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| <h3 class="section">5.9 Giving a Type a Name</h3> |
| |
| <p><a name="index-N_005fLSYM_002c-for-types-49"></a><a name="index-C_005fDECL_002c-for-types-50"></a>To give a type a name, use the ‘<samp><span class="samp">t</span></samp>’ symbol descriptor. The type |
| is specified by the type information (see <a href="String-Field.html#String-Field">String Field</a>) for the stab. |
| For example, |
| |
| <pre class="example"> .stabs "s_typedef:t16",128,0,0,0 # <span class="roman">128 is N_LSYM</span> |
| </pre> |
| <p>specifies that <code>s_typedef</code> refers to type number 16. Such stabs |
| have symbol type <code>N_LSYM</code> (or <code>C_DECL</code> for XCOFF). (The Sun |
| documentation mentions using <code>N_GSYM</code> in some cases). |
| |
| <p>If you are specifying the tag name for a structure, union, or |
| enumeration, use the ‘<samp><span class="samp">T</span></samp>’ symbol descriptor instead. I believe C is |
| the only language with this feature. |
| |
| <p>If the type is an opaque type (I believe this is a Modula-2 feature), |
| AIX provides a type descriptor to specify it. The type descriptor is |
| ‘<samp><span class="samp">o</span></samp>’ and is followed by a name. I don't know what the name |
| means—is it always the same as the name of the type, or is this type |
| descriptor used with a nameless stab (see <a href="String-Field.html#String-Field">String Field</a>)? There |
| optionally follows a comma followed by type information which defines |
| the type of this type. If omitted, a semicolon is used in place of the |
| comma and the type information, and the type is much like a generic |
| pointer type—it has a known size but little else about it is |
| specified. |
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