https://sourceware.org/bugzilla/show_bug.cgi?id=25227
Bug ID: 25227
Summary: "eu-nm --extern" skips first symbol
Product: elfutils
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: general
Assignee: unassigned at sourceware dot org
Reporter: ematsumiya at suse dot com
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
Reproduction steps:
> # cat example.c
> void *SYM1;
> void *SYM2;
> void *SYM3;
> # gcc -c -std=gnu89 -fstack-protector-all -funsigned-char -fPIC -Wall
> -Wconversion -Wextra -g -O0 example.c
> # eu-nm --extern example.o
>
>
> Symbols from /home/enzo/tmp/eu-nm-bug/example.o:
>
> Name Value Class Type Size Line Section
>
> SYM2|0000000000000008|GLOBAL|OBJECT |0000000000000008| |COMMON
> SYM3|0000000000000008|GLOBAL|OBJECT |0000000000000008| |COMMON
Expected result:
> Name Value Class Type Size Line Section
>
> SYM1|0000000000000008|GLOBAL|OBJECT |0000000000000008| |COMMON
> SYM2|0000000000000008|GLOBAL|OBJECT |0000000000000008| |COMMON
> SYM3|0000000000000008|GLOBAL|OBJECT |0000000000000008| |COMMON
i.e. "SYM1" line is not present.
Reverting this change fixes the problem:
commit 66f4c37d497bdde040a33f299b12163f044b1bf2
Author: Ulrich Drepper <drep...@gmail.com>
Date: Mon Oct 3 15:53:12 2011 -0400
Fix nm output for sysv format
Undefined symbols need no address and siz printed. Avoid the initial
entry which is no real symbol. Avoid section symbols.
@@ -808,8 +808,12 @@ show_symbols_sysv (Ebl *ebl, GElf_Word strndx, const char
*fullname,
#endif
/* Iterate over all symbols. */
- for (cnt = 0; cnt < nsyms; ++cnt)
+ for (cnt = 1; cnt < nsyms; ++cnt)
--
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