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690 lines
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HTML
690 lines
29 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- This file documents the BFD library.
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Copyright (C) 1991-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "GNU General Public License" and "Funding
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Free Software", the Front-Cover texts being (a) (see below), and with
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the Back-Cover Texts being (b) (see below). A copy of the license is
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included in the section entitled "GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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You have freedom to copy and modify this GNU Manual, like GNU
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software. Copies published by the Free Software Foundation raise
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funds for GNU development. -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Miscellaneous (Untitled Document)</title>
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<meta name="description" content="Miscellaneous (Untitled Document)">
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<meta name="keywords" content="Miscellaneous (Untitled Document)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="BFD-Index.html#BFD-Index" rel="index" title="BFD Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="BFD-front-end.html#BFD-front-end" rel="up" title="BFD front end">
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<link href="Memory-Usage.html#Memory-Usage" rel="next" title="Memory Usage">
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<link href="Error-reporting.html#Error-reporting" rel="prev" title="Error reporting">
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<style type="text/css">
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blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
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div.display {margin-left: 3.2em}
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div.example {margin-left: 3.2em}
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kbd {font-style: oblique}
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pre.display {font-family: inherit}
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pre.smallformat {font-family: inherit; font-size: smaller}
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span.nolinebreak {white-space: nowrap}
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span.roman {font-family: initial; font-weight: normal}
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ul.no-bullet {list-style: none}
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-->
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</style>
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</head>
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<body lang="en">
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<a name="Miscellaneous"></a>
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<div class="header">
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<p>
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Next: <a href="Memory-Usage.html#Memory-Usage" accesskey="n" rel="next">Memory Usage</a>, Previous: <a href="Error-reporting.html#Error-reporting" accesskey="p" rel="prev">Error reporting</a>, Up: <a href="BFD-front-end.html#BFD-front-end" accesskey="u" rel="up">BFD front end</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="BFD-Index.html#BFD-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Miscellaneous-1"></a>
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<h3 class="section">2.3 Miscellaneous</h3>
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<a name="Miscellaneous-functions"></a>
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<h4 class="subsection">2.3.1 Miscellaneous functions</h4>
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<a name="index-bfd_005fget_005freloc_005fupper_005fbound"></a>
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<a name="bfd_005fget_005freloc_005fupper_005fbound"></a>
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<h4 class="subsubsection">2.3.1.1 <code>bfd_get_reloc_upper_bound</code></h4>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">long bfd_get_reloc_upper_bound (bfd *abfd, asection *sect);
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</pre></div>
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<p><strong>Description</strong><br>
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Return the number of bytes required to store the
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relocation information associated with section <var>sect</var>
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attached to bfd <var>abfd</var>. If an error occurs, return -1.
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</p>
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<a name="index-bfd_005fcanonicalize_005freloc"></a>
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<a name="bfd_005fcanonicalize_005freloc"></a>
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<h4 class="subsubsection">2.3.1.2 <code>bfd_canonicalize_reloc</code></h4>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">long bfd_canonicalize_reloc
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(bfd *abfd, asection *sec, arelent **loc, asymbol **syms);
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</pre></div>
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<p><strong>Description</strong><br>
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Call the back end associated with the open BFD
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<var>abfd</var> and translate the external form of the relocation
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information attached to <var>sec</var> into the internal canonical
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form. Place the table into memory at <var>loc</var>, which has
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been preallocated, usually by a call to
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<code>bfd_get_reloc_upper_bound</code>. Returns the number of relocs, or
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-1 on error.
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</p>
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<p>The <var>syms</var> table is also needed for horrible internal magic
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reasons.
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</p>
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<a name="index-bfd_005fset_005freloc"></a>
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<a name="bfd_005fset_005freloc"></a>
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<h4 class="subsubsection">2.3.1.3 <code>bfd_set_reloc</code></h4>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">void bfd_set_reloc
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(bfd *abfd, asection *sec, arelent **rel, unsigned int count);
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</pre></div>
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<p><strong>Description</strong><br>
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Set the relocation pointer and count within
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section <var>sec</var> to the values <var>rel</var> and <var>count</var>.
