596 lines
16 KiB
C
596 lines
16 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/loader.h>
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#include <grub/file.h>
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#include <grub/err.h>
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#include <grub/device.h>
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#include <grub/disk.h>
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#include <grub/misc.h>
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#include <grub/types.h>
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#include <grub/partition.h>
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#include <grub/msdos_partition.h>
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#include <grub/scsi.h>
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#include <grub/dl.h>
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#include <grub/command.h>
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#include <grub/i18n.h>
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#include <grub/video.h>
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#include <grub/mm.h>
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#include <grub/cpu/relocator.h>
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#include <grub/extcmd.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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static grub_dl_t my_mod;
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static struct grub_relocator *rel;
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static grub_uint32_t eip = 0xffffffff;
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#define GRUB_PLAN9_TARGET 0x100000
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#define GRUB_PLAN9_ALIGN 4096
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#define GRUB_PLAN9_CONFIG_ADDR 0x001200
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#define GRUB_PLAN9_CONFIG_PATH_SIZE 0x000040
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#define GRUB_PLAN9_CONFIG_MAGIC "ZORT 0\r\n"
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static const struct grub_arg_option options[] =
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{
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{"map", 'm', GRUB_ARG_OPTION_REPEATABLE,
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/* TRANSLATORS: it's about guessing which GRUB disk
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is which Plan9 disk. If your language has no
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word "mapping" you can use another word which
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means that the GRUBDEVICE and PLAN9DEVICE are
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actually the same device, just named differently
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in OS and GRUB. */
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N_("Override guessed mapping of Plan9 devices."),
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N_("GRUBDEVICE=PLAN9DEVICE"),
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ARG_TYPE_STRING},
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{0, 0, 0, 0, 0, 0}
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};
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struct grub_plan9_header
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{
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grub_uint32_t magic;
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#define GRUB_PLAN9_MAGIC 0x1eb
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grub_uint32_t text_size;
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grub_uint32_t data_size;
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grub_uint32_t bss_size;
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grub_uint32_t sectiona;
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grub_uint32_t entry_addr;
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grub_uint32_t zero;
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grub_uint32_t sectionb;
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};
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static grub_err_t
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grub_plan9_boot (void)
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{
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struct grub_relocator32_state state = {
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.eax = 0,
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.eip = eip,
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.ebx = 0,
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.ecx = 0,
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.edx = 0,
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.edi = 0,
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.esp = 0,
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.ebp = 0,
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.esi = 0
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};
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grub_video_set_mode ("text", 0, 0);
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return grub_relocator32_boot (rel, state, 0);
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}
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static grub_err_t
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grub_plan9_unload (void)
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{
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grub_relocator_unload (rel);
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rel = NULL;
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grub_dl_unref (my_mod);
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return GRUB_ERR_NONE;
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}
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/* Context for grub_cmd_plan9. */
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struct grub_cmd_plan9_ctx
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{
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grub_extcmd_context_t ctxt;
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grub_file_t file;
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char *pmap;
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grub_size_t pmapalloc;
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grub_size_t pmapptr;
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int noslash;
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int prefixescnt[5];
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char *bootdisk, *bootpart;
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};
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static const char prefixes[5][10] = {
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"dos", "plan9", "ntfs", "linux", "linuxswap"
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};
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#include <grub/err.h>
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static inline grub_err_t
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grub_extend_alloc (grub_size_t sz, grub_size_t *allocated, char **ptr)
