From 683158e0c42dc68e3c43a32b6e5d832c5280e94e Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sun, 3 Dec 1995 10:00:22 +0000 Subject: * sysdeps/mach/hurd/brk.c (DATA_SIZE): Bump to 128MB. (_hurd_set_brk): Try to allocate more space when we run out. * sysdeps/generic/sbrk.c: If __curbrk is zero, call __brk with zero and examine it again. * sysdeps/unix/sysv/linux/i386/brk.c: New file. * sysdeps/unix/sysv/linux/i386/brk.S: File removed. * sysdeps/unix/sysv/linux/i386/sbrk.S: File removed. * sysdeps/unix/sysv/linux/dl-sysdep.c: New file. --- sysdeps/unix/sysv/linux/i386/brk.c | 49 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/i386/brk.c (limited to 'sysdeps/unix/sysv/linux/i386/brk.c') diff --git a/sysdeps/unix/sysv/linux/i386/brk.c b/sysdeps/unix/sysv/linux/i386/brk.c new file mode 100644 index 0000000000..9963e0777b --- /dev/null +++ b/sysdeps/unix/sysv/linux/i386/brk.c @@ -0,0 +1,49 @@ +/* brk system call for Linux/i386. +Copyright (C) 1995 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include +#include +#include + +void *__curbrk; + +int +__brk (void *addr) +{ + void *newbrk, *scratch; + + asm ("movl %%ebx, %1\n" /* Save %ebx in scratch register. */ + "movl %3, %%ebx\n" /* Put ADDR in %ebx to be syscall arg. */ + "int $0x80 # %2\n" /* Perform the system call. */ + "movl %1, %%ebx\n" /* Restore %ebx from scratch register. */ + : "=a" (newbrk), "=r" (scratch) + : "0" (SYS_ify (brk)), "g" (addr)); + + __curbrk = newbrk; + + if (newbrk < addr) + { + errno = ENOMEM; + return -1; + } + + return 0; +} +weak_alias (__brk, brk) + -- cgit 1.4.1