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The argument <var>abfd</var> is ignored.
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</p><div class="example">
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<pre class="example">#define bfd_set_reloc(abfd, asect, location, count) \
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BFD_SEND (abfd, _bfd_set_reloc, (abfd, asect, location, count))
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</pre></div>
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<a name="index-bfd_005fset_005ffile_005fflags"></a>
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<a name="bfd_005fset_005ffile_005fflags"></a>
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<h4 class="subsubsection">2.3.1.4 <code>bfd_set_file_flags</code></h4>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">bfd_boolean bfd_set_file_flags (bfd *abfd, flagword flags);
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</pre></div>
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<p><strong>Description</strong><br>
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Set the flag word in the BFD <var>abfd</var> to the value <var>flags</var>.
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</p>
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<p>Possible errors are:
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</p><ul>
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<li> <code>bfd_error_wrong_format</code> - The target bfd was not of object format.
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</li><li> <code>bfd_error_invalid_operation</code> - The target bfd was open for reading.
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</li><li> <code>bfd_error_invalid_operation</code> -
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The flag word contained a bit which was not applicable to the
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type of file. E.g., an attempt was made to set the <code>D_PAGED</code> bit
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on a BFD format which does not support demand paging.
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</li></ul>
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<a name="index-bfd_005fget_005farch_005fsize"></a>
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<a name="bfd_005fget_005farch_005fsize"></a>
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<h4 class="subsubsection">2.3.1.5 <code>bfd_get_arch_size</code></h4>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">int bfd_get_arch_size (bfd *abfd);
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</pre></div>
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<p><strong>Description</strong><br>
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Returns the normalized architecture address size, in bits, as
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determined by the object file’s format. By normalized, we mean
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either 32 or 64. For ELF, this information is included in the
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header. Use bfd_arch_bits_per_address for number of bits in
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the architecture address.
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</p>
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<p><strong>Returns</strong><br>
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Returns the arch size in bits if known, <code>-1</code> otherwise.
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</p>
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<a name="index-bfd_005fget_005fsign_005fextend_005fvma"></a>
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<a name="bfd_005fget_005fsign_005fextend_005fvma"></a>
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<h4 class="subsubsection">2.3.1.6 <code>bfd_get_sign_extend_vma</code></h4>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">int bfd_get_sign_extend_vma (bfd *abfd);
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</pre></div>
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<p><strong>Description</strong><br>
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Indicates if the target architecture "naturally" sign extends
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an address. Some architectures implicitly sign extend address
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values when they are converted to types larger than the size
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of an address. For instance, bfd_get_start_address() will
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return an address sign extended to fill a bfd_vma when this is
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the case.
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</p>
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<p><strong>Returns</strong><br>
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Returns <code>1</code> if the target architecture is known to sign
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extend addresses, <code>0</code> if the target architecture is known to
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not sign extend addresses, and <code>-1</code> otherwise.
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</p>
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<a name="index-bfd_005fset_005fstart_005faddress"></a>
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<a name="bfd_005fset_005fstart_005faddress"></a>
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<h4 class="subsubsection">2.3.1.7 <code>bfd_set_start_address</code></h4>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">bfd_boolean bfd_set_start_address (bfd *abfd, bfd_vma vma);
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</pre></div>
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<p><strong>Description</strong><br>
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Make <var>vma</var> the entry point of output BFD <var>abfd</var>.
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</p>
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<p><strong>Returns</strong><br>
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Returns <code>TRUE</code> on success, <code>FALSE</code> otherwise.
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</p>
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<a name="index-bfd_005fget_005fgp_005fsize"></a>
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<a name="bfd_005fget_005fgp_005fsize"></a>
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<h4 class="subsubsection">2.3.1.8 <code>bfd_get_gp_size</code></h4>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">unsigned int bfd_get_gp_size (bfd *abfd);
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</pre></div>
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<p><strong>Description</strong><br>
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Return the maximum size of objects to be optimized using the GP
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register under MIPS ECOFF. This is typically set by the <code>-G</code>
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argument to the compiler, assembler or linker.