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{
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void *n;
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if (sz < *allocated)
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return GRUB_ERR_NONE;
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*allocated = 2 * sz;
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n = grub_realloc (*ptr, *allocated);
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if (!n)
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return grub_errno;
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*ptr = n;
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return GRUB_ERR_NONE;
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}
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/* Helper for grub_cmd_plan9. */
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static int
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fill_partition (grub_disk_t disk, const grub_partition_t partition, void *data)
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{
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struct grub_cmd_plan9_ctx *fill_ctx = data;
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int file_disk = 0;
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int pstart, pend;
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if (!fill_ctx->noslash)
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{
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if (grub_extend_alloc (fill_ctx->pmapptr + 1, &fill_ctx->pmapalloc,
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&fill_ctx->pmap))
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return 1;
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fill_ctx->pmap[fill_ctx->pmapptr++] = '/';
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}
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fill_ctx->noslash = 0;
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file_disk = fill_ctx->file->device->disk
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&& disk->id == fill_ctx->file->device->disk->id
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&& disk->dev->id == fill_ctx->file->device->disk->dev->id;
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pstart = fill_ctx->pmapptr;
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if (grub_strcmp (partition->partmap->name, "plan") == 0)
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{
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unsigned ptr = partition->index + sizeof ("part ") - 1;
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grub_err_t err;
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disk->partition = partition->parent;
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do
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{
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if (grub_extend_alloc (fill_ctx->pmapptr + 1, &fill_ctx->pmapalloc,
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&fill_ctx->pmap))
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return 1;
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err = grub_disk_read (disk, 1, ptr, 1,
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fill_ctx->pmap + fill_ctx->pmapptr);
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if (err)
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{
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disk->partition = 0;
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return err;
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}
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ptr++;
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fill_ctx->pmapptr++;
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}
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while (grub_isalpha (fill_ctx->pmap[fill_ctx->pmapptr - 1])
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|| grub_isdigit (fill_ctx->pmap[fill_ctx->pmapptr - 1]));
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fill_ctx->pmapptr--;
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}
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else
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{
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char name[50];
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int c = 0;
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if (grub_strcmp (partition->partmap->name, "msdos") == 0)
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{
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switch (partition->msdostype)
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{
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case GRUB_PC_PARTITION_TYPE_PLAN9:
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c = 1;
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break;
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case GRUB_PC_PARTITION_TYPE_NTFS:
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c = 2;
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break;
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case GRUB_PC_PARTITION_TYPE_MINIX:
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case GRUB_PC_PARTITION_TYPE_LINUX_MINIX:
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case GRUB_PC_PARTITION_TYPE_EXT2FS:
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c = 3;
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break;
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case GRUB_PC_PARTITION_TYPE_LINUX_SWAP:
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c = 4;
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break;
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}
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}
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if (fill_ctx->prefixescnt[c] == 0)
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grub_strcpy (name, prefixes[c]);
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else
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grub_snprintf (name, sizeof (name), "%s.%d", prefixes[c],
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fill_ctx->prefixescnt[c]);
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fill_ctx->prefixescnt[c]++;
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if (grub_extend_alloc (fill_ctx->pmapptr + grub_strlen (name) + 1,
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&fill_ctx->pmapalloc, &fill_ctx->pmap))
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return 1;
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grub_strcpy (fill_ctx->pmap + fill_ctx->pmapptr, name);
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fill_ctx->pmapptr += grub_strlen (name);
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}
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pend = fill_ctx->pmapptr;
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if (grub_extend_alloc (fill_ctx->pmapptr + 2 + 25 + 5 + 25,
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&fill_ctx->pmapalloc, &fill_ctx->pmap))
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return 1;
