2 .\" Copyright (c) 2001, Michael Kerrisk (mtk.manpages@gmail.com)
4 .\" Permission is granted to make and distribute verbatim copies of this
5 .\" manual provided the copyright notice and this permission notice are
6 .\" preserved on all copies.
8 .\" Permission is granted to copy and distribute modified versions of this
9 .\" manual under the conditions for verbatim copying, provided that the
10 .\" entire resulting derived work is distributed under the terms of a
11 .\" permission notice identical to this one.
13 .\" Since the Linux kernel and libraries are constantly changing, this
14 .\" manual page may be incorrect or out-of-date. The author(s) assume no
15 .\" responsibility for errors or omissions, or for damages resulting from
16 .\" the use of the information contained herein. The author(s) may not
17 .\" have taken the same level of care in the production of this manual,
18 .\" which is licensed free of charge, as they might when working
21 .\" Formatted or processed versions of this manual, if unaccompanied by
22 .\" the source, must acknowledge the copyright and authors of this work.
24 .\" aeb, various minor fixes
26 .\" Japanese Version Copyright (c) 2001 Yuichi SATO
27 .\" all rights reserved.
28 .\" Translated 2001-11-04, Yuichi SATO <ysato@h4.dion.ne.jp>
29 .\" Updated 2001-12-09, Yuichi SATO
30 .\" Updated 2005-11-04, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
31 .\" Updated 2006-01-04, Akihiro MOTOKI, Catch up to LDP 2.20
33 .\"WORD: alternate signal stack ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯
34 .\"WORD: establish (¥¹¥¿¥Ã¥¯¤Î) ³ÎΩ
36 .TH SIGALTSTACK 2 2010-09-26 "Linux" "Linux Programmer's Manual"
38 sigaltstack \- ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤Î¥³¥ó¥Æ¥¥¹¥È¤òÀßÄꡦ¼èÆÀ¤¹¤ë
40 .B #include <signal.h>
42 .BI "int sigaltstack(const stack_t *" ss ", stack_t *" oss );
