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authorChris Zankel <czankel@tensilica.com>2005-06-24 01:01:12 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-24 03:05:21 -0400
commit4bedea94545165364618d403d03b61d797acba0b (patch)
tree04626bb71e0fb5ea5c5d5aa4fedc813301bea6a6 /arch/xtensa
parent8e1a6dd2fddcc73c9e933758361e3d9c076c688a (diff)
[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 2
The attached patches provides part 2 of an architecture implementation for the Tensilica Xtensa CPU series. Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/xtensa')
-rw-r--r--arch/xtensa/boot/Makefile37
-rw-r--r--arch/xtensa/boot/boot-elf/Makefile52
-rw-r--r--arch/xtensa/boot/boot-elf/boot.ld71
-rw-r--r--arch/xtensa/boot/boot-elf/bootstrap.S37
-rw-r--r--arch/xtensa/boot/boot-redboot/Makefile35
-rw-r--r--arch/xtensa/boot/boot-redboot/boot.ld66
-rw-r--r--arch/xtensa/boot/boot-redboot/bootstrap.S246
-rw-r--r--arch/xtensa/boot/include/zlib.h433
-rw-r--r--arch/xtensa/boot/lib/Makefile6
-rw-r--r--arch/xtensa/boot/lib/memcpy.S36
-rw-r--r--arch/xtensa/boot/lib/zlib.c2150
-rw-r--r--arch/xtensa/boot/lib/zmem.c87
-rw-r--r--arch/xtensa/boot/ramdisk/Makefile23
13 files changed, 3279 insertions, 0 deletions
diff --git a/arch/xtensa/boot/Makefile b/arch/xtensa/boot/Makefile
new file mode 100644
index 000000000000..260f456ccf0b
--- /dev/null
+++ b/arch/xtensa/boot/Makefile
@@ -0,0 +1,37 @@
1#
2# arch/xtensa/boot/Makefile
3#
4# This file is subject to the terms and conditions of the GNU General Public
5# License. See the file "COPYING" in the main directory of this archive
6# for more details.
7#
8#
9
10
11CFLAGS += -fno-builtin -Iarch/$(ARCH)/boot/include
12HOSTFLAGS += -Iarch/$(ARCH)/boot/include
13
14BIG_ENDIAN := $(shell echo -e "\#ifdef __XTENSA_EL__\nint little;\n\#else\nint big;\n\#endif" | $(CC) -E -|grep -c big)
15
16
17export CFLAGS
18export AFLAGS
19export BIG_ENDIAN
20
21# Subdirs for the boot loader(s)
22
23bootdir-$(CONFIG_XTENSA_PLATFORM_ISS) += boot-elf
24bootdir-$(CONFIG_XTENSA_PLATFORM_XT2000) += boot-redboot boot-elf
25
26subdir-y := lib/
27
28subdir-y += boot-elf/ boot-redboot/
29
30zImage zImage.initrd Image Image.initrd: $(bootdir-y)
31
32$(bootdir-y): $(addprefix $(obj)/,$(subdir-y)) \
33 $(addprefix $(obj)/,$(host-progs))
34 $(Q)$(MAKE) $(build)=$(obj)/$@ $(MAKECMDGOALS)
35
36
37
diff --git a/arch/xtensa/boot/boot-elf/Makefile b/arch/xtensa/boot/boot-elf/Makefile
new file mode 100644
index 000000000000..f6ef6a369667
--- /dev/null
+++ b/arch/xtensa/boot/boot-elf/Makefile
@@ -0,0 +1,52 @@
1#
2# This file is subject to the terms and conditions of the GNU General Public
3# License. See the file "COPYING" in the main directory of this archive
4# for more details.
5#
6
7GZIP = gzip
8GZIP_FLAGS = -v9fc
9
10ifeq ($(BIG_ENDIAN),1)
11OBJCOPY_ARGS := -O elf32-xtensa-be
12else
13OBJCOPY_ARGS := -O elf32-xtensa-le
14endif
15
16export OBJCOPY_ARGS
17
18boot-y := bootstrap.o
19
20OBJS := $(addprefix $(obj)/,$(boot-y))
21
22Image: vmlinux $(OBJS)
23 $(OBJCOPY) --strip-all -R .comment -R .xt.insn -O binary \
24 vmlinux vmlinux.tmp
25 $(OBJCOPY) $(OBJCOPY_ARGS) -R .comment \
26 --add-section image=vmlinux.tmp \
27 --set-section-flags image=contents,alloc,load,load,data \
28 $(OBJS) $@.tmp
29 $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) \
30 -T arch/$(ARCH)/boot/boot-elf/boot.ld \
31 -o arch/$(ARCH)/boot/$@.elf $@.tmp
32 rm -f $@.tmp vmlinux.tmp
33
34Image.initrd: vmlinux $(OBJS)
35 $(OBJCOPY) --strip-all -R .comment -R .xt.insn -O binary \
36 --add-section .initrd=arch/$(ARCH)/boot/ramdisk \
37 --set-section-flags .initrd=contents,alloc,load,load,data \
38 vmlinux vmlinux.tmp
39 $(OBJCOPY) $(OBJCOPY_ARGS) -R .comment \
40 --add-section image=vmlinux.tmp \
41 --set-section-flags image=contents,alloc,load,load,data \
42 $(OBJS) $@.tmp
43 $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) \
44 -T arch/$(ARCH)/boot/boot-elf/boot.ld \
45 -o arch/$(ARCH)/boot/$@.elf $@.tmp
46 rm -f $@.tmp vmlinux.tmp
47
48
49zImage: Image
50
51zImage.initrd: Image.initrd
52
diff --git a/arch/xtensa/boot/boot-elf/boot.ld b/arch/xtensa/boot/boot-elf/boot.ld
new file mode 100644
index 000000000000..4ab06a0a7a6b
--- /dev/null
+++ b/arch/xtensa/boot/boot-elf/boot.ld
@@ -0,0 +1,71 @@
1OUTPUT_ARCH(xtensa)
2
3SECTIONS
4{
5 .start 0xD0000000 : { *(.start) }
6
7 .text 0xD0000000:
8 {
9 __reloc_start = . ;
10 _text_start = . ;
11 *(.literal .text.literal .text)
12 _text_end = . ;
13 }
14
15 .rodata ALIGN(0x04):
16 {
17 *(.rodata)
18 *(.rodata1)
19 }
20
21 .data ALIGN(0x04):
22 {
23 *(.data)
24 *(.data1)
25 *(.sdata)
26 *(.sdata2)
27 *(.got.plt)
28 *(.got)
29 *(.dynamic)
30 }
31
32 __reloc_end = . ;
33
34 .initrd ALIGN(0x10) :
35 {
36 boot_initrd_start = . ;
37 *(.initrd)
38 boot_initrd_end = .;
39 }
40
41 . = ALIGN(0x10);
42 __image_load = . ;
43 .image 0xd0001000:
44 {
45 _image_start = .;
46 *(image)
47 . = (. + 3) & ~ 3;
48 _image_end = . ;
49 }
50
51
52 .bss ((LOADADDR(.image) + SIZEOF(.image) + 3) & ~ 3):
53 {
54 __bss_start = .;
55 *(.sbss)
56 *(.scommon)
57 *(.dynbss)
58 *(.bss)
59 __bss_end = .;
60 }
61 _end = .;
62 _param_start = .;
63
64 .ResetVector.text 0xfe000020 :
65 {
66 *(.ResetVector.text)
67 }
68
69
70 PROVIDE (end = .);
71}
diff --git a/arch/xtensa/boot/boot-elf/bootstrap.S b/arch/xtensa/boot/boot-elf/bootstrap.S
new file mode 100644
index 000000000000..7cba94abdab8
--- /dev/null
+++ b/arch/xtensa/boot/boot-elf/bootstrap.S
@@ -0,0 +1,37 @@
1
2#include <xtensa/config/specreg.h>
3#include <xtensa/config/core.h>
4
5#include <linux/config.h>
6#include <asm/bootparam.h>
7
8
9/* ResetVector
10 */
11 .section .ResetVector.text, "ax"
12 .global _ResetVector
13_ResetVector:
14 _j reset
15 .align 4
16RomInitAddr:
17 .word 0xd0001000
18RomBootParam:
19 .word _bootparam
20reset:
21 l32r a0, RomInitAddr
22 l32r a2, RomBootParam
23 movi a3, 0
24 movi a4, 0
25 jx a0
26
27 .align 4
28 .section .bootstrap.data, "aw"
29
30 .globl _bootparam
31_bootparam:
32 .short BP_TAG_FIRST
33 .short 4
34 .long BP_VERSION
35 .short BP_TAG_LAST
36 .short 0
37 .long 0
diff --git a/arch/xtensa/boot/boot-redboot/Makefile b/arch/xtensa/boot/boot-redboot/Makefile
new file mode 100644
index 000000000000..ca8a68bc8472
--- /dev/null
+++ b/arch/xtensa/boot/boot-redboot/Makefile
@@ -0,0 +1,35 @@
1#
2# This file is subject to the terms and conditions of the GNU General Public
3# License. See the file "COPYING" in the main directory of this archive
4# for more details.
5#
6
7GZIP = gzip
8GZIP_FLAGS = -v9fc
9ifeq ($(BIG_ENDIAN),1)
10OBJCOPY_ARGS := -O elf32-xtensa-be
11else
12OBJCOPY_ARGS := -O elf32-xtensa-le
13endif
14
15LD_ARGS = -T $(obj)/boot.ld
16
17boot-y := bootstrap.o
18
19OBJS := $(addprefix $(obj)/,$(boot-y))
20LIBS := arch/$(ARCH)/boot/lib/lib.a arch/$(ARCH)/lib/lib.a
21
22LIBGCC := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
23
24zImage: vmlinux $(OBJS) $(LIBS)
25 $(OBJCOPY) --strip-all -R .comment -R .xt.insn -O binary \
26 $(TOPDIR)/vmlinux vmlinux.tmp
27 gzip -vf9 vmlinux.tmp
28 $(OBJCOPY) $(OBJCOPY_ARGS) -R .comment \
29 --add-section image=vmlinux.tmp.gz \
30 --set-section-flags image=contents,alloc,load,load,data \
31 $(OBJS) $@.tmp
32 $(LD) $(LD_ARGS) -o $@.elf $@.tmp $(LIBS) -L/xtensa-elf/lib $(LIBGCC)
33 $(OBJCOPY) -S -O binary $@.elf arch/$(ARCH)/boot/images/$@.redboot
34# rm -f $@.tmp $@.elf vmlinux.tmp.gz
35
diff --git a/arch/xtensa/boot/boot-redboot/boot.ld b/arch/xtensa/boot/boot-redboot/boot.ld
new file mode 100644
index 000000000000..65b726410e8a
--- /dev/null
+++ b/arch/xtensa/boot/boot-redboot/boot.ld
@@ -0,0 +1,66 @@
1OUTPUT_ARCH(xtensa)
2
3SECTIONS
4{
5 .start 0xD0200000 : { *(.start) }
6
7 .text :
8 {
9 __reloc_start = . ;
10 _text_start = . ;
11 *(.literal .text.literal .text)
12 _text_end = . ;
13 }
14
15 .rodata ALIGN(0x04):
16 {
17 *(.rodata)
18 *(.rodata1)
19 }
20
21 .data ALIGN(0x04):
22 {
23 *(.data)
24 *(.data1)
25 *(.sdata)
26 *(.sdata2)
27 *(.got.plt)
28 *(.got)
29 *(.dynamic)
30 }
31
32 __reloc_end = . ;
33
34 .initrd ALIGN(0x10) :
35 {
36 boot_initrd_start = . ;
37 *(.initrd)
38 boot_initrd_end = .;
39 }
40
41 . = ALIGN(0x10);
42 __image_load = . ;
43 .image 0xd0001000: AT(__image_load)
44 {
45 _image_start = .;
46 *(image)
47 . = (. + 3) & ~ 3;
48 _image_end = . ;
49 }
50
51
52 .bss ((LOADADDR(.image) + SIZEOF(.image) + 3) & ~ 3):
53 {
54 __bss_start = .;
55 *(.sbss)
56 *(.scommon)
57 *(.dynbss)
58 *(.bss)
59 __bss_end = .;
60 }
61 _end = .;
62 _param_start = .;
63
64
65 PROVIDE (end = .);
66}
diff --git a/arch/xtensa/boot/boot-redboot/bootstrap.S b/arch/xtensa/boot/boot-redboot/bootstrap.S
new file mode 100644
index 000000000000..ee636b0da81c
--- /dev/null
+++ b/arch/xtensa/boot/boot-redboot/bootstrap.S
@@ -0,0 +1,246 @@
1
2#define _ASMLANGUAGE
3#include <xtensa/config/specreg.h>
4#include <xtensa/config/core.h>
5#include <xtensa/cacheasm.h>
6
7 /*
8 * RB-Data: RedBoot data/bss
9 * P: Boot-Parameters
10 * L: Kernel-Loader
11 *
12 * The Linux-Kernel image including the loader must be loaded
13 * to a position so that the kernel and the boot parameters
14 * can fit in the space before the load address.
15 * ______________________________________________________
16 * |_RB-Data_|_P_|__________|_L_|___Linux-Kernel___|______|
17 * ^
18 * ^ Load address
19 * ______________________________________________________
20 * |___Linux-Kernel___|_P_|_L_|___________________________|
21 *
22 * The loader copies the parameter to the position that will
23 * be the end of the kernel and itself to the end of the
24 * parameter list.
25 */
26
27/* Make sure we have enough space for the 'uncompressor' */
28
29#define STACK_SIZE 32768
30#define HEAP_SIZE (131072*4)
31
32 # a2: Parameter list
33 # a3: Size of parameter list
34
35 .section .start, "ax"
36
37 .globl __start
38 /* this must be the first byte of the loader! */
39__start:
40 entry sp, 32 # we do not intend to return
41 _call0 _start
42__start_a0:
43 .align 4
44
45 .section .text, "ax"
46 .begin literal_prefix .text
47
48 /* put literals in here! */
49
50 .globl _start
51_start:
52
53 /* 'reset' window registers */
54
55 movi a4, 1
56 wsr a4, PS
57 rsync
58
59 rsr a5, WINDOWBASE
60 ssl a5
61 sll a4, a4
62 wsr a4, WINDOWSTART
63 rsync
64
65 movi a4, 0x00040000
66 wsr a4, PS
67 rsync
68
69 /* copy the loader to its address
70 * Note: The loader itself is a very small piece, so we assume we
71 * don't partially overlap. We also assume (even more important)
72 * that the kernel image is out of the way. Usually, when the
73 * load address of this image is not at an arbitrary address,
74 * but aligned to some 10K's we shouldn't overlap.
