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authorGeoffrey Keating <geoffk@geoffk.org>2001-12-22 22:47:58 +0000
committerGeoffrey Keating <geoffk@geoffk.org>2001-12-22 22:47:58 +0000
commitf6eff1c04649af4f2a18c434d9be2870c24cc668 (patch)
treece025040088849a3c238acf2892ae64a14bf7727 /libgloss/xstormy16/sbrk.c
parenta3e320f3c9759b2ad6267daca68e24952f27d59c (diff)
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In newlib/:
2001-12-22 Geoffrey Keating <geoffk@redhat.com> Catherine Moore <clm@redhat.com> Richard Henderson <rth@redhat.com> Corinna Vinschen <vinschen@redhat.com> * configure.host: Add support for xstormy16. * libc/include/machine/ieeefp.h: Add support for xstormy16. * libc/include/machine/setjmp.h: Add support for xstormy16. * libc/include/sys/config.h: Add support for xstormy16. * libc/machine/xstormy16/Makefile.am: New file. * libc/machine/xstormy16/Makefile.in: New file. * libc/machine/xstormy16/aclocal.m4: New file. * libc/machine/xstormy16/configure: New file. * libc/machine/xstormy16/configure.in: New file. * libc/machine/xstormy16/setjmp.S: New file. In libgloss/: 2001-12-22 Geoffrey Keating <geoffk@redhat.com> Mark Salter <msalter@redhat.com> Catherine Moore <clm@redhat.com> Richard Henderson <rth@redhat.com> * configure.in: Add xstormy16. * libnosys/configure.in: Add xstormy16. * configure: Regenerated. * libnosys/configure: Regenerated. * xstormy16/Makefile.in: New file. * xstormy16/close.c: New file. * xstormy16/configure: New file. * xstormy16/configure.in: New file. * xstormy16/crt0.s: New file. * xstormy16/crt0_stub.s: New file. * xstormy16/crti.s: New file. * xstormy16/crtn.s: New file. * xstormy16/eva_app.c: New file. * xstormy16/eva_app.ld: New file. * xstormy16/eva_stub.ld: New file. * xstormy16/fstat.c: New file. * xstormy16/getpid.c: New file. * xstormy16/kill.c: New file. * xstormy16/lseek.c: New file. * xstormy16/open.c: New file. * xstormy16/sbrk.c: New file. * xstormy16/sim_high.ld: New file. * xstormy16/stat.c: New file. * xstormy16/syscalls.S: New file. * xstormy16/syscalls.m4: New file. * xstormy16/unlink.c: New file. * xstormy16/xstormy16_stub.c: New file.
Diffstat (limited to 'libgloss/xstormy16/sbrk.c')
-rw-r--r--libgloss/xstormy16/sbrk.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/libgloss/xstormy16/sbrk.c b/libgloss/xstormy16/sbrk.c
new file mode 100644
index 000000000..cb18d68bf
--- /dev/null
+++ b/libgloss/xstormy16/sbrk.c
@@ -0,0 +1,55 @@
+/* sbrk.c -- allocate memory dynamically.
+ *
+ * Copyright (c) 1995,1996 Cygnus Support
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ */
+#include <errno.h>
+#include "glue.h"
+
+/* just in case, most boards have at least some memory */
+#ifndef RAMSIZE
+# define RAMSIZE (caddr_t)0x100000
+#endif
+
+char *heap_ptr;
+
+/*
+ * sbrk -- changes heap size size. Get nbytes more
+ * RAM. We just increment a pointer in what's
+ * left of memory on the board.
+ */
+char *
+_sbrk (nbytes)
+ int nbytes;
+{
+ char *base;
+
+ if (!heap_ptr)
+ heap_ptr = (char *)&_end;
+ base = heap_ptr;
+ heap_ptr += nbytes;
+
+ return base;
+/* FIXME: We really want to make sure we don't run out of RAM, but this
+ * isn't very portable.
+ */
+#if 0
+ if ((RAMSIZE - heap_ptr - nbytes) >= 0) {
+ base = heap_ptr;
+ heap_ptr += nbytes;
+ return (base);
+ } else {
+ errno = ENOMEM;
+ return ((char *)-1);
+ }
+#endif
+}