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Add hekate loader

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CTCaer 2020-07-04 22:12:12 +03:00
parent da0cdf1bd0
commit 1ceb380f6f
12 changed files with 1095 additions and 3 deletions
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4
.gitignore vendored
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@ -2,3 +2,7 @@
.vscode
build/*
output/*
loader/payload_00.h
loader/payload_01.h
tools/bin2c/bin2c
tools/lz/lz77

29
Makefile
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@ -78,14 +78,23 @@ LDFLAGS = $(ARCH) -nostartfiles -lgcc -Wl,--nmagic,--gc-sections -Xlinker --defs
MODULEDIRS := $(wildcard modules/*)
NYXDIR := $(wildcard nyx)
LDRDIR := $(wildcard loader)
TOOLSLZ := $(wildcard tools/lz)
TOOLSB2C := $(wildcard tools/bin2c)
TOOLS := $(TOOLSLZ) $(TOOLSB2C)
################################################################################
.PHONY: all clean $(MODULEDIRS) $(NYXDIR)
.PHONY: all clean $(MODULEDIRS) $(NYXDIR) $(LDRDIR) $(TOOLS)
all: $(TARGET).bin
all: $(TARGET).bin $(LDRDIR)
@printf ICTC49 >> $(OUTPUTDIR)/$(TARGET).bin
@echo "--------------------------------------"
@echo -n "Uncompr size: "
$(eval BIN_SIZE = $(shell wc -c < $(OUTPUTDIR)/$(TARGET)_unc.bin))
@echo $(BIN_SIZE)" Bytes"
@echo "Uncompr Max: 140288 Bytes + 3 KiB BSS"
@if [ ${BIN_SIZE} -gt 140288 ]; then echo "\e[1;33mUncompr size exceeds limit!\e[0m"; fi
@echo -n "Payload size: "
$(eval BIN_SIZE = $(shell wc -c < $(OUTPUTDIR)/$(TARGET).bin))
@echo $(BIN_SIZE)" Bytes"
@ -104,7 +113,21 @@ $(MODULEDIRS):
$(NYXDIR):
@$(MAKE) --no-print-directory -C $@ $(MAKECMDGOALS) -$(MAKEFLAGS)
$(TARGET).bin: $(BUILDDIR)/$(TARGET)/$(TARGET).elf $(MODULEDIRS) $(NYXDIR)
$(LDRDIR): $(TARGET).bin
@$(TOOLSLZ)/lz77 $(OUTPUTDIR)/$(TARGET).bin
mv $(OUTPUTDIR)/$(TARGET).bin $(OUTPUTDIR)/$(TARGET)_unc.bin
@mv $(OUTPUTDIR)/$(TARGET).bin.00.lz payload_00
@mv $(OUTPUTDIR)/$(TARGET).bin.01.lz payload_01
@$(TOOLSB2C)/bin2c payload_00 > $(LDRDIR)/payload_00.h
@$(TOOLSB2C)/bin2c payload_01 > $(LDRDIR)/payload_01.h
@rm payload_00
@rm payload_01
@$(MAKE) --no-print-directory -C $@ $(MAKECMDGOALS) -$(MAKEFLAGS) PAYLOAD_NAME=$(TARGET)
$(TOOLS):
@$(MAKE) --no-print-directory -C $@ $(MAKECMDGOALS) -$(MAKEFLAGS)
$(TARGET).bin: $(BUILDDIR)/$(TARGET)/$(TARGET).elf $(MODULEDIRS) $(NYXDIR) $(TOOLS)
$(OBJCOPY) -S -O binary $< $(OUTPUTDIR)/$@
$(BUILDDIR)/$(TARGET)/$(TARGET).elf: $(OBJS)

62
loader/Makefile Normal file
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@ -0,0 +1,62 @@
ifeq ($(strip $(DEVKITARM)),)
$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
endif
include $(DEVKITARM)/base_rules
################################################################################
LDR_LOAD_ADDR := 0x40007000
IPL_MAGIC := 0x43544349 #"ICTC"
include ../Versions.inc
################################################################################
TARGET := loader
BUILDDIR := ../build
OUTPUTDIR := ../output
BDKDIR := bdk
BDKINC := -I../$(BDKDIR)
VPATH += $(dir $(wildcard ../$(BDKDIR)/*/)) $(dir $(wildcard ../$(BDKDIR)/*/*/))