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fill_ctx->pmap[fill_ctx->pmapptr++] = ' ';
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grub_snprintf (fill_ctx->pmap + fill_ctx->pmapptr, 25 + 5 + 25,
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"%" PRIuGRUB_UINT64_T " %" PRIuGRUB_UINT64_T,
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grub_partition_get_start (partition),
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grub_partition_get_start (partition)
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+ grub_partition_get_len (partition));
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if (file_disk && grub_partition_get_start (partition)
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== grub_partition_get_start (fill_ctx->file->device->disk->partition)
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&& grub_partition_get_len (partition)
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== grub_partition_get_len (fill_ctx->file->device->disk->partition))
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{
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grub_free (fill_ctx->bootpart);
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fill_ctx->bootpart = grub_strndup (fill_ctx->pmap + pstart,
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pend - pstart);
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}
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fill_ctx->pmapptr += grub_strlen (fill_ctx->pmap + fill_ctx->pmapptr);
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return 0;
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}
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/* Helper for grub_cmd_plan9. */
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static int
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fill_disk (const char *name, void *data)
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{
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struct grub_cmd_plan9_ctx *fill_ctx = data;
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grub_device_t dev;
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char *plan9name = NULL;
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unsigned i;
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int file_disk = 0;
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dev = grub_device_open (name);
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if (!dev)
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{
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grub_print_error ();
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return 0;
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}
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if (!dev->disk)
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{
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grub_device_close (dev);
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return 0;
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}
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file_disk = fill_ctx->file->device->disk
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&& dev->disk->id == fill_ctx->file->device->disk->id
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&& dev->disk->dev->id == fill_ctx->file->device->disk->dev->id;
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for (i = 0;
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fill_ctx->ctxt->state[0].args && fill_ctx->ctxt->state[0].args[i]; i++)
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if (grub_strncmp (name, fill_ctx->ctxt->state[0].args[i],
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grub_strlen (name)) == 0
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&& fill_ctx->ctxt->state[0].args[i][grub_strlen (name)] == '=')
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break;
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if (fill_ctx->ctxt->state[0].args && fill_ctx->ctxt->state[0].args[i])
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plan9name = grub_strdup (fill_ctx->ctxt->state[0].args[i]
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+ grub_strlen (name) + 1);
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else
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switch (dev->disk->dev->id)
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{
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case GRUB_DISK_DEVICE_BIOSDISK_ID:
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if (dev->disk->id & 0x80)
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plan9name = grub_xasprintf ("sdB%u",
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(unsigned) (dev->disk->id & 0x7f));
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else
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plan9name = grub_xasprintf ("fd%u",
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(unsigned) (dev->disk->id & 0x7f));
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break;
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/* Shouldn't happen as Plan9 doesn't work on these platforms. */
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case GRUB_DISK_DEVICE_OFDISK_ID:
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case GRUB_DISK_DEVICE_EFIDISK_ID:
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/* Plan9 doesn't see those. */
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default:
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/* Not sure how to handle those. */
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case GRUB_DISK_DEVICE_NAND_ID:
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if (!file_disk)
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{
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grub_device_close (dev);
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return 0;
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}
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/* if it's the disk the kernel is loaded from we need to name
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it nevertheless. */
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plan9name = grub_strdup ("sdZ0");
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break;
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case GRUB_DISK_DEVICE_ATA_ID:
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{
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unsigned unit;
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if (grub_strlen (dev->disk->name) < sizeof ("ata0") - 1)
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unit = 0;
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else
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unit = grub_strtoul (dev->disk->name + sizeof ("ata0") - 1, 0, 0);
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plan9name = grub_xasprintf ("sd%c%d", 'C' + unit / 2, unit % 2);
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}
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break;
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case GRUB_DISK_DEVICE_SCSI_ID:
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if (((dev->disk->id >> GRUB_SCSI_ID_SUBSYSTEM_SHIFT) & 0xff)
