wok-6.x annotate linld/stuff/src/TAZBOOT.CPP @ rev 20477

Rebuild perl in 32 bits
author Pascal Bellard <pascal.bellard@slitaz.org>
date Wed Oct 17 20:44:06 2018 +0200 (2018-10-17)
parents 77cbb661144f
children 049ced0bd387
rev   line source
pascal@19515 1 // This file is distributed under GPL
pascal@19515 2 //
pascal@19515 3 // TAZBOOT main() lives here
pascal@19515 4
pascal@19515 5 #include "crtl.h"
pascal@19515 6 #include "crtlx.h"
pascal@19515 7 #include "common.h"
pascal@19515 8 #include "iso9660.h"
pascal@19515 9
pascal@19825 10 struct initrd_info {
pascal@19825 11 u32 ofs;
pascal@19825 12 u32 size;
pascal@19825 13 };
pascal@19515 14 #define MAXINITRD 10
pascal@19515 15 static struct initrd_state {
pascal@19825 16 struct initrd_info info[MAXINITRD];
pascal@19515 17 u16 cnt;
pascal@19515 18 } initrd_state;
pascal@19515 19
pascal@19515 20 static void next_chunk(struct image_himem *m)
pascal@19515 21 {
pascal@19825 22 struct initrd_info *i = &initrd_state.info[m->state];
pascal@20458 23 m->chunk_size = 0;
pascal@19825 24 if (m->state >= initrd_state.cnt) return;
pascal@19825 25 lseekset(m->fd,i->ofs);
pascal@19825 26 m->chunk_size = i->size;
pascal@19515 27 m->state++;
pascal@19515 28 }
pascal@19515 29
pascal@19538 30 static u32 isofilesize4round()
pascal@19538 31 {
pascal@19538 32 return (isofilesize+3)&-4;
pascal@19538 33 }
pascal@19538 34
pascal@19515 35 static void addinitrd()
pascal@19515 36 {
pascal@19825 37 u16 *pcnt = &initrd_state.cnt;
pascal@19825 38 struct initrd_info *i = &initrd_state.info[*pcnt];
pascal@19825 39 if (*pcnt >= MAXINITRD) return;
pascal@19825 40 ++*pcnt;
pascal@19825 41 i->size = isofilesize;
pascal@19825 42 i->ofs = isofileofs;
pascal@19538 43 initrd.size += isofilesize4round();
pascal@19515 44 }
pascal@19515 45
pascal@19515 46 static void load_initrds()
pascal@19515 47 {
pascal@19538 48 struct image_himem *m = &initrd;
pascal@19538 49 if (!m->size) return;
pascal@19538 50 m->next_chunk = next_chunk;
pascal@19538 51 m->fd = isofd;
pascal@20458 52 m->state = 0;
pascal@19538 53 next_chunk(m);
pascal@19515 54 load_initrd();
pascal@19515 55 }
pascal@19515 56
pascal@19538 57 static char *isokernel()
pascal@19515 58 {
pascal@19538 59 struct image_himem *m = &pm;
pascal@19538 60 m->chunk_size = m->size = isofilesize4round();
pascal@19538 61 m->fd = isofd;
pascal@19538 62 return load_kernel();
pascal@19515 63 }
pascal@19515 64
pascal@19825 65 char _cmdline[4096];
pascal@19825 66 const char *cmdline = (const char *) _cmdline+1;
pascal@19515 67 static void bootiso(char **iso)
pascal@19515 68 {
pascal@19825 69 const char *init = " rdinit=/init.exe", *mode="menu";
pascal@19825 70 char c;
pascal@19825 71 static char rootfs[16], fallback[16], isknoppix, noauto;
pascal@19825 72 int restart;
pascal@19515 73 unsigned long magic;
pascal@19571 74 struct isostate *x=&isostate;
pascal@19515 75
pascal@19515 76 if (!*iso || isoreset(*iso) < 0) return;
pascal@19580 77 skip_alloc++;
pascal@19580 78 base_himem = memtop() /2;
pascal@20473 79 //if (base_himem >= _64m) base_himem = _64m;
pascal@20453 80 if (* ((char *) &base_himem +3) >= 4) base_himem = _64m;
pascal@19515 81 isoopen("boot") >= 0 ||
pascal@19515 82 isoopen("live") >= 0 || // debian
pascal@19515 83 isoopen("casper") >= 0; // ubuntu
pascal@19515 84 if (iso[1] && !strcmp(mode = iso[1], "text"))
pascal@19515 85 init = "";
