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add lz4 to arm side

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slurdge 2020-06-05 16:24:05 +02:00
commit 1a8eff5d42
5 changed files with 78 additions and 79 deletions
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39
armsrc/start.c
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@ -14,49 +14,28 @@
#include "proxmark3_arm.h"
#include "appmain.h"
#include "zlib.h"
#include "lz4.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;
int avail_in = *(&__data_start__ + 3);
avail_in = (avail_in << 8) + *(&__data_start__+2);
avail_in = (avail_in << 8) + *(&__data_start__+1);
avail_in = (avail_in << 8) + *(&__data_start__+0); // compressed size. Correct.
int avail_out = &__data_end__ - &__data_start__; // uncompressed size. Correct.
// uncompress data segment to RAM
int res = LZ4_decompress_safe(&__data_src_start__ + 4, &__data_start__, avail_in, avail_out);
// initialize zlib for inflate
int res = inflateInit2(&data_section, 15);
if (res < 0)
return;
// 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;
common_area.arg1 = res;
}
void __attribute__((section(".startos"))) Vector(void);