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== GRUB_SCSI_SUBSYSTEM_PATA)
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{
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unsigned unit;
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if (grub_strlen (dev->disk->name) < sizeof ("ata0") - 1)
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unit = 0;
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else
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unit = grub_strtoul (dev->disk->name + sizeof ("ata0") - 1,
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0, 0);
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plan9name = grub_xasprintf ("sd%c%d", 'C' + unit / 2, unit % 2);
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break;
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}
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/* FIXME: how does Plan9 number controllers?
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We probably need save the SCSI devices and sort them */
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plan9name
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= grub_xasprintf ("sd0%u", (unsigned)
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((dev->disk->id >> GRUB_SCSI_ID_BUS_SHIFT)
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& 0xf));
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break;
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}
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if (!plan9name)
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{
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grub_print_error ();
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grub_device_close (dev);
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return 0;
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}
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if (grub_extend_alloc (fill_ctx->pmapptr + grub_strlen (plan9name)
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+ sizeof ("part="), &fill_ctx->pmapalloc,
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&fill_ctx->pmap))
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{
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grub_free (plan9name);
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grub_device_close (dev);
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return 1;
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}
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grub_strcpy (fill_ctx->pmap + fill_ctx->pmapptr, plan9name);
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fill_ctx->pmapptr += grub_strlen (plan9name);
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if (!file_disk)
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grub_free (plan9name);
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else
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{
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grub_free (fill_ctx->bootdisk);
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fill_ctx->bootdisk = plan9name;
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}
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grub_strcpy (fill_ctx->pmap + fill_ctx->pmapptr, "part=");
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fill_ctx->pmapptr += sizeof ("part=") - 1;
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fill_ctx->noslash = 1;
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grub_memset (fill_ctx->prefixescnt, 0, sizeof (fill_ctx->prefixescnt));
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if (grub_partition_iterate (dev->disk, fill_partition, fill_ctx))
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{
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grub_device_close (dev);
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return 1;
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}
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if (grub_extend_alloc (fill_ctx->pmapptr + 1, &fill_ctx->pmapalloc,
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&fill_ctx->pmap))
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{
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grub_device_close (dev);
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return 1;
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}
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fill_ctx->pmap[fill_ctx->pmapptr++] = '\n';
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grub_device_close (dev);
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return 0;
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}
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static grub_err_t
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grub_cmd_plan9 (grub_extcmd_context_t ctxt, int argc, char *argv[])
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{
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struct grub_cmd_plan9_ctx fill_ctx = {
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.ctxt = ctxt,
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.file = 0,
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.pmap = NULL,
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.pmapalloc = 256,
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.pmapptr = 0,
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.noslash = 1,
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.bootdisk = NULL,
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.bootpart = NULL
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};
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void *mem;
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grub_size_t memsize, padsize;
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struct grub_plan9_header hdr;
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char *config, *configptr;
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grub_size_t configsize;
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char *bootpath = NULL;
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if (argc == 0)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
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grub_dl_ref (my_mod);
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rel = grub_relocator_new ();
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if (!rel)
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goto fail;
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fill_ctx.file = grub_file_open (argv[0]);
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if (! fill_ctx.file)
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goto fail;
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fill_ctx.pmap = grub_malloc (fill_ctx.pmapalloc);
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if (!fill_ctx.pmap)
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goto fail;
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if (grub_disk_dev_iterate (fill_disk, &fill_ctx))
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goto fail;
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if (grub_extend_alloc (fill_ctx.pmapptr + 1, &fill_ctx.pmapalloc,
