From: "Frédéric Bérat" <fberat@redhat.com>
To: libc-alpha@sourceware.org
Cc: siddhesh@gotplt.org, fberat@redhat.com
Subject: [PATCH v3 04/16] string: Ensure *_chk routines have their hidden builtin definition available
Date: Wed, 28 Jun 2023 10:42:34 +0200 [thread overview]
Message-ID: <20230628084246.778302-5-fberat@redhat.com> (raw)
In-Reply-To: <20230628084246.778302-1-fberat@redhat.com>
If libc_hidden_builtin_{def,proto} isn't properly set for *_chk routines,
there are unwanted PLT entries in libc.so.
---
debug/memcpy_chk.c | 1 +
debug/memmove_chk.c | 1 +
debug/mempcpy_chk.c | 1 +
debug/memset_chk.c | 1 +
debug/stpcpy_chk.c | 1 +
include/string.h | 7 +++++++
sysdeps/i386/i586/memcpy.S | 1 +
sysdeps/i386/i586/memset.S | 1 +
sysdeps/i386/i686/memcpy.S | 1 +
sysdeps/i386/i686/memmove.S | 1 +
sysdeps/i386/i686/mempcpy.S | 1 +
sysdeps/i386/i686/memset.S | 1 +
sysdeps/i386/i686/multiarch/memcpy_chk.c | 4 ++++
sysdeps/i386/i686/multiarch/memmove_chk.c | 4 ++++
sysdeps/i386/i686/multiarch/mempcpy_chk.c | 4 ++++
sysdeps/i386/i686/multiarch/memset_chk.c | 5 ++++-
sysdeps/i386/memcpy_chk.S | 1 +
sysdeps/i386/memmove_chk.S | 1 +
sysdeps/i386/mempcpy_chk.S | 1 +
sysdeps/i386/memset_chk.S | 1 +
sysdeps/x86_64/memcpy_chk.S | 1 +
sysdeps/x86_64/memmove_chk.S | 1 +
sysdeps/x86_64/mempcpy_chk.S | 1 +
sysdeps/x86_64/memset_chk.S | 1 +
sysdeps/x86_64/multiarch/memcpy_chk.c | 4 ++++
sysdeps/x86_64/multiarch/memmove_chk.c | 4 ++++
sysdeps/x86_64/multiarch/mempcpy_chk.c | 4 ++++
sysdeps/x86_64/multiarch/memset_chk.c | 4 ++++
28 files changed, 58 insertions(+), 1 deletion(-)
diff --git a/debug/memcpy_chk.c b/debug/memcpy_chk.c
index c6dd94c83f..1e4a82c063 100644
--- a/debug/memcpy_chk.c
+++ b/debug/memcpy_chk.c
@@ -28,3 +28,4 @@ __memcpy_chk (void *dstpp, const void *srcpp, size_t len, size_t dstlen)
return memcpy (dstpp, srcpp, len);
}
+libc_hidden_builtin_def (__memcpy_chk)
diff --git a/debug/memmove_chk.c b/debug/memmove_chk.c
index 8922a1ba26..b714aa474c 100644
--- a/debug/memmove_chk.c
+++ b/debug/memmove_chk.c
@@ -32,3 +32,4 @@ MEMMOVE_CHK (void *dest, const void *src, size_t len, size_t destlen)
return memmove (dest, src, len);
}
+libc_hidden_builtin_def (MEMMOVE_CHK)
diff --git a/debug/mempcpy_chk.c b/debug/mempcpy_chk.c
index 17a46a3b4d..b47b14ee9a 100644
--- a/debug/mempcpy_chk.c
+++ b/debug/mempcpy_chk.c
@@ -29,3 +29,4 @@ __mempcpy_chk (void *dstpp, const void *srcpp, size_t len, size_t dstlen)
return __mempcpy (dstpp, srcpp, len);
}
+libc_hidden_builtin_def (__mempcpy_chk)
diff --git a/debug/memset_chk.c b/debug/memset_chk.c
