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<h1>sym.c</h1><div class="fragment"><pre class="fragment">00001 <span class="preprocessor">#ifndef _SYM_C_ </span><span class="comment">/* -*- linux-c -*- */</span>
00002 <span class="preprocessor">#define _SYM_C_</span>
00003 <span class="preprocessor"></span>
00004 <span class="preprocessor">#include "<a class="code" href="string_8c.html">string.c</a>"</span>
00005 <span class="comment"></span>
00006 <span class="comment">/** @file sym.c</span>
00007 <span class="comment"> * @addtogroup sym Symbolic Functions</span>
00008 <span class="comment"> * Symbolic Lookup Functions</span>
00009 <span class="comment"> * @{</span>
00010 <span class="comment"> */</span>
00011 <span class="comment"></span>
00012 <span class="comment">/** Lookup symbol.</span>
00013 <span class="comment"> * This simply calls the kernel function kallsyms_lookup().</span>
00014 <span class="comment"> * That function is not exported, so this workaround is required.</span>
00015 <span class="comment"> * See the kernel source, kernel/kallsyms.c for more information.</span>
00016 <span class="comment"> */</span>
00017 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> * (*_stp_kallsyms_lookup)(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> addr,
00018 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> *symbolsize,
00019 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> *offset,
00020 <span class="keywordtype">char</span> **modname, <span class="keywordtype">char</span> *namebuf)=(<span class="keywordtype">void</span> *)KALLSYMS_LOOKUP;
00021
00022 <span class="comment"></span>
00023 <span class="comment">/** Write addresses symbolically into a String</span>
00024 <span class="comment"> * @param str String</span>
00025 <span class="comment"> * @param address The address to lookup.</span>
00026 <span class="comment"> * @note Symbolic lookups should not normally be done within</span>
00027 <span class="comment"> * a probe because it is too time-consuming. Use at module exit time.</span>
00028 <span class="comment"> */</span>
00029
<a name="l00030"></a><a class="code" href="group__sym.html#ga1">00030</a> String <a class="code" href="group__sym.html#ga1">_stp_symbol_sprint</a> (String str, <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> address)
00031 {
00032 <span class="keywordtype">char</span> *modname;
00033 <span class="keyword">const</span> <span class="keywordtype">char</span> *name;
00034 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> offset, size;
00035 <span class="keywordtype">char</span> namebuf[KSYM_NAME_LEN+1];
00036
00037 name = _stp_kallsyms_lookup(address, &size, &offset, &modname, namebuf);
00038
00039 <a class="code" href="group__string.html#ga3">_stp_sprintf</a> (str, <span class="stringliteral">"0x%lx : "</span>, address);
00040 <span class="keywordflow">if</span> (modname)
00041 <a class="code" href="group__string.html#ga3">_stp_sprintf</a> (str, <span class="stringliteral">"%s+%#lx/%#lx [%s]"</span>, name, offset, size, modname);
00042 <span class="keywordflow">else</span>
00043 <a class="code" href="group__string.html#ga3">_stp_sprintf</a> (str, <span class="stringliteral">"%s+%#lx/%#lx"</span>, name, offset, size);
00044 <span class="keywordflow">return</span> str;
00045 }
00046
00047 <span class="comment"></span>
00048 <span class="comment">/** Print addresses symbolically to the print buffer.</span>
00049 <span class="comment"> * @param address The address to lookup.</span>
00050 <span class="comment"> * @note Symbolic lookups should not normally be done within</span>
00051 <span class="comment"> * a probe because it is too time-consuming. Use at module exit time.</span>
00052 <span class="comment"> */</span>
00053
<a name="l00054"></a><a class="code" href="group__sym.html#ga2">00054</a> <span class="keywordtype">void</span> <a class="code" href="group__sym.html#ga2">_stp_symbol_print</a> (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> address)
00055 {
00056 <span class="keywordtype">char</span> *modname;
00057 <span class="keyword">const</span> <span class="keywordtype">char</span> *name;
00058 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> offset, size;
00059 <span class="keywordtype">char</span> namebuf[KSYM_NAME_LEN+1];
00060
00061 name = _stp_kallsyms_lookup(address, &size, &offset, &modname, namebuf);
00062
00063 <a class="code" href="group__print.html#ga3">_stp_printf</a> (<span class="stringliteral">"0x%lx : "</span>, address);
00064 <span class="keywordflow">if</span> (modname)
00065 <a class="code" href="group__print.html#ga3">_stp_printf</a> (<span class="stringliteral">"%s+%#lx/%#lx [%s]"</span>, name, offset, size, modname);
00066 <span class="keywordflow">else</span>
00067 <a class="code" href="group__print.html#ga3">_stp_printf</a> (<span class="stringliteral">"%s+%#lx/%#lx"</span>, name, offset, size);
00068 }
00069 <span class="comment"></span>
00070 <span class="comment">/** @} */</span>
00071 <span class="preprocessor">#endif </span><span class="comment">/* _SYM_C_ */</span>
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