b15e543bf5
gptzfsboot. I got the segment and offset fields reversed in the structure, but I also succeeded in crossing the assignments so the actual EDD packet ended up correct. MFC after: 1 week
1165 lines
24 KiB
C
1165 lines
24 KiB
C
/*-
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* Copyright (c) 1998 Robert Nordier
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are freely
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* permitted provided that the above copyright notice and this
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* paragraph and the following disclaimer are duplicated in all
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* such forms.
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*
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* This software is provided "AS IS" and without any express or
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* implied warranties, including, without limitation, the implied
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* warranties of merchantability and fitness for a particular
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* purpose.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/errno.h>
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#include <sys/diskmbr.h>
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#ifdef GPT
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#include <sys/gpt.h>
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#endif
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#include <sys/reboot.h>
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#include <sys/queue.h>
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#include <machine/bootinfo.h>
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#include <machine/elf.h>
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#include <machine/pc/bios.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <a.out.h>
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#include <btxv86.h>
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#ifndef GPT
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#include "zfsboot.h"
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#endif
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#include "lib.h"
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#define IO_KEYBOARD 1
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#define IO_SERIAL 2
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#define SECOND 18 /* Circa that many ticks in a second. */
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#define RBX_ASKNAME 0x0 /* -a */
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#define RBX_SINGLE 0x1 /* -s */
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/* 0x2 is reserved for log2(RB_NOSYNC). */
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/* 0x3 is reserved for log2(RB_HALT). */
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/* 0x4 is reserved for log2(RB_INITNAME). */
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#define RBX_DFLTROOT 0x5 /* -r */
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#define RBX_KDB 0x6 /* -d */
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/* 0x7 is reserved for log2(RB_RDONLY). */
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/* 0x8 is reserved for log2(RB_DUMP). */
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/* 0x9 is reserved for log2(RB_MINIROOT). */
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#define RBX_CONFIG 0xa /* -c */
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#define RBX_VERBOSE 0xb /* -v */
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#define RBX_SERIAL 0xc /* -h */
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#define RBX_CDROM 0xd /* -C */
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/* 0xe is reserved for log2(RB_POWEROFF). */
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#define RBX_GDB 0xf /* -g */
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#define RBX_MUTE 0x10 /* -m */
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/* 0x11 is reserved for log2(RB_SELFTEST). */
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/* 0x12 is reserved for boot programs. */
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/* 0x13 is reserved for boot programs. */
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#define RBX_PAUSE 0x14 /* -p */
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#define RBX_QUIET 0x15 /* -q */
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#define RBX_NOINTR 0x1c /* -n */
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/* 0x1d is reserved for log2(RB_MULTIPLE) and is just misnamed here. */
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#define RBX_DUAL 0x1d /* -D */
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/* 0x1f is reserved for log2(RB_BOOTINFO). */
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/* pass: -a, -s, -r, -d, -c, -v, -h, -C, -g, -m, -p, -D */
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#define RBX_MASK (OPT_SET(RBX_ASKNAME) | OPT_SET(RBX_SINGLE) | \
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OPT_SET(RBX_DFLTROOT) | OPT_SET(RBX_KDB ) | \
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OPT_SET(RBX_CONFIG) | OPT_SET(RBX_VERBOSE) | \
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OPT_SET(RBX_SERIAL) | OPT_SET(RBX_CDROM) | \
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OPT_SET(RBX_GDB ) | OPT_SET(RBX_MUTE) | \
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OPT_SET(RBX_PAUSE) | OPT_SET(RBX_DUAL))
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/* Hint to loader that we came from ZFS */
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#define KARGS_FLAGS_ZFS 0x4
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#define PATH_CONFIG "/boot.config"
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#define PATH_BOOT3 "/boot/zfsloader"
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#define PATH_KERNEL "/boot/kernel/kernel"
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#define ARGS 0x900
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#define NOPT 14
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#define NDEV 3
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#define V86_CY(x) ((x) & 1)
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#define V86_ZR(x) ((x) & 0x40)
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#define DRV_HARD 0x80
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#define DRV_MASK 0x7f
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#define TYPE_AD 0
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#define TYPE_DA 1
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#define TYPE_MAXHARD TYPE_DA
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#define TYPE_FD 2
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#define OPT_SET(opt) (1 << (opt))
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#define OPT_CHECK(opt) ((opts) & OPT_SET(opt))
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extern uint32_t _end;
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#ifdef GPT
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static const uuid_t freebsd_zfs_uuid = GPT_ENT_TYPE_FREEBSD_ZFS;
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#endif
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static const char optstr[NOPT] = "DhaCcdgmnpqrsv"; /* Also 'P', 'S' */
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static const unsigned char flags[NOPT] = {
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RBX_DUAL,
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RBX_SERIAL,
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RBX_ASKNAME,
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RBX_CDROM,
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RBX_CONFIG,
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RBX_KDB,
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RBX_GDB,
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RBX_MUTE,
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RBX_NOINTR,
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RBX_PAUSE,
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RBX_QUIET,
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RBX_DFLTROOT,
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RBX_SINGLE,
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RBX_VERBOSE
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};
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static const char *const dev_nm[NDEV] = {"ad", "da", "fd"};
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static const unsigned char dev_maj[NDEV] = {30, 4, 2};
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struct dsk {
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unsigned drive;
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unsigned type;
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unsigned unit;
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unsigned slice;
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unsigned part;
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int init;
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daddr_t start;
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};
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static char cmd[512];
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static char kname[1024];
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static uint32_t opts;
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static int comspeed = SIOSPD;
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static struct bootinfo bootinfo;
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static uint32_t bootdev;
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static uint8_t ioctrl = IO_KEYBOARD;
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vm_offset_t high_heap_base;
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uint32_t bios_basemem, bios_extmem, high_heap_size;
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static struct bios_smap smap;
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/*
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* The minimum amount of memory to reserve in bios_extmem for the heap.
