有没有办法重命名由 gcc 编译的 .o 或 .a 文件中的节名称？

Question

I have a precompiled library compiled with a gcc-based compiler and I would like to move the functions from the default .text section to some other section name (let's say foo ). Is there a way to do this using binutils without recompiling?

Answer 1

.a library or static library is nothing but collection of object files only.

So before linking you can use objcpy rename command to change name of your sections. Similarly you can change symbol name also using " -redefine-sym"

--rename-section oldname=newname[,flags] Rename a section from oldname to newname, optionally changing the section's flags to flags in the process. This has the advantage over using a linker script to perform the rename in that the output stays as an object file and does not become a linked executable. Example:-

                 objcopy -I binary -O <output_format> -B <architecture> \
                  --rename-section .data=.rodata,alloc,load,readonly,data,contents \
                  <input_binary_file> <output_object_file>

Refer: http://man7.org/linux/man-pages/man1/objcopy.1.html

Answer 2

Linker Script

You can also us ld to rename sections using a linker script.

ld -r -T section_rename.xsc -o output.o input.o

Where the section_rename.xsc might look similar to the following:

SECTIONS
{
  .newtext : { *(.text) }
  .newdata : { *(.data) }
}