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robertmh
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1 changed files with 0 additions and 359 deletions
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2004,2005,2006,2007 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 <config.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <stdlib.h>
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#include <string.h>
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#include <grub/elf.h>
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#include <grub/misc.h>
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#include <grub/util/misc.h>
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#include <grub/util/resolve.h>
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#include <grub/kernel.h>
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#include <grub/machine/kernel.h>
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#define GRUB_IEEE1275_NOTE_NAME "PowerPC"
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#define GRUB_IEEE1275_NOTE_TYPE 0x1275
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/* These structures are defined according to the CHRP binding to IEEE1275,
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"Client Program Format" section. */
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struct grub_ieee1275_note_hdr
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{
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grub_uint32_t namesz;
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grub_uint32_t descsz;
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grub_uint32_t type;
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char name[sizeof (GRUB_IEEE1275_NOTE_NAME)];
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};
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struct grub_ieee1275_note_desc
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{
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grub_uint32_t real_mode;
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grub_uint32_t real_base;
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grub_uint32_t real_size;
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grub_uint32_t virt_base;
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grub_uint32_t virt_size;
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grub_uint32_t load_base;
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};
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struct grub_ieee1275_note
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{
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struct grub_ieee1275_note_hdr header;
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struct grub_ieee1275_note_desc descriptor;
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};
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void
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load_note (Elf32_Phdr *phdr, FILE *out)
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{
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struct grub_ieee1275_note note;
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int note_size = sizeof (struct grub_ieee1275_note);
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grub_util_info ("adding CHRP NOTE segment");
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note.header.namesz = grub_cpu_to_be32 (sizeof (GRUB_IEEE1275_NOTE_NAME));
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note.header.descsz = grub_cpu_to_be32 (note_size);
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note.header.type = grub_cpu_to_be32 (GRUB_IEEE1275_NOTE_TYPE);
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strcpy (note.header.name, GRUB_IEEE1275_NOTE_NAME);
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note.descriptor.real_mode = grub_cpu_to_be32 (0xffffffff);
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note.descriptor.real_base = grub_cpu_to_be32 (0x00c00000);
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note.descriptor.real_size = grub_cpu_to_be32 (0xffffffff);
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note.descriptor.virt_base = grub_cpu_to_be32 (0xffffffff);
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note.descriptor.virt_size = grub_cpu_to_be32 (0xffffffff);
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note.descriptor.load_base = grub_cpu_to_be32 (0x00004000);
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/* Write the note data to the new segment. */
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grub_util_write_image_at (¬e, note_size,
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grub_be_to_cpu32 (phdr->p_offset), out);
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/* Fill in the rest of the segment header. */
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phdr->p_type = grub_cpu_to_be32 (PT_NOTE);
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phdr->p_flags = grub_cpu_to_be32 (PF_R);
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phdr->p_align = grub_cpu_to_be32 (sizeof (long));
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phdr->p_vaddr = 0;
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phdr->p_paddr = 0;
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phdr->p_filesz = grub_cpu_to_be32 (note_size);
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phdr->p_memsz = 0;
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}
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void
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load_modules (grub_addr_t modbase, Elf32_Phdr *phdr, const char *dir,
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char *mods[], FILE *out)
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{
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char *module_img;
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struct grub_util_path_list *path_list;
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struct grub_util_path_list *p;
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struct grub_module_info *modinfo;
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size_t offset;
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size_t total_module_size;
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path_list = grub_util_resolve_dependencies (dir, "moddep.lst", mods);
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offset = sizeof (struct grub_module_info);
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total_module_size = sizeof (struct grub_module_info);
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for (p = path_list; p; p = p->next)
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{
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total_module_size += (grub_util_get_image_size (p->name)
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+ sizeof (struct grub_module_header));
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}
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grub_util_info ("the total module size is 0x%x", total_module_size);
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module_img = xmalloc (total_module_size);
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modinfo = (struct grub_module_info *) module_img;
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modinfo->magic = grub_cpu_to_be32 (GRUB_MODULE_MAGIC);
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modinfo->offset = grub_cpu_to_be32 (sizeof (struct grub_module_info));
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modinfo->size = grub_cpu_to_be32 (total_module_size);
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/* Load all the modules, with headers, into module_img. */