75 */
76
77 /* Note: The assembler cannot relax "addi a0, a0, ..." to an
78 l32r, so we load to a4 first. */
79
80 addi a4, a0, __start - __start_a0
81 mov a0, a4
82 movi a4, __start
83 movi a5, __reloc_end
84
85 # a0: address where this code has been loaded
86 # a4: compiled address of __start
87 # a5: compiled end address
88
89 mov.n a7, a0
90 mov.n a8, a4
91
921:
93 l32i a10, a7, 0
94 l32i a11, a7, 4
95 s32i a10, a8, 0
96 s32i a11, a8, 4
97 l32i a10, a7, 8
98 l32i a11, a7, 12
99 s32i a10, a8, 8
100 s32i a11, a8, 12
101 addi a8, a8, 16
102 addi a7, a7, 16
103 blt a8, a5, 1b
104
105
106 /* We have to flush and invalidate the caches here before we jump. */
107
108#if XCHAL_DCACHE_IS_WRITEBACK
109 dcache_writeback_all a5, a6
110#endif
111 icache_invalidate_all a5, a6
112
113 movi a11, _reloc
114 jx a11
115
116 .globl _reloc
117_reloc:
118
119 /* RedBoot is now at the end of the memory, so we don't have
120 * to copy the parameter list. Keep the code around; in case
121 * we need it again. */
122#if 0
123 # a0: load address
124 # a2: start address of parameter list
125 # a3: length of parameter list
126 # a4: __start
127
128 /* copy the parameter list out of the way */
129
130 movi a6, _param_start
131 add a3, a2, a3
1322:
133 l32i a8, a2, 0
134 s32i a8, a6, 0
135 addi a2, a2, 4
136 addi a6, a6, 4
137 blt a2, a3, 2b
138#endif
139
140 /* clear BSS section */
141 movi a6, __bss_start
142 movi a7, __bss_end
143 movi.n a5, 0
1443:
145 s32i a5, a6, 0
146 addi a6, a6, 4
147 blt a6, a7, 3b
148
149 movi a5, -16
150 movi a1, _stack + STACK_SIZE
151 and a1, a1, a5
152
153 /* Uncompress the kernel */
154
155 # a0: load address
156 # a2: boot parameter
157 # a4: __start
158
159 movi a3, __image_load
160 sub a4, a3, a4
161 add a8, a0, a4
162
163 # a1 Stack
164 # a8(a4) Load address of the image
165
166 movi a6, _image_start
167 movi a10, _image_end
168 movi a7, 0x1000000
169 sub a11, a10, a6
170 movi a9, complen
171 s32i a11, a9, 0
172
173 movi a0, 0
174
175 # a6 destination
176 # a7 maximum size of destination
177 # a8 source
178 # a9 ptr to length
179
180 .extern gunzip
181 movi a4, gunzip
182 beqz a4, 1f
183
184 callx4 a4
185
186 j 2f
187
188
189 # a6 destination start
190 # a7 maximum size of destination
191 # a8 source start
192 # a9 ptr to length
193 # a10 destination end
194
1951:
196 l32i a9, a8, 0
197 l32i a11, a8, 4
198 s32i a9, a6, 0
199 s32i a11, a6, 4
200 l32i a9, a8, 8
201 l32i a11, a8, 12
202 s32i a9, a6, 8
203 s32i a11, a6, 12
204 addi a6, a6, 16
205 addi a8, a8, 16
206 blt a6, a10, 1b
207
208
209 /* jump to the kernel */
2102:
211#if XCHAL_DCACHE_IS_WRITEBACK
212 dcache_writeback_all a5, a6
213#endif
214 icache_invalidate_all a5, a6
215
216 movi a5, __start
217 movi a3, boot_initrd_start
218 movi a4, boot_initrd_end
219 sub a3, a3, a5
220 sub a4, a4, a5
221 add a3, a0, a3
222 add a4, a0, a4
223
224 # a2 Boot parameter list
225 # a3 initrd_start (virtual load address)
226 # a4 initrd_end (virtual load address)
227
228 movi a0, _image_start
229 jx a0
230
231 .align 16
232 .data
233 .globl avail_ram
234avail_ram:
235 .long _heap
236 .globl end_avail
237end_avail:
238 .long _heap + HEAP_SIZE
239
240 .comm _stack, STACK_SIZE
241 .comm _heap, HEAP_SIZE
242
243 .globl end_avail
244 .comm complen, 4
245
246 .end literal_prefix
diff --git a/arch/xtensa/boot/include/zlib.h b/arch/xtensa/boot/include/zlib.h
new file mode 100644
index 000000000000..ea29b6237852
--- /dev/null
+++ b/arch/xtensa/boot/include/zlib.h
@@ -0,0 +1,433 @@
1/*
2 * BK Id: SCCS/s.zlib.h 1.8 05/18/01 15:17:23 cort
3 */
4/*
5 * This file is derived from zlib.h and zconf.h from the zlib-0.95
6 * distribution by Jean-loup Gailly and Mark Adler, with some additions
7 * by Paul Mackerras to aid in implementing Deflate compression and
8 * decompression for PPP packets.
9 */
10
11/*
12 * ==FILEVERSION 960122==
13 *
14 * This marker is used by the Linux installation script to determine
15 * whether an up-to-date version of this file is already installed.
16 */
17
18/* zlib.h -- interface of the 'zlib' general purpose compression library
19 version 0.95, Aug 16th, 1995.
20
21 Copyright (C) 1995 Jean-loup Gailly and Mark Adler
22
23 This software is provided 'as-is', without any express or implied
24 warranty. In no event will the authors be held liable for any damages
25 arising from the use of this software.
26
27 Permission is granted to anyone to use this software for any purpose,
28 including commercial applications, and to alter it and redistribute it
29 freely, subject to the following restrictions:
30
31 1. The origin of this software must not be misrepresented; you must not
32 claim that you wrote the original software. If you use this software
33 in a product, an acknowledgment in the product documentation would be
34 appreciated but is not required.
35 2. Altered source versions must be plainly marked as such, and must not be
36 misrepresented as being the original software.
37 3. This notice may not be removed or altered from any source distribution.
38
39 Jean-loup Gailly Mark Adler
40 gzip@prep.ai.mit.edu madler@alumni.caltech.edu
41 */
42
43#ifndef _ZLIB_H
44#define _ZLIB_H
45
46/* #include "zconf.h" */ /* included directly here */
47
48/* zconf.h -- configuration of the zlib compression library
49 * Copyright (C) 1995 Jean-loup Gailly.
50 * For conditions of distribution and use, see copyright notice in zlib.h
51 */
52
53/* From: zconf.h,v 1.12 1995/05/03 17:27:12 jloup Exp */
54
55/*
56 The library does not install any signal handler. It is recommended to
57 add at least a handler for SIGSEGV when decompressing; the library checks
58 the consistency of the input data whenever possible but may go nuts
59 for some forms of corrupted input.
60 */
61
62/*
63 * Compile with -DMAXSEG_64K if the alloc function cannot allocate more
64 * than 64k bytes at a time (needed on systems with 16-bit int).
65 * Compile with -DUNALIGNED_OK if it is OK to access shorts or ints
66 * at addresses which are not a multiple of their size.
67 * Under DOS, -DFAR=far or -DFAR=__far may be needed.
68 */
69
70#ifndef STDC
71# if defined(MSDOS) || defined(__STDC__) || defined(__cplusplus)
72# define STDC
73# endif
74#endif
75
76#ifdef __MWERKS__ /* Metrowerks CodeWarrior declares fileno() in unix.h */
77# include <unix.h>
78#endif
79
80/* Maximum value for memLevel in deflateInit2 */
81#ifndef MAX_MEM_LEVEL
82# ifdef MAXSEG_64K
83# define MAX_MEM_LEVEL 8
84# else
85# define MAX_MEM_LEVEL 9
86# endif
87#endif
88
89#ifndef FAR
90# define FAR
91#endif
92
93/* Maximum value for windowBits in deflateInit2 and inflateInit2 */
94#ifndef MAX_WBITS
95# define MAX_WBITS 15 /* 32K LZ77 window */
96#endif
97
98/* The memory requirements for deflate are (in bytes):
99 1 << (windowBits+2) + 1 << (memLevel+9)
100 that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
101 plus a few kilobytes for small objects. For example, if you want to reduce
102 the default memory requirements from 256K to 128K, compile with
103 make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
104 Of course this will generally degrade compression (there's no free lunch).
105
106 The memory requirements for inflate are (in bytes) 1 << windowBits
107 that is, 32K for windowBits=15 (default value) plus a few kilobytes
108 for small objects.
109*/
110
111 /* Type declarations */
112
113#ifndef OF /* function prototypes */
114# ifdef STDC
115# define OF(args) args
116# else
117# define OF(args) ()
118# endif
119#endif
120
121typedef unsigned char Byte; /* 8 bits */
122typedef unsigned int uInt; /* 16 bits or more */
123typedef unsigned long uLong; /* 32 bits or more */
124
125typedef Byte FAR Bytef;
126typedef char FAR charf;
127typedef int FAR intf;
128typedef uInt FAR uIntf;
129typedef uLong FAR uLongf;
130
131#ifdef STDC
132 typedef void FAR *voidpf;
133 typedef void *voidp;
134#else
135 typedef Byte FAR *voidpf;
136 typedef Byte *voidp;
137#endif
138
139/* end of original zconf.h */
140
141#define ZLIB_VERSION "0.95P"
142
143/*
144 The 'zlib' compression library provides in-memory compression and
145 decompression functions, including integrity checks of the uncompressed
146 data. This version of the library supports only one compression method
147 (deflation) but other algorithms may be added later and will have the same
148 stream interface.
149
150 For compression the application must provide the output buffer and
151 may optionally provide the input buffer for optimization. For decompression,
152 the application must provide the input buffer and may optionally provide
153 the output buffer for optimization.
154
155 Compression can be done in a single step if the buffers are large
156 enough (for example if an input file is mmap'ed), or can be done by
157 repeated calls of the compression function. In the latter case, the
158 application must provide more input and/or consume the output
159 (providing more output space) before each call.
160*/
161
162typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
163typedef void (*free_func) OF((voidpf opaque, voidpf address, uInt nbytes));
164
165struct internal_state;
166
167typedef struct z_stream_s {
168 Bytef *next_in; /* next input byte */
169 uInt avail_in; /* number of bytes available at next_in */
170 uLong total_in; /* total nb of input bytes read so far */
171
172 Bytef *next_out; /* next output byte should be put there */
173 uInt avail_out; /* remaining free space at next_out */
174 uLong total_out; /* total nb of bytes output so far */
175
176 char *msg; /* last error message, NULL if no error */
177 struct internal_state FAR *state; /* not visible by applications */
178
179 alloc_func zalloc; /* used to allocate the internal state */
180 free_func zfree; /* used to free the internal state */
181 voidp opaque; /* private data object passed to zalloc and zfree */
182
183 Byte data_type; /* best guess about the data type: ascii or binary */
184
185} z_stream;
186
187/*
188 The application must update next_in and avail_in when avail_in has
189 dropped to zero. It must update next_out and avail_out when avail_out
190 has dropped to zero. The application must initialize zalloc, zfree and
191 opaque before calling the init function. All other fields are set by the
192 compression library and must not be updated by the application.
193
194 The opaque value provided by the application will be passed as the first
195 parameter for calls of zalloc and zfree. This can be useful for custom
196 memory management. The compression library attaches no meaning to the
197 opaque value.
198
199 zalloc must return Z_NULL if there is not enough memory for the object.
200 On 16-bit systems, the functions zalloc and zfree must be able to allocate
201 exactly 65536 bytes, but will not be required to allocate more than this
202 if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
203 pointers returned by zalloc for objects of exactly 65536 bytes *must*
204 have their offset normalized to zero. The default allocation function
205 provided by this library ensures this (see zutil.c). To reduce memory
206 requirements and avoid any allocation of 64K objects, at the expense of
207 compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
208
209 The fields total_in and total_out can be used for statistics or
210 progress reports. After compression, total_in holds the total size of
211 the uncompressed data and may be saved for use in the decompressor
212 (particularly if the decompressor wants to decompress everything in
213 a single step).
214*/
215
216 /* constants */
217
218#define Z_NO_FLUSH 0
219#define Z_PARTIAL_FLUSH 1
220#define Z_FULL_FLUSH 2
221#define Z_SYNC_FLUSH 3 /* experimental: partial_flush + byte align */
222#define Z_FINISH 4
223#define Z_PACKET_FLUSH 5
224/* See deflate() below for the usage of these constants */
225
226#define Z_OK 0
227#define Z_STREAM_END 1
228#define Z_ERRNO (-1)
229#define Z_STREAM_ERROR (-2)
230#define Z_DATA_ERROR (-3)
231#define Z_MEM_ERROR (-4)
232#define Z_BUF_ERROR (-5)
233/* error codes for the compression/decompression functions */
234
235#define Z_BEST_SPEED 1
236#define Z_BEST_COMPRESSION 9
237#define Z_DEFAULT_COMPRESSION (-1)
238/* compression levels */
239
240#define Z_FILTERED 1
241#define Z_HUFFMAN_ONLY 2
242#define Z_DEFAULT_STRATEGY 0
243
244#define Z_BINARY 0
245#define Z_ASCII 1
246#define Z_UNKNOWN 2
247/* Used to set the data_type field */
248
249#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */
250
251extern char *zlib_version;
252/* The application can compare zlib_version and ZLIB_VERSION for consistency.
253 If the first character differs, the library code actually used is
254 not compatible with the zlib.h header file used by the application.
255 */
256
257 /* basic functions */
258
259extern int inflateInit OF((z_stream *strm));
260/*
261 Initializes the internal stream state for decompression. The fields
262 zalloc and zfree must be initialized before by the caller. If zalloc and
263 zfree are set to Z_NULL, inflateInit updates them to use default allocation
264 functions.
265
266 inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not
267 enough memory. msg is set to null if there is no error message.
268 inflateInit does not perform any decompression: this will be done by
269 inflate().
270*/
271
272
273extern int inflate OF((z_stream *strm, int flush));
274/*
275 Performs one or both of the following actions:
276
277 - Decompress more input starting at next_in and update next_in and avail_in
278 accordingly. If not all input can be processed (because there is not
279 enough room in the output buffer), next_in is updated and processing
280 will resume at this point for the next call of inflate().
281
282 - Provide more output starting at next_out and update next_out and avail_out
283 accordingly. inflate() always provides as much output as possible
284 (until there is no more input data or no more space in the output buffer).
285
286 Before the call of inflate(), the application should ensure that at least
287 one of the actions is possible, by providing more input and/or consuming
288 more output, and updating the next_* and avail_* values accordingly.
289 The application can consume the uncompressed output when it wants, for
290 example when the output buffer is full (avail_out == 0), or after each
291 call of inflate().
