aboutsummaryrefslogtreecommitdiffhomepage
path: root/print.html
diff options
context:
space:
mode:
authorjohannst <johannst@users.noreply.github.com>2022-03-15 17:05:22 +0000
committerjohannst <johannst@users.noreply.github.com>2022-03-15 17:05:22 +0000
commitbc55732c55a0c854f6e3c3cc40efd603907ecdcb (patch)
tree267813fb06d985e2047aa54224781740e965e130 /print.html
parent78b3836acf005c33ec4cdcb453f518b6e099c346 (diff)
downloadnotes-bc55732c55a0c854f6e3c3cc40efd603907ecdcb.tar.gz
notes-bc55732c55a0c854f6e3c3cc40efd603907ecdcb.zip
deploy: 33d74c3b33394769a2040ff451fbfdfd58e9bf92
Diffstat (limited to 'print.html')
-rw-r--r--print.html189
1 files changed, 185 insertions, 4 deletions
diff --git a/print.html b/print.html
index 9ce4124..074f644 100644
--- a/print.html
+++ b/print.html
@@ -83,7 +83,7 @@
<nav id="sidebar" class="sidebar" aria-label="Table of contents">
<div id="sidebar-scrollbox" class="sidebar-scrollbox">
- <ol class="chapter"><li class="expanded affix "><a href="intro.html">Introduction</a></li><li class="expanded "><a href="tools/index.html"><strong aria-hidden="true">1.</strong> Tools</a></li><li><ol class="section"><li class="expanded "><a href="tools/zsh.html"><strong aria-hidden="true">1.1.</strong> zsh</a></li><li class="expanded "><a href="tools/bash.html"><strong aria-hidden="true">1.2.</strong> bash</a></li><li class="expanded "><a href="tools/fish.html"><strong aria-hidden="true">1.3.</strong> fish</a></li><li class="expanded "><a href="tools/tmux.html"><strong aria-hidden="true">1.4.</strong> tmux</a></li><li class="expanded "><a href="tools/git.html"><strong aria-hidden="true">1.5.</strong> git</a></li><li class="expanded "><a href="tools/awk.html"><strong aria-hidden="true">1.6.</strong> awk</a></li><li class="expanded "><a href="tools/emacs.html"><strong aria-hidden="true">1.7.</strong> emacs</a></li><li class="expanded "><a href="tools/gpg.html"><strong aria-hidden="true">1.8.</strong> gpg</a></li><li class="expanded "><a href="tools/gdb.html"><strong aria-hidden="true">1.9.</strong> gdb</a></li><li class="expanded "><a href="tools/gdbserver.html"><strong aria-hidden="true">1.10.</strong> gdbserver</a></li><li class="expanded "><a href="tools/radare2.html"><strong aria-hidden="true">1.11.</strong> radare2</a></li><li class="expanded "><a href="tools/qemu.html"><strong aria-hidden="true">1.12.</strong> qemu</a></li><li class="expanded "><a href="tools/pacman.html"><strong aria-hidden="true">1.13.</strong> pacman</a></li></ol></li><li class="expanded "><a href="monitor/index.html"><strong aria-hidden="true">2.</strong> Resource analysis &amp; monitor</a></li><li><ol class="section"><li class="expanded "><a href="monitor/lsof.html"><strong aria-hidden="true">2.1.</strong> lsof</a></li><li class="expanded "><a href="monitor/ss.html"><strong aria-hidden="true">2.2.</strong> ss</a></li><li class="expanded "><a href="monitor/pidstat.html"><strong aria-hidden="true">2.3.</strong> pidstat</a></li><li class="expanded "><a href="monitor/pgrep.html"><strong aria-hidden="true">2.4.</strong> pgrep</a></li><li class="expanded "><a href="monitor/pmap.html"><strong aria-hidden="true">2.5.</strong> pmap</a></li><li class="expanded "><a href="monitor/pstack.html"><strong aria-hidden="true">2.6.</strong> pstack</a></li></ol></li><li class="expanded "><a href="trace_profile/index.html"><strong aria-hidden="true">3.</strong> Trace and Profile</a></li><li><ol class="section"><li class="expanded "><a href="trace_profile/strace.html"><strong aria-hidden="true">3.1.</strong> strace</a></li><li class="expanded "><a href="trace_profile/ltrace.html"><strong aria-hidden="true">3.2.</strong> ltrace</a></li><li class="expanded "><a href="trace_profile/perf.html"><strong aria-hidden="true">3.3.</strong> perf</a></li><li class="expanded "><a href="trace_profile/oprofile.html"><strong aria-hidden="true">3.4.