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-rw-r--r--grub-core/loader/i386/pc/plan9.c607
1 files changed, 607 insertions, 0 deletions
diff --git a/grub-core/loader/i386/pc/plan9.c b/grub-core/loader/i386/pc/plan9.c
new file mode 100644
index 0000000..3755015
--- /dev/null
+++ b/grub-core/loader/i386/pc/plan9.c
@@ -0,0 +1,607 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2010 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/loader.h>
+#include <grub/file.h>
+#include <grub/err.h>
+#include <grub/device.h>
+#include <grub/disk.h>
+#include <grub/misc.h>
+#include <grub/types.h>
+#include <grub/partition.h>
+#include <grub/msdos_partition.h>
+#include <grub/scsi.h>
+#include <grub/dl.h>
+#include <grub/command.h>
+#include <grub/i18n.h>
+#include <grub/video.h>
+#include <grub/mm.h>
+#include <grub/cpu/relocator.h>
+#include <grub/extcmd.h>
+#include <grub/verify.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static grub_dl_t my_mod;
+static struct grub_relocator *rel;
+static grub_uint32_t eip = 0xffffffff;
+
+#define GRUB_PLAN9_TARGET 0x100000
+#define GRUB_PLAN9_ALIGN 4096
+#define GRUB_PLAN9_CONFIG_ADDR 0x001200
+#define GRUB_PLAN9_CONFIG_PATH_SIZE 0x000040
+#define GRUB_PLAN9_CONFIG_MAGIC "ZORT 0\r\n"
+
+static const struct grub_arg_option options[] =
+ {
+ {"map", 'm', GRUB_ARG_OPTION_REPEATABLE,
+ /* TRANSLATORS: it's about guessing which GRUB disk
+ is which Plan9 disk. If your language has no
+ word "mapping" you can use another word which
+ means that the GRUBDEVICE and PLAN9DEVICE are
+ actually the same device, just named differently
+ in OS and GRUB. */
+ N_("Override guessed mapping of Plan9 devices."),
+ N_("GRUBDEVICE=PLAN9DEVICE"),
+ ARG_TYPE_STRING},
+ {0, 0, 0, 0, 0, 0}
+ };
+
+struct grub_plan9_header
+{
+ grub_uint32_t magic;
+#define GRUB_PLAN9_MAGIC 0x1eb
+ grub_uint32_t text_size;
+ grub_uint32_t data_size;
+ grub_uint32_t bss_size;
+ grub_uint32_t sectiona;
+ grub_uint32_t entry_addr;
+ grub_uint32_t zero;
+ grub_uint32_t sectionb;
+};
+
+static grub_err_t
+grub_plan9_boot (void)
+{
+ struct grub_relocator32_state state = {
+ .eax = 0,
+ .eip = eip,
+ .ebx = 0,
+ .ecx = 0,
+ .edx = 0,
+ .edi = 0,
+ .esp = 0,
+ .ebp = 0,
+ .esi = 0
+ };
+ grub_video_set_mode ("text", 0, 0);
+
+ return grub_relocator32_boot (rel, state, 0);
+}
+
+static grub_err_t
+grub_plan9_unload (void)
+{
+ grub_relocator_unload (rel);
+ rel = NULL;
+ grub_dl_unref (my_mod);
+ return GRUB_ERR_NONE;
+}
+
+/* Context for grub_cmd_plan9. */
+struct grub_cmd_plan9_ctx
+{
+ grub_extcmd_context_t ctxt;
+ grub_file_t file;
+ char *pmap;
+ grub_size_t pmapalloc;
+ grub_size_t pmapptr;
+ int noslash;
+ int prefixescnt[5];
+ char *bootdisk, *bootpart;
+};
+
+static const char prefixes[5][10] = {
+ "dos", "plan9", "ntfs", "linux", "linuxswap"
+};
+
+#include <grub/err.h>
+
+static inline grub_err_t
+grub_extend_alloc (grub_size_t sz, grub_size_t *allocated, char **ptr)
+{
+ void *n;
+ if (sz < *allocated)
+ return GRUB_ERR_NONE;
+
+ *allocated = 2 * sz;
+ n = grub_realloc (*ptr, *allocated);
+ if (!n)
+ return grub_errno;
+ *ptr = n;
+ return GRUB_ERR_NONE;
+}
+
+/* Helper for grub_cmd_plan9. */
+static int
