AMD64 - Fix native-built sys/boot install
[dragonfly.git] / sys / boot / pc32 / boot2 / boot2.c
CommitLineData
cacaceec
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1/*
2 * Copyright (c) 2003,2004 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
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34 * Copyright (c) 1998 Robert Nordier
35 * All rights reserved.
36 *
37 * Redistribution and use in source and binary forms are freely
38 * permitted provided that the above copyright notice and this
39 * paragraph and the following disclaimer are duplicated in all
40 * such forms.
41 *
42 * This software is provided "AS IS" and without any express or
43 * implied warranties, including, without limitation, the implied
44 * warranties of merchantability and fitness for a particular
45 * purpose.
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46 *
47 * $FreeBSD: src/sys/boot/i386/boot2/boot2.c,v 1.64 2003/08/25 23:28:31 obrien Exp $
7580e818 48 * $DragonFly: src/sys/boot/pc32/boot2/boot2.c,v 1.18 2008/09/13 11:45:45 corecode Exp $
984263bc 49 */
7580e818 50
79b4bbd6 51#define AOUT_H_FORCE32
984263bc 52#include <sys/param.h>
6080181b
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53#ifdef DISKLABEL64
54#include <sys/disklabel64.h>
55#else
2b961883 56#include <sys/disklabel32.h>
6080181b 57#endif
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58#include <sys/diskslice.h>
59#include <sys/diskmbr.h>
ba0cc1ab 60#include <sys/dtype.h>
984263bc
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61#include <sys/dirent.h>
62#include <machine/bootinfo.h>
63#include <machine/elf.h>
64
984263bc
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65#include <stdarg.h>
66
67#include <a.out.h>
68
69#include <btxv86.h>
70
6080181b
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71#ifdef DISKLABEL64
72#include "boot2_64.h"
73#else
74#include "boot2_32.h"
75#endif
d64b2e33 76#include "boot2.h"
984263bc 77#include "lib.h"
409cbc03 78#include "../bootasm.h"
984263bc 79
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80#define SECOND 18 /* Circa that many ticks in a second. */
81
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82#define RBX_ASKNAME 0x0 /* -a */
83#define RBX_SINGLE 0x1 /* -s */
84#define RBX_DFLTROOT 0x5 /* -r */
85#define RBX_KDB 0x6 /* -d */
86#define RBX_CONFIG 0xa /* -c */
87#define RBX_VERBOSE 0xb /* -v */
88#define RBX_SERIAL 0xc /* -h */
89#define RBX_CDROM 0xd /* -C */
90#define RBX_GDB 0xf /* -g */
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91#define RBX_MUTE 0x10 /* -m */
92#define RBX_PAUSE 0x12 /* -p */
93#define RBX_NOINTR 0x1c /* -n */
badbfe61 94#define RBX_VIDEO 0x1d /* -V */
984263bc 95#define RBX_PROBEKBD 0x1e /* -P */
5ee58eed 96/* 0x1f is reserved for the historical RB_BOOTINFO option */
984263bc 97
38e10dff 98#define RBF_MUTE (1 << RBX_MUTE)
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99#define RBF_SERIAL (1 << RBX_SERIAL)
100#define RBF_VIDEO (1 << RBX_VIDEO)
101
50a1695f 102/* pass: -a, -s, -r, -d, -c, -v, -h, -C, -g, -m, -p, -V */
5ee58eed 103#define RBX_MASK 0x2005ffff
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104
105#define PATH_CONFIG "/boot.config"
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106#define PATH_BOOT3 "/boot/loader" /* /boot in root */
107#define PATH_BOOT3_ALT "/loader" /* /boot partition */
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108#define PATH_KERNEL "/kernel"
109
5ee58eed 110#define NDEV 3
984263bc
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111#define MEM_BASE 0x12
112#define MEM_EXT 0x15
113#define V86_CY(x) ((x) & 1)
114#define V86_ZR(x) ((x) & 0x40)
115
116#define DRV_HARD 0x80
117#define DRV_MASK 0x7f
118
119#define TYPE_AD 0
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120#define TYPE_DA 1
121#define TYPE_MAXHARD TYPE_DA
122#define TYPE_FD 2
984263bc 123