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for (p = path_list; p; p = p->next)
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{
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struct grub_module_header *header;
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size_t mod_size;
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grub_util_info ("adding module %s", p->name);
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mod_size = grub_util_get_image_size (p->name);
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header = (struct grub_module_header *) (module_img + offset);
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header->offset = grub_cpu_to_be32 (sizeof (*header));
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header->size = grub_cpu_to_be32 (mod_size + sizeof (*header));
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grub_util_load_image (p->name, module_img + offset + sizeof (*header));
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offset += sizeof (*header) + mod_size;
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}
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/* Write the module data to the new segment. */
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grub_util_write_image_at (module_img, total_module_size,
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grub_cpu_to_be32 (phdr->p_offset), out);
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/* Fill in the rest of the segment header. */
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phdr->p_type = grub_cpu_to_be32 (PT_LOAD);
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phdr->p_flags = grub_cpu_to_be32 (PF_R | PF_W | PF_X);
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phdr->p_align = grub_cpu_to_be32 (sizeof (long));
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phdr->p_vaddr = grub_cpu_to_be32 (modbase);
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phdr->p_paddr = grub_cpu_to_be32 (modbase);
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phdr->p_filesz = grub_cpu_to_be32 (total_module_size);
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phdr->p_memsz = grub_cpu_to_be32 (total_module_size);
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}
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void
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add_segments (char *dir, FILE *out, int chrp, char *mods[])
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{
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Elf32_Ehdr ehdr;
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Elf32_Phdr *phdrs = NULL;
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Elf32_Phdr *phdr;
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FILE *in;
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char *kernel_path;
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grub_addr_t grub_end = 0;
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off_t phdroff;
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int i;
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/* Read ELF header. */
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kernel_path = grub_util_get_path (dir, "kernel.elf");
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in = fopen (kernel_path, "rb");
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if (! in)
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grub_util_error ("cannot open %s", kernel_path);
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grub_util_read_at (&ehdr, sizeof (ehdr), 0, in);
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phdrs = xmalloc (grub_be_to_cpu16 (ehdr.e_phentsize)
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* (grub_be_to_cpu16 (ehdr.e_phnum) + 2));
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/* Copy all existing segments. */
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for (i = 0; i < grub_be_to_cpu16 (ehdr.e_phnum); i++)
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{
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char *segment_img;
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grub_size_t segment_end;
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phdr = phdrs + i;
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/* Read segment header. */
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grub_util_read_at (phdr, sizeof (Elf32_Phdr),
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(grub_be_to_cpu32 (ehdr.e_phoff)
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+ (i * grub_be_to_cpu16 (ehdr.e_phentsize))),
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in);
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grub_util_info ("copying segment %d, type %d", i,
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grub_be_to_cpu32 (phdr->p_type));
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/* Locate _end. */
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segment_end = grub_be_to_cpu32 (phdr->p_paddr)
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+ grub_be_to_cpu32 (phdr->p_memsz);
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grub_util_info ("segment %u end 0x%lx", i, segment_end);
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if (segment_end > grub_end)
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grub_end = segment_end;
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/* Read segment data and write it to new file. */
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segment_img = xmalloc (grub_be_to_cpu32 (phdr->p_filesz));
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grub_util_read_at (segment_img, grub_be_to_cpu32 (phdr->p_filesz),
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grub_be_to_cpu32 (phdr->p_offset), in);
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grub_util_write_image_at (segment_img, grub_be_to_cpu32 (phdr->p_filesz),
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grub_be_to_cpu32 (phdr->p_offset), out);
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free (segment_img);
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}
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if (mods[0] != NULL)
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{
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grub_addr_t modbase;
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/* Place modules just after grub segment. */
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modbase = ALIGN_UP(grub_end, GRUB_IEEE1275_MOD_ALIGN);
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/* Construct new segment header for modules. */
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phdr = phdrs + grub_be_to_cpu16 (ehdr.e_phnum);
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ehdr.e_phnum = grub_cpu_to_be16 (grub_be_to_cpu16 (ehdr.e_phnum) + 1);
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/* Fill in p_offset so the callees know where to write. */
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phdr->p_offset = grub_cpu_to_be32 (ALIGN_UP (grub_util_get_fp_size (out),
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sizeof (long)));
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load_modules (modbase, phdr, dir, mods, out);
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}
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if (chrp)
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{
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/* Construct new segment header for the CHRP note. */
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phdr = phdrs + grub_be_to_cpu16 (ehdr.e_phnum);
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ehdr.e_phnum = grub_cpu_to_be16 (grub_be_to_cpu16 (ehdr.e_phnum) + 1);
