From fc59b6ec5140386c0072cae932d2812015016a5b Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Tue, 15 Feb 2005 01:33:05 +0000 Subject: some source files for x86_64 --- libc/sysdeps/linux/x86_64/brk.c | 44 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 libc/sysdeps/linux/x86_64/brk.c (limited to 'libc/sysdeps/linux/x86_64/brk.c') diff --git a/libc/sysdeps/linux/x86_64/brk.c b/libc/sysdeps/linux/x86_64/brk.c new file mode 100644 index 000000000..303b5c0de --- /dev/null +++ b/libc/sysdeps/linux/x86_64/brk.c @@ -0,0 +1,44 @@ +/* brk system call for Linux/x86_64. + Copyright (C) 1995, 1996, 2000 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 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include + +/* This must be initialized data because commons can't have aliases. */ +void *__curbrk = 0; + +int brk (void *addr) +{ + void *__unbounded newbrk; + + asm ("syscall\n" + : "=a" (newbrk) + : "0" (__NR_brk), "D" (__ptrvalue (addr)) + : "r11","rcx","memory"); + + __curbrk = newbrk; + + if (newbrk < addr) { + __set_errno (ENOMEM); + return -1; + } + + return 0; +} -- cgit v1.2.3