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124#define NOPT 12
125
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126#define INVALID_S "Bad %s\n"
127
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128extern uint32_t _end;
129
badbfe61 130static const char optstr[NOPT] = { "VhaCgmnPprsv" };
984263bc 131static const unsigned char flags[NOPT] = {
badbfe61 132 RBX_VIDEO,
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133 RBX_SERIAL,
134 RBX_ASKNAME,
135 RBX_CDROM,
984263bc 136 RBX_GDB,
5ee58eed 137 RBX_MUTE,
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138 RBX_NOINTR,
139 RBX_PROBEKBD,
5ee58eed 140 RBX_PAUSE,
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141 RBX_DFLTROOT,
142 RBX_SINGLE,
143 RBX_VERBOSE
144};
145
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146static const char *const dev_nm[NDEV] = {"ad", "da", "fd"};
147static const unsigned char dev_maj[NDEV] = {30, 4, 2};
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148
149static struct dsk {
150 unsigned drive;
151 unsigned type;
152 unsigned unit;
153 unsigned slice;
154 unsigned part;
155 unsigned start;
156 int init;
984263bc 157} dsk;
d64b2e33 158
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159static char cmd[512];
160static char kname[1024];
d64b2e33 161static uint32_t opts = RBF_VIDEO;
984263bc 162static struct bootinfo bootinfo;
984263bc 163
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164/*
165 * boot2 encapsulated ABI elements provided to *fsread.c
166 *
167 * NOTE: boot2_dmadat is extended by per-filesystem APIs
168 */
169uint32_t fs_off;
170int ls;
171struct boot2_dmadat *boot2_dmadat;
7580e818 172
984263bc 173void exit(int);
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174static void load(void);
175static int parse(void);
d64b2e33
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176static int dskprobe(void);
177static int xfsread(boot2_ino_t, void *, size_t);
5ee58eed 178static uint32_t memsize(void);
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179static int drvread(void *, unsigned, unsigned);
180static int keyhit(unsigned);
50a1695f 181static void xputc(int);
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182static int xgetc(int);
183static int getc(int);
184
d64b2e33 185void
5ee58eed 186memcpy(void *d, const void *s, int len)
984263bc 187{
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188 char *dd = d;
189 const char *ss = s;
984263bc 190
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191#if 0
192 if (dd < ss) {
193 while (--len >= 0)
194 *dd++ = *ss++;
195 } else {
196#endif
197 while (--len >= 0)
198 dd[len] = ss[len];
199#if 0
200 }
201#endif
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202}
203
d64b2e33 204int
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205strcmp(const char *s1, const char *s2)
206{
d64b2e33
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207 for (; *s1 == *s2 && *s1; s1++, s2++)
208 ;
209 return ((int)((unsigned char)*s1 - (unsigned char)*s2));
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210}
211
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212#if defined(UFS) && defined(HAMMERFS)
213
214const struct boot2_fsapi *fsapi;
215
216#elif defined(UFS)
217
218#define fsapi (&boot2_ufs_api)
219
220#elif defined(HAMMERFS)
221
222#define fsapi (&boot2_hammer_api)
223
7580e818 224#endif
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225
226static int
d64b2e33 227xfsread(boot2_ino_t inode, void *buf, size_t nbyte)
984263bc 228{
d64b2e33 229 if ((size_t)fsapi->fsread(inode, buf, nbyte) != nbyte) {
4e06dda7 230 printf(INVALID_S, "format");
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231 return -1;
232 }
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233 return 0;
234}
235
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236static inline uint32_t
237memsize(void)
984263bc 238{
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239 v86.addr = MEM_EXT;
