sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 69 insertions, 0 deletions

diff --git a/device/include/pic14/pic14_malloc.h b/device/include/pic14/pic14_malloc.h
new file mode 100644
index 0000000..711e0f9
--- /dev/null
+++ b/device/include/pic14/pic14_malloc.h
@@ -0,0 +1,69 @@
+/*-------------------------------------------------------------------------
+   malloc.h - dynamic memory allocation header
+
+   Copyright (C) 2004, Vangelis Rokas <vrokas AT otenet.gr>
+
+   Modifications for PIC14 by
+   Copyright (C) 2019 Gonzalo Pérez de Olaguer Córdoba <salo@gpoc.es>
+
+   This library is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by the
+   Free Software Foundation; either version 2, or (at your option) any
+   later version.
+
+   This 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License 
+   along with this library; see the file COPYING. If not, write to the
+   Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA.
+
+   As a special exception, if you link this library with other files,
+   some of which are compiled with SDCC, to produce an executable,
+   this library does not by itself cause the resulting executable to
+   be covered by the GNU General Public License. This exception does
+   not however invalidate any other reasons why the executable file
+   might be covered by the GNU General Public License.
+-------------------------------------------------------------------------*/
+
+/*
+ * WARNING: This file is only for internal use of the PIC14 C library.
+ */
+
+#ifndef __PIC14_MALLOC_H__
+#define __PIC14_MALLOC_H__
+
+#include <stdlib.h>
+
+#define MAX_BLOCK_SIZE  80    /* limited to one bank */
+#define MAX_HEAP_SIZE   80    /* limited to one bank */
+
+#define ALLOC_FLAG      0x80
+
+/* memory block header, max size 127 bytes, 126 usable */
+typedef union {
+  unsigned char datum;
+  struct {
+    unsigned count: 7;    /* 0: last block, else block size including this header */
+    unsigned alloc: 1;    /* 0: free, 1: allocated */
+  } bits;
+} _malloc_rec;
+
+#define PTR2REC(p)    ((_malloc_rec __data *)((unsigned int)(p) - 1))
+#define REC2PTR(r)    ((void __data *)((unsigned int)(r) + 1))
+#define NEXTREC(r)    ((_malloc_rec __data *)((unsigned int)(r) + (r)->bits.count))
+
+/* this is an external pointer to HEAP. It should be defined in
+ * the user's program, or it can be a symbol created by linker */
+extern _malloc_rec __data *_malloc_heap;
+
+/* initialize heap, should be called before any call to malloc/realloc/calloc */
+void _initHeap (void __data *ptr, size_t size);
+
+/* (re)allocate the specified block with the specified size */
+void __data *_allocateHeap (void __data *ptr, size_t size);
+
+#endif /* __PIC14_MALLOC_H__ */