Plan9 support

grub-core/Makefile.core.def

@@ -1146,6 +1146,13 @@ module = {
   enable = x86;
 };
 
+module = {
+  name = plan9;
+  i386_pc = loader/i386/pc/plan9.c;
+  enable = i386_pc;
+};
+
+
 module = {
   name = linux16;
   i386_pc = loader/i386/pc/linux.c;

grub-core/loader/i386/pc/plan9.c

@@ -0,0 +1,219 @@
+/*
+ *  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/dl.h>
+#include <grub/command.h>
+#include <grub/i18n.h>
+#include <grub/video.h>
+#include <grub/mm.h>
+#include <grub/cpu/relocator.h>
+
+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_CONFIG_ADDR       0x001200
+#define GRUB_PLAN9_CONFIG_PATH_SIZE  0x000040
+#define GRUB_PLAN9_CONFIG_MAGIC      "ZORT 0\r\n"
+
+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 zero1;
+  grub_uint32_t entry_addr;
+  grub_uint32_t zero2;
+  grub_uint32_t zero3;
+};
+
+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_uint32_t ebp;
+  grub_uint32_t esi;
+*/
+  };
+  grub_video_set_mode ("text", 0, 0);
+
+  return grub_relocator32_boot (rel, state);
+}
+
+static grub_err_t
+grub_plan9_unload (void)
+{
+  grub_relocator_unload (rel);
+  rel = NULL;
+  grub_dl_unref (my_mod);
+  return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_cmd_plan9 (grub_command_t cmd __attribute__ ((unused)),
+		int argc, char *argv[])
+{
+  grub_file_t file = 0;
+  grub_err_t err;
+  void *mem;
+  grub_uint8_t *ptr;
+  grub_size_t memsize, padsize;
+  struct grub_plan9_header hdr;
+  char *config, *configptr;
+  grub_size_t configsize;
+  int i;
+
+  if (argc == 0)
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, "no file specified");
+
+  grub_dl_ref (my_mod);
+
+  rel = grub_relocator_new ();
+  if (!rel)
+    goto fail;
+
+  file = grub_file_open (argv[0]);
+  if (! file)
+    goto fail;
+
+  if (grub_file_read (file, &hdr, sizeof (hdr)) != (grub_ssize_t) sizeof (hdr))
+    goto fail;
+
+  if (grub_be_to_cpu32 (hdr.magic) != GRUB_PLAN9_MAGIC
+      || hdr.zero1 || hdr.zero2 || hdr.zero3)
+    {
+      grub_error (GRUB_ERR_BAD_OS, "unsupported Plan9");
+      goto fail;
+    }
+
+  memsize = sizeof (hdr);
+  memsize += ALIGN_UP (grub_be_to_cpu32 (hdr.text_size), 16);
+  memsize += ALIGN_UP (grub_be_to_cpu32 (hdr.data_size), 16);
+  memsize += ALIGN_UP(grub_be_to_cpu32 (hdr.bss_size), 16);
+  eip = grub_be_to_cpu32 (hdr.entry_addr) & 0xfffffff;
+
+  /* path */
+  configsize = GRUB_PLAN9_CONFIG_PATH_SIZE;
+  /* magic */
+  configsize += sizeof (GRUB_PLAN9_CONFIG_MAGIC) - 1;
+  for (i = 1; i < argc; i++)
+    configsize += grub_strlen (argv[i]) + 1;
+  /* Terminating \0.  */
+  configsize++;
+
+  {
+    grub_relocator_chunk_t ch;
+    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);
+  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;
+  for (i = 1; i < argc; i++)
+    {
+      configptr = grub_stpcpy (configptr, argv[i]);
+      *configptr++ = '\n';
+    }
+  *configptr = 0;
+
+  {
+    grub_relocator_chunk_t ch;
+    err = grub_relocator_alloc_chunk_addr (rel, &ch, GRUB_PLAN9_TARGET,
+					   memsize);
+    if (err)
+      goto fail;
+    mem = get_virtual_current_address (ch);
+  }
+
+  ptr = mem;
+  grub_memcpy (ptr, &hdr, sizeof (hdr));
+  ptr += sizeof (hdr);
+
+  if (grub_file_read (file, ptr, grub_be_to_cpu32 (hdr.text_size))
+      != (grub_ssize_t) grub_be_to_cpu32 (hdr.text_size))
+    goto fail;
+  ptr += grub_be_to_cpu32 (hdr.text_size);
+  padsize = ALIGN_UP (grub_be_to_cpu32 (hdr.text_size), 16)
+    - grub_be_to_cpu32 (hdr.text_size);
+
+  grub_memset (ptr, 0, padsize);
+  ptr += padsize;
+
+  if (grub_file_read (file, ptr, grub_be_to_cpu32 (hdr.data_size))
+      != (grub_ssize_t) grub_be_to_cpu32 (hdr.data_size))
+    goto fail;
+  ptr += grub_be_to_cpu32 (hdr.data_size);
+  padsize = ALIGN_UP (grub_be_to_cpu32 (hdr.data_size), 16)
+    - 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), 16));
+
+  grub_loader_set (grub_plan9_boot, grub_plan9_unload, 1);
+  return GRUB_ERR_NONE;
+
+ fail:
+
+  if (file)
+    grub_file_close (file);
+
+  grub_plan9_unload ();
+
+  return grub_errno;
+}
+
+static grub_command_t cmd;
+
+GRUB_MOD_INIT(plan9)
+{
+  cmd = grub_register_command ("plan9", grub_cmd_plan9,
+			       0, N_("Load Plan9 kernel."));
+  my_mod = mod;
+}
+
+GRUB_MOD_FINI(plan9)
+{
+  grub_unregister_command (cmd);
+}