# Main and graphics.
OBJS = $(addprefix $(BUILDDIR)/$(TARGET)/, \
start.o loader.o lz.o \
)
################################################################################
CUSTOMDEFINES := -DBL_MAGIC=$(IPL_MAGIC)
CUSTOMDEFINES += -DBL_VER_MJ=$(BLVERSION_MAJOR) -DBL_VER_MN=$(BLVERSION_MINOR) -DBL_VER_HF=$(BLVERSION_HOTFX) -DBL_RESERVED=$(BLVERSION_RSVD)
ARCH := -march=armv4t -mtune=arm7tdmi -mthumb-interwork
CFLAGS = $(ARCH) -O2 -g -nostdlib -ffunction-sections -fdata-sections -fomit-frame-pointer -std=gnu11 -Wall $(CUSTOMDEFINES)
LDFLAGS = $(ARCH) -nostartfiles -lgcc -Wl,--nmagic,--gc-sections -Xlinker --defsym=LDR_LOAD_ADDR=$(LDR_LOAD_ADDR)
################################################################################
.PHONY: all clean
all: $(TARGET).bin $(TOOLSLZ) $(TOOLSB2C)
clean:
@rm -rf $(OBJS)
$(TARGET).bin: $(BUILDDIR)/$(TARGET)/$(TARGET).elf
$(OBJCOPY) -S -O binary $< $(OUTPUTDIR)/$(PAYLOAD_NAME).bin
$(BUILDDIR)/$(TARGET)/$(TARGET).elf: $(OBJS)
@$(CC) $(LDFLAGS) -T link.ld $^ -o $@
$(BUILDDIR)/$(TARGET)/%.o: %.c
@$(CC) $(CFLAGS) $(BDKINC) -c $< -o $@
$(BUILDDIR)/$(TARGET)/%.o: %.S
@$(CC) $(CFLAGS) -c $< -o $@
$(OBJS): $(BUILDDIR)/$(TARGET)
$(BUILDDIR)/$(TARGET):
@mkdir -p "$(BUILDDIR)"
@mkdir -p "$(BUILDDIR)/$(TARGET)"
@mkdir -p "$(OUTPUTDIR)"

22
loader/link.ld Normal file
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@ -0,0 +1,22 @@
ENTRY(_start)
SECTIONS {
PROVIDE(__ipl_start = LDR_LOAD_ADDR);
. = __ipl_start;
.text : {
*(.text._start);
*(._boot_cfg);
*(._ipl_version);
*(._octopus);
*(.text*);
}
.data : {
*(.data*);
*(.rodata*);
*(._payload_00);
*(._payload_01);
}
__ldr_end = .;
. = ALIGN(0x10);
__ipl_end = .;
}

107
loader/loader.c Normal file
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@ -0,0 +1,107 @@
/*
* Copyright (c) 2019 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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 program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <stdlib.h>
#include "payload_00.h"
#include "payload_01.h"
#include <memory_map.h>
#include <libs/compr/lz.h>
#include <soc/clock.h>
#include <soc/t210.h>
// 0x4003D000: Safe for panic preserving, 0x40038000: Safe for debugging needs.
