📄 signal.c
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<!doctype html public "-//W3C//DTD HTML 3.2//EN"><html><head><title>Linux/kernel/signal.c</title><meta http-equiv=Content-Type content="text/html; charset=gb2312"><base href="http://oldlinux.org/lxr/http/"></head><body bgcolor=white><div align=center> [<b><i>源代码浏览</i></b>] [<a href="diff/kernel/signal.c">区别标定</a>] [<a href="ident">标识符搜索</a>] [<a href="search">文本搜索</a>] [<a href="find">文件搜索</a>]</div><h1 align=center> <a href="http:/"> OldLinux</a> <a href="http:blurb.html"> 交叉引用</a><br> <a href="source/">Linux</a>/<a href="source/kernel/">kernel</a>/<a href="source/kernel/signal.c">signal.c</a></h1><div align=center> <b>版本:</b> [<a href="source/kernel/signal.c?v=1.0">1.0</a>] [<a href="source/kernel/signal.c?v=0.99.11">0.99.11</a>] [<a href="source/kernel/signal.c?v=0.99">0.99</a>] [<a href="source/kernel/signal.c?v=0.97">0.97</a>] [<a href="source/kernel/signal.c?v=0.96a">0.96a</a>] [<a href="source/kernel/signal.c?v=0.95">0.95</a>] [<a href="source/kernel/signal.c?v=0.12">0.12</a>] [<b><i>0.11</i></b>] [<a href="source/kernel/signal.c?v=0.01">0.01</a>] <br> <b>体系结构:</b> [<b><i>i386</i></b>] <br></div><hr><pre> <a name=L1 href="source/kernel/signal.c#L1">1</a> <b><i>/*</i></b> <a name=L2 href="source/kernel/signal.c#L2">2</a> <b><i> * linux/kernel/signal.c</i></b> <a name=L3 href="source/kernel/signal.c#L3">3</a> <b><i> *</i></b> <a name=L4 href="source/kernel/signal.c#L4">4</a> <b><i> * (C) 1991 Linus Torvalds</i></b> <a name=L5 href="source/kernel/signal.c#L5">5</a> <b><i> */</i></b> <a name=L6 href="source/kernel/signal.c#L6">6</a> <a name=L7 href="source/kernel/signal.c#L7">7</a> #include <linux/sched.h> <a name=L8 href="source/kernel/signal.c#L8">8</a> #include <linux/kernel.h> <a name=L9 href="source/kernel/signal.c#L9">9</a> #include <asm/segment.h> <a name=L10 href="source/kernel/signal.c#L10">10</a> <a name=L11 href="source/kernel/signal.c#L11">11</a> #include <signal.h> <a name=L12 href="source/kernel/signal.c#L12">12</a> <a name=L13 href="source/kernel/signal.c#L13">13</a> volatile void <a href="ident?i=do_exit">do_exit</a>(int error_code); <a name=L14 href="source/kernel/signal.c#L14">14</a> <a name=L15 href="source/kernel/signal.c#L15">15</a> int <a href="ident?i=sys_sgetmask">sys_sgetmask</a>() <a name=L16 href="source/kernel/signal.c#L16">16</a> { <a name=L17 href="source/kernel/signal.c#L17">17</a> return <a href="ident?i=current">current</a>->blocked; <a name=L18 href="source/kernel/signal.c#L18">18</a> } <a name=L19 href="source/kernel/signal.c#L19">19</a> <a name=L20 href="source/kernel/signal.c#L20">20</a> int <a href="ident?i=sys_ssetmask">sys_ssetmask</a>(int newmask) <a name=L21 href="source/kernel/signal.c#L21">21</a> { <a name=L22 href="source/kernel/signal.c#L22">22</a> int old=<a href="ident?i=current">current</a>->blocked; <a name=L23 href="source/kernel/signal.c#L23">23</a> <a name=L24 href="source/kernel/signal.c#L24">24</a> <a href="ident?i=current">current</a>->blocked = newmask & ~(1<<(<a href="ident?i=SIGKILL">SIGKILL</a>-1)); <a name=L25 href="source/kernel/signal.c#L25">25</a> return