45 glibc ¸þ¤±¤Îµ¡Ç½¸¡ºº¥Þ¥¯¥í¤ÎÍ×·ï
46 .RB ( feature_test_macros (7)
54 _BSD_SOURCE || _XOPEN_SOURCE\ >=\ 500 ||
55 _XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED
57 || /* glibc 2.12 °Ê¹ß: */ _POSIX_C_SOURCE\ >=\ 200809L
64 ¥×¥í¥»¥¹¤Ï¿·¤·¤¤ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤òÄêµÁ¤·¤¿¤ê¡¢
65 ´û¸¤ÎÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤Î¾õÂÖ¤ò¼èÆÀ¤Ç¤¤ë¡£
66 ¥·¥°¥Ê¥ë¥Ï¥ó¥É¥é¤¬ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤òÍ׵᤹¤ë¤è¤¦¤ËÀßÄꤵ¤ì¤Æ¤¤¤ë¤È
68 »²¾È)¡¢¥Ï¥ó¥É¥é¤Î¼Â¹ÔÃæ¤Ï¤½¤Î¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤¬»È¤ï¤ì¤ë¡£
70 ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤ò»È¤¦ºÝ¤Î°ìÈÌŪ¤Ê¼ê½ç¤Ï¡¢°Ê²¼¤ÎÄ̤ê¤Ç¤¢¤ë:
73 ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤Ç»È¤¦¥á¥â¥êÎΰè¤ò³ÎÊݤ¹¤ë¡£
78 ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤Î¸ºß¤È¾ì½ê¤ò¥·¥¹¥Æ¥à¤ËÃΤ餻¤ë¡£
82 ¤ò»È¤Ã¤Æ¥·¥°¥Ê¥ë¥Ï¥ó¥É¥é¤ò³ÎΩ¤¹¤ëºÝ¡¢
83 \fBSA_ONSTACK\fP ¥Õ¥é¥°¤ò»ØÄꤹ¤ë¤³¤È¤Ë¤è¤ê¡¢
84 ¤½¤Î¥·¥°¥Ê¥ë¥Ï¥ó¥É¥é¤òÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¾å¤Ç¼Â¹Ô¤¹¤ë¤³¤È¤ò
87 \fIss\fP °ú¤¿ô¤Ï¡¢¿·¤·¤¤¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤ò»ØÄꤹ¤ë¤¿¤á¤Ë»È¤¦¡£
88 ¤Þ¤¿ \fIoss\fP °ú¤¿ô¤Ï¡¢¸½ºß³ÎΩ¤µ¤ì¤Æ¤¤¤ë
89 ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤Î¾ðÊó¤ò¼èÆÀ¤¹¤ë¤¿¤á¤Ë»È¤¦¡£
90 ¤³¤ÎÁàºî¤Î¤¦¤Á 1 ¤Ä¤À¤±¤ò¼Â¹Ô¤µ¤»¤ë¤Ë¤Ï¡¢
91 »ÈÍѤ·¤Ê¤¤°ú¤¿ô¤ò NULL ¤Ë»ØÄꤹ¤ì¤Ð¤è¤¤¡£
92 °ú¤¿ô¤È¤Ê¤ë¹½Â¤ÂΤϡ¢°Ê²¼¤Î¤è¤¦¤Ê·¿¤Ç¤¢¤ë:
97 void *ss_sp; /* ¥¹¥¿¥Ã¥¯¤Î¥Ù¡¼¥¹¥¢¥É¥ì¥¹ */
98 int ss_flags; /* ¥Õ¥é¥° */
99 size_t ss_size; /* ¥¹¥¿¥Ã¥¯¤Î¥Ð¥¤¥È¿ô */
104 ¿·µ¬¤ÎÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤ò³ÎΩ¤¹¤ë¤Ë¤Ï¡¢
105 \fIss.ss_flags\fP ¤ò 0 ¤ËÀßÄꤷ¡¢
106 \fIss.ss_sp\fP ¤È \fIss.ss_size\fP ¤Ë
107 ¥¹¥¿¥Ã¥¯¤Î³«»Ï¥¢¥É¥ì¥¹¤È¥¹¥¿¥Ã¥¯¥µ¥¤¥º¤ò»ØÄꤹ¤ë¡£
108 Äê¿ô \fBSIGSTKSZ\fP ¤Ï¡¢ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤¬Ä̾ïɬÍפ¹¤ë