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*/
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#define HEAP_MIN (3 * 1024 * 1024)
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static char *heap_next;
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static char *heap_end;
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/* Buffers that must not span a 64k boundary. */
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#define READ_BUF_SIZE 8192
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struct dmadat {
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char rdbuf[READ_BUF_SIZE]; /* for reading large things */
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char secbuf[READ_BUF_SIZE]; /* for MBR/disklabel */
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};
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static struct dmadat *dmadat;
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void exit(int);
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static void load(void);
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static int parse(void);
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static void printf(const char *,...);
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static void putchar(int);
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static void bios_getmem(void);
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static int drvread(struct dsk *, void *, daddr_t, unsigned);
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static int keyhit(unsigned);
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static int xputc(int);
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static int xgetc(int);
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static int getc(int);
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static void memcpy(void *, const void *, int);
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static void
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memcpy(void *dst, const void *src, int len)
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{
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const char *s = src;
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char *d = dst;
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while (len--)
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*d++ = *s++;
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}
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static void
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strcpy(char *dst, const char *src)
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{
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while (*src)
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*dst++ = *src++;
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*dst++ = 0;
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}
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static void
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strcat(char *dst, const char *src)
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{
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while (*dst)
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dst++;
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while (*src)
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*dst++ = *src++;
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*dst++ = 0;
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}
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static int
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strcmp(const char *s1, const char *s2)
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{
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for (; *s1 == *s2 && *s1; s1++, s2++);
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return (unsigned char)*s1 - (unsigned char)*s2;
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}
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static const char *
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strchr(const char *s, char ch)
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{
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for (; *s; s++)
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if (*s == ch)
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return s;
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return 0;
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}
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static int
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memcmp(const void *p1, const void *p2, size_t n)
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{
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const char *s1 = (const char *) p1;
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const char *s2 = (const char *) p2;
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for (; n > 0 && *s1 == *s2; s1++, s2++, n--);
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if (n)
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return (unsigned char)*s1 - (unsigned char)*s2;
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else
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return 0;
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}
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static void
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memset(void *p, char val, size_t n)
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{
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char *s = (char *) p;
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while (n--)
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*s++ = val;
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}
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static void *
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malloc(size_t n)
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{
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char *p = heap_next;
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if (p + n > heap_end) {
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printf("malloc failure\n");
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for (;;)
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;
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return 0;
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}
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heap_next += n;
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return p;
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}
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static size_t
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strlen(const char *s)
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{
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size_t len = 0;
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while (*s++)
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len++;
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return len;
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}
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static char *
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strdup(const char *s)
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{
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char *p = malloc(strlen(s) + 1);
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strcpy(p, s);
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return p;
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}
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#include "zfsimpl.c"
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/*
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* Read from a dnode (which must be from a ZPL filesystem).
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*/
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static int
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zfs_read(spa_t *spa, const dnode_phys_t *dnode, off_t *offp, void *start, size_t size)
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{
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const znode_phys_t *zp = (const znode_phys_t *) dnode->dn_bonus;
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size_t n;
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int rc;
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n = size;
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if (*offp + n > zp->zp_size)
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n = zp->zp_size - *offp;
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rc = dnode_read(spa, dnode, *offp, start, n);
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if (rc)
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return (-1);
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*offp += n;
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return (n);
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}
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/*
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* Current ZFS pool
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*/
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spa_t *spa;
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/*
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* A wrapper for dskread that doesn't have to worry about whether the
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* buffer pointer crosses a 64k boundary.