#define IPL_RELOC_TOP 0x40038000
#define IPL_PATCHED_RELOC_SZ 0x94
boot_cfg_t __attribute__((section ("._boot_cfg"))) b_cfg;
const volatile ipl_ver_meta_t __attribute__((section ("._ipl_version"))) ipl_ver = {
.magic = BL_MAGIC,
.version = (BL_VER_MJ + '0') | ((BL_VER_MN + '0') << 8) | ((BL_VER_HF + '0') << 16),
.rsvd0 = 0,
.rsvd1 = 0
};
const volatile char __attribute__((section ("._octopus"))) octopus[] =
"\n"
" ___\n"
" .-' `'.\n"
" / \\\n"
" | ;\n"
" | | ___.--,\n"
" _.._ |0) = (0) | _.---'`__.-( (_.\n"
" __.--'`_.. '.__.\\ '--. \\_.-' ,.--'` `\"\"`\n"
" ( ,.--'` ',__ /./; ;, '.__.'` __\n"
" _`) ) .---.__.' / | |\\ \\__..--\"\" \"\"\"--.,_\n"
" `---' .'.''-._.-'`_./ /\\ '. \\ _.--''````'''--._`-.__.'\n"
" | | .' _.-' | | \\ \\ '. `----`\n"
" \\ \\/ .' \\ \\ '. '-._)\n"
" \\/ / \\ \\ `=.__`'-.\n"
" / /\\ `) ) / / `\"\".`\\\n"
" , _.-'.'\\ \\ / / ( ( / /\n"
" `--'` ) ) .-'.' '.'. | (\n"
" (/` ( (` ) ) '-; [switchbrew]\n";
void loader_main()
{
// Preserve sections.
__asm__ ("" : : "" (b_cfg));
__asm__ ("" : : "" (ipl_ver));
__asm__ ("" : : "" (octopus[0]));
// Preliminary BPMP clocks init.
CLOCK(CLK_RST_CONTROLLER_CLK_SYSTEM_RATE) = 0x10; // Set HCLK div to 2 and PCLK div to 1.
CLOCK(CLK_RST_CONTROLLER_CLK_SOURCE_SYS) = 0; // Set SCLK div to 1.
CLOCK(CLK_RST_CONTROLLER_SCLK_BURST_POLICY) = 0x20004444; // Set clk source to Run and PLLP_OUT2 (204MHz).
CLOCK(CLK_RST_CONTROLLER_SUPER_SCLK_DIVIDER) = 0x80000000; // Enable SUPER_SDIV to 1.
CLOCK(CLK_RST_CONTROLLER_CLK_SYSTEM_RATE) = 2; // Set HCLK div to 1 and PCLK div to 3.
CLOCK(CLK_RST_CONTROLLER_SCLK_BURST_POLICY) = 0x20003333; // Set SCLK to PLLP_OUT (408MHz).
// Get Loader and Payload size.
u32 payload_size = sizeof(payload_00) + sizeof(payload_01);
u32 *payload_addr = (u32 *)payload_00;
// Relocate payload to a safer place.
u32 bytes = ALIGN(payload_size, 4) >> 2;
u32 *addr = payload_addr + bytes - 1;
u32 *dst = (u32 *)(IPL_RELOC_TOP - 4);
while (bytes)
{
*dst = *addr;
dst--;
addr--;
bytes--;
}
// Uncompress payload parts.
u8 *src_addr = (void *)(IPL_RELOC_TOP - ALIGN(payload_size, 4));
u32 pos = LZ_Uncompress((const u8 *)src_addr, (u8*)IPL_LOAD_ADDR, sizeof(payload_00));
src_addr += (u32)payload_01 - (u32)payload_00;
LZ_Uncompress((const u8 *)src_addr, (u8*)IPL_LOAD_ADDR + pos, sizeof(payload_01));
// Copy over boot configuration storage in case it was set.
memcpy((u8 *)(IPL_LOAD_ADDR + IPL_PATCHED_RELOC_SZ), &b_cfg, sizeof(boot_cfg_t));
// Chainload.
void (*ipl_ptr)() = (void *)IPL_LOAD_ADDR;
(*ipl_ptr)();
// Halt if we managed to get out of execution.
while (true)
;
}

73
loader/start.S Normal file
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@ -0,0 +1,73 @@
/*
* Copyright (c) 2018 naehrwert
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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 program. If not, see <http://www.gnu.org/licenses/>.