index 4fc0b55d82..93901f5f34 100644
--- a/debug/memset_chk.c
+++ b/debug/memset_chk.c
@@ -26,3 +26,4 @@ __memset_chk (void *dstpp, int c, size_t len, size_t dstlen)
return memset (dstpp, c, len);
}
+libc_hidden_builtin_def (__memset_chk)
diff --git a/debug/stpcpy_chk.c b/debug/stpcpy_chk.c
index 230b52bd01..518dd78dca 100644
--- a/debug/stpcpy_chk.c
+++ b/debug/stpcpy_chk.c
@@ -32,3 +32,4 @@ __stpcpy_chk (char *dest, const char *src, size_t destlen)
return memcpy (dest, src, len + 1) + len;
}
+libc_hidden_builtin_def (__stpcpy_chk)
diff --git a/include/string.h b/include/string.h
index 0c78ad2539..659530d1aa 100644
--- a/include/string.h
+++ b/include/string.h
@@ -208,6 +208,13 @@ extern char *__strcat_chk (char *__restrict __dest,
extern char *__strncat_chk (char *__restrict __dest,
const char *__restrict __src,
size_t __len, size_t __destlen) __THROW;
+
+libc_hidden_builtin_proto (__memcpy_chk)
+libc_hidden_builtin_proto (__memmove_chk)
+libc_hidden_builtin_proto (__mempcpy_chk)
+libc_hidden_builtin_proto (__memset_chk)
+libc_hidden_builtin_proto (__stpcpy_chk)
+
#endif
#endif
diff --git a/sysdeps/i386/i586/memcpy.S b/sysdeps/i386/i586/memcpy.S
index 58061d5adf..e3405e577c 100644
--- a/sysdeps/i386/i586/memcpy.S
+++ b/sysdeps/i386/i586/memcpy.S
@@ -32,6 +32,7 @@ ENTRY (__memcpy_chk)
cmpl %eax, 16(%esp)
jb HIDDEN_JUMPTARGET (__chk_fail)
END (__memcpy_chk)
+libc_hidden_builtin_def (__memcpy_chk)
#endif
ENTRY (memcpy)
diff --git a/sysdeps/i386/i586/memset.S b/sysdeps/i386/i586/memset.S
index 413e8ec6a9..f1f0e1a99b 100644
--- a/sysdeps/i386/i586/memset.S
+++ b/sysdeps/i386/i586/memset.S
@@ -33,6 +33,7 @@ ENTRY (__memset_chk)
cmpl %eax, 16(%esp)
jb HIDDEN_JUMPTARGET (__chk_fail)
END (__memset_chk)
+libc_hidden_builtin_def (__memset_chk)
#endif
ENTRY (memset)
diff --git a/sysdeps/i386/i686/memcpy.S b/sysdeps/i386/i686/memcpy.S
index 604d3088f6..9b48ec0ea1 100644
--- a/sysdeps/i386/i686/memcpy.S
+++ b/sysdeps/i386/i686/memcpy.S
@@ -33,6 +33,7 @@ ENTRY_CHK (__memcpy_chk)
cmpl %eax, 16(%esp)
jb HIDDEN_JUMPTARGET (__chk_fail)
END_CHK (__memcpy_chk)
+libc_hidden_builtin_def (__memcpy_chk)
#endif
ENTRY (memcpy)
diff --git a/sysdeps/i386/i686/memmove.S b/sysdeps/i386/i686/memmove.S
index cff06c27e5..06fe2a7668 100644
--- a/sysdeps/i386/i686/memmove.S
+++ b/sysdeps/i386/i686/memmove.S
@@ -35,6 +35,7 @@ ENTRY_CHK (__memmove_chk)
cmpl %eax, 16(%esp)
jb HIDDEN_JUMPTARGET (__chk_fail)
END_CHK (__memmove_chk)
+libc_hidden_builtin_def (__memmove_chk)
#endif
ENTRY (memmove)
diff --git a/sysdeps/i386/i686/mempcpy.S b/sysdeps/i386/i686/mempcpy.S
