[Bug binutils/26087] New: objdump --reloc does not work

[martin at dev2day dot de]

https://sourceware.org/bugzilla/show_bug.cgi?id=26087

            Bug ID: 26087
           Summary: objdump --reloc does not work
           Product: binutils
           Version: 2.34
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: martin at dev2day dot de
  Target Milestone: ---

Created attachment 12594
  --> https://sourceware.org/bugzilla/attachment.cgi?id=12594&action=edit
file that I used to run objdump and readelf as described in the Description
field

Hello!

When running obdjump on the attached file I get the following (empty) output:

$ objdump --reloc relocoverwrite

relocoverwrite:     file format elf64-x86-64

When I run readelf I get the following output:

$ readelf --relocs relocoverwrite

Relocation section '.rela.dyn' at offset 0x5c0 contains 11 entries:
  Offset          Info           Type           Sym. Value    Sym. Name +
Addend
000000003de0  000000000008 R_X86_64_RELATIVE                    1240
000000003de8  000000000008 R_X86_64_RELATIVE                    11f0
000000004048  000000000008 R_X86_64_RELATIVE                    4048
000000003fd0  000100000006 R_X86_64_GLOB_DAT 0000000000000000
_ITM_deregisterTMClone + 0
000000003fd8  000d00000006 R_X86_64_GLOB_DAT 0000000000000000
printf@GLIBC_2.2.5 + 0
000000003fe0  000500000006 R_X86_64_GLOB_DAT 0000000000000000
__libc_start_main@GLIBC_2.2.5 + 0
000000003fe8  000600000006 R_X86_64_GLOB_DAT 0000000000000000 __gmon_start__ +
0
000000003ff0  000900000006 R_X86_64_GLOB_DAT 0000000000000000
_ITM_registerTMCloneTa + 0
000000003ff8  000a00000006 R_X86_64_GLOB_DAT 0000000000000000
__cxa_finalize@GLIBC_2.2.5 + 0
000000004050  000b00000005 R_X86_64_COPY     0000000000004050
stdout@GLIBC_2.2.5 + 0
000000004060  000c00000005 R_X86_64_COPY     0000000000004060 stdin@GLIBC_2.2.5
+ 0

Relocation section '.rela.plt' at offset 0x6c8 contains 5 entries:
  Offset          Info           Type           Sym. Value    Sym. Name +
Addend
000000004018  000200000007 R_X86_64_JUMP_SLO 0000000000000000 puts@GLIBC_2.2.5
+ 0
000000004020  000300000007 R_X86_64_JUMP_SLO 0000000000000000
__stack_chk_fail@GLIBC_2.4 + 0
000000004028  000400000007 R_X86_64_JUMP_SLO 0000000000000000 read@GLIBC_2.2.5
+ 0
000000004030  000700000007 R_X86_64_JUMP_SLO 0000000000000000
setvbuf@GLIBC_2.2.5 + 0
000000004038  000800000007 R_X86_64_JUMP_SLO 0000000000000000
__isoc99_scanf@GLIBC_2.7 + 0

It seems that objdump is not able to read the relocation entries.

I tested this on Ubuntu 20.04 and Fedora 32. Same behavior.

Best
Martin

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