diff options
Diffstat (limited to 'od.html')
| -rw-r--r-- | od.html | 14 |
1 files changed, 10 insertions, 4 deletions
@@ -81,7 +81,7 @@ <nav id="sidebar" class="sidebar" aria-label="Table of contents"> <div id="sidebar-scrollbox" class="sidebar-scrollbox"> - <ol class="chapter"><li class="expanded "><a href="ld.so.html"><strong aria-hidden="true">1.</strong> ld.so</a></li><li class="expanded "><a href="git.html"><strong aria-hidden="true">2.</strong> git</a></li><li class="expanded "><a href="gdb.html"><strong aria-hidden="true">3.</strong> gdb</a></li><li class="expanded "><a href="radare2.html"><strong aria-hidden="true">4.</strong> radare2</a></li><li class="expanded "><a href="emacs.html"><strong aria-hidden="true">5.</strong> emacs</a></li><li class="expanded "><a href="fish.html"><strong aria-hidden="true">6.</strong> fish</a></li><li class="expanded "><a href="strace.html"><strong aria-hidden="true">7.</strong> strace</a></li><li class="expanded "><a href="lsof.html"><strong aria-hidden="true">8.</strong> lsof</a></li><li class="expanded "><a href="pidstat.html"><strong aria-hidden="true">9.</strong> pidstat</a></li><li class="expanded "><a href="time.html"><strong aria-hidden="true">10.</strong> time</a></li><li class="expanded "><a href="pmap.html"><strong aria-hidden="true">11.</strong> pmap</a></li><li class="expanded "><a href="pstack.html"><strong aria-hidden="true">12.</strong> pstack</a></li><li class="expanded "><a href="perf.html"><strong aria-hidden="true">13.</strong> perf</a></li><li class="expanded "><a href="oprofile.html"><strong aria-hidden="true">14.</strong> OProfile</a></li><li class="expanded "><a href="od.html" class="active"><strong aria-hidden="true">15.</strong> od</a></li><li class="expanded "><a href="xxd.html"><strong aria-hidden="true">16.</strong> xxd</a></li><li class="expanded "><a href="readelf.html"><strong aria-hidden="true">17.</strong> readelf</a></li><li class="expanded "><a href="objdump.html"><strong aria-hidden="true">18.</strong> objdump</a></li><li class="expanded "><a href="nm.html"><strong aria-hidden="true">19.</strong> nm</a></li><li class="expanded "><a href="c++filt.html"><strong aria-hidden="true">20.</strong> c++filt</a></li></ol> + <ol class="chapter"><li class="expanded "><a href="ld.so.html"><strong aria-hidden="true">1.</strong> ld.so</a></li><li class="expanded "><a href="git.html"><strong aria-hidden="true">2.</strong> git</a></li><li class="expanded "><a href="awk.html"><strong aria-hidden="true">3.</strong> awk</a></li><li class="expanded "><a href="gdb.html"><strong aria-hidden="true">4.</strong> gdb</a></li><li class="expanded "><a href="radare2.html"><strong aria-hidden="true">5.</strong> radare2</a></li><li class="expanded "><a href="emacs.html"><strong aria-hidden="true">6.</strong> emacs</a></li><li class="expanded "><a href="fish.html"><strong aria-hidden="true">7.</strong> fish</a></li><li class="expanded "><a href="strace.html"><strong aria-hidden="true">8.</strong> strace</a></li><li class="expanded "><a href="lsof.html"><strong aria-hidden="true">9.</strong> lsof</a></li><li class="expanded "><a href="pidstat.html"><strong aria-hidden="true">10.</strong> pidstat</a></li><li class="expanded "><a href="time.html"><strong aria-hidden="true">11.</strong> time</a></li><li class="expanded "><a href="pgrep.html"><strong aria-hidden="true">12.</strong> pgrep</a></li><li class="expanded "><a href="pstack.html"><strong aria-hidden="true">13.</strong> pstack</a></li><li class="expanded "><a href="pstack.html"><strong aria-hidden="true">14.</strong> pstack</a></li><li class="expanded "><a href="perf.html"><strong aria-hidden="true">15.</strong> perf</a></li><li class="expanded "><a href="oprofile.html"><strong aria-hidden="true">16.</strong> OProfile</a></li><li class="expanded "><a href="od.html" class="active"><strong aria-hidden="true">17.</strong> od</a></li><li class="expanded "><a href="xxd.html"><strong aria-hidden="true">18.</strong> xxd</a></li><li class="expanded "><a href="readelf.html"><strong aria-hidden="true">19.</strong> readelf</a></li><li class="expanded "><a href="objdump.html"><strong aria-hidden="true">20.</strong> objdump</a></li><li class="expanded "><a href="nm.html"><strong aria-hidden="true">21.</strong> nm</a></li><li class="expanded "><a href="c++filt.html"><strong aria-hidden="true">22.</strong> c++filt</a></li></ol> </div> <div id="sidebar-resize-handle" class="sidebar-resize-handle"></div> </nav> @@ -158,7 +158,7 @@ -j <n> skip <n> bytes from <file> (hex if start with 0x) -N <n> dump <n> bytes (hex of start with 0x) </code></pre> -<h2><a class="header" href="#ascii-chars-to-hex-string" id="ascii-chars-to-hex-string">ascii chars to hex string</a></h2> +<h2><a class="header" href="#ascii-to-hex-string" id="ascii-to-hex-string">ASCII to hex string</a></h2> <pre><code class="language-markdown"> echo -n AAAABBBB | od -An -w4 -tx4 >> 41414141 >> 42424242 @@ -168,13 +168,18 @@ >> del E L F nl # ta >> 177 E L F \n # tc </code></pre> -<h2><a class="header" href="#extract-part-of-file-eg-rodata-section-form-elf" id="extract-part-of-file-eg-rodata-section-form-elf">extract part of file (eg .rodata section form ELF)</a></h2> +<h2><a class="header" href="#extract-parts-of-file" id="extract-parts-of-file">Extract parts of file</a></h2> +<p>For example <code>.rodata</code> section from an elf file. We can use <code>readelf</code> to get the +offset into the file where the <code>.rodata</code> section starts.</p> <pre><code class="language-markdown"> readelf -W -S foo >> Section Headers: >> [Nr] Name Type Address Off Size ES Flg Lk Inf Al >> ... >> [15] .rodata PROGBITS 00000000004009c0 0009c0 000030 00 A 0 0 16 - od -j 0x0009c0 -N 0x30 -tx4 -w4 foo +</code></pre> +<p>With the offset of <code>-j 0x0009c0</code> we can dump <code>-N 0x30</code> bytes from the beginning of +the <code>.rodata</code> section as follows:</p> +<pre><code class="language-markdown"> od -j 0x0009c0 -N 0x30 -tx4 -w4 foo >> 0004700 00020001 >> 0004704 00000000 >> * @@ -183,6 +188,7 @@ >> 0004750 00000003 >> 0004754 00000004 </code></pre> +<p><strong>Note</strong>: Numbers starting with <code>0x</code> will be interpreted as hex by <code>od</code>.</p> </main> |