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*/
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static int
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vdev_read(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes)
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{
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char *p;
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daddr_t lba;
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unsigned int nb;
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struct dsk *dsk = (struct dsk *) priv;
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if ((off & (DEV_BSIZE - 1)) || (bytes & (DEV_BSIZE - 1)))
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return -1;
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p = buf;
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lba = off / DEV_BSIZE;
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while (bytes > 0) {
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nb = bytes / DEV_BSIZE;
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if (nb > READ_BUF_SIZE / DEV_BSIZE)
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nb = READ_BUF_SIZE / DEV_BSIZE;
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if (drvread(dsk, dmadat->rdbuf, lba, nb))
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return -1;
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memcpy(p, dmadat->rdbuf, nb * DEV_BSIZE);
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p += nb * DEV_BSIZE;
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lba += nb;
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bytes -= nb * DEV_BSIZE;
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}
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return 0;
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}
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static int
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xfsread(const dnode_phys_t *dnode, off_t *offp, void *buf, size_t nbyte)
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{
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if ((size_t)zfs_read(spa, dnode, offp, buf, nbyte) != nbyte) {
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printf("Invalid %s\n", "format");
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return -1;
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}
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return 0;
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}
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static void
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bios_getmem(void)
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{
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uint64_t size;
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/* Parse system memory map */
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v86.ebx = 0;
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do {
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v86.ctl = V86_FLAGS;
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v86.addr = 0x15; /* int 0x15 function 0xe820*/
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v86.eax = 0xe820;
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v86.ecx = sizeof(struct bios_smap);
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v86.edx = SMAP_SIG;
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v86.es = VTOPSEG(&smap);
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v86.edi = VTOPOFF(&smap);
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v86int();
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if ((v86.efl & 1) || (v86.eax != SMAP_SIG))
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break;
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/* look for a low-memory segment that's large enough */
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if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0) &&
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(smap.length >= (512 * 1024)))
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bios_basemem = smap.length;
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/* look for the first segment in 'extended' memory */
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if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0x100000)) {
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bios_extmem = smap.length;
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}
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/*
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* Look for the largest segment in 'extended' memory beyond
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* 1MB but below 4GB.
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*/
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if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base > 0x100000) &&
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(smap.base < 0x100000000ull)) {
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size = smap.length;
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/*
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* If this segment crosses the 4GB boundary, truncate it.
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*/
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if (smap.base + size > 0x100000000ull)
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size = 0x100000000ull - smap.base;
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if (size > high_heap_size) {
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high_heap_size = size;
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high_heap_base = smap.base;
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}
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}
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} while (v86.ebx != 0);
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/* Fall back to the old compatibility function for base memory */
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if (bios_basemem == 0) {
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v86.ctl = 0;
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v86.addr = 0x12; /* int 0x12 */
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v86int();
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bios_basemem = (v86.eax & 0xffff) * 1024;
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}
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/* Fall back through several compatibility functions for extended memory */
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if (bios_extmem == 0) {
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v86.ctl = V86_FLAGS;
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v86.addr = 0x15; /* int 0x15 function 0xe801*/
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v86.eax = 0xe801;
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v86int();
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if (!(v86.efl & 1)) {
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bios_extmem = ((v86.ecx & 0xffff) + ((v86.edx & 0xffff) * 64)) * 1024;
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}
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}
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if (bios_extmem == 0) {
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v86.ctl = 0;
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v86.addr = 0x15; /* int 0x15 function 0x88*/
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v86.eax = 0x8800;
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v86int();
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bios_extmem = (v86.eax & 0xffff) * 1024;
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}
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/*
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* If we have extended memory and did not find a suitable heap
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* region in the SMAP, use the last 3MB of 'extended' memory as a
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* high heap candidate.
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*/
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if (bios_extmem >= HEAP_MIN && high_heap_size < HEAP_MIN) {
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high_heap_size = HEAP_MIN;
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high_heap_base = bios_extmem + 0x100000 - HEAP_MIN;
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}
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}
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static inline void
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getstr(void)
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{
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char *s;
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int c;
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s = cmd;
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for (;;) {
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switch (c = xgetc(0)) {
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case 0:
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break;
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case '\177':
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case '\b':
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if (s > cmd) {
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s--;
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printf("\b \b");
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}
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break;
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case '\n':
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case '\r':
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*s = 0;
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return;
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default:
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if (s - cmd < sizeof(cmd) - 1)
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*s++ = c;
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putchar(c);
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}
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}
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}
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static inline void
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putc(int c)
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{
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v86.addr = 0x10;
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v86.eax = 0xe00 | (c & 0xff);
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v86.ebx = 0x7;
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v86int();
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}
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|
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/*
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* Try to detect a device supported by the legacy int13 BIOS
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*/
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static int
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int13probe(int drive)
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{
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v86.ctl = V86_FLAGS;
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v86.addr = 0x13;
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v86.eax = 0x800;
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v86.edx = drive;
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v86int();
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if (!(v86.efl & 0x1) && /* carry clear */
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((v86.edx & 0xff) != (drive & DRV_MASK))) { /* unit # OK */
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if ((v86.ecx & 0x3f) == 0) { /* absurd sector size */
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return(0); /* skip device */
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}
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return (1);
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}
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return(0);
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}
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|
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/*
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* We call this when we find a ZFS vdev - ZFS consumes the dsk
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* structure so we must make a new one.
