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| <title>STABS: Stab Section Transformations</title> |
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| <a name="Stab-Section-Transformations"></a> |
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| Previous: <a href="Transformations-On-Global-Variables.html#Transformations-On-Global-Variables" accesskey="p" rel="prev">Transformations On Global Variables</a>, Up: <a href="Transformations-On-Symbol-Tables.html#Transformations-On-Symbol-Tables" accesskey="u" rel="up">Transformations On Symbol Tables</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Symbol-Types-Index.html#Symbol-Types-Index" title="Index" rel="index">Index</a>]</p> |
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| <a name="Transformations-of-Stabs-in-separate-sections"></a> |
| <h4 class="subsection">7.2.3 Transformations of Stabs in separate sections</h4> |
| |
| <p>For object file formats using stabs in separate sections (see <a href="Stab-Sections.html#Stab-Sections">Stab Sections</a>), use <code>objdump --stabs</code> instead of <code>nm</code> to show the |
| stabs in an object or executable file. <code>objdump</code> is a GNU utility; |
| Sun does not provide any equivalent. |
| </p> |
| <p>The following example is for a stab whose value is an address is |
| relative to the compilation unit (see <a href="ELF-Linker-Relocation.html#ELF-Linker-Relocation">ELF Linker Relocation</a>). For |
| example, if the source line |
| </p> |
| <div class="example"> |
| <pre class="example">static int ld = 5; |
| </pre></div> |
| |
| <p>appears within a function, then the assembly language output from the |
| compiler contains: |
| </p> |
| <div class="example"> |
| <pre class="example">.Ddata.data: |
| … |
| .stabs "ld:V(0,3)",0x26,0,4,.L18-Ddata.data # <span class="roman">0x26 is N_STSYM</span> |
| … |
| .L18: |
| .align 4 |
| .word 0x5 |
| </pre></div> |
| |
| <p>Because the value is formed by subtracting one symbol from another, the |
| value is absolute, not relocatable, and so the object file contains |
| </p> |
| <div class="example"> |
| <pre class="example">Symnum n_type n_othr n_desc n_value n_strx String |
| 31 STSYM 0 4 00000004 680 ld:V(0,3) |
| </pre></div> |
| |
| <p>without any relocations, and the executable file also contains |
| </p> |
| <div class="example"> |
| <pre class="example">Symnum n_type n_othr n_desc n_value n_strx String |
| 31 STSYM 0 4 00000004 680 ld:V(0,3) |
| </pre></div> |
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