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SDRAM loader

core0-buffer
Sebastien Bourdeauducq 2020-04-28 19:07:49 +08:00
parent 21ae674510
commit b123e15b3c
14 changed files with 945 additions and 22 deletions
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47
Cargo.lock generated
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@ -42,6 +42,22 @@ version = "0.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0f8cb7306107e4b10e64994de6d3274bd08996a7c1322a27b86482392f96be0a"
[[package]]
name = "cstr_core"
version = "0.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8758514b5f03968703f1db1f1e196e031d5268f5295ff99a5bf345008790ba85"
dependencies = [
"cty",
"memchr",
]
[[package]]
name = "cty"
version = "0.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7313c0d620d0cb4dbd9d019e461a4beb501071ff46ec0ab933efb4daa76d73e3"
[[package]]
name = "dyld"
version = "0.1.0"
@ -134,7 +150,7 @@ dependencies = [
[[package]]
name = "libasync"
version = "0.0.0"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#aa9379463207a02ee7ca4e597054a447b9a90232"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#614b1ef350edd8576fc71292fc89cf79a1810aba"
dependencies = [
"embedded-hal",
"libcortex_a9",
@ -146,7 +162,7 @@ dependencies = [
[[package]]
name = "libboard_zynq"
version = "0.0.0"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#aa9379463207a02ee7ca4e597054a447b9a90232"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#614b1ef350edd8576fc71292fc89cf79a1810aba"
dependencies = [
"bit_field",
"embedded-hal",
@ -161,7 +177,7 @@ dependencies = [
[[package]]
name = "libcortex_a9"
version = "0.0.0"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#aa9379463207a02ee7ca4e597054a447b9a90232"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#614b1ef350edd8576fc71292fc89cf79a1810aba"
dependencies = [
"bit_field",
"libregister",
@ -170,7 +186,7 @@ dependencies = [
[[package]]
name = "libregister"
version = "0.0.0"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#aa9379463207a02ee7ca4e597054a447b9a90232"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#614b1ef350edd8576fc71292fc89cf79a1810aba"
dependencies = [
"bit_field",
"vcell",
@ -180,7 +196,7 @@ dependencies = [
[[package]]
name = "libsupport_zynq"
version = "0.0.0"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#aa9379463207a02ee7ca4e597054a447b9a90232"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#614b1ef350edd8576fc71292fc89cf79a1810aba"
dependencies = [
"compiler_builtins",
"libboard_zynq",
@ -193,9 +209,9 @@ dependencies = [
[[package]]
name = "linked_list_allocator"
version = "0.8.2"
version = "0.8.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c1070ea54beccbfd3a3987aca6440f94cc1e0b447c2d979d8c7f761e265417e4"
checksum = "d6b60501dd4c850950bb43f970d544f6ce04e0ca021da2db2538fbe9d923f19e"
[[package]]
name = "log"
@ -212,6 +228,12 @@ version = "0.7.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fdcec5e97041c7f0f1c5b7d93f12e57293c831c646f4cc7a5db59460c7ea8de6"
[[package]]
name = "memchr"
version = "2.3.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3728d817d99e5ac407411fa471ff9800a778d88a24685968b36824eaf4bee400"
[[package]]
name = "nb"
version = "0.1.2"
@ -319,6 +341,17 @@ dependencies = [
"unicode-xid",
]
[[package]]
name = "szl"
version = "0.1.0"
dependencies = [
"cstr_core",
"libboard_zynq",
"libcortex_a9",
"libsupport_zynq",
"log",
]
[[package]]
name = "unicode-xid"
version = "0.2.0"

3
Cargo.toml
View File

@ -1,7 +1,8 @@
[workspace]
members = [
"libdyld",
"runtime"
"runtime",
"szl"
]
[profile.dev]

6
README.md Normal file
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@ -0,0 +1,6 @@
Build with:
```shell
cargo xbuild -p runtime --release
cargo xbuild -p szl --release
```

4
remote_run.sh
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@ -8,6 +8,6 @@ TARGET_FOLDER=/tmp/zynq-\$USER
ssh $TARGET_HOST "mkdir -p $TARGET_FOLDER"
rsync openocd/* $TARGET_HOST:$TARGET_FOLDER
rsync target/armv7-none-eabihf/release/runtime $TARGET_HOST:$TARGET_FOLDER
rsync target/armv7-none-eabihf/release/szl $TARGET_HOST:$TARGET_FOLDER
rsync build/top.bit $TARGET_HOST:$TARGET_FOLDER
ssh $TARGET_HOST "cd $TARGET_FOLDER; openocd -f zc706.cfg -c 'pld load 0 top.bit; load_image runtime; resume 0; exit'"
ssh $TARGET_HOST "cd $TARGET_FOLDER; openocd -f zc706.cfg -c 'pld load 0 top.bit; load_image szl; resume 0; exit'"

BIN
runtime.bin Executable file
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Binary file not shown.

