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<body><span class="vcard"><a class="email" href="mailto:i@maskray.me" title="Fangrui Song <i@maskray.me>"> <span class="fn">Fangrui Song</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WORKSFORME - lld unable to link compiler-rt on aarch64 (hwasan)"
href="https://bugs.llvm.org/show_bug.cgi?id=35929">bug 35929</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>i@maskray.me
</td>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>WORKSFORME
</td>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>CONFIRMED
</td>
<td>RESOLVED
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WORKSFORME - lld unable to link compiler-rt on aarch64 (hwasan)"
href="https://bugs.llvm.org/show_bug.cgi?id=35929#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WORKSFORME - lld unable to link compiler-rt on aarch64 (hwasan)"
href="https://bugs.llvm.org/show_bug.cgi?id=35929">bug 35929</a>
from <span class="vcard"><a class="email" href="mailto:i@maskray.me" title="Fangrui Song <i@maskray.me>"> <span class="fn">Fangrui Song</span></a>
</span></b>
<pre><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - hwasan does not link with lld due to pc-relative relocations to .text"
href="show_bug.cgi?id=35931">https://bugs.llvm.org/show_bug.cgi?id=35931</a> has been fixed.
With -shared,
neither ld.bfd nor gold allows R_X86_64_PC32 (not link-time constant, not
dynamic relocation) against the preemptable symbol 'func'. So is it obsoleted?
x86_64:
% clang -fuse-ld=bfd a.c --shared -fPIE -ffunction-sections -Wl,-znotext
/usr/bin/ld.bfd: /tmp/a-ce6897.o: relocation R_X86_64_PC32 against symbol
`func' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld.bfd: final link failed: Bad value
clang-9: error: linker command failed with exit code 1 (use -v to see
invocation)
aarch64:
% ld.lld -shared a.o -o a
ld.lld: error: relocation R_AARCH64_ADR_PREL_PG_HI21 cannot be used against
symbol func; recompile with -fPIC
<span class="quote">>>> defined in a.o
>>> referenced by a.c
>>> a.o:(func2)</span >
ld.lld: error: can't create dynamic relocation R_AARCH64_ADD_ABS_LO12_NC
against symbol: func in readonly segment; recompile object files with -fPIC or
pass '-Wl,-z,notext' to allow text relocations in the output
<span class="quote">>>> defined in a.o
>>> referenced by a.c
>>> a.o:(func2)</span >
% ./ld-new -shared a.o -o a
./ld-new: a.o: relocation R_AARCH64_ADR_PREL_PG_HI21 against symbol `func'
which may bind externally can not be used when making a shared object;
recompile with -fPIC
a.o: in function `func2':
a.c:(.text.func2+0x0): dangerous relocation: unsupported relocation</pre>
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