292
293 If the parameter flush is set to Z_PARTIAL_FLUSH or Z_PACKET_FLUSH,
294 inflate flushes as much output as possible to the output buffer. The
295 flushing behavior of inflate is not specified for values of the flush
296 parameter other than Z_PARTIAL_FLUSH, Z_PACKET_FLUSH or Z_FINISH, but the
297 current implementation actually flushes as much output as possible
298 anyway. For Z_PACKET_FLUSH, inflate checks that once all the input data
299 has been consumed, it is expecting to see the length field of a stored
300 block; if not, it returns Z_DATA_ERROR.
301
302 inflate() should normally be called until it returns Z_STREAM_END or an
303 error. However if all decompression is to be performed in a single step
304 (a single call of inflate), the parameter flush should be set to
305 Z_FINISH. In this case all pending input is processed and all pending
306 output is flushed; avail_out must be large enough to hold all the
307 uncompressed data. (The size of the uncompressed data may have been saved
308 by the compressor for this purpose.) The next operation on this stream must
309 be inflateEnd to deallocate the decompression state. The use of Z_FINISH
310 is never required, but can be used to inform inflate that a faster routine
311 may be used for the single inflate() call.
312
313 inflate() returns Z_OK if some progress has been made (more input
314 processed or more output produced), Z_STREAM_END if the end of the
315 compressed data has been reached and all uncompressed output has been
316 produced, Z_DATA_ERROR if the input data was corrupted, Z_STREAM_ERROR if
317 the stream structure was inconsistent (for example if next_in or next_out
318 was NULL), Z_MEM_ERROR if there was not enough memory, Z_BUF_ERROR if no
319 progress is possible or if there was not enough room in the output buffer
320 when Z_FINISH is used. In the Z_DATA_ERROR case, the application may then
321 call inflateSync to look for a good compression block. */
322
323
324extern int inflateEnd OF((z_stream *strm));
325/*
326 All dynamically allocated data structures for this stream are freed.
327 This function discards any unprocessed input and does not flush any
328 pending output.
329
330 inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
331 was inconsistent. In the error case, msg may be set but then points to a
332 static string (which must not be deallocated).
333*/
334
335 /* advanced functions */
336
337extern int inflateInit2 OF((z_stream *strm,
338 int windowBits));
339/*
340 This is another version of inflateInit with more compression options. The
341 fields next_out, zalloc and zfree must be initialized before by the caller.
342
343 The windowBits parameter is the base two logarithm of the maximum window
344 size (the size of the history buffer). It should be in the range 8..15 for
345 this version of the library (the value 16 will be allowed soon). The
346 default value is 15 if inflateInit is used instead. If a compressed stream
347 with a larger window size is given as input, inflate() will return with
348 the error code Z_DATA_ERROR instead of trying to allocate a larger window.
349
350 If next_out is not null, the library will use this buffer for the history
351 buffer; the buffer must either be large enough to hold the entire output
352 data, or have at least 1<<windowBits bytes. If next_out is null, the
353 library will allocate its own buffer (and leave next_out null). next_in
354 need not be provided here but must be provided by the application for the
355 next call of inflate().
356
357 If the history buffer is provided by the application, next_out must
358 never be changed by the application since the decompressor maintains
359 history information inside this buffer from call to call; the application
360 can only reset next_out to the beginning of the history buffer when
361 avail_out is zero and all output has been consumed.
362
363 inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was
364 not enough memory, Z_STREAM_ERROR if a parameter is invalid (such as
365 windowBits < 8). msg is set to null if there is no error message.
366 inflateInit2 does not perform any decompression: this will be done by
367 inflate().
368*/
369
370extern int inflateSync OF((z_stream *strm));
371/*
372 Skips invalid compressed data until the special marker (see deflate()
373 above) can be found, or until all available input is skipped. No output
374 is provided.
375
376 inflateSync returns Z_OK if the special marker has been found, Z_BUF_ERROR
377 if no more input was provided, Z_DATA_ERROR if no marker has been found,
378 or Z_STREAM_ERROR if the stream structure was inconsistent. In the success
379 case, the application may save the current current value of total_in which
380 indicates where valid compressed data was found. In the error case, the
381 application may repeatedly call inflateSync, providing more input each time,
382 until success or end of the input data.
383*/
384
385extern int inflateReset OF((z_stream *strm));
386/*
387 This function is equivalent to inflateEnd followed by inflateInit,
388 but does not free and reallocate all the internal decompression state.
389 The stream will keep attributes that may have been set by inflateInit2.
390
391 inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
392 stream state was inconsistent (such as zalloc or state being NULL).
393*/
394
395extern int inflateIncomp OF((z_stream *strm));
396/*
397 This function adds the data at next_in (avail_in bytes) to the output
398 history without performing any output. There must be no pending output,
399 and the decompressor must be expecting to see the start of a block.
400 Calling this function is equivalent to decompressing a stored block
401 containing the data at next_in (except that the data is not output).
402*/
403
404 /* checksum functions */
405
406/*
407 This function is not related to compression but is exported
408 anyway because it might be useful in applications using the
409 compression library.
410*/
411
412extern uLong adler32 OF((uLong adler, Bytef *buf, uInt len));
413
414/*
415 Update a running Adler-32 checksum with the bytes buf[0..len-1] and
416 return the updated checksum. If buf is NULL, this function returns
417 the required initial value for the checksum.
418 An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
419 much faster. Usage example:
420
421 uLong adler = adler32(0L, Z_NULL, 0);
422
423 while (read_buffer(buffer, length) != EOF) {
424 adler = adler32(adler, buffer, length);
425 }
426 if (adler != original_adler) error();
427*/
428
429#ifndef _Z_UTIL_H
430 struct internal_state {int dummy;}; /* hack for buggy compilers */
431#endif
432
433#endif /* _ZLIB_H */
diff --git a/arch/xtensa/boot/lib/Makefile b/arch/xtensa/boot/lib/Makefile
new file mode 100644
index 000000000000..c0a74dc3a0df
--- /dev/null
+++ b/arch/xtensa/boot/lib/Makefile
@@ -0,0 +1,6 @@
1#
2# Makefile for some libs needed by zImage.
3#
4
5
6lib-y := zlib.o zmem.o
diff --git a/arch/xtensa/boot/lib/memcpy.S b/arch/xtensa/boot/lib/memcpy.S
new file mode 100644
index 000000000000..a029f5df2d5c
--- /dev/null
+++ b/arch/xtensa/boot/lib/memcpy.S
@@ -0,0 +1,36 @@
1/*
2 * arch/xtensa/lib/memcpy.S
3 *
4 * ANSI C standard library function memcpy
5 *
6 * This file is subject to the terms and conditions of the GNU General
7 * Public License. See the file "COPYING" in the main directory of
8 * this archive for more details.
9 *
10 * Copyright (C) 2002 Tensilica Inc.
11 */
12
13#define _ASMLANGUAGE
14#include <xtensa/config/core.h>
15
16.text
17.align 4
18.global bcopy
19.type bcopy,@function
20bcopy:
21 movi a14, xthal_bcopy // a14 safe to use regardless of whether caller
22 // used call4 or call8 (can't have used call12)
23 jx a14 // let the Core HAL do the work
24
25.text
26.align 4
27.global memcpy
28.type memcpy,@function
29memcpy:
30.global memmove
31.type memmove,@function
32memmove:
33 movi a14, xthal_memcpy // a14 safe to use regardless of whether caller
34 // used call4 or call8 (can't have used call12)
35 jx a14 // let the Core HAL do the work
36
diff --git a/arch/xtensa/boot/lib/zlib.c b/arch/xtensa/boot/lib/zlib.c
new file mode 100644
index 000000000000..e3859f631077
--- /dev/null
+++ b/arch/xtensa/boot/lib/zlib.c
@@ -0,0 +1,2150 @@
1/*
2 * BK Id: SCCS/s.zlib.c 1.8 05/18/01 15:17:24 cort
3 */
4/*
5 * This file is derived from various .h and .c files from the zlib-0.95
6 * distribution by Jean-loup Gailly and Mark Adler, with some additions
7 * by Paul Mackerras to aid in implementing Deflate compression and
8 * decompression for PPP packets. See zlib.h for conditions of
9 * distribution and use.
10 *
11 * Changes that have been made include:
12 * - changed functions not used outside this file to "local"
13 * - added minCompression parameter to deflateInit2
14 * - added Z_PACKET_FLUSH (see zlib.h for details)
15 * - added inflateIncomp
16 *
17 */
18
19/*+++++*/
20/* zutil.h -- internal interface and configuration of the compression library
21 * Copyright (C) 1995 Jean-loup Gailly.
22 * For conditions of distribution and use, see copyright notice in zlib.h
23 */
24
25/* WARNING: this file should *not* be used by applications. It is
26 part of the implementation of the compression library and is
27 subject to change. Applications should only use zlib.h.
28 */
29
30/* From: zutil.h,v 1.9 1995/05/03 17:27:12 jloup Exp */
31
32#define _Z_UTIL_H
33
34#include "zlib.h"
35
36#ifndef local
37# define local static
38#endif
39/* compile with -Dlocal if your debugger can't find static symbols */
40
41#define FAR
42
43typedef unsigned char uch;
44typedef uch FAR uchf;
45typedef unsigned short ush;
46typedef ush FAR ushf;
47typedef unsigned long ulg;
48
49extern char *z_errmsg[]; /* indexed by 1-zlib_error */
50
51#define ERR_RETURN(strm,err) return (strm->msg=z_errmsg[1-err], err)
52/* To be used only when the state is known to be valid */
53
54#ifndef NULL
55#define NULL ((void *) 0)
56#endif
57
58 /* common constants */
59
60#define DEFLATED 8
61
62#ifndef DEF_WBITS
63# define DEF_WBITS MAX_WBITS
64#endif
65/* default windowBits for decompression. MAX_WBITS is for compression only */
66
67#if MAX_MEM_LEVEL >= 8
68# define DEF_MEM_LEVEL 8
69#else
70# define DEF_MEM_LEVEL MAX_MEM_LEVEL
71#endif
72/* default memLevel */
73
74#define STORED_BLOCK 0
75#define STATIC_TREES 1
76#define DYN_TREES 2
77/* The three kinds of block type */
78
79#define MIN_MATCH 3
80#define MAX_MATCH 258
81/* The minimum and maximum match lengths */
82
83 /* functions */
84
85#include <linux/string.h>
86#define zmemcpy memcpy
87#define zmemzero(dest, len) memset(dest, 0, len)
88
89/* Diagnostic functions */
90#ifdef DEBUG_ZLIB
91# include <stdio.h>
92# ifndef verbose
93# define verbose 0
94# endif
95# define Assert(cond,msg) {if(!(cond)) z_error(msg);}
96# define Trace(x) fprintf x
97# define Tracev(x) {if (verbose) fprintf x ;}
98# define Tracevv(x) {if (verbose>1) fprintf x ;}
99# define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
100# define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
101#else
102# define Assert(cond,msg)
103# define Trace(x)
104# define Tracev(x)
105# define Tracevv(x)
106# define Tracec(c,x)
107# define Tracecv(c,x)
108#endif
109
110
111typedef uLong (*check_func) OF((uLong check, Bytef *buf, uInt len));
112
113/* voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size)); */
114/* void zcfree OF((voidpf opaque, voidpf ptr)); */
115
116#define ZALLOC(strm, items, size) \
117 (*((strm)->zalloc))((strm)->opaque, (items), (size))
118#define ZFREE(strm, addr, size) \
119 (*((strm)->zfree))((strm)->opaque, (voidpf)(addr), (size))
120#define TRY_FREE(s, p, n) {if (p) ZFREE(s, p, n);}
121
122/* deflate.h -- internal compression state
123 * Copyright (C) 1995 Jean-loup Gailly
124 * For conditions of distribution and use, see copyright notice in zlib.h
125 */
126
127/* WARNING: this file should *not* be used by applications. It is
128 part of the implementation of the compression library and is
129 subject to change. Applications should only use zlib.h.
130 */
131
132/*+++++*/
133/* infblock.h -- header to use infblock.c
134 * Copyright (C) 1995 Mark Adler
135 * For conditions of distribution and use, see copyright notice in zlib.h
136 */
137
138/* WARNING: this file should *not* be used by applications. It is
139 part of the implementation of the compression library and is
140 subject to change. Applications should only use zlib.h.
141 */
142
143struct inflate_blocks_state;
144typedef struct inflate_blocks_state FAR inflate_blocks_statef;
145
146local inflate_blocks_statef * inflate_blocks_new OF((
147 z_stream *z,
148 check_func c, /* check function */
149 uInt w)); /* window size */
150
151local int inflate_blocks OF((
152 inflate_blocks_statef *,
153 z_stream *,
154 int)); /* initial return code */
155
156local void inflate_blocks_reset OF((
157 inflate_blocks_statef *,
158 z_stream *,
159 uLongf *)); /* check value on output */
160
161local int inflate_blocks_free OF((
162 inflate_blocks_statef *,
163 z_stream *,
164 uLongf *)); /* check value on output */
165
166local int inflate_addhistory OF((
167 inflate_blocks_statef *,
168 z_stream *));
169
170local int inflate_packet_flush OF((
171 inflate_blocks_statef *));
172
173/*+++++*/
174/* inftrees.h -- header to use inftrees.c
175 * Copyright (C) 1995 Mark Adler
176 * For conditions of distribution and use, see copyright notice in zlib.h
177 */
178
179/* WARNING: this file should *not* be used by applications. It is
180 part of the implementation of the compression library and is
181 subject to change. Applications should only use zlib.h.
182 */
183
184/* Huffman code lookup table entry--this entry is four bytes for machines
185 that have 16-bit pointers (e.g. PC's in the small or medium model). */
186
187typedef struct inflate_huft_s FAR inflate_huft;
188
189struct inflate_huft_s {
190 union {
191 struct {
192 Byte Exop; /* number of extra bits or operation */
193 Byte Bits; /* number of bits in this code or subcode */
194 } what;
195 uInt Nalloc; /* number of these allocated here */
196 Bytef *pad; /* pad structure to a power of 2 (4 bytes for */
197 } word; /* 16-bit, 8 bytes for 32-bit machines) */
198 union {
199 uInt Base; /* literal, length base, or distance base */
200 inflate_huft *Next; /* pointer to next level of table */
201 } more;
202};
203
204#ifdef DEBUG_ZLIB
205 local uInt inflate_hufts;
206#endif
207
208local int inflate_trees_bits OF((
209 uIntf *, /* 19 code lengths */
210 uIntf *, /* bits tree desired/actual depth */
211 inflate_huft * FAR *, /* bits tree result */
212 z_stream *)); /* for zalloc, zfree functions */
213
214local int inflate_trees_dynamic OF((
215 uInt, /* number of literal/length codes */
216 uInt, /* number of distance codes */
217 uIntf *, /* that many (total) code lengths */
218 uIntf *, /* literal desired/actual bit depth */
219 uIntf *, /* distance desired/actual bit depth */
220 inflate_huft * FAR *, /* literal/length tree result */
221 inflate_huft * FAR *, /* distance tree result */
222 z_stream *)); /* for zalloc, zfree functions */
223
224local int inflate_trees_fixed OF((
225 uIntf *, /* literal desired/actual bit depth */
226 uIntf *, /* distance desired/actual bit depth */
227 inflate_huft * FAR *, /* literal/length tree result */
228 inflate_huft * FAR *)); /* distance tree result */
229
230local int inflate_trees_free OF((
231 inflate_huft *, /* tables to free */
232 z_stream *)); /* for zfree function */
233
234
235/*+++++*/
236/* infcodes.h -- header to use infcodes.c
237 * Copyright (C) 1995 Mark Adler
238 * For conditions of distribution and use, see copyright notice in zlib.h
239 */
240
241/* WARNING: this file should *not* be used by applications. It is
242 part of the implementation of the compression library and is
243 subject to change. Applications should only use zlib.h.