18
runtime/build.rs Normal file
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@ -0,0 +1,18 @@
use std::env;
use std::fs::File;
use std::io::Write;
use std::path::PathBuf;
fn main() {
// Put the linker script somewhere the linker can find it
let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
File::create(out.join("link.x"))
.unwrap()
.write_all(include_bytes!("link.x"))
.unwrap();
println!("cargo:rustc-link-search={}", out.display());
// Only re-run the build script when link.x is changed,
// instead of when any part of the source code changes.
println!("cargo:rerun-if-changed=link.x");
}

71
runtime/link.x Normal file
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@ -0,0 +1,71 @@
ENTRY(_boot_cores);
STACK_SIZE = 0x8000;
HEAP_SIZE = 0x1000000;
/* Provide some defaults */
PROVIDE(Reset = _boot_cores);
PROVIDE(UndefinedInstruction = Reset);
PROVIDE(SoftwareInterrupt = Reset);
PROVIDE(PrefetchAbort = Reset);
PROVIDE(DataAbort = Reset);
PROVIDE(ReservedException = Reset);
PROVIDE(IRQ = Reset);
PROVIDE(FIQ = Reset);
MEMORY
{
SDRAM : ORIGIN = 0x00100000, LENGTH = 0x1FF00000
}
SECTIONS
{
.text :
{
KEEP(*(.text.exceptions));
*(.text.boot);
*(.text .text.*);
} > SDRAM
.rodata : ALIGN(4)
{
*(.rodata .rodata.*);
} > SDRAM
.data : ALIGN(4)
{
*(.data .data.*);
} > SDRAM
.bss (NOLOAD) : ALIGN(0x4000)
{
/* Aligned to 16 kB */
KEEP(*(.bss.l1_table));
*(.bss .bss.*);
. = ALIGN(4);
} > SDRAM
__bss_start = ADDR(.bss);
__bss_end = ADDR(.bss) + SIZEOF(.bss);
.heap (NOLOAD) : ALIGN(0x1000)
{
. += HEAP_SIZE;
} > SDRAM
__heap_start = ADDR(.heap);
__heap_end = ADDR(.heap) + SIZEOF(.heap);
.stack (NOLOAD) : ALIGN(0x1000)
{
. += STACK_SIZE;
} > SDRAM
__stack_end = ADDR(.stack);
__stack_start = ADDR(.stack) + SIZEOF(.stack);
/DISCARD/ :
{
/* Unused exception related info that only wastes space */
*(.ARM.exidx);
*(.ARM.exidx.*);
*(.ARM.extab.*);
}
}

14
runtime/src/main.rs
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@ -8,10 +8,7 @@ extern crate log;
use core::{cmp, str};
use log::info;
use libboard_zynq::{
self as zynq, clocks::Clocks, clocks::source::{ClockSource, ArmPll, IoPll},
timer::GlobalTimer,
};
use libboard_zynq::timer::GlobalTimer;
use libsupport_zynq::{logger, ram};
mod proto;
@ -42,14 +39,7 @@ pub fn main_core0() {
log::set_max_level(log::LevelFilter::Debug);
info!("NAR3 starting...");
const CPU_FREQ: u32 = 800_000_000;
ArmPll::setup(2 * CPU_FREQ);
Clocks::set_cpu_freq(CPU_FREQ);
IoPll::setup(1_000_000_000);
libboard_zynq::stdio::drop_uart(); // reinitialize UART after clocking change
let mut ddr = zynq::ddr::DdrRam::new();
ram::init_alloc(&mut ddr);
ram::init_alloc_linker();
info!("Detected gateware: {}", identifier_read(&mut [0; 64]));

1
shell.nix
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@ -34,6 +34,7 @@ in
rustPlatform.rust.rustc
rustPlatform.rust.cargo
rustcSrc
pkgs.clang_9
pkgs.cacert
pkgs.cargo-xbuild

17
szl/Cargo.toml Normal file
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@ -0,0 +1,17 @@
[package]
name = "szl"
description = "Simple Zynq Loader"
version = "0.1.0"
authors = ["M-Labs"]
edition = "2018"
[features]
target_zc706 = ["libboard_zynq/target_zc706", "libsupport_zynq/target_zc706"]
default = ["target_zc706"]
[dependencies]
log = "0.4"
cstr_core = { version = "0.2", default-features = false }
libboard_zynq = { git = "https://git.m-labs.hk/M-Labs/zc706.git" }
libsupport_zynq = { git = "https://git.m-labs.hk/M-Labs/zc706.git" }
libcortex_a9 = { git = "https://git.m-labs.hk/M-Labs/zc706.git" }

48
szl/build.rs Normal file
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@ -0,0 +1,48 @@
use std::process::Command;
use std::env;
use std::fs::File;
use std::io::Write;
use std::path::{Path, PathBuf};
fn main() {
// FIXME: this is dirty and unreliable. How to depend on the output of the runtime build?