240 v86.eax = 0x8800;
241 v86int();
242 return v86.eax;
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243}
244
245static inline void
5ee58eed 246getstr(void)
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247{
248 char *s;
249 int c;
250
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251 s = cmd;
252 for (;;) {
253 switch (c = xgetc(0)) {
984263bc
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254 case 0:
255 break;
984263bc 256 case '\177':
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257 case '\b':
258 if (s > cmd) {
984263bc 259 s--;
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260 printf("\b \b");
261 }
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262 break;
263 case '\n':
5ee58eed 264 case '\r':
984263bc 265 *s = 0;
5ee58eed 266 return;
984263bc 267 default:
5ee58eed 268 if (s - cmd < sizeof(cmd) - 1)
984263bc 269 *s++ = c;
984263bc 270 putchar(c);
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271 }
272 }
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273}
274
275static inline void
276putc(int c)
277{
278 v86.addr = 0x10;
279 v86.eax = 0xe00 | (c & 0xff);
280 v86.ebx = 0x7;
281 v86int();
282}
283
284int
285main(void)
286{
5ee58eed 287 int autoboot;
d64b2e33 288 boot2_ino_t ino;
984263bc 289
d64b2e33
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290 boot2_dmadat =
291 (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base);
984263bc 292 v86.ctl = V86_FLAGS;
cacaceec 293 dsk.drive = *(uint8_t *)PTOV(MEM_BTX_USR_ARG);
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294 dsk.type = dsk.drive & DRV_HARD ? TYPE_AD : TYPE_FD;
295 dsk.unit = dsk.drive & DRV_MASK;
cacaceec 296 dsk.slice = *(uint8_t *)PTOV(MEM_BTX_USR_ARG + 1) + 1;
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297 bootinfo.bi_version = BOOTINFO_VERSION;
298 bootinfo.bi_size = sizeof(bootinfo);
299 bootinfo.bi_basemem = 0; /* XXX will be filled by loader or kernel */
5ee58eed 300 bootinfo.bi_extmem = memsize();
984263bc 301 bootinfo.bi_memsizes_valid++;
5ee58eed 302
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303 autoboot = 1;
304
d64b2e33
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305 /*
306 * Probe the default disk and process the configuration file if
307 * successful.
308 */
309 if (dskprobe() == 0) {
310 if ((ino = fsapi->fslookup(PATH_CONFIG)))
311 fsapi->fsread(ino, cmd, sizeof(cmd));
312 }
5ee58eed 313
d64b2e33
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314 /*
315 * Parse config file if present. parse() will re-probe if necessary.
316 */
badbfe61 317 if (cmd[0]) {
984263bc 318 printf("%s: %s", PATH_CONFIG, cmd);
5ee58eed 319 if (parse())
984263bc 320 autoboot = 0;
5ee58eed 321 /* Do not process this command twice */
984263bc
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322 *cmd = 0;
323 }
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324
325 /*
38e10dff
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326 * Setup our (serial) console after processing the config file. If
327 * the initialization fails, don't try to use the serial port. This
328 * can happen if the serial port is unmaped (happens on new laptops a lot).
badbfe61 329 */
38e10dff 330 if ((opts & (RBF_MUTE|RBF_SERIAL|RBF_VIDEO)) == 0)
badbfe61 331 opts |= RBF_SERIAL|RBF_VIDEO;
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332 if (opts & RBF_SERIAL) {
333 if (sio_init())
334 opts = RBF_VIDEO;
335 }
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336
337
338 /*
5ee58eed
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339 * Try to exec stage 3 boot loader. If interrupted by a keypress,
340 * or in case of failure, try to load a kernel directly instead.
79dc5fc6
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341 *
342 * We have to try boot /boot/loader and /loader to support booting
343 * from a /boot partition instead of a root partition.
