[PATCH 017/114] Add getpagesize and sbrk syscalls for Phoenix.

[Jakub Sejdak <jakub dot sejdak at phoesys dot com>]

From: Kuba Sejdak <jakub.sejdak@phoesys.com>

---
 newlib/libc/sys/phoenix/getpagesize.c | 25 +++++++++++++++++++++
 newlib/libc/sys/phoenix/sbrk.c        | 42 +++++++++++++++++++++++++++++++++++
 2 files changed, 67 insertions(+)
 create mode 100644 newlib/libc/sys/phoenix/getpagesize.c
 create mode 100644 newlib/libc/sys/phoenix/sbrk.c

diff --git a/newlib/libc/sys/phoenix/getpagesize.c b/newlib/libc/sys/phoenix/getpagesize.c
new file mode 100644
index 0000000..bbedbf9
--- /dev/null
+++ b/newlib/libc/sys/phoenix/getpagesize.c
@@ -0,0 +1,25 @@
+/* Copyright (C) 2012-2016 Phoenix Systems (http://www.phoesys.com/).
+   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.  */
+
+#define PHOENIX_PAGESIZE		0x1000
+
+int getpagesize()
+{
+	/* TODO: consider making it a syscall. */
+	return PHOENIX_PAGESIZE;
+}
diff --git a/newlib/libc/sys/phoenix/sbrk.c b/newlib/libc/sys/phoenix/sbrk.c
new file mode 100644
index 0000000..bb47813
--- /dev/null
+++ b/newlib/libc/sys/phoenix/sbrk.c
@@ -0,0 +1,42 @@
+/* Copyright (C) 2012-2016 Phoenix Systems (http://www.phoesys.com/).
+   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 "syscall.h"
+
+#include <errno.h>
+#include <stdint.h>
+
+extern const char _end[];		/* Defined by the linker */
+
+void *sbrk(intptr_t increment)
+{
+	static char *heap_end = (char *) _end;
+	char *prev_heap_end = heap_end;
+
+	if (increment != 0) {
+		int ret= syscall2(int, SYS_SBRK, increment, heap_end);
+		if (ret != 0) {
+			errno = -ret;
+			return (void *) -1;
+		}
+
+		heap_end += increment;
+	}
+
+	return (void *) prev_heap_end;
+}
-- 
2.5.0