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*/
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static struct dsk *
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copy_dsk(struct dsk *dsk)
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{
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struct dsk *newdsk;
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newdsk = malloc(sizeof(struct dsk));
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*newdsk = *dsk;
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return (newdsk);
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}
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static void
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probe_drive(struct dsk *dsk, spa_t **spap)
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{
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#ifdef GPT
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struct gpt_hdr hdr;
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struct gpt_ent *ent;
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daddr_t slba, elba;
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unsigned part, entries_per_sec;
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#endif
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struct dos_partition *dp;
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char *sec;
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unsigned i;
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|
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/*
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* If we find a vdev on the whole disk, stop here. Otherwise dig
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* out the MBR and probe each slice in turn for a vdev.
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*/
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if (vdev_probe(vdev_read, dsk, spap) == 0)
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return;
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sec = dmadat->secbuf;
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dsk->start = 0;
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|
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#ifdef GPT
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|
/*
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|
* First check for GPT.
|
|
*/
|
|
if (drvread(dsk, sec, 1, 1)) {
|
|
return;
|
|
}
|
|
memcpy(&hdr, sec, sizeof(hdr));
|
|
if (memcmp(hdr.hdr_sig, GPT_HDR_SIG, sizeof(hdr.hdr_sig)) != 0 ||
|
|
hdr.hdr_lba_self != 1 || hdr.hdr_revision < 0x00010000 ||
|
|
hdr.hdr_entsz < sizeof(*ent) || DEV_BSIZE % hdr.hdr_entsz != 0) {
|
|
goto trymbr;
|
|
}
|
|
|
|
/*
|
|
* Probe all GPT partitions for the presense of ZFS pools. We
|
|
* return the spa_t for the first we find (if requested). This
|
|
* will have the effect of booting from the first pool on the
|
|
* disk.
|
|
*/
|
|
entries_per_sec = DEV_BSIZE / hdr.hdr_entsz;
|
|
slba = hdr.hdr_lba_table;
|
|
elba = slba + hdr.hdr_entries / entries_per_sec;
|
|
while (slba < elba) {
|
|
dsk->start = 0;
|
|
if (drvread(dsk, sec, slba, 1))
|
|
return;
|
|
for (part = 0; part < entries_per_sec; part++) {
|
|
ent = (struct gpt_ent *)(sec + part * hdr.hdr_entsz);
|
|
if (memcmp(&ent->ent_type, &freebsd_zfs_uuid,
|
|
sizeof(uuid_t)) == 0) {
|
|
dsk->start = ent->ent_lba_start;
|
|
if (vdev_probe(vdev_read, dsk, spap) == 0) {
|
|
/*
|
|
* We record the first pool we find (we will try
|
|
* to boot from that one).
|
|
*/
|
|
spap = 0;
|
|
|
|
/*
|
|
* This slice had a vdev. We need a new dsk
|
|
* structure now since the vdev now owns this one.
|
|
*/
|
|
dsk = copy_dsk(dsk);
|
|
}
|
|
}
|
|
}
|
|
slba++;
|
|
}
|
|
return;
|
|
trymbr:
|
|
#endif
|
|
|
|
if (drvread(dsk, sec, DOSBBSECTOR, 1))
|
|
return;
|
|
dp = (void *)(sec + DOSPARTOFF);
|
|
|
|
for (i = 0; i < NDOSPART; i++) {
|
|
if (!dp[i].dp_typ)
|
|
continue;
|
|
dsk->start = dp[i].dp_start;
|
|
if (vdev_probe(vdev_read, dsk, spap) == 0) {
|
|
/*
|
|
* We record the first pool we find (we will try to boot
|
|
* from that one.
|
|
*/
|
|
spap = 0;
|
|
|
|
/*
|
|
* This slice had a vdev. We need a new dsk structure now
|
|
* since the vdev now owns this one.
