249 lines
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249 lines
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<!--
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This file documents the BFD library.
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Copyright (C) 1991, 2000, 2001, 2003, 2006, 2007 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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</head>
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<div class="node">
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<p>
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<a name="symbol-handling-functions"></a>Previous: <a rel="previous" accesskey="p" href="typedef-asymbol.html#typedef-asymbol">typedef asymbol</a>,
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Up: <a rel="up" accesskey="u" href="Symbols.html#Symbols">Symbols</a>
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<hr><br>
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</div>
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<h4 class="subsection">2.7.5 Symbol handling functions</h4>
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<p><a name="index-bfd_005fget_005fsymtab_005fupper_005fbound-59"></a>
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<h5 class="subsubsection">2.7.5.1 <code>bfd_get_symtab_upper_bound</code></h5>
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<p><strong>Description</strong><br>
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Return the number of bytes required to store a vector of pointers
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to <code>asymbols</code> for all the symbols in the BFD <var>abfd</var>,
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including a terminal NULL pointer. If there are no symbols in
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the BFD, then return 0. If an error occurs, return -1.
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<pre class="example"> #define bfd_get_symtab_upper_bound(abfd) \
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BFD_SEND (abfd, _bfd_get_symtab_upper_bound, (abfd))
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</pre>
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<p><a name="index-bfd_005fis_005flocal_005flabel-60"></a>
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<h5 class="subsubsection">2.7.5.2 <code>bfd_is_local_label</code></h5>
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<p><strong>Synopsis</strong>
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<pre class="example"> bfd_boolean bfd_is_local_label (bfd *abfd, asymbol *sym);
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</pre>
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<p><strong>Description</strong><br>
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Return TRUE if the given symbol <var>sym</var> in the BFD <var>abfd</var> is
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a compiler generated local label, else return FALSE.
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<p><a name="index-bfd_005fis_005flocal_005flabel_005fname-61"></a>
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<h5 class="subsubsection">2.7.5.3 <code>bfd_is_local_label_name</code></h5>
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<p><strong>Synopsis</strong>
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<pre class="example"> bfd_boolean bfd_is_local_label_name (bfd *abfd, const char *name);
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</pre>
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<p><strong>Description</strong><br>
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Return TRUE if a symbol with the name <var>name</var> in the BFD
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<var>abfd</var> is a compiler generated local label, else return
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FALSE. This just checks whether the name has the form of a
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local label.
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<pre class="example"> #define bfd_is_local_label_name(abfd, name) \
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BFD_SEND (abfd, _bfd_is_local_label_name, (abfd, name))
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</pre>
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<p><a name="index-bfd_005fis_005ftarget_005fspecial_005fsymbol-62"></a>
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<h5 class="subsubsection">2.7.5.4 <code>bfd_is_target_special_symbol</code></h5>
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<p><strong>Synopsis</strong>
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<pre class="example"> bfd_boolean bfd_is_target_special_symbol (bfd *abfd, asymbol *sym);
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</pre>
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<p><strong>Description</strong><br>
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Return TRUE iff a symbol <var>sym</var> in the BFD <var>abfd</var> is something
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special to the particular target represented by the BFD. Such symbols
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should normally not be mentioned to the user.
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<pre class="example"> #define bfd_is_target_special_symbol(abfd, sym) \
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BFD_SEND (abfd, _bfd_is_target_special_symbol, (abfd, sym))
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</pre>
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<p><a name="index-bfd_005fcanonicalize_005fsymtab-63"></a>
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<h5 class="subsubsection">2.7.5.5 <code>bfd_canonicalize_symtab</code></h5>
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<p><strong>Description</strong><br>
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Read the symbols from the BFD <var>abfd</var>, and fills in
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the vector <var>location</var> with pointers to the symbols and
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a trailing NULL.
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Return the actual number of symbol pointers, not
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including the NULL.
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<pre class="example"> #define bfd_canonicalize_symtab(abfd, location) \
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BFD_SEND (abfd, _bfd_canonicalize_symtab, (abfd, location))
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</pre>
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<p><a name="index-bfd_005fset_005fsymtab-64"></a>
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<h5 class="subsubsection">2.7.5.6 <code>bfd_set_symtab</code></h5>
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<p><strong>Synopsis</strong>
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<pre class="example"> bfd_boolean bfd_set_symtab
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(bfd *abfd, asymbol **location, unsigned int count);
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</pre>
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<p><strong>Description</strong><br>
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Arrange that when the output BFD <var>abfd</var> is closed,
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the table <var>location</var> of <var>count</var> pointers to symbols
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will be written.
