mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-12-30 15:38:06 +01:00
4159dde275
uncompression by the "proper" kernel. These changes also add a -v option so you can see how much room you are using, and check to make sure you're not going past the 4MB boundary. This depends on the corresponding changes to sys/i386/boot/kzipboot. Submitted by: Gary Jones(?) <gj@freefall>, and my code merged in.
349 lines
6.9 KiB
C
349 lines
6.9 KiB
C
/*
|
|
* ----------------------------------------------------------------------------
|
|
* "THE BEER-WARE LICENSE" (Revision 42):
|
|
* <phk@login.dknet.dk> wrote this file. As long as you retain this notice you
|
|
* can do whatever you want with this stuff. If we meet some day, and you think
|
|
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
|
|
* ----------------------------------------------------------------------------
|
|
*
|
|
* Copyright (C) 1993 Hannu Savolainen
|
|
* Ported to 386bsd by Serge Vakulenko
|
|
* based on tools/build.c by Linus Torvalds
|
|
* $Id: kzip.c,v 1.3 1995/05/30 06:31:03 rgrimes Exp $
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sys/file.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/param.h>
|
|
#include <sys/wait.h>
|
|
#include <a.out.h>
|
|
#include <string.h>
|
|
|
|
#define MAXIMAGE (2*1024*1024)
|
|
/* This is the limit because a kzip'ed kernel loads at 3Mb and
|
|
* ends up at 1Mb
|
|
*/
|
|
void
|
|
Usage(char *prog)
|
|
{
|
|
fprintf(stderr,"usage:\n\t%s [ -l loadaddr] kernel\n", prog);
|
|
exit(1);
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
pid_t Pext, Pgzip, Ppiggy, Pld;
|
|
int pipe1[2], pipe2[2];
|
|
int status, fdi, fdo, fdn, c, verbose;
|
|
int size;
|
|
struct exec hdr;
|
|
int zip_size, offset;
|
|
struct stat st;
|
|
u_long forceaddr = 0, addr, entry;
|
|
char *kernname;
|
|
char obj[BUFSIZ];
|
|
char out[BUFSIZ];
|
|
char base[32];
|
|
|
|
while ((c = getopt(argc, argv, "l:v")) != EOF) {
|
|
switch (c) {
|
|
case 'l':
|
|
forceaddr = strtoul(optarg, NULL, 0);
|
|
if (forceaddr == 0) {
|
|
fprintf(stderr, "Invalid load address!\n");
|
|
exit(1);
|
|
}
|
|
break;
|
|
case 'v':
|
|
verbose++;
|
|
break;
|
|
default:
|
|
Usage(argv[0]);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ((argc - optind) != 1)
|
|
Usage(argv[0]);
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
kernname = argv[0];
|
|
|
|
strcpy(obj, kernname); strcat(obj,".o");
|
|
strcpy(out, kernname); strcat(out,".kz");
|
|
|
|
fdi = open(kernname ,O_RDONLY);
|
|
if(fdi<0) {
|
|
perror(kernname);
|
|
return 2;
|
|
}
|
|
|
|
/* figure out how big the uncompressed image will be */
|
|
if (read (fdi, (char *)&hdr, sizeof(hdr)) != sizeof(hdr)) {
|
|
perror(argv[1]);
|
|
exit(2);
|
|
}
|
|
|
|
