wok annotate syslinux/stuff/iso2exe/boot.c @ rev 17160

syslinux/iso2exe: full zImage support
author Pascal Bellard <pascal.bellard@slitaz.org>
date Wed Sep 17 11:38:34 2014 +0200 (2014-09-17)
parents d814ca840c3c
children 054f70cb9bec
rev   line source
pascal@13691 1 #include <asm/limits.h>
pascal@13691 2 #include <sys/types.h>
pascal@13691 3 #include <unistd.h>
pascal@13691 4 #include <fcntl.h>
pascal@13691 5 #include <stdio.h>
pascal@13691 6 #include "iso9660.h"
pascal@13691 7 #include "bootlinux.h"
pascal@13691 8 #include "libdos.h"
pascal@13691 9
pascal@13691 10 static void usage(char *iso)
pascal@13691 11 {
pascal@13691 12 printf("Usage: %s [[@commands]|[kernel=<bzimage>] \
pascal@13691 13 [initrd=<rootfs>[,<rootfs2>...]] [iso=<isofile>] ...]\n\n\
pascal@13691 14 Defaults: %s @tazboot.cmd or %s kernel=bzImage auto\n\n\
pascal@13691 15 Examples for tazboot.cmd:\n\n\
pascal@13691 16 iso=\\isos\\slitaz-4.0.iso\n\
pascal@13691 17 kernel=boot/bzImage\n\
pascal@16012 18 initrd=boot/rootfs4.gz,boot/rootfs3.gz,boot/rootfs2.gz,boot/rootfs1.gz,\\slitaz\\extrafs.gz\n\
pascal@13691 19 rw root=/dev/null vga=normal autologin\n\n\
pascal@13691 20 kernel=\\slitaz\\vmlinuz\n\
pascal@13691 21 root=/dev/sda5 ro\n",iso,iso,iso);
pascal@13691 22 exit(1);
pascal@13691 23 }
pascal@13691 24
pascal@13691 25 static void bootiso(char **iso)
pascal@13691 26 {
pascal@16025 27 char *init = " rdinit=/init.exe", *mode="menu", *fmt="";
pascal@16002 28 char c, rootfs[16], cmdline[256];
pascal@16012 29 int restart;
pascal@13691 30 unsigned long magic;
pascal@13691 31
pascal@13691 32 if (isoreset(*iso) || isoopen("boot")) return;
pascal@13691 33 if (iso[1] && !strcmp(mode = iso[1], "text"))
pascal@13691 34 init = "";
pascal@13691 35 for (c = 0, restart = 1; isoreaddir(restart) == 0; restart = 0) {
pascal@16002 36 if (strncmp(isofilename, "rootfs", 6)
pascal@16002 37 || c > isofilename[6]) continue;
pascal@13691 38 strcpy(rootfs, isofilename);
pascal@16002 39 c = isofilename[6];
pascal@13691 40 }
pascal@13691 41 if (isoopen(mode))
pascal@13691 42 isoopen("bzImage");
pascal@16025 43 magic = loadkernel();
pascal@16025 44 if (magic < 0x20630)
pascal@14257 45 init = ""; // Does not support multiple initramfs
pascal@16025 46 if (magic > 0) {
pascal@16041 47 fmt = "rw root=/dev/null%s iso=%s magic=%lu mode=%s autologin";
pascal@16041 48 if (rootfs[6] != '.' && !isoopen("rootfs.gz"))
pascal@16041 49 loadinitrd(); // for loram
pascal@16025 50 isoopen(rootfs);
pascal@16025 51 loadinitrd();
pascal@16025 52 if (*init) {
pascal@16025 53 lseek(isofd, 24L, SEEK_SET);
pascal@16025 54 read(isofd, &magic, 4);
pascal@16025 55 isofilesize = magic & 0xFFFFL;
pascal@16025 56 isofileofs = 0x7EE0L - isofilesize;
pascal@16025 57 if (isofilesize) loadinitrd();
pascal@16025 58 else init="";
pascal@16025 59 }
pascal@16025 60 }
pascal@16025 61 sprintf(cmdline, fmt, init, *iso, magic, mode);
pascal@13691 62 close(isofd);
pascal@13691 63 bootlinux(cmdline);
pascal@13691 64 }
pascal@13691 65
pascal@13691 66 static int stricmp(char *ref, char *s)
pascal@13691 67 {
pascal@13691 68 char c;
pascal@13691 69 while (*ref) {
pascal@13691 70 c = *s++;
pascal@13691 71 if (c >= 'A' && c <= 'Z') c += 'a' - 'A';
pascal@13691 72 c -= *ref++;
pascal@13691 73 if (c) return c;
pascal@13691 74 }
pascal@13691 75 return 0;
pascal@13691 76 }
pascal@13691 77
pascal@16022 78 static int chkstatus(int status, char *name)
pascal@16022 79 {
pascal@16022 80 if (status == -1)
pascal@16022 81 printf("%s not found.\n",name);
pascal@16022 82 return status;
pascal@16022 83 }
pascal@16022 84
pascal@13691 85 static char *iso;
pascal@13691 86 static int fakeopen(char *file)
