csu_fini():4005b0: f3 c3 repz retq 4005b2: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)4005b9: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)00000000004005c0 <__libc_csu_init>:
__libc_csu_init():4005c0: 4c 89 64 24 e0 mov %r12,0xffffffffffffffe0(%rsp)4005c5: 4c 89 6c 24 e8 mov %r13,0xffffffffffffffe8(%rsp)4005ca: 4c 8d 25 9b 01 20 00 lea 2097563(%rip),%r12 # 60076c <__fini_array_end>4005d1: 4c 89 74 24 f0 mov %r14,0xfffffffffffffff0(%rsp)4005d6: 4c 89 7c 24 f8 mov %r15,0xfffffffffffffff8(%rsp)4005db: 49 89 f6 mov %rsi,%r144005de: 48 89 5c 24 d0 mov %rbx,0xffffffffffffffd0(%rsp)4005e3: 48 89 6c 24 d8 mov %rbp,0xffffffffffffffd8(%rsp)4005e8: 48 83 ec 38 sub $0x38,%rsp4005ec: 41 89 ff mov %edi,%r15d4005ef: 49 89 d5 mov %rdx,%r134005f2: e8 49 fe ff ff callq 400440 <_init>4005f7: 48 8d 05 6e 01 20 00 lea 2097518(%rip),%rax # 60076c <__fini_array_end>4005fe: 49 29 c4 sub %rax,%r12400601: 49 c1 fc 03 sar $0x3,%r12400605: 4d 85 e4 test %r12,%r12400608: 74 1e je 400628 <__libc_csu_init+0x68>40060a: 31 ed xor %ebp,%ebp40060c: 48 89 c3 mov %rax,%rbx40060f: 90 nop 400610: 48 83 c5 01 add $0x1,%rbp400614: 4c 89 ea mov %r13,%rdx400617: 4c 89 f6 mov %r14,%rsi40061a: 44 89 ff mov %r15d,%edi40061d: ff 13 callq *(%rbx)40061f: 48 83 c3 08 add $0x8,%rbx400623: 49 39 ec cmp %rbp,%r12400626: 75 e8 jne 400610 <__libc_csu_init+0x50>400628: 48 8b 5c 24 08 mov 0x8(%rsp),%rbx40062d: 48 8b 6c 24 10 mov 0x10(%rsp),%rbp400632: 4c 8b 64 24 18 mov 0x18(%rsp),%r12400637: 4c 8b 6c 24 20 mov 0x20(%rsp),%r1340063c: 4c 8b 74 24 28 mov 0x28(%rsp),%r14400641: 4c 8b 7c 24 30 mov 0x30(%rsp),%r15400646: 48 83 c4 38 add $0x38,%rsp40064a: c3 retq 40064b: 90 nop 40064c: 90 nop 40064d: 90 nop 40064e: 90 nop 40064f: 90 nop 0000000000400650 <__do_global_ctors_aux>:
__do_global_ctors_aux():400650: 55 push %rbp400651: 48 89 e5 mov %rsp,%rbp400654: 53 push %rbx400655: bb 70 07 60 00 mov $0x600770,%ebx40065a: 48 83 ec 08 sub $0x8,%rsp40065e: 48 8b 05 0b 01 20 00 mov 2097419(%rip),%rax # 600770 <__CTOR_LIST__>400665: 48 83 f8 ff cmp $0xffffffffffffffff,%rax400669: 74 14 je 40067f <__do_global_ctors_aux+0x2f>40066b: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)400670: 48 83 eb 08 sub $0x8,%rbx400674: ff d0 callq *%rax400676: 48 8b 03 mov (%rbx),%rax400679: 48 83 f8 ff cmp $0xffffffffffffffff,%rax40067d: 75 f1 jne 400670 <__do_global_ctors_aux+0x20>40067f: 48 83 c4 08 add $0x8,%rsp400683: 5b pop %rbx400684: c9 leaveq 400685: c3 retq 400686: 90 nop 400687: 90 nop
[root@Betty Cpp]#最后，附加几张反汇编内容的对比图片。
转载于:https://my.oschina.net/moooofly/blog/150125
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