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elf: Remove __libc_init_secure
After73fc4e28b9
, __libc_enable_secure_decided is always 0 and a statically linked executable may overwrite __libc_enable_secure without considering AT_SECURE. The __libc_enable_secure has been correctly initialized in _dl_aux_init, so just remove __libc_enable_secure_decided and __libc_init_secure. This allows us to remove some startup_get*id functions from22b79ed7f4
. Reviewed-by: Florian Weimer <fweimer@redhat.com>
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@ -285,9 +285,6 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL),
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}
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}
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/* Initialize very early so that tunables can use it. */
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__libc_init_secure ();
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__tunables_init (__environ);
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ARCH_INIT_CPU_FEATURES ();
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@ -26,15 +26,5 @@
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#include <startup.h>
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#include <libc-internal.h>
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/* If nonzero __libc_enable_secure is already set. */
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int __libc_enable_secure_decided;
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/* Safest assumption, if somehow the initializer isn't run. */
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int __libc_enable_secure = 1;
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void
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__libc_init_secure (void)
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{
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if (__libc_enable_secure_decided == 0)
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__libc_enable_secure = (startup_geteuid () != startup_getuid ()
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|| startup_getegid () != startup_getgid ());
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}
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@ -21,9 +21,6 @@
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#include <hp-timing.h>
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/* Initialize the `__libc_enable_secure' flag. */
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extern void __libc_init_secure (void);
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/* Discover the tick frequency of the machine if something goes wrong,
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we return 0, an impossible hertz. */
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extern int __profile_frequency (void);
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@ -192,7 +192,6 @@ libc_hidden_proto (__tcsetpgrp)
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and some functions contained in the C library ignore various
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environment variables that normally affect them. */
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extern int __libc_enable_secure attribute_relro;
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extern int __libc_enable_secure_decided;
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rtld_hidden_proto (__libc_enable_secure)
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@ -23,27 +23,3 @@
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/* Use macro instead of inline function to avoid including <stdio.h>. */
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#define _startup_fatal(message) __libc_fatal ((message))
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static inline uid_t
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startup_getuid (void)
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{
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return __getuid ();
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}
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static inline uid_t
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startup_geteuid (void)
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{
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return __geteuid ();
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}
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static inline gid_t
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startup_getgid (void)
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{
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return __getgid ();
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}
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static inline gid_t
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startup_getegid (void)
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{
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return __getegid ();
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}
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@ -1,30 +0,0 @@
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/* Define and initialize the `__libc_enable_secure' flag. Hurd version.
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Copyright (C) 1998-2022 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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/* There is no need for this file in the Hurd; it is just a placeholder
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to prevent inclusion of the sysdeps/generic version.
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In the shared library, the `__libc_enable_secure' variable is defined
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by the dynamic linker in dl-sysdep.c and set there.
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In the static library, it is defined in init-first.c and set there. */
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#include <libc-internal.h>
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void
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__libc_init_secure (void)
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{
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}
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@ -38,10 +38,6 @@ extern void __init_misc (int, char **, char **);
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unsigned long int __hurd_threadvar_stack_offset;
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unsigned long int __hurd_threadvar_stack_mask;
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#ifndef SHARED
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int __libc_enable_secure;
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#endif
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extern int __libc_argc attribute_hidden;
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extern char **__libc_argv attribute_hidden;
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extern char **_dl_argv;
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@ -32,30 +32,6 @@ _startup_fatal (const char *message __attribute__ ((unused)))
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ABORT_INSTRUCTION;
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__builtin_unreachable ();
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}
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static inline uid_t
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startup_getuid (void)
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{
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return (uid_t) INTERNAL_SYSCALL_CALL (getuid32);
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}
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static inline uid_t
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startup_geteuid (void)
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{
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return (uid_t) INTERNAL_SYSCALL_CALL (geteuid32);
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}
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static inline gid_t
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startup_getgid (void)
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{
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return (gid_t) INTERNAL_SYSCALL_CALL (getgid32);
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}
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static inline gid_t
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startup_getegid (void)
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{
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return (gid_t) INTERNAL_SYSCALL_CALL (getegid32);
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}
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#else
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# include_next <startup.h>
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#endif
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