You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
238 lines
9.3 KiB
HTML
238 lines
9.3 KiB
HTML
<html lang="en">
|
|
<head>
|
|
<title>Internal - Untitled</title>
|
|
<meta http-equiv="Content-Type" content="text/html">
|
|
<meta name="description" content="Untitled">
|
|
<meta name="generator" content="makeinfo 4.7">
|
|
<link title="Top" rel="start" href="index.html#Top">
|
|
<link rel="up" href="BFD-front-end.html#BFD-front-end" title="BFD front end">
|
|
<link rel="prev" href="Opening-and-Closing.html#Opening-and-Closing" title="Opening and Closing">
|
|
<link rel="next" href="File-Caching.html#File-Caching" title="File Caching">
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
<!--
|
|
This file documents the BFD library.
|
|
|
|
Copyright (C) 1991, 2000, 2001, 2003, 2006, 2007 Free Software Foundation, Inc.
|
|
|
|
Permission is granted to copy, distribute and/or modify this document
|
|
under the terms of the GNU Free Documentation License, Version 1.1 or
|
|
any later version published by the Free Software Foundation; with the
|
|
Invariant Sections being ``GNU General Public License'' and ``Funding
|
|
Free Software'', the Front-Cover texts being (a) (see below), and with
|
|
the Back-Cover Texts being (b) (see below). A copy of the license is
|
|
included in the section entitled ``GNU Free Documentation License''.
|
|
|
|
(a) The FSF's Front-Cover Text is:
|
|
|
|
A GNU Manual
|
|
|
|
(b) The FSF's Back-Cover Text is:
|
|
|
|
You have freedom to copy and modify this GNU Manual, like GNU
|
|
software. Copies published by the Free Software Foundation raise
|
|
funds for GNU development.-->
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
|
<style type="text/css"><!--
|
|
pre.display { font-family:inherit }
|
|
pre.format { font-family:inherit }
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
|
pre.smallexample { font-size:smaller }
|
|
pre.smalllisp { font-size:smaller }
|
|
span.sc { font-variant:small-caps }
|
|
span.roman { font-family: serif; font-weight: normal; }
|
|
--></style>
|
|
</head>
|
|
<body>
|
|
<div class="node">
|
|
<p>
|
|
<a name="Internal"></a>Next: <a rel="next" accesskey="n" href="File-Caching.html#File-Caching">File Caching</a>,
|
|
Previous: <a rel="previous" accesskey="p" href="Opening-and-Closing.html#Opening-and-Closing">Opening and Closing</a>,
|
|
Up: <a rel="up" accesskey="u" href="BFD-front-end.html#BFD-front-end">BFD front end</a>
|
|
<hr><br>
|
|
</div>
|
|
|
|
<h3 class="section">2.15 Implementation details</h3>
|
|
|
|
<h4 class="subsection">2.15.1 Internal functions</h4>
|
|
|
|
<p><strong>Description</strong><br>
|
|
These routines are used within BFD.
|
|
They are not intended for export, but are documented here for
|
|
completeness.
|
|
|
|
<p><a name="index-bfd_005fwrite_005fbigendian_005f4byte_005fint-1359"></a>
|
|
|
|
<h5 class="subsubsection">2.15.1.1 <code>bfd_write_bigendian_4byte_int</code></h5>
|
|
|
|
<p><strong>Synopsis</strong>
|
|
<pre class="example"> bfd_boolean bfd_write_bigendian_4byte_int (bfd *, unsigned int);
|
|
</pre>
|
|
<p><strong>Description</strong><br>
|
|
Write a 4 byte integer <var>i</var> to the output BFD <var>abfd</var>, in big
|
|
endian order regardless of what else is going on. This is useful in
|
|
archives.
|
|
|
|
<p><a name="index-bfd_005fput_005fsize-1360"></a>
|
|
|
|
<h5 class="subsubsection">2.15.1.2 <code>bfd_put_size</code></h5>
|
|
|
|
<p><a name="index-bfd_005fget_005fsize-1361"></a>
|
|
|
|
<h5 class="subsubsection">2.15.1.3 <code>bfd_get_size</code></h5>
|
|
|
|
<p><strong>Description</strong><br>
|
|
These macros as used for reading and writing raw data in
|
|
sections; each access (except for bytes) is vectored through
|
|
the target format of the BFD and mangled accordingly. The
|
|
mangling performs any necessary endian translations and
|
|
removes alignment restrictions. Note that types accepted and
|
|
returned by these macros are identical so they can be swapped
|
|
around in macros—for example, <span class="file">libaout.h</span> defines <code>GET_WORD</code>
|
|
to either <code>bfd_get_32</code> or <code>bfd_get_64</code>.