|
|
*/
|
|
dsk = copy_dsk(dsk);
|
|
}
|
|
}
|
|
}
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
int autoboot, i;
|
|
dnode_phys_t dn;
|
|
off_t off;
|
|
struct dsk *dsk;
|
|
|
|
bios_getmem();
|
|
|
|
if (high_heap_size > 0) {
|
|
heap_end = PTOV(high_heap_base + high_heap_size);
|
|
heap_next = PTOV(high_heap_base);
|
|
} else {
|
|
heap_next = (char *) dmadat + sizeof(*dmadat);
|
|
heap_end = (char *) PTOV(bios_basemem);
|
|
}
|
|
|
|
dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base);
|
|
v86.ctl = V86_FLAGS;
|
|
|
|
dsk = malloc(sizeof(struct dsk));
|
|
dsk->drive = *(uint8_t *)PTOV(ARGS);
|
|
dsk->type = dsk->drive & DRV_HARD ? TYPE_AD : TYPE_FD;
|
|
dsk->unit = dsk->drive & DRV_MASK;
|
|
dsk->slice = *(uint8_t *)PTOV(ARGS + 1) + 1;
|
|
dsk->part = 0;
|
|
dsk->start = 0;
|
|
dsk->init = 0;
|
|
|
|
bootinfo.bi_version = BOOTINFO_VERSION;
|
|
bootinfo.bi_size = sizeof(bootinfo);
|
|
bootinfo.bi_basemem = bios_basemem / 1024;
|
|
bootinfo.bi_extmem = bios_extmem / 1024;
|
|
bootinfo.bi_memsizes_valid++;
|
|
bootinfo.bi_bios_dev = dsk->drive;
|
|
|
|
bootdev = MAKEBOOTDEV(dev_maj[dsk->type],
|
|
dsk->slice, dsk->unit, dsk->part),
|
|
|
|
/* Process configuration file */
|
|
|
|
autoboot = 1;
|
|
|
|
zfs_init();
|
|
|
|
/*
|
|
* Probe the boot drive first - we will try to boot from whatever
|
|
* pool we find on that drive.
|
|
*/
|
|
probe_drive(dsk, &spa);
|
|
|
|
/*
|
|
* Probe the rest of the drives that the bios knows about. This
|
|
* will find any other available pools and it may fill in missing
|
|
* vdevs for the boot pool.
|
|
*/
|
|
for (i = 0; i < 128; i++) {
|
|
if ((i | DRV_HARD) == *(uint8_t *)PTOV(ARGS))
|
|
continue;
|
|
|
|
if (!int13probe(i | DRV_HARD))
|
|
break;
|
|
|
|
dsk = malloc(sizeof(struct dsk));
|
|
dsk->drive = i | DRV_HARD;
|
|
dsk->type = dsk->drive & TYPE_AD;
|
|
dsk->unit = i;
|
|
dsk->slice = 0;
|
|
dsk->part = 0;
|
|
dsk->start = 0;
|
|
dsk->init = 0;
|
|
probe_drive(dsk, 0);
|
|
}
|
|
|
|
/*
|
|
* If we didn't find a pool on the boot drive, default to the
|
|
* first pool we found, if any.
|
|
*/
|
|
if (!spa) {
|
|
spa = STAILQ_FIRST(&zfs_pools);
|
|
if (!spa) {
|
|
printf("No ZFS pools located, can't boot\n");
|
|
for (;;)
|
|
;
|
|
}
|
|
}
|
|
|
|
zfs_mount_pool(spa);
|
|
|
|
if (zfs_lookup(spa, PATH_CONFIG, &dn) == 0) {
|
|
off = 0;
|
|
zfs_read(spa, &dn, &off, cmd, sizeof(cmd));
|
|
}
|
|
|
|
if (*cmd) {
|
|
if (parse())
|
|
autoboot = 0;
|
|
if (!OPT_CHECK(RBX_QUIET))
|
|
printf("%s: %s", PATH_CONFIG, cmd);
|
|
/* Do not process this command twice */
|
|
*cmd = 0;
|
|
}
|
|
|
|
/*
|
|
* Try to exec stage 3 boot loader. If interrupted by a keypress,
|
|
* or in case of failure, try to load a kernel directly instead.
