2006-05-30 Shaun Jackman <sjackman@gmail.com>

* arm/Makefile.in: Add Linux syscall interface.
      * arm/linux-crt0.S: New file.
      * arm/linux-syscall.h: New file.
      * arm/linux-syscalls0.S: New file.
      * arm/linux-syscalls1.c: New file.

libgloss/arm/linux-syscalls1.c

@@ -0,0 +1,64 @@
+/** Linux system call interface.
+ * Written by Shaun Jackman <sjackman@gmail.com>.
+ * Copyright 2006 Pathway Connectivity
+ *
+ * Permission to use, copy, modify, and distribute this software
+ * is freely granted, provided that this notice is preserved.
+ */
+
+#include <errno.h>
+#include <stdint.h>
+
+extern char _end[];
+static void *curbrk = _end;
+
+extern void *_brk(void *addr);
+
+int brk(void *addr)
+{
+	void *newbrk;
+	if (curbrk == addr)
+		return 0;
+	newbrk = _brk(addr);
+	curbrk = newbrk;
+	if (newbrk < addr) {
+		errno = ENOMEM;
+		return -1;
+	}
+	return 0;
+}
+
+void *_sbrk(intptr_t incr)
+{
+	void *oldbrk = curbrk;
+	if (brk(oldbrk + incr) == -1)
+		return (void *)-1;
+	return oldbrk;
+}
+
+void *sbrk(intptr_t incr) __attribute__((alias("_sbrk")));
+
+int _set_errno(int n)
+{
+	if (n < 0) {
+		errno = -n;
+		return -1;
+	}
+	return n;
+}
+
+#include <sys/wait.h>
+
+struct rusage;
+
+pid_t wait4(pid_t pid, int *status, int options, struct rusage *rusage);
+
+pid_t _wait(int *status)
+{
+	return wait4(-1, status, 0, NULL);
+}
+
+pid_t waitpid(pid_t pid, int *status, int options)
+{
+	return wait4(pid, status, options, NULL);
+}