let payload = "../target/armv7-none-eabihf/release/runtime";
let out = env::var("OUT_DIR").unwrap();
let out_dir = &PathBuf::from(&out);
let status = Command::new("llvm-objcopy")
.args(&["-O", "binary", payload, &format!("{}/payload.bin", out)])
.status().unwrap();
assert!(status.success());
let status = Command::new("lzma")
.args(&["--keep", "-f", &format!("{}/payload.bin", out)])
.status().unwrap();
assert!(status.success());
println!("cargo:rerun-if-changed={}", payload);
let status = Command::new("clang")
.args(&["-target", "armv7-unknown-linux", "-fno-stack-protector",
"src/unlzma.c", "-O2", "-c", "-fPIC", "-o",
&format!("{}/unlzma.o", out)])
.status().unwrap();
assert!(status.success());
let status = Command::new("llvm-ar")
.args(&["crus", "libunlzma.a", "unlzma.o"])
.current_dir(&Path::new(&out))
.status().unwrap();
assert!(status.success());
println!("cargo:rustc-link-search=native={}", out);
println!("cargo:rustc-link-lib=static=unlzma");
println!("cargo:rerun-if-changed=src/unlzma.c");
// Put the linker script somewhere the linker can find it
File::create(out_dir.join("link.x"))
.unwrap()
.write_all(include_bytes!("link.x"))
.unwrap();
println!("cargo:rustc-link-search={}", out_dir.display());
// Only re-run the build script when link.x is changed,
// instead of when any part of the source code changes.
println!("cargo:rerun-if-changed=link.x");
}

0
link.x → szl/link.x
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68
szl/src/main.rs Normal file
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@ -0,0 +1,68 @@
#![no_std]
#![no_main]
extern crate log;
use core::mem;
use log::{info, error};
use cstr_core::CStr;
use libboard_zynq::{
self as zynq, clocks::Clocks, clocks::source::{ClockSource, ArmPll, IoPll},
timer::GlobalTimer,
};
use libsupport_zynq::{boot, logger};
static mut STACK_CORE1: [u32; 512] = [0; 512];
extern "C" {
fn unlzma_simple(buf: *const u8, in_len: i32,
output: *mut u8,
error: extern fn(*const u8)) -> i32;
}
extern fn lzma_error(message: *const u8) {
error!("LZMA error: {}", unsafe { CStr::from_ptr(message) }.to_str().unwrap());
}
#[no_mangle]
pub fn main_core0() {
GlobalTimer::start();
let _ = logger::init();
log::set_max_level(log::LevelFilter::Debug);
info!("Simple Zynq Loader starting");
const CPU_FREQ: u32 = 800_000_000;
ArmPll::setup(2 * CPU_FREQ);
Clocks::set_cpu_freq(CPU_FREQ);
IoPll::setup(1_000_000_000);
libboard_zynq::stdio::drop_uart(); // reinitialize UART after clocking change
let mut ddr = zynq::ddr::DdrRam::new();
let payload = include_bytes!(concat!(env!("OUT_DIR"), "/payload.bin.lzma"));
info!("decompressing payload");
let result = unsafe {
unlzma_simple(payload.as_ptr(), payload.len() as i32, ddr.ptr(), lzma_error)
};
if result < 0 {
error!("decompression failed");
} else {
let core1_stack = unsafe { &mut STACK_CORE1[..] };
boot::Core1::start(core1_stack);
info!("executing payload");
unsafe {
(mem::transmute::<*mut u8, fn()>(ddr.ptr::<u8>()))();
}
}
loop {}
}
#[no_mangle]
pub fn main_core1() {
unsafe {
(mem::transmute::<u32, fn()>(0x00100000))();
}
}

670
szl/src/unlzma.c Normal file
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@ -0,0 +1,670 @@
/*
*Taken from: Lzma decompressor for Linux kernel. Shamelessly snarfed
*from busybox 1.1.1
*
*Linux kernel adaptation
*Copyright (C) 2006 Alain < alain@knaff.lu >
*
*Based on small lzma deflate implementation/Small range coder
*implementation for lzma.
