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ELFkickers是一组elf工具

rebind is a small utility that allows one to modify the binding
strength of an exported symbol in an ELF object file.

There are two different types of global symbol bindings. The first is
STB_GLOBAL. A global symbol can appear in multiple ELF files, but it
must be an undefined reference in all but one place. The second type
of binding is STB_WEAK. A weak symbol acts identically to a global
symbol only as long as there exists no global symbol with the same
name. If there is, however, then the weak symbol is ignored in favor
of the global symbol, and the condition is not treated as a name
collision error.

The GNU C compiler permits the user to make a global function or
variable weak via the __attribute__ extension. The GNU assembler uses
the .weak directive to accomplish the same thing. Most other tools
offer no way to export a weak symbol instead of a global one, so this
program can be seen as providing an alternate method for doing this.
This program can also be used to directly see how changing a symbol's
binding can affect the linking stage. And, hopefully, it also provides
a template for writing other specialized programs for making minor,
in-place modifications to ELF files.