5ee58eed 344 */
984263bc 345 if (autoboot && !*kname) {
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346 memcpy(kname, PATH_BOOT3, sizeof(PATH_BOOT3));
347 if (!keyhit(3*SECOND)) {
348 load();
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349 memcpy(kname, PATH_BOOT3_ALT, sizeof(PATH_BOOT3_ALT));
350 load();
984263bc 351 memcpy(kname, PATH_KERNEL, sizeof(PATH_KERNEL));
5ee58eed 352 }
984263bc 353 }
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354
355 /* Present the user with the boot2 prompt. */
356
984263bc 357 for (;;) {
38e10dff
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358 printf("\nDragonFly boot\n"
359 "%u:%s(%u,%c)%s: ",
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360 dsk.drive & DRV_MASK, dev_nm[dsk.type], dsk.unit,
361 'a' + dsk.part, kname);
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362 if (!autoboot || keyhit(5*SECOND))
363 getstr();
984263bc
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364 else
365 putchar('\n');
366 autoboot = 0;
d561b492 367 if (parse())
5ee58eed 368 putchar('\a');
984263bc 369 else
5ee58eed 370 load();
984263bc
MD
371 }
372}
373
374/* XXX - Needed for btxld to link the boot2 binary; do not remove. */
375void
376exit(int x)
377{
378}
379
380static void
5ee58eed 381load(void)
984263bc
MD
382{
383 union {
384 struct exec ex;
385 Elf32_Ehdr eh;
386 } hdr;
387 Elf32_Phdr ep[2];
388 Elf32_Shdr es[2];
389 caddr_t p;
d64b2e33 390 boot2_ino_t ino;
984263bc
MD
391 uint32_t addr, x;
392 int fmt, i, j;
393
d64b2e33 394 if (!(ino = fsapi->fslookup(kname))) {
984263bc 395 if (!ls)
5ee58eed 396 printf("No %s\n", kname);
984263bc
MD
397 return;
398 }
399 if (xfsread(ino, &hdr, sizeof(hdr)))
400 return;
401 if (N_GETMAGIC(hdr.ex) == ZMAGIC)
402 fmt = 0;
403 else if (IS_ELF(hdr.eh))
404 fmt = 1;
405 else {
4e06dda7 406 printf(INVALID_S, "format");
984263bc
MD
407 return;
408 }
409 if (fmt == 0) {
410 addr = hdr.ex.a_entry & 0xffffff;
411 p = PTOV(addr);
412 fs_off = PAGE_SIZE;
413 if (xfsread(ino, p, hdr.ex.a_text))
414 return;
415 p += roundup2(hdr.ex.a_text, PAGE_SIZE);
416 if (xfsread(ino, p, hdr.ex.a_data))
417 return;
418 p += hdr.ex.a_data + roundup2(hdr.ex.a_bss, PAGE_SIZE);
419 bootinfo.bi_symtab = VTOP(p);
420 memcpy(p, &hdr.ex.a_syms, sizeof(hdr.ex.a_syms));
421 p += sizeof(hdr.ex.a_syms);
422 if (hdr.ex.a_syms) {
423 if (xfsread(ino, p, hdr.ex.a_syms))
424 return;
425 p += hdr.ex.a_syms;
426 if (xfsread(ino, p, sizeof(int)))
427 return;
428 x = *(uint32_t *)p;
429 p += sizeof(int);
430 x -= sizeof(int);
431 if (xfsread(ino, p, x))
432 return;
433 p += x;
434 }
435 } else {
436 fs_off = hdr.eh.e_phoff;
437 for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) {
438 if (xfsread(ino, ep + j, sizeof(ep[0])))
439 return;
440 if (ep[j].p_type == PT_LOAD)
441 j++;
442 }
443 for (i = 0; i < 2; i++) {
444 p = PTOV(ep[i].p_paddr & 0xffffff);
445 fs_off = ep[i].p_offset;
446 if (xfsread(ino, p, ep[i].p_filesz))
447 return;
448 }
449 p += roundup2(ep[1].p_memsz, PAGE_SIZE);
450 bootinfo.bi_symtab = VTOP(p);
451 if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) {
452 fs_off = hdr.eh.e_shoff + sizeof(es[0]) *
453 (hdr.eh.e_shstrndx + 1);
454 if (xfsread(ino, &es, sizeof(es)))
455 return;
456 for (i = 0; i < 2; i++) {
457 memcpy(p, &es[i].sh_size, sizeof(es[i].sh_size));