*/
.section .text._start
.arm
.extern _reloc_ipl
.type _reloc_ipl, %function
.extern memset
.type memset, %function
.extern loader_main
.type loader_main, %function
.globl _start
.type _start, %function
_start:
ADR R0, _start
LDR R1, =__ipl_start
CMP R0, R1
BEQ _real_start
/* If we are not in the right location already, copy a relocator to upper IRAM. */
ADR R2, _reloc_ipl
LDR R3, =0x4003FF00
MOV R4, #(_real_start - _reloc_ipl)
_copy_loop:
LDMIA R2!, {R5}
STMIA R3!, {R5}
SUBS R4, #4
BNE _copy_loop
/* Use the relocator to copy ourselves into the right place. */
LDR R2, =__ipl_end
SUB R2, R2, R1
LDR R3, =_real_start
LDR R4, =0x4003FF00
BX R4
_reloc_ipl:
LDMIA R0!, {R4-R7}
STMIA R1!, {R4-R7}
SUBS R2, #0x10
BNE _reloc_ipl
/* Jump to the relocated entry. */
BX R3
_real_start:
/* Initially, we place our stack in IRAM but will move it to SDRAM later. */
LDR SP, =0x40007000
LDR R0, =__ldr_end
BL loader_main
B .
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0

12
tools/bin2c/Makefile Normal file
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@ -0,0 +1,12 @@
NATIVE_CC ?= gcc
.PHONY: all clean
all: bin2c
@echo > /dev/null
clean:
rm -f bin2c
bin2c: bin2c.c
@$(NATIVE_CC) -o $@ bin2c.c

77
tools/bin2c/bin2c.c Normal file
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@ -0,0 +1,77 @@
/*
* This is bin2c program, which allows you to convert binary file to
* C language array, for use as embedded resource, for instance you can
* embed graphics or audio file directly into your program.
* This is public domain software, use it on your own risk.
* Contact Serge Fukanchik at fuxx@mail.ru if you have any questions.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <ctype.h>
#include <unistd.h>
/* Replace . with _ */
char*
make_ident ( char* name )
{
char* ret;
char* p;
ret = strdup ( name );
for ( p = ret; p[0]; p++ )
{
if ( !isalnum ( p[0] ) ) p[0] = '_';
}
return ret;
}
int
main ( int argc, char* argv[] )
{
unsigned char buf[BUFSIZ];
char* ident;
int fd, i, total, rd, need_comma;
if ( argc < 2 )
{
fprintf ( stderr, "Usage: %s binary_file > output_file\n", argv[0] );
return -1;
}
fd = open ( argv[1], O_RDONLY );
if ( fd == -1 )
{
fprintf ( stderr, "%s: can't open %s for reading\n", argv[0], argv[1] );
return -1;
}
ident = make_ident ( argv[1] );
printf ( "static const unsigned char __attribute__((section (\"._%s\"))) %s[] = {", ident, ident );
for ( total = 0, need_comma = 0; ( rd = read ( fd, buf, BUFSIZ ) ) != 0; )
{
if ( rd == -1 )
{
fprintf ( stderr, "%s: file read error\n", argv[0] );
return -1;
}
for ( i = 0; i < rd; i++ )
{
if ( need_comma ) printf ( ", " );
else need_comma = 1;
if ( ( total % 11 ) == 0 ) printf ( "\n\t" );
printf ( "0x%.2x", buf[i] );
total++;
}
}
printf ( "\n};\n" );
close ( fd );
free ( ident );
return 0;
}

12
tools/lz/Makefile Normal file
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NATIVE_CC ?= gcc
.PHONY: all clean
all: lz77
@echo > /dev/null
clean:
rm -f lz77
lz77: lz.c lz77.c
@$(NATIVE_CC) -o $@ lz.c lz77.c

546
tools/lz/lz.c Normal file
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//
// Name: lz.c
// Author: Marcus Geelnard
// Description: LZ77 coder/decoder implementation.
// Reentrant: Yes
// $ATH_LICENSE_NULL$
//
// The LZ77 compression scheme is a substitutional compression scheme
// proposed by Abraham Lempel and Jakob Ziv in 1977. It is very simple in
// its design, and uses no fancy bit level compression.
//
// This is my first attempt at an implementation of a LZ77 code/decoder.
//
// The principle of the LZ77 compression algorithm is to store repeated
// occurrences of strings as references to previous occurrences of the same
// string. The point is that the reference consumes less space than the
// string itself, provided that the string is long enough (in this
// implementation, the string has to be at least 4 bytes long, since the
// minimum coded reference is 3 bytes long). Also note that the term
// "string" refers to any kind of byte sequence (it does not have to be
// an ASCII string, for instance).
