On 12/19/2017 08:53 AM, Nancy wrote:
.rela.X is a relocation section generated by the assembler. GCC emits debug
information using assembler pseudos such as .word etc. Those will name
relocations. The syntax for relocations is target-specific. The above will
be some_symbol@dtpoff or something.
Sorry, I did not find it in "AS". I did saw .text .data .bss and some
other new segment created by "AS" through function "subseg_new", but I
could not find out where and how ".rela.debug_info" is generated. For
this case, "as" dwarf2dbg.c(binutils-2.29.1): 1932
if(emit_other_sections) does not run (emit_other_section==0).
My understand, all .debug_XXX is generated by GCC, "AS" just copy them
to obj, not a bit change. But I also could not find ".rela.X" in GCC.
That is correct. GCC emits an ascii text representation that the
assembler converts to a binary ELF representation. ELF represents a
what one thinks of as a single section as two sections. One with the
regular name given it -- '.debug_info' or whatever. This holds the
binary image of that section. The other section is named '.rela<NAME>'
(or .rel<NAME>' depending on the target ABI) to hold the relocation
data. This is handled by the assembler & BFD.
It's not clear to my why you want this level of detail -- curiosity?
http://www.sco.com/developers/gabi/latest/contents.html
https://software.intel.com/sites/default/files/article/402129/mpx-linux64-abi.pdf
nathan
--
Nathan Sidwell