|
|
|
|
<p>In the put routines, <var>val</var> must be a <code>bfd_vma</code>. If we are on a
|
|
system without prototypes, the caller is responsible for making
|
|
sure that is true, with a cast if necessary. We don't cast
|
|
them in the macro definitions because that would prevent <code>lint</code>
|
|
or <code>gcc -Wall</code> from detecting sins such as passing a pointer.
|
|
To detect calling these with less than a <code>bfd_vma</code>, use
|
|
<code>gcc -Wconversion</code> on a host with 64 bit <code>bfd_vma</code>'s.
|
|
<pre class="example">
|
|
/* Byte swapping macros for user section data. */
|
|
|
|
#define bfd_put_8(abfd, val, ptr) \
|
|
((void) (*((unsigned char *) (ptr)) = (val) & 0xff))
|
|
#define bfd_put_signed_8 \
|
|
bfd_put_8
|
|
#define bfd_get_8(abfd, ptr) \
|
|
(*(unsigned char *) (ptr) & 0xff)
|
|
#define bfd_get_signed_8(abfd, ptr) \
|
|
(((*(unsigned char *) (ptr) & 0xff) ^ 0x80) - 0x80)
|
|
|
|
#define bfd_put_16(abfd, val, ptr) \
|
|
BFD_SEND (abfd, bfd_putx16, ((val),(ptr)))
|
|
#define bfd_put_signed_16 \
|
|
bfd_put_16
|
|
#define bfd_get_16(abfd, ptr) \
|
|
BFD_SEND (abfd, bfd_getx16, (ptr))
|
|
#define bfd_get_signed_16(abfd, ptr) \
|
|
BFD_SEND (abfd, bfd_getx_signed_16, (ptr))
|
|
|
|
#define bfd_put_32(abfd, val, ptr) \
|
|
BFD_SEND (abfd, bfd_putx32, ((val),(ptr)))
|
|
#define bfd_put_signed_32 \
|
|
bfd_put_32
|
|
#define bfd_get_32(abfd, ptr) \
|
|
BFD_SEND (abfd, bfd_getx32, (ptr))
|
|
#define bfd_get_signed_32(abfd, ptr) \
|
|
BFD_SEND (abfd, bfd_getx_signed_32, (ptr))
|
|
|
|
#define bfd_put_64(abfd, val, ptr) \
|
|
BFD_SEND (abfd, bfd_putx64, ((val), (ptr)))
|
|
#define bfd_put_signed_64 \
|
|
bfd_put_64
|
|
#define bfd_get_64(abfd, ptr) \
|
|
BFD_SEND (abfd, bfd_getx64, (ptr))
|
|
#define bfd_get_signed_64(abfd, ptr) \
|
|
BFD_SEND (abfd, bfd_getx_signed_64, (ptr))
|
|
|
|
#define bfd_get(bits, abfd, ptr) \
|
|
((bits) == 8 ? (bfd_vma) bfd_get_8 (abfd, ptr) \
|
|
: (bits) == 16 ? bfd_get_16 (abfd, ptr) \
|
|
: (bits) == 32 ? bfd_get_32 (abfd, ptr) \
|
|
: (bits) == 64 ? bfd_get_64 (abfd, ptr) \
|
|
: (abort (), (bfd_vma) - 1))
|
|
|
|
#define bfd_put(bits, abfd, val, ptr) \
|
|
((bits) == 8 ? bfd_put_8 (abfd, val, ptr) \
|
|
: (bits) == 16 ? bfd_put_16 (abfd, val, ptr) \
|
|
: (bits) == 32 ? bfd_put_32 (abfd, val, ptr) \
|
|
: (bits) == 64 ? bfd_put_64 (abfd, val, ptr) \
|
|
: (abort (), (void) 0))
|
|
|
|
</pre>
|
|
<p><a name="index-bfd_005fh_005fput_005fsize-1362"></a>
|
|
|
|
<h5 class="subsubsection">2.15.1.4 <code>bfd_h_put_size</code></h5>
|
|
|
|
<p><strong>Description</strong><br>
|
|
These macros have the same function as their <code>bfd_get_x</code>
|
|
brethren, except that they are used for removing information
|
|
for the header records of object files. Believe it or not,
|
|
some object files keep their header records in big endian
|
|
order and their data in little endian order.
