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https://github.com/RfidResearchGroup/proxmark3.git
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74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
//-----------------------------------------------------------------------------
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// Jonathan Westhues, Mar 2006
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//
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// This code is licensed to you under the terms of the GNU GPL, version 2 or,
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// at your option, any later version. See the LICENSE.txt file for the text of
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// the license.
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//-----------------------------------------------------------------------------
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// Just vector to AppMain(). This is in its own file so that I can place it
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// with the linker script.
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//-----------------------------------------------------------------------------
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#ifndef __START_H
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#define __START_H
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#include "proxmark3_arm.h"
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#include "appmain.h"
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#ifndef WITH_NO_COMPRESSION
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#include "lz4.h"
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#endif
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#include "BigBuf.h"
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#include "string.h"
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extern struct common_area common_area;
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extern char __data_src_start__, __data_start__, __data_end__, __bss_start__, __bss_end__;
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#ifndef WITH_NO_COMPRESSION
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static void uncompress_data_section(void) {
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int avail_in;
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memcpy(&avail_in, &__data_src_start__, sizeof(int));
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int avail_out = &__data_end__ - &__data_start__; // uncompressed size. Correct.
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// uncompress data segment to RAM
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uintptr_t p = (uintptr_t)&__data_src_start__;
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int res = LZ4_decompress_safe((char *)p + 4, &__data_start__, avail_in, avail_out);
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if (res < 0)
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return;
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// save the size of the compressed data section
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common_area.arg1 = avail_in;
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}
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#endif
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void __attribute__((section(".startos"))) Vector(void);
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void Vector(void) {
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/* Stack should have been set up by the bootloader */
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if (common_area.magic != COMMON_AREA_MAGIC || common_area.version != 1) {
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/* Initialize common area */
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memset(&common_area, 0, sizeof(common_area));
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common_area.magic = COMMON_AREA_MAGIC;
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common_area.version = 1;
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}
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common_area.flags.osimage_present = 1;
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#ifdef WITH_NO_COMPRESSION
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/* Set up data segment: Copy from flash to ram */
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char *src = &__data_src_start__;
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char *dst = &__data_start__;
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char *end = &__data_end__;
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while(dst < end) *dst++ = *src++;
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dst = &__bss_start__;
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end = &__bss_end__;
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#else
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uncompress_data_section();
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/* Set up (that is: clear) BSS. */
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char *dst = &__bss_start__;
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char *end = &__bss_end__;
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#endif
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while (dst < end) *dst++ = 0;
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AppMain();
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}
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#endif
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