</strong> OProfile</a></li><li class="expanded "><a href="trace_profile/time.html"><strong aria-hidden="true">3.5.</strong> time</a></li></ol></li><li class="expanded "><a href="binary/index.html"><strong aria-hidden="true">4.</strong> Binary</a></li><li><ol class="section"><li class="expanded "><a href="binary/od.html"><strong aria-hidden="true">4.1.</strong> od</a></li><li class="expanded "><a href="binary/xxd.html"><strong aria-hidden="true">4.2.</strong> xxd</a></li><li class="expanded "><a href="binary/readelf.html"><strong aria-hidden="true">4.3.</strong> readelf</a></li><li class="expanded "><a href="binary/objdump.html"><strong aria-hidden="true">4.4.</strong> objdump</a></li><li class="expanded "><a href="binary/nm.html"><strong aria-hidden="true">4.5.</strong> nm</a></li></ol></li><li class="expanded "><a href="development/index.html"><strong aria-hidden="true">5.</strong> Development</a></li><li><ol class="section"><li class="expanded "><a href="development/c++filt.html"><strong aria-hidden="true">5.1.</strong> c++filt</a></li><li class="expanded "><a href="development/c++.html"><strong aria-hidden="true">5.2.</strong> c++</a></li><li class="expanded "><a href="development/glibc.html"><strong aria-hidden="true">5.3.</strong> glibc</a></li><li class="expanded "><a href="development/gcc.html"><strong aria-hidden="true">5.4.</strong> gcc</a></li><li class="expanded "><a href="development/make.html"><strong aria-hidden="true">5.5.</strong> make</a></li><li class="expanded "><a href="development/ld.so.html"><strong aria-hidden="true">5.6.</strong> ld.so</a></li><li class="expanded "><a href="development/symbolver.html"><strong aria-hidden="true">5.7.</strong> symbol versioning</a></li><li class="expanded "><a href="development/python.html"><strong aria-hidden="true">5.8.</strong> python</a></li></ol></li><li class="expanded "><a href="arch/index.html"><strong aria-hidden="true">6.</strong> Arch</a></li><li><ol class="section"><li class="expanded "><a href="arch/x86_64.html"><strong aria-hidden="true">6.1.</strong> x86_64</a></li><li class="expanded "><a href="arch/arm64.html"><strong aria-hidden="true">6.2.</strong> arm64</a></li><li class="expanded "><a href="arch/armv7.html"><strong aria-hidden="true">6.3.</strong> armv7</a></li></ol></li></ol>
+ <ol class="chapter"><li class="expanded affix "><a href="intro.html">Introduction</a></li><li class="expanded "><a href="tools/index.html"><strong aria-hidden="true">1.</strong> Tools</a></li><li><ol class="section"><li class="expanded "><a href="tools/zsh.html"><strong aria-hidden="true">1.1.</strong> zsh</a></li><li class="expanded "><a href="tools/bash.html"><strong aria-hidden="true">1.2.</strong> bash</a></li><li class="expanded "><a href="tools/fish.html"><strong aria-hidden="true">1.3.</strong> fish</a></li><li class="expanded "><a href="tools/tmux.html"><strong aria-hidden="true">1.4.</strong> tmux</a></li><li class="expanded "><a href="tools/git.html"><strong aria-hidden="true">1.5.</strong> git</a></li><li class="expanded "><a href="tools/awk.html"><strong aria-hidden="true">1.6.</strong> awk</a></li><li class="expanded "><a href="tools/emacs.html"><strong aria-hidden="true">1.7.</strong> emacs</a></li><li class="expanded "><a href="tools/gpg.html"><strong aria-hidden="true">1.8.</strong> gpg</a></li><li class="expanded "><a href="tools/gdb.html"><strong aria-hidden="true">1.9.</strong> gdb</a></li><li class="expanded "><a href="tools/gdbserver.html"><strong aria-hidden="true">1.10.</strong> gdbserver</a></li><li class="expanded "><a href="tools/radare2.html"><strong aria-hidden="true">1.11.</strong> radare2</a></li><li class="expanded "><a href="tools/qemu.html"><strong aria-hidden="true">1.12.</strong> qemu</a></li><li class="expanded "><a href="tools/pacman.html"><strong aria-hidden="true">1.13.</strong> pacman</a></li></ol></li><li class="expanded "><a href="monitor/index.html"><strong aria-hidden="true">2.