+fill_partition (grub_disk_t disk, const grub_partition_t partition, void *data)
+{
+ struct grub_cmd_plan9_ctx *fill_ctx = data;
+ int file_disk = 0;
+ int pstart, pend;
+
+ if (!fill_ctx->noslash)
+ {
+ if (grub_extend_alloc (fill_ctx->pmapptr + 1, &fill_ctx->pmapalloc,
+ &fill_ctx->pmap))
+ return 1;
+ fill_ctx->pmap[fill_ctx->pmapptr++] = '/';
+ }
+ fill_ctx->noslash = 0;
+
+ file_disk = fill_ctx->file->device->disk
+ && disk->id == fill_ctx->file->device->disk->id
+ && disk->dev->id == fill_ctx->file->device->disk->dev->id;
+
+ pstart = fill_ctx->pmapptr;
+ if (grub_strcmp (partition->partmap->name, "plan") == 0)
+ {
+ unsigned ptr = partition->index + sizeof ("part ") - 1;
+ grub_err_t err;
+ disk->partition = partition->parent;
+ do
+ {
+ if (grub_extend_alloc (fill_ctx->pmapptr + 1, &fill_ctx->pmapalloc,
+ &fill_ctx->pmap))
+ return 1;
+ err = grub_disk_read (disk, 1, ptr, 1,
+ fill_ctx->pmap + fill_ctx->pmapptr);
+ if (err)
+ {
+ disk->partition = 0;
+ return err;
+ }
+ ptr++;
+ fill_ctx->pmapptr++;
+ }
+ while (grub_isalpha (fill_ctx->pmap[fill_ctx->pmapptr - 1])
+ || grub_isdigit (fill_ctx->pmap[fill_ctx->pmapptr - 1]));
+ fill_ctx->pmapptr--;
+ }
+ else
+ {
+ char name[50];
+ int c = 0;
+ if (grub_strcmp (partition->partmap->name, "msdos") == 0)
+ {
+ switch (partition->msdostype)
+ {
+ case GRUB_PC_PARTITION_TYPE_PLAN9:
+ c = 1;
+ break;
+ case GRUB_PC_PARTITION_TYPE_NTFS:
+ c = 2;
+ break;
+ case GRUB_PC_PARTITION_TYPE_MINIX:
+ case GRUB_PC_PARTITION_TYPE_LINUX_MINIX:
+ case GRUB_PC_PARTITION_TYPE_EXT2FS:
+ c = 3;
+ break;
+ case GRUB_PC_PARTITION_TYPE_LINUX_SWAP:
+ c = 4;
+ break;
+ }
+ }
+
+ if (fill_ctx->prefixescnt[c] == 0)
+ grub_strcpy (name, prefixes[c]);
+ else
+ grub_snprintf (name, sizeof (name), "%s.%d", prefixes[c],
+ fill_ctx->prefixescnt[c]);
+ fill_ctx->prefixescnt[c]++;
+ if (grub_extend_alloc (fill_ctx->pmapptr + grub_strlen (name) + 1,
+ &fill_ctx->pmapalloc, &fill_ctx->pmap))
+ return 1;
+ grub_strcpy (fill_ctx->pmap + fill_ctx->pmapptr, name);
+ fill_ctx->pmapptr += grub_strlen (name);
+ }
+ pend = fill_ctx->pmapptr;
+ if (grub_extend_alloc (fill_ctx->pmapptr + 2 + 25 + 5 + 25,
+ &fill_ctx->pmapalloc, &fill_ctx->pmap))
+ return 1;
+ fill_ctx->pmap[fill_ctx->pmapptr++] = ' ';
+ grub_snprintf (fill_ctx->pmap + fill_ctx->pmapptr, 25 + 5 + 25,
+ "%" PRIuGRUB_UINT64_T " %" PRIuGRUB_UINT64_T,
+ grub_partition_get_start (partition),
+ grub_partition_get_start (partition)
+ + grub_partition_get_len (partition));
+ if (file_disk && grub_partition_get_start (partition)
+ == grub_partition_get_start (fill_ctx->file->device->disk->partition)
+ && grub_partition_get_len (partition)
+ == grub_partition_get_len (fill_ctx->file->device->disk->partition))
+ {
+ grub_free (fill_ctx->bootpart);
+ fill_ctx->bootpart = grub_strndup (fill_ctx->pmap + pstart,
+ pend - pstart);
+ }
+
+ fill_ctx->pmapptr += grub_strlen (fill_ctx->pmap + fill_ctx->pmapptr);
+ return 0;
+}
+
+/* Helper for grub_cmd_plan9. */
+static int
+fill_disk (const char *name, void *data)
+{
+ struct grub_cmd_plan9_ctx *fill_ctx = data;
+ grub_device_t dev;
+ char *plan9name = NULL;
+ unsigned i;
+ int file_disk = 0;
+
+ dev = grub_device_open (name);