109 ¥µ¥¤¥º¤è¤ê¤â½¼Ê¬Â礤¯ÄêµÁ¤µ¤ì¤Æ¤¤¤ë¡£
110 ¤Þ¤¿Äê¿ô \fBMINSIGSTKSZ\fP ¤Ï¡¢
111 ¥·¥°¥Ê¥ë¥Ï¥ó¥É¥é¤Î¼Â¹Ô¤ËɬÍפʺǾ®¥µ¥¤¥º¤ËÄêµÁ¤µ¤ì¤Æ¤¤¤ë¡£
113 ÂåÂØ¥¹¥¿¥Ã¥¯¤Ç¥·¥°¥Ê¥ë¥Ï¥ó¥É¥é¤¬µ¯Æ°¤µ¤ì¤¿¾ì¹ç¤Ë¤Ï¡¢
114 ¥«¡¼¥Í¥ë¤Ë¤è¤ê¼«Æ°Åª¤Ë¡¢\fIss.ss_sp\fP ¤Ç»ØÄꤵ¤ì¤¿¥¢¥É¥ì¥¹¤Ï
115 Æ°ºî¤·¤Æ¤¤¤ë¥Ï¡¼¥É¥¦¥§¥¢¥¢¡¼¥¥Æ¥¯¥Á¥ã¤ËŬ¤·¤¿¥¢¥É¥ì¥¹¶³¦¤Ë
118 ´û¸¤Î¥¹¥¿¥Ã¥¯¤ò̵¸ú¤Ë¤¹¤ë¤Ë¤Ï¡¢
119 \fIss.ss_flags\fP ¤ò \fBSS_DISABLE\fP ¤Ë»ØÄꤹ¤ë¡£
120 ¤³¤Î¾ì¹ç¡¢\fIss\fP ¤Î¾¤Î¥Õ¥£¡¼¥ë¥É¤Ï̵»ë¤µ¤ì¤ë¡£
122 \fIoss\fP ¤¬ NULL °Ê³°¤Î¾ì¹ç¡¢
123 \fIoss\fP ¤ËÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤Î¾ðÊó¤¬ÊÖ¤µ¤ì¤ë¡£
126 ¤Î¸Æ¤Ó½Ð¤·¤è¤êÀè¤Ë¹Ô¤ï¤ì¤ë¡£
127 \fIoss.ss_sp\fP ¤È \fIoss.ss_size\fP ¥Õ¥£¡¼¥ë¥É¤Ë
128 ¥¹¥¿¥Ã¥¯¤Î³«»Ï¥¢¥É¥ì¥¹¤È¥¹¥¿¥Ã¥¯¥µ¥¤¥º¤¬ÊÖ¤µ¤ì¤ë¡£
129 \fIoss.ss_flags\fP ¤Ë¤Ï°Ê²¼¤Î¤É¤Á¤é¤«¤ÎÃͤ¬ÊÖ¤µ¤ì¤ë:
132 ¥×¥í¥»¥¹¤¬ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¾å¤Ç¼Â¹Ô¤µ¤ì¤Æ¤¤¤ë
133 (¥×¥í¥»¥¹¤¬´û¤Ë¤½¤Î¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¾å¤Ç¼Â¹Ô¤µ¤ì¤Æ¤¤¤ë¾ì¹ç¤Ï¡¢
134 ¤½¤ì¤ÈƱ¤¸¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤Ë¤ÏÊѹ¹¤Ç¤¤Ê¤¤ÅÀ¤ËÃí°Õ¤¹¤ë¤³¤È)¡£
137 ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤¬¸½ºß̵¸ú¤Ë¤Ê¤Ã¤Æ¤¤¤ë¡£
140 ¤ÏÀ®¸ù¤·¤¿¾ì¹ç 0 ¤òÊÖ¤¹¡£
141 ¼ºÇÔ¤·¤¿¾ì¹ç¤Ï \-1 ¤òÊÖ¤·¤Æ¡¢
142 ¥¨¥é¡¼¤ò¼¨¤¹ÃÍ¤Ë \fIerrno\fP ¤òÀßÄꤹ¤ë¡£
146 \fIss\fP ¤Þ¤¿¤Ï \fIoss\fP ¤Î¤É¤Á¤é¤¬¡¢NULL °Ê³°¤Ç¡¢
147 ¤«¤Ä¥×¥í¥»¥¹¤Î¥¢¥É¥ì¥¹¶õ´Ö¤Î³°¤ò»Ø¤·¤Æ¤¤¤ë¡£
150 \fIss\fP ¤¬ NULL °Ê³°¤Ç¡¢\fIss_flags\fP ¥Õ¥£¡¼¥ë¥É¤¬
152 °Ê³°¤Î 0 ¤Ç¤Ê¤¤ÃͤˤʤäƤ¤¤ë¡£
155 ¿·¤·¤¤ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯ (\fIss.ss_size\fP) ¤Ë»ØÄꤷ¤¿¥µ¥¤¥º¤¬
156 \fBMINSTKSZ\fP ¤è¤ê¾®¤µ¤¤¡£
159 ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤¬Í¸ú¤Ç¤¢¤ë¤È¤¤ËÊѹ¹¤ò¹Ô¤ª¤¦¤È¤·¤¿
160 (¤Ä¤Þ¤ê¡¢¥×¥í¥»¥¹¤¬´û¤Ë¸½ºß¤ÎÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¾å¤Ç¼Â¹Ô¤µ¤ì¤Æ¤¤¤¿)¡£
