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kgzldr is a kzipboot replacement for use with kgzip(8).

Browse Source 
Development sponsored by Global Technology Associates, Inc.

Reviewed/tested by: abial
This commit is contained in:
rnordier 1999-07-19 18:07:44 +00:00
parent 21ebb70093
commit f5a2fbe418
7 changed files with 459 additions and 0 deletions
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29
sys/boot/i386/kgzldr/Makefile Normal file
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# $Id: $
PROG= kgzldr.o
SRCS= start.s boot.c inflate.c lib.c crt.s sio.s
CFLAGS= -fno-builtin -Os
CFLAGS+=-DKZIP
LDFLAGS=-nostdlib -static -r
NOMAN=
BINDIR= /usr/lib
BINMODE=444
STRIP=
.PATH: ${.CURDIR}/../../../kern
M4?= m4
MFLAGS=
BOOT_COMCONSOLE_PORT?= 0x3f8
MFLAGS+=-DSIOPRT=${BOOT_COMCONSOLE_PORT}
all: kgzldr.o
kgzldr.o: ${OBJS}
${CC} ${LDFLAGS} -o ${.TARGET} ${OBJS}
.s.o:
(cd ${.CURDIR}; ${M4} ${MFLAGS} ${.IMPSRC}) |\
${AS} ${AFLAGS} -o ${.TARGET}
.include <bsd.prog.mk>

128
sys/boot/i386/kgzldr/boot.c Normal file
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/*
* Copyright (c) 1999 Global Technology Associates, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id:$
*/
#include <sys/types.h>
#include <sys/reboot.h>
#include <sys/inflate.h>
#include "kgzldr.h"
#define KGZ_HEAD 0xa /* leading bytes to ignore */
#define KGZ_TAIL 0x8 /* trailing bytes to ignore */
#define E_FMT 1 /* Error: Invalid format */
#define E_MEM 2 /* Error: Out of memory */
struct kgz_hdr {
char ident[4]; /* identification */
uint32_t dload; /* decoded image load address */
uint32_t dsize; /* decoded image size */
uint32_t isize; /* image size in memory */
uint32_t entry; /* program entry point */
uint32_t nsize; /* encoded image size */
};
extern struct kgz_hdr kgz; /* header */
extern uint8_t kgz_ndata[]; /* encoded image */
static const char *const msg[] = {
"done",
"invalid format",
"out of memory"
};
static const u_char *ip; /* input pointer */
static u_char *op; /* output pointer */
static struct inflate infl; /* inflate() parameters */
static int decode(void);
static int input(void *);
static int output(void *, u_char *, u_long);
/*
* Uncompress and boot a kernel.
*/
int
boot(int howto)
{
int err;
kgz_con = howto & RB_SERIAL ? KGZ_SIO : KGZ_CRT;
putstr("Uncompressing ... ");
err = decode();
putstr(msg[err]);
putstr("\n");
if (err) {
putstr("System halted");
for (;;)
;
}
return err;
}
/*
* Interface with inflate() to uncompress the data.
*/
static int
decode(void)
{
static u_char slide[GZ_WSIZE];
int err;
ip = kgz_ndata + KGZ_HEAD;
op = (u_char *)kgz.dload;
infl.gz_input = input;
infl.gz_output = output;
infl.gz_slide = slide;
err = inflate(&infl);
return err ? err == 3 ? E_MEM : E_FMT : 0;
}
/*
* Read a byte.
*/
static int
input(void *dummy)
{
if ((size_t)(ip - kgz_ndata) + KGZ_TAIL > kgz.nsize)
return GZ_EOF;
return *ip++;
}
/*
* Write some bytes.
*/
static int
output(void *dummy, u_char * ptr, u_long len)
{
if (op - (u_char *)kgz.dload + len > kgz.dsize)
return -1;
while (len--)
*op++ = *ptr++;
return 0;
}