|
|
<pre class="example">
|
|
/* Byte swapping macros for file header data. */
|
|
|
|
#define bfd_h_put_8(abfd, val, ptr) \
|
|
bfd_put_8 (abfd, val, ptr)
|
|
#define bfd_h_put_signed_8(abfd, val, ptr) \
|
|
bfd_put_8 (abfd, val, ptr)
|
|
#define bfd_h_get_8(abfd, ptr) \
|
|
bfd_get_8 (abfd, ptr)
|
|
#define bfd_h_get_signed_8(abfd, ptr) \
|
|
bfd_get_signed_8 (abfd, ptr)
|
|
|
|
#define bfd_h_put_16(abfd, val, ptr) \
|
|
BFD_SEND (abfd, bfd_h_putx16, (val, ptr))
|
|
#define bfd_h_put_signed_16 \
|
|
bfd_h_put_16
|
|
#define bfd_h_get_16(abfd, ptr) \
|
|
BFD_SEND (abfd, bfd_h_getx16, (ptr))
|
|
#define bfd_h_get_signed_16(abfd, ptr) \
|
|
BFD_SEND (abfd, bfd_h_getx_signed_16, (ptr))
|
|
|
|
#define bfd_h_put_32(abfd, val, ptr) \
|
|
BFD_SEND (abfd, bfd_h_putx32, (val, ptr))
|
|
#define bfd_h_put_signed_32 \
|
|
bfd_h_put_32
|
|
#define bfd_h_get_32(abfd, ptr) \
|
|
BFD_SEND (abfd, bfd_h_getx32, (ptr))
|
|
#define bfd_h_get_signed_32(abfd, ptr) \
|
|
BFD_SEND (abfd, bfd_h_getx_signed_32, (ptr))
|
|
|
|
#define bfd_h_put_64(abfd, val, ptr) \
|
|
BFD_SEND (abfd, bfd_h_putx64, (val, ptr))
|
|
#define bfd_h_put_signed_64 \
|
|
bfd_h_put_64
|
|
#define bfd_h_get_64(abfd, ptr) \
|
|
BFD_SEND (abfd, bfd_h_getx64, (ptr))
|
|
#define bfd_h_get_signed_64(abfd, ptr) \
|
|
BFD_SEND (abfd, bfd_h_getx_signed_64, (ptr))
|
|
|
|
/* Aliases for the above, which should eventually go away. */
|
|
|
|
#define H_PUT_64 bfd_h_put_64
|
|
#define H_PUT_32 bfd_h_put_32
|
|
#define H_PUT_16 bfd_h_put_16
|
|
#define H_PUT_8 bfd_h_put_8
|
|
#define H_PUT_S64 bfd_h_put_signed_64
|
|
#define H_PUT_S32 bfd_h_put_signed_32
|
|
#define H_PUT_S16 bfd_h_put_signed_16
|
|
#define H_PUT_S8 bfd_h_put_signed_8
|
|
#define H_GET_64 bfd_h_get_64
|
|
#define H_GET_32 bfd_h_get_32
|
|
#define H_GET_16 bfd_h_get_16
|
|
#define H_GET_8 bfd_h_get_8
|
|
#define H_GET_S64 bfd_h_get_signed_64
|
|
#define H_GET_S32 bfd_h_get_signed_32
|
|
#define H_GET_S16 bfd_h_get_signed_16
|
|
#define H_GET_S8 bfd_h_get_signed_8
|
|
|
|
|
|
</pre>
|
|
<p><a name="index-bfd_005flog2-1363"></a>
|
|
|
|
<h5 class="subsubsection">2.15.1.5 <code>bfd_log2</code></h5>
|
|
|
|
<p><strong>Synopsis</strong>
|
|
<pre class="example"> unsigned int bfd_log2 (bfd_vma x);
|
|
</pre>
|
|
<p><strong>Description</strong><br>
|
|
Return the log base 2 of the value supplied, rounded up. E.g., an
|
|
<var>x</var> of 1025 returns 11. A <var>x</var> of 0 returns 0.
|
|
|
|
</body></html>
|
|
|