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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - ARM integrated assembler fails to parse the symbol variants it generates"
href="http://llvm.org/bugs/show_bug.cgi?id=18080">18080</a>
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<th>Summary</th>
<td>ARM integrated assembler fails to parse the symbol variants it generates
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<th>Product</th>
<td>tools
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>llc
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>dpeixott@codeaurora.org
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>The integrated assembler for ARM fails to parse the assembly it generates for
symbol variants (e.g. foo(plt)). This is a problem for even a simple hello
world in c++
#include <iostream>
void foo() {
std::cout << "Hi";
}
because of the static initializer used for global iostream objects:
<a href="http://llvm.org/docs/FAQ.html#what-is-this-llvm-global-ctors-and-global-i-a-stuff-that-happens-when-i-include-iostream">http://llvm.org/docs/FAQ.html#what-is-this-llvm-global-ctors-and-global-i-a-stuff-that-happens-when-i-include-iostream</a>
The assembly that clang generates includes a section like this:
.section .init_array,"aw",%init_array
.align 2
.long _GLOBAL__I_a(target1)
but when we try to parse this assembly, we get an error:
t.s:91:20: error: unexpected token in directive
.long _GLOBAL__I_a(target1)
^
The problem is that the asm parser only has support for symbol variants that
are separated from the symbol by an '@' (e.g. foo@plt). The arm assembly (at
least on linux) uses parens to separate the symbol from its variant (e.g.
target1 in this case).</pre>
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