From: "Frédéric Bérat" <fberat@redhat.com>
To: libc-alpha@sourceware.org
Cc: siddhesh@gotplt.org, fberat@redhat.com
Subject: [PATCH v3 08/16] wchar: Avoid PLT entries with _FORTIFY_SOURCE
Date: Wed, 28 Jun 2023 10:42:38 +0200 [thread overview]
Message-ID: <20230628084246.778302-9-fberat@redhat.com> (raw)
In-Reply-To: <20230628084246.778302-1-fberat@redhat.com>
The change is meant to avoid unwanted PLT entries for the wmemset and
wcrtomb routines when _FORTIFY_SOURCE is set.
On top of that, ensure that *_chk routines have their hidden builtin
definitions available.
---
debug/wcrtomb_chk.c | 1 +
debug/wmemset_chk.c | 1 +
include/wchar.h | 15 +++++++++++++++
.../ldbl-128ibm-compat/ieee128-fwprintf_chk.c | 1 +
sysdeps/x86_64/multiarch/wmemset_chk.c | 4 ++++
wcsmbs/bits/wchar2-decl.h | 4 ++--
6 files changed, 24 insertions(+), 2 deletions(-)
diff --git a/debug/wcrtomb_chk.c b/debug/wcrtomb_chk.c
index 657be7471d..c156fe09c1 100644
--- a/debug/wcrtomb_chk.c
+++ b/debug/wcrtomb_chk.c
@@ -28,3 +28,4 @@ __wcrtomb_chk (char *s, wchar_t wchar, mbstate_t *ps, size_t buflen)
{
return __wcrtomb_internal (s, wchar, ps, buflen);
}
+libc_hidden_def (__wcrtomb_chk)
diff --git a/debug/wmemset_chk.c b/debug/wmemset_chk.c
index e11a92815e..1e7fc4fdea 100644
--- a/debug/wmemset_chk.c
+++ b/debug/wmemset_chk.c
@@ -26,3 +26,4 @@ __wmemset_chk (wchar_t *s, wchar_t c, size_t n, size_t dstlen)
return wmemset (s, c, n);
}
+libc_hidden_builtin_def (__wmemset_chk)
diff --git a/include/wchar.h b/include/wchar.h
index 7b763bc24f..484e6b3fef 100644
--- a/include/wchar.h
+++ b/include/wchar.h
@@ -166,6 +166,8 @@ libc_hidden_proto (putwc)
libc_hidden_proto (mbrtowc)
libc_hidden_proto (wcrtomb)
+libc_hidden_proto (__wcrtomb_chk)
+
extern int __wcscmp (const wchar_t *__s1, const wchar_t *__s2)
__THROW __attribute_pure__;
libc_hidden_proto (__wcscmp)
@@ -260,16 +262,25 @@ extern wchar_t *__wcschrnul (const wchar_t *__s, wchar_t __wc)
extern wchar_t *__wmemset_chk (wchar_t *__s, wchar_t __c, size_t __n,
size_t __ns) __THROW;
+libc_hidden_builtin_proto (__wmemset_chk)
extern int __vfwscanf (__FILE *__restrict __s,
const wchar_t *__restrict __format,
__gnuc_va_list __arg)
attribute_hidden
/* __attribute__ ((__format__ (__wscanf__, 2, 0)) */;
+
+extern int __swprintf_chk (wchar_t *__restrict __s, size_t __n,
+ int __flag, size_t __s_len,
+ const wchar_t *__restrict __format, ...)
