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388b4f1a02
The .symver directive on common symbol just creates a new common symbol, not an alias and the newer assembler with the bug fix for https://sourceware.org/bugzilla/show_bug.cgi?id=21661 will issue an error. Before the fix, we got $ readelf -sW libc.so | grep "loc[12s]" 5109: 00000000003a0608 8 OBJECT LOCAL DEFAULT 36 loc1 5188: 00000000003a0610 8 OBJECT LOCAL DEFAULT 36 loc2 5455: 00000000003a0618 8 OBJECT LOCAL DEFAULT 36 locs 6575: 00000000003a05f0 8 OBJECT GLOBAL DEFAULT 36 locs@GLIBC_2.2.5 7156: 00000000003a05f8 8 OBJECT GLOBAL DEFAULT 36 loc1@GLIBC_2.2.5 7312: 00000000003a0600 8 OBJECT GLOBAL DEFAULT 36 loc2@GLIBC_2.2.5 in libc.so. The versioned loc1, loc2 and locs have the wrong addresses. After the fix, we got $ readelf -sW libc.so | grep "loc[12s]" 6570: 000000000039e3b8 8 OBJECT GLOBAL DEFAULT 34 locs@GLIBC_2.2.5 7151: 000000000039e3c8 8 OBJECT GLOBAL DEFAULT 34 loc1@GLIBC_2.2.5 7307: 000000000039e3c0 8 OBJECT GLOBAL DEFAULT 34 loc2@GLIBC_2.2.5 [BZ #21666] * misc/regexp.c (loc1): Add __attribute__ ((nocommon)); (loc2): Likewise. (locs): Likewise.
94 lines
3.3 KiB
C
94 lines
3.3 KiB
C
/* Compatibility symbols for the obsolete <regexp.h> interface.
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Copyright (C) 1996-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* regexp.h now contains only an #error directive, so it cannot be
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used in this file.
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The function that would produce an 'expbuf' to use as the second
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argument to 'step' and 'advance' was defined only in regexp.h,
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as its definition depended on macros defined by the user. */
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#include <regex.h>
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#include <shlib-compat.h>
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#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_23)
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/* Define the variables used for the interface. Avoid .symver on common
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symbol, which just creates a new common symbol, not an alias. */
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char *loc1 __attribute__ ((nocommon));
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char *loc2 __attribute__ ((nocommon));
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compat_symbol (libc, loc1, loc1, GLIBC_2_0);
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compat_symbol (libc, loc2, loc2, GLIBC_2_0);
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/* Although we do not support the use we define this variable as well. */
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char *locs __attribute__ ((nocommon));
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compat_symbol (libc, locs, locs, GLIBC_2_0);
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/* Find the next match in STRING. The compiled regular expression is
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found in the buffer starting at EXPBUF. `loc1' will return the
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first character matched and `loc2' points to the next unmatched
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character. */
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int
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weak_function attribute_compat_text_section
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step (const char *string, const char *expbuf)
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{
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regmatch_t match; /* We only need info about the full match. */
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expbuf += __alignof (regex_t *);
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expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *);
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if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL)
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== REG_NOMATCH)
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return 0;
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loc1 = (char *) string + match.rm_so;
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loc2 = (char *) string + match.rm_eo;
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return 1;
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}
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compat_symbol (libc, step, step, GLIBC_2_0);
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/* Match the beginning of STRING with the compiled regular expression
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in EXPBUF. If the match is successful `loc2' will contain the
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position of the first unmatched character. */
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int
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weak_function attribute_compat_text_section
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advance (const char *string, const char *expbuf)
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{
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regmatch_t match; /* We only need info about the full match. */
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expbuf += __alignof__ (regex_t *);
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expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *);
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if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL)
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== REG_NOMATCH
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/* We have to check whether the check is at the beginning of the
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buffer. */
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|| match.rm_so != 0)
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return 0;
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loc2 = (char *) string + match.rm_eo;
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return 1;
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}
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compat_symbol (libc, advance, advance, GLIBC_2_0);
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#endif /* SHLIB_COMPAT (2.0, 2.23) */
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