6b63037a39
When loader(8) is built with zfs support enabled, it assumes that any extarg data present is a zfs_boot_args struct, but if the first-stage loader was gptboot(8) the extarg data is actually a geli_boot_args struct. Luckily, zfsboot(8) and gptzfsboot(8) have always passed KARGS_FLAGS_ZFS along with KARGS_FLAGS_EXTARG, so we can use KARGS_FLAGS_ZFS to decide whether the extarg data is a zfs_boot_args struct. To avoid similar problems in the future, gptboot(8) now passes a new KARGS_FLAGS_GELI to indicate that extarg data is geli_boot_args. In loader(8), if the neither KARGS_FLAGS_ZFS nor KARGS_FLAGS_GELI is set but extarg data is present (which will be the case for gptboot compiled before this change), we now check for the known size of the geli_boot_args struct passed by the older versions of gptboot as a way of confirming what type of extarg data is present. In a semi-related tidying up, since loader's main() has already decided what type of extarg data is present and set the global 'zargs' var accordingly, don't repeat the check in extract_currdev, just check whether zargs is NULL or not. X-MFC after: a few days, along with prior related changes.
657 lines
14 KiB
C
657 lines
14 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/gpt.h>
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#include <sys/dirent.h>
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#include <sys/reboot.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 <machine/psl.h>
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#include <stdarg.h>
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#include <a.out.h>
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#include <btxv86.h>
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#include "stand.h"
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#include "bootargs.h"
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#include "lib.h"
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#include "rbx.h"
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#include "drv.h"
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#include "cons.h"
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#include "gpt.h"
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#include "paths.h"
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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 MEM_BASE 0x12
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#define MEM_EXT 0x15
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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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extern uint32_t _end;
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static const uuid_t freebsd_ufs_uuid = GPT_ENT_TYPE_FREEBSD_UFS;
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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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uint32_t opts;
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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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static char kname[1024];
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static int comspeed = SIOSPD;
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static struct bootinfo bootinfo;
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#ifdef LOADER_GELI_SUPPORT
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static struct geli_boot_args geliargs;
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#endif
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static vm_offset_t high_heap_base;
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static 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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static void load(void);
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static int parse_cmds(char *, int *);
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static int dskread(void *, daddr_t, unsigned);
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#ifdef LOADER_GELI_SUPPORT
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static int vdev_read(void *vdev __unused, void *priv, off_t off, void *buf,
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size_t bytes);
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#endif
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#include "ufsread.c"
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#include "gpt.c"
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#ifdef LOADER_GELI_SUPPORT
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#include "geliboot.h"
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static char gelipw[GELI_PW_MAXLEN];
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#endif
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struct gptdsk {
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struct dsk dsk;
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#ifdef LOADER_GELI_SUPPORT
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struct geli_dev *gdev;
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#endif
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};
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static struct gptdsk gdsk;
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static inline int
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xfsread(ufs_ino_t inode, void *buf, size_t nbyte)
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{
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if ((size_t)fsread(inode, 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 = MEM_EXT; /* 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) &&
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(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) &&
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(smap.base > 0x100000) && (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,
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* 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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/*
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* Fall back through several compatibility functions for extended
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* memory
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*/
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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) +
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((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 int
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gptinit(void)
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{
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if (gptread(&freebsd_ufs_uuid, &gdsk.dsk, dmadat->secbuf) == -1) {
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printf("%s: unable to load GPT\n", BOOTPROG);
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return (-1);
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}
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if (gptfind(&freebsd_ufs_uuid, &gdsk.dsk, gdsk.dsk.part) == -1) {
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printf("%s: no UFS partition was found\n", BOOTPROG);
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return (-1);
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}
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#ifdef LOADER_GELI_SUPPORT
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gdsk.gdev = geli_taste(vdev_read, &gdsk.dsk,
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(gpttable[curent].ent_lba_end - gpttable[curent].ent_lba_start),
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"disk%up%u:", gdsk.dsk.unit, curent + 1);
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if (gdsk.gdev != NULL) {
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if (geli_havekey(gdsk.gdev) != 0 &&
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geli_passphrase(gdsk.gdev, gelipw) != 0) {
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printf("%s: unable to decrypt GELI key\n", BOOTPROG);
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return (-1);