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/* Fill in p_offset so the callees know where to write. */
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phdr->p_offset = grub_cpu_to_be32 (ALIGN_UP (grub_util_get_fp_size (out),
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sizeof (long)));
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load_note (phdr, out);
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}
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/* Don't bother preserving the section headers. */
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ehdr.e_shoff = 0;
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ehdr.e_shnum = 0;
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ehdr.e_shstrndx = 0;
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/* Append entire segment table to the file. */
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phdroff = ALIGN_UP (grub_util_get_fp_size (out), sizeof (long));
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grub_util_write_image_at (phdrs, grub_be_to_cpu16 (ehdr.e_phentsize)
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* grub_be_to_cpu16 (ehdr.e_phnum), phdroff,
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out);
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/* Write ELF header. */
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ehdr.e_phoff = grub_cpu_to_be32 (phdroff);
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grub_util_write_image_at (&ehdr, sizeof (ehdr), 0, out);
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free (phdrs);
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free (kernel_path);
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}
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static struct option options[] =
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{
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{"directory", required_argument, 0, 'd'},
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{"output", required_argument, 0, 'o'},
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{"help", no_argument, 0, 'h'},
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{"note", no_argument, 0, 'n'},
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{"version", no_argument, 0, 'V'},
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{"verbose", no_argument, 0, 'v'},
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{ 0, 0, 0, 0 },
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};
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static void
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usage (int status)
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{
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if (status)
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fprintf (stderr, "Try ``grub-mkimage --help'' for more information.\n");
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else
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printf ("\
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Usage: grub-mkimage -o FILE [OPTION]... [MODULES]\n\
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\n\
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Make a bootable image of GRUB.\n\
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\n\
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-d, --directory=DIR use images and modules under DIR [default=%s]\n\
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-o, --output=FILE output a generated image to FILE\n\
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-h, --help display this message and exit\n\
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-n, --note add NOTE segment for CHRP Open Firmware\n\
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-V, --version print version information and exit\n\
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-v, --verbose print verbose messages\n\
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\n\
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Report bugs to <%s>.\n\
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", GRUB_LIBDIR, PACKAGE_BUGREPORT);
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exit (status);
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}
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int
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main (int argc, char *argv[])
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{
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FILE *fp;
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char *output = NULL;
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char *dir = NULL;
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int chrp = 0;
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progname = "grub-mkimage";
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while (1)
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{
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int c = getopt_long (argc, argv, "d:o:hVvn", options, 0);
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if (c == -1)
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break;
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switch (c)
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{
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case 'd':
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if (dir)
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free (dir);
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dir = xstrdup (optarg);
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break;
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case 'h':
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usage (0);
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break;
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case 'n':
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chrp = 1;
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break;
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case 'o':
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if (output)
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free (output);
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output = xstrdup (optarg);
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break;
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case 'V':
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printf ("grub-mkimage (%s) %s\n", PACKAGE_NAME, PACKAGE_VERSION);
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return 0;
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case 'v':
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verbosity++;
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break;
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default:
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usage (1);
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break;
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}
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}
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if (!output)
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usage (1);
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fp = fopen (output, "wb");
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if (! fp)
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grub_util_error ("cannot open %s", output);
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add_segments (dir ? : GRUB_LIBDIR, fp, chrp, argv + optind);
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fclose (fp);
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return 0;
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}
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