/*
* GRUB -- GRand Unified Bootloader
- * Copyright (C) 2002 Yoshinori K. Okuji <okuji@enbug.org>
- * Copyright (C) 2003 Jeroen Dekkers <jeroen@dekkers.cx>
+ * Copyright (C) 2004 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#ifndef GRUB_LOADER_MACHINE_HEADER
#define GRUB_LOADER_MACHINE_HEADER 1
-#include <grub/types.h>
-#include <grub/symbol.h>
-#include <grub/machine/multiboot.h>
+/* The symbol shared between the normal mode and rescue mode
+ loader. */
+void grub_load_linux (int argc, char *argv[]);
-extern grub_uint32_t EXPORT_VAR(grub_linux_prot_size);
-extern char *EXPORT_VAR(grub_linux_tmp_addr);
-extern char *EXPORT_VAR(grub_linux_real_addr);
-
-void EXPORT_FUNC(grub_linux_boot_zimage) (void) __attribute__ ((noreturn));
-void EXPORT_FUNC(grub_linux_boot_bzimage) (void) __attribute__ ((noreturn));
-
-/* This is an asm part of the chainloader. */
-void EXPORT_FUNC(grub_chainloader_real_boot) (int drive, void *part_addr) __attribute__ ((noreturn));
-
-/* The asm part of the multiboot loader. */
-void EXPORT_FUNC(grub_multiboot_real_boot) (grub_addr_t entry,
- struct grub_multiboot_info *mbi)
- __attribute__ ((noreturn));
-
-/* It is necessary to export these functions, because normal mode commands
- reuse rescue mode commands. */
-void grub_rescue_cmd_chainloader (int argc, char *argv[]);
-void grub_rescue_cmd_linux (int argc, char *argv[]);
-void grub_rescue_cmd_initrd (int argc, char *argv[]);
-void grub_rescue_cmd_multiboot (int argc, char *argv[]);
-void grub_rescue_cmd_module (int argc, char *argv[]);
+void grub_linux_init (void);
+void grub_linux_fini (void);
+void grub_linux_normal_init (void);
+void grub_linux_normal_fini (void);
#endif /* ! GRUB_LOADER_MACHINE_HEADER */
--- /dev/null
+/* linux.c - boot Linux */
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <grub/machine/loader.h>
+#include <grub/machine/ieee1275.h>
+#include <grub/elf.h>
+#include <grub/loader.h>
+#include <grub/dl.h>
+#include <grub/mm.h>
+#include <grub/rescue.h>
+#include <grub/misc.h>
+
+static grub_dl_t my_mod;
+
+static int loaded;
+static int vmlinux;
+
+static grub_addr_t initrd_addr;
+static grub_size_t initrd_size;
+
+static grub_addr_t linux_addr;
+static grub_size_t linux_size;
+
+static char *linux_args;
+
+typedef void (*kernel_entry_t) (void *, unsigned long, intptr_t (void *),
+ unsigned long, unsigned long);
+
+static grub_err_t
+grub_linux_boot (void)
+{
+ kernel_entry_t linuxmain;
+ grub_ieee1275_phandle_t chosen;
+ grub_size_t actual;
+
+ struct bi_rec
+ {
+ unsigned long tag;
+ unsigned long size;
+ unsigned long data[0];
+ };
+
+ grub_ieee1275_finddevice ("/chosen", &chosen);
+
+ /* Set the command line arguments. */
+ grub_ieee1275_set_property (chosen, "bootargs", linux_args,
+ grub_strlen (linux_args) + 1, &actual);
+
