uboot-2011.12 ported to S3C2440 (Sequence 2) - binutils binary tool set and u-boot

Overview

binutils is a set of binary tools, including addr2line, ar, gprof, nm, objcopy, objdumpr, ranlib, size, strings, strip, etc.

ar software

ar is used to create, modify, and extract library files. ar requires at least two parameters to run, for example:

$ ar rv libtest.a add.o minus.o

It means to make add.o and minus.o into the library file libtest.a. Among them, r means to insert the file list into the archive file, and v means to get the operation version number.

So when we reference the library file, we can use:

$ gcc -o test test.c -ltest

nm Software

The role of nm software is to display the information and properties of the target file, such as:

$ nm test.o

         U Add

00000000 T main

         U Minus

         U printf

Here U indicates that the symbol is undefined, T indicates that the symbol is located in the code segment, D indicates that the symbol is located in the initialized data section, and there are also B, t, r, b, R, A, W, d, and so on.

objcopy software

The objcopy software is used to convert target software in one format into target software in another format.

For example, u-boot uses this software to convert u-boot into u-boot.srec format.

objdump software

This software can be used to disassemble and view target file information.

ld software

The ld software is used to link various target files and library files together, locate the addresses of data and functions, and finally generate executable files.

Linker description file:

The linker script file is used to explicitly control the linking process of ld. The "-T" option of ld can specify the name of the linker script file.

The linker script follows the syntax of a specific linker command language, linker scripts. For example, u-boot.lds