old; <a name=L26 href="source/kernel/signal.c#L26">26</a> } <a name=L27 href="source/kernel/signal.c#L27">27</a> <a name=L28 href="source/kernel/signal.c#L28">28</a> static inline void <a href="ident?i=save_old">save_old</a>(char * from,char * to) <a name=L29 href="source/kernel/signal.c#L29">29</a> { <a name=L30 href="source/kernel/signal.c#L30">30</a> int i; <a name=L31 href="source/kernel/signal.c#L31">31</a> <a name=L32 href="source/kernel/signal.c#L32">32</a> <a href="ident?i=verify_area">verify_area</a>(to, sizeof(struct <a href="ident?i=sigaction">sigaction</a>)); <a name=L33 href="source/kernel/signal.c#L33">33</a> for (i=0 ; i< sizeof(struct <a href="ident?i=sigaction">sigaction</a>) ; i++) { <a name=L34 href="source/kernel/signal.c#L34">34</a> <a href="ident?i=put_fs_byte">put_fs_byte</a>(*from,to); <a name=L35 href="source/kernel/signal.c#L35">35</a> from++; <a name=L36 href="source/kernel/signal.c#L36">36</a> to++; <a name=L37 href="source/kernel/signal.c#L37">37</a> } <a name=L38 href="source/kernel/signal.c#L38">38</a> } <a name=L39 href="source/kernel/signal.c#L39">39</a> <a name=L40 href="source/kernel/signal.c#L40">40</a> static inline void <a href="ident?i=get_new">get_new</a>(char * from,char * to) <a name=L41 href="source/kernel/signal.c#L41">41</a> { <a name=L42 href="source/kernel/signal.c#L42">42</a> int i; <a name=L43 href="source/kernel/signal.c#L43">43</a> <a name=L44 href="source/kernel/signal.c#L44">44</a> for (i=0 ; i< sizeof(struct <a href="ident?i=sigaction">sigaction</a>) ; i++) <a name=L45 href="source/kernel/signal.c#L45">45</a> *(to++) = <a href="ident?i=get_fs_byte">get_fs_byte</a>(from++); <a name=L46 href="source/kernel/signal.c#L46">46</a> } <a name=L47 href="source/kernel/signal.c#L47">47</a> <a name=L48 href="source/kernel/signal.c#L48">48</a> int <a href="ident?i=sys_signal">sys_signal</a>(int signum, long handler, long restorer) <a name=L49 href="source/kernel/signal.c#L49">49</a> { <a name=L50 href="source/kernel/signal.c#L50">50</a> struct <a href="ident?i=sigaction">sigaction</a> tmp; <a name=L51 href="source/kernel/signal.c#L51">51</a> <a name=L52 href="source/kernel/signal.c#L52">52</a> if (signum<1 || signum>32 || signum==<a href="ident?i=SIGKILL">SIGKILL</a>) <a name=L53 href="source/kernel/signal.c#L53">53</a> return -1; <a name=L54 href="source/kernel/signal.c#L54">54</a> tmp.sa_handler = (void (*)(int)) handler; <a name=L55 href="source/kernel/signal.c#L55">55</a> tmp.sa_mask = 0; <a name=L56 href="source/kernel/signal.c#L56">56</a> tmp.sa_flags = <a href="ident?i=SA_ONESHOT">SA_ONESHOT</a> | <a href="ident?i=SA_NOMASK">SA_NOMASK</a>; <a name=L57 href="source/kernel/signal.c#L57">57</a> tmp.sa_restorer = (void (*)(void)) restorer; <a name=L58 href="source/kernel/signal.c#L58">58</a> handler = (long) <a href="ident?i=current">current</a>-><a href="ident?i=sigaction">sigaction</a>[signum-1].sa_handler; <a name=L59 href="source/kernel/signal.c#L59">59</a> <a href="ident?i=current">current</a>-><a href="ident?i=sigaction">sigaction</a>[signum-1] = tmp; <a name=L60 href="source/kernel/signal.c#L60">60</a> return