diff options
Diffstat (limited to 'usr.bin/kzip/kzip.c')
| -rw-r--r-- | usr.bin/kzip/kzip.c | 115 |
1 files changed, 102 insertions, 13 deletions
diff --git a/usr.bin/kzip/kzip.c b/usr.bin/kzip/kzip.c index 3115da7..bf4681f 100644 --- a/usr.bin/kzip/kzip.c +++ b/usr.bin/kzip/kzip.c @@ -9,7 +9,7 @@ * Copyright (C) 1993 Hannu Savolainen * Ported to 386bsd by Serge Vakulenko * based on tools/build.c by Linus Torvalds - * $Id: kzip.c,v 1.2 1995/04/25 05:27:04 phk Exp $ + * $Id: kzip.c,v 1.3 1995/05/30 06:31:03 rgrimes Exp $ * */ @@ -18,6 +18,8 @@ #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> @@ -26,29 +28,81 @@ /* 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; + 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]; - - if(argc != 2) { - fprintf(stderr,"usage:\n\t%s kernel\n",argv[0]); - return 2; + 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; + } } - strcpy(obj,argv[1]); strcat(obj,".o"); - strcpy(out,argv[1]); strcat(out,".kz"); + 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(argv[1],O_RDONLY); + fdi = open(kernname ,O_RDONLY); if(fdi<0) { - perror(argv[1]); + 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); @@ -67,7 +121,7 @@ main(int argc, char **argv) close(pipe1[0]); close(pipe1[1]); close(pipe2[0]); close(pipe2[1]); close(fdi); close(fdo); - extract(argv[1]); + extract(kernname); exit(0); } @@ -123,6 +177,19 @@ main(int argc, char **argv) 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) { @@ -131,11 +198,12 @@ main(int argc, char **argv) "-Bstatic", "-Z", "-T", - KZBASE, + base, "-o", out, - "/usr/lib/kzip.o", + "/usr/lib/kzhead.o", obj, + "/usr/lib/kztail.o", 0); exit(2); } @@ -148,6 +216,27 @@ main(int argc, char **argv) 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); } |