*Copyright (C) 2006 Aurelien Jacobs < aurel@gnuage.org >
*
*Based on LzmaDecode.c from the LZMA SDK 4.22 (http://www.7-zip.org/)
*Copyright (C) 1999-2005 Igor Pavlov
*
*Copyrights of the parts, see headers below.
*
*
*This program is free software; you can redistribute it and/or
*modify it under the terms of the GNU Lesser General Public
*License as published by the Free Software Foundation; either
*version 2.1 of the License, or (at your option) any later version.
*
*This program is distributed in the hope that it will be useful,
*but WITHOUT ANY WARRANTY; without even the implied warranty of
*MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
*Lesser General Public License for more details.
*
*You should have received a copy of the GNU Lesser General Public
*License along with this library; if not, write to the Free Software
*Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define NULL ((void *)0)
#define alloca(size) __builtin_alloca(size)
#define malloc alloca
static inline void free(void *p) {}
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
static long long read_int(unsigned char *ptr, int size)
{
int i;
long long ret = 0;
for (i = 0; i < size; i++)
ret = (ret << 8) | ptr[size-i-1];
return ret;
}
#define ENDIAN_CONVERT(x) \
x = (typeof(x))read_int((unsigned char *)&x, sizeof(x))
/* Small range coder implementation for lzma.
*Copyright (C) 2006 Aurelien Jacobs < aurel@gnuage.org >
*
*Based on LzmaDecode.c from the LZMA SDK 4.22 (http://www.7-zip.org/)
*Copyright (c) 1999-2005 Igor Pavlov
*/
#define LZMA_IOBUF_SIZE 0x10000
struct rc {
int (*fill)(void*, unsigned int);
unsigned char *ptr;
unsigned char *buffer;
unsigned char *buffer_end;
int buffer_size;
unsigned int code;
unsigned int range;
unsigned int bound;
void (*error)(char *);
};
#define RC_TOP_BITS 24
#define RC_MOVE_BITS 5
#define RC_MODEL_TOTAL_BITS 11
static int nofill(void *buffer, unsigned int len)
{
return -1;
}
/* Called twice: once at startup and once in rc_normalize() */
static void rc_read(struct rc *rc)
{
rc->buffer_size = rc->fill((char *)rc->buffer, LZMA_IOBUF_SIZE);
if (rc->buffer_size <= 0)
rc->error("unexpected EOF");
rc->ptr = rc->buffer;
rc->buffer_end = rc->buffer + rc->buffer_size;
}
/* Called once */
static inline void rc_init(struct rc *rc,
int (*fill)(void*, unsigned int),
unsigned char *buffer, int buffer_size)
{
if (fill)
rc->fill = fill;
else
rc->fill = nofill;
rc->buffer = buffer;
rc->buffer_size = buffer_size;
rc->buffer_end = rc->buffer + rc->buffer_size;
rc->ptr = rc->buffer;
rc->code = 0;
rc->range = 0xFFFFFFFF;
}
static inline void rc_init_code(struct rc *rc)
{
int i;
for (i = 0; i < 5; i++) {
if (rc->ptr >= rc->buffer_end)
rc_read(rc);
rc->code = (rc->code << 8) | *rc->ptr++;
}
}
/* Called twice, but one callsite is in inline'd rc_is_bit_0_helper() */
static void rc_do_normalize(struct rc *rc)
{
if (rc->ptr >= rc->buffer_end)
rc_read(rc);
rc->range <<= 8;
rc->code = (rc->code << 8) | *rc->ptr++;
}
static inline void rc_normalize(struct rc *rc)
{
if (rc->range < (1 << RC_TOP_BITS))
rc_do_normalize(rc);
}
/* Called 9 times */
/* Why rc_is_bit_0_helper exists?