458 p += sizeof(es[i].sh_size);
459 fs_off = es[i].sh_offset;
460 if (xfsread(ino, p, es[i].sh_size))
461 return;
462 p += es[i].sh_size;
463 }
464 }
465 addr = hdr.eh.e_entry & 0xffffff;
466 }
467 bootinfo.bi_esymtab = VTOP(p);
5ee58eed 468 bootinfo.bi_kernelname = VTOP(kname);
984263bc 469 bootinfo.bi_bios_dev = dsk.drive;
5ee58eed 470 __exec((caddr_t)addr, opts & RBX_MASK,
984263bc
MD
471 MAKEBOOTDEV(dev_maj[dsk.type], 0, dsk.slice, dsk.unit, dsk.part),
472 0, 0, 0, VTOP(&bootinfo));
473}
474
475static int
d64b2e33 476parse(void)
984263bc 477{
5ee58eed 478 char *arg = cmd;
984263bc 479 char *p, *q;
5ee58eed
MD
480 unsigned int drv;
481 int c, i;
984263bc
MD
482
483 while ((c = *arg++)) {
484 if (c == ' ' || c == '\t' || c == '\n')
485 continue;
badbfe61
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486 for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++)
487 ;
984263bc
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488 if (*p)
489 *p++ = 0;
490 if (c == '-') {
491 while ((c = *arg++)) {
badbfe61
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492 for (i = NOPT - 1; i >= 0; --i) {
493 if (optstr[i] == c) {
494 opts ^= 1 << flags[i];
495 goto ok;
496 }
497 }
498 return(-1);
499 ok: ; /* ugly but save space */
984263bc 500 }
badbfe61 501 if (opts & (1 << RBX_PROBEKBD)) {
984263bc 502 i = *(uint8_t *)PTOV(0x496) & 0x10;
2d7f6790
MD
503 if (!i) {
504 printf("NO KB\n");
badbfe61 505 opts |= RBF_VIDEO | RBF_SERIAL;
2d7f6790 506 }
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507 opts &= ~(1 << RBX_PROBEKBD);
508 }
984263bc
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509 } else {
510 for (q = arg--; *q && *q != '('; q++);
511 if (*q) {
512 drv = -1;
513 if (arg[1] == ':') {
984263bc 514 drv = *arg - '0';
5ee58eed
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515 if (drv > 9)
516 return (-1);
984263bc
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517 arg += 2;
518 }
519 if (q - arg != 2)
520 return -1;
521 for (i = 0; arg[0] != dev_nm[i][0] ||
522 arg[1] != dev_nm[i][1]; i++)
523 if (i == NDEV - 1)
524 return -1;
525 dsk.type = i;
526 arg += 3;
984263bc 527 dsk.unit = *arg - '0';
5ee58eed
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528 if (arg[1] != ',' || dsk.unit > 9)
529 return -1;
984263bc
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530 arg += 2;
531 dsk.slice = WHOLE_DISK_SLICE;
532 if (arg[1] == ',') {
5ee58eed
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533 dsk.slice = *arg - '0' + 1;
534 if (dsk.slice > NDOSPART)
984263bc 535 return -1;
984263bc
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536 arg += 2;
537 }
5ee58eed 538 if (arg[1] != ')')
984263bc
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539 return -1;
540 dsk.part = *arg - 'a';
5ee58eed
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541 if (dsk.part > 7)
542 return (-1);
984263bc
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543 arg += 2;
544 if (drv == -1)
545 drv = dsk.unit;
5ee58eed
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546 dsk.drive = (dsk.type <= TYPE_MAXHARD
547 ? DRV_HARD : 0) + drv;
984263bc
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548 }
549 if ((i = p - arg - !*(p - 1))) {
5ee58eed 550 if ((size_t)i >= sizeof(kname))
984263bc