|
|
*/
|
|
|
|
if (autoboot && !*kname) {
|
|
memcpy(kname, PATH_BOOT3, sizeof(PATH_BOOT3));
|
|
if (!keyhit(3*SECOND)) {
|
|
load();
|
|
memcpy(kname, PATH_KERNEL, sizeof(PATH_KERNEL));
|
|
}
|
|
}
|
|
|
|
/* Present the user with the boot2 prompt. */
|
|
|
|
for (;;) {
|
|
if (!autoboot || !OPT_CHECK(RBX_QUIET))
|
|
printf("\nFreeBSD/i386 boot\n"
|
|
"Default: %s:%s\n"
|
|
"boot: ",
|
|
spa->spa_name, kname);
|
|
if (ioctrl & IO_SERIAL)
|
|
sio_flush();
|
|
if (!autoboot || keyhit(5*SECOND))
|
|
getstr();
|
|
else if (!autoboot || !OPT_CHECK(RBX_QUIET))
|
|
putchar('\n');
|
|
autoboot = 0;
|
|
if (parse())
|
|
putchar('\a');
|
|
else
|
|
load();
|
|
}
|
|
}
|
|
|
|
/* XXX - Needed for btxld to link the boot2 binary; do not remove. */
|
|
void
|
|
exit(int x)
|
|
{
|
|
}
|
|
|
|
static void
|
|
load(void)
|
|
{
|
|
union {
|
|
struct exec ex;
|
|
Elf32_Ehdr eh;
|
|
} hdr;
|
|
static Elf32_Phdr ep[2];
|
|
static Elf32_Shdr es[2];
|
|
caddr_t p;
|
|
dnode_phys_t dn;
|
|
off_t off;
|
|
uint32_t addr, x;
|
|
int fmt, i, j;
|
|
|
|
if (zfs_lookup(spa, kname, &dn)) {
|
|
return;
|
|
}
|
|
off = 0;
|
|
if (xfsread(&dn, &off, &hdr, sizeof(hdr)))
|
|
return;
|
|
if (N_GETMAGIC(hdr.ex) == ZMAGIC)
|
|
fmt = 0;
|
|
else if (IS_ELF(hdr.eh))
|
|
fmt = 1;
|
|
else {
|
|
printf("Invalid %s\n", "format");
|
|
return;
|
|
}
|
|
if (fmt == 0) {
|
|
addr = hdr.ex.a_entry & 0xffffff;
|
|
p = PTOV(addr);
|
|
off = PAGE_SIZE;
|
|
if (xfsread(&dn, &off, p, hdr.ex.a_text))
|
|
return;
|
|
p += roundup2(hdr.ex.a_text, PAGE_SIZE);
|
|
if (xfsread(&dn, &off, p, hdr.ex.a_data))
|
|
return;
|
|
p += hdr.ex.a_data + roundup2(hdr.ex.a_bss, PAGE_SIZE);
|
|
bootinfo.bi_symtab = VTOP(p);
|
|
memcpy(p, &hdr.ex.a_syms, sizeof(hdr.ex.a_syms));
|
|
p += sizeof(hdr.ex.a_syms);
|
|
if (hdr.ex.a_syms) {
|
|
if (xfsread(&dn, &off, p, hdr.ex.a_syms))
|
|
return;
|
|
p += hdr.ex.a_syms;
|
|
if (xfsread(&dn, &off, p, sizeof(int)))
|
|
return;
|
|
x = *(uint32_t *)p;
|
|
p += sizeof(int);
|
|
x -= sizeof(int);
|
|
if (xfsread(&dn, &off, p, x))
|
|
return;
|
|
p += x;
|
|
}
|
|
} else {
|
|
off = hdr.eh.e_phoff;
|
|
for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) {
|
|
if (xfsread(&dn, &off, ep + j, sizeof(ep[0])))
|
|
return;
|
|
if (ep[j].p_type == PT_LOAD)
|
|
j++;
|
|
}
|
|
for (i = 0; i < 2; i++) {
|
|
p = PTOV(ep[i].p_paddr & 0xffffff);
|
|
off = ep[i].p_offset;
|
|
if (xfsread(&dn, &off, p, ep[i].p_filesz))
|
|
return;
|
|
}
|
|
p += roundup2(ep[1].p_memsz, PAGE_SIZE);
|
|
bootinfo.bi_symtab = VTOP(p);
|
|
if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) {
|
|
off = hdr.eh.e_shoff + sizeof(es[0]) *
|
|
(hdr.eh.e_shstrndx + 1);
|
|
if (xfsread(&dn, &off, &es, sizeof(es)))
|
|
return;
|
|
for (i = 0; i < 2; i++) {
|
|
memcpy(p, &es[i].sh_size, sizeof(es[i].sh_size));
|
|
p += sizeof(es[i].sh_size);
|
|
off = es[i].sh_offset;
|
|
if (xfsread(&dn, &off, p, es[i].sh_size))
|
|
return;
|
|
p += es[i].sh_size;
|
|
}
|
|
}
|
|
addr = hdr.eh.e_entry & 0xffffff;
|
|
}
|
|
bootinfo.bi_esymtab = VTOP(p);
|
|
bootinfo.bi_kernelname = VTOP(kname);
|
|
__exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK),
|