+ __THROW /* __attribute__ ((__format__ (__wprintf__, 5, 6))) */;
+
extern int __fwprintf (__FILE *__restrict __s,
const wchar_t *__restrict __format, ...)
attribute_hidden
/* __attribute__ ((__format__ (__wprintf__, 2, 3))) */;
+extern int __wprintf_chk (int __flag, const wchar_t *__restrict __format,
+ ...);
extern int __vfwprintf_chk (FILE *__restrict __s, int __flag,
const wchar_t *__restrict __format,
__gnuc_va_list __arg)
@@ -279,6 +290,10 @@ extern int __vswprintf_chk (wchar_t *__restrict __s, size_t __n,
const wchar_t *__restrict __format,
__gnuc_va_list __arg)
/* __attribute__ ((__format__ (__wprintf__, 5, 0))) */;
+extern int __fwprintf_chk (__FILE *__restrict __stream, int __flag,
+ const wchar_t *__restrict __format, ...);
+extern int __vwprintf_chk (int __flag, const wchar_t *__restrict __format,
+ __gnuc_va_list __ap);
extern int __isoc99_fwscanf (__FILE *__restrict __stream,
const wchar_t *__restrict __format, ...);
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-fwprintf_chk.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-fwprintf_chk.c
index 5b6cc3e768..10658ab125 100644
--- a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-fwprintf_chk.c
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-fwprintf_chk.c
@@ -17,6 +17,7 @@
<https://www.gnu.org/licenses/>. */
#include <stdarg.h>
+#include <wchar.h>
#include <libio/libioP.h>
extern int
diff --git a/sysdeps/x86_64/multiarch/wmemset_chk.c b/sysdeps/x86_64/multiarch/wmemset_chk.c
index ac93a1f376..00edf44918 100644
--- a/sysdeps/x86_64/multiarch/wmemset_chk.c
+++ b/sysdeps/x86_64/multiarch/wmemset_chk.c
@@ -28,4 +28,8 @@
libc_ifunc_redirected (__redirect_wmemset_chk, __wmemset_chk,
IFUNC_SELECTOR ());
+# ifdef SHARED
+__hidden_ver1 (__wmemset_chk, __GI___wmemset_chk, __redirect_wmemset_chk)
+ __attribute__ ((visibility ("hidden"))) __attribute_copy__ (__wmemset_chk);
+# endif
#endif
diff --git a/wcsmbs/bits/wchar2-decl.h b/wcsmbs/bits/wchar2-decl.h
index f3a2fd3c99..08c8ebd0e8 100644
--- a/wcsmbs/bits/wchar2-decl.h
+++ b/wcsmbs/bits/wchar2-decl.h
@@ -71,7 +71,7 @@ extern wchar_t *__REDIRECT_NTH (__wmempcpy_chk_warn,
extern wchar_t *__wmemset_chk (wchar_t *__s, wchar_t __c, size_t __n,
size_t __ns) __THROW;
-extern wchar_t *__REDIRECT_NTH (__wmemset_alias, (wchar_t *__s, wchar_t __c,
+extern wchar_t *__REDIRECT_FORTIFY_NTH (__wmemset_alias, (wchar_t *__s, wchar_t __c,
size_t __n), wmemset);
extern wchar_t *__REDIRECT_NTH (__wmemset_chk_warn,
(wchar_t *__s, wchar_t __c, size_t __n,
@@ -203,7 +203,7 @@ extern wchar_t *__REDIRECT (__fgetws_unlocked_chk_warn,
extern size_t __wcrtomb_chk (char *__restrict __s, wchar_t __wchar,
mbstate_t *__restrict __p,
size_t __buflen) __THROW __wur;
-extern size_t __REDIRECT_NTH (__wcrtomb_alias,
+extern size_t __REDIRECT_FORTIFY_NTH (__wcrtomb_alias,
(char *__restrict __s, wchar_t __wchar,
mbstate_t *__restrict __ps), wcrtomb) __wur;
--
2.41.0