//
// The coder uses a brute force approach to finding string matches in the
// history buffer (or "sliding window", if you wish), which is very, very
// slow. I recon the complexity is somewhere between O(n^2) and O(n^3),
// depending on the input data.
//
// There is also a faster implementation that uses a large working buffer
// in which a "jump table" is stored, which is used to quickly find
// possible string matches (see the source code for LZ_CompressFast() for
// more information). The faster method is an order of magnitude faster,
// but still quite slow compared to other compression methods.
//
// The upside is that decompression is very fast, and the compression ratio
// is often very good.
//
// The reference to a string is coded as a (length,offset) pair, where the
// length indicates the length of the string, and the offset gives the
// offset from the current data position. To distinguish between string
// references and literal strings (uncompressed bytes), a string reference
// is preceded by a marker byte, which is chosen as the least common byte
// symbol in the input data stream (this marker byte is stored in the
// output stream as the first byte).
//
// Occurrences of the marker byte in the stream are encoded as the marker
// byte followed by a zero byte, which means that occurrences of the marker
// byte have to be coded with two bytes.
//
// The lengths and offsets are coded in a variable length fashion, allowing
// values of any magnitude (up to 4294967295 in this implementation).
//
// With this compression scheme, the worst case compression result is
// (257/256)*insize + 1.
//
//------------------------------------------------------------------------
// Copyright (c) 2003-2006 Marcus Geelnard
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
// Marcus Geelnard
// marcus.geelnard at home.se
//
//
// This file has been altered from the original version.
//
/*************************************************************************
* Constants used for LZ77 coding
*************************************************************************/
/* Maximum offset (can be any size < 2^31). Lower values give faster
compression, while higher values gives better compression. The default
value of 100000 is quite high. Experiment to see what works best for
you. */
#define LZ_MAX_OFFSET 100000
/*************************************************************************
* INTERNAL FUNCTIONS *
*************************************************************************/
/*************************************************************************
* _LZ_StringCompare() - Return maximum length string match.
*************************************************************************/
static unsigned int _LZ_StringCompare( unsigned char * str1,
unsigned char * str2, unsigned int minlen, unsigned int maxlen )
{
unsigned int len;
for( len = minlen; (len < maxlen) && (str1[len] == str2[len]); ++ len );
return len;
}
/*************************************************************************
* _LZ_WriteVarSize() - Write unsigned integer with variable number of
* bytes depending on value.
*************************************************************************/
static int _LZ_WriteVarSize( unsigned int x, unsigned char * buf )
{
unsigned int y;
int num_bytes, i, b;
/* Determine number of bytes needed to store the number x */
y = x >> 3;
for( num_bytes = 5; num_bytes >= 2; -- num_bytes )
{
if( y & 0xfe000000 ) break;
y <<= 7;
}
/* Write all bytes, seven bits in each, with 8:th bit set for all */
/* but the last byte. */
for( i = num_bytes-1; i >= 0; -- i )
{
b = (x >> (i*7)) & 0x0000007f;
if( i > 0 )
{
b |= 0x00000080;
}
*buf ++ = (unsigned char) b;
}
/* Return number of bytes written */
return num_bytes;
}
/*************************************************************************
* _LZ_ReadVarSize() - Read unsigned integer with variable number of
* bytes depending on value.
*************************************************************************/
static int _LZ_ReadVarSize( unsigned int * x, unsigned char * buf )
{
unsigned int y, b, num_bytes;
/* Read complete value (stop when byte contains zero in 8:th bit) */
y = 0;
num_bytes = 0;
do
{
b = (unsigned int) (*buf ++);
y = (y << 7) | (b & 0x0000007f);
++ num_bytes;
}
while( b & 0x00000080 );
/* Store value in x */
*x = y;
/* Return number of bytes read */
return num_bytes;
}
/*************************************************************************
* PUBLIC FUNCTIONS *
*************************************************************************/
/*************************************************************************
* LZ_Compress() - Compress a block of data using an LZ77 coder.
* in - Input (uncompressed) buffer.
* out - Output (compressed) buffer. This buffer must be 0.4% larger
* than the input buffer, plus one byte.
* insize - Number of input bytes.
* The function returns the size of the compressed data.