244 */
245
246struct inflate_codes_state;
247typedef struct inflate_codes_state FAR inflate_codes_statef;
248
249local inflate_codes_statef *inflate_codes_new OF((
250 uInt, uInt,
251 inflate_huft *, inflate_huft *,
252 z_stream *));
253
254local int inflate_codes OF((
255 inflate_blocks_statef *,
256 z_stream *,
257 int));
258
259local void inflate_codes_free OF((
260 inflate_codes_statef *,
261 z_stream *));
262
263
264/*+++++*/
265/* inflate.c -- zlib interface to inflate modules
266 * Copyright (C) 1995 Mark Adler
267 * For conditions of distribution and use, see copyright notice in zlib.h
268 */
269
270/* inflate private state */
271struct internal_state {
272
273 /* mode */
274 enum {
275 METHOD, /* waiting for method byte */
276 FLAG, /* waiting for flag byte */
277 BLOCKS, /* decompressing blocks */
278 CHECK4, /* four check bytes to go */
279 CHECK3, /* three check bytes to go */
280 CHECK2, /* two check bytes to go */
281 CHECK1, /* one check byte to go */
282 DONE, /* finished check, done */
283 BAD} /* got an error--stay here */
284 mode; /* current inflate mode */
285
286 /* mode dependent information */
287 union {
288 uInt method; /* if FLAGS, method byte */
289 struct {
290 uLong was; /* computed check value */
291 uLong need; /* stream check value */
292 } check; /* if CHECK, check values to compare */
293 uInt marker; /* if BAD, inflateSync's marker bytes count */
294 } sub; /* submode */
295
296 /* mode independent information */
297 int nowrap; /* flag for no wrapper */
298 uInt wbits; /* log2(window size) (8..15, defaults to 15) */
299 inflate_blocks_statef
300 *blocks; /* current inflate_blocks state */
301
302};
303
304
305int inflateReset(z)
306z_stream *z;
307{
308 uLong c;
309
310 if (z == Z_NULL || z->state == Z_NULL)
311 return Z_STREAM_ERROR;
312 z->total_in = z->total_out = 0;
313 z->msg = Z_NULL;
314 z->state->mode = z->state->nowrap ? BLOCKS : METHOD;
315 inflate_blocks_reset(z->state->blocks, z, &c);
316 Trace((stderr, "inflate: reset\n"));
317 return Z_OK;
318}
319
320
321int inflateEnd(z)
322z_stream *z;
323{
324 uLong c;
325
326 if (z == Z_NULL || z->state == Z_NULL || z->zfree == Z_NULL)
327 return Z_STREAM_ERROR;
328 if (z->state->blocks != Z_NULL)
329 inflate_blocks_free(z->state->blocks, z, &c);
330 ZFREE(z, z->state, sizeof(struct internal_state));
331 z->state = Z_NULL;
332 Trace((stderr, "inflate: end\n"));
333 return Z_OK;
334}
335
336
337int inflateInit2(z, w)
338z_stream *z;
339int w;
340{
341 /* initialize state */
342 if (z == Z_NULL)
343 return Z_STREAM_ERROR;
344/* if (z->zalloc == Z_NULL) z->zalloc = zcalloc; */
345/* if (z->zfree == Z_NULL) z->zfree = zcfree; */
346 if ((z->state = (struct internal_state FAR *)
347 ZALLOC(z,1,sizeof(struct internal_state))) == Z_NULL)
348 return Z_MEM_ERROR;
349 z->state->blocks = Z_NULL;
350
351 /* handle undocumented nowrap option (no zlib header or check) */
352 z->state->nowrap = 0;
353 if (w < 0)
354 {
355 w = - w;
356 z->state->nowrap = 1;
357 }
358
359 /* set window size */
360 if (w < 8 || w > 15)
361 {
362 inflateEnd(z);
363 return Z_STREAM_ERROR;
364 }
365 z->state->wbits = (uInt)w;
366
367 /* create inflate_blocks state */
368 if ((z->state->blocks =
369 inflate_blocks_new(z, z->state->nowrap ? Z_NULL : adler32, 1 << w))
370 == Z_NULL)
371 {
372 inflateEnd(z);
373 return Z_MEM_ERROR;
374 }
375 Trace((stderr, "inflate: allocated\n"));
376
377 /* reset state */
378 inflateReset(z);
379 return Z_OK;
380}
381
382
383int inflateInit(z)
384z_stream *z;
385{
386 return inflateInit2(z, DEF_WBITS);
387}
388
389
390#define NEEDBYTE {if(z->avail_in==0)goto empty;r=Z_OK;}
391#define NEXTBYTE (z->avail_in--,z->total_in++,*z->next_in++)
392
393int inflate(z, f)
394z_stream *z;
395int f;
396{
397 int r;
398 uInt b;
399
400 if (z == Z_NULL || z->next_in == Z_NULL)
401 return Z_STREAM_ERROR;
402 r = Z_BUF_ERROR;
403 while (1) switch (z->state->mode)
404 {
405 case METHOD:
406 NEEDBYTE
407 if (((z->state->sub.method = NEXTBYTE) & 0xf) != DEFLATED)
408 {
409 z->state->mode = BAD;
410 z->msg = "unknown compression method";
411 z->state->sub.marker = 5; /* can't try inflateSync */
412 break;
413 }
414 if ((z->state->sub.method >> 4) + 8 > z->state->wbits)
415 {
416 z->state->mode = BAD;
417 z->msg = "invalid window size";
418 z->state->sub.marker = 5; /* can't try inflateSync */
419 break;
420 }
421 z->state->mode = FLAG;
422 case FLAG:
423 NEEDBYTE
424 if ((b = NEXTBYTE) & 0x20)
425 {
426 z->state->mode = BAD;
427 z->msg = "invalid reserved bit";
428 z->state->sub.marker = 5; /* can't try inflateSync */
429 break;
430 }
431 if (((z->state->sub.method << 8) + b) % 31)
432 {
433 z->state->mode = BAD;
434 z->msg = "incorrect header check";
435 z->state->sub.marker = 5; /* can't try inflateSync */
436 break;
437 }
438 Trace((stderr, "inflate: zlib header ok\n"));
439 z->state->mode = BLOCKS;
440 case BLOCKS:
441 r = inflate_blocks(z->state->blocks, z, r);
442 if (f == Z_PACKET_FLUSH && z->avail_in == 0 && z->avail_out != 0)
443 r = inflate_packet_flush(z->state->blocks);
444 if (r == Z_DATA_ERROR)
445 {
446 z->state->mode = BAD;
447 z->state->sub.marker = 0; /* can try inflateSync */
448 break;
449 }
450 if (r != Z_STREAM_END)
451 return r;
452 r = Z_OK;
453 inflate_blocks_reset(z->state->blocks, z, &z->state->sub.check.was);
454 if (z->state->nowrap)
455 {
456 z->state->mode = DONE;
457 break;
458 }
459 z->state->mode = CHECK4;
460 case CHECK4:
461 NEEDBYTE
462 z->state->sub.check.need = (uLong)NEXTBYTE << 24;
463 z->state->mode = CHECK3;
464 case CHECK3:
465 NEEDBYTE
466 z->state->sub.check.need += (uLong)NEXTBYTE << 16;
467 z->state->mode = CHECK2;
468 case CHECK2:
469 NEEDBYTE
470 z->state->sub.check.need += (uLong)NEXTBYTE << 8;
471 z->state->mode = CHECK1;
472 case CHECK1:
473 NEEDBYTE
474 z->state->sub.check.need += (uLong)NEXTBYTE;
475
476 if (z->state->sub.check.was != z->state->sub.check.need)
477 {
478 z->state->mode = BAD;
479 z->msg = "incorrect data check";
480 z->state->sub.marker = 5; /* can't try inflateSync */
481 break;
482 }
483 Trace((stderr, "inflate: zlib check ok\n"));
484 z->state->mode = DONE;
485 case DONE:
486 return Z_STREAM_END;
487 case BAD:
488 return Z_DATA_ERROR;
489 default:
490 return Z_STREAM_ERROR;
491 }
492
493 empty:
494 if (f != Z_PACKET_FLUSH)
495 return r;
496 z->state->mode = BAD;
497 z->state->sub.marker = 0; /* can try inflateSync */
498 return Z_DATA_ERROR;
499}
500
501/*
502 * This subroutine adds the data at next_in/avail_in to the output history
503 * without performing any output. The output buffer must be "caught up";
504 * i.e. no pending output (hence s->read equals s->write), and the state must
505 * be BLOCKS (i.e. we should be willing to see the start of a series of
506 * BLOCKS). On exit, the output will also be caught up, and the checksum
507 * will have been updated if need be.
508 */
509
510int inflateIncomp(z)
511z_stream *z;
512{
513 if (z->state->mode != BLOCKS)
514 return Z_DATA_ERROR;
515 return inflate_addhistory(z->state->blocks, z);
516}
517
518
519int inflateSync(z)
520z_stream *z;
521{
522 uInt n; /* number of bytes to look at */
523 Bytef *p; /* pointer to bytes */
524 uInt m; /* number of marker bytes found in a row */
525 uLong r, w; /* temporaries to save total_in and total_out */
526
527 /* set up */
528 if (z == Z_NULL || z->state == Z_NULL)
529 return Z_STREAM_ERROR;
530 if (z->state->mode != BAD)
531 {
532 z->state->mode = BAD;
533 z->state->sub.marker = 0;
534 }
535 if ((n = z->avail_in) == 0)
536 return Z_BUF_ERROR;
537 p = z->next_in;
538 m = z->state->sub.marker;
539
540 /* search */
541 while (n && m < 4)
542 {
543 if (*p == (Byte)(m < 2 ? 0 : 0xff))
544 m++;
545 else if (*p)
546 m = 0;
547 else
548 m = 4 - m;
549 p++, n--;
550 }
551
552 /* restore */
553 z->total_in += p - z->next_in;
554 z->next_in = p;
555 z->avail_in = n;
556 z->state->sub.marker = m;
557
558 /* return no joy or set up to restart on a new block */
559 if (m != 4)
560 return Z_DATA_ERROR;
561 r = z->total_in; w = z->total_out;
562 inflateReset(z);
563 z->total_in = r; z->total_out = w;
564 z->state->mode = BLOCKS;
565 return Z_OK;
566}
567
568#undef NEEDBYTE
569#undef NEXTBYTE
570
571/*+++++*/
572/* infutil.h -- types and macros common to blocks and codes
573 * Copyright (C) 1995 Mark Adler
574 * For conditions of distribution and use, see copyright notice in zlib.h
575 */
576
577/* WARNING: this file should *not* be used by applications. It is
578 part of the implementation of the compression library and is
579 subject to change. Applications should only use zlib.h.
580 */
581
582/* inflate blocks semi-private state */
583struct inflate_blocks_state {
584
585 /* mode */
586 enum {
587 TYPE, /* get type bits (3, including end bit) */
588 LENS, /* get lengths for stored */
589 STORED, /* processing stored block */
590 TABLE, /* get table lengths */
591 BTREE, /* get bit lengths tree for a dynamic block */
592 DTREE, /* get length, distance trees for a dynamic block */
593 CODES, /* processing fixed or dynamic block */
594 DRY, /* output remaining window bytes */
595 DONEB, /* finished last block, done */
596 BADB} /* got a data error--stuck here */
597 mode; /* current inflate_block mode */
598
599 /* mode dependent information */
600 union {
601 uInt left; /* if STORED, bytes left to copy */
602 struct {
603 uInt table; /* table lengths (14 bits) */
604 uInt index; /* index into blens (or border) */
605 uIntf *blens; /* bit lengths of codes */
606 uInt bb; /* bit length tree depth */
607 inflate_huft *tb; /* bit length decoding tree */
608 int nblens; /* # elements allocated at blens */
609 } trees; /* if DTREE, decoding info for trees */
610 struct {
611 inflate_huft *tl, *td; /* trees to free */
612 inflate_codes_statef
613 *codes;
614 } decode; /* if CODES, current state */
615 } sub; /* submode */
616 uInt last; /* true if this block is the last block */
617
618 /* mode independent information */
619 uInt bitk; /* bits in bit buffer */
620 uLong bitb; /* bit buffer */
621 Bytef *window; /* sliding window */
622 Bytef *end; /* one byte after sliding window */
623 Bytef *read; /* window read pointer */
624 Bytef *write; /* window write pointer */
625 check_func checkfn; /* check function */
626 uLong check; /* check on output */
627
628};
629
630
631/* defines for inflate input/output */
632/* update pointers and return */
633#define UPDBITS {s->bitb=b;s->bitk=k;}
634#define UPDIN {z->avail_in=n;z->total_in+=p-z->next_in;z->next_in=p;}
635#define UPDOUT {s->write=q;}
636#define UPDATE {UPDBITS UPDIN UPDOUT}
637#define LEAVE {UPDATE return inflate_flush(s,z,r);}
638/* get bytes and bits */
639#define LOADIN {p=z->next_in;n=z->avail_in;b=s->bitb;k=s->bitk;}
640#define NEEDBYTE {if(n)r=Z_OK;else LEAVE}
641#define NEXTBYTE (n--,*p++)
642#define NEEDBITS(j) {while(k<(j)){NEEDBYTE;b|=((uLong)NEXTBYTE)<<k;k+=8;}}
643#define DUMPBITS(j) {b>>=(j);k-=(j);}
644/* output bytes */
645#define WAVAIL (q<s->read?s->read-q-1:s->end-q)
646#define LOADOUT {q=s->write;m=WAVAIL;}
647#define WRAP {if(q==s->end&&s->read!=s->window){q=s->window;m=WAVAIL;}}
648#define FLUSH {UPDOUT r=inflate_flush(s,z,r); LOADOUT}
649#define NEEDOUT {if(m==0){WRAP if(m==0){FLUSH WRAP if(m==0) LEAVE}}r=Z_OK;}
650#define OUTBYTE(a) {*q++=(Byte)(a);m--;}
651/* load local pointers */
652#define LOAD {LOADIN LOADOUT}
653
654/*
655 * The IBM 150 firmware munges the data right after _etext[]. This
656 * protects it. -- Cort
657 */
658local uInt protect_mask[] = {0, 0, 0, 0, 0, 0, 0, 0, 0 ,0 ,0 ,0};
659/* And'ing with mask[n] masks the lower n bits */
660local uInt inflate_mask[] = {
661 0x0000,
662 0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff,
663 0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff
664};
665
666/* copy as much as possible from the sliding window to the output area */
667local int inflate_flush OF((
668 inflate_blocks_statef *,
669 z_stream *,
670 int));
671
672/*+++++*/
673/* inffast.h -- header to use inffast.c
674 * Copyright (C) 1995 Mark Adler
675 * For conditions of distribution and use, see copyright notice in zlib.h
676 */
677
678/* WARNING: this file should *not* be used by applications. It is
679 part of the implementation of the compression library and is
680 subject to change. Applications should only use zlib.h.