*Because we want to always expose (rc->code < rc->bound) to optimizer
*/
static inline unsigned int rc_is_bit_0_helper(struct rc *rc, unsigned short int *p)
{
rc_normalize(rc);
rc->bound = *p * (rc->range >> RC_MODEL_TOTAL_BITS);
return rc->bound;
}
static inline int rc_is_bit_0(struct rc *rc, unsigned short int *p)
{
unsigned int t = rc_is_bit_0_helper(rc, p);
return rc->code < t;
}
/* Called ~10 times, but very small, thus inlined */
static inline void rc_update_bit_0(struct rc *rc, unsigned short int *p)
{
rc->range = rc->bound;
*p += ((1 << RC_MODEL_TOTAL_BITS) - *p) >> RC_MOVE_BITS;
}
static inline void rc_update_bit_1(struct rc *rc, unsigned short int *p)
{
rc->range -= rc->bound;
rc->code -= rc->bound;
*p -= *p >> RC_MOVE_BITS;
}
/* Called 4 times in unlzma loop */
static int rc_get_bit(struct rc *rc, unsigned short int *p, int *symbol)
{
if (rc_is_bit_0(rc, p)) {
rc_update_bit_0(rc, p);
*symbol *= 2;
return 0;
} else {
rc_update_bit_1(rc, p);
*symbol = *symbol * 2 + 1;
return 1;
}
}
/* Called once */
static inline int rc_direct_bit(struct rc *rc)
{
rc_normalize(rc);
rc->range >>= 1;
if (rc->code >= rc->range) {
rc->code -= rc->range;
return 1;
}
return 0;
}
/* Called twice */
static inline void
rc_bit_tree_decode(struct rc *rc, unsigned short int *p, int num_levels, int *symbol)
{
int i = num_levels;
*symbol = 1;
while (i--)
rc_get_bit(rc, p + *symbol, symbol);
*symbol -= 1 << num_levels;
}
/*
* Small lzma deflate implementation.
* Copyright (C) 2006 Aurelien Jacobs < aurel@gnuage.org >
*
* Based on LzmaDecode.c from the LZMA SDK 4.22 (http://www.7-zip.org/)
* Copyright (C) 1999-2005 Igor Pavlov
*/
struct lzma_header {
unsigned char pos;
unsigned int dict_size;
unsigned long long int dst_size;
} __attribute__ ((packed)) ;
#define LZMA_BASE_SIZE 1846
#define LZMA_LIT_SIZE 768
#define LZMA_NUM_POS_BITS_MAX 4
#define LZMA_LEN_NUM_LOW_BITS 3
#define LZMA_LEN_NUM_MID_BITS 3
#define LZMA_LEN_NUM_HIGH_BITS 8
#define LZMA_LEN_CHOICE 0
#define LZMA_LEN_CHOICE_2 (LZMA_LEN_CHOICE + 1)
#define LZMA_LEN_LOW (LZMA_LEN_CHOICE_2 + 1)
#define LZMA_LEN_MID (LZMA_LEN_LOW \
+ (1 << (LZMA_NUM_POS_BITS_MAX + LZMA_LEN_NUM_LOW_BITS)))
#define LZMA_LEN_HIGH (LZMA_LEN_MID \
+(1 << (LZMA_NUM_POS_BITS_MAX + LZMA_LEN_NUM_MID_BITS)))
#define LZMA_NUM_LEN_PROBS (LZMA_LEN_HIGH + (1 << LZMA_LEN_NUM_HIGH_BITS))
#define LZMA_NUM_STATES 12
#define LZMA_NUM_LIT_STATES 7
#define LZMA_START_POS_MODEL_INDEX 4
#define LZMA_END_POS_MODEL_INDEX 14
#define LZMA_NUM_FULL_DISTANCES (1 << (LZMA_END_POS_MODEL_INDEX >> 1))
#define LZMA_NUM_POS_SLOT_BITS 6
#define LZMA_NUM_LEN_TO_POS_STATES 4
#define LZMA_NUM_ALIGN_BITS 4
#define LZMA_MATCH_MIN_LEN 2
#define LZMA_IS_MATCH 0
#define LZMA_IS_REP (LZMA_IS_MATCH + (LZMA_NUM_STATES << LZMA_NUM_POS_BITS_MAX))
#define LZMA_IS_REP_G0 (LZMA_IS_REP + LZMA_NUM_STATES)
#define LZMA_IS_REP_G1 (LZMA_IS_REP_G0 + LZMA_NUM_STATES)
#define LZMA_IS_REP_G2 (LZMA_IS_REP_G1 + LZMA_NUM_STATES)
#define LZMA_IS_REP_0_LONG (LZMA_IS_REP_G2 + LZMA_NUM_STATES)
#define LZMA_POS_SLOT (LZMA_IS_REP_0_LONG \
+ (LZMA_NUM_STATES << LZMA_NUM_POS_BITS_MAX))
#define LZMA_SPEC_POS (LZMA_POS_SLOT \
+(LZMA_NUM_LEN_TO_POS_STATES << LZMA_NUM_POS_SLOT_BITS))
#define LZMA_ALIGN (LZMA_SPEC_POS \
+ LZMA_NUM_FULL_DISTANCES - LZMA_END_POS_MODEL_INDEX)