pascal@19515 86 do {
pascal@19899 87 if ((isoopen(mode) >= 0 && ++noauto != 0) || // custom
pascal@19825 88 isoopen("bzImage") >= 0 || // SliTaz
pascal@19825 89 isoopen("vmlinuz") >= 0 || // misc
pascal@19899 90 (isoopen("linux") >= 0 && ++isknoppix != 0)) {
pascal@19538 91 magic = kver2ul(isokernel());
pascal@19515 92 break;
pascal@19515 93 }
pascal@19515 94 } while (isoopen("isolinux") >= 0); // Knoppix
pascal@19515 95 for (c = 0, restart = 1; isoreaddir(restart) == 0; restart = 0) {
pascal@19571 96 if (strstr(x->filename, ".gz"))
pascal@19571 97 strcpy(fallback, x->filename);
pascal@19571 98 if (strhead(x->filename, "rootfs")
pascal@19571 99 || c > x->filename[6]) continue;
pascal@19571 100 strcpy(rootfs, x->filename);
pascal@19571 101 c = x->filename[6];
pascal@19515 102 }
pascal@19515 103
pascal@19878 104 strcatb(_cmdline," rw root=/dev/null autologin bootfrom=");
pascal@19515 105 strcat(_cmdline,*iso);
pascal@19515 106 if (magic < 0x20630)
pascal@19515 107 init = ""; // Does not support multiple initramfs
pascal@19515 108
pascal@19825 109 if (noauto) {
pascal@19825 110 char *s;
pascal@19825 111 * (int *) _cmdline = 0;
pascal@19825 112 iso++;
pascal@19825 113 while ((s = *++iso) != NULL) {
pascal@19825 114 if (strhead(s,"initrd="))
pascal@19825 115 strcatb(_cmdline,s);
pascal@19825 116 else if (isoopen(s+7) >= 0)
pascal@19825 117 addinitrd();
pascal@19825 118 }
pascal@19825 119 }
pascal@19825 120 else if (magic > 0) {
pascal@19899 121 char *initrdfilename = fallback;
pascal@19872 122 static const unsigned long initrddesc = 18L;
pascal@19515 123
pascal@19515 124 if (rootfs[0]) {
pascal@19899 125 initrdfilename = rootfs;
pascal@19515 126 if (rootfs[6] != '.' && isoopen("rootfs.gz") >= 0)
pascal@19515 127 addinitrd(); // for loram
pascal@19515 128 }
pascal@19899 129 if (isoopen(initrdfilename) >= 0) {
pascal@19515 130 addinitrd();
pascal@19515 131 }
pascal@19825 132 if (*init && isolseek(&initrddesc) != -1) {
pascal@19872 133 read(x->fd, &x->filemod, 10); // + x->fileofs & x->filesize
pascal@19872 134 magic = x->filemod;
pascal@20473 135 x->fileofs &= 0xFFFFL;
pascal@20454 136 //x->fileofs -= 0xC0L + (x->filesize &= 0xFFFF);
pascal@20458 137 * ((short *) &x->filesize + 1) = 0;
pascal@20454 138 x->fileofs -= 0xC0L + x->filesize;
pascal@19825 139 if (((short *) &x->fileofs)[1] == 0) addinitrd();
pascal@19515 140 else init="";
pascal@19515 141 }
pascal@19515 142 strcat(_cmdline,init);
pascal@19538 143 strcatb(_cmdline,"mode=");
pascal@19515 144 strcat(_cmdline,mode);
pascal@19538 145 strcatb(_cmdline,"magic=");
pascal@19515 146 strcat(_cmdline,ultoa(magic));
pascal@19515 147 }
pascal@19825 148 load_initrds();
pascal@19515 149 if (isknoppix) {
pascal@19825 150 char *s = *iso;
pascal@19825 151 if (s[1] == ':')
pascal@19825 152 s += 2;
pascal@19825 153 for (; *s; s++)
pascal@19515 154 if (*s == '\\') *s = '/';
pascal@19515 155 }
pascal@19571 156 close(x->fd);
pascal@19515 157 boot_kernel();
pascal@19515 158 }
pascal@19515 159
pascal@19515 160 u16 root_dev;
pascal@19515 161 u16 vid_mode;
pascal@19515 162 const char* kernel_name = "bzImage";
pascal@19515 163 const char* initrd_name;
pascal@19515 164 int main(int argc, char *argv[])
pascal@19515 165 {
pascal@19515 166 char *iso = NULL;
pascal@19515 167 argv[0] = progname();
pascal@19515 168 bootiso(argv); // iso ? parsing is /init.exe stuff !