handler; <a name=L61 href="source/kernel/signal.c#L61">61</a> } <a name=L62 href="source/kernel/signal.c#L62">62</a> <a name=L63 href="source/kernel/signal.c#L63">63</a> int <a href="ident?i=sys_sigaction">sys_sigaction</a>(int signum, const struct <a href="ident?i=sigaction">sigaction</a> * action, <a name=L64 href="source/kernel/signal.c#L64">64</a> struct <a href="ident?i=sigaction">sigaction</a> * oldaction) <a name=L65 href="source/kernel/signal.c#L65">65</a> { <a name=L66 href="source/kernel/signal.c#L66">66</a> struct <a href="ident?i=sigaction">sigaction</a> tmp; <a name=L67 href="source/kernel/signal.c#L67">67</a> <a name=L68 href="source/kernel/signal.c#L68">68</a> if (signum<1 || signum>32 || signum==<a href="ident?i=SIGKILL">SIGKILL</a>) <a name=L69 href="source/kernel/signal.c#L69">69</a> return -1; <a name=L70 href="source/kernel/signal.c#L70">70</a> tmp = <a href="ident?i=current">current</a>-><a href="ident?i=sigaction">sigaction</a>[signum-1]; <a name=L71 href="source/kernel/signal.c#L71">71</a> <a href="ident?i=get_new">get_new</a>((char *) action, <a name=L72 href="source/kernel/signal.c#L72">72</a> (char *) (signum-1+<a href="ident?i=current">current</a>-><a href="ident?i=sigaction">sigaction</a>)); <a name=L73 href="source/kernel/signal.c#L73">73</a> if (oldaction) <a name=L74 href="source/kernel/signal.c#L74">74</a> <a href="ident?i=save_old">save_old</a>((char *) &tmp,(char *) oldaction); <a name=L75 href="source/kernel/signal.c#L75">75</a> if (<a href="ident?i=current">current</a>-><a href="ident?i=sigaction">sigaction</a>[signum-1].sa_flags & <a href="ident?i=SA_NOMASK">SA_NOMASK</a>) <a name=L76 href="source/kernel/signal.c#L76">76</a> <a href="ident?i=current">current</a>-><a href="ident?i=sigaction">sigaction</a>[signum-1].sa_mask = 0; <a name=L77 href="source/kernel/signal.c#L77">77</a> else <a name=L78 href="source/kernel/signal.c#L78">78</a> <a href="ident?i=current">current</a>-><a href="ident?i=sigaction">sigaction</a>[signum-1].sa_mask |= (1<<(signum-1)); <a name=L79 href="source/kernel/signal.c#L79">79</a> return 0; <a name=L80 href="source/kernel/signal.c#L80">80</a> } <a name=L81 href="source/kernel/signal.c#L81">81</a> <a name=L82 href="source/kernel/signal.c#L82">82</a> void <a href="ident?i=do_signal">do_signal</a>(long signr,long eax, long ebx, long ecx, long edx, <a name=L83 href="source/kernel/signal.c#L83">83</a> long fs, long es, long ds, <a name=L84 href="source/kernel/signal.c#L84">84</a> long eip, long cs, long eflags, <a name=L85 href="source/kernel/signal.c#L85">85</a> unsigned long * esp, long ss) <a name=L86 href="source/kernel/signal.c#L86">86</a> { <a name=L87 href="source/kernel/signal.c#L87">87</a> unsigned long sa_handler; <a name=L88 href="source/kernel/signal.c#L88">88</a> long old_eip=eip; <a name=L89 href="source/kernel/signal.c#L89">89</a> struct <a href="ident?i=sigaction">sigaction</a> * sa = <a href="ident?i=current">current</a>-><a href="ident?i=sigaction">sigaction</a> + signr - 1; <a name=L90 href="source/kernel/signal.c#L90">90</a> int longs; <a name=L91 href="source/kernel/signal.c#L91">91</a> unsigned