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}
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}
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#endif
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dsk_meta = 0;
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return (0);
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}
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int main(void);
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int
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main(void)
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{
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char cmd[512], cmdtmp[512];
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ssize_t sz;
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int autoboot, dskupdated;
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ufs_ino_t ino;
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dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base);
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bios_getmem();
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if (high_heap_size > 0) {
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heap_end = PTOV(high_heap_base + high_heap_size);
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heap_next = PTOV(high_heap_base);
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} else {
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heap_next = (char *)dmadat + sizeof(*dmadat);
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heap_end = (char *)PTOV(bios_basemem);
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}
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setheap(heap_next, heap_end);
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v86.ctl = V86_FLAGS;
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v86.efl = PSL_RESERVED_DEFAULT | PSL_I;
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gdsk.dsk.drive = *(uint8_t *)PTOV(ARGS);
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gdsk.dsk.type = gdsk.dsk.drive & DRV_HARD ? TYPE_AD : TYPE_FD;
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gdsk.dsk.unit = gdsk.dsk.drive & DRV_MASK;
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gdsk.dsk.part = -1;
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gdsk.dsk.start = 0;
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bootinfo.bi_version = BOOTINFO_VERSION;
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bootinfo.bi_size = sizeof(bootinfo);
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bootinfo.bi_basemem = bios_basemem / 1024;
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bootinfo.bi_extmem = bios_extmem / 1024;
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bootinfo.bi_memsizes_valid++;
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bootinfo.bi_bios_dev = gdsk.dsk.drive;
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/* Process configuration file */
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if (gptinit() != 0)
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return (-1);
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autoboot = 1;
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*cmd = '\0';
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for (;;) {
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*kname = '\0';
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if ((ino = lookup(PATH_CONFIG)) ||
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(ino = lookup(PATH_DOTCONFIG))) {
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sz = fsread(ino, cmd, sizeof(cmd) - 1);
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cmd[(sz < 0) ? 0 : sz] = '\0';
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}
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if (*cmd != '\0') {
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memcpy(cmdtmp, cmd, sizeof(cmdtmp));
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if (parse_cmds(cmdtmp, &dskupdated))
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break;
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if (dskupdated && gptinit() != 0)
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break;
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if (!OPT_CHECK(RBX_QUIET))
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printf("%s: %s", PATH_CONFIG, cmd);
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*cmd = '\0';
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}
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if (autoboot && keyhit(3)) {
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if (*kname == '\0')
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memcpy(kname, PATH_LOADER, sizeof(PATH_LOADER));
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break;
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}
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autoboot = 0;
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/*
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* Try to exec stage 3 boot loader. If interrupted by a
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* keypress, or in case of failure, try to load a kernel
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* directly instead.
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*/
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if (*kname != '\0')
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load();
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memcpy(kname, PATH_LOADER, sizeof(PATH_LOADER));
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load();
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memcpy(kname, PATH_KERNEL, sizeof(PATH_KERNEL));
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load();
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gptbootfailed(&gdsk.dsk);
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if (gptfind(&freebsd_ufs_uuid, &gdsk.dsk, -1) == -1)
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break;
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dsk_meta = 0;
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}
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/* Present the user with the boot2 prompt. */
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for (;;) {
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if (!OPT_CHECK(RBX_QUIET)) {
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printf("\nFreeBSD/x86 boot\n"
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"Default: %u:%s(%up%u)%s\n"
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"boot: ",
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gdsk.dsk.drive & DRV_MASK, dev_nm[gdsk.dsk.type],
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gdsk.dsk.unit, gdsk.dsk.part, kname);
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}
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if (ioctrl & IO_SERIAL)
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sio_flush();
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*cmd = '\0';
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if (keyhit(0))
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getstr(cmd, sizeof(cmd));
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else if (!OPT_CHECK(RBX_QUIET))
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putchar('\n');
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if (parse_cmds(cmd, &dskupdated)) {
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putchar('\a');
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continue;
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}
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if (dskupdated && gptinit() != 0)
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continue;
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load();
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}
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/* NOTREACHED */
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}
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/* XXX - Needed for btxld to link the boot2 binary; do not remove. */
