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b46d250656
The kernel version check is used to avoid glibc to run on older kernels where some syscall are not available and fallback code are not enabled to handle graciously fail. However, it does not prevent if the kernel does not correctly advertise its version through vDSO note, uname or procfs. Also kernel version checks are sometime not desirable by users, where they want to deploy on different system with different kernel version knowing the minimum set of syscall is always presented on such systems. The kernel version check has been removed along with the LD_ASSUME_KERNEL environment variable. The minimum kernel used to built glibc is still provided through NT_GNU_ABI_TAG ELF note and also printed when libc.so is issued. Checked on x86_64-linux-gnu.
77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/* Copyright (C) 1992-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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<https://www.gnu.org/licenses/>. */
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#include "version.h"
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#include <tls.h>
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#include <libc-abis.h>
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#include <gnu/libc-version.h>
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static const char __libc_release[] = RELEASE;
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static const char __libc_version[] = VERSION;
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static const char banner[] =
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"GNU C Library "PKGVERSION RELEASE" release version "VERSION".\n\
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Copyright (C) 2022 Free Software Foundation, Inc.\n\
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This is free software; see the source for copying conditions.\n\
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There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A\n\
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PARTICULAR PURPOSE.\n\
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Compiled by GNU CC version "__VERSION__".\n"
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#ifdef LIBC_ABIS_STRING
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LIBC_ABIS_STRING
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#endif
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#ifdef __LINUX_KERNEL_VERSION_STR
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"Minimum supported kernel: " __LINUX_KERNEL_VERSION_STR "\n"
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#endif
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"For bug reporting instructions, please see:\n\
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"REPORT_BUGS_TO".\n";
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#include <unistd.h>
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extern void __libc_print_version (void) attribute_hidden;
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void
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__libc_print_version (void)
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{
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__write (STDOUT_FILENO, banner, sizeof banner - 1);
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}
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extern const char *__gnu_get_libc_release (void);
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const char *
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__gnu_get_libc_release (void)
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{
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return __libc_release;
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}
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weak_alias (__gnu_get_libc_release, gnu_get_libc_release)
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extern const char *__gnu_get_libc_version (void);
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const char *
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__gnu_get_libc_version (void)
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{
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return __libc_version;
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}
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weak_alias (__gnu_get_libc_version, gnu_get_libc_version)
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/* This function is the entry point for the shared object.
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Running the library as a program will get here. */
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extern void __libc_main (void) __attribute__ ((noreturn));
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void
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__libc_main (void)
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{
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__libc_print_version ();
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_exit (0);
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}
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