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<a name="Transformations-On-Global-Variables"></a>
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<a name="Transformations-on-Global-Variables"></a>
<h4 class="subsection">7.2.2 Transformations on Global Variables</h4>

<p>Stabs for global variables do not contain location information. In
this case, the debugger finds location information in the assembler or
linker symbol table entry describing the variable.  The source line:
</p>
<div class="example">
<pre class="example">char g_foo = 'c';
</pre></div>

<p>generates the stab:
</p>
<div class="example">
<pre class="example">.stabs &quot;g_foo:G2&quot;,32,0,0,0
</pre></div>

<p>The variable is represented by two symbol table entries in the object
file (see below).  The first one originated as a stab.  The second one
is an external symbol.  The upper case &lsquo;<samp>D</samp>&rsquo; signifies that the
<code>n_type</code> field of the symbol table contains 7, <code>N_DATA</code> with
local linkage.  The stab&rsquo;s value is zero since the value is not used for
<code>N_GSYM</code> stabs.  The value of the linker symbol is the relocatable
address corresponding to the variable.
</p>
<div class="example">
<pre class="example">00000000 - 00 0000  GSYM g_foo:G2
00000080 D _g_foo
</pre></div>

<p>These entries as transformed by the linker.  The linker symbol table
entry now holds an absolute address:
</p>
<div class="example">
<pre class="example">00000000 - 00 0000  GSYM g_foo:G2
&hellip;
0000e008 D _g_foo
</pre></div>


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