size = hdr.a_text + hdr.a_data + hdr.a_bss;
|
|
entry = hdr.a_entry - 0xf0000000; /* replace KZBASE */
|
|
|
|
lseek (fdi, 0, SEEK_SET);
|
|
|
|
if (verbose) {
|
|
printf("real kernel start address will be: 0x%x\n", entry);
|
|
printf("real kernel end address will be: 0x%x\n", entry+size);
|
|
}
|
|
|
|
|
|
fdo = open(obj,O_WRONLY|O_TRUNC|O_CREAT,0666);
|
|
if(fdo<0) {
|
|
perror(obj);
|
|
return 2;
|
|
}
|
|
|
|
if (pipe(pipe1) < 0) { perror("pipe()"); return 1; }
|
|
|
|
if (pipe(pipe2) < 0) { perror("pipe()"); return 1; }
|
|
|
|
Pext = fork();
|
|
if (Pext < 0) { perror("fork()"); return 1; }
|
|
if (!Pext) {
|
|
dup2(fdi,0);
|
|
dup2(pipe1[1],1);
|
|
close(pipe1[0]); close(pipe1[1]);
|
|
close(pipe2[0]); close(pipe2[1]);
|
|
close(fdi); close(fdo);
|
|
extract(kernname);
|
|
exit(0);
|
|
}
|
|
|
|
Pgzip = fork();
|
|
if (Pgzip < 0) { perror("fork()"); return 1; }
|
|
if (!Pgzip) {
|
|
dup2(pipe1[0],0);
|
|
dup2(pipe2[1],1);
|
|
close(pipe1[0]); close(pipe1[1]);
|
|
close(pipe2[0]); close(pipe2[1]);
|
|
close(fdi); close(fdo);
|
|
execlp("gzip", "gzip", "-9", "-n", 0);
|
|
exit (0);
|
|
}
|
|
|
|
Ppiggy = fork();
|
|
if (Ppiggy < 0) { perror("fork()"); return 1; }
|
|
if (!Ppiggy) {
|
|
dup2(pipe2[0],0);
|
|
dup2(fdo,1);
|
|
close(pipe1[0]); close(pipe1[1]);
|
|
close(pipe2[0]); close(pipe2[1]);
|
|
close(fdi); close(fdo);
|
|
piggyback(obj);
|
|
exit(0);
|
|
}
|
|
|
|
close(pipe1[0]); close(pipe1[1]);
|
|
close(pipe2[0]); close(pipe2[1]);
|
|
close(fdi); close(fdo);
|
|
|
|
if (waitpid(Pext, &status,0) < 0)
|
|
{ perror("waitpid(Pextract)"); return 1; }
|
|
|
|
if(status) {
|
|
fprintf(stderr,"extract returned %x\n",status);
|
|
return 3;
|
|
}
|
|
|
|
if (waitpid(Pgzip, &status,0) < 0)
|
|
{ perror("waitpid(Pgzip)"); return 1; }
|
|
|
|
if(status) {
|
|
fprintf(stderr,"gzip returned %x\n",status);
|
|
return 3;
|
|
}
|
|
|
|
if (waitpid(Ppiggy, &status,0) < 0)
|
|
{ perror("waitpid(Ppiggy)"); return 1; }
|
|
|
|
if(status) {
|
|
fprintf(stderr,"piggyback returned %x\n",status);
|
|
return 3;
|
|
}
|
|
|
|
if (forceaddr)
|
|
offset = forceaddr;
|
|
else {
|
|
/* a kludge to dynamically figure out where to start it */
|
|
if (stat (obj, &st) < 0) {
|
|
perror("cannot get size of compressed data");
|
|
return 3;
|
|
}
|
|
zip_size = (int)st.st_size;
|
|
offset = entry + size - zip_size + 0x8000; /* fudge factor */
|
|
}
|
|
sprintf(base, "0x%x", roundup(offset, 4096));
|
|
|
|
Pld = fork();
|
|
if (Pld < 0) { perror("fork()"); return 1; }
|
|
if (!Pld) {
|
|
execlp("ld",
|
|
"ld",
|
|
"-Bstatic",
|
|
"-Z",
|
|
"-T",
|
|
base,
|
|
"-o",
|
|
out,
|
|
"/usr/lib/kzhead.o",
|
|
obj,
|
|
"/usr/lib/kztail.o",
|
|
0);
|
|
exit(2);
|
|
}
|
|
|
|
if (waitpid(Pld, &status,0) < 0)
|
|
{ perror("waitpid(Pld)"); return 1; }
