summaryrefslogtreecommitdiff
path: root/libc/sysdeps/linux/arm
diff options
context:
space:
mode:
authorEric Andersen <andersen@codepoet.org>2002-01-21 02:39:29 +0000
committerEric Andersen <andersen@codepoet.org>2002-01-21 02:39:29 +0000
commit55497563115712ac1ec2c70713357a7489291037 (patch)
tree725de76ccf89cc82389dae206db3a77f8f86c9cf /libc/sysdeps/linux/arm
parent84fd661079f473310ea6f05771d5deea6d3c8e9c (diff)
Make sbrk common, add arm/brk.c, cleanup leftover damage
Diffstat (limited to 'libc/sysdeps/linux/arm')
-rw-r--r--libc/sysdeps/linux/arm/Makefile2
-rw-r--r--libc/sysdeps/linux/arm/brk.c47
2 files changed, 48 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/arm/Makefile b/libc/sysdeps/linux/arm/Makefile
index 539e4d692..9e826aa48 100644
--- a/libc/sysdeps/linux/arm/Makefile
+++ b/libc/sysdeps/linux/arm/Makefile
@@ -33,7 +33,7 @@ CRT0_OBJ=crt0.o
SSRC=longjmp.S setjmp.S vfork.S
SOBJS=$(patsubst %.S,%.o, $(SSRC))
-CSRC=inout_bwl.c
+CSRC=inout_bwl.c brk.c
COBJS=$(patsubst %.c,%.o, $(CSRC))
OBJS=$(SOBJS) $(MOBJ) $(COBJS)
diff --git a/libc/sysdeps/linux/arm/brk.c b/libc/sysdeps/linux/arm/brk.c
new file mode 100644
index 000000000..0262aa110
--- /dev/null
+++ b/libc/sysdeps/linux/arm/brk.c
@@ -0,0 +1,47 @@
+/* brk system call for Linux/ARM.
+ Copyright (C) 1995, 1996 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 <errno.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+/* This must be initialized data because commons can't have aliases. */
+void *___brk_addr = 0;
+
+int brk (void *addr)
+{
+ void *newbrk;
+
+ asm ("mov a1, %1\n" /* save the argment in r0 */
+ "swi %2\n" /* do the system call */
+ "mov %0, a1;" /* keep the return value */
+ : "=r"(newbrk)
+ : "r"(addr), "i" (__NR_brk)
+ : "a1");
+
+ ___brk_addr = newbrk;
+
+ if (newbrk < addr)
+ {
+ __set_errno (ENOMEM);
+ return -1;
+ }
+
+ return 0;
+}