*************************************************************************/
int LZ_Compress( unsigned char *in, unsigned char *out,
unsigned int insize )
{
unsigned char marker, symbol;
unsigned int inpos, outpos, bytesleft, i;
unsigned int maxoffset, offset, bestoffset;
unsigned int maxlength, length, bestlength;
unsigned int histogram[ 256 ];
unsigned char *ptr1, *ptr2;
/* Do we have anything to compress? */
if( insize < 1 )
{
return 0;
}
/* Create histogram */
for( i = 0; i < 256; ++ i )
{
histogram[ i ] = 0;
}
for( i = 0; i < insize; ++ i )
{
++ histogram[ in[ i ] ];
}
/* Find the least common byte, and use it as the marker symbol */
marker = 0;
for( i = 1; i < 256; ++ i )
{
if( histogram[ i ] < histogram[ marker ] )
{
marker = i;
}
}
/* Remember the marker symbol for the decoder */
out[ 0 ] = marker;
/* Start of compression */
inpos = 0;
outpos = 1;
/* Main compression loop */
bytesleft = insize;
do
{
/* Determine most distant position */
if( inpos > LZ_MAX_OFFSET ) maxoffset = LZ_MAX_OFFSET;
else maxoffset = inpos;
/* Get pointer to current position */
ptr1 = &in[ inpos ];
/* Search history window for maximum length string match */
bestlength = 3;
bestoffset = 0;
for( offset = 3; offset <= maxoffset; ++ offset )
{
/* Get pointer to candidate string */
ptr2 = &ptr1[ -(int)offset ];
/* Quickly determine if this is a candidate (for speed) */
if( (ptr1[ 0 ] == ptr2[ 0 ]) &&
(ptr1[ bestlength ] == ptr2[ bestlength ]) )
{
/* Determine maximum length for this offset */
maxlength = (bytesleft < offset ? bytesleft : offset);
/* Count maximum length match at this offset */
length = _LZ_StringCompare( ptr1, ptr2, 0, maxlength );
/* Better match than any previous match? */
if( length > bestlength )
{
bestlength = length;
bestoffset = offset;
}
}
}
/* Was there a good enough match? */
if( (bestlength >= 8) ||
((bestlength == 4) && (bestoffset <= 0x0000007f)) ||
((bestlength == 5) && (bestoffset <= 0x00003fff)) ||
((bestlength == 6) && (bestoffset <= 0x001fffff)) ||
((bestlength == 7) && (bestoffset <= 0x0fffffff)) )
{
out[ outpos ++ ] = (unsigned char) marker;
outpos += _LZ_WriteVarSize( bestlength, &out[ outpos ] );
outpos += _LZ_WriteVarSize( bestoffset, &out[ outpos ] );
inpos += bestlength;
bytesleft -= bestlength;
}
else
{
/* Output single byte (or two bytes if marker byte) */
symbol = in[ inpos ++ ];
out[ outpos ++ ] = symbol;
if( symbol == marker )
{
out[ outpos ++ ] = 0;
}
-- bytesleft;
}
}
while( bytesleft > 3 );
/* Dump remaining bytes, if any */
while( inpos < insize )
{
if( in[ inpos ] == marker )
{
out[ outpos ++ ] = marker;
out[ outpos ++ ] = 0;
}
else
{
out[ outpos ++ ] = in[ inpos ];
}
++ inpos;
}
return outpos;
}
/*************************************************************************
* LZ_CompressFast() - Compress a block of data using an LZ77 coder.
* in - Input (uncompressed) buffer.
* out - Output (compressed) buffer. This buffer must be 0.4% larger
* than the input buffer, plus one byte.
* insize - Number of input bytes.
* work - Pointer to a temporary buffer (internal working buffer), which
* must be able to hold (insize+65536) unsigned integers.
* The function returns the size of the compressed data.