index af3f2cca08..26f8501e7d 100644
--- a/sysdeps/i386/i686/mempcpy.S
+++ b/sysdeps/i386/i686/mempcpy.S
@@ -33,6 +33,7 @@ ENTRY_CHK (__mempcpy_chk)
cmpl %eax, 16(%esp)
jb HIDDEN_JUMPTARGET (__chk_fail)
END_CHK (__mempcpy_chk)
+libc_hidden_builtin_def (__mempcpy_chk)
#endif
ENTRY (__mempcpy)
diff --git a/sysdeps/i386/i686/memset.S b/sysdeps/i386/i686/memset.S
index d4891880d7..0b5e671d83 100644
--- a/sysdeps/i386/i686/memset.S
+++ b/sysdeps/i386/i686/memset.S
@@ -33,6 +33,7 @@ ENTRY_CHK (__memset_chk)
cmpl %eax, 16(%esp)
jb HIDDEN_JUMPTARGET (__chk_fail)
END_CHK (__memset_chk)
+libc_hidden_builtin_def (__memset_chk)
#endif
ENTRY (memset)
diff --git a/sysdeps/i386/i686/multiarch/memcpy_chk.c b/sysdeps/i386/i686/multiarch/memcpy_chk.c
index 5ac5cb1d7a..ec945dc91f 100644
--- a/sysdeps/i386/i686/multiarch/memcpy_chk.c
+++ b/sysdeps/i386/i686/multiarch/memcpy_chk.c
@@ -28,4 +28,8 @@
libc_ifunc_redirected (__redirect_memcpy_chk, __memcpy_chk,
IFUNC_SELECTOR ());
+# ifdef SHARED
+__hidden_ver1 (__memcpy_chk, __GI___memcpy_chk, __redirect_memcpy_chk)
+ __attribute__ ((visibility ("hidden"))) __attribute_copy__ (__memcpy_chk);
+# endif
#endif
diff --git a/sysdeps/i386/i686/multiarch/memmove_chk.c b/sysdeps/i386/i686/multiarch/memmove_chk.c
index 28161d3c27..55c7601d5d 100644
--- a/sysdeps/i386/i686/multiarch/memmove_chk.c
+++ b/sysdeps/i386/i686/multiarch/memmove_chk.c
@@ -28,4 +28,8 @@
libc_ifunc_redirected (__redirect_memmove_chk, __memmove_chk,
IFUNC_SELECTOR ());
+# ifdef SHARED
+__hidden_ver1 (__memmove_chk, __GI___memmove_chk, __redirect_memmove_chk)
+ __attribute__ ((visibility ("hidden"))) __attribute_copy__ (__memmove_chk);
+# endif
#endif
diff --git a/sysdeps/i386/i686/multiarch/mempcpy_chk.c b/sysdeps/i386/i686/multiarch/mempcpy_chk.c
index 36c81ae61a..83569cf9d9 100644
--- a/sysdeps/i386/i686/multiarch/mempcpy_chk.c
+++ b/sysdeps/i386/i686/multiarch/mempcpy_chk.c
@@ -28,4 +28,8 @@
libc_ifunc_redirected (__redirect_mempcpy_chk, __mempcpy_chk,
IFUNC_SELECTOR ());
+# ifdef SHARED
+__hidden_ver1 (__mempcpy_chk, __GI___mempcpy_chk, __redirect_mempcpy_chk)
+ __attribute__ ((visibility ("hidden"))) __attribute_copy__ (__mempcpy_chk);
+# endif
#endif
diff --git a/sysdeps/i386/i686/multiarch/memset_chk.c b/sysdeps/i386/i686/multiarch/memset_chk.c
index cf3e811327..1a7503858d 100644
--- a/sysdeps/i386/i686/multiarch/memset_chk.c
+++ b/sysdeps/i386/i686/multiarch/memset_chk.c
@@ -28,5 +28,8 @@
libc_ifunc_redirected (__redirect_memset_chk, __memset_chk,
IFUNC_SELECTOR ());
-
+# ifdef SHARED
+__hidden_ver1 (__memset_chk, __GI___memset_chk, __redirect_memset_chk)