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</p>
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<a name="index-bfd_005fset_005fgp_005fsize"></a>
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<a name="bfd_005fset_005fgp_005fsize"></a>
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<h4 class="subsubsection">2.3.1.9 <code>bfd_set_gp_size</code></h4>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">void bfd_set_gp_size (bfd *abfd, unsigned int i);
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</pre></div>
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<p><strong>Description</strong><br>
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Set the maximum size of objects to be optimized using the GP
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register under ECOFF or MIPS ELF. This is typically set by
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the <code>-G</code> argument to the compiler, assembler or linker.
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</p>
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<a name="index-bfd_005fscan_005fvma"></a>
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<a name="bfd_005fscan_005fvma"></a>
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<h4 class="subsubsection">2.3.1.10 <code>bfd_scan_vma</code></h4>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">bfd_vma bfd_scan_vma (const char *string, const char **end, int base);
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</pre></div>
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<p><strong>Description</strong><br>
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Convert, like <code>strtoul</code>, a numerical expression
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<var>string</var> into a <code>bfd_vma</code> integer, and return that integer.
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(Though without as many bells and whistles as <code>strtoul</code>.)
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The expression is assumed to be unsigned (i.e., positive).
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If given a <var>base</var>, it is used as the base for conversion.
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A base of 0 causes the function to interpret the string
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in hex if a leading "0x" or "0X" is found, otherwise
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in octal if a leading zero is found, otherwise in decimal.
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</p>
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<p>If the value would overflow, the maximum <code>bfd_vma</code> value is
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returned.
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</p>
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<a name="index-bfd_005fcopy_005fprivate_005fheader_005fdata"></a>
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<a name="bfd_005fcopy_005fprivate_005fheader_005fdata"></a>
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<h4 class="subsubsection">2.3.1.11 <code>bfd_copy_private_header_data</code></h4>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">bfd_boolean bfd_copy_private_header_data (bfd *ibfd, bfd *obfd);
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</pre></div>
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<p><strong>Description</strong><br>
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Copy private BFD header information from the BFD <var>ibfd</var> to the
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the BFD <var>obfd</var>. This copies information that may require
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sections to exist, but does not require symbol tables. Return
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<code>true</code> on success, <code>false</code> on error.
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Possible error returns are:
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</p>
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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>obfd</var>.
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</li></ul>
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<div class="example">
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<pre class="example">#define bfd_copy_private_header_data(ibfd, obfd) \
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BFD_SEND (obfd, _bfd_copy_private_header_data, \
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(ibfd, obfd))
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</pre></div>
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<a name="index-bfd_005fcopy_005fprivate_005fbfd_005fdata"></a>
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<a name="bfd_005fcopy_005fprivate_005fbfd_005fdata"></a>
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<h4 class="subsubsection">2.3.1.12 <code>bfd_copy_private_bfd_data</code></h4>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">bfd_boolean bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd);
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</pre></div>
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<p><strong>Description</strong><br>
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Copy private BFD information from the BFD <var>ibfd</var> to the
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the BFD <var>obfd</var>. Return <code>TRUE</code> on success, <code>FALSE</code> on error.
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Possible error returns are:
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</p>
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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>obfd</var>.
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</li></ul>
|
||
|
|
<div class="example">
|
||
|
|
<pre class="example">#define bfd_copy_private_bfd_data(ibfd, obfd) \
|
||
|
|
BFD_SEND (obfd, _bfd_copy_private_bfd_data, \
|
||
|
|
(ibfd, obfd))
|
||
|
|
</pre></div>
|
||
|
|
|
||
|
|
<a name="index-bfd_005fset_005fprivate_005fflags"></a>
|
||
|
|
<a name="bfd_005fset_005fprivate_005fflags"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.13 <code>bfd_set_private_flags</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">bfd_boolean bfd_set_private_flags (bfd *abfd, flagword flags);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
Set private BFD flag information in the BFD <var>abfd</var>.
|
||
|
|
Return <code>TRUE</code> on success, <code>FALSE</code> on error. Possible error
|
||
|
|
returns are:
|
||
|
|
</p>
|
||
|
|
<ul>
|
||
|
|
<li> <code>bfd_error_no_memory</code> -
|
||
|
|
Not enough memory exists to create private data for <var>obfd</var>.
|
||
|
|
</li></ul>
|
||
|
|
<div class="example">
|
||
|
|
<pre class="example">#define bfd_set_private_flags(abfd, flags) \
|
||
|
|
BFD_SEND (abfd, _bfd_set_private_flags, (abfd, flags))
|
||
|
|
</pre></div>
|
||
|
|
|
||
|
|
<a name="index-Other-functions"></a>
|
||
|
|
<a name="Other-functions"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.14 <code>Other functions</code></h4>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
The following functions exist but have not yet been documented.