681 */
682
683local int inflate_fast OF((
684 uInt,
685 uInt,
686 inflate_huft *,
687 inflate_huft *,
688 inflate_blocks_statef *,
689 z_stream *));
690
691
692/*+++++*/
693/* infblock.c -- interpret and process block types to last block
694 * Copyright (C) 1995 Mark Adler
695 * For conditions of distribution and use, see copyright notice in zlib.h
696 */
697
698/* Table for deflate from PKZIP's appnote.txt. */
699local uInt border[] = { /* Order of the bit length code lengths */
700 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
701
702/*
703 Notes beyond the 1.93a appnote.txt:
704
705 1. Distance pointers never point before the beginning of the output
706 stream.
707 2. Distance pointers can point back across blocks, up to 32k away.
708 3. There is an implied maximum of 7 bits for the bit length table and
709 15 bits for the actual data.
710 4. If only one code exists, then it is encoded using one bit. (Zero
711 would be more efficient, but perhaps a little confusing.) If two
712 codes exist, they are coded using one bit each (0 and 1).
713 5. There is no way of sending zero distance codes--a dummy must be
714 sent if there are none. (History: a pre 2.0 version of PKZIP would
715 store blocks with no distance codes, but this was discovered to be
716 too harsh a criterion.) Valid only for 1.93a. 2.04c does allow
717 zero distance codes, which is sent as one code of zero bits in
718 length.
719 6. There are up to 286 literal/length codes. Code 256 represents the
720 end-of-block. Note however that the static length tree defines
721 288 codes just to fill out the Huffman codes. Codes 286 and 287
722 cannot be used though, since there is no length base or extra bits
723 defined for them. Similarily, there are up to 30 distance codes.
724 However, static trees define 32 codes (all 5 bits) to fill out the
725 Huffman codes, but the last two had better not show up in the data.
726 7. Unzip can check dynamic Huffman blocks for complete code sets.
727 The exception is that a single code would not be complete (see #4).
728 8. The five bits following the block type is really the number of
729 literal codes sent minus 257.
730 9. Length codes 8,16,16 are interpreted as 13 length codes of 8 bits
731 (1+6+6). Therefore, to output three times the length, you output
732 three codes (1+1+1), whereas to output four times the same length,
733 you only need two codes (1+3). Hmm.
734 10. In the tree reconstruction algorithm, Code = Code + Increment
735 only if BitLength(i) is not zero. (Pretty obvious.)
736 11. Correction: 4 Bits: # of Bit Length codes - 4 (4 - 19)
737 12. Note: length code 284 can represent 227-258, but length code 285
738 really is 258. The last length deserves its own, short code
739 since it gets used a lot in very redundant files. The length
740 258 is special since 258 - 3 (the min match length) is 255.
741 13. The literal/length and distance code bit lengths are read as a
742 single stream of lengths. It is possible (and advantageous) for
743 a repeat code (16, 17, or 18) to go across the boundary between
744 the two sets of lengths.
745 */
746
747
748local void inflate_blocks_reset(s, z, c)
749inflate_blocks_statef *s;
750z_stream *z;
751uLongf *c;
752{
753 if (s->checkfn != Z_NULL)
754 *c = s->check;
755 if (s->mode == BTREE || s->mode == DTREE)
756 ZFREE(z, s->sub.trees.blens, s->sub.trees.nblens * sizeof(uInt));
757 if (s->mode == CODES)
758 {
759 inflate_codes_free(s->sub.decode.codes, z);
760 inflate_trees_free(s->sub.decode.td, z);
761 inflate_trees_free(s->sub.decode.tl, z);
762 }
763 s->mode = TYPE;
764 s->bitk = 0;
765 s->bitb = 0;
766 s->read = s->write = s->window;
767 if (s->checkfn != Z_NULL)
768 s->check = (*s->checkfn)(0L, Z_NULL, 0);
769 Trace((stderr, "inflate: blocks reset\n"));
770}
771
772
773local inflate_blocks_statef *inflate_blocks_new(z, c, w)
774z_stream *z;
775check_func c;
776uInt w;
777{
778 inflate_blocks_statef *s;
779
780 if ((s = (inflate_blocks_statef *)ZALLOC
781 (z,1,sizeof(struct inflate_blocks_state))) == Z_NULL)
782 return s;
783 if ((s->window = (Bytef *)ZALLOC(z, 1, w)) == Z_NULL)
784 {
785 ZFREE(z, s, sizeof(struct inflate_blocks_state));
786 return Z_NULL;
787 }
788 s->end = s->window + w;
789 s->checkfn = c;
790 s->mode = TYPE;
791 Trace((stderr, "inflate: blocks allocated\n"));
792 inflate_blocks_reset(s, z, &s->check);
793 return s;
794}
795
796
797local int inflate_blocks(s, z, r)
798inflate_blocks_statef *s;
799z_stream *z;
800int r;
801{
802 uInt t; /* temporary storage */
803 uLong b; /* bit buffer */
804 uInt k; /* bits in bit buffer */
805 Bytef *p; /* input data pointer */
806 uInt n; /* bytes available there */
807 Bytef *q; /* output window write pointer */
808 uInt m; /* bytes to end of window or read pointer */
809
810 /* copy input/output information to locals (UPDATE macro restores) */
811 LOAD
812
813 /* process input based on current state */
814 while (1) switch (s->mode)
815 {
816 case TYPE:
817 NEEDBITS(3)
818 t = (uInt)b & 7;
819 s->last = t & 1;
820 switch (t >> 1)
821 {
822 case 0: /* stored */
823 Trace((stderr, "inflate: stored block%s\n",
824 s->last ? " (last)" : ""));
825 DUMPBITS(3)
826 t = k & 7; /* go to byte boundary */
827 DUMPBITS(t)
828 s->mode = LENS; /* get length of stored block */
829 break;
830 case 1: /* fixed */
831 Trace((stderr, "inflate: fixed codes block%s\n",
832 s->last ? " (last)" : ""));
833 {
834 uInt bl, bd;
835 inflate_huft *tl, *td;
836
837 inflate_trees_fixed(&bl, &bd, &tl, &td);
838 s->sub.decode.codes = inflate_codes_new(bl, bd, tl, td, z);
839 if (s->sub.decode.codes == Z_NULL)
840 {
841 r = Z_MEM_ERROR;
842 LEAVE
843 }
844 s->sub.decode.tl = Z_NULL; /* don't try to free these */
845 s->sub.decode.td = Z_NULL;
846 }
847 DUMPBITS(3)
848 s->mode = CODES;
849 break;
850 case 2: /* dynamic */
851 Trace((stderr, "inflate: dynamic codes block%s\n",
852 s->last ? " (last)" : ""));
853 DUMPBITS(3)
854 s->mode = TABLE;
855 break;
856 case 3: /* illegal */
857 DUMPBITS(3)
858 s->mode = BADB;
859 z->msg = "invalid block type";
860 r = Z_DATA_ERROR;
861 LEAVE
862 }
863 break;
864 case LENS:
865 NEEDBITS(32)
866 if (((~b) >> 16) != (b & 0xffff))
867 {
868 s->mode = BADB;
869 z->msg = "invalid stored block lengths";
870 r = Z_DATA_ERROR;
871 LEAVE
872 }
873 s->sub.left = (uInt)b & 0xffff;
874 b = k = 0; /* dump bits */
875 Tracev((stderr, "inflate: stored length %u\n", s->sub.left));
876 s->mode = s->sub.left ? STORED : TYPE;
877 break;
878 case STORED:
879 if (n == 0)
880 LEAVE
881 NEEDOUT
882 t = s->sub.left;
883 if (t > n) t = n;
884 if (t > m) t = m;
885 zmemcpy(q, p, t);
886 p += t; n -= t;
887 q += t; m -= t;
888 if ((s->sub.left -= t) != 0)
889 break;
890 Tracev((stderr, "inflate: stored end, %lu total out\n",
891 z->total_out + (q >= s->read ? q - s->read :
892 (s->end - s->read) + (q - s->window))));
893 s->mode = s->last ? DRY : TYPE;
894 break;
895 case TABLE:
896 NEEDBITS(14)
897 s->sub.trees.table = t = (uInt)b & 0x3fff;
898#ifndef PKZIP_BUG_WORKAROUND
899 if ((t & 0x1f) > 29 || ((t >> 5) & 0x1f) > 29)
900 {
901 s->mode = BADB;
902 z->msg = "too many length or distance symbols";
903 r = Z_DATA_ERROR;
904 LEAVE
905 }
906#endif
907 t = 258 + (t & 0x1f) + ((t >> 5) & 0x1f);
908 if (t < 19)
909 t = 19;
910 if ((s->sub.trees.blens = (uIntf*)ZALLOC(z, t, sizeof(uInt))) == Z_NULL)
911 {
912 r = Z_MEM_ERROR;
913 LEAVE
914 }
915 s->sub.trees.nblens = t;
916 DUMPBITS(14)
917 s->sub.trees.index = 0;
918 Tracev((stderr, "inflate: table sizes ok\n"));
919 s->mode = BTREE;
920 case BTREE:
921 while (s->sub.trees.index < 4 + (s->sub.trees.table >> 10))
922 {
923 NEEDBITS(3)
924 s->sub.trees.blens[border[s->sub.trees.index++]] = (uInt)b & 7;
925 DUMPBITS(3)
926 }
927 while (s->sub.trees.index < 19)
928 s->sub.trees.blens[border[s->sub.trees.index++]] = 0;
929 s->sub.trees.bb = 7;
930 t = inflate_trees_bits(s->sub.trees.blens, &s->sub.trees.bb,
931 &s->sub.trees.tb, z);
932 if (t != Z_OK)
933 {
934 r = t;
935 if (r == Z_DATA_ERROR)
936 s->mode = BADB;
937 LEAVE
938 }
939 s->sub.trees.index = 0;
940 Tracev((stderr, "inflate: bits tree ok\n"));
941 s->mode = DTREE;
942 case DTREE:
943 while (t = s->sub.trees.table,
944 s->sub.trees.index < 258 + (t & 0x1f) + ((t >> 5) & 0x1f))
945 {
946 inflate_huft *h;
947 uInt i, j, c;
948
949 t = s->sub.trees.bb;
950 NEEDBITS(t)
951 h = s->sub.trees.tb + ((uInt)b & inflate_mask[t]);
952 t = h->word.what.Bits;
953 c = h->more.Base;
954 if (c < 16)
955 {
956 DUMPBITS(t)
957 s->sub.trees.blens[s->sub.trees.index++] = c;
958 }
959 else /* c == 16..18 */
960 {
961 i = c == 18 ? 7 : c - 14;
962 j = c == 18 ? 11 : 3;
963 NEEDBITS(t + i)
964 DUMPBITS(t)
965 j += (uInt)b & inflate_mask[i];
966 DUMPBITS(i)
967 i = s->sub.trees.index;
968 t = s->sub.trees.table;
969 if (i + j > 258 + (t & 0x1f) + ((t >> 5) & 0x1f) ||
970 (c == 16 && i < 1))
971 {
972 s->mode = BADB;
973 z->msg = "invalid bit length repeat";
974 r = Z_DATA_ERROR;
975 LEAVE
976 }
977 c = c == 16 ? s->sub.trees.blens[i - 1] : 0;
978 do {
979 s->sub.trees.blens[i++] = c;
980 } while (--j);
981 s->sub.trees.index = i;
982 }
983 }
984 inflate_trees_free(s->sub.trees.tb, z);
985 s->sub.trees.tb = Z_NULL;
986 {
987 uInt bl, bd;
988 inflate_huft *tl, *td;
989 inflate_codes_statef *c;
990
991 bl = 9; /* must be <= 9 for lookahead assumptions */
992 bd = 6; /* must be <= 9 for lookahead assumptions */
993 t = s->sub.trees.table;
994 t = inflate_trees_dynamic(257 + (t & 0x1f), 1 + ((t >> 5) & 0x1f),
995 s->sub.trees.blens, &bl, &bd, &tl, &td, z);
996 if (t != Z_OK)
997 {
998 if (t == (uInt)Z_DATA_ERROR)
999 s->mode = BADB;
1000 r = t;
1001 LEAVE
1002 }
1003 Tracev((stderr, "inflate: trees ok\n"));
1004 if ((c = inflate_codes_new(bl, bd, tl, td, z)) == Z_NULL)
1005 {
1006 inflate_trees_free(td, z);
1007 inflate_trees_free(tl, z);
1008 r = Z_MEM_ERROR;
1009 LEAVE
1010 }
1011 ZFREE(z, s->sub.trees.blens, s->sub.trees.nblens * sizeof(uInt));
1012 s->sub.decode.codes = c;
1013 s->sub.decode.tl = tl;
1014 s->sub.decode.td = td;
1015 }
1016 s->mode = CODES;
1017 case CODES:
1018 UPDATE
1019 if ((r = inflate_codes(s, z, r)) != Z_STREAM_END)
1020 return inflate_flush(s, z, r);
1021 r = Z_OK;
1022 inflate_codes_free(s->sub.decode.codes, z);
1023 inflate_trees_free(s->sub.decode.td, z);
1024 inflate_trees_free(s->sub.decode.tl, z);
1025 LOAD
1026 Tracev((stderr, "inflate: codes end, %lu total out\n",
1027 z->total_out + (q >= s->read ? q - s->read :
1028 (s->end - s->read) + (q - s->window))));
1029 if (!s->last)
1030 {
1031 s->mode = TYPE;
1032 break;
1033 }
1034 if (k > 7) /* return unused byte, if any */
1035 {
1036 Assert(k < 16, "inflate_codes grabbed too many bytes")
1037 k -= 8;
1038 n++;
1039 p--; /* can always return one */
1040 }
1041 s->mode = DRY;
1042 case DRY:
1043 FLUSH
1044 if (s->read != s->write)
1045 LEAVE
1046 s->mode = DONEB;
1047 case DONEB:
1048 r = Z_STREAM_END;
1049 LEAVE
1050 case BADB:
1051 r = Z_DATA_ERROR;
1052 LEAVE
1053 default:
1054 r = Z_STREAM_ERROR;
1055 LEAVE
1056 }
1057}
1058
1059
1060local int inflate_blocks_free(s, z, c)
1061inflate_blocks_statef *s;
1062z_stream *z;
1063uLongf *c;
1064{
1065 inflate_blocks_reset(s, z, c);
1066 ZFREE(z, s->window, s->end - s->window);
1067 ZFREE(z, s, sizeof(struct inflate_blocks_state));
1068 Trace((stderr, "inflate: blocks freed\n"));
1069 return Z_OK;
1070}
1071
1072/*
1073 * This subroutine adds the data at next_in/avail_in to the output history
1074 * without performing any output. The output buffer must be "caught up";
1075 * i.e. no pending output (hence s->read equals s->write), and the state must
1076 * be BLOCKS (i.e. we should be willing to see the start of a series of
1077 * BLOCKS). On exit, the output will also be caught up, and the checksum
1078 * will have been updated if need be.