long * tmp_esp; <a name=L92 href="source/kernel/signal.c#L92">92</a> <a name=L93 href="source/kernel/signal.c#L93">93</a> sa_handler = (unsigned long) sa->sa_handler; <a name=L94 href="source/kernel/signal.c#L94">94</a> if (sa_handler==1) <a name=L95 href="source/kernel/signal.c#L95">95</a> return; <a name=L96 href="source/kernel/signal.c#L96">96</a> if (!sa_handler) { <a name=L97 href="source/kernel/signal.c#L97">97</a> if (signr==<a href="ident?i=SIGCHLD">SIGCHLD</a>) <a name=L98 href="source/kernel/signal.c#L98">98</a> return; <a name=L99 href="source/kernel/signal.c#L99">99</a> else<a name=L100 href="source/kernel/signal.c#L100">100</a> <a href="ident?i=do_exit">do_exit</a>(1<<(signr-1));<a name=L101 href="source/kernel/signal.c#L101">101</a> }<a name=L102 href="source/kernel/signal.c#L102">102</a> if (sa->sa_flags & <a href="ident?i=SA_ONESHOT">SA_ONESHOT</a>)<a name=L103 href="source/kernel/signal.c#L103">103</a> sa->sa_handler = <a href="ident?i=NULL">NULL</a>;<a name=L104 href="source/kernel/signal.c#L104">104</a> *(&eip) = sa_handler;<a name=L105 href="source/kernel/signal.c#L105">105</a> longs = (sa->sa_flags & <a href="ident?i=SA_NOMASK">SA_NOMASK</a>)?7:8;<a name=L106 href="source/kernel/signal.c#L106">106</a> *(&esp) -= longs;<a name=L107 href="source/kernel/signal.c#L107">107</a> <a href="ident?i=verify_area">verify_area</a>(esp,longs*4);<a name=L108 href="source/kernel/signal.c#L108">108</a> tmp_esp=esp;<a name=L109 href="source/kernel/signal.c#L109">109</a> <a href="ident?i=put_fs_long">put_fs_long</a>((long) sa->sa_restorer,tmp_esp++);<a name=L110 href="source/kernel/signal.c#L110">110</a> <a href="ident?i=put_fs_long">put_fs_long</a>(signr,tmp_esp++);<a name=L111 href="source/kernel/signal.c#L111">111</a> if (!(sa->sa_flags & <a href="ident?i=SA_NOMASK">SA_NOMASK</a>))<a name=L112 href="source/kernel/signal.c#L112">112</a> <a href="ident?i=put_fs_long">put_fs_long</a>(<a href="ident?i=current">current</a>->blocked,tmp_esp++);<a name=L113 href="source/kernel/signal.c#L113">113</a> <a href="ident?i=put_fs_long">put_fs_long</a>(eax,tmp_esp++);<a name=L114 href="source/kernel/signal.c#L114">114</a> <a href="ident?i=put_fs_long">put_fs_long</a>(ecx,tmp_esp++);<a name=L115 href="source/kernel/signal.c#L115">115</a> <a href="ident?i=put_fs_long">put_fs_long</a>(edx,tmp_esp++);<a name=L116 href="source/kernel/signal.c#L116">116</a> <a href="ident?i=put_fs_long">put_fs_long</a>(eflags,tmp_esp++);<a name=L117 href="source/kernel/signal.c#L117">117</a> <a href="ident?i=put_fs_long">put_fs_long</a>(old_eip,tmp_esp++);<a name=L118 href="source/kernel/signal.c#L118">118</a> <a href="ident?i=current">current</a>->blocked |= sa->sa_mask;<a name=L119 href="source/kernel/signal.c#L119">119</a> }<a name=L120 href="source/kernel/signal.c#L120">120</a> </pre><hr><div align=center> [<b><i>源代码浏览</i></b>] [<a href="diff/kernel/signal.c">区别标定</a>] [<a href="ident">标识符搜索</a>] [<a href="search">文本搜索</a>] [<a href="find">文件搜索</a>] </div><hr>本网页由 <a href="http:blurb.html">LXR引擎</a> 自动生成.<br></html>⌨️ 快捷键说明
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