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&fill_ctx.pmap))
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goto fail;
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fill_ctx.pmap[fill_ctx.pmapptr] = 0;
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{
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char *file_name = grub_strchr (argv[0], ')');
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if (file_name)
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file_name++;
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else
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file_name = argv[0];
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if (*file_name)
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file_name++;
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if (fill_ctx.bootpart)
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bootpath = grub_xasprintf ("%s!%s!%s", fill_ctx.bootdisk,
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fill_ctx.bootpart, file_name);
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else
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bootpath = grub_xasprintf ("%s!%s", fill_ctx.bootdisk, file_name);
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grub_free (fill_ctx.bootdisk);
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grub_free (fill_ctx.bootpart);
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}
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if (!bootpath)
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goto fail;
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if (grub_file_read (fill_ctx.file, &hdr,
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sizeof (hdr)) != (grub_ssize_t) sizeof (hdr))
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{
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if (!grub_errno)
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grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
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argv[0]);
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goto fail;
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}
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if (grub_be_to_cpu32 (hdr.magic) != GRUB_PLAN9_MAGIC
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|| hdr.zero)
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{
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grub_error (GRUB_ERR_BAD_OS, "unsupported Plan9");
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goto fail;
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}
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memsize = ALIGN_UP (grub_be_to_cpu32 (hdr.text_size) + sizeof (hdr),
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GRUB_PLAN9_ALIGN);
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memsize += ALIGN_UP (grub_be_to_cpu32 (hdr.data_size), GRUB_PLAN9_ALIGN);
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memsize += ALIGN_UP(grub_be_to_cpu32 (hdr.bss_size), GRUB_PLAN9_ALIGN);
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eip = grub_be_to_cpu32 (hdr.entry_addr) & 0xfffffff;
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/* path */
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configsize = GRUB_PLAN9_CONFIG_PATH_SIZE;
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/* magic */
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configsize += sizeof (GRUB_PLAN9_CONFIG_MAGIC) - 1;
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{
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int i;
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for (i = 1; i < argc; i++)
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configsize += grub_strlen (argv[i]) + 1;
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}
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configsize += (sizeof ("bootfile=") - 1) + grub_strlen (bootpath) + 1;
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configsize += fill_ctx.pmapptr;
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/* Terminating \0. */
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configsize++;
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{
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grub_relocator_chunk_t ch;
|
|
grub_err_t err;
|
|
err = grub_relocator_alloc_chunk_addr (rel, &ch, GRUB_PLAN9_CONFIG_ADDR,
|
|
configsize);
|
|
if (err)
|
|
goto fail;
|
|
config = get_virtual_current_address (ch);
|
|
}
|
|
|
|
grub_memset (config, 0, GRUB_PLAN9_CONFIG_PATH_SIZE);
|
|
grub_strncpy (config, bootpath, GRUB_PLAN9_CONFIG_PATH_SIZE - 1);
|
|
|
|
configptr = config + GRUB_PLAN9_CONFIG_PATH_SIZE;
|
|
grub_memcpy (configptr, GRUB_PLAN9_CONFIG_MAGIC,
|
|
sizeof (GRUB_PLAN9_CONFIG_MAGIC) - 1);
|
|
configptr += sizeof (GRUB_PLAN9_CONFIG_MAGIC) - 1;
|
|
configptr = grub_stpcpy (configptr, "bootfile=");
|
|
configptr = grub_stpcpy (configptr, bootpath);
|
|
*configptr++ = '\n';
|
|
{
|
|
int i;
|
|
for (i = 1; i < argc; i++)
|
|
{
|
|
configptr = grub_stpcpy (configptr, argv[i]);
|
|
*configptr++ = '\n';
|
|
}
|
|
}
|
|
configptr = grub_stpcpy (configptr, fill_ctx.pmap);
|
|
|
|
{
|
|
grub_relocator_chunk_t ch;
|
|
grub_err_t err;
|
|
|
|
err = grub_relocator_alloc_chunk_addr (rel, &ch, GRUB_PLAN9_TARGET,
|
|
memsize);
|
|
if (err)
|
|
goto fail;
|
|
mem = get_virtual_current_address (ch);
|
|
}
|
|
|
|
{
|
|
grub_uint8_t *ptr;
|
|
ptr = mem;
|
|
grub_memcpy (ptr, &hdr, sizeof (hdr));
|
|
ptr += sizeof (hdr);
|
|
|
|
if (grub_file_read (fill_ctx.file, ptr, grub_be_to_cpu32 (hdr.text_size))
|
|
!= (grub_ssize_t) grub_be_to_cpu32 (hdr.text_size))
|
|
{
|
|
if (!grub_errno)
|
|
grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
|
|
argv[0]);
|
|
goto fail;
|
|
}
|
|
ptr += grub_be_to_cpu32 (hdr.text_size);
|
|
padsize = ALIGN_UP (grub_be_to_cpu32 (hdr.text_size) + sizeof (hdr),
|
|
GRUB_PLAN9_ALIGN) - grub_be_to_cpu32 (hdr.text_size)
|
|
- sizeof (hdr);
|
|
|
|
grub_memset (ptr, 0, padsize);
|
|
ptr += padsize;
|
|
|
|
if (grub_file_read (fill_ctx.file, ptr, grub_be_to_cpu32 (hdr.data_size))
|
|
!= (grub_ssize_t) grub_be_to_cpu32 (hdr.data_size))
|
|
{
|
|
if (!grub_errno)
|
|
grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
|
|
argv[0]);
|
|
goto fail;
|
|
}
|
|
ptr += grub_be_to_cpu32 (hdr.data_size);
|
|
padsize = ALIGN_UP (grub_be_to_cpu32 (hdr.data_size), GRUB_PLAN9_ALIGN)
|
|
- grub_be_to_cpu32 (hdr.data_size);
|
|
|
|
grub_memset (ptr, 0, padsize);
|
|
ptr += padsize;
|
|
grub_memset (ptr, 0, ALIGN_UP(grub_be_to_cpu32 (hdr.bss_size),
|
|
GRUB_PLAN9_ALIGN));
|
|
}
|
|
grub_loader_set (grub_plan9_boot, grub_plan9_unload, 1);
|
|
return GRUB_ERR_NONE;
|
|
|
|
fail:
|
|
grub_free (fill_ctx.pmap);
|
|
|
|
if (fill_ctx.file)
|
|
grub_file_close (fill_ctx.file);
|
|
|
|
grub_plan9_unload ();
|
|
|
|
return grub_errno;
|
|
}
|
|
|
|
static grub_extcmd_t cmd;
|
|
|
|
GRUB_MOD_INIT(plan9)
|
|
{
|
|
cmd = grub_register_extcmd ("plan9", grub_cmd_plan9,
|
|
GRUB_COMMAND_OPTIONS_AT_START,
|
|
N_("KERNEL ARGS"), N_("Load Plan9 kernel."),
|
|
options);
|
|
my_mod = mod;
|
|
}
|
|
|
|
GRUB_MOD_FINI(plan9)
|
|
{
|
|
grub_unregister_extcmd (cmd);
|
|
}
|