162 SUSv2, SVr4, POSIX.1-2001.
164 ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤ò»ÈÍѤ¹¤ëºÇ¤â¤è¤¯¤¢¤ë¾ìÌ̤ϡ¢
166 ¥·¥°¥Ê¥ë¤ò°·¤¦¤È¤¤Ç¤¢¤ë¡£
168 ¤Ï¥×¥í¥»¥¹¤ÎÄ̾ï¤Î¥¹¥¿¥Ã¥¯¤¬ÍøÍѤǤ¤ë¶õ´Ö¤¬»È¤¤²Ì¤¿¤µ¤ì¤¿ºÝ¤Ë
169 À¸À®¤µ¤ì¤ë¥·¥°¥Ê¥ë¤Ç¤¢¤ë¡£¤³¤Î¾ì¹ç¤Ë¤Ï¡¢
171 ÍѤΥ·¥°¥Ê¥ë¥Ï¥ó¥É¥é¤ò¥×¥í¥»¥¹¤Î¥¹¥¿¥Ã¥¯¾å¤Ç¤Ïµ¯Æ°¤¹¤ë¤³¤È¤¬¤Ç¤¤Ê¤¤¡£
172 ¤½¤Î¤¿¤á¡¢¤³¤Î¥·¥°¥Ê¥ë¤ò°·¤ª¤¦¤È¤¹¤ë¾ì¹ç¤Ë¤Ï¡¢
173 ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤ò»ÈÍѤ·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
175 ¥×¥í¥»¥¹¤¬É¸½à¤Î¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤ò»È¤¤²Ì¤¿¤¹¤³¤È¤¬Í½ÁÛ¤µ¤ì¤ë¾ì¹ç¤Ï¡¢
176 ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤ò³ÎΩ¤¹¤ë¤ÈÊØÍø¤Ç¤¢¤ë¡£
177 Î㤨¤Ð¡¢¥¹¥¿¥Ã¥¯¤¬ºÇ¾å°Ì¥¢¥É¥ì¥¹¤«¤é
178 ²¼°Ì¥¢¥É¥ì¥¹Êý¸þ¤ËÈó¾ï¤Ë¤¿¤¯¤µ¤óÀѤޤì¤Æ¤·¤Þ¤¦¤³¤È¤Ç¡¢
179 ºÇ²¼°Ì¥¢¥É¥ì¥¹¤«¤é¾å°Ì¥¢¥É¥ì¥¹Êý¸þ¤ËÀѤޤì¤ë¥Ò¡¼¥×¤È¤Ö¤Ä¤«¤Ã¤Æ¤·¤Þ¤¦¾ì¹ç¤ä¡¢
180 \fBsetrlimit(RLIMIT_STACK, &rlim)\fP ¤Î¸Æ¤Ó½Ð¤·¤Ç³ÎΩ¤µ¤ì¤¿
181 À©¸Â¤Ë㤷¤Æ¤·¤Þ¤Ã¤¿¾ì¹ç¤Ë¡¢¤³¤ÎÍͤʻö¤¬µ¯¤³¤ë¡£
182 ɸ½à¤Î¥¹¥¿¥Ã¥¯¤ò»È¤¤²Ì¤¿¤·¤Æ¤·¤Þ¤¦¤È¡¢
183 ¥«¡¼¥Í¥ë¤Ï¥×¥í¥»¥¹¤Ë \fBSIGSEGV\fP ¥·¥°¥Ê¥ë¤òÁ÷¤ë¡£
184 ¤³¤Î¤è¤¦¤Ê¾õ¶·¤Ç¤Ï¡¢ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¾å¤Ç¤·¤«¥·¥°¥Ê¥ë¤ò¥¥ã¥Ã¥Á¤Ç¤¤Ê¤¤¡£
186 Linux ¤¬¥µ¥Ý¡¼¥È¤¹¤ë¿¤¯¤Î¥Ï¡¼¥É¥¦¥§¥¢¥¢¡¼¥¥Æ¥¯¥Á¥ã¤Ç¤Ï¡¢
187 ¥¹¥¿¥Ã¥¯¤Ï²¼°Ì¥¢¥É¥ì¥¹Êý¸þ¤ËÀѤޤì¤ë¡£
189 ¤Ï¥¹¥¿¥Ã¥¯¤¬ÀѤޤì¤ëÊý¸þ¤ò¼«Æ°Åª¤Ë·èÄꤹ¤ë¡£
