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<title>SystemTap: SystemTap Runtime Library</title>
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<div class="qindex"><a class="qindex" href="index.html">Intro</a> | <a class="qindex" href="globals_func.html">Functions</a> | <a class="qindex" href="globals_defs.html">Defines</a> | <a class="qindex" href="globals_enum.html">Enumerations</a> | <a class="qindex" href="globals_eval.html">Enumeration Values</a></div>
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<h1>probes.c</h1><a href="probes_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="comment">/* -*- linux-c -*- */</span>
00002
00012 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> long (*_stp_lookup_name)(<span class="keywordtype">char</span> *name)=(<span class="keywordtype">void</span> *)KALLSYMS_LOOKUP_NAME;
00013
<a name="l00014"></a><a class="code" href="probes_8c.html#a1">00014</a> <span class="keywordtype">void</span> <a class="code" href="probes_8c.html#a1">_stp_unregister_jprobes</a> (<span class="keyword">struct</span> jprobe *probes, <span class="keywordtype">int</span> num_probes)
00015 {
00016 <span class="keywordtype">int</span> i;
00017 <span class="keywordflow">for</span> (i = 0; i < num_probes; i++)
00018 unregister_jprobe(&probes[i]);
00019 <a class="code" href="io_8c.html#a4">dlog</a> (<span class="stringliteral">"All jprobes removed\n"</span>);
00020 }
00021
<a name="l00022"></a><a class="code" href="probes_8c.html#a2">00022</a> <span class="keywordtype">int</span> <a class="code" href="probes_8c.html#a2">_stp_register_jprobes</a> (<span class="keyword">struct</span> jprobe *probes, <span class="keywordtype">int</span> num_probes)
00023 {
00024 <span class="keywordtype">int</span> i, ret ;
00025 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> addr;
00026
00027 <span class="keywordflow">for</span> (i = 0; i < num_probes; i++) {
00028 addr =_stp_lookup_name((<span class="keywordtype">char</span> *)probes[i].kp.addr);
00029 <span class="keywordflow">if</span> (addr == 0) {
00030 <a class="code" href="io_8c.html#a4">dlog</a> (<span class="stringliteral">"ERROR: function %s not found!\n"</span>,
00031 (<span class="keywordtype">char</span> *)probes[i].kp.addr);
00032 ret = -1; <span class="comment">/* FIXME */</span>
00033 <span class="keywordflow">goto</span> out;
00034 }
00035 <a class="code" href="io_8c.html#a4">dlog</a>(<span class="stringliteral">"inserting jprobe at %s (%p)\n"</span>, probes[i].kp.addr, addr);
00036 probes[i].kp.addr = (kprobe_opcode_t *)addr;
00037 ret = register_jprobe(&probes[i]);
00038 <span class="keywordflow">if</span> (ret)
00039 <span class="keywordflow">goto</span> out;
00040 }
00041 <span class="keywordflow">return</span> 0;
00042 out:
00043 <a class="code" href="io_8c.html#a4">dlog</a> (<span class="stringliteral">"probe module initialization failed. Exiting...\n"</span>);
00044 <a class="code" href="probes_8c.html#a1">_stp_unregister_jprobes</a>(probes, i);
00045 <span class="keywordflow">return</span> ret;
00046 }
00047
<a name="l00048"></a><a class="code" href="probes_8c.html#a3">00048</a> <span class="keywordtype">void</span> <a class="code" href="probes_8c.html#a3">_stp_unregister_kprobes</a> (<span class="keyword">struct</span> kprobe *probes, <span class="keywordtype">int</span> num_probes)
00049 {
00050 <span class="keywordtype">int</span> i;
00051 <span class="keywordflow">for</span> (i = 0; i < num_probes; i++)
00052 unregister_kprobe(&probes[i]);
00053 <a class="code" href="io_8c.html#a4">dlog</a> (<span class="stringliteral">"All kprobes removed\n"</span>);
00054 }
00055
<a name="l00056"></a><a class="code" href="probes_8c.html#a4">00056</a> <span class="keywordtype">int</span> <a class="code" href="probes_8c.html#a4">_stp_register_kprobes</a> (<span class="keyword">struct</span> kprobe *probes, <span class="keywordtype">int</span> num_probes)
00057 {
00058 <span class="keywordtype">int</span> i, ret ;
00059 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> addr;
00060
00061 <span class="keywordflow">for</span> (i = 0; i < num_probes; i++) {
00062 addr =_stp_lookup_name((<span class="keywordtype">char</span> *)probes[i].addr);
00063 <span class="keywordflow">if</span> (addr == 0) {
00064 <a class="code" href="io_8c.html#a4">dlog</a> (<span class="stringliteral">"ERROR: function %s not found!\n"</span>,
00065 (<span class="keywordtype">char</span> *)probes[i].addr);
00066 ret = -1; <span class="comment">/* FIXME */</span>
00067 <span class="keywordflow">goto</span> out;
00068 }
00069 <a class="code" href="io_8c.html#a4">dlog</a>(<span class="stringliteral">"inserting kprobe at %s (%p)\n"</span>, probes[i].addr, addr);
00070 probes[i].addr = (kprobe_opcode_t *)addr;
00071 ret = register_kprobe(&probes[i]);
00072 <span class="keywordflow">if</span> (ret)
00073 <span class="keywordflow">goto</span> out;
00074 }
00075 <span class="keywordflow">return</span> 0;
00076 out:
00077 <a class="code" href="io_8c.html#a4">dlog</a> (<span class="stringliteral">"probe module initialization failed. Exiting...\n"</span>);
00078 <a class="code" href="probes_8c.html#a3">_stp_unregister_kprobes</a>(probes, i);
00079 <span class="keywordflow">return</span> ret;
00080 }
00081
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