目录
1、toolchains版本的介绍
在linaro官网有众多toolchains的版本，目前比较常用的是4.9-2016.02
Parent Directory
folder 4.9-2016.02 -
folder 4.9-2017.01 -
folder 5.1-2015.08 -
folder 5.2-2015.11 -
folder 5.2-2015.11-1 -
folder 5.2-2015.11-2 -
folder 5.3-2016.02 -
folder 5.3-2016.05 -
folder 5.4-2017.01 -
folder 5.4-2017.05 -
folder 5.5-2017.10 -
folder 6.1-2016.08 -
folder 6.2-2016.11 -
folder 6.3-2017.02 -
folder 6.3-2017.05 -
folder 6.4-2017.08 -
folder 6.4-2017.11 -
folder 6.4-2018.05 -
folder 6.5-2018.12 -
folder 7.1-2017.05 -
folder 7.1-2017.08 -
folder 7.2-2017.11 -
folder 7.3-2018.05 -
folder 7.4-2019.02 -
folder 7.5-2019.12
比如我们选择4.9-2016.02这个版本查看
https://releases.linaro.org/components/toolchain/binaries/4.9-2016.02/
arm开头的是arm32使用的，aarch64开头的是arm64使用的，带hf的是支持浮点型的
-
aarch64-linux-gnu
-
arm-linux-gnueabi
-
arm-linux-gnueabihf
2、toolchains中的命令介绍
toolchains支持众多命令，列举如下:
gcc-linaro-4.9-2015.02-3-x86_64_aarch64-linux-gnu/bin$ ls
aarch64-linux-gnu-addr2line aarch64-linux-gnu-cpp aarch64-linux-gnu-gcc-ar
aarch64-linux-gnu-gfortran aarch64-linux-gnu-objcopy aarch64-linux-gnu-strings
aarch64-linux-gnu-ar aarch64-linux-gnu-elfedit aarch64-linux-gnu-gcc-nm
aarch64-linux-gnu-gprof aarch64-linux-gnu-objdump aarch64-linux-gnu-strip
aarch64-linux-gnu-as aarch64-linux-gnu-g++ aarch64-linux-gnu-gcc-ranlib
aarch64-linux-gnu-ld aarch64-linux-gnu-ranlib gdbserver
aarch64-linux-gnu-c++ aarch64-linux-gnu-gcc aarch64-linux-gnu-gcov
aarch64-linux-gnu-ld.bfd aarch64-linux-gnu-readelf runtest
aarch64-linux-gnu-c++filt aarch64-linux-gnu-gcc-4.9.3 aarch64-linux-gnu-gdb
aarch64-linux-gnu-nm aarch64-linux-gnu-size
部分命令介绍：
- aarch64-linux-gnu-gcc 这就是交叉编译器，将源文件编译成elf可执行文件
- aarch64-linux-gnu-strip 删除elf中的符号表，生成干净的可执行文件
- aarch64-linux-gnu-objdump 将elf文件反汇编，输出dump文件
3、objdump的详细使用
查看help信息
bin$ ./aarch64-linux-gnu-objdump
Usage: ./aarch64-linux-gnu-objdump <option(s)> <file(s)>
Display information from object <file(s)>.
At least one of the following switches must be given:
-a, --archive-headers Display archive header information
-f, --file-headers Display the contents of the overall file header
-p, --private-headers Display object format specific file header contents
-P, --private=OPT,OPT... Display object format specific contents
-h, --[section-]headers Display the contents of the section headers
-x, --all-headers Display the contents of all headers
-d, --disassemble Display assembler contents of executable sections
-D, --disassemble-all Display assembler contents of all sections
-S, --source Intermix source code with disassembly
-s, --full-contents Display the full contents of all sections requested
-g, --debugging Display debug information in object file
-e, --debugging-tags Display debug information using ctags style
-G, --stabs Display (in raw form) any STABS info in the file
-W[lLiaprmfFsoRt] or
--dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,
=frames-interp,=str,=loc,=Ranges,=pubtypes,
=gdb_index,=trace_info,=trace_abbrev,=trace_aranges,
=addr,=cu_index]
Display DWARF info in the file
-t, --syms Display the contents of the symbol table(s)
-T, --dynamic-syms Display the contents of the dynamic symbol table
-r, --reloc Display the relocation entries in the file
-R, --dynamic-reloc Display the dynamic relocation entries in the file
@<file> Read options from <file>
-v, --version Display this program's version number
-i, --info List object formats and architectures supported
-H, --help Display this information