*************************************************************************/
int LZ_CompressFast( unsigned char *in, unsigned char *out,
unsigned int insize, unsigned int *work )
{
unsigned char marker, symbol;
unsigned int inpos, outpos, bytesleft, i, index, symbols;
unsigned int offset, bestoffset;
unsigned int maxlength, length, bestlength;
unsigned int histogram[ 256 ], *lastindex, *jumptable;
unsigned char *ptr1, *ptr2;
/* Do we have anything to compress? */
if( insize < 1 )
{
return 0;
}
/* Assign arrays to the working area */
lastindex = work;
jumptable = &work[ 65536 ];
/* Build a "jump table". Here is how the jump table works:
jumptable[i] points to the nearest previous occurrence of the same
symbol pair as in[i]:in[i+1], so in[i] == in[jumptable[i]] and
in[i+1] == in[jumptable[i]+1], and so on... Following the jump table
gives a dramatic boost for the string search'n'match loop compared
to doing a brute force search. The jump table is built in O(n) time,
so it is a cheap operation in terms of time, but it is expensice in
terms of memory consumption. */
for( i = 0; i < 65536; ++ i )
{
lastindex[ i ] = 0xffffffff;
}
for( i = 0; i < insize-1; ++ i )
{
symbols = (((unsigned int)in[i]) << 8) | ((unsigned int)in[i+1]);
index = lastindex[ symbols ];
lastindex[ symbols ] = i;
jumptable[ i ] = index;
}
jumptable[ insize-1 ] = 0xffffffff;
/* Create histogram */
for( i = 0; i < 256; ++ i )
{
histogram[ i ] = 0;
}
for( i = 0; i < insize; ++ i )
{
++ histogram[ in[ i ] ];
}
/* Find the least common byte, and use it as the marker symbol */
marker = 0;
for( i = 1; i < 256; ++ i )
{
if( histogram[ i ] < histogram[ marker ] )
{
marker = i;
}
}
/* Remember the marker symbol for the decoder */
out[ 0 ] = marker;
/* Start of compression */
inpos = 0;
outpos = 1;
/* Main compression loop */
bytesleft = insize;
do
{
/* Get pointer to current position */
ptr1 = &in[ inpos ];
/* Search history window for maximum length string match */
bestlength = 3;
bestoffset = 0;
index = jumptable[ inpos ];
while( (index != 0xffffffff) && ((inpos - index) < LZ_MAX_OFFSET) )
{
/* Get pointer to candidate string */
ptr2 = &in[ index ];
/* Quickly determine if this is a candidate (for speed) */
if( ptr2[ bestlength ] == ptr1[ bestlength ] )
{
/* Determine maximum length for this offset */
offset = inpos - index;
maxlength = (bytesleft < offset ? bytesleft : offset);
/* Count maximum length match at this offset */
length = _LZ_StringCompare( ptr1, ptr2, 2, maxlength );
/* Better match than any previous match? */
if( length > bestlength )
{
bestlength = length;
bestoffset = offset;
}
}
/* Get next possible index from jump table */
index = jumptable[ index ];
}
/* Was there a good enough match? */
if( (bestlength >= 8) ||
((bestlength == 4) && (bestoffset <= 0x0000007f)) ||
((bestlength == 5) && (bestoffset <= 0x00003fff)) ||
((bestlength == 6) && (bestoffset <= 0x001fffff)) ||
((bestlength == 7) && (bestoffset <= 0x0fffffff)) )
{
out[ outpos ++ ] = (unsigned char) marker;
outpos += _LZ_WriteVarSize( bestlength, &out[ outpos ] );
outpos += _LZ_WriteVarSize( bestoffset, &out[ outpos ] );
inpos += bestlength;
bytesleft -= bestlength;
}
else
{
/* Output single byte (or two bytes if marker byte) */
symbol = in[ inpos ++ ];
out[ outpos ++ ] = symbol;
if( symbol == marker )
{
out[ outpos ++ ] = 0;
}
-- bytesleft;
}
}
while( bytesleft > 3 );
/* Dump remaining bytes, if any */
while( inpos < insize )
{
if( in[ inpos ] == marker )
{
out[ outpos ++ ] = marker;
out[ outpos ++ ] = 0;
}
else
{
out[ outpos ++ ] = in[ inpos ];
}
++ inpos;
}
return outpos;
}
/*************************************************************************
* LZ_Uncompress() - Uncompress a block of data using an LZ77 decoder.
* in - Input (compressed) buffer.
* out - Output (uncompressed) buffer. This buffer must be large
* enough to hold the uncompressed data.