1079 */
1080local int inflate_addhistory(s, z)
1081inflate_blocks_statef *s;
1082z_stream *z;
1083{
1084 uLong b; /* bit buffer */ /* NOT USED HERE */
1085 uInt k; /* bits in bit buffer */ /* NOT USED HERE */
1086 uInt t; /* temporary storage */
1087 Bytef *p; /* input data pointer */
1088 uInt n; /* bytes available there */
1089 Bytef *q; /* output window write pointer */
1090 uInt m; /* bytes to end of window or read pointer */
1091
1092 if (s->read != s->write)
1093 return Z_STREAM_ERROR;
1094 if (s->mode != TYPE)
1095 return Z_DATA_ERROR;
1096
1097 /* we're ready to rock */
1098 LOAD
1099 /* while there is input ready, copy to output buffer, moving
1100 * pointers as needed.
1101 */
1102 while (n) {
1103 t = n; /* how many to do */
1104 /* is there room until end of buffer? */
1105 if (t > m) t = m;
1106 /* update check information */
1107 if (s->checkfn != Z_NULL)
1108 s->check = (*s->checkfn)(s->check, q, t);
1109 zmemcpy(q, p, t);
1110 q += t;
1111 p += t;
1112 n -= t;
1113 z->total_out += t;
1114 s->read = q; /* drag read pointer forward */
1115/* WRAP */ /* expand WRAP macro by hand to handle s->read */
1116 if (q == s->end) {
1117 s->read = q = s->window;
1118 m = WAVAIL;
1119 }
1120 }
1121 UPDATE
1122 return Z_OK;
1123}
1124
1125
1126/*
1127 * At the end of a Deflate-compressed PPP packet, we expect to have seen
1128 * a `stored' block type value but not the (zero) length bytes.
1129 */
1130local int inflate_packet_flush(s)
1131 inflate_blocks_statef *s;
1132{
1133 if (s->mode != LENS)
1134 return Z_DATA_ERROR;
1135 s->mode = TYPE;
1136 return Z_OK;
1137}
1138
1139
1140/*+++++*/
1141/* inftrees.c -- generate Huffman trees for efficient decoding
1142 * Copyright (C) 1995 Mark Adler
1143 * For conditions of distribution and use, see copyright notice in zlib.h
1144 */
1145
1146/* simplify the use of the inflate_huft type with some defines */
1147#define base more.Base
1148#define next more.Next
1149#define exop word.what.Exop
1150#define bits word.what.Bits
1151
1152
1153local int huft_build OF((
1154 uIntf *, /* code lengths in bits */
1155 uInt, /* number of codes */
1156 uInt, /* number of "simple" codes */
1157 uIntf *, /* list of base values for non-simple codes */
1158 uIntf *, /* list of extra bits for non-simple codes */
1159 inflate_huft * FAR*,/* result: starting table */
1160 uIntf *, /* maximum lookup bits (returns actual) */
1161 z_stream *)); /* for zalloc function */
1162
1163local voidpf falloc OF((
1164 voidpf, /* opaque pointer (not used) */
1165 uInt, /* number of items */
1166 uInt)); /* size of item */
1167
1168local void ffree OF((
1169 voidpf q, /* opaque pointer (not used) */
1170 voidpf p, /* what to free (not used) */
1171 uInt n)); /* number of bytes (not used) */
1172
1173/* Tables for deflate from PKZIP's appnote.txt. */
1174local uInt cplens[] = { /* Copy lengths for literal codes 257..285 */
1175 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
1176 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
1177 /* actually lengths - 2; also see note #13 above about 258 */
1178local uInt cplext[] = { /* Extra bits for literal codes 257..285 */
1179 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2,
1180 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 192, 192}; /* 192==invalid */
1181local uInt cpdist[] = { /* Copy offsets for distance codes 0..29 */
1182 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
1183 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
1184 8193, 12289, 16385, 24577};
1185local uInt cpdext[] = { /* Extra bits for distance codes */
1186 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
1187 7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
1188 12, 12, 13, 13};
1189
1190/*
1191 Huffman code decoding is performed using a multi-level table lookup.
1192 The fastest way to decode is to simply build a lookup table whose
1193 size is determined by the longest code. However, the time it takes
1194 to build this table can also be a factor if the data being decoded
1195 is not very long. The most common codes are necessarily the
1196 shortest codes, so those codes dominate the decoding time, and hence
1197 the speed. The idea is you can have a shorter table that decodes the
1198 shorter, more probable codes, and then point to subsidiary tables for
1199 the longer codes. The time it costs to decode the longer codes is
1200 then traded against the time it takes to make longer tables.
1201
1202 This results of this trade are in the variables lbits and dbits
1203 below. lbits is the number of bits the first level table for literal/
1204 length codes can decode in one step, and dbits is the same thing for
1205 the distance codes. Subsequent tables are also less than or equal to
1206 those sizes. These values may be adjusted either when all of the
1207 codes are shorter than that, in which case the longest code length in
1208 bits is used, or when the shortest code is *longer* than the requested
1209 table size, in which case the length of the shortest code in bits is
1210 used.
1211
1212 There are two different values for the two tables, since they code a
1213 different number of possibilities each. The literal/length table
1214 codes 286 possible values, or in a flat code, a little over eight
1215 bits. The distance table codes 30 possible values, or a little less
1216 than five bits, flat. The optimum values for speed end up being
1217 about one bit more than those, so lbits is 8+1 and dbits is 5+1.
1218 The optimum values may differ though from machine to machine, and
1219 possibly even between compilers. Your mileage may vary.
1220 */
1221
1222
1223/* If BMAX needs to be larger than 16, then h and x[] should be uLong. */
1224#define BMAX 15 /* maximum bit length of any code */
1225#define N_MAX 288 /* maximum number of codes in any set */
1226
1227#ifdef DEBUG_ZLIB
1228 uInt inflate_hufts;
1229#endif
1230
1231local int huft_build(b, n, s, d, e, t, m, zs)
1232uIntf *b; /* code lengths in bits (all assumed <= BMAX) */
1233uInt n; /* number of codes (assumed <= N_MAX) */
1234uInt s; /* number of simple-valued codes (0..s-1) */
1235uIntf *d; /* list of base values for non-simple codes */
1236uIntf *e; /* list of extra bits for non-simple codes */
1237inflate_huft * FAR *t; /* result: starting table */
1238uIntf *m; /* maximum lookup bits, returns actual */
1239z_stream *zs; /* for zalloc function */
1240/* Given a list of code lengths and a maximum table size, make a set of
1241 tables to decode that set of codes. Return Z_OK on success, Z_BUF_ERROR
1242 if the given code set is incomplete (the tables are still built in this
1243 case), Z_DATA_ERROR if the input is invalid (all zero length codes or an
1244 over-subscribed set of lengths), or Z_MEM_ERROR if not enough memory. */
1245{
1246
1247 uInt a; /* counter for codes of length k */
1248 uInt c[BMAX+1]; /* bit length count table */
1249 uInt f; /* i repeats in table every f entries */
1250 int g; /* maximum code length */
1251 int h; /* table level */
1252 register uInt i; /* counter, current code */
1253 register uInt j; /* counter */
1254 register int k; /* number of bits in current code */
1255 int l; /* bits per table (returned in m) */
1256 register uIntf *p; /* pointer into c[], b[], or v[] */
1257 inflate_huft *q; /* points to current table */
1258 struct inflate_huft_s r; /* table entry for structure assignment */
1259 inflate_huft *u[BMAX]; /* table stack */
1260 uInt v[N_MAX]; /* values in order of bit length */
1261 register int w; /* bits before this table == (l * h) */
1262 uInt x[BMAX+1]; /* bit offsets, then code stack */
1263 uIntf *xp; /* pointer into x */
1264 int y; /* number of dummy codes added */
1265 uInt z; /* number of entries in current table */
1266
1267
1268 /* Generate counts for each bit length */
1269 p = c;
1270#define C0 *p++ = 0;
1271#define C2 C0 C0 C0 C0
1272#define C4 C2 C2 C2 C2
1273 C4 /* clear c[]--assume BMAX+1 is 16 */
1274 p = b; i = n;
1275 do {
1276 c[*p++]++; /* assume all entries <= BMAX */
1277 } while (--i);
1278 if (c[0] == n) /* null input--all zero length codes */
1279 {
1280 *t = (inflate_huft *)Z_NULL;
1281 *m = 0;
1282 return Z_OK;
1283 }
1284
1285
1286 /* Find minimum and maximum length, bound *m by those */
1287 l = *m;
1288 for (j = 1; j <= BMAX; j++)
1289 if (c[j])
1290 break;
1291 k = j; /* minimum code length */
1292 if ((uInt)l < j)
1293 l = j;
1294 for (i = BMAX; i; i--)
1295 if (c[i])
1296 break;
1297 g = i; /* maximum code length */
1298 if ((uInt)l > i)
1299 l = i;
1300 *m = l;
1301
1302
1303 /* Adjust last length count to fill out codes, if needed */
1304 for (y = 1 << j; j < i; j++, y <<= 1)
1305 if ((y -= c[j]) < 0)
1306 return Z_DATA_ERROR;
1307 if ((y -= c[i]) < 0)
1308 return Z_DATA_ERROR;
1309 c[i] += y;
1310
1311
1312 /* Generate starting offsets into the value table for each length */
1313 x[1] = j = 0;
1314 p = c + 1; xp = x + 2;
1315 while (--i) { /* note that i == g from above */
1316 *xp++ = (j += *p++);
1317 }
1318
1319
1320 /* Make a table of values in order of bit lengths */
1321 p = b; i = 0;
1322 do {
1323 if ((j = *p++) != 0)
1324 v[x[j]++] = i;
1325 } while (++i < n);
1326
1327
1328 /* Generate the Huffman codes and for each, make the table entries */
1329 x[0] = i = 0; /* first Huffman code is zero */
1330 p = v; /* grab values in bit order */
1331 h = -1; /* no tables yet--level -1 */
1332 w = -l; /* bits decoded == (l * h) */
1333 u[0] = (inflate_huft *)Z_NULL; /* just to keep compilers happy */
1334 q = (inflate_huft *)Z_NULL; /* ditto */
1335 z = 0; /* ditto */
1336
1337 /* go through the bit lengths (k already is bits in shortest code) */
1338 for (; k <= g; k++)
1339 {
1340 a = c[k];
1341 while (a--)
1342 {
1343 /* here i is the Huffman code of length k bits for value *p */
1344 /* make tables up to required level */
1345 while (k > w + l)
1346 {
1347 h++;
1348 w += l; /* previous table always l bits */
1349
1350 /* compute minimum size table less than or equal to l bits */
1351 z = (z = g - w) > (uInt)l ? l : z; /* table size upper limit */
1352 if ((f = 1 << (j = k - w)) > a + 1) /* try a k-w bit table */
1353 { /* too few codes for k-w bit table */
1354 f -= a + 1; /* deduct codes from patterns left */
1355 xp = c + k;
1356 if (j < z)
1357 while (++j < z) /* try smaller tables up to z bits */
1358 {
1359 if ((f <<= 1) <= *++xp)
1360 break; /* enough codes to use up j bits */
1361 f -= *xp; /* else deduct codes from patterns */
1362 }
1363 }
1364 z = 1 << j; /* table entries for j-bit table */
1365
1366 /* allocate and link in new table */
1367 if ((q = (inflate_huft *)ZALLOC
1368 (zs,z + 1,sizeof(inflate_huft))) == Z_NULL)
1369 {
1370 if (h)
1371 inflate_trees_free(u[0], zs);
1372 return Z_MEM_ERROR; /* not enough memory */
1373 }
1374 q->word.Nalloc = z + 1;
1375#ifdef DEBUG_ZLIB
1376 inflate_hufts += z + 1;
1377#endif
1378 *t = q + 1; /* link to list for huft_free() */
1379 *(t = &(q->next)) = Z_NULL;
1380 u[h] = ++q; /* table starts after link */
1381
1382 /* connect to last table, if there is one */
1383 if (h)
1384 {
1385 x[h] = i; /* save pattern for backing up */
1386 r.bits = (Byte)l; /* bits to dump before this table */
1387 r.exop = (Byte)j; /* bits in this table */
1388 r.next = q; /* pointer to this table */
1389 j = i >> (w - l); /* (get around Turbo C bug) */
1390 u[h-1][j] = r; /* connect to last table */
1391 }
1392 }
1393
1394 /* set up table entry in r */
1395 r.bits = (Byte)(k - w);
1396 if (p >= v + n)
1397 r.exop = 128 + 64; /* out of values--invalid code */
1398 else if (*p < s)