</strong> Resource analysis &amp; monitor</a></li><li><ol class="section"><li class="expanded "><a href="monitor/lsof.html"><strong aria-hidden="true">2.1.</strong> lsof</a></li><li class="expanded "><a href="monitor/ss.html"><strong aria-hidden="true">2.2.</strong> ss</a></li><li class="expanded "><a href="monitor/pidstat.html"><strong aria-hidden="true">2.3.</strong> pidstat</a></li><li class="expanded "><a href="monitor/pgrep.html"><strong aria-hidden="true">2.4.</strong> pgrep</a></li><li class="expanded "><a href="monitor/pmap.html"><strong aria-hidden="true">2.5.</strong> pmap</a></li><li class="expanded "><a href="monitor/pstack.html"><strong aria-hidden="true">2.6.</strong> pstack</a></li></ol></li><li class="expanded "><a href="trace_profile/index.html"><strong aria-hidden="true">3.</strong> Trace and Profile</a></li><li><ol class="section"><li class="expanded "><a href="trace_profile/strace.html"><strong aria-hidden="true">3.1.</strong> strace</a></li><li class="expanded "><a href="trace_profile/ltrace.html"><strong aria-hidden="true">3.2.</strong> ltrace</a></li><li class="expanded "><a href="trace_profile/perf.html"><strong aria-hidden="true">3.3.</strong> perf</a></li><li class="expanded "><a href="trace_profile/oprofile.html"><strong aria-hidden="true">3.4.</strong> OProfile</a></li><li class="expanded "><a href="trace_profile/time.html"><strong aria-hidden="true">3.5.</strong> time</a></li></ol></li><li class="expanded "><a href="binary/index.html"><strong aria-hidden="true">4.</strong> Binary</a></li><li><ol class="section"><li class="expanded "><a href="binary/od.html"><strong aria-hidden="true">4.1.</strong> od</a></li><li class="expanded "><a href="binary/xxd.html"><strong aria-hidden="true">4.2.</strong> xxd</a></li><li class="expanded "><a href="binary/readelf.html"><strong aria-hidden="true">4.3.</strong> readelf</a></li><li class="expanded "><a href="binary/objdump.html"><strong aria-hidden="true">4.4.</strong> objdump</a></li><li class="expanded "><a href="binary/nm.html"><strong aria-hidden="true">4.5.</strong> nm</a></li></ol></li><li class="expanded "><a href="development/index.html"><strong aria-hidden="true">5.</strong> Development</a></li><li><ol class="section"><li class="expanded "><a href="development/c++filt.html"><strong aria-hidden="true">5.1.</strong> c++filt</a></li><li class="expanded "><a href="development/c++.html"><strong aria-hidden="true">5.2.</strong> c++</a></li><li class="expanded "><a href="development/glibc.html"><strong aria-hidden="true">5.3.</strong> glibc</a></li><li class="expanded "><a href="development/gcc.html"><strong aria-hidden="true">5.4.</strong> gcc</a></li><li class="expanded "><a href="development/make.html"><strong aria-hidden="true">5.5.</strong> make</a></li><li class="expanded "><a href="development/ld.so.html"><strong aria-hidden="true">5.6.</strong> ld.so</a></li><li class="expanded "><a href="development/symbolver.html"><strong aria-hidden="true">5.7.</strong> symbol versioning</a></li><li class="expanded "><a href="development/python.html"><strong aria-hidden="true">5.8.</strong> python</a></li></ol></li><li class="expanded "><a href="linux/index.html"><strong aria-hidden="true">6.</strong> Linux</a></li><li><ol class="section"><li class="expanded "><a href="linux/systemd.html"><strong aria-hidden="true">6.1.</strong> systemd</a></li><li class="expanded "><a href="linux/coredump.html"><strong aria-hidden="true">6.2.</strong> coredump</a></li><li class="expanded "><a href="linux/ptrace_scope.html"><strong aria-hidden="true">6.3.</strong> ptrace_scope</a></li></ol></li><li class="expanded "><a href="network/index.html"><strong aria-hidden="true">7.</strong> Network</a></li><li><ol class="section"><li class="expanded "><a href="network/tcpdump.html"><strong aria-hidden="true">7.1.</strong> tcpdump</a></li></ol></li><li class="expanded "><a href="arch/index.html"><strong aria-hidden="true">8.</strong> Arch</a></li><li><ol class="section"><li class="expanded "><a href="arch/x86_64.html"><strong aria-hidden="true">8.1.</strong> x86_64</a></li><li class="expanded "><a href="arch/arm64.html"><strong aria-hidden="true">8.2.</strong> arm64</a></li><li class="expanded "><a href="arch/armv7.html"><strong aria-hidden="true">8.3.</strong> armv7</a></li></ol></li></ol>
