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95a7339258
The function maybe_enable_malloc_check, which is called by __tunables_init, calls __access_noerrno. It isn't problem when symbol is is in ld.so, which has a special version of __access_noerrno without stack protector. But when glibc is built with stack protector, maybe_enable_malloc_check in libc.a can't call the regular version of __access_noerrno with stack protector. This patch changes how Linux defines the __access_noerrno to be an inline call instead and thus preventing defining different build rules for ld/static and shared. H.J. Lu <hongjiu.lu@intel.com> Adhemerval Zanella <adhemerval.zanella@linaro.org> [BZ #21744] * elf/dl-tunables.c: Include not-errno.h header. * include/unistd.h (__access_noerrno): Remove definition. * sysdeps/unix/sysv/linux/access.c (__access_noerrno): Likewise. * sysdeps/generic/not-errno.h: New file. * sysdeps/unix/sysv/linux/not-errno.h: Likewise.
36 lines
1.4 KiB
C
36 lines
1.4 KiB
C
/* Syscall wrapper that do not set errno. Linux version.
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Copyright (C) 2017 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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<http://www.gnu.org/licenses/>. */
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/* This function is used on maybe_enable_malloc_check (elf/dl-tunables.c)
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and to avoid having to build/use multiple versions if stack protection
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in enabled it is defined as inline. */
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static inline int
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__access_noerrno (const char *pathname, int mode)
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{
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int res;
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INTERNAL_SYSCALL_DECL (err);
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#ifdef __NR_access
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res = INTERNAL_SYSCALL_CALL (access, err, pathname, mode);
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#else
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res = INTERNAL_SYSCALL_CALL (faccessat, err, AT_FDCWD, pathname, mode);
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#endif
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if (INTERNAL_SYSCALL_ERROR_P (res, err))
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return INTERNAL_SYSCALL_ERRNO (res, err);
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return 0;
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}
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