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">#define bfd_sizeof_headers(abfd, info) \
|
||
|
|
BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, info))
|
||
|
|
|
||
|
|
#define bfd_find_nearest_line(abfd, sec, syms, off, file, func, line) \
|
||
|
|
BFD_SEND (abfd, _bfd_find_nearest_line, \
|
||
|
|
(abfd, syms, sec, off, file, func, line, NULL))
|
||
|
|
|
||
|
|
#define bfd_find_nearest_line_discriminator(abfd, sec, syms, off, file, func, \
|
||
|
|
line, disc) \
|
||
|
|
BFD_SEND (abfd, _bfd_find_nearest_line, \
|
||
|
|
(abfd, syms, sec, off, file, func, line, disc))
|
||
|
|
|
||
|
|
#define bfd_find_line(abfd, syms, sym, file, line) \
|
||
|
|
BFD_SEND (abfd, _bfd_find_line, \
|
||
|
|
(abfd, syms, sym, file, line))
|
||
|
|
|
||
|
|
#define bfd_find_inliner_info(abfd, file, func, line) \
|
||
|
|
BFD_SEND (abfd, _bfd_find_inliner_info, \
|
||
|
|
(abfd, file, func, line))
|
||
|
|
|
||
|
|
#define bfd_debug_info_start(abfd) \
|
||
|
|
BFD_SEND (abfd, _bfd_debug_info_start, (abfd))
|
||
|
|
|
||
|
|
#define bfd_debug_info_end(abfd) \
|
||
|
|
BFD_SEND (abfd, _bfd_debug_info_end, (abfd))
|
||
|
|
|
||
|
|
#define bfd_debug_info_accumulate(abfd, section) \
|
||
|
|
BFD_SEND (abfd, _bfd_debug_info_accumulate, (abfd, section))
|
||
|
|
|
||
|
|
#define bfd_stat_arch_elt(abfd, stat) \
|
||
|
|
BFD_SEND (abfd, _bfd_stat_arch_elt,(abfd, stat))
|
||
|
|
|
||
|
|
#define bfd_update_armap_timestamp(abfd) \
|
||
|
|
BFD_SEND (abfd, _bfd_update_armap_timestamp, (abfd))
|
||
|
|
|
||
|
|
#define bfd_set_arch_mach(abfd, arch, mach)\
|
||
|
|
BFD_SEND ( abfd, _bfd_set_arch_mach, (abfd, arch, mach))
|
||
|
|
|
||
|
|
#define bfd_relax_section(abfd, section, link_info, again) \
|
||
|
|
BFD_SEND (abfd, _bfd_relax_section, (abfd, section, link_info, again))
|
||
|
|
|
||
|
|
#define bfd_gc_sections(abfd, link_info) \
|
||
|
|
BFD_SEND (abfd, _bfd_gc_sections, (abfd, link_info))
|
||
|
|
|
||
|
|
#define bfd_lookup_section_flags(link_info, flag_info, section) \
|
||
|
|
BFD_SEND (abfd, _bfd_lookup_section_flags, (link_info, flag_info, section))
|
||
|
|
|
||
|
|
#define bfd_merge_sections(abfd, link_info) \
|
||
|
|
BFD_SEND (abfd, _bfd_merge_sections, (abfd, link_info))
|
||
|
|
|
||
|
|
#define bfd_is_group_section(abfd, sec) \
|
||
|
|
BFD_SEND (abfd, _bfd_is_group_section, (abfd, sec))
|
||
|
|
|
||
|
|
#define bfd_discard_group(abfd, sec) \
|
||
|
|
BFD_SEND (abfd, _bfd_discard_group, (abfd, sec))
|
||
|
|
|
||
|
|
#define bfd_link_hash_table_create(abfd) \
|
||
|
|
BFD_SEND (abfd, _bfd_link_hash_table_create, (abfd))
|
||
|
|
|
||
|
|
#define bfd_link_add_symbols(abfd, info) \
|
||
|
|
BFD_SEND (abfd, _bfd_link_add_symbols, (abfd, info))
|
||
|
|
|
||
|
|