#define LZMA_LEN_CODER (LZMA_ALIGN + (1 << LZMA_NUM_ALIGN_BITS))
#define LZMA_REP_LEN_CODER (LZMA_LEN_CODER + LZMA_NUM_LEN_PROBS)
#define LZMA_LITERAL (LZMA_REP_LEN_CODER + LZMA_NUM_LEN_PROBS)
struct writer {
unsigned char *buffer;
unsigned char previous_byte;
int buffer_pos;
int bufsize;
int global_pos;
int(*flush)(void*, unsigned int);
struct lzma_header *header;
};
struct cstate {
int state;
unsigned int rep0, rep1, rep2, rep3;
};
static inline int get_pos(struct writer *wr)
{
return
wr->global_pos + wr->buffer_pos;
}
static inline unsigned char peek_old_byte(struct writer *wr,
unsigned int offs)
{
if (!wr->flush) {
int pos;
while (offs > wr->header->dict_size)
offs -= wr->header->dict_size;
pos = wr->buffer_pos - offs;
return wr->buffer[pos];
} else {
unsigned int pos = wr->buffer_pos - offs;
while (pos >= wr->header->dict_size)
pos += wr->header->dict_size;
return wr->buffer[pos];
}
}
static inline int write_byte(struct writer *wr, unsigned char byte)
{
wr->buffer[wr->buffer_pos++] = wr->previous_byte = byte;
if (wr->flush && wr->buffer_pos == wr->header->dict_size) {
wr->buffer_pos = 0;
wr->global_pos += wr->header->dict_size;
if (wr->flush((char *)wr->buffer, wr->header->dict_size)
!= wr->header->dict_size)
return -1;
}
return 0;
}
static inline int copy_byte(struct writer *wr, unsigned int offs)
{
return write_byte(wr, peek_old_byte(wr, offs));
}
static inline int copy_bytes(struct writer *wr,
unsigned int rep0, int len)
{
do {
if (copy_byte(wr, rep0))
return -1;
len--;
} while (len != 0 && wr->buffer_pos < wr->header->dst_size);
return len;
}
static inline int process_bit0(struct writer *wr, struct rc *rc,
struct cstate *cst, unsigned short int *p,
int pos_state, unsigned short int *prob,
int lc, unsigned int literal_pos_mask) {
int mi = 1;
rc_update_bit_0(rc, prob);
prob = (p + LZMA_LITERAL +
(LZMA_LIT_SIZE
* (((get_pos(wr) & literal_pos_mask) << lc)
+ (wr->previous_byte >> (8 - lc))))
);
if (cst->state >= LZMA_NUM_LIT_STATES) {
int match_byte = peek_old_byte(wr, cst->rep0);
do {
int bit;
unsigned short int *prob_lit;
match_byte <<= 1;
bit = match_byte & 0x100;
prob_lit = prob + 0x100 + bit + mi;
if (rc_get_bit(rc, prob_lit, &mi)) {
if (!bit)
break;
} else {
if (bit)
break;
}
} while (mi < 0x100);
}
while (mi < 0x100) {
unsigned short int *prob_lit = prob + mi;
rc_get_bit(rc, prob_lit, &mi);
}
if (cst->state < 4)
cst->state = 0;
else if (cst->state < 10)
cst->state -= 3;
else
cst->state -= 6;
return write_byte(wr, mi);
}
static inline int process_bit1(struct writer *wr, struct rc *rc,
struct cstate *cst, unsigned short int *p,
int pos_state, unsigned short int *prob) {
int offset;
unsigned short int *prob_len;
int num_bits;
int len;
rc_update_bit_1(rc, prob);
prob = p + LZMA_IS_REP + cst->state;
if (rc_is_bit_0(rc, prob)) {
rc_update_bit_0(rc, prob);
cst->rep3 = cst->rep2;
cst->rep2 = cst->rep1;
cst->rep1 = cst->rep0;
cst->state = cst->state < LZMA_NUM_LIT_STATES ? 0 : 3;
prob = p + LZMA_LEN_CODER;
} else {
rc_update_bit_1(rc, prob);
prob = p + LZMA_IS_REP_G0 + cst->state;
if (rc_is_bit_0(rc, prob)) {
rc_update_bit_0(rc, prob);
prob = (p + LZMA_IS_REP_0_LONG
+ (cst->state <<
LZMA_NUM_POS_BITS_MAX) +
pos_state);
if (rc_is_bit_0(rc, prob)) {
rc_update_bit_0(rc, prob);
cst->state = cst->state < LZMA_NUM_LIT_STATES ?