|
|
|
|
if(status) {
|
|
fprintf(stderr,"ld returned %x\n",status);
|
|
return 3;
|
|
}
|
|
|
|
if (verbose) {
|
|
|
|
fdn = open(obj ,O_RDONLY);
|
|
if(fdn<0) {
|
|
perror(obj);
|
|
return 3;
|
|
}
|
|
|
|
/* figure out how big the compressed image is */
|
|
if (read (fdn, (char *)&hdr, sizeof(hdr)) != sizeof(hdr)) {
|
|
perror(obj);
|
|
return 3;
|
|
}
|
|
close(fdn);
|
|
|
|
size = hdr.a_text + hdr.a_data + hdr.a_bss;
|
|
|
|
printf("kzip data start address will be: 0x%x\n",offset);
|
|
printf("kzip data end address will be: 0x%x\n",offset+size);
|
|
}
|
|
|
|
unlink(obj);
|
|
exit(0);
|
|
}
|
|
|
|
int
|
|
extract (char *file)
|
|
{
|
|
int sz;
|
|
char buf[BUFSIZ];
|
|
struct exec hdr;
|
|
|
|
if (read (0, (char *)&hdr, sizeof(hdr)) != sizeof(hdr)) {
|
|
perror(file);
|
|
exit(2);
|
|
}
|
|
if (hdr.a_magic != ZMAGIC) {
|
|
fprintf(stderr,"Bad magic in file %s, probably not a kernel\n",
|
|
file);
|
|
exit(2);
|
|
}
|
|
if (lseek (0, N_TXTOFF(hdr), 0) < 0) {
|
|
perror(file);
|
|
exit(2);
|
|
}
|
|
|
|
sz = N_SYMOFF (hdr) - N_TXTOFF (hdr);
|
|
|
|
while (sz) {
|
|
int l, n;
|
|
|
|
l = sz;
|
|
if (l > sizeof(buf))
|
|
l = sizeof(buf);
|
|
|
|
n = read (0, buf, l);
|
|
if (n != l) {
|
|
if (n == -1)
|
|
perror (file);
|
|
else
|
|
fprintf (stderr, "Unexpected EOF\n");
|
|
|
|
exit(1);
|
|
}
|
|
|
|
write (1, buf, l);
|
|
sz -= l;
|
|
}
|
|
exit(0);
|
|
}
|
|
|
|
|
|
char string_names[] = {"_input_data\0_input_len\0"};
|
|
|
|
struct nlist var_names[2] = { /* Symbol table */
|
|
{ { (char*) 4 }, N_EXT|N_TEXT, 0, 0, 0 }, /* _input_data */
|
|
{ { (char*) 16 }, N_EXT|N_TEXT, 0, 0, 0 }, /* _input_len */
|
|
};
|
|
|
|
int
|
|
piggyback(char *file)
|
|
{
|
|
int n, len;
|
|
struct exec hdr; /* object header */
|
|
char image[MAXIMAGE]; /* kernel image buffer */
|
|
|
|
len = 0;
|
|
while ((n = read (0, &image[len], sizeof(image)-len+1)) > 0)
|
|
len += n;
|
|
|
|
if (n < 0) {
|
|
perror ("stdin");
|
|
exit (1);
|
|
}
|
|
|
|
if (len >= sizeof(image)) {
|
|
fprintf (stderr,"Input too large\n");
|
|
exit (1);
|
|
}
|
|
|
|
/*
|
|
* Output object header
|
|
*/
|
|
memset(&hdr,0,sizeof hdr);
|
|
hdr.a_magic = OMAGIC;
|
|
hdr.a_text = len + sizeof(long);
|
|
hdr.a_syms = sizeof(var_names);
|
|
write (1, (char *)&hdr, sizeof(hdr));
|
|
|
|
/*
|
|
* Output text segment (compressed system & len)
|
|
*/
|
|
write (1, image, len);
|
|
write (1, (char *)&len, sizeof(len));
|
|
|
|
/*
|
|
* Output symbol table
|
|
*/
|
|
var_names[1].n_value = len;
|
|
write (1, (char *)&var_names, sizeof(var_names));
|
|
|
|
/*
|
|
* Output string table
|
|
*/
|
|
len = sizeof(string_names) + sizeof(len);
|
|
write (1, (char *)&len, sizeof(len));
|
|
write (1, string_names, sizeof(string_names));
|
|
|
|
return (0);
|
|
}
|