#define bfd_link_just_syms(abfd, sec, info) \
|
||
|
|
BFD_SEND (abfd, _bfd_link_just_syms, (sec, info))
|
||
|
|
|
||
|
|
#define bfd_final_link(abfd, info) \
|
||
|
|
BFD_SEND (abfd, _bfd_final_link, (abfd, info))
|
||
|
|
|
||
|
|
#define bfd_free_cached_info(abfd) \
|
||
|
|
BFD_SEND (abfd, _bfd_free_cached_info, (abfd))
|
||
|
|
|
||
|
|
#define bfd_get_dynamic_symtab_upper_bound(abfd) \
|
||
|
|
BFD_SEND (abfd, _bfd_get_dynamic_symtab_upper_bound, (abfd))
|
||
|
|
|
||
|
|
#define bfd_print_private_bfd_data(abfd, file)\
|
||
|
|
BFD_SEND (abfd, _bfd_print_private_bfd_data, (abfd, file))
|
||
|
|
|
||
|
|
#define bfd_canonicalize_dynamic_symtab(abfd, asymbols) \
|
||
|
|
BFD_SEND (abfd, _bfd_canonicalize_dynamic_symtab, (abfd, asymbols))
|
||
|
|
|
||
|
|
#define bfd_get_synthetic_symtab(abfd, count, syms, dyncount, dynsyms, ret) \
|
||
|
|
BFD_SEND (abfd, _bfd_get_synthetic_symtab, (abfd, count, syms, \
|
||
|
|
dyncount, dynsyms, ret))
|
||
|
|
|
||
|
|
#define bfd_get_dynamic_reloc_upper_bound(abfd) \
|
||
|
|
BFD_SEND (abfd, _bfd_get_dynamic_reloc_upper_bound, (abfd))
|
||
|
|
|
||
|
|
#define bfd_canonicalize_dynamic_reloc(abfd, arels, asyms) \
|
||
|
|
BFD_SEND (abfd, _bfd_canonicalize_dynamic_reloc, (abfd, arels, asyms))
|
||
|
|
|
||
|
|
extern bfd_byte *bfd_get_relocated_section_contents
|
||
|
|
(bfd *, struct bfd_link_info *, struct bfd_link_order *, bfd_byte *,
|
||
|
|
bfd_boolean, asymbol **);
|
||
|
|
|
||
|
|
</pre></div>
|
||
|
|
|
||
|
|
<a name="index-bfd_005falt_005fmach_005fcode"></a>
|
||
|
|
<a name="bfd_005falt_005fmach_005fcode"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.15 <code>bfd_alt_mach_code</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">bfd_boolean bfd_alt_mach_code (bfd *abfd, int alternative);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
When more than one machine code number is available for the
|
||
|
|
same machine type, this function can be used to switch between
|
||
|
|
the preferred one (alternative == 0) and any others. Currently,
|
||
|
|
only ELF supports this feature, with up to two alternate
|
||
|
|
machine codes.
|
||
|
|
</p>
|
||
|
|
<a name="index-bfd_005femul_005fget_005fmaxpagesize"></a>
|
||
|
|
<a name="bfd_005femul_005fget_005fmaxpagesize"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.16 <code>bfd_emul_get_maxpagesize</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">bfd_vma bfd_emul_get_maxpagesize (const char *);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
Returns the maximum page size, in bytes, as determined by
|
||
|
|
emulation.
|
||
|
|
</p>
|
||
|
|
<p><strong>Returns</strong><br>
|
||
|
|
Returns the maximum page size in bytes for ELF, 0 otherwise.
