build-id - Example code for reading an ELF binary's .note.gnu.build-id section, from the program itself

Age	Commit message (Collapse)	Author
2017-11-24	Add build_id_find_nhdr_by_symbol()	Matt Turner

2017-11-24	Add "by_name" to function name	Matt Turner
	In preparation for adding a "by_symbol" equivalent.
2017-11-24	Simplify code structure to match upstream Mesa	Matt Turner

2017-11-24	Rename "note" to "build_id_note" to avoid potential collisions	Matt Turner

2017-11-24	Change API to match upstream Mesa	Matt Turner

2017-11-24	Add .gitignore	Matt Turner

2017-02-14	Remove unused headers.	Matt Turner

2016-12-14	Use dl_iterate_phdr() instead of a linker script.	Matt Turner
	According to Mike Frysinger [1] it is not reliable to read ELF sections at runtime, which the previous method involving the linker script was doing. Instead, use dl_iterate_phdr() to find the build id. [1] https://sourceware.org/ml/binutils/2016-12/msg00207.html
2016-12-08	Make the linker script work.	Matt Turner
	Previously the build-id program (which was reading its own build-id worked) but the so-build-id program (was was reading the linked DSO's build id) did not. I speculated that the __note_gnu_build_id_start symbol was not being relocated properly since its address in the DSO was somewhat before the .text section, while the __note_gnu_build_id_end symbol was correct. I could even read the build-id which ended at the end symbol. I noticed that in the output of "ld --verbose" that there is only a ".interp" section immediately before .note.gnu.build-id, while in "ld --verbose -shared" there is nothing before .note.gnu.build-id. I think that probably points to the problem, but I am not sure exactly what it is.
2016-12-08	Initial commit	Matt Turner