next prev parent reply other threads:[~2023-06-28 8:43 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-28 8:42 [PATCH v3 00/16] Allow glibc to be built " Frédéric Bérat
2023-06-28 8:42 ` [PATCH v3 01/16] " Frédéric Bérat
2023-06-28 14:48 ` Joseph Myers
2023-06-28 8:42 ` [PATCH v3 02/16] Exclude routines from fortification Frédéric Bérat
2023-06-30 14:55 ` Siddhesh Poyarekar
2023-07-03 15:16 ` Frederic Berat
2023-07-04 16:04 ` Siddhesh Poyarekar
2023-06-28 8:42 ` [PATCH v3 03/16] sysdeps: Ensure ieee128*_chk routines to be properly named Frédéric Bérat
2023-06-30 14:58 ` Siddhesh Poyarekar
2023-06-30 15:55 ` Paul E Murphy
2023-06-30 15:57 ` Frederic Berat
2023-06-28 8:42 ` [PATCH v3 04/16] string: Ensure *_chk routines have their hidden builtin definition available Frédéric Bérat
2023-06-30 15:06 ` Siddhesh Poyarekar
2023-06-28 8:42 ` [PATCH v3 05/16] stdio: " Frédéric Bérat
2023-06-30 15:09 ` Siddhesh Poyarekar
2023-06-28 8:42 ` [PATCH v3 06/16] asprintf_chk: Ensure compatibility for both s390x and ppc64le Frédéric Bérat
2023-06-30 15:11 ` Siddhesh Poyarekar
2023-06-30 16:08 ` Rajalakshmi Srinivasaraghavan
2023-06-30 17:51 ` Paul E Murphy
2023-07-03 5:35 ` Frederic Berat
2023-06-28 8:42 ` [PATCH v3 07/16] misc/sys/cdefs.h: Create FORTIFY redirects for internal calls Frédéric Bérat
2023-06-30 15:13 ` Siddhesh Poyarekar
2023-06-28 8:42 ` Frédéric Bérat [this message]
2023-06-30 15:17 ` [PATCH v3 08/16] wchar: Avoid PLT entries with _FORTIFY_SOURCE Siddhesh Poyarekar
2023-06-30 15:26 ` Frederic Berat
2023-06-28 8:42 ` [PATCH v3 09/16] posix/bits/unistd.h: Clearly separate declaration from definitions Frédéric Bérat
2023-06-30 15:19 ` Siddhesh Poyarekar
2023-06-28 8:42 ` [PATCH v3 10/16] unistd: Avoid PLT entries with _FORTIFY_SOURCE Frédéric Bérat
2023-06-30 15:25 ` Siddhesh Poyarekar
2023-06-28 8:42 ` [PATCH v3 11/16] misc/bits/select2.h: Clearly separate declaration from definitions Frédéric Bérat
2023-06-30 15:26 ` Siddhesh Poyarekar
2023-06-28 8:42 ` [PATCH v3 12/16] misc/bits/syslog.h: Clearly separate declaration from definition Frédéric Bérat
2023-06-30 15:28 ` Siddhesh Poyarekar
2023-06-28 8:42 ` [PATCH v3 13/16] libio/bits/stdio2.h: Clearly separate declaration from definitions Frédéric Bérat
2023-06-30 15:29 ` Siddhesh Poyarekar
2023-06-28 8:42 ` [PATCH v3 14/16] libio/bits/stdio2-decl.h: Avoid PLT entries with _FORTIFY_SOURCE Frédéric Bérat
2023-06-30 15:30 ` Siddhesh Poyarekar
2023-06-30 15:38 ` Frederic Berat
2023-06-30 15:48 ` Siddhesh Poyarekar
2023-06-30 17:08 ` Siddhesh Poyarekar
2023-06-28 8:42 ` [PATCH v3 15/16] sysdeps/ieee754/ldbl-128ibm-compat: Fix warn unused result Frédéric Bérat
2023-06-30 15:33 ` Siddhesh Poyarekar
2023-06-28 8:42 ` [PATCH v3 16/16] Add --enable-fortify-source option Frédéric Bérat
2023-06-30 13:51 ` Siddhesh Poyarekar
2023-07-03 8:50 ` Andreas Schwab
2023-07-03 12:51 ` Adhemerval Zanella Netto
2023-07-04 12:40 ` Frederic Berat
2023-07-04 15:59 ` Siddhesh Poyarekar
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