+ __attribute__ ((visibility ("hidden"))) __attribute_copy__ (__memset_chk);
+# endif
#endif
diff --git a/sysdeps/i386/memcpy_chk.S b/sysdeps/i386/memcpy_chk.S
index b5244cc69b..7b12c12aba 100644
--- a/sysdeps/i386/memcpy_chk.S
+++ b/sysdeps/i386/memcpy_chk.S
@@ -31,4 +31,5 @@ ENTRY (__memcpy_chk)
jb __chk_fail
jmp memcpy
END (__memcpy_chk)
+libc_hidden_builtin_def (__memcpy_chk)
#endif
diff --git a/sysdeps/i386/memmove_chk.S b/sysdeps/i386/memmove_chk.S
index 517d8cb15a..604aea8305 100644
--- a/sysdeps/i386/memmove_chk.S
+++ b/sysdeps/i386/memmove_chk.S
@@ -30,4 +30,5 @@ ENTRY (__memmove_chk)
jb __chk_fail
jmp memmove
END (__memmove_chk)
+libc_hidden_builtin_def (MEMMOVE_CHK)
#endif
diff --git a/sysdeps/i386/mempcpy_chk.S b/sysdeps/i386/mempcpy_chk.S
index 1e9bf71bfb..276eab1e8a 100644
--- a/sysdeps/i386/mempcpy_chk.S
+++ b/sysdeps/i386/mempcpy_chk.S
@@ -30,4 +30,5 @@ ENTRY (__mempcpy_chk)
jb __chk_fail
jmp __mempcpy
END (__mempcpy_chk)
+libc_hidden_builtin_def (__mempcpy_chk)
#endif
diff --git a/sysdeps/i386/memset_chk.S b/sysdeps/i386/memset_chk.S
index 0e6060a0a6..a2e9208e1c 100644
--- a/sysdeps/i386/memset_chk.S
+++ b/sysdeps/i386/memset_chk.S
@@ -30,4 +30,5 @@ ENTRY (__memset_chk)
jb __chk_fail
jmp memset
END (__memset_chk)
+libc_hidden_builtin_def (__memset_chk)
#endif
diff --git a/sysdeps/x86_64/memcpy_chk.S b/sysdeps/x86_64/memcpy_chk.S
index 25cbeb37ee..43843a7abb 100644
--- a/sysdeps/x86_64/memcpy_chk.S
+++ b/sysdeps/x86_64/memcpy_chk.S
@@ -30,4 +30,5 @@ ENTRY (__memcpy_chk)
jb __chk_fail
jmp memcpy
END (__memcpy_chk)
+libc_hidden_builtin_def (__memcpy_chk)
#endif
diff --git a/sysdeps/x86_64/memmove_chk.S b/sysdeps/x86_64/memmove_chk.S
index 165d42cfa8..37e2c30ba8 100644
--- a/sysdeps/x86_64/memmove_chk.S
+++ b/sysdeps/x86_64/memmove_chk.S
@@ -30,4 +30,5 @@ ENTRY (__memmove_chk)
jb __chk_fail
jmp memmove
END (__memmove_chk)
+libc_hidden_builtin_def (MEMMOVE_CHK)
#endif
diff --git a/sysdeps/x86_64/mempcpy_chk.S b/sysdeps/x86_64/mempcpy_chk.S
index b60ee4ff08..facdac50d8 100644
--- a/sysdeps/x86_64/mempcpy_chk.S
+++ b/sysdeps/x86_64/mempcpy_chk.S
@@ -30,4 +30,5 @@ ENTRY (__mempcpy_chk)
jb __chk_fail
jmp __mempcpy
END (__mempcpy_chk)
+libc_hidden_builtin_def (__mempcpy_chk)
#endif
diff --git a/sysdeps/x86_64/memset_chk.S b/sysdeps/x86_64/memset_chk.S
index ed53b8927f..c927884b1a 100644
--- a/sysdeps/x86_64/memset_chk.S
+++ b/sysdeps/x86_64/memset_chk.S
@@ -30,4 +30,5 @@ ENTRY (__memset_chk)
jb __chk_fail
jmp memset
END (__memset_chk)
+libc_hidden_builtin_def (__memset_chk)
#endif