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void
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exit(int x)
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{
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while (1);
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__unreachable();
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}
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static void
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load(void)
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{
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union {
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struct exec ex;
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Elf32_Ehdr eh;
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} hdr;
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static Elf32_Phdr ep[2];
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static Elf32_Shdr es[2];
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caddr_t p;
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ufs_ino_t ino;
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uint32_t addr, x;
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int fmt, i, j;
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if (!(ino = lookup(kname))) {
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if (!ls) {
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printf("%s: No %s on %u:%s(%up%u)\n", BOOTPROG,
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kname, gdsk.dsk.drive & DRV_MASK,
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dev_nm[gdsk.dsk.type], gdsk.dsk.unit,
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gdsk.dsk.part);
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}
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return;
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}
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if (xfsread(ino, &hdr, sizeof(hdr)))
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return;
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if (N_GETMAGIC(hdr.ex) == ZMAGIC)
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fmt = 0;
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else if (IS_ELF(hdr.eh))
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fmt = 1;
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else {
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printf("Invalid %s\n", "format");
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return;
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}
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if (fmt == 0) {
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addr = hdr.ex.a_entry & 0xffffff;
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p = PTOV(addr);
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fs_off = PAGE_SIZE;
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if (xfsread(ino, p, hdr.ex.a_text))
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return;
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p += roundup2(hdr.ex.a_text, PAGE_SIZE);
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if (xfsread(ino, p, hdr.ex.a_data))
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return;
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p += hdr.ex.a_data + roundup2(hdr.ex.a_bss, PAGE_SIZE);
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bootinfo.bi_symtab = VTOP(p);
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memcpy(p, &hdr.ex.a_syms, sizeof(hdr.ex.a_syms));
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p += sizeof(hdr.ex.a_syms);
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if (hdr.ex.a_syms) {
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if (xfsread(ino, p, hdr.ex.a_syms))
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return;
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p += hdr.ex.a_syms;
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if (xfsread(ino, p, sizeof(int)))
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return;
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x = *(uint32_t *)p;
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p += sizeof(int);
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x -= sizeof(int);
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if (xfsread(ino, p, x))
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return;
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p += x;
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}
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} else {
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fs_off = hdr.eh.e_phoff;
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for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) {
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if (xfsread(ino, ep + j, sizeof(ep[0])))
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return;
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if (ep[j].p_type == PT_LOAD)
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j++;
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}
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for (i = 0; i < 2; i++) {
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p = PTOV(ep[i].p_paddr & 0xffffff);
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fs_off = ep[i].p_offset;
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if (xfsread(ino, p, ep[i].p_filesz))
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return;
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}
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p += roundup2(ep[1].p_memsz, PAGE_SIZE);
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bootinfo.bi_symtab = VTOP(p);
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if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) {
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fs_off = hdr.eh.e_shoff + sizeof(es[0]) *
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(hdr.eh.e_shstrndx + 1);
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if (xfsread(ino, &es, sizeof(es)))
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return;
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for (i = 0; i < 2; i++) {
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memcpy(p, &es[i].sh_size,
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sizeof(es[i].sh_size));
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p += sizeof(es[i].sh_size);
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fs_off = es[i].sh_offset;
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if (xfsread(ino, p, es[i].sh_size))
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return;
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p += es[i].sh_size;
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}
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}
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addr = hdr.eh.e_entry & 0xffffff;
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}
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bootinfo.bi_esymtab = VTOP(p);
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bootinfo.bi_kernelname = VTOP(kname);
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bootinfo.bi_bios_dev = gdsk.dsk.drive;
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#ifdef LOADER_GELI_SUPPORT
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geliargs.size = sizeof(geliargs);
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explicit_bzero(gelipw, sizeof(gelipw));
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export_geli_boot_data(&geliargs.gelidata);
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#endif
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/*
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* Note that the geliargs struct is passed by value, not by pointer.
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* Code in btxldr.S copies the values from the entry stack to a fixed
|
|
* location within loader(8) at startup due to the presence of the
|
|
* KARGS_FLAGS_EXTARG flag.
