proxmark3/armsrc/start.c

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//-----------------------------------------------------------------------------
// 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"
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#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 */
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// 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;
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// 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