1399 {
1400 r.exop = (Byte)(*p < 256 ? 0 : 32 + 64); /* 256 is end-of-block */
1401 r.base = *p++; /* simple code is just the value */
1402 }
1403 else
1404 {
1405 r.exop = (Byte)e[*p - s] + 16 + 64; /* non-simple--look up in lists */
1406 r.base = d[*p++ - s];
1407 }
1408
1409 /* fill code-like entries with r */
1410 f = 1 << (k - w);
1411 for (j = i >> w; j < z; j += f)
1412 q[j] = r;
1413
1414 /* backwards increment the k-bit code i */
1415 for (j = 1 << (k - 1); i & j; j >>= 1)
1416 i ^= j;
1417 i ^= j;
1418
1419 /* backup over finished tables */
1420 while ((i & ((1 << w) - 1)) != x[h])
1421 {
1422 h--; /* don't need to update q */
1423 w -= l;
1424 }
1425 }
1426 }
1427
1428
1429 /* Return Z_BUF_ERROR if we were given an incomplete table */
1430 return y != 0 && g != 1 ? Z_BUF_ERROR : Z_OK;
1431}
1432
1433
1434local int inflate_trees_bits(c, bb, tb, z)
1435uIntf *c; /* 19 code lengths */
1436uIntf *bb; /* bits tree desired/actual depth */
1437inflate_huft * FAR *tb; /* bits tree result */
1438z_stream *z; /* for zfree function */
1439{
1440 int r;
1441
1442 r = huft_build(c, 19, 19, (uIntf*)Z_NULL, (uIntf*)Z_NULL, tb, bb, z);
1443 if (r == Z_DATA_ERROR)
1444 z->msg = "oversubscribed dynamic bit lengths tree";
1445 else if (r == Z_BUF_ERROR)
1446 {
1447 inflate_trees_free(*tb, z);
1448 z->msg = "incomplete dynamic bit lengths tree";
1449 r = Z_DATA_ERROR;
1450 }
1451 return r;
1452}
1453
1454
1455local int inflate_trees_dynamic(nl, nd, c, bl, bd, tl, td, z)
1456uInt nl; /* number of literal/length codes */
1457uInt nd; /* number of distance codes */
1458uIntf *c; /* that many (total) code lengths */
1459uIntf *bl; /* literal desired/actual bit depth */
1460uIntf *bd; /* distance desired/actual bit depth */
1461inflate_huft * FAR *tl; /* literal/length tree result */
1462inflate_huft * FAR *td; /* distance tree result */
1463z_stream *z; /* for zfree function */
1464{
1465 int r;
1466
1467 /* build literal/length tree */
1468 if ((r = huft_build(c, nl, 257, cplens, cplext, tl, bl, z)) != Z_OK)
1469 {
1470 if (r == Z_DATA_ERROR)
1471 z->msg = "oversubscribed literal/length tree";
1472 else if (r == Z_BUF_ERROR)
1473 {
1474 inflate_trees_free(*tl, z);
1475 z->msg = "incomplete literal/length tree";
1476 r = Z_DATA_ERROR;
1477 }
1478 return r;
1479 }
1480
1481 /* build distance tree */
1482 if ((r = huft_build(c + nl, nd, 0, cpdist, cpdext, td, bd, z)) != Z_OK)
1483 {
1484 if (r == Z_DATA_ERROR)
1485 z->msg = "oversubscribed literal/length tree";
1486 else if (r == Z_BUF_ERROR) {
1487#ifdef PKZIP_BUG_WORKAROUND
1488 r = Z_OK;
1489 }
1490#else
1491 inflate_trees_free(*td, z);
1492 z->msg = "incomplete literal/length tree";
1493 r = Z_DATA_ERROR;
1494 }
1495 inflate_trees_free(*tl, z);
1496 return r;
1497#endif
1498 }
1499
1500 /* done */
1501 return Z_OK;
1502}
1503
1504
1505/* build fixed tables only once--keep them here */
1506local int fixed_lock = 0;
1507local int fixed_built = 0;
1508#define FIXEDH 530 /* number of hufts used by fixed tables */
1509local uInt fixed_left = FIXEDH;
1510local inflate_huft fixed_mem[FIXEDH];
1511local uInt fixed_bl;
1512local uInt fixed_bd;
1513local inflate_huft *fixed_tl;
1514local inflate_huft *fixed_td;
1515
1516
1517local voidpf falloc(q, n, s)
1518voidpf q; /* opaque pointer (not used) */
1519uInt n; /* number of items */
1520uInt s; /* size of item */
1521{
1522 Assert(s == sizeof(inflate_huft) && n <= fixed_left,
1523 "inflate_trees falloc overflow");
1524 if (q) s++; /* to make some compilers happy */
1525 fixed_left -= n;
1526 return (voidpf)(fixed_mem + fixed_left);
1527}
1528
1529
1530local void ffree(q, p, n)
1531voidpf q;
1532voidpf p;
1533uInt n;
1534{
1535 Assert(0, "inflate_trees ffree called!");
1536 if (q) q = p; /* to make some compilers happy */
1537}
1538
1539
1540local int inflate_trees_fixed(bl, bd, tl, td)
1541uIntf *bl; /* literal desired/actual bit depth */
1542uIntf *bd; /* distance desired/actual bit depth */
1543inflate_huft * FAR *tl; /* literal/length tree result */
1544inflate_huft * FAR *td; /* distance tree result */
1545{
1546 /* build fixed tables if not built already--lock out other instances */
1547 while (++fixed_lock > 1)
1548 fixed_lock--;
1549 if (!fixed_built)
1550 {
1551 int k; /* temporary variable */
1552 unsigned c[288]; /* length list for huft_build */
1553 z_stream z; /* for falloc function */
1554
1555 /* set up fake z_stream for memory routines */
1556 z.zalloc = falloc;
1557 z.zfree = ffree;
1558 z.opaque = Z_NULL;
1559
1560 /* literal table */
1561 for (k = 0; k < 144; k++)
1562 c[k] = 8;
1563 for (; k < 256; k++)
1564 c[k] = 9;
1565 for (; k < 280; k++)
1566 c[k] = 7;
1567 for (; k < 288; k++)
1568 c[k] = 8;
1569 fixed_bl = 7;
1570 huft_build(c, 288, 257, cplens, cplext, &fixed_tl, &fixed_bl, &z);
1571
1572 /* distance table */
1573 for (k = 0; k < 30; k++)
1574 c[k] = 5;
1575 fixed_bd = 5;
1576 huft_build(c, 30, 0, cpdist, cpdext, &fixed_td, &fixed_bd, &z);
1577
1578 /* done */
1579 fixed_built = 1;
1580 }
1581 fixed_lock--;
1582 *bl = fixed_bl;
1583 *bd = fixed_bd;
1584 *tl = fixed_tl;
1585 *td = fixed_td;
1586 return Z_OK;
1587}
1588
1589
1590local int inflate_trees_free(t, z)
1591inflate_huft *t; /* table to free */
1592z_stream *z; /* for zfree function */
1593/* Free the malloc'ed tables built by huft_build(), which makes a linked
1594 list of the tables it made, with the links in a dummy first entry of
1595 each table. */
1596{
1597 register inflate_huft *p, *q;
1598
1599 /* Go through linked list, freeing from the malloced (t[-1]) address. */
1600 p = t;
1601 while (p != Z_NULL)
1602 {
1603 q = (--p)->next;
1604 ZFREE(z, p, p->word.Nalloc * sizeof(inflate_huft));
1605 p = q;
1606 }
1607 return Z_OK;
1608}
1609
1610/*+++++*/
1611/* infcodes.c -- process literals and length/distance pairs
1612 * Copyright (C) 1995 Mark Adler
1613 * For conditions of distribution and use, see copyright notice in zlib.h
1614 */
1615
1616/* simplify the use of the inflate_huft type with some defines */
1617#define base more.Base
1618#define next more.Next
1619#define exop word.what.Exop
1620#define bits word.what.Bits
1621
1622/* inflate codes private state */
1623struct inflate_codes_state {
1624
1625 /* mode */
1626 enum { /* waiting for "i:"=input, "o:"=output, "x:"=nothing */
1627 START, /* x: set up for LEN */
1628 LEN, /* i: get length/literal/eob next */
1629 LENEXT, /* i: getting length extra (have base) */
1630 DIST, /* i: get distance next */
1631 DISTEXT, /* i: getting distance extra */
1632 COPY, /* o: copying bytes in window, waiting for space */
1633 LIT, /* o: got literal, waiting for output space */
1634 WASH, /* o: got eob, possibly still output waiting */
1635 END, /* x: got eob and all data flushed */
1636 BADCODE} /* x: got error */
1637 mode; /* current inflate_codes mode */
1638
1639 /* mode dependent information */
1640 uInt len;
1641 union {
1642 struct {
1643 inflate_huft *tree; /* pointer into tree */
1644 uInt need; /* bits needed */
1645 } code; /* if LEN or DIST, where in tree */
1646 uInt lit; /* if LIT, literal */
1647 struct {
1648 uInt get; /* bits to get for extra */
1649 uInt dist; /* distance back to copy from */
1650 } copy; /* if EXT or COPY, where and how much */
1651 } sub; /* submode */
1652
1653 /* mode independent information */
1654 Byte lbits; /* ltree bits decoded per branch */
1655 Byte dbits; /* dtree bits decoder per branch */
1656 inflate_huft *ltree; /* literal/length/eob tree */
1657 inflate_huft *dtree; /* distance tree */
1658
1659};
1660
1661
1662local inflate_codes_statef *inflate_codes_new(bl, bd, tl, td, z)
1663uInt bl, bd;
1664inflate_huft *tl, *td;
1665z_stream *z;
1666{
1667 inflate_codes_statef *c;
1668
1669 if ((c = (inflate_codes_statef *)
1670 ZALLOC(z,1,sizeof(struct inflate_codes_state))) != Z_NULL)
1671 {
1672 c->mode = START;
1673 c->lbits = (Byte)bl;
1674 c->dbits = (Byte)bd;
1675 c->ltree = tl;
1676 c->dtree = td;
1677 Tracev((stderr, "inflate: codes new\n"));
1678 }
1679 return c;
1680}
1681
1682
1683local int inflate_codes(s, z, r)
1684inflate_blocks_statef *s;
1685z_stream *z;
1686int r;
1687{
1688 uInt j; /* temporary storage */
1689 inflate_huft *t; /* temporary pointer */
1690 uInt e; /* extra bits or operation */
1691 uLong b; /* bit buffer */
1692 uInt k; /* bits in bit buffer */
1693 Bytef *p; /* input data pointer */
1694 uInt n; /* bytes available there */
1695 Bytef *q; /* output window write pointer */
1696 uInt m; /* bytes to end of window or read pointer */
1697 Bytef *f; /* pointer to copy strings from */
1698 inflate_codes_statef *c = s->sub.decode.codes; /* codes state */
1699
1700 /* copy input/output information to locals (UPDATE macro restores) */
1701 LOAD
1702
1703 /* process input and output based on current state */
1704 while (1) switch (c->mode)
1705 { /* waiting for "i:"=input, "o:"=output, "x:"=nothing */
1706 case START: /* x: set up for LEN */
1707#ifndef SLOW
1708 if (m >= 258 && n >= 10)
1709 {
1710 UPDATE
1711 r = inflate_fast(c->lbits, c->dbits, c->ltree, c->dtree, s, z);
1712 LOAD
1713 if (r != Z_OK)
1714 {
1715 c->mode = r == Z_STREAM_END ? WASH : BADCODE;
1716 break;
1717 }
1718 }
1719#endif /* !SLOW */
1720 c->sub.code.need = c->lbits;
1721 c->sub.code.tree = c->ltree;
1722 c->mode = LEN;
1723 case LEN: /* i: get length/literal/eob next */
1724 j = c->sub.code.need;
1725 NEEDBITS(j)
1726 t = c->sub.code.tree + ((uInt)b & inflate_mask[j]);
1727 DUMPBITS(t->bits)
1728 e = (uInt)(t->exop);
1729 if (e == 0) /* literal */
1730 {
1731 c->sub.lit = t->base;
1732 Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
1733 "inflate: literal '%c'\n" :
1734 "inflate: literal 0x%02x\n", t->base));
1735 c->mode = LIT;
1736 break;
1737 }
1738 if (e & 16) /* length */
1739 {
1740 c->sub.copy.get = e & 15;
1741 c->len = t->base;
1742 c->mode = LENEXT;
1743 break;
1744 }
1745 if ((e & 64) == 0) /* next table */
1746 {
1747 c->sub.code.need = e;
1748 c->sub.code.tree = t->next;
1749 break;
1750 }
1751 if (e & 32) /* end of block */
1752 {
1753 Tracevv((stderr, "inflate: end of block\n"));
1754 c->mode = WASH;
1755 break;
1756 }
1757 c->mode = BADCODE; /* invalid code */
1758 z->msg = "invalid literal/length code";
1759 r = Z_DATA_ERROR;
1760 LEAVE
1761 case LENEXT: /* i: getting length extra (have base) */
1762 j = c->sub.copy.get;
1763 NEEDBITS(j)
1764 c->len += (uInt)b & inflate_mask[j];
1765 DUMPBITS(j)
1766 c->sub.code.need = c->dbits;
1767 c->sub.code.tree = c->dtree;
1768 Tracevv((stderr, "inflate: length %u\n", c->len));
1769 c->mode = DIST;
1770 case DIST: /* i: get distance next */
1771 j = c->sub.code.need;
1772 NEEDBITS(j)
1773 t = c->sub.code.tree + ((uInt)b & inflate_mask[j]);
1774 DUMPBITS(t->bits)
1775 e = (uInt)(t->exop);
1776 if (e & 16) /* distance */
1777 {
1778 c->sub.copy.get = e & 15;
1779 c->sub.copy.dist = t->base;
1780 c->mode = DISTEXT;
1781 break;
1782 }
1783 if ((e & 64) == 0) /* next table */
1784 {
1785 c->sub.code.need = e;
1786 c->sub.code.tree = t->next;
1787 break;
1788 }
1789 c->mode = BADCODE; /* invalid code */
1790 z->msg = "invalid distance code";
1791 r = Z_DATA_ERROR;
1792 LEAVE
1793 case DISTEXT: /* i: getting distance extra */
1794 j = c->sub.copy.get;
1795 NEEDBITS(j)
1796 c->sub.copy.dist += (uInt)b & inflate_mask[j];
1797 DUMPBITS(j)
1798 Tracevv((stderr, "inflate: distance %u\n", c->sub.copy.dist));
1799 c->mode = COPY;
1800 case COPY: /* o: copying bytes in window, waiting for space */
1801#ifndef __TURBOC__ /* Turbo C bug for following expression */
1802 f = (uInt)(q - s->window) < c->sub.copy.dist ?