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<p><a name="index-bfd_005fprint_005fsymbol_005fvandf-65"></a>
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<h5 class="subsubsection">2.7.5.7 <code>bfd_print_symbol_vandf</code></h5>
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<p><strong>Synopsis</strong>
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<pre class="example"> void bfd_print_symbol_vandf (bfd *abfd, void *file, asymbol *symbol);
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</pre>
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<p><strong>Description</strong><br>
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Print the value and flags of the <var>symbol</var> supplied to the
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stream <var>file</var>.
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<p><a name="index-bfd_005fmake_005fempty_005fsymbol-66"></a>
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<h5 class="subsubsection">2.7.5.8 <code>bfd_make_empty_symbol</code></h5>
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<p><strong>Description</strong><br>
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Create a new <code>asymbol</code> structure for the BFD <var>abfd</var>
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and return a pointer to it.
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<p>This routine is necessary because each back end has private
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information surrounding the <code>asymbol</code>. Building your own
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<code>asymbol</code> and pointing to it will not create the private
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information, and will cause problems later on.
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<pre class="example"> #define bfd_make_empty_symbol(abfd) \
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BFD_SEND (abfd, _bfd_make_empty_symbol, (abfd))
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</pre>
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<p><a name="index-_005fbfd_005fgeneric_005fmake_005fempty_005fsymbol-67"></a>
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<h5 class="subsubsection">2.7.5.9 <code>_bfd_generic_make_empty_symbol</code></h5>
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<p><strong>Synopsis</strong>
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<pre class="example"> asymbol *_bfd_generic_make_empty_symbol (bfd *);
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</pre>
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<p><strong>Description</strong><br>
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Create a new <code>asymbol</code> structure for the BFD <var>abfd</var>
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and return a pointer to it. Used by core file routines,
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binary back-end and anywhere else where no private info
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is needed.
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<p><a name="index-bfd_005fmake_005fdebug_005fsymbol-68"></a>
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<h5 class="subsubsection">2.7.5.10 <code>bfd_make_debug_symbol</code></h5>
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<p><strong>Description</strong><br>
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Create a new <code>asymbol</code> structure for the BFD <var>abfd</var>,
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to be used as a debugging symbol. Further details of its use have
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yet to be worked out.
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<pre class="example"> #define bfd_make_debug_symbol(abfd,ptr,size) \
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BFD_SEND (abfd, _bfd_make_debug_symbol, (abfd, ptr, size))
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</pre>
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<p><a name="index-bfd_005fdecode_005fsymclass-69"></a>
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<h5 class="subsubsection">2.7.5.11 <code>bfd_decode_symclass</code></h5>
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<p><strong>Description</strong><br>
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Return a character corresponding to the symbol
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class of <var>symbol</var>, or '?' for an unknown class.
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<p><strong>Synopsis</strong>
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<pre class="example"> int bfd_decode_symclass (asymbol *symbol);
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</pre>
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<p><a name="index-bfd_005fis_005fundefined_005fsymclass-70"></a>
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<h5 class="subsubsection">2.7.5.12 <code>bfd_is_undefined_symclass</code></h5>
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<p><strong>Description</strong><br>
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Returns non-zero if the class symbol returned by
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bfd_decode_symclass represents an undefined symbol.
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Returns zero otherwise.
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<p><strong>Synopsis</strong>
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<pre class="example"> bfd_boolean bfd_is_undefined_symclass (int symclass);
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</pre>
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<p><a name="index-bfd_005fsymbol_005finfo-71"></a>
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<h5 class="subsubsection">2.7.5.13 <code>bfd_symbol_info</code></h5>
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<p><strong>Description</strong><br>
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Fill in the basic info about symbol that nm needs.
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Additional info may be added by the back-ends after
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calling this function.
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<p><strong>Synopsis</strong>
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<pre class="example"> void bfd_symbol_info (asymbol *symbol, symbol_info *ret);
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</pre>
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<p><a name="index-bfd_005fcopy_005fprivate_005fsymbol_005fdata-72"></a>
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<h5 class="subsubsection">2.7.5.14 <code>bfd_copy_private_symbol_data</code></h5>
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<p><strong>Synopsis</strong>
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<pre class="example"> bfd_boolean bfd_copy_private_symbol_data
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(bfd *ibfd, asymbol *isym, bfd *obfd, asymbol *osym);
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</pre>
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<p><strong>Description</strong><br>
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Copy private symbol information from <var>isym</var> in the BFD
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<var>ibfd</var> to the symbol <var>osym</var> in the BFD <var>obfd</var>.
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Return <code>TRUE</code> on success, <code>FALSE</code> on error. Possible error
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returns are:
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<ul>
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<li><code>bfd_error_no_memory</code> -
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Not enough memory exists to create private data for <var>osec</var>.
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</ul>
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<pre class="example"> #define bfd_copy_private_symbol_data(ibfd, isymbol, obfd, osymbol) \
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BFD_SEND (obfd, _bfd_copy_private_symbol_data, \
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(ibfd, isymbol, obfd, osymbol))
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</pre>
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