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[Bug binutils/28158] New: nm --dynamic and readelf --dyn-syms vs. copy r
From: |
amodra at gmail dot com |
Subject: |
[Bug binutils/28158] New: nm --dynamic and readelf --dyn-syms vs. copy reloc symbols |
Date: |
Sun, 01 Aug 2021 02:12:16 +0000 |
https://sourceware.org/bugzilla/show_bug.cgi?id=28158
Bug ID: 28158
Summary: nm --dynamic and readelf --dyn-syms vs. copy reloc
symbols
Product: binutils
Version: 2.38 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: amodra at gmail dot com
Target Milestone: ---
The following testcase gives readelf --dyn-syms output on x86_64-linux of
Symbol table '.dynsym' contains 2 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
1: 0000000000403000 8 NOTYPE GLOBAL DEFAULT 13 foo@VER (2)
vs. nm --dynamic output of
0000000000403000 B foo@@VER
Notice the disagreement in number of '@'s shown.
cat > prxxxxxa.s <<\EOF
.text
.dc.a foo
EOF
cat > prxxxxxb.s <<\EOF
.data
.globl foo
foo: .dc.a foo
.size foo, .-foo
EOF
cat > prxxxxx.ver <<\EOF
VER { global: foo; local: *; };
EOF
gas/as-new -o prxxxxxa.o prxxxxxa.s
gas/as-new -o prxxxxxb.o prxxxxxb.s
ld/ld-new -shared -o prxxxxx.so prxxxxxb.o --version-script prxxxxx.ver
ld/ld-new -o prxxxxx prxxxxxa.o prxxxxx.so
binutils/readelf --dyn-syms prxxxxx
binutils/nm-new --dynamic prxxxxx
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