|
|
*/
|
|
__exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK),
|
|
MAKEBOOTDEV(dev_maj[gdsk.dsk.type], gdsk.dsk.part + 1, gdsk.dsk.unit, 0xff),
|
|
#ifdef LOADER_GELI_SUPPORT
|
|
KARGS_FLAGS_GELI | KARGS_FLAGS_EXTARG, 0, 0, VTOP(&bootinfo), geliargs
|
|
#else
|
|
0, 0, 0, VTOP(&bootinfo)
|
|
#endif
|
|
);
|
|
}
|
|
|
|
static int
|
|
parse_cmds(char *cmdstr, int *dskupdated)
|
|
{
|
|
char *arg;
|
|
char *ep, *p, *q;
|
|
const char *cp;
|
|
unsigned int drv;
|
|
int c, i, j;
|
|
|
|
arg = cmdstr;
|
|
*dskupdated = 0;
|
|
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) {
|
|
if (sio_init(115200 / comspeed) != 0)
|
|
ioctrl &= ~IO_SERIAL;
|
|
}
|
|
} else {
|
|
for (q = arg--; *q && *q != '('; q++);
|
|
if (*q) {
|
|
drv = -1;
|
|
if (arg[1] == ':') {
|
|
drv = *arg - '0';
|
|
if (drv > 9)
|
|
return (-1);
|
|
arg += 2;
|
|
}
|
|
if (q - arg != 2)
|
|
return (-1);
|
|
for (i = 0; arg[0] != dev_nm[i][0] ||
|
|
arg[1] != dev_nm[i][1]; i++)
|
|
if (i == NDEV - 1)
|
|
return (-1);
|
|
gdsk.dsk.type = i;
|
|
arg += 3;
|
|
gdsk.dsk.unit = *arg - '0';
|
|
if (arg[1] != 'p' || gdsk.dsk.unit > 9)
|
|
return (-1);
|
|
arg += 2;
|
|
gdsk.dsk.part = *arg - '0';
|
|
if (gdsk.dsk.part < 1 || gdsk.dsk.part > 9)
|
|
return (-1);
|
|
arg++;
|
|
if (arg[0] != ')')
|
|
return (-1);
|
|
arg++;
|
|
if (drv == -1)
|
|
drv = gdsk.dsk.unit;
|
|
gdsk.dsk.drive = (gdsk.dsk.type <= TYPE_MAXHARD
|
|
? DRV_HARD : 0) + drv;
|
|
*dskupdated = 1;
|
|
}
|
|
if ((i = ep - arg)) {
|
|
if ((size_t)i >= sizeof(kname))
|
|
return (-1);
|
|
memcpy(kname, arg, i + 1);
|
|
}
|
|
}
|
|
arg = p;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
dskread(void *buf, daddr_t lba, unsigned nblk)
|
|
{
|
|
int err;
|
|
|
|
err = drvread(&gdsk.dsk, buf, lba + gdsk.dsk.start, nblk);
|
|
|
|
#ifdef LOADER_GELI_SUPPORT
|
|
if (err == 0 && gdsk.gdev != NULL) {
|
|
/* Decrypt */
|
|
if (geli_read(gdsk.gdev, lba * DEV_BSIZE, buf,
|
|
nblk * DEV_BSIZE))
|
|
return (err);
|
|
}
|
|
#endif
|
|
|
|
return (err);
|
|
}
|
|
|
|
#ifdef LOADER_GELI_SUPPORT
|
|
/*
|
|
* Read function compatible with the ZFS callback, required to keep the GELI
|
|
* implementation the same for both UFS and ZFS.
|
|
*/
|
|
static int
|
|
vdev_read(void *vdev __unused, void *priv, off_t off, void *buf, size_t bytes)
|
|
{
|
|
char *p;
|
|
daddr_t lba;
|
|
unsigned int nb;
|
|
struct gptdsk *dskp;
|
|
|
|
dskp = (struct gptdsk *)priv;
|
|
|
|
if ((off & (DEV_BSIZE - 1)) || (bytes & (DEV_BSIZE - 1)))
|
|
return (-1);
|
|
|
|
p = buf;
|
|
lba = off / DEV_BSIZE;
|
|
lba += dskp->dsk.start;
|
|
|
|
while (bytes > 0) {
|
|
nb = bytes / DEV_BSIZE;
|
|
if (nb > VBLKSIZE / DEV_BSIZE)
|
|
nb = VBLKSIZE / DEV_BSIZE;
|
|
if (drvread(&dskp->dsk, dmadat->blkbuf, lba, nb))
|
|
return (-1);
|
|
memcpy(p, dmadat->blkbuf, nb * DEV_BSIZE);
|
|
p += nb * DEV_BSIZE;
|
|
lba += nb;
|
|
bytes -= nb * DEV_BSIZE;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
#endif /* LOADER_GELI_SUPPORT */
|