|
||
|
|
</p>
|
||
|
|
<a name="index-bfd_005femul_005fset_005fmaxpagesize"></a>
|
||
|
|
<a name="bfd_005femul_005fset_005fmaxpagesize"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.17 <code>bfd_emul_set_maxpagesize</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">void bfd_emul_set_maxpagesize (const char *, bfd_vma);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
For ELF, set the maximum page size for the emulation. It is
|
||
|
|
a no-op for other formats.
|
||
|
|
</p>
|
||
|
|
<a name="index-bfd_005femul_005fget_005fcommonpagesize"></a>
|
||
|
|
<a name="bfd_005femul_005fget_005fcommonpagesize"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.18 <code>bfd_emul_get_commonpagesize</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">bfd_vma bfd_emul_get_commonpagesize (const char *, bfd_boolean);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
Returns the common page size, in bytes, as determined by
|
||
|
|
emulation.
|
||
|
|
</p>
|
||
|
|
<p><strong>Returns</strong><br>
|
||
|
|
Returns the common page size in bytes for ELF, 0 otherwise.
|
||
|
|
</p>
|
||
|
|
<a name="index-bfd_005femul_005fset_005fcommonpagesize"></a>
|
||
|
|
<a name="bfd_005femul_005fset_005fcommonpagesize"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.19 <code>bfd_emul_set_commonpagesize</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">void bfd_emul_set_commonpagesize (const char *, bfd_vma);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
For ELF, set the common page size for the emulation. It is
|
||
|
|
a no-op for other formats.
|
||
|
|
</p>
|
||
|
|
<a name="index-bfd_005fdemangle"></a>
|
||
|
|
<a name="bfd_005fdemangle"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.20 <code>bfd_demangle</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">char *bfd_demangle (bfd *, const char *, int);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
Wrapper around cplus_demangle. Strips leading underscores and
|
||
|
|
other such chars that would otherwise confuse the demangler.
|
||
|
|
If passed a g++ v3 ABI mangled name, returns a buffer allocated
|
||
|
|
with malloc holding the demangled name. Returns NULL otherwise
|
||
|
|
and on memory alloc failure.
|
||
|
|
</p>
|
||
|
|
<a name="index-bfd_005fupdate_005fcompression_005fheader"></a>
|
||
|
|
<a name="bfd_005fupdate_005fcompression_005fheader"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.21 <code>bfd_update_compression_header</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">void bfd_update_compression_header
|
||
|
|
(bfd *abfd, bfd_byte *contents, asection *sec);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
Set the compression header at CONTENTS of SEC in ABFD and update
|
||
|
|
elf_section_flags for compression.
|
||
|
|
</p>
|
||
|
|
<a name="index-bfd_005fcheck_005fcompression_005fheader"></a>
|
||
|
|
<a name="bfd_005fcheck_005fcompression_005fheader"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.22 <code>bfd_check_compression_header</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">bfd_boolean bfd_check_compression_header
|
||
|
|
(bfd *abfd, bfd_byte *contents, asection *sec,
|
||
|
|
bfd_size_type *uncompressed_size,
|
||
|
|
unsigned int *uncompressed_alignment_power);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
Check the compression header at CONTENTS of SEC in ABFD and
|
||
|
|
store the uncompressed size in UNCOMPRESSED_SIZE and the
|
||
|
|
uncompressed data alignment in UNCOMPRESSED_ALIGNMENT_POWER
|
||
|
|
if the compression header is valid.
|
||
|
|
</p>
|
||
|
|
<p><strong>Returns</strong><br>
|
||
|
|
Return TRUE if the compression header is valid.
|
||
|
|
</p>
|
||
|
|
<a name="index-bfd_005fget_005fcompression_005fheader_005fsize"></a>
|
||
|
|
<a name="bfd_005fget_005fcompression_005fheader_005fsize"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.23 <code>bfd_get_compression_header_size</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">int bfd_get_compression_header_size (bfd *abfd, asection *sec);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
Return the size of the compression header of SEC in ABFD.
|
||
|
|
</p>
|
||
|
|
<p><strong>Returns</strong><br>
|
||
|
|
Return the size of the compression header in bytes.