|
bootdev,
|
|
KARGS_FLAGS_ZFS,
|
|
(uint32_t) spa->spa_guid,
|
|
(uint32_t) (spa->spa_guid >> 32),
|
|
VTOP(&bootinfo));
|
|
}
|
|
|
|
static int
|
|
parse()
|
|
{
|
|
char *arg = cmd;
|
|
char *ep, *p, *q;
|
|
const char *cp;
|
|
//unsigned int drv;
|
|
int c, i, j;
|
|
|
|
while ((c = *arg++)) {
|
|
if (c == ' ' || c == '\t' || c == '\n')
|
|
continue;
|
|
for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++);
|
|
ep = p;
|
|
if (*p)
|
|
*p++ = 0;
|
|
if (c == '-') {
|
|
while ((c = *arg++)) {
|
|
if (c == 'P') {
|
|
if (*(uint8_t *)PTOV(0x496) & 0x10) {
|
|
cp = "yes";
|
|
} else {
|
|
opts |= OPT_SET(RBX_DUAL) | OPT_SET(RBX_SERIAL);
|
|
cp = "no";
|
|
}
|
|
printf("Keyboard: %s\n", cp);
|
|
continue;
|
|
} else if (c == 'S') {
|
|
j = 0;
|
|
while ((unsigned int)(i = *arg++ - '0') <= 9)
|
|
j = j * 10 + i;
|
|
if (j > 0 && i == -'0') {
|
|
comspeed = j;
|
|
break;
|
|
}
|
|
/* Fall through to error below ('S' not in optstr[]). */
|
|
}
|
|
for (i = 0; c != optstr[i]; i++)
|
|
if (i == NOPT - 1)
|
|
return -1;
|
|
opts ^= OPT_SET(flags[i]);
|
|
}
|
|
ioctrl = OPT_CHECK(RBX_DUAL) ? (IO_SERIAL|IO_KEYBOARD) :
|
|
OPT_CHECK(RBX_SERIAL) ? IO_SERIAL : IO_KEYBOARD;
|
|
if (ioctrl & IO_SERIAL)
|
|
sio_init(115200 / comspeed);
|
|
} if (c == '?') {
|
|
dnode_phys_t dn;
|
|
|
|
if (zfs_lookup(spa, arg, &dn) == 0) {
|
|
zap_list(spa, &dn);
|
|
}
|
|
return -1;
|
|
} else {
|
|
arg--;
|
|
|
|
/*
|
|
* Report pool status if the comment is 'status'. Lets
|
|
* hope no-one wants to load /status as a kernel.
|
|
*/
|
|
if (!strcmp(arg, "status")) {
|
|
spa_all_status();
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* If there is a colon, switch pools.
|
|
*/
|
|
q = (char *) strchr(arg, ':');
|
|
if (q) {
|
|
spa_t *newspa;
|
|
|
|
*q++ = 0;
|
|
newspa = spa_find_by_name(arg);
|
|
if (newspa) {
|
|
spa = newspa;
|
|
zfs_mount_pool(spa);
|
|
} else {
|
|
printf("\nCan't find ZFS pool %s\n", arg);
|
|
return -1;
|
|
}
|
|
arg = q;
|
|
}
|
|
if ((i = ep - arg)) {
|
|
if ((size_t)i >= sizeof(kname))
|
|
return -1;
|
|
memcpy(kname, arg, i + 1);
|
|
}
|
|
}
|
|
arg = p;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
printf(const char *fmt,...)
|
|
{
|
|
va_list ap;
|
|
char buf[20];
|
|
char *s;
|
|
unsigned long long u;
|
|
int c;
|
|
int minus;
|
|
int prec;
|
|
int l;
|
|
int len;
|
|
int pad;
|
|
|
|
va_start(ap, fmt);
|
|
while ((c = *fmt++)) {
|
|
if (c == '%') {
|
|
minus = 0;
|
|
prec = 0;
|
|
l = 0;
|
|
nextfmt:
|
|
c = *fmt++;
|
|
switch (c) {
|
|
case '-':
|
|
minus = 1;
|
|
goto nextfmt;
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
prec = 10 * prec + (c - '0');
|
|
goto nextfmt;
|
|
case 'c':
|
|
putchar(va_arg(ap, int));
|
|
continue;
|
|
case 'l':
|
|
l++;
|
|
goto nextfmt;
|
|
case 's':
|
|
s = va_arg(ap, char *);
|
|
if (prec) {
|
|
len = strlen(s);
|
|
if (len < prec)
|
|
pad = prec - len;
|
|
else
|
|
pad = 0;
|
|
if (minus)
|
|
while (pad--)
|
|
putchar(' ');
|
|
for (; *s; s++)
|
|
putchar(*s);
|
|
if (!minus)
|
|
while (pad--)
|
|
putchar(' ');
|
|
} else {
|
|
for (; *s; s++)
|
|
putchar(*s);
|
|
}
|
|
continue;
|
|
case 'u':
|
|
switch (l) {
|