9 : 11;
return copy_byte(wr, cst->rep0);
} else {
rc_update_bit_1(rc, prob);
}
} else {
unsigned int distance;
rc_update_bit_1(rc, prob);
prob = p + LZMA_IS_REP_G1 + cst->state;
if (rc_is_bit_0(rc, prob)) {
rc_update_bit_0(rc, prob);
distance = cst->rep1;
} else {
rc_update_bit_1(rc, prob);
prob = p + LZMA_IS_REP_G2 + cst->state;
if (rc_is_bit_0(rc, prob)) {
rc_update_bit_0(rc, prob);
distance = cst->rep2;
} else {
rc_update_bit_1(rc, prob);
distance = cst->rep3;
cst->rep3 = cst->rep2;
}
cst->rep2 = cst->rep1;
}
cst->rep1 = cst->rep0;
cst->rep0 = distance;
}
cst->state = cst->state < LZMA_NUM_LIT_STATES ? 8 : 11;
prob = p + LZMA_REP_LEN_CODER;
}
prob_len = prob + LZMA_LEN_CHOICE;
if (rc_is_bit_0(rc, prob_len)) {
rc_update_bit_0(rc, prob_len);
prob_len = (prob + LZMA_LEN_LOW
+ (pos_state <<
LZMA_LEN_NUM_LOW_BITS));
offset = 0;
num_bits = LZMA_LEN_NUM_LOW_BITS;
} else {
rc_update_bit_1(rc, prob_len);
prob_len = prob + LZMA_LEN_CHOICE_2;
if (rc_is_bit_0(rc, prob_len)) {
rc_update_bit_0(rc, prob_len);
prob_len = (prob + LZMA_LEN_MID
+ (pos_state <<
LZMA_LEN_NUM_MID_BITS));
offset = 1 << LZMA_LEN_NUM_LOW_BITS;
num_bits = LZMA_LEN_NUM_MID_BITS;
} else {
rc_update_bit_1(rc, prob_len);
prob_len = prob + LZMA_LEN_HIGH;
offset = ((1 << LZMA_LEN_NUM_LOW_BITS)
+ (1 << LZMA_LEN_NUM_MID_BITS));
num_bits = LZMA_LEN_NUM_HIGH_BITS;
}
}
rc_bit_tree_decode(rc, prob_len, num_bits, &len);
len += offset;
if (cst->state < 4) {
int pos_slot;
cst->state += LZMA_NUM_LIT_STATES;
prob =
p + LZMA_POS_SLOT +
((len <
LZMA_NUM_LEN_TO_POS_STATES ? len :
LZMA_NUM_LEN_TO_POS_STATES - 1)
<< LZMA_NUM_POS_SLOT_BITS);
rc_bit_tree_decode(rc, prob,
LZMA_NUM_POS_SLOT_BITS,
&pos_slot);
if (pos_slot >= LZMA_START_POS_MODEL_INDEX) {
int i, mi;
num_bits = (pos_slot >> 1) - 1;
cst->rep0 = 2 | (pos_slot & 1);
if (pos_slot < LZMA_END_POS_MODEL_INDEX) {
cst->rep0 <<= num_bits;
prob = p + LZMA_SPEC_POS +
cst->rep0 - pos_slot - 1;
} else {
num_bits -= LZMA_NUM_ALIGN_BITS;
while (num_bits--)
cst->rep0 = (cst->rep0 << 1) |
rc_direct_bit(rc);
prob = p + LZMA_ALIGN;
cst->rep0 <<= LZMA_NUM_ALIGN_BITS;
num_bits = LZMA_NUM_ALIGN_BITS;
}
i = 1;
mi = 1;
while (num_bits--) {
if (rc_get_bit(rc, prob + mi, &mi))
cst->rep0 |= i;
i <<= 1;
}
} else
cst->rep0 = pos_slot;
if (++(cst->rep0) == 0)
return 0;
if (cst->rep0 > wr->header->dict_size
|| cst->rep0 > get_pos(wr))
return -1;
}
len += LZMA_MATCH_MIN_LEN;
return copy_bytes(wr, cst->rep0, len);
}
int unlzma(unsigned char *buf, int in_len,
int(*fill)(void*, unsigned int),