|
||
|
|
</p>
|
||
|
|
<a name="index-bfd_005fconvert_005fsection_005fsize"></a>
|
||
|
|
<a name="bfd_005fconvert_005fsection_005fsize"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.24 <code>bfd_convert_section_size</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">bfd_size_type bfd_convert_section_size
|
||
|
|
(bfd *ibfd, asection *isec, bfd *obfd, bfd_size_type size);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
Convert the size <var>size</var> of the section <var>isec</var> in input
|
||
|
|
BFD <var>ibfd</var> to the section size in output BFD <var>obfd</var>.
|
||
|
|
</p>
|
||
|
|
<a name="index-bfd_005fconvert_005fsection_005fcontents"></a>
|
||
|
|
<a name="bfd_005fconvert_005fsection_005fcontents"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.25 <code>bfd_convert_section_contents</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">bfd_boolean bfd_convert_section_contents
|
||
|
|
(bfd *ibfd, asection *isec, bfd *obfd,
|
||
|
|
bfd_byte **ptr, bfd_size_type *ptr_size);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
Convert the contents, stored in <var>*ptr</var>, of the section
|
||
|
|
<var>isec</var> in input BFD <var>ibfd</var> to output BFD <var>obfd</var>
|
||
|
|
if needed. The original buffer pointed to by <var>*ptr</var> may
|
||
|
|
be freed and <var>*ptr</var> is returned with memory malloc’d by this
|
||
|
|
function, and the new size written to <var>ptr_size</var>.
|
||
|
|
</p>
|
||
|
|
<a name="index-struct-bfd_005fiovec"></a>
|
||
|
|
<a name="struct-bfd_005fiovec"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.26 <code>struct bfd_iovec</code></h4>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
The <code>struct bfd_iovec</code> contains the internal file I/O class.
|
||
|
|
Each <code>BFD</code> has an instance of this class and all file I/O is
|
||
|
|
routed through it (it is assumed that the instance implements
|
||
|
|
all methods listed below).
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">struct bfd_iovec
|
||
|
|
{
|
||
|
|
/* To avoid problems with macros, a "b" rather than "f"
|
||
|
|
prefix is prepended to each method name. */
|
||
|
|
/* Attempt to read/write NBYTES on ABFD's IOSTREAM storing/fetching
|
||
|
|
bytes starting at PTR. Return the number of bytes actually
|
||
|
|
transfered (a read past end-of-file returns less than NBYTES),
|
||
|
|
or -1 (setting <code>bfd_error</code>) if an error occurs. */
|
||
|
|
file_ptr (*bread) (struct bfd *abfd, void *ptr, file_ptr nbytes);
|
||
|
|
file_ptr (*bwrite) (struct bfd *abfd, const void *ptr,
|
||
|
|
file_ptr nbytes);
|
||
|
|
/* Return the current IOSTREAM file offset, or -1 (setting <code>bfd_error</code>
|
||
|
|
if an error occurs. */
|
||
|
|
file_ptr (*btell) (struct bfd *abfd);
|
||
|
|
/* For the following, on successful completion a value of 0 is returned.
|
||
|
|
Otherwise, a value of -1 is returned (and <code>bfd_error</code> is set). */
|
||
|
|
int (*bseek) (struct bfd *abfd, file_ptr offset, int whence);
|
||
|
|
int (*bclose) (struct bfd *abfd);
|
||
|
|
int (*bflush) (struct bfd *abfd);
|
||
|
|
int (*bstat) (struct bfd *abfd, struct stat *sb);
|
||
|
|
/* Mmap a part of the files. ADDR, LEN, PROT, FLAGS and OFFSET are the usual
|
||
|
|
mmap parameter, except that LEN and OFFSET do not need to be page
|
||
|
|
aligned. Returns (void *)-1 on failure, mmapped address on success.
