This manual is for program, version version.
| • binutils: |
GNU Binary Utilities http://sourceware.org/binutils/docs/binutils/
Table of Contents
Introduction 1 ar 1.1 Controlling ar on the Command Line 1.2 Controlling ar with a Script 2 nm 3 objcopy 4 objdump 5 ranlib 6 size 7 strings 8 strip 9 c++filt 10 addr2line 11 nlmconv 12 windmc 13 windres 14 dlltool 14.1 The format of the dlltool .def file 15 readelf 16 elfedit 17 Common Options 18 Selecting the Target System 18.1 Target Selection 18.2 Architecture Selection 19 Reporting Bugs 19.1 Have You Found a Bug? 19.2 How to Report Bugs Appendix A GNU Free Documentation License Binutils Index Next: ar, Up: (dir)
Introduction
This brief manual contains documentation for the gnu binary utilities (GNU Binutils) version 2.26:
This document is distributed under the terms of the GNU Free Documentation License version 1.3. A copy of the license is included in the section entitled “GNU Free Documentation License”.
ar: Create, modify, and extract from archives nm: List symbols from object files objcopy: Copy and translate object files objdump: Display information from object files ranlib: Generate index to archive contents size: List section sizes and total size strings: List printable strings from files strip: Discard symbols c++filt: Filter to demangle encoded C++ symbols cxxfilt: MS-DOS name for c++filt addr2line: Convert addresses to file and line nlmconv: Converts object code into an NLM windmc: Generator for Windows message resources windres: Manipulate Windows resources dlltool: Create files needed to build and use DLLs readelf: Display the contents of ELF format files elfedit: Update the ELF header of ELF files Common Options: Command-line options for all utilities Selecting the Target System: How these utilities determine the target Reporting Bugs: Reporting Bugs GNU Free Documentation License: GNU Free Documentation License Binutils Index: Binutils Index —————–
addr2line arm-eabi-addr2line -C -f -e xxx.so [addr] example: addr2line -Cfe vmlinux 0xffffffc0006e49b8 0xffffffc00016498c 0xffffffc0001678f0 0xffffffc0000bf434 0xffffffc000084410 -a –addresses Display address before function names or file and line number information. The address is printed with a 0x prefix to easily identify it. -b bfdname –target=bfdname Specify that the object-code format for the object files is bfdname. -C –demangle[=style] Decode (demangle) low-level symbol names into user-level names. Besides removing any initial underscore prepended by the system, this makes C++ function names readable. Different compilers have different mangling styles. The optional demangling style argument can be used to choose an appropriate demangling style for your compiler. -e filename –exe=filename Specify the name of the executable for which addresses should be translated. The default file is a.out. -f –functions Display function names as well as file and line number information. -s –basenames Display only the base of each file name. -i –inlines If the address belongs to a function that was inlined, the source information for all enclosing scopes back to the first non-inlined function will also be printed. For example, if "main" inlines "callee1" which inlines "callee2", and address is from "callee2", the source information for "callee1" and "main" will also be printed. -j –section Read offsets relative to the specified section instead of absolute addresses. -p –pretty-print Make the output more human friendly: each location are printed on one line. If option -i is specified, lines for all enclosing scopes are prefixed with (inlined by). @file Read command-line options from file. The options read are inserted in place of the original @file option. If file does not exist, or cannot be read, then the option will be treated literally, and not removed. Options in file are separated by whitespace. A whitespace character may be included in an option by surrounding the entire option in either single or double quotes. Any character (including a backslash) may be included by prefixing the character to be included with a backslash. The file may itself contain additional @file options; any such options will be processed recursively.
nm #01 pc 00086be3 /system/lib/libandroid_runtime.so (android::javaObjectForIBinder(_JNIEnv*, android: p<android::IBinder> const&)+30) $arm-eabi-nm -A libandroid_runtime.so | grep "00086b" U An undefined symbol, usually an external symbol reference. T A symbol defined in the text section, usually a function name. t A local symbol defined in the text section. In a C program, this usu-ally equates to a static function. D An initialized data value. C An uninitialized data value. http://www.thegeekstuff.com/2012/03/linux-nm-command/ http://www.cnblogs.com/yc_sunniwell/archive/2010/07/22/1782685.html
ldd (list dynamic dependencies) utility is a simple tool used to list the dynamic libraries required by any executable.
c++filt It is possible to recover the demangled function names nm cpp_test | grep demo | c++filt
strings The strings utility is designed specifically to extract string content from files, often without regard for the format of those files.
dump symbol file arm-eabi-objdump -t vmlinux > sym.txt arm-eabi-readelf -s vmlinux > sym.txt crash > sym -l
disassembly arm-eabi-objdump -S -D -l vmlinux > vmlinux.S
arm-eabi-readelf -a vmlinux | grep "page_address" 0xc0257d54 <page_address>: 0x80acb0b0 0xc0257f78 <set_page_address>: @0xc0ddec58 0xc0e15528 <page_address_init>: 0x80aab0b0 35061: c0d8900a 13 OBJECT LOCAL DEFAULT 9 __kstrtab_page_address 35069: c0d7e28c 4 OBJECT LOCAL DEFAULT 7 __kcrctab_page_address 35086: c10fe3c0 8192 OBJECT LOCAL DEFAULT 26 page_address_htable 35088: c1100bc0 8 OBJECT LOCAL DEFAULT 26 page_address_pool 35091: c1100be0 8192 OBJECT LOCAL DEFAULT 26 page_address_maps 35098: c0d736a0 8 OBJECT LOCAL DEFAULT 5 __ksymtab_page_address 173448: c0257f78 348 FUNC GLOBAL DEFAULT 2 set_page_address 177039: c0257d54 212 FUNC GLOBAL DEFAULT 2 page_address 177102: c0261530 156 FUNC GLOBAL DEFAULT 2 page_address_in_vma 184422: c0e15528 160 FUNC GLOBAL DEFAULT 17 page_address_init 186568: 865b8f4f 0 NOTYPE GLOBAL DEFAULT ABS __crc_page_address
arm-eabi-objdump -S -D -l -d –start-address=0xc0257d54 –stop-address=0xc0257e28 vmlinux
reference https://www.gnu.org/software/binutils/ https://sourceware.org/binutils/docs-2.25/binutils/index.html http://blog.csdn.net/andyhuabing/article/details/7074979 http://bytesthink.com/blog/?p=133 http://blog.csdn.net/helldevil/article/details/6682211 http://bootloader.wikidot.com/linux:android:crashlog http://www.fanli7.net/a/bianchengyuyan/C__/20120511/121926.html http://www.thegeekstuff.com/2012/03/linux-nm-command/ http://www.cnblogs.com/yc_sunniwell/archive/2010/07/22/1782685.html