int(*flush)(void*, unsigned int),
unsigned char *output,
int *posp,
void(*error)(char *x)
)
{
struct lzma_header header;
int lc, pb, lp;
unsigned int pos_state_mask;
unsigned int literal_pos_mask;
unsigned short int *p;
int num_probs;
struct rc rc;
int i, mi;
struct writer wr;
struct cstate cst;
unsigned char *inbuf;
int ret = -1;
rc.error = error;
if (buf)
inbuf = buf;
else
inbuf = malloc(LZMA_IOBUF_SIZE);
if (!inbuf) {
error("Could not allocate input bufer");
goto exit_0;
}
cst.state = 0;
cst.rep0 = cst.rep1 = cst.rep2 = cst.rep3 = 1;
wr.header = &header;
wr.flush = flush;
wr.global_pos = 0;
wr.previous_byte = 0;
wr.buffer_pos = 0;
rc_init(&rc, fill, inbuf, in_len);
for (i = 0; i < sizeof(header); i++) {
if (rc.ptr >= rc.buffer_end)
rc_read(&rc);
((unsigned char *)&header)[i] = *rc.ptr++;
}
if (header.pos >= (9 * 5 * 5)) {
error("bad header");
goto exit_1;
}
mi = 0;
lc = header.pos;
while (lc >= 9) {
mi++;
lc -= 9;
}
pb = 0;
lp = mi;
while (lp >= 5) {
pb++;
lp -= 5;
}
pos_state_mask = (1 << pb) - 1;
literal_pos_mask = (1 << lp) - 1;
ENDIAN_CONVERT(header.dict_size);
ENDIAN_CONVERT(header.dst_size);
if (header.dict_size == 0)
header.dict_size = 1;
if (output)
wr.buffer = output;
else {
wr.bufsize = MIN(header.dst_size, header.dict_size);
wr.buffer = malloc(wr.bufsize);
}
if (wr.buffer == NULL)
goto exit_1;
num_probs = LZMA_BASE_SIZE + (LZMA_LIT_SIZE << (lc + lp));
p = (unsigned short int *) malloc(num_probs * sizeof(*p));
if (p == 0)
goto exit_2;
num_probs = LZMA_LITERAL + (LZMA_LIT_SIZE << (lc + lp));
for (i = 0; i < num_probs; i++)
p[i] = (1 << RC_MODEL_TOTAL_BITS) >> 1;
rc_init_code(&rc);
while (get_pos(&wr) < header.dst_size) {
int pos_state = get_pos(&wr) & pos_state_mask;
unsigned short int *prob = p + LZMA_IS_MATCH +
(cst.state << LZMA_NUM_POS_BITS_MAX) + pos_state;
if (rc_is_bit_0(&rc, prob)) {
if (process_bit0(&wr, &rc, &cst, p, pos_state, prob,
lc, literal_pos_mask)) {
error("LZMA data is corrupt");
goto exit_3;
}
} else {
if (process_bit1(&wr, &rc, &cst, p, pos_state, prob)) {
error("LZMA data is corrupt");
goto exit_3;
}
if (cst.rep0 == 0)
break;
}
if (rc.buffer_size <= 0)
goto exit_3;
}
if (posp)
*posp = rc.ptr-rc.buffer;
if (!wr.flush || wr.flush(wr.buffer, wr.buffer_pos) == wr.buffer_pos)
ret = 0;
exit_3:
free(p);
exit_2:
if (!output)
free(wr.buffer);
exit_1:
if (!buf)
free(inbuf);
exit_0:
return ret;
}
int unlzma_simple(unsigned char *buf, int in_len,
unsigned char *output,
void(*error)(char *x))
{
return unlzma(buf, in_len, NULL, NULL, output, NULL, error);
}