Subject: [PATCH] readelf: Update dynamic tag processing and validate section info

[H.J. Lu]

Count DT_RELR relocations using dynamic tags when section header isn't
used.  Ignore section sh_offset and sh_size if they are larger than file
size.

One side effect is that we now display

readelf: Warning: Ignore the out of range sh_offset value of
2199023261148 for section 17
readelf: Warning: Ignore the out of range sh_size value of 13 for
section 17 with sh_offset value of 2199023261148
...
  [17] .fini             PROGBITS        00000000000015dc 000000
000000 00  AX  0   0  4
...

instead of

...
  [17] .fini             PROGBITS        00000000000015dc 200000015dc
00000d 00  AX  0   0  4
...

and segfault.

binutils/

PR binutils/34326
PR binutils/34339
* readelf.c (update_all_relocations): Skip if nentries == 0.
(validate_section_info): New.
(get_32bit_section_headers): Call validate_section_info.
(get_64bit_section_headers): Likewise.
(process_relocs): Call count_relr_relocations if needed.  Check
invalid invalid DT_RELENT and DT_RELAENT dynamic tags.
(process_got_section_contents): Skip if all_relocations_count
== 0.

ld/
PR binutils/34339
* testsuite/ld-x86-64/binutils.exp: Run PR binutils/34339 tests.
* testsuite/ld-x86-64/got-2.s: New file.
* testsuite/ld-x86-64/libgot-2.rd: Likewise.


-- 
H.J.
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