* insize - Number of input bytes.
*************************************************************************/
int LZ_Uncompress( unsigned char *in, unsigned char *out,
unsigned int insize )
{
unsigned char marker, symbol;
unsigned int i, inpos, outpos, length, offset;
/* Do we have anything to uncompress? */
if( insize < 1 )
{
return 0;
}
/* Get marker symbol from input stream */
marker = in[ 0 ];
inpos = 1;
/* Main decompression loop */
outpos = 0;
do
{
symbol = in[ inpos ++ ];
if( symbol == marker )
{
/* We had a marker byte */
if( in[ inpos ] == 0 )
{
/* It was a single occurrence of the marker byte */
out[ outpos ++ ] = marker;
++ inpos;
}
else
{
/* Extract true length and offset */
inpos += _LZ_ReadVarSize( &length, &in[ inpos ] );
inpos += _LZ_ReadVarSize( &offset, &in[ inpos ] );
/* Copy corresponding data from history window */
for( i = 0; i < length; ++ i )
{
out[ outpos ] = out[ outpos - offset ];
++ outpos;
}
}
}
else
{
/* No marker, plain copy */
out[ outpos ++ ] = symbol;
}
}
while( inpos < insize );
return outpos;
}

61
tools/lz/lz.h Normal file
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@ -0,0 +1,61 @@
//
// Name: lz.h
// Author: Marcus Geelnard
// Description: LZ77 coder/decoder interface.
// Reentrant: Yes
// ------------------------------------------------------------------------
// $ATH_LICENSE_NULL$
// Copyright (c) 2003-2006 Marcus Geelnard
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
// Marcus Geelnard
// marcus.geelnard at home.se
//
//
// This file has been altered from the original version.
//
#ifndef _lz_h_
#define _lz_h_
#ifdef __cplusplus
extern "C" {
#endif
/*************************************************************************
* Function prototypes
*************************************************************************/
int LZ_Compress( unsigned char *in, unsigned char *out,
unsigned int insize );
int LZ_CompressFast( unsigned char *in, unsigned char *out,
unsigned int insize, unsigned int *work );
int LZ_Uncompress( unsigned char *in, unsigned char *out,
unsigned int insize );
#ifdef __cplusplus
}
#endif
#endif /* _lz_h_ */

93
tools/lz/lz77.c Normal file
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@ -0,0 +1,93 @@
/*
* Copyright (c) 2019 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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 program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <sys/stat.h>
#include "lz.h"
char filename[1024];
int main(int argc, char *argv[])
{
int nbytes;
int filename_len;
struct stat statbuf;
FILE *in_file, *out_file;
if(stat(argv[1], &statbuf))
goto error;
if((in_file=fopen(argv[1], "r")) == NULL)
goto error;
strcpy(filename, argv[1]);
filename_len = strlen(filename);
uint32_t in_size = statbuf.st_size;
uint8_t *in_buf = (uint8_t *)malloc(in_size);
uint32_t out_size = statbuf.st_size + 257;
uint8_t *out_buf = (uint8_t *)malloc(out_size);
if(!(in_buf && out_buf))
goto error;
if(fread(in_buf, 1, in_size, in_file) != in_size)
goto error;
fclose(in_file);
uint32_t *work = (uint32_t*)malloc(sizeof(uint32_t) * (in_size + 65536));
for (int i = 0; i < 2; i++)
{
uint32_t in_size_tmp;
if (!i)
{
in_size_tmp = in_size / 2;
strcpy(filename + filename_len, ".00.lz");
}
else
{
in_size_tmp = in_size - (in_size / 2);
strcpy(filename + filename_len, ".01.lz");
}
if (work)
nbytes = LZ_CompressFast(in_buf + (in_size / 2) * i, out_buf, in_size_tmp, work);
else
goto error;
if (nbytes > out_size)
goto error;
if((out_file = fopen(filename,"w")) == NULL)
goto error;
if (fwrite(out_buf, 1, nbytes, out_file) != nbytes)
goto error;
fclose(out_file);
}
return 0;
error:
fprintf(stderr, "Failed to compress: %s\n", argv[1]);
exit(1);
}