From 720480934ab9107714f1ffc29222dfb5d3bc5b1d Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Fri, 26 Jun 2020 16:06:49 -0300 Subject: 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 --- sysdeps/unix/sysv/linux/sparc/sparc32/brk.c | 54 -------------------------- sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h | 3 ++ 2 files changed, 3 insertions(+), 54 deletions(-) delete mode 100644 sysdeps/unix/sysv/linux/sparc/sparc32/brk.c (limited to 'sysdeps/unix/sysv/linux/sparc/sparc32') diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/brk.c b/sysdeps/unix/sysv/linux/sparc/sparc32/brk.c deleted file mode 100644 index ba9a616f74..0000000000 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/brk.c +++ /dev/null @@ -1,54 +0,0 @@ -/* brk system call for Linux/SPARC. - Copyright (C) 1995-2020 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Miguel de Icaza (miguel@nuclecu.unam.mx) - - 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 - . */ - -#include -#include -#include - -/* 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) -{ - void *newbrk; - - { - register void *o0 __asm__("%o0") = addr; - register int g1 __asm__("%g1") = __NR_brk; - __asm ("t 0x10" : "=r"(o0) : "r"(g1), "0"(o0) : "cc"); - newbrk = o0; - } - - __curbrk = newbrk; - - if (newbrk < addr) - { - __set_errno (ENOMEM); - return -1; - } - - return 0; -} -weak_alias (__brk, brk) diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h b/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h index 2c3754770b..018ee5781e 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h @@ -121,6 +121,9 @@ ENTRY(name); \ "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \ "cc", "memory" +#undef HAVE_INTERNAL_BRK_ADDR_SYMBOL +#define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 + #endif /* __ASSEMBLER__ */ /* Pointer mangling support. */ -- cgit 1.4.1