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author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2020-06-26 16:06:49 -0300 |
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committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2020-12-10 17:42:37 -0300 |
commit | 720480934ab9107714f1ffc29222dfb5d3bc5b1d (patch) | |
tree | 3851a6f8fe50b3548e667651805dadb7c242f43b /sysdeps/unix/sysv/linux/generic | |
parent | 880433de13fa31e52587720f81b762a6c7797e4e (diff) | |
download | glibc-720480934ab9107714f1ffc29222dfb5d3bc5b1d.zip glibc-720480934ab9107714f1ffc29222dfb5d3bc5b1d.tar.gz glibc-720480934ab9107714f1ffc29222dfb5d3bc5b1d.tar.bz2 |
linux: Consolidate brk implementation
It removes all the arch-specific assembly implementation. The
outliers are alpha, where its kernel ABI explict return -ENOMEM
in case of failure; and i686, where it can't use
"call *%gs:SYSINFO_OFFSET" during statup in static PIE.
Also some ABIs exports an additional ___brk_addr symbol and to
handle it an internal HAVE_INTERNAL_BRK_ADDR_SYMBOL is added.
Checked on x86_64-linux-gnu, i686-linux-gnu, adn with builsd for
the affected ABIs.
Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Diffstat (limited to 'sysdeps/unix/sysv/linux/generic')
-rw-r--r-- | sysdeps/unix/sysv/linux/generic/brk.c | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/sysdeps/unix/sysv/linux/generic/brk.c b/sysdeps/unix/sysv/linux/generic/brk.c deleted file mode 100644 index 40a80ab..0000000 --- a/sysdeps/unix/sysv/linux/generic/brk.c +++ /dev/null @@ -1,43 +0,0 @@ -/* Copyright (C) 2011-2020 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library. If not, see - <https://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <unistd.h> -#include <sysdep.h> - -/* This must be initialized data because commons can't have aliases. */ -void *__curbrk = 0; - -/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt - to work around different old braindamage in the old Linux ELF dynamic - linker. */ -weak_alias (__curbrk, ___brk_addr) - -int -__brk (void *addr) -{ - __curbrk = (void *) INTERNAL_SYSCALL_CALL (brk, addr); - if (__curbrk < addr) - { - __set_errno (ENOMEM); - return -1; - } - - return 0; -} -weak_alias (__brk, brk) |