|
case 2:
|
|
u = va_arg(ap, unsigned long long);
|
|
break;
|
|
case 1:
|
|
u = va_arg(ap, unsigned long);
|
|
break;
|
|
default:
|
|
u = va_arg(ap, unsigned);
|
|
break;
|
|
}
|
|
s = buf;
|
|
do
|
|
*s++ = '0' + u % 10U;
|
|
while (u /= 10U);
|
|
while (--s >= buf)
|
|
putchar(*s);
|
|
continue;
|
|
}
|
|
}
|
|
putchar(c);
|
|
}
|
|
va_end(ap);
|
|
return;
|
|
}
|
|
|
|
static void
|
|
putchar(int c)
|
|
{
|
|
if (c == '\n')
|
|
xputc('\r');
|
|
xputc(c);
|
|
}
|
|
|
|
#ifdef GPT
|
|
static struct {
|
|
uint16_t len;
|
|
uint16_t count;
|
|
uint16_t off;
|
|
uint16_t seg;
|
|
uint64_t lba;
|
|
} packet;
|
|
#endif
|
|
|
|
static int
|
|
drvread(struct dsk *dsk, void *buf, daddr_t lba, unsigned nblk)
|
|
{
|
|
#ifdef GPT
|
|
static unsigned c = 0x2d5c7c2f;
|
|
|
|
if (!OPT_CHECK(RBX_QUIET))
|
|
printf("%c\b", c = c << 8 | c >> 24);
|
|
packet.len = 0x10;
|
|
packet.count = nblk;
|
|
packet.off = VTOPOFF(buf);
|
|
packet.seg = VTOPSEG(buf);
|
|
packet.lba = lba + dsk->start;
|
|
v86.ctl = V86_FLAGS;
|
|
v86.addr = 0x13;
|
|
v86.eax = 0x4200;
|
|
v86.edx = dsk->drive;
|
|
v86.ds = VTOPSEG(&packet);
|
|
v86.esi = VTOPOFF(&packet);
|
|
v86int();
|
|
if (V86_CY(v86.efl)) {
|
|
printf("error %u lba %u\n", v86.eax >> 8 & 0xff, lba);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
#else
|
|
static unsigned c = 0x2d5c7c2f;
|
|
|
|
lba += dsk->start;
|
|
if (!OPT_CHECK(RBX_QUIET))
|
|
printf("%c\b", c = c << 8 | c >> 24);
|
|
v86.ctl = V86_ADDR | V86_CALLF | V86_FLAGS;
|
|
v86.addr = XREADORG; /* call to xread in boot1 */
|
|
v86.es = VTOPSEG(buf);
|
|
v86.eax = lba;
|
|
v86.ebx = VTOPOFF(buf);
|
|
v86.ecx = lba >> 32;
|
|
v86.edx = nblk << 8 | dsk->drive;
|
|
v86int();
|
|
v86.ctl = V86_FLAGS;
|
|
if (V86_CY(v86.efl)) {
|
|
printf("error %u lba %u\n", v86.eax >> 8 & 0xff, lba);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
static int
|
|
keyhit(unsigned ticks)
|
|
{
|
|
uint32_t t0, t1;
|
|
|
|
if (OPT_CHECK(RBX_NOINTR))
|
|
return 0;
|
|
t0 = 0;
|
|
for (;;) {
|
|
if (xgetc(1))
|
|
return 1;
|
|
t1 = *(uint32_t *)PTOV(0x46c);
|
|
if (!t0)
|
|
t0 = t1;
|
|
if (t1 < t0 || t1 >= t0 + ticks)
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int
|
|
xputc(int c)
|
|
{
|
|
if (ioctrl & IO_KEYBOARD)
|
|
putc(c);
|
|
if (ioctrl & IO_SERIAL)
|
|
sio_putc(c);
|
|
return c;
|
|
}
|
|
|
|
static int
|
|
xgetc(int fn)
|
|
{
|
|
if (OPT_CHECK(RBX_NOINTR))
|
|
return 0;
|
|
for (;;) {
|
|
if (ioctrl & IO_KEYBOARD && getc(1))
|
|
return fn ? 1 : getc(0);
|
|
if (ioctrl & IO_SERIAL && sio_ischar())
|
|
return fn ? 1 : sio_getc();
|
|
if (fn)
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int
|
|
getc(int fn)
|
|
{
|
|
/*
|
|
* The extra comparison against zero is an attempt to work around
|
|
* what appears to be a bug in QEMU and Bochs. Both emulators
|
|
* sometimes report a key-press with scancode one and ascii zero
|
|
* when no such key is pressed in reality. As far as I can tell,
|
|
* this only happens shortly after a reboot.
|
|
*/
|
|
v86.addr = 0x16;
|
|
v86.eax = fn << 8;
|
|
v86int();
|
|
return fn == 0 ? v86.eax & 0xff : (!V86_ZR(v86.efl) && (v86.eax & 0xff));
|
|
}
|