diff --git a/sysdeps/x86_64/multiarch/memcpy_chk.c b/sysdeps/x86_64/multiarch/memcpy_chk.c
index 5ac5cb1d7a..ec945dc91f 100644
--- a/sysdeps/x86_64/multiarch/memcpy_chk.c
+++ b/sysdeps/x86_64/multiarch/memcpy_chk.c
@@ -28,4 +28,8 @@
libc_ifunc_redirected (__redirect_memcpy_chk, __memcpy_chk,
IFUNC_SELECTOR ());
+# ifdef SHARED
+__hidden_ver1 (__memcpy_chk, __GI___memcpy_chk, __redirect_memcpy_chk)
+ __attribute__ ((visibility ("hidden"))) __attribute_copy__ (__memcpy_chk);
+# endif
#endif
diff --git a/sysdeps/x86_64/multiarch/memmove_chk.c b/sysdeps/x86_64/multiarch/memmove_chk.c
index 28161d3c27..55c7601d5d 100644
--- a/sysdeps/x86_64/multiarch/memmove_chk.c
+++ b/sysdeps/x86_64/multiarch/memmove_chk.c
@@ -28,4 +28,8 @@
libc_ifunc_redirected (__redirect_memmove_chk, __memmove_chk,
IFUNC_SELECTOR ());
+# ifdef SHARED
+__hidden_ver1 (__memmove_chk, __GI___memmove_chk, __redirect_memmove_chk)
+ __attribute__ ((visibility ("hidden"))) __attribute_copy__ (__memmove_chk);
+# endif
#endif
diff --git a/sysdeps/x86_64/multiarch/mempcpy_chk.c b/sysdeps/x86_64/multiarch/mempcpy_chk.c
index 36c81ae61a..83569cf9d9 100644
--- a/sysdeps/x86_64/multiarch/mempcpy_chk.c
+++ b/sysdeps/x86_64/multiarch/mempcpy_chk.c
@@ -28,4 +28,8 @@
libc_ifunc_redirected (__redirect_mempcpy_chk, __mempcpy_chk,
IFUNC_SELECTOR ());
+# ifdef SHARED
+__hidden_ver1 (__mempcpy_chk, __GI___mempcpy_chk, __redirect_mempcpy_chk)
+ __attribute__ ((visibility ("hidden"))) __attribute_copy__ (__mempcpy_chk);
+# endif
#endif
diff --git a/sysdeps/x86_64/multiarch/memset_chk.c b/sysdeps/x86_64/multiarch/memset_chk.c
index d81147a70c..1a7503858d 100644
--- a/sysdeps/x86_64/multiarch/memset_chk.c
+++ b/sysdeps/x86_64/multiarch/memset_chk.c
@@ -28,4 +28,8 @@
libc_ifunc_redirected (__redirect_memset_chk, __memset_chk,
IFUNC_SELECTOR ());
+# ifdef SHARED
+__hidden_ver1 (__memset_chk, __GI___memset_chk, __redirect_memset_chk)
+ __attribute__ ((visibility ("hidden"))) __attribute_copy__ (__memset_chk);
+# endif
#endif
--
2.41.0
next prev parent reply other threads:[~2023-06-28 8:42 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 with _FORTIFY_SOURCE 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 ` Frédéric Bérat [this message]
2023-06-30 15:06 ` [PATCH v3 04/16] string: Ensure *_chk routines have their hidden builtin definition available 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 ` [PATCH v3 08/16] wchar: Avoid PLT entries with _FORTIFY_SOURCE Frédéric Bérat
2023-06-30 15:17 ` 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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