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551 return -1;
552 memcpy(kname, arg, i + 1);
553 }
554 }
555 arg = p;
556 }
d64b2e33 557 return dskprobe();
984263bc
MD
558}
559
984263bc 560static int
d64b2e33 561dskprobe(void)
984263bc 562{
984263bc 563 struct dos_partition *dp;
6080181b
SS
564#ifdef DISKLABEL64
565 struct disklabel64 *d;
566#else
2b961883 567 struct disklabel32 *d;
6080181b 568#endif
5ee58eed 569 char *sec;
984263bc
MD
570 unsigned sl, i;
571
d64b2e33
MD
572 /*
573 * Probe slice table
574 */
575 sec = boot2_dmadat->secbuf;
576 dsk.start = 0;
577 if (drvread(sec, DOSBBSECTOR, 1))
578 return -1;
579 dp = (void *)(sec + DOSPARTOFF);
580 sl = dsk.slice;
581 if (sl < BASE_SLICE) {
582 for (i = 0; i < NDOSPART; i++)
583 if (dp[i].dp_typ == DOSPTYP_386BSD &&
584 (dp[i].dp_flag & 0x80 || sl < BASE_SLICE)) {
585 sl = BASE_SLICE + i;
586 if (dp[i].dp_flag & 0x80 ||
587 dsk.slice == COMPATIBILITY_SLICE)
588 break;
984263bc 589 }
d64b2e33
MD
590 if (dsk.slice == WHOLE_DISK_SLICE)
591 dsk.slice = sl;
592 }
593 if (sl != WHOLE_DISK_SLICE) {
594 if (sl != COMPATIBILITY_SLICE)
595 dp += sl - BASE_SLICE;
596 if (dp->dp_typ != DOSPTYP_386BSD) {
597 printf(INVALID_S, "slice");
598 return -1;
984263bc 599 }
d64b2e33
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600 dsk.start = dp->dp_start;
601 }
602
603 /*
604 * Probe label and partition table
605 */
6080181b 606#ifdef DISKLABEL64
d64b2e33
MD
607 if (drvread(sec, dsk.start, (sizeof(struct disklabel64) + 511) / 512))
608 return -1;
609 d = (void *)sec;
610 if (d->d_magic != DISKMAGIC64) {
611 printf(INVALID_S, "label");
612 return -1;
613 } else {
614 if (dsk.part >= d->d_npartitions || d->d_partitions[dsk.part].p_bsize == 0) {
615 printf(INVALID_S, "partition");
6080181b 616 return -1;
6080181b 617 }
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618 dsk.start += d->d_partitions[dsk.part].p_boffset / 512;
619 }
6080181b 620#else
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621 if (drvread(sec, dsk.start + LABELSECTOR32, 1))
622 return -1;
623 d = (void *)(sec + LABELOFFSET32);
624 if (d->d_magic != DISKMAGIC32 || d->d_magic2 != DISKMAGIC32) {
625 if (dsk.part != RAW_PART) {
626 printf(INVALID_S, "label");
627 return -1;
628 }
629 } else {
630 if (!dsk.init) {
631 if (d->d_type == DTYPE_SCSI)
632 dsk.type = TYPE_DA;
633 dsk.init++;
984263bc 634 }
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635 if (dsk.part >= d->d_npartitions ||
636 !d->d_partitions[dsk.part].p_size) {
637 printf(INVALID_S, "partition");
638 return -1;
639 }
640 dsk.start += d->d_partitions[dsk.part].p_offset;
641 dsk.start -= d->d_partitions[RAW_PART].p_offset;
642 }
6080181b 643#endif
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644 /*
645 * Probe filesystem
646 */
647#if defined(UFS) && defined(HAMMERFS)
648 if (boot2_hammer_api.fsinit() == 0) {
649 fsapi = &boot2_hammer_api;
650 } else if (boot2_ufs_api.fsinit() == 0) {
651 fsapi = &boot2_ufs_api;
652 } else {
653 printf("fs probe failed\n");
654 fsapi = &boot2_ufs_api;
655 return -1;
984263bc 656 }
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657 return 0;
658#else
659 return fsapi->fsinit();
660#endif
661}
662
663
664/*
665 * Read from the probed disk. We have established the slice and partition
666 * base sector.