</div>
<div id="sidebar-resize-handle" class="sidebar-resize-handle"></div>
</nav>
@@ -1384,6 +1384,7 @@ delkey delete selected subkey
</code></pre>
<h2><a class="header" href="#export--import-keys" id="export--import-keys">Export &amp; Import Keys</a></h2>
<pre><code class="language-bash">gpg --export --armor --output &lt;KEY.PUB&gt; &lt;KEY ID&gt;
+gpg --export-secret-key --armor --output &lt;KEY.PUB&gt; &lt;KEY ID&gt;
gpg --import &lt;FILE&gt;
</code></pre>
<h2><a class="header" href="#search--send-keys" id="search--send-keys">Search &amp; Send keys</a></h2>
@@ -2931,6 +2932,186 @@ def sum(a: int, b: int) -&gt; int:
<p>Micro benchmarking.</p>
<pre><code class="language-bash">python -m timeit '[x.strip() for x in [&quot;a &quot;, &quot; b&quot;]]'
</code></pre>
+<h1><a class="header" href="#linux" id="linux">Linux</a></h1>
+<ul>
+<li><a href="linux/./systemd.html">systemd</a></li>
+<li><a href="linux/./coredump.html">coredump</a></li>
+<li><a href="linux/./ptrace_scope.html">ptrace_scope</a></li>
+</ul>
+<h1><a class="header" href="#systemd" id="systemd">systemd</a></h1>
+<h2><a class="header" href="#systemctl" id="systemctl">systemctl</a></h2>
+<p>Inspect units:</p>
+<pre><code class="language-text">systemctl [opts] [cmd]
+[opts]
+ --user
+
+[cmd]
+ list-units &lt;pattern&gt; List units in memory
+
+ status &lt;unit&gt; Show runtime status of unit
+
+ start &lt;unit&gt; Start a unit
+ stop &lt;unit&gt; Stop a unit
+ restart &lt;unit&gt; Restart a unit
+ reload &lt;unit&gt; Reload a unit
+
+ enable &lt;unit&gt; Enable a unit (persistent)
+ disable &lt;unit&gt; Disable a unit
+
+ cat &lt;unit&gt; Print unit file
+ show &lt;unit&gt; Show properties of unit
+</code></pre>
+<h3><a class="header" href="#example-trivial-user-unit" id="example-trivial-user-unit">Example: Trivial user unit</a></h3>
+<pre><code class="language-bash"># Generate unit
+mkdir -p ~/.config/systemd/user
+echo '[Unit]
+Description=Test logger
+
+[Service]
+Type=oneshot
+ExecStart=logger &quot;Hello from test unit&quot;' &gt; ~/.config/systemd/user/test.service
+
+# Run unit
+systemctl --user start test
+
+# See log message
+journalctl --user -u test -n 5
+</code></pre>
+<h2><a class="header" href="#journalctl" id="journalctl">journalctl</a></h2>
+<p>Inspect journal logs:</p>
+<pre><code class="language-text">journalctl [opts] [matches]
+ --user Current user journal (system by default)
+ -u &lt;unit&gt; Show logs for specified &lt;unit&gt;
+ -n &lt;lines&gt; Show only last &lt;lines&gt;
+ -f Follow journal
+ -g &lt;pattern&gt; Grep for &lt;pattern&gt;
+</code></pre>
+<p>Cleanup:</p>
+<pre><code class="language-text">journalctl [opts]
+ --disk-usage Show current disk usage
+ --vacuum-size=&lt;size&gt; Reduce journal log to &lt;size&gt; (K/M/G)
+</code></pre>
+<h2><a class="header" href="#references-2" id="references-2">References</a></h2>
+<ul>
+<li><a href="https://www.man7.org/linux/man-pages/man5/systemd.unit.5.html">man systemd.unit(5)</a></li>
+<li><a href="https://www.man7.org/linux/man-pages/man5/systemd.service.5.html">man systemd.service(5)</a></li>
+</ul>
+<h1><a class="header" href="#core5" id="core5">core(5)</a></h1>
+<p>There are multiple requirements that must be satisfied that <code>coredumps</code> are
+being generated, a full list can be found in <a href="https://man7.org/linux/man-pages/man5/core.5.html">core(5)</a>.</p>
+<p>An important one is to configure the soft resource limit <code>RLMIT_CORE</code>
+(typically as unlimited during debugging).