83
sys/boot/i386/kgzldr/crt.s Normal file
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#
# Copyright (c) 1999 Global Technology Associates, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# From: btx.s 1.10 1999/02/25 16:27:41 rnordier
# $Id:$
#
# Screen defaults and assumptions.
.set SCR_MAT,0x7 # Mode/attribute
.set SCR_COL,0x50 # Columns per row
.set SCR_ROW,0x19 # Rows per screen
# BIOS Data Area locations.
.set BDA_SCR,0x449 # Video mode
.set BDA_POS,0x450 # Cursor position
.globl crt_putchr
# void crt_putchr(int c)
crt_putchr: movb 0x4(%esp,1),%al # Get character
pusha # Save
xorl %ecx,%ecx # Zero for loops
movb $SCR_MAT,%ah # Mode/attribute
movl $BDA_POS,%ebx # BDA pointer
movw (%ebx),%dx # Cursor position
movl $0xb8000,%edi # Regen buffer (color)
cmpb %ah,BDA_SCR-BDA_POS(%ebx) # Mono mode?
jne crt_putchr.1 # No
xorw %di,%di # Regen buffer (mono)
crt_putchr.1: cmpb $0xa,%al # New line?
je crt_putchr.2 # Yes
xchgl %eax,%ecx # Save char
movb $SCR_COL,%al # Columns per row
mulb %dh # * row position
addb %dl,%al # + column
adcb $0x0,%ah # position
shll %eax # * 2
xchgl %eax,%ecx # Swap char, offset
movw %ax,(%edi,%ecx,1) # Write attr:char
incl %edx # Bump cursor
cmpb $SCR_COL,%dl # Beyond row?
jb crt_putchr.3 # No
crt_putchr.2: xorb %dl,%dl # Zero column
incb %dh # Bump row
crt_putchr.3: cmpb $SCR_ROW,%dh # Beyond screen?
jb crt_putchr.4 # No
leal 2*SCR_COL(%edi),%esi # New top line
movw $(SCR_ROW-1)*SCR_COL/2,%cx # Words to move
rep # Scroll
movsl # screen
movb $' ',%al # Space
movb $SCR_COL,%cl # Columns to clear
rep # Clear
stosw # line
movb $SCR_ROW-1,%dh # Bottom line
crt_putchr.4: movw %dx,(%ebx) # Update position
popa # Restore
ret # To caller

41
sys/boot/i386/kgzldr/kgzldr.h Normal file
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/*
* Copyright (c) 1999 Global Technology Associates, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id:$
*/
#define KGZ_CRT 0x1 /* Video console */
#define KGZ_SIO 0x2 /* Serial console */
extern int kgz_con;
int boot(int);
unsigned char *kzipmalloc(int);
void kzipfree(void *);
void putstr(const char *);
void crt_putchr(int);
void sio_putchr(int);

87
sys/boot/i386/kgzldr/lib.c Normal file
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/*
* Copyright (c) 1999 Global Technology Associates, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id:$
*/
#include <sys/types.h>
#include <stddef.h>
#include "kgzldr.h"
#define MEMSIZ 0x8000 /* Memory pool size */
int kgz_con; /* Console control */
static size_t memtot; /* Memory allocated: bytes */
static u_int memcnt; /* Memory allocated: blocks */
/*
* Library functions required by inflate().
*/
/*
* Allocate memory block.
*/
unsigned char *
kzipmalloc(int size)
{
static u_char mem[MEMSIZ];
void *ptr;
if (memtot + size > MEMSIZ)
return NULL;
ptr = mem + memtot;
memtot += size;
memcnt++;
return ptr;
}
/*
* Free allocated memory block.
*/
void
kzipfree(void *ptr)
{
memcnt--;
if (!memcnt)
memtot = 0;
}
/*
* Write a string to the console.
*/
void
putstr(const char *str)
{
int c;
while ((c = *str++)) {
if (kgz_con & KGZ_CRT)
crt_putchr(c);
if (kgz_con & KGZ_SIO)
sio_putchr(c);
}
}

46
sys/boot/i386/kgzldr/sio.s Normal file
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#
# Copyright (c) 1999 Global Technology Associates, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# From: sio.s 1.3 1999/01/10 14:48:03 rnordier
# $Id:$
#
.set SIO_PRT,SIOPRT # Base port
.globl sio_putchr
# void sio_putchr(int c)
sio_putchr: movw $SIO_PRT+0x5,%dx # Line status reg
xor %ecx,%ecx # Timeout
movb $0x40,%ch # counter
sio_putchr.1: inb (%dx),%al # Transmitter
testb $0x20,%al # buffer empty?
loopz sio_putchr.1 # No
jz sio_putchr.2 # If timeout
movb 0x4(%esp,1),%al # Get character
subb $0x5,%dl # Transmitter hold reg
outb %al,(%dx) # Write character
sio_putchr.2: ret # To caller

45
sys/boot/i386/kgzldr/start.s Normal file
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#
# Copyright (c) 1999 Global Technology Associates, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# $Id:$
#
.set entry,0x10 # kgz.entry
.globl _start
# C startup code for kgzldr.
_start: cld # String ops inc
movl $_edata,%edi # Start of bss
movl $_end,%ecx # Compute
subl %edi,%ecx # size
xorl %eax,%eax # Zero
rep # Clear
stosb # bss
pushl 0x4(%esp) # Pass howto flags
call boot # Call C code
popl %ecx # Clear stack
jmp *kgz+entry # To loaded code