|
||
|
|
Also write in MAP_ADDR the address of the page aligned buffer and in
|
||
|
|
MAP_LEN the size mapped (a page multiple). Use unmap with MAP_ADDR and
|
||
|
|
MAP_LEN to unmap. */
|
||
|
|
void *(*bmmap) (struct bfd *abfd, void *addr, bfd_size_type len,
|
||
|
|
int prot, int flags, file_ptr offset,
|
||
|
|
void **map_addr, bfd_size_type *map_len);
|
||
|
|
};
|
||
|
|
extern const struct bfd_iovec _bfd_memory_iovec;
|
||
|
|
</pre></div>
|
||
|
|
|
||
|
|
<a name="index-bfd_005fget_005fmtime"></a>
|
||
|
|
<a name="bfd_005fget_005fmtime"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.27 <code>bfd_get_mtime</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">long bfd_get_mtime (bfd *abfd);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
Return the file modification time (as read from the file system, or
|
||
|
|
from the archive header for archive members).
|
||
|
|
</p>
|
||
|
|
<a name="index-bfd_005fget_005fsize"></a>
|
||
|
|
<a name="bfd_005fget_005fsize"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.28 <code>bfd_get_size</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">ufile_ptr bfd_get_size (bfd *abfd);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
Return the file size (as read from file system) for the file
|
||
|
|
associated with BFD <var>abfd</var>.
|
||
|
|
</p>
|
||
|
|
<p>The initial motivation for, and use of, this routine is not
|
||
|
|
so we can get the exact size of the object the BFD applies to, since
|
||
|
|
that might not be generally possible (archive members for example).
|
||
|
|
It would be ideal if someone could eventually modify
|
||
|
|
it so that such results were guaranteed.
|
||
|
|
</p>
|
||
|
|
<p>Instead, we want to ask questions like "is this NNN byte sized
|
||
|
|
object I’m about to try read from file offset YYY reasonable?"
|
||
|
|
As as example of where we might do this, some object formats
|
||
|
|
use string tables for which the first <code>sizeof (long)</code> bytes of the
|
||
|
|
table contain the size of the table itself, including the size bytes.
|
||
|
|
If an application tries to read what it thinks is one of these
|
||
|
|
string tables, without some way to validate the size, and for
|
||
|
|
some reason the size is wrong (byte swapping error, wrong location
|
||
|
|
for the string table, etc.), the only clue is likely to be a read
|
||
|
|
error when it tries to read the table, or a "virtual memory
|
||
|
|
exhausted" error when it tries to allocate 15 bazillon bytes
|
||
|
|
of space for the 15 bazillon byte table it is about to read.
|
||
|
|
This function at least allows us to answer the question, "is the
|
||
|
|
size reasonable?".
|
||
|
|
</p>
|
||
|
|
<a name="index-bfd_005fget_005ffile_005fsize"></a>
|
||
|
|
<a name="bfd_005fget_005ffile_005fsize"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.29 <code>bfd_get_file_size</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">ufile_ptr bfd_get_file_size (bfd *abfd);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
Return the file size (as read from file system) for the file
|
||
|
|
associated with BFD <var>abfd</var>. It supports both normal files
|
||
|
|
and archive elements.
|
||
|
|
</p>
|
||
|
|
<a name="index-bfd_005fmmap"></a>
|
||
|
|
<a name="bfd_005fmmap"></a>
|
||
|
|
<h4 class="subsubsection">2.3.1.30 <code>bfd_mmap</code></h4>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">void *bfd_mmap (bfd *abfd, void *addr, bfd_size_type len,
|
||
|
|
int prot, int flags, file_ptr offset,
|
||
|
|
void **map_addr, bfd_size_type *map_len);
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
Return mmap()ed region of the file, if possible and implemented.
|
||
|
|
LEN and OFFSET do not need to be page aligned. The page aligned
|
||
|
|
address and length are written to MAP_ADDR and MAP_LEN.
|
||
|
|
</p>
|
||
|
|
|
||
|
|
<hr>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="Memory-Usage.html#Memory-Usage" accesskey="n" rel="next">Memory Usage</a>, Previous: <a href="Error-reporting.html#Error-reporting" accesskey="p" rel="prev">Error reporting</a>, Up: <a href="BFD-front-end.html#BFD-front-end" accesskey="u" rel="up">BFD front end</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="BFD-Index.html#BFD-Index" title="Index" rel="index">Index</a>]</p>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|