chg: unused .. but not for long

[proxmark3-svn] / armsrc / start.c

diff --git a/armsrc/start.c b/armsrc/start.c
index 52296fc206323178d8fb48c18e14c5c20be1e903..d2e4ed4c4acad81b1e895abab674c8eed8f7109c 100644 (file)
--- a/armsrc/start.c
+++ b/armsrc/start.c
@@ -1,12 +1,84 @@
-//-----------------------------------------------------------------------------\r
-// Just vector to AppMain(). This is in its own file so that I can place it\r
-// with the linker script.\r
-// Jonathan Westhues, Mar 2006\r
-//-----------------------------------------------------------------------------\r
-#include <proxmark3.h>\r
-#include "apps.h"\r
-\r
-void Vector(void)\r
-{\r
-       AppMain();\r
-}\r
+//-----------------------------------------------------------------------------
+// Jonathan Westhues, Mar 2006
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Just vector to AppMain(). This is in its own file so that I can place it
+// with the linker script.
+//-----------------------------------------------------------------------------
+
+#ifndef __START_H
+#define __START_H
+
+#include "proxmark3.h"
+#include "apps.h"
+#include "zlib.h"
+#include "BigBuf.h"
+
+static uint8_t *next_free_memory;
+extern struct common_area common_area;
+extern char __data_src_start__, __data_start__, __data_end__, __bss_start__, __bss_end__;
+
+static voidpf inflate_malloc(voidpf opaque, uInt items, uInt size)
+{
+       uint8_t *allocated_memory;
+       
+       allocated_memory = next_free_memory;
+       next_free_memory += items*size;
+       return allocated_memory;
+}
+
+static void inflate_free(voidpf opaque, voidpf address)
+{
+       // nothing to do
+}
+
+static void uncompress_data_section(void)
+{
+       z_stream data_section;
+
+       next_free_memory = BigBuf_get_addr();
+       
+       // initialize zstream structure
+       data_section.next_in = (uint8_t *) &__data_src_start__;
+       data_section.avail_in = &__data_end__ - &__data_start__;  // uncompressed size. Wrong but doesn't matter.
+       data_section.next_out = (uint8_t *) &__data_start__;
+       data_section.avail_out = &__data_end__ - &__data_start__;  // uncompressed size. Correct.
+       data_section.zalloc = &inflate_malloc;
+       data_section.zfree = &inflate_free;
+       data_section.opaque = NULL;
+
+       // initialize zlib for inflate
+       inflateInit2(&data_section, 15);
+
+       // uncompress data segment to RAM
+       inflate(&data_section, Z_FINISH);
+       
+       // save the size of the compressed data section
+       common_area.arg1 = data_section.total_in;
+}
+
+void __attribute__((section(".startos"))) Vector(void)
+{
+       /* Stack should have been set up by the bootloader */
+       // char *src;
+       char *dst, *end;
+       
+       uncompress_data_section();
+
+       /* Set up (that is: clear) BSS. */
+       dst = &__bss_start__;
+       end = &__bss_end__;
+       while(dst < end) *dst++ = 0;
+
+       // Set up data segment: Copy from flash to ram
+       // src = &__data_src_start__;
+       // dst = &__data_start__;
+       // end = &__data_end__;
+       // while(dst < end) *dst++ = *src++;
+
+       AppMain();
+}
+#endif
\ No newline at end of file