From 2efbc2a7dfa35d14c29c5c66837dc09f07c949ac Mon Sep 17 00:00:00 2001
From: Jeff Johnston <jjohnstn@redhat.com>
Date: Sat, 9 Dec 2000 01:20:32 +0000
Subject: 2000-12-08  Werner Almesberger  <Werner.Almesberger@epfl.ch>

        * configure.host: Added x86 linux target.
        * libc/unix/getpass.c (_PATH_PASSWD, _PASSWORD_LEN): Default
        definitions provided if not already defined.
        * libc/sys/linux/crt0.c: New file.
        * libc/sys/linux/Makefile.am: Ditto.
        * libc/sys/linux/Makefile.in: Ditto.
        * libc/sys/linux/aclocal.m4: Ditto.
        * libc/sys/linux/brk.c: Ditto.
        * libc/sys/linux/configure: Ditto.
        * libc/sys/linux/configure.in: Ditto.
        * libc/sys/linux/getoptlong.c: Ditto.
        * libc/sys/linux/ids.c: Ditto.
        * libc/sys/linux/inode.c: Ditto.
        * libc/sys/linux/io.c: Ditto.
        * libc/sys/linux/linux.c: Ditto.
        * libc/sys/linux/process.c: Ditto.
        * libc/sys/linux/realpath.c: Ditto.
        * libc/sys/linux/select.c: Ditto.
        * libc/sys/linux/signal.c: Ditto.
        * libc/sys/linux/systat.c: Ditto.
        * libc/sys/linux/termios.c: Ditto.
        * libc/sys/linux/time.c: Ditto.
        * libc/sys/linux/wait.c: Ditto.
        * libc/sys/linux/include/alloca.h: Ditto.
        * libc/sys/linux/include/getopt.h: Ditto.
        * libc/sys/linux/include/stdint.h: Ditto.
        * libc/sys/linux/include/unistd.h: Ditto.
        * libc/sys/linux/sys/cdefs.h: Ditto.
        * libc/sys/linux/sys/dirent.h: Ditto.
        * libc/sys/linux/sys/errno.h: Ditto.
        * libc/sys/linux/sys/fcntl.h: Ditto.
        * libc/sys/linux/sys/file.h: Ditto.
        * libc/sys/linux/sys/ioctl.h: Ditto.
        * libc/sys/linux/sys/resource.h: Ditto.
        * libc/sys/linux/sys/signal.h: Ditto.
        * libc/sys/linux/sys/stat.h: Ditto.
        * libc/sys/linux/sys/syscall.h: Ditto.
        * libc/sys/linux/sys/termios.h: Ditto.
        * libc/sys/linux/sys/time.h: Ditto.
        * libc/sys/linux/sys/types.h: Ditto.
        * libc/sys/linux/sys/utmp.h: Ditto.
        * libc/sys/linux/sys/utsname.h: Ditto.
        * libc/sys/linux/sys/wait.h: Ditto.
---
 newlib/libc/sys/linux/brk.c | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 newlib/libc/sys/linux/brk.c

(limited to 'newlib/libc/sys/linux/brk.c')

diff --git a/newlib/libc/sys/linux/brk.c b/newlib/libc/sys/linux/brk.c
new file mode 100644
index 000000000..f61a0c3c0
--- /dev/null
+++ b/newlib/libc/sys/linux/brk.c
@@ -0,0 +1,41 @@
+/* libc/sys/linux/brk.c - Change data segment size */
+
+/* Written 2000 by Werner Almesberger */
+
+
+#include <stddef.h> /* for NULL */
+#include <sys/types.h>
+#include <sys/unistd.h>
+#include <sys/syscall.h>
+
+
+static char *curr_brk = NULL;
+
+
+#define __NR___brk __NR_brk /* Linux brk ain't no brk(2) */
+
+static _syscall1(void *,__brk,void *,end_data_segment)
+
+
+int brk(void *end_data_segment)
+{
+     char *new_brk;
+
+     new_brk = __brk(end_data_segment);
+     if (new_brk != end_data_segment) return -1;
+     curr_brk = new_brk;
+     return 0;
+}
+
+
+void *sbrk(size_t increment) /* SHOULD be ptrdiff_t */
+{
+    char *old_brk,*new_brk;
+
+    if (!curr_brk) curr_brk = __brk(NULL);
+    new_brk = __brk(curr_brk+increment);
+    if (new_brk != curr_brk+increment) return (void *) -1;
+    old_brk = curr_brk;
+    curr_brk = new_brk;
+    return old_brk;
+}
-- 
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