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authorUlrich Drepper <drepper@redhat.com>2000-08-22 17:48:22 +0000
committerUlrich Drepper <drepper@redhat.com>2000-08-22 17:48:22 +0000
commit32b4fe6a63b7a95a8bdcd0d799a9de2106723790 (patch)
tree4b78730be20dc76f52f841805d64d391008db583 /sysdeps/unix/sysv
parentea83223c5cb7dbfbb37169baebf702484e79f014 (diff)
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Update.
* elf/Makefile (distribute): Add dl-osinfo.h. * sysdeps/generic/dl-osinfo.h: New file. * sysdeps/unix/sysv/linux/dl-osinfo.h: New file. * sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Use DL_SYSDEP_OSCHECK if defined. * sysdeps/unix/sysv/linux/init-first.c: Perform kernel version test only for !SHARED case. Get the code from dl-osinfo.h.
Diffstat (limited to 'sysdeps/unix/sysv')
-rw-r--r--sysdeps/unix/sysv/linux/dl-osinfo.h99
-rw-r--r--sysdeps/unix/sysv/linux/init-first.c70
2 files changed, 106 insertions, 63 deletions
diff --git a/sysdeps/unix/sysv/linux/dl-osinfo.h b/sysdeps/unix/sysv/linux/dl-osinfo.h
new file mode 100644
index 0000000000..00a6caeaa6
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/dl-osinfo.h
@@ -0,0 +1,99 @@
+/* Operating system specific code for generic dynamic loader functions.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <sys/sysctl.h>
+
+#ifdef SHARED
+/* This is the function used in the dynamic linker to print the fatal error
+ message. */
+static inline void
+__attribute__ ((__noreturn__))
+dl_fatal (const char *str)
+{
+ _dl_sysdep_output (2, str, NULL);
+ _exit (1);
+}
+#endif
+
+
+#define DL_SYSDEP_OSCHECK(FATAL) \
+ do { \
+ /* Test whether the kernel is new enough. This test is only \
+ performed if the library is not compiled to run on all \
+ kernels. */ \
+ if (__LINUX_KERNEL_VERSION > 0) \
+ { \
+ static const int sysctl_args[] = { CTL_KERN, KERN_OSRELEASE }; \
+ char buf[64]; \
+ size_t reslen = sizeof (buf); \
+ unsigned int version; \
+ int parts; \
+ char *cp; \
+ \
+ /* Try reading the number using `sysctl' first. */ \
+ if (__sysctl ((int *) sysctl_args, \
+ sizeof (sysctl_args) / sizeof (sysctl_args[0]), \
+ buf, &reslen, NULL, 0) < 0) \
+ { \
+ /* This was not successful. Now try reading the /proc \
+ filesystem. */ \
+ int fd = __open ("/proc/sys/kernel/osrelease", O_RDONLY); \
+ if (fd == -1 \
+ || (reslen = __read (fd, buf, sizeof (buf))) <= 0) \
+ /* This also didn't work. We give up since we cannot \
+ make sure the library can actually work. */ \
+ FATAL ("FATAL: cannot determine library version\n"); \
+ \
+ __close (fd); \
+ } \
+ buf[MIN (reslen, sizeof (buf) - 1)] = '\0'; \
+ \
+ /* Now convert it into a number. The string consists of at most \
+ three parts. */ \
+ version = 0; \
+ parts = 0; \
+ cp = buf; \
+ while ((*cp >= '0') && (*cp <= '9')) \
+ { \
+ unsigned int here = *cp++ - '0'; \
+ \
+ while ((*cp >= '0') && (*cp <= '9')) \
+ { \
+ here *= 10; \
+ here += *cp++ - '0'; \
+ } \
+ \
+ ++parts; \
+ version <<= 8; \
+ version |= here; \
+ \
+ if (*cp++ != '.') \
+ /* Another part following? */ \
+ break; \
+ } \
+ \
+ if (parts < 3) \
+ version <<= 8 * (3 - parts); \
+ \
+ /* Now we can test with the required version. */ \
+ if (version < __LINUX_KERNEL_VERSION) \
+ /* Not sufficent. */ \
+ FATAL ("FATAL: kernel too old\n"); \
+ } \
+ } while (0)
diff --git a/sysdeps/unix/sysv/linux/init-first.c b/sysdeps/unix/sysv/linux/init-first.c
index 2e0f7e06d7..101523faca 100644
--- a/sysdeps/unix/sysv/linux/init-first.c
+++ b/sysdeps/unix/sysv/linux/init-first.c
@@ -24,10 +24,13 @@
#include <sysdep.h>
#include <fpu_control.h>
#include <sys/param.h>
-#include <sys/sysctl.h>
#include <sys/types.h>
#include "kernel-features.h"
+#ifndef SHARED
+# include "dl-osinfo.h"
+#endif
+
extern void __libc_init_secure (void);
extern void __libc_init (int, char **, char **);
extern void __libc_global_ctors (void);
@@ -69,68 +72,9 @@ init (int argc, char **argv, char **envp)
/* Make sure we don't initialize twice. */
if (!__libc_multiple_libcs)
{
- /* Test whether the kernel is new enough. This test is only
- performed if the library is not compiled to run on all
- kernels. */
- if (__LINUX_KERNEL_VERSION > 0)
- {
- static const int sysctl_args[] = { CTL_KERN, KERN_OSRELEASE };
- char buf[64];
- size_t reslen = sizeof (buf);
- unsigned int version;
- int parts;
- char *cp;
-
- /* Try reading the number using `sysctl' first. */
- if (__sysctl ((int *) sysctl_args,
- sizeof (sysctl_args) / sizeof (sysctl_args[0]),
- buf, &reslen, NULL, 0) < 0)
- {
- /* This was not successful. Now try reading the /proc
- filesystem. */
- int fd = __open ("/proc/sys/kernel/osrelease", O_RDONLY);
- if (fd == -1
- || (reslen = __read (fd, buf, sizeof (buf))) <= 0)
- /* This also didn't work. We give up since we cannot
- make sure the library can actually work. */
- __libc_fatal ("FATAL: cannot determine library version\n");
-
- __close (fd);
- }
- buf[MIN (reslen, sizeof (buf) - 1)] = '\0';
-
- /* Now convert it into a number. The string consists of at most
- three parts. */
- version = 0;
- parts = 0;
- cp = buf;
- while ((*cp >= '0') && (*cp <= '9'))
- {
- unsigned int here = *cp++ - '0';
-
- while ((*cp >= '0') && (*cp <= '9'))
- {
- here *= 10;
- here += *cp++ - '0';
- }
-
- ++parts;
- version <<= 8;
- version |= here;
-
- if (*cp++ != '.')
- /* Another part following? */
- break;
- }
-
- if (parts < 3)
- version <<= 8 * (3 - parts);
-
- /* Now we can test with the required version. */
- if (version < __LINUX_KERNEL_VERSION)
- /* Not sufficent. */
- __libc_fatal ("FATAL: kernel too old\n");
- }
+#ifndef SHARED
+ DL_SYSDEP_OSCHECK (__libc_fatal);
+#endif
/* Set the FPU control word to the proper default value if the
kernel would use a different value. (In a static program we