1803 s->end - (c->sub.copy.dist - (q - s->window)) :
1804 q - c->sub.copy.dist;
1805#else
1806 f = q - c->sub.copy.dist;
1807 if ((uInt)(q - s->window) < c->sub.copy.dist)
1808 f = s->end - (c->sub.copy.dist - (q - s->window));
1809#endif
1810 while (c->len)
1811 {
1812 NEEDOUT
1813 OUTBYTE(*f++)
1814 if (f == s->end)
1815 f = s->window;
1816 c->len--;
1817 }
1818 c->mode = START;
1819 break;
1820 case LIT: /* o: got literal, waiting for output space */
1821 NEEDOUT
1822 OUTBYTE(c->sub.lit)
1823 c->mode = START;
1824 break;
1825 case WASH: /* o: got eob, possibly more output */
1826 FLUSH
1827 if (s->read != s->write)
1828 LEAVE
1829 c->mode = END;
1830 case END:
1831 r = Z_STREAM_END;
1832 LEAVE
1833 case BADCODE: /* x: got error */
1834 r = Z_DATA_ERROR;
1835 LEAVE
1836 default:
1837 r = Z_STREAM_ERROR;
1838 LEAVE
1839 }
1840}
1841
1842
1843local void inflate_codes_free(c, z)
1844inflate_codes_statef *c;
1845z_stream *z;
1846{
1847 ZFREE(z, c, sizeof(struct inflate_codes_state));
1848 Tracev((stderr, "inflate: codes free\n"));
1849}
1850
1851/*+++++*/
1852/* inflate_util.c -- data and routines common to blocks and codes
1853 * Copyright (C) 1995 Mark Adler
1854 * For conditions of distribution and use, see copyright notice in zlib.h
1855 */
1856
1857/* copy as much as possible from the sliding window to the output area */
1858local int inflate_flush(s, z, r)
1859inflate_blocks_statef *s;
1860z_stream *z;
1861int r;
1862{
1863 uInt n;
1864 Bytef *p, *q;
1865
1866 /* local copies of source and destination pointers */
1867 p = z->next_out;
1868 q = s->read;
1869
1870 /* compute number of bytes to copy as far as end of window */
1871 n = (uInt)((q <= s->write ? s->write : s->end) - q);
1872 if (n > z->avail_out) n = z->avail_out;
1873 if (n && r == Z_BUF_ERROR) r = Z_OK;
1874
1875 /* update counters */
1876 z->avail_out -= n;
1877 z->total_out += n;
1878
1879 /* update check information */
1880 if (s->checkfn != Z_NULL)
1881 s->check = (*s->checkfn)(s->check, q, n);
1882
1883 /* copy as far as end of window */
1884 zmemcpy(p, q, n);
1885 p += n;
1886 q += n;
1887
1888 /* see if more to copy at beginning of window */
1889 if (q == s->end)
1890 {
1891 /* wrap pointers */
1892 q = s->window;
1893 if (s->write == s->end)
1894 s->write = s->window;
1895
1896 /* compute bytes to copy */
1897 n = (uInt)(s->write - q);
1898 if (n > z->avail_out) n = z->avail_out;
1899 if (n && r == Z_BUF_ERROR) r = Z_OK;
1900
1901 /* update counters */
1902 z->avail_out -= n;
1903 z->total_out += n;
1904
1905 /* update check information */
1906 if (s->checkfn != Z_NULL)
1907 s->check = (*s->checkfn)(s->check, q, n);
1908
1909 /* copy */
1910 zmemcpy(p, q, n);
1911 p += n;
1912 q += n;
1913 }
1914
1915 /* update pointers */
1916 z->next_out = p;
1917 s->read = q;
1918
1919 /* done */
1920 return r;
1921}
1922
1923
1924/*+++++*/
1925/* inffast.c -- process literals and length/distance pairs fast
1926 * Copyright (C) 1995 Mark Adler
1927 * For conditions of distribution and use, see copyright notice in zlib.h
1928 */
1929
1930/* simplify the use of the inflate_huft type with some defines */
1931#define base more.Base
1932#define next more.Next
1933#define exop word.what.Exop
1934#define bits word.what.Bits
1935
1936/* macros for bit input with no checking and for returning unused bytes */
1937#define GRABBITS(j) {while(k<(j)){b|=((uLong)NEXTBYTE)<<k;k+=8;}}
1938#define UNGRAB {n+=(c=k>>3);p-=c;k&=7;}
1939
1940/* Called with number of bytes left to write in window at least 258
1941 (the maximum string length) and number of input bytes available
1942 at least ten. The ten bytes are six bytes for the longest length/
1943 distance pair plus four bytes for overloading the bit buffer. */
1944
1945local int inflate_fast(bl, bd, tl, td, s, z)
1946uInt bl, bd;
1947inflate_huft *tl, *td;
1948inflate_blocks_statef *s;
1949z_stream *z;
1950{
1951 inflate_huft *t; /* temporary pointer */
1952 uInt e; /* extra bits or operation */
1953 uLong b; /* bit buffer */
1954 uInt k; /* bits in bit buffer */
1955 Bytef *p; /* input data pointer */
1956 uInt n; /* bytes available there */
1957 Bytef *q; /* output window write pointer */
1958 uInt m; /* bytes to end of window or read pointer */
1959 uInt ml; /* mask for literal/length tree */
1960 uInt md; /* mask for distance tree */
1961 uInt c; /* bytes to copy */
1962 uInt d; /* distance back to copy from */
1963 Bytef *r; /* copy source pointer */
1964
1965 /* load input, output, bit values */
1966 LOAD
1967
1968 /* initialize masks */
1969 ml = inflate_mask[bl];
1970 md = inflate_mask[bd];
1971
1972 /* do until not enough input or output space for fast loop */
1973 do { /* assume called with m >= 258 && n >= 10 */
1974 /* get literal/length code */
1975 GRABBITS(20) /* max bits for literal/length code */
1976 if ((e = (t = tl + ((uInt)b & ml))->exop) == 0)
1977 {
1978 DUMPBITS(t->bits)
1979 Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
1980 "inflate: * literal '%c'\n" :
1981 "inflate: * literal 0x%02x\n", t->base));
1982 *q++ = (Byte)t->base;
1983 m--;
1984 continue;
1985 }
1986 do {
1987 DUMPBITS(t->bits)
1988 if (e & 16)
1989 {
1990 /* get extra bits for length */
1991 e &= 15;
1992 c = t->base + ((uInt)b & inflate_mask[e]);
1993 DUMPBITS(e)
1994 Tracevv((stderr, "inflate: * length %u\n", c));
1995
1996 /* decode distance base of block to copy */
1997 GRABBITS(15); /* max bits for distance code */
1998 e = (t = td + ((uInt)b & md))->exop;
1999 do {
2000 DUMPBITS(t->bits)
2001 if (e & 16)
2002 {
2003 /* get extra bits to add to distance base */
2004 e &= 15;
2005 GRABBITS(e) /* get extra bits (up to 13) */
2006 d = t->base + ((uInt)b & inflate_mask[e]);
2007 DUMPBITS(e)
2008 Tracevv((stderr, "inflate: * distance %u\n", d));
2009
2010 /* do the copy */
2011 m -= c;
2012 if ((uInt)(q - s->window) >= d) /* offset before dest */
2013 { /* just copy */
2014 r = q - d;
2015 *q++ = *r++; c--; /* minimum count is three, */
2016 *q++ = *r++; c--; /* so unroll loop a little */
2017 }
2018 else /* else offset after destination */
2019 {
2020 e = d - (q - s->window); /* bytes from offset to end */
2021 r = s->end - e; /* pointer to offset */
2022 if (c > e) /* if source crosses, */
2023 {
2024 c -= e; /* copy to end of window */
2025 do {
2026 *q++ = *r++;
2027 } while (--e);
2028 r = s->window; /* copy rest from start of window */
2029 }
2030 }
2031 do { /* copy all or what's left */
2032 *q++ = *r++;
2033 } while (--c);
2034 break;
2035 }
2036 else if ((e & 64) == 0)
2037 e = (t = t->next + ((uInt)b & inflate_mask[e]))->exop;
2038 else
2039 {
2040 z->msg = "invalid distance code";
2041 UNGRAB
2042 UPDATE
2043 return Z_DATA_ERROR;
2044 }
2045 } while (1);
2046 break;
2047 }
2048 if ((e & 64) == 0)
2049 {
2050 if ((e = (t = t->next + ((uInt)b & inflate_mask[e]))->exop) == 0)
2051 {
2052 DUMPBITS(t->bits)
2053 Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
2054 "inflate: * literal '%c'\n" :
2055 "inflate: * literal 0x%02x\n", t->base));
2056 *q++ = (Byte)t->base;
2057 m--;
2058 break;
2059 }
2060 }
2061 else if (e & 32)
2062 {
2063 Tracevv((stderr, "inflate: * end of block\n"));
2064 UNGRAB
2065 UPDATE
2066 return Z_STREAM_END;
2067 }
2068 else
2069 {
2070 z->msg = "invalid literal/length code";
2071 UNGRAB
2072 UPDATE
2073 return Z_DATA_ERROR;
2074 }
2075 } while (1);
2076 } while (m >= 258 && n >= 10);
2077
2078 /* not enough input or output--restore pointers and return */
2079 UNGRAB
2080 UPDATE
2081 return Z_OK;
2082}
2083
2084
2085/*+++++*/
2086/* zutil.c -- target dependent utility functions for the compression library
2087 * Copyright (C) 1995 Jean-loup Gailly.
2088 * For conditions of distribution and use, see copyright notice in zlib.h
2089 */
2090
2091/* From: zutil.c,v 1.8 1995/05/03 17:27:12 jloup Exp */
2092
2093char *zlib_version = ZLIB_VERSION;
2094
2095char *z_errmsg[] = {
2096"stream end", /* Z_STREAM_END 1 */
2097"", /* Z_OK 0 */
2098"file error", /* Z_ERRNO (-1) */
2099"stream error", /* Z_STREAM_ERROR (-2) */
2100"data error", /* Z_DATA_ERROR (-3) */
2101"insufficient memory", /* Z_MEM_ERROR (-4) */
2102"buffer error", /* Z_BUF_ERROR (-5) */
2103""};
2104
2105
2106/*+++++*/
2107/* adler32.c -- compute the Adler-32 checksum of a data stream
2108 * Copyright (C) 1995 Mark Adler
2109 * For conditions of distribution and use, see copyright notice in zlib.h
2110 */
2111
2112/* From: adler32.c,v 1.6 1995/05/03 17:27:08 jloup Exp */
2113
2114#define BASE 65521L /* largest prime smaller than 65536 */
2115#define NMAX 5552
2116/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
2117
2118#define DO1(buf) {s1 += *buf++; s2 += s1;}
2119#define DO2(buf) DO1(buf); DO1(buf);
2120#define DO4(buf) DO2(buf); DO2(buf);
2121#define DO8(buf) DO4(buf); DO4(buf);
2122#define DO16(buf) DO8(buf); DO8(buf);
2123
2124/* ========================================================================= */
2125uLong adler32(adler, buf, len)
2126 uLong adler;
2127 Bytef *buf;
2128 uInt len;
2129{
2130 unsigned long s1 = adler & 0xffff;
2131 unsigned long s2 = (adler >> 16) & 0xffff;
2132 int k;
2133
2134 if (buf == Z_NULL) return 1L;
2135
2136 while (len > 0) {
2137 k = len < NMAX ? len : NMAX;
2138 len -= k;
2139 while (k >= 16) {
2140 DO16(buf);
2141 k -= 16;
2142 }
2143 if (k != 0) do {
2144 DO1(buf);
2145 } while (--k);
2146 s1 %= BASE;
2147 s2 %= BASE;
2148 }
2149 return (s2 << 16) | s1;
2150}
diff --git a/arch/xtensa/boot/lib/zmem.c b/arch/xtensa/boot/lib/zmem.c
new file mode 100644
index 000000000000..7848f126d67d
--- /dev/null
+++ b/arch/xtensa/boot/lib/zmem.c
@@ -0,0 +1,87 @@
1#include "zlib.h"
2
3/* bits taken from ppc */
4
5extern void *avail_ram, *end_avail;
6
7void exit (void)
8{
9 for (;;);
10}
11
12void *zalloc(void *x, unsigned items, unsigned size)
13{
14 void *p = avail_ram;
15
16 size *= items;
17 size = (size + 7) & -8;
18 avail_ram += size;
19 if (avail_ram > end_avail) {
20 //puts("oops... out of memory\n");
21 //pause();
22 exit ();
23 }
24 return p;
25}
26
27void zfree(void *x, void *addr, unsigned nb)
28{
29}
30
31
32#define HEAD_CRC 2
33#define EXTRA_FIELD 4
34#define ORIG_NAME 8
35#define COMMENT 0x10
36#define RESERVED 0xe0
37
38#define DEFLATED 8
39
40void gunzip (void *dst, int dstlen, unsigned char *src, int *lenp)
41{
42 z_stream s;
43 int r, i, flags;
44
45 /* skip header */
46
47 i = 10;
48 flags = src[3];
49 if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
50 //puts("bad gzipped data\n");
51 exit();
52 }
53 if ((flags & EXTRA_FIELD) != 0)
54 i = 12 + src[10] + (src[11] << 8);
55 if ((flags & ORIG_NAME) != 0)
56 while (src[i++] != 0)
57 ;
58 if ((flags & COMMENT) != 0)
59 while (src[i++] != 0)
60 ;
61 if ((flags & HEAD_CRC) != 0)
62 i += 2;
63 if (i >= *lenp) {
64 //puts("gunzip: ran out of data in header\n");
65 exit();
66 }
67
68 s.zalloc = zalloc;
69 s.zfree = zfree;
70 r = inflateInit2(&s, -MAX_WBITS);
71 if (r != Z_OK) {
72 //puts("inflateInit2 returned "); puthex(r); puts("\n");
73 exit();
74 }
75 s.next_in = src + i;
76 s.avail_in = *lenp - i;
77 s.next_out = dst;
78 s.avail_out = dstlen;
79 r = inflate(&s, Z_FINISH);
80 if (r != Z_OK && r != Z_STREAM_END) {
81 //puts("inflate returned "); puthex(r); puts("\n");
82 exit();
83 }
84 *lenp = s.next_out - (unsigned char *) dst;
85 inflateEnd(&s);
86}
87
diff --git a/arch/xtensa/boot/ramdisk/Makefile b/arch/xtensa/boot/ramdisk/Makefile
new file mode 100644
index 000000000000..b12f76352438
--- /dev/null
+++ b/arch/xtensa/boot/ramdisk/Makefile
@@ -0,0 +1,23 @@
1#
2# Makefile for a ramdisk image
3#
4
5BIG_ENDIAN := $(shell echo -e "\#ifdef __XTENSA_EL__\nint little;\n\#else\nint big;\n\#endif" | $(CC) -E -|grep -c big)
6
7ifeq ($(BIG_ENDIAN),1)
8OBJCOPY_ARGS := -O elf32-xtensa-be
9else
10OBJCOPY_ARGS := -O elf32-xtensa-le
11endif
12
13obj-y = ramdisk.o
14
15RAMDISK_IMAGE = arch/$(ARCH)/boot/ramdisk/$(CONFIG_EMBEDDED_RAMDISK_IMAGE)
16
17arch/$(ARCH)/boot/ramdisk/ramdisk.o:
18 $(Q)echo -e "dummy:" | $(AS) -o $@;
19 $(Q)$(OBJCOPY) $(OBJCOPY_ARGS) \
20 --add-section .initrd=$(RAMDISK_IMAGE) \
21 --set-section-flags .initrd=contents,alloc,load,load,data \
22 arch/$(ARCH)/boot/ramdisk/ramdisk.o $@
23
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-20 13:32:21 -0400