+In a typical bash/zsh this can be done as</p>
+<pre><code class="language-bash">ulimit -Sc unlimited
+</code></pre>
+<h2><a class="header" href="#naming-of-coredump-files" id="naming-of-coredump-files">Naming of coredump files</a></h2>
+<p>There are two important kernel configs to control the naming:</p>
+<pre><code class="language-config">/proc/sys/kernel/core_pattern
+ &lt;pattern&gt; =&gt; Specifies a name pattern for the coredump file. This can
+ include certain FORMAT specifier.
+ |&lt;cmdline&gt; =&gt; Coredump is pipe through stdin to the user space process
+ specified by the cmdline, this can also contain FORMAT specifier.
+
+ FORMAT specifier (full list, see core(5)):
+ %E Pathname of the executable ('/' replaced by '!').
+ %p PID of the dumping process in its pid namespace.
+ %P PID of the dumping process in the initial pid namespace.
+ %u Real UID of dumping process.
+ %s Signal number causing the dump.
+
+
+/proc/sys/kernel/core_uses_pid
+ 1 =&gt; Append &quot;.&lt;pid&gt;&quot; suffic to the coredump file name
+ (pid of the dumping process).
+ 0 =&gt; Do not append the suffix.
+</code></pre>
+<h2><a class="header" href="#control-which-segments-are-dumped" id="control-which-segments-are-dumped">Control which segments are dumped</a></h2>
+<p>Each process has a coredump filter defined in <code>/proc/&lt;pid&gt;/coredump_filter</code>
+which specifies which memory segments are being dumped.
+Filters are preseved across <code>fork/exec</code> calls and hence child processes inherit
+the parents filters.</p>
+<p>The filter is a bitmask where <code>1</code> indicates to dump the given type.</p>
+<pre><code>From core(5):
+ bit 0 Dump anonymous private mappings.
+ bit 1 Dump anonymous shared mappings.
+ bit 2 Dump file-backed private mappings.
+ bit 3 Dump file-backed shared mappings.
+ bit 4 Dump ELF headers.
+ bit 5 Dump private huge pages.
+ bit 6 Dump shared huge pages.
+ bit 7 Dump private DAX pages.
+ bit 8 Dump shared DAX pages.
+
+Default filter 0x33.
+</code></pre>
+<h1><a class="header" href="#some-examples-out-there" id="some-examples-out-there">Some examples out there</a></h1>
+<h2><a class="header" href="#coredumpctl-systemd" id="coredumpctl-systemd">coredumpctl (systemd)</a></h2>
+<pre><code class="language-bash"># List available coredumps.
+coredumpctl list
+ TIME PID UID GID SIG COREFILE EXE SIZE
+ ...
+ Fri 2022-03-11 12:10:48 CET 6363 1000 1000 SIGSEGV present /usr/bin/sleep 18.1K
+
+# Get detailed info on specific coredump.
+coredumpctl info 6363
+
+# Debug specific coredump.
+coredumpctl debug 6363
+
+# Dump specific coredump to file.
+coredumpctl dump 6363 -o &lt;file&gt;
+</code></pre>
+<h2><a class="header" href="#apport-ubuntu" id="apport-ubuntu">apport (ubuntu)</a></h2>
+<p>Known crash report locations:</p>
+<ul>
+<li><code>/var/crash</code></li>
+</ul>
+<p>To get to the raw coredump, crash reports can be unpacked as:</p>
+<pre><code class="language-bash">apport-unpack &lt;crash_repot&gt; &lt;dest_dir&gt;
+</code></pre>
+<p>The coredump resides under <code>&lt;dest_dir&gt;/CoreDump</code>.</p>
+<h1><a class="header" href="#ptrace_scope" id="ptrace_scope">ptrace_scope</a></h1>
+<p>In case the kernel was compiled with the <code>yama</code> security module
+(<code>CONFIG_SECURITY_YAMA</code>), tracing processes with <code>ptrace(2)</code> can be restricted.</p>
+<pre><code class="language-config">/proc/sys/kernel/yama/ptrace_scope
+ 0 =&gt; No restrictions.