+ /* Boot the kernel. */
+ linuxmain = (kernel_entry_t) linux_addr;
+ linuxmain ((void *) initrd_addr, initrd_size, grub_ieee1275_entry_fn, 0, 0);
+
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_linux_release_mem (void)
+{
+ grub_free (linux_args);
+ linux_args = 0;
+
+ if (linux_addr && grub_ieee1275_release ((void *) linux_addr, linux_size))
+ return grub_error (GRUB_ERR_OUT_OF_MEMORY, "Can not release memory");
+
+ linux_addr = 0;
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_linux_unload (void)
+{
+ grub_err_t err;
+
+ err = grub_linux_release_mem ();
+ grub_dl_unref (my_mod);
+
+ loaded = 0;
+
+ return err;
+}
+
+void
+grub_load_linux (int argc, char *argv[])
+{
+ grub_file_t file = 0;
+ Elf32_Ehdr ehdr;
+ Elf32_Phdr *phdrs = 0;
+ int i;
+ int offset = 0;
+ static grub_addr_t entry;
+ int size;
+
+ grub_dl_ref (my_mod);
+
+ if (argc == 0)
+ {
+ grub_error (GRUB_ERR_BAD_ARGUMENT, "no kernel specified");
+ goto fail;
+ }
+
+ file = grub_file_open (argv[0]);
+ if (! file)
+ goto fail;
+
+ if (grub_file_read (file, (char *) &ehdr, sizeof (ehdr)) != sizeof (ehdr))
+ {
+ grub_error (GRUB_ERR_READ_ERROR, "cannot read the linux elf header");
+ goto fail;
+ }
+
+ if (!((ehdr.e_ident[EI_MAG0] == ELFMAG0)
+ && (ehdr.e_ident[EI_MAG1] == ELFMAG1)
+ && (ehdr.e_ident[EI_MAG2] == ELFMAG2)
+ && (ehdr.e_ident[EI_MAG3] == ELFMAG3)
+ && (ehdr.e_ident[EI_CLASS] == ELFCLASS32)
+ && (ehdr.e_ident[EI_DATA] == ELFDATA2MSB)
+ && (ehdr.e_ident[EI_VERSION] == EV_CURRENT)
+ && (ehdr.e_type == ET_EXEC) && (ehdr.e_machine == EM_PPC)
+ && (ehdr.e_version == EV_CURRENT)))
+ {
+ grub_error (GRUB_ERR_UNKNOWN_OS, "No valid ELF header found");
+ goto fail;
+ }
+
+ if (ehdr.e_type != ET_EXEC)
+ {
+ grub_error (GRUB_ERR_UNKNOWN_OS,
+ "This ELF file is not of the right type\n");
+ goto fail;
+ }
+
+ if (ehdr.e_machine != EM_PPC)
+ {
+ grub_error (GRUB_ERR_UNKNOWN_OS,
+ "This ELF file is not for the PPC32\n");
+ goto fail;
+ }
+
+ if (ehdr.e_version != EV_CURRENT)
+ {
+ grub_error (GRUB_ERR_UNKNOWN_OS,
+ "Invalid ELF version\n");
+ goto fail;
+ }
+
+ /* Read the sections. */
+ entry = ehdr.e_entry;
+ if (entry == 0xc0000000)
+ {
+ entry = 0x01400000;
+ vmlinux = 1;
+ }
+ else
+ vmlinux = 0;
+
+ phdrs = (Elf32_Phdr *) grub_malloc (ehdr.e_phnum * ehdr.e_phentsize);
+ grub_file_read (file, (void *) phdrs, ehdr.e_phnum * ehdr.e_phentsize);
+
+ /* Release the previously used memory. */
+ grub_loader_unset ();
+
+ /* Determine the amount of memory that is required. */
+ linux_size = 0;
+ for (i = 0; i < ehdr.e_phnum; i++)
+ {
+ Elf32_Phdr *phdr = phdrs + i;
+ /* XXX: Is this calculation correct? */
+ linux_size += phdr->p_memsz + phdr->p_filesz;
+ }
+
+ /* Reserve memory for the kernel. */
+ linux_size += 0x100000;
+
+ if (grub_ieee1275_claim ((void *) entry, linux_size, 0, (void *) &linux_addr) == -1)