+ if (!dev)
+ {
+ grub_print_error ();
+ return 0;
+ }
+ if (!dev->disk)
+ {
+ grub_device_close (dev);
+ return 0;
+ }
+ file_disk = fill_ctx->file->device->disk
+ && dev->disk->id == fill_ctx->file->device->disk->id
+ && dev->disk->dev->id == fill_ctx->file->device->disk->dev->id;
+ for (i = 0;
+ fill_ctx->ctxt->state[0].args && fill_ctx->ctxt->state[0].args[i]; i++)
+ if (grub_strncmp (name, fill_ctx->ctxt->state[0].args[i],
+ grub_strlen (name)) == 0
+ && fill_ctx->ctxt->state[0].args[i][grub_strlen (name)] == '=')
+ break;
+ if (fill_ctx->ctxt->state[0].args && fill_ctx->ctxt->state[0].args[i])
+ plan9name = grub_strdup (fill_ctx->ctxt->state[0].args[i]
+ + grub_strlen (name) + 1);
+ else
+ switch (dev->disk->dev->id)
+ {
+ case GRUB_DISK_DEVICE_BIOSDISK_ID:
+ if (dev->disk->id & 0x80)
+ plan9name = grub_xasprintf ("sdB%u",
+ (unsigned) (dev->disk->id & 0x7f));
+ else
+ plan9name = grub_xasprintf ("fd%u",
+ (unsigned) (dev->disk->id & 0x7f));
+ break;
+ /* Shouldn't happen as Plan9 doesn't work on these platforms. */
+ case GRUB_DISK_DEVICE_OFDISK_ID:
+ case GRUB_DISK_DEVICE_EFIDISK_ID:
+
+ /* Plan9 doesn't see those. */
+ default:
+
+ /* Not sure how to handle those. */
+ case GRUB_DISK_DEVICE_NAND_ID:
+ if (!file_disk)
+ {
+ grub_device_close (dev);
+ return 0;
+ }
+
+ /* if it's the disk the kernel is loaded from we need to name
+ it nevertheless. */
+ plan9name = grub_strdup ("sdZ0");
+ break;
+
+ case GRUB_DISK_DEVICE_ATA_ID:
+ {
+ unsigned unit;
+ if (grub_strlen (dev->disk->name) < sizeof ("ata0") - 1)
+ unit = 0;
+ else
+ unit = grub_strtoul (dev->disk->name + sizeof ("ata0") - 1, 0, 0);
+ plan9name = grub_xasprintf ("sd%c%d", 'C' + unit / 2, unit % 2);
+ }
+ break;
+ case GRUB_DISK_DEVICE_SCSI_ID:
+ if (((dev->disk->id >> GRUB_SCSI_ID_SUBSYSTEM_SHIFT) & 0xff)
+ == GRUB_SCSI_SUBSYSTEM_PATA)
+ {
+ unsigned unit;
+ if (grub_strlen (dev->disk->name) < sizeof ("ata0") - 1)
+ unit = 0;
+ else
+ unit = grub_strtoul (dev->disk->name + sizeof ("ata0") - 1,
+ 0, 0);
+ plan9name = grub_xasprintf ("sd%c%d", 'C' + unit / 2, unit % 2);
+ break;
+ }
+
+ /* FIXME: how does Plan9 number controllers?
+ We probably need save the SCSI devices and sort them */
+ plan9name
+ = grub_xasprintf ("sd0%u", (unsigned)
+ ((dev->disk->id >> GRUB_SCSI_ID_BUS_SHIFT)
+ & 0xf));
+ break;
+ }
+ if (!plan9name)
+ {
+ grub_print_error ();
+ grub_device_close (dev);
+ return 0;
+ }
+ if (grub_extend_alloc (fill_ctx->pmapptr + grub_strlen (plan9name)
+ + sizeof ("part="), &fill_ctx->pmapalloc,
+ &fill_ctx->pmap))
+ {
+ grub_free (plan9name);
+ grub_device_close (dev);
+ return 1;
+ }
+ grub_strcpy (fill_ctx->pmap + fill_ctx->pmapptr, plan9name);
+ fill_ctx->pmapptr += grub_strlen (plan9name);
+ if (!file_disk)
+ grub_free (plan9name);
+ else
+ {
+ grub_free (fill_ctx->bootdisk);
+ fill_ctx->bootdisk = plan9name;
+ }
+ grub_strcpy (fill_ctx->pmap + fill_ctx->pmapptr, "part=");
+ fill_ctx->pmapptr += sizeof ("part=") - 1;
+
+ fill_ctx->noslash = 1;
+ grub_memset (fill_ctx->prefixescnt, 0, sizeof (fill_ctx->prefixescnt));
+ if (grub_partition_iterate (dev->disk, fill_partition, fill_ctx))
+ {
+ grub_device_close (dev);
+ return 1;