pascal@13691 87 {
pascal@16002 88 if (file) {
pascal@16002 89 char *s = file;
pascal@16002 90 while (*s && *s != '\r' && *s != '\n') s++;
pascal@16002 91 *s = 0;
pascal@16002 92 }
pascal@16012 93 if (*file == '\\') {
pascal@16012 94 static fd = -1;
pascal@16012 95 if (fd >= 0) close(fd);
pascal@16022 96 fd = chkstatus(open(file, O_RDONLY), file);
pascal@16022 97 return fd;
pascal@16012 98 }
pascal@13691 99 if (iso) {
pascal@16022 100 chkstatus(isoreset(iso), iso);
pascal@16022 101 return chkstatus(isoopen(file), file);
pascal@13691 102 }
pascal@13691 103 close(isofd);
pascal@16022 104 isofd = chkstatus(open(file, O_RDONLY), file);
pascal@13691 105 if (isofd != -1) {
pascal@13691 106 isofileofs = 0;
pascal@13691 107 isofilesize = LONG_MAX;
pascal@13691 108 }
pascal@13691 109 return isofd;
pascal@13691 110 }
pascal@13691 111
pascal@13691 112 static char args[2048];
pascal@13691 113 int main(int argc, char *argv[])
pascal@13691 114 {
pascal@13691 115 char *kernel, *initrd, *cmdline, *cmdfile, *s;
pascal@13691 116
pascal@13691 117 argv[0] = progname();
pascal@14268 118 bootiso(argv); // iso ? parsing is /init.exe stuff !
pascal@16022 119 if (argc >= 2)
pascal@14268 120 bootiso(argv + 1);
pascal@13691 121
pascal@13691 122 chdirname(*argv);
pascal@13691 123 cmdfile = "tazboot.cmd";
pascal@13691 124 kernel = "bzImage";
pascal@13691 125 initrd = NULL;
pascal@13691 126 cmdline = "auto";
pascal@13691 127 if (argc > 1) {
pascal@13691 128 if (argv[1][0] == '@')
pascal@13691 129 cmdfile = argv[1] + 1;
pascal@13691 130 else {
pascal@13691 131 cmdfile = NULL;
pascal@13691 132 #asm
pascal@13691 133 push ds
pascal@13691 134 pop es
pascal@13691 135 mov si, #0x82
pascal@13691 136 mov di, #_args
pascal@13691 137 mov cx, #0x7E/2
pascal@13691 138 rep
pascal@13697 139 seg cs
pascal@13691 140 movsw
pascal@13691 141 #endasm
pascal@13691 142 }
pascal@13691 143 }
pascal@13691 144 if (cmdfile) {
pascal@13691 145 int fd;
pascal@16025 146 fd = chkstatus(open(cmdfile, O_RDONLY), cmdfile);
pascal@13691 147 if (fd != -1) {
pascal@13691 148 read(fd, args, sizeof(args));
pascal@13691 149 close(fd);
pascal@13691 150 for (s = args; s < args + sizeof(args) -1; s++) {
pascal@13691 151 if (*s == '\r') *s++ = ' ';
pascal@13691 152 if (*s == '\n') *s = ' ';
pascal@13691 153 }
pascal@13691 154 }
pascal@13691 155 }
pascal@13691 156 for (s = args; s < args + sizeof(args); s++) {
pascal@13691 157 if (*s == ' ') continue;
pascal@13691 158 if (stricmp("kernel=", s) == 0)
pascal@13691 159 kernel = s + 7;
pascal@13691 160 else if (stricmp("initrd=", s) == 0)
pascal@13691 161 initrd = s + 7;
pascal@13691 162 else if (stricmp("iso=", s) == 0)
pascal@13691 163 iso = s + 4;
pascal@13691 164 else {
pascal@13691 165 cmdline = s;
pascal@13691 166 break;
pascal@13691 167 }
pascal@13691 168 while (*s && *s != ' ') s++;
pascal@13691 169 *s = 0;
pascal@13691 170 }
pascal@16002 171 if (cmdline) {
pascal@16002 172 char *last;
pascal@16002 173 for (s = cmdline; *s && *s != '\r' && *s != '\n'; s++)
pascal@16002 174 if (*s != ' ') last = s;
pascal@16002 175 *++last = 0;
pascal@16002 176 }
pascal@13691 177 if (fakeopen(kernel) == -1)
pascal@13691 178 usage(argv[0]);
pascal@13691 179 loadkernel();
pascal@13691 180 if (initrd) {
pascal@13691 181 char *p, *q = initrd;
pascal@13691 182 while (1) {
pascal@13691 183 char c;
pascal@13691 184 for (p = q; *p && *p != ','; p++);
pascal@13691 185 c = *p;
pascal@13691 186 *p = 0;
pascal@13691 187 if (fakeopen(q) != -1)
pascal@13691 188 loadinitrd();
pascal@13691 189 if (c == 0)
pascal@13691 190 break;
pascal@13691 191 q = ++p;
pascal@13691 192 }
pascal@13691 193 }
pascal@13691 194 bootlinux(cmdline);
pascal@13691 195 }