+ {
+ grub_error (GRUB_ERR_OUT_OF_MEMORY, "Can not claim memory");
+ goto fail;
+ }
+
+ /* Load every loadable segment in memory. */
+ for (i = 0; i < ehdr.e_phnum; i++)
+ {
+ Elf32_Phdr *phdr = phdrs + i;
+
+ if (phdr->p_type == PT_LOAD)
+ {
+ if (grub_file_seek (file, phdr->p_offset) == -1)
+ {
+ grub_error (GRUB_ERR_BAD_OS, "Invalid offset in program header");
+ goto fail;
+ }
+
+ if (grub_file_read (file, (void *) (((char *) entry) + offset) , phdr->p_filesz)
+ != (grub_ssize_t) phdr->p_filesz)
+ goto fail;
+
+ if (phdr->p_filesz < phdr->p_memsz)
+ grub_memset ((char *) (((char *) entry) + offset) + phdr->p_filesz, 0,
+ phdr->p_memsz - phdr->p_filesz);
+
+ offset += phdr->p_filesz;
+ }
+ }
+
+ size = 0;
+ for (i = 0; i < argc; i++)
+ size += grub_strlen (argv[i]);
+
+ linux_args = grub_malloc (size + argc + 1);
+ if (!linux_args)
+ goto fail;
+
+ for (i = 1; i < argc; i++)
+ {
+ grub_strcat (linux_args, argv[i]);
+ grub_strcat (linux_args, " ");
+ }
+
+ fail:
+
+ if (file)
+ grub_file_close (file);
+
+ grub_free (phdrs);
+
+ if (grub_errno != GRUB_ERR_NONE)
+ {
+ grub_linux_release_mem ();
+ grub_dl_unref (my_mod);
+ loaded = 0;
+ }
+ else
+ {
+ grub_loader_set (grub_linux_boot, grub_linux_unload);
+ initrd_addr = 0xc0000000;
+ loaded = 1;
+ }
+
+ return;
+}
+
+\f
+GRUB_MOD_INIT
+{
+ grub_rescue_register_command ("linux", grub_load_linux,
+ "load a linux kernel");
+ my_mod = mod;
+}
+
+GRUB_MOD_FINI
+{
+ grub_rescue_unregister_command ("linux");
+}
+
+void
+grub_linux_init (void)
+{
+ grub_rescue_register_command ("linux", grub_rescue_cmd_linux,
+ "load a linux kernel");
+}
+
+void
+grub_linux_fini (void)
+{
+ grub_rescue_unregister_command ("linux");
+}
--- /dev/null
+/* linux_normal.c - boot Linux */
+/*
+ * GRUB -- Preliminary Universal Programming Architecture for GRUB
+ * Copyright (C) 2004 Free Software Foundation, Inc.
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <grub/normal.h>
+#include <grub/dl.h>
+#include <grub/machine/loader.h>
+
+static const struct grub_arg_option options[] =
+ {
+ {0, 0, 0, 0, 0, 0}
+ };
+
+static grub_err_t
+grub_cmd_linux (struct grub_arg_list *state __attribute__ ((unused)),
+ int argc, char **args)
+{
+ grub_load_linux (argc, args);
+ return GRUB_ERR_NONE;
+}
+
+GRUB_MOD_INIT
+{
+ (void) mod;
+ grub_register_command ("linux", grub_cmd_linux, GRUB_COMMAND_FLAG_BOTH,
+ "linux [KERNELARGS...]",
+ "Loads linux", options);
+}
+
+GRUB_MOD_FINI
+{
+ grub_unregister_command ("linux");
+}
+
+void
+grub_linux_normal_init (void)
+{
+ grub_register_command ("linux", grub_cmd_linux, GRUB_COMMAND_FLAG_BOTH,
+ "linux [KERNELARGS...]",
+ "Loads linux", options);
+}
+
+void
+grub_linux_normal_fini (void)
+{
+ grub_unregister_command ("linux");
+}
projects / thirdparty / grub.git / commitdiff