+ }
+ if (grub_extend_alloc (fill_ctx->pmapptr + 1, &fill_ctx->pmapalloc,
+ &fill_ctx->pmap))
+ {
+ grub_device_close (dev);
+ return 1;
+ }
+ fill_ctx->pmap[fill_ctx->pmapptr++] = '\n';
+
+ grub_device_close (dev);
+ return 0;
+}
+
+static grub_err_t
+grub_cmd_plan9 (grub_extcmd_context_t ctxt, int argc, char *argv[])
+{
+ struct grub_cmd_plan9_ctx fill_ctx = {
+ .ctxt = ctxt,
+ .file = 0,
+ .pmap = NULL,
+ .pmapalloc = 256,
+ .pmapptr = 0,
+ .noslash = 1,
+ .bootdisk = NULL,
+ .bootpart = NULL
+ };
+ void *mem;
+ grub_size_t memsize, padsize;
+ struct grub_plan9_header hdr;
+ char *config, *configptr;
+ grub_size_t configsize;
+ char *bootpath = NULL;
+
+ if (argc == 0)
+ return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
+
+ grub_dl_ref (my_mod);
+
+ rel = grub_relocator_new ();
+ if (!rel)
+ goto fail;
+
+ fill_ctx.file = grub_file_open (argv[0], GRUB_FILE_TYPE_PLAN9_KERNEL);
+ if (! fill_ctx.file)
+ goto fail;
+
+ fill_ctx.pmap = grub_malloc (fill_ctx.pmapalloc);
+ if (!fill_ctx.pmap)
+ goto fail;
+
+ if (grub_disk_dev_iterate (fill_disk, &fill_ctx))
+ goto fail;
+
+ if (grub_extend_alloc (fill_ctx.pmapptr + 1, &fill_ctx.pmapalloc,
+ &fill_ctx.pmap))
+ goto fail;
+ fill_ctx.pmap[fill_ctx.pmapptr] = 0;
+
+ {
+ char *file_name = grub_strchr (argv[0], ')');
+ if (file_name)
+ file_name++;
+ else
+ file_name = argv[0];
+ if (*file_name)
+ file_name++;
+
+ if (fill_ctx.bootpart)
+ bootpath = grub_xasprintf ("%s!%s!%s", fill_ctx.bootdisk,
+ fill_ctx.bootpart, file_name);
+ else
+ bootpath = grub_xasprintf ("%s!%s", fill_ctx.bootdisk, file_name);
+ grub_free (fill_ctx.bootdisk);
+ grub_free (fill_ctx.bootpart);
+ }
+ if (!bootpath)
+ goto fail;
+
+ if (grub_file_read (fill_ctx.file, &hdr,
+ sizeof (hdr)) != (grub_ssize_t) sizeof (hdr))
+ {
+ if (!grub_errno)
+ grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
+ argv[0]);
+ goto fail;
+ }
+
+ if (grub_be_to_cpu32 (hdr.magic) != GRUB_PLAN9_MAGIC
+ || hdr.zero)
+ {
+ grub_error (GRUB_ERR_BAD_OS, "unsupported Plan9");
+ goto fail;
+ }
+
+ memsize = ALIGN_UP (grub_be_to_cpu32 (hdr.text_size) + sizeof (hdr),
+ GRUB_PLAN9_ALIGN);
+ memsize += ALIGN_UP (grub_be_to_cpu32 (hdr.data_size), GRUB_PLAN9_ALIGN);
+ memsize += ALIGN_UP(grub_be_to_cpu32 (hdr.bss_size), GRUB_PLAN9_ALIGN);
+ eip = grub_be_to_cpu32 (hdr.entry_addr) & 0xfffffff;
+
+ /* path */
+ configsize = GRUB_PLAN9_CONFIG_PATH_SIZE;
+ /* magic */
+ configsize += sizeof (GRUB_PLAN9_CONFIG_MAGIC) - 1;
+ {
+ int i;
+ for (i = 1; i < argc; i++)
+ configsize += grub_strlen (argv[i]) + 1;
+ }
+ configsize += (sizeof ("bootfile=") - 1) + grub_strlen (bootpath) + 1;
+ configsize += fill_ctx.pmapptr;
+ /* Terminating \0. */
+ configsize++;
+
+ {
+ 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';
+ char *cmdline = configptr;
+ {
+ int i;
+ for (i = 1; i < argc; i++)
+ {
+ configptr = grub_stpcpy (configptr, argv[i]);
+ *configptr++ = '\n';
+ }
+ }
+
+ {
+ grub_err_t err;
+ *configptr = '\0';
+ err = grub_verify_string (cmdline, GRUB_VERIFY_KERNEL_CMDLINE);
+ if (err)
+ goto fail;
+ }
+
+ 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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-05 00:24:46 +0000