191 ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¾å¤Ç¼Â¹Ô¤µ¤ì¤Æ¤¤¤ë
192 ¥·¥°¥Ê¥ë¥Ï¥ó¥É¥é¤«¤é¸Æ¤Ð¤ì¤ë´Ø¿ô¤â¡¢ÂåÂØ¥·¥°¥Ê¥ë¥Ï¥ó¥É¥é¤ò»È¤¦
193 (¥×¥í¥»¥¹¤¬ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¾å¤Ç¼Â¹Ô¤µ¤ì¤Æ¤¤¤ë¾ì¹ç¡¢
194 ¾¤Î¥·¥°¥Ê¥ë¤Ç¸Æ¤Ó½Ð¤µ¤ì¤ë¥Ï¥ó¥É¥é¤â¤³¤ÎÂåÂØ¥·¥°¥Ê¥ë¥Ï¥ó¥É¥é¤ò»È¤¦)¡£
195 ɸ½à¤Î¥¹¥¿¥Ã¥¯¤È¤Ï°Û¤Ê¤ê¡¢
196 ¥·¥¹¥Æ¥à¤ÏÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤ò¼«Æ°Åª¤Ë³ÈÄ¥¤·¤Ê¤¤¡£
197 ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯ÍѤ˳ÎÊݤ·¤¿¥µ¥¤¥º¤ò±Û¤¨¤¿¾ì¹ç¡¢
201 ¤Î¸Æ¤Ó½Ð¤·¤¬À®¸ù¤¹¤ë¤È¡¢
202 ´û¸¤ÎÁ´¤Æ¤ÎÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤¬ºï½ü¤µ¤ì¤ë¡£
204 ·Ðͳ¤ÇºîÀ®¤µ¤ì¤¿»Ò¥×¥í¥»¥¹¤Ï¡¢¿Æ¥×¥í¥»¥¹¤ÎÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤Î
205 ÀßÄê¤Î¥³¥Ô¡¼¤ò·Ñ¾µ¤¹¤ë¡£
210 ¤òÃÖ¤´¹¤¨¤ë¤â¤Î¤Ç¤¢¤ë¡£
211 ²áµî¥×¥í¥°¥é¥à¤È¤Î¸ß´¹À¤Î¤¿¤á¡¢glibc ¤Ç¤Ï
214 ¿·¤·¤¤¤Î¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¤ÏÁ´¤Æ
216 ¤ò»È¤Ã¤Æ½ñ¤¯¤Ù¤¤Ç¤¢¤ë¡£
220 ¥·¥¹¥Æ¥à¥³¡¼¥ë¤¬¤¢¤Ã¤¿¡£
221 ¤³¤Î´Ø¿ô¤Ï¾¯¤·°Û¤Ê¤Ã¤¿¹½Â¤ÂΤò»È¤Ã¤Æ¤ª¤ê¡¢
222 ¸Æ¤Ó½Ð¤·¤¿Â¦¤¬¥¹¥¿¥Ã¥¯¤ÎÀѤޤì¤ëÊý¸þ¤òÃΤäƤ¤¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¤È¤¤¤¦
227 ¤Î»ÈÍÑË¡¤Î°ìÉô¤ò¼¨¤¹:
233 ss.ss_sp = malloc(SIGSTKSZ);
234 if (ss.ss_sp == NULL)
235 /* ¥Ï¥ó¥É¥ë¥¨¥é¡¼ */;
236 ss.ss_size = SIGSTKSZ;
238 if (sigaltstack(&ss, NULL) == \-1)
239 /* ¥Ï¥ó¥É¥ë¥¨¥é¡¼ */;