pascal@19515 169
pascal@19515 170 if (argc < 2) {
pascal@19546 171 try_default_args();
pascal@19515 172 dousage:
pascal@20451 173 die("Usage: tazboot [[@commands]|[-f][-b base_himem][kernel=<bzImage>] \
pascal@19538 174 [initrd=<rootfs>[,<rootfs2>...]] [bootfrom=<isofile>] ...]\r\n\n\
pascal@19538 175 Defaults: tazboot kernel=bzImage auto\r\n\n\
pascal@19538 176 Examples for tazboot.cmd:\r\n\n\
pascal@19538 177 bootfrom=\\isos\\slitaz-4.0.iso\r\n\
pascal@19538 178 kernel=boot/bzImage\r\n\
pascal@19538 179 initrd=boot/rootfs4.gz,boot/rootfs3.gz,boot/rootfs2.gz,boot/rootfs1.gz,\\slitaz\\extrafs.gz\r\n\
pascal@19538 180 rw root=/dev/null vga=normal autologin\r\n\n\
pascal@19538 181 kernel=\\slitaz\\elks\r\n\
pascal@19538 182 root=/dev/bda1 ro\r\n");
pascal@19515 183 }
pascal@19546 184 bootiso(argv + 1);
pascal@19546 185 chdirname(*argv);
pascal@19538 186 for (int i=0;;) {
pascal@19546 187 char *s;
pascal@19580 188 next: argv++;
pascal@19546 189 s=*argv;
pascal@19538 190 i++;
pascal@19538 191 if (!s) break;
pascal@19538 192 if (strhead(s,"kernel=") == 0) {
pascal@19825 193 s++;
pascal@19538 194 set_kernel:
pascal@19825 195 s += 6;
pascal@19898 196 set_kernelz:
pascal@19538 197 kernel_name = s;
pascal@19538 198 }
pascal@19538 199 else if (strhead(s,"image=") == 0) {
pascal@19538 200 goto set_kernel;
pascal@19538 201 }
pascal@19538 202 else if (strhead(s,"initrd=") == 0) {
pascal@19538 203 s += 7;
pascal@19538 204 initrd_name = s;
pascal@19538 205 }
pascal@19538 206 else if (strhead(s,"bootfrom=") == 0) {
pascal@19538 207 s += 9;
pascal@19538 208 set_iso:
pascal@19538 209 iso = s;
pascal@19538 210 }
pascal@19538 211 else if (strhead(s,"iso=") == 0) {
pascal@19538 212 s += 4;
pascal@19538 213 goto set_iso;
pascal@19538 214 }
pascal@19515 215 else if(strhead(s,"vga=") == 0) {
pascal@19538 216 s += 4;
pascal@19538 217 vid_mode = strtol(s); // support normal, extended & ask
pascal@19515 218 }
pascal@19580 219 else switch (*(u16 *)s|0x2002) {
pascal@19580 220 case 0x662F: // -F /f
pascal@19580 221 skip_alloc++;
pascal@19580 222 goto next;
pascal@19580 223 case 0x652F: // -E /e
pascal@19580 224 argv++;
pascal@19580 225 topmem = strtol(*argv);
pascal@19580 226 goto next;
pascal@19580 227 case 0x622F: // -B /b
pascal@19580 228 argv++;
pascal@19580 229 base_himem = strtol(*argv);
pascal@19580 230 goto next;
pascal@19580 231 default:
pascal@19580 232 if(i == 1 && fileattr(s) != -1) {
pascal@19898 233 goto set_kernelz;
pascal@19538 234 }
pascal@19515 235 else {
pascal@19515 236 if(strhead(s,"root=") == 0) {
pascal@19538 237 s += 5;
pascal@19538 238 root_dev = strtol(s);
pascal@19515 239 }
pascal@19515 240 if(strhead(s,"mem=") == 0) {
pascal@19538 241 s += 4;
pascal@19538 242 topmem = strtol(s);
pascal@19515 243 }
pascal@19538 244 strcatb(_cmdline,*argv);
pascal@19580 245 }}
pascal@19515 246 }
pascal@19515 247 if (iso && isoreset(iso) >= 0) {
pascal@19515 248 char *s = (char *) initrd_name;
pascal@19515 249 if (isoopen((char *) kernel_name) >= 0) {
pascal@19515 250 isokernel();
pascal@19515 251 }
pascal@19515 252 if (s) {
pascal@19515 253 while (*s) {
pascal@19515 254 char *p, c;
pascal@19515 255 for (p = s; *s && *s != ','; s++);
pascal@19515 256 c = *s; *s = 0;
pascal@19515 257 if (isoopen(p) >= 0) {
pascal@19515 258 addinitrd();
pascal@19515 259 }
pascal@19515 260 *s = c;
pascal@19515 261 if (c) s++;
pascal@19515 262 }
pascal@19515 263 load_initrds();
pascal@19515 264 }
pascal@19515 265 }
pascal@19515 266 else {
pascal@19515 267 load_kernel();
pascal@19515 268 load_initrd();
pascal@19515 269 }
pascal@19515 270 boot_kernel();
pascal@19515 271 return _AX;
pascal@19515 272 }