667 */
668int
669dskread(void *buf, unsigned lba, unsigned nblk)
670{
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671 return drvread(buf, dsk.start + lba, nblk);
672}
673
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674/*
675 * boot encapsulated ABI
676 */
677void
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678printf(const char *fmt,...)
679{
5ee58eed 680 va_list ap;
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681 char buf[10];
682 char *s;
5ee58eed 683 unsigned u;
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684 int c;
685
5ee58eed 686 va_start(ap, fmt);
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687 while ((c = *fmt++)) {
688 if (c == '%') {
689 c = *fmt++;
690 switch (c) {
691 case 'c':
5ee58eed 692 putchar(va_arg(ap, int));
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693 continue;
694 case 's':
5ee58eed 695 for (s = va_arg(ap, char *); *s; s++)
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696 putchar(*s);
697 continue;
698 case 'u':
5ee58eed 699 u = va_arg(ap, unsigned);
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700 s = buf;
701 do
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702 *s++ = '0' + u % 10U;
703 while (u /= 10U);
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704 while (--s >= buf)
705 putchar(*s);
706 continue;
707 }
708 }
709 putchar(c);
710 }
5ee58eed 711 va_end(ap);
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712}
713
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714/*
715 * boot encapsulated ABI
716 */
717void
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718putchar(int c)
719{
720 if (c == '\n')
721 xputc('\r');
5ee58eed 722 xputc(c);
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723}
724
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725/*
726 * boot encapsulated ABI
727 */
728int
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729drvread(void *buf, unsigned lba, unsigned nblk)
730{
50a1695f 731 static unsigned c = 0x2d5c7c2f; /* twiddle */
984263bc 732
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733 c = (c << 8) | (c >> 24);
734 xputc(c);
735 xputc('\b');
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736 v86.ctl = V86_ADDR | V86_CALLF | V86_FLAGS;
737 v86.addr = XREADORG; /* call to xread in boot1 */
738 v86.es = VTOPSEG(buf);
739 v86.eax = lba;
740 v86.ebx = VTOPOFF(buf);
741 v86.ecx = lba >> 16;
742 v86.edx = nblk << 8 | dsk.drive;
743 v86int();
744 v86.ctl = V86_FLAGS;
745 if (V86_CY(v86.efl)) {
5ee58eed 746 printf("error %u lba %u\n", v86.eax >> 8 & 0xff, lba);
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747 return -1;
748 }
749 return 0;
750}
751
752static int
753keyhit(unsigned ticks)
754{
755 uint32_t t0, t1;
756
757 if (opts & 1 << RBX_NOINTR)
758 return 0;
759 t0 = 0;
760 for (;;) {
761 if (xgetc(1))
762 return 1;
763 t1 = *(uint32_t *)PTOV(0x46c);
764 if (!t0)
765 t0 = t1;
766 if (t1 < t0 || t1 >= t0 + ticks)
767 return 0;
768 }
769}
770
50a1695f 771static void
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772xputc(int c)
773{
badbfe61 774 if (opts & RBF_VIDEO)
984263bc 775 putc(c);
badbfe61 776 if (opts & RBF_SERIAL)
984263bc 777 sio_putc(c);
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778}
779
780static int
781xgetc(int fn)
782{
783 if (opts & 1 << RBX_NOINTR)
784 return 0;
785 for (;;) {
badbfe61 786 if ((opts & RBF_VIDEO) && getc(1))
984263bc 787 return fn ? 1 : getc(0);
badbfe61 788 if ((opts & RBF_SERIAL) && sio_ischar())
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789 return fn ? 1 : sio_getc();
790 if (fn)
791 return 0;
792 }
793}
794
795static int
796getc(int fn)
797{
798 v86.addr = 0x16;
799 v86.eax = fn << 8;
800 v86int();
801 return fn == 0 ? v86.eax & 0xff : !V86_ZR(v86.efl);
802}