1/*- 2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <stand.h> 28#include <sys/param.h> 29#include <sys/reboot.h> 30#include <sys/linker.h> 31#include <i386/include/bootinfo.h> 32 33#include "bootstrap.h" 34#include "modinfo.h" 35#include "libuserboot.h" 36 37#ifdef LOADER_GELI_SUPPORT 38#include "geliboot.h" 39#endif 40 41static struct bootinfo bi; 42 43/* 44 * Load the information expected by an i386 kernel. 45 * 46 * - The 'boothowto' argument is constructed 47 * - The 'bootdev' argument is constructed 48 * - The 'bootinfo' struct is constructed, and copied into the kernel space. 49 * - The kernel environment is copied into kernel space. 50 * - Module metadata are formatted and placed in kernel space. 51 */ 52int 53bi_load32(char *args, int *howtop, int *bootdevp, vm_offset_t *bip, vm_offset_t *modulep, vm_offset_t *kernendp) 54{ 55 struct preloaded_file *xp, *kfp; 56 struct devdesc *rootdev; 57 struct file_metadata *md; 58 vm_offset_t addr; 59 vm_offset_t kernend; 60 vm_offset_t envp; 61 vm_offset_t size; 62 vm_offset_t ssym, esym; 63 char *rootdevname; 64 int bootdevnr, howto; 65 char *kernelname; 66 const char *kernelpath; 67 uint64_t lowmem, highmem; 68 69 howto = bi_getboothowto(args); 70 71 /* 72 * Allow the environment variable 'rootdev' to override the supplied device 73 * This should perhaps go to MI code and/or have $rootdev tested/set by 74 * MI code before launching the kernel. 75 */ 76 rootdevname = getenv("rootdev"); 77 userboot_getdev((void **)(&rootdev), rootdevname, NULL); 78 if (rootdev == NULL) { /* bad $rootdev/$currdev */ 79 printf("can't determine root device\n"); 80 return(EINVAL); 81 } 82 83 /* Try reading the /etc/fstab file to select the root device */ 84 getrootmount(devformat(rootdev)); 85 86 bootdevnr = 0; 87#if 0 88 if (bootdevnr == -1) { 89 printf("root device %s invalid\n", devformat(rootdev)); 90 return (EINVAL); 91 } 92#endif 93 free(rootdev); 94 95 /* find the last module in the chain */ 96 addr = 0; 97 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) { 98 if (addr < (xp->f_addr + xp->f_size)) 99 addr = xp->f_addr + xp->f_size; 100 } 101 /* pad to a page boundary */ 102 addr = roundup(addr, PAGE_SIZE); 103 104 /* copy our environment */ 105 envp = addr; 106 addr = md_copyenv(addr); 107 108 /* pad to a page boundary */ 109 addr = roundup(addr, PAGE_SIZE); 110 111 kfp = file_findfile(NULL, "elf kernel"); 112 if (kfp == NULL) 113 kfp = file_findfile(NULL, "elf32 kernel"); 114 if (kfp == NULL) 115 panic("can't find kernel file"); 116 kernend = 0; /* fill it in later */ 117 file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto); 118 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp); 119 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend); 120 bios_addsmapdata(kfp); 121#ifdef LOADER_GELI_SUPPORT 122 geli_export_key_metadata(kfp); 123#endif 124 125 /* Figure out the size and location of the metadata */ 126 *modulep = addr; 127 size = md_copymodules(0, false); 128 kernend = roundup(addr + size, PAGE_SIZE); 129 *kernendp = kernend; 130 131 /* patch MODINFOMD_KERNEND */ 132 md = file_findmetadata(kfp, MODINFOMD_KERNEND); 133 bcopy(&kernend, md->md_data, sizeof kernend); 134 135 /* copy module list and metadata */ 136 (void)md_copymodules(addr, false); 137 138 ssym = esym = 0; 139 md = file_findmetadata(kfp, MODINFOMD_SSYM); 140 if (md != NULL) 141 ssym = *((vm_offset_t *)&(md->md_data)); 142 md = file_findmetadata(kfp, MODINFOMD_ESYM); 143 if (md != NULL) 144 esym = *((vm_offset_t *)&(md->md_data)); 145 if (ssym == 0 || esym == 0) 146 ssym = esym = 0; /* sanity */ 147 148 /* legacy bootinfo structure */ 149 kernelname = getenv("kernelname"); 150 userboot_getdev(NULL, kernelname, &kernelpath); 151 bi.bi_version = BOOTINFO_VERSION; 152 bi.bi_size = sizeof(bi); 153 CALLBACK(getmem, &lowmem, &highmem); 154 bi.bi_memsizes_valid = 1; 155 bi.bi_basemem = 640; 156 bi.bi_extmem = (lowmem - 0x100000) / 1024; 157 bi.bi_envp = envp; 158 bi.bi_modulep = *modulep; 159 bi.bi_kernend = kernend; 160 bi.bi_symtab = ssym; /* XXX this is only the primary kernel symtab */ 161 bi.bi_esymtab = esym; 162 163 /* 164 * Copy the legacy bootinfo and kernel name to the guest at 0x2000 165 */ 166 bi.bi_kernelname = 0x2000 + sizeof(bi); 167 CALLBACK(copyin, &bi, 0x2000, sizeof(bi)); 168 CALLBACK(copyin, kernelname, 0x2000 + sizeof(bi), strlen(kernelname) + 1); 169 170 /* legacy boot arguments */ 171 *howtop = howto | RB_BOOTINFO; 172 *bootdevp = bootdevnr; 173 *bip = 0x2000; 174 175 return(0); 176} 177