+ 1 =&gt; Restricted attach, only the following can attach
+ - A process in the parent hierarchy.
+ - A process with CAP_SYS_PTRACE.
+ - A process with the PID that the tracee allowed by via
+ PR_SET_PTRACER.
+ 2 =&gt; Only processes with CAP_SYS_PTRACE in the user namespace of the tracee
+ can attach.
+ 3 =&gt; No tracing allowed.
+</code></pre>
+<p>Further details in <a href="https://man7.org/linux/man-pages/man2/ptrace.2.html"><code>ptrace(2)</code></a>.</p>
+<h1><a class="header" href="#network-1" id="network-1">Network</a></h1>
+<ul>
+<li><a href="network/./tcpdump.html">tcpdump</a></li>
+</ul>
+<h1><a class="header" href="#tcpdump1" id="tcpdump1">tcpdump(1)</a></h1>
+<h1><a class="header" href="#cli-3" id="cli-3">CLI</a></h1>
+<pre><code class="language-markdown">tcpdump [opts] -i &lt;if&gt; [&lt;filter&gt;]
+ -n Don't covert host/port names.
+ -w &lt;file|-&gt; Write pcap trace to file or stdout (-).
+ -r &lt;file&gt; Read &amp; parse pcap file.
+</code></pre>
+<p>Some useful filters.</p>
+<pre><code class="language-markdown">src &lt;ip&gt; Filter for source IP.
+dst &lt;ip&gt; Filter for destination IP.
+host &lt;ip&gt; Filter for IP (src + dst).
+net &lt;ip&gt;/&lt;range&gt; Filter traffic on subnet.
+[src/dst] port &lt;port&gt; Filter for port (optionally src/dst).
+tcp/udp/icmp Filter for protocol.
+</code></pre>
+<blockquote>
+<p>Use <code>and/or/not</code> and <code>()</code> to build filter expressions.</p>
+</blockquote>
+<h1><a class="header" href="#examples-5" id="examples-5">Examples</a></h1>
+<h2><a class="header" href="#capture-packets-from-remote-host" id="capture-packets-from-remote-host">Capture packets from remote host</a></h2>
+<pre><code class="language-makrdown"># -k: Start capturing immediately.
+ssh &lt;host&gt; tcpdump -i &lt;IF&gt; -w - | sudo wireshark -k -i -
+</code></pre>
<h1><a class="header" href="#arch" id="arch">Arch</a></h1>
<ul>
<li><a href="arch/./x86_64.html">x86_64</a></li>
@@ -3190,7 +3371,7 @@ greeting_len:
<pre><code class="language-bash">&gt; gcc -o greet greet.s -nostartfiles -nostdlib &amp;&amp; ./greet
Hi ASM-World!
</code></pre>
-<h2><a class="header" href="#references-2" id="references-2">References</a></h2>
+<h2><a class="header" href="#references-3" id="references-3">References</a></h2>
<ul>
<li><a href="https://www.uclibc.org/docs/psABI-x86_64.pdf">SystemV AMD64 ABI</a></li>
<li><a href="https://www.amd.com/system/files/TechDocs/24592.pdf">AMD64 Vol1: Application Programming</a></li>
@@ -3419,7 +3600,7 @@ Hi ASM-World!
distributions. Explicitly specifying the dynamic linker should not be
required when compiling natively on arm64.</p>
</blockquote>
-<h2><a class="header" href="#references-3" id="references-3">References</a></h2>
+<h2><a class="header" href="#references-4" id="references-4">References</a></h2>
<ul>
<li><a href="https://github.com/ARM-software/abi-aa/blob/master/aapcs64/aapcs64.rst">Procedure Call Standard ARM64</a></li>
<li><a href="https://developer.arm.com/documentation/den0024/latest">ARMv8-A Programmer's Guide</a></li>
@@ -3663,7 +3844,7 @@ Hi ASM-World!
distributions. Explicitly specifying the dynamic linker should not be
required when compiling natively on arm.</p>
</blockquote>
-<h2><a class="header" href="#references-4" id="references-4">References</a></h2>
+<h2><a class="header" href="#references-5" id="references-5">References</a></h2>
<ul>
<li><a href="https://github.com/ARM-software/abi-aa/blob/master/aapcs32/aapcs32.rst">Procedure Call Standard ARM</a></li>
<li><a href="https://developer.arm.com/documentation/den0013/latest">ARMv7-A Programmer's Guide</a></li>