Adding upstream version 2.06.upstream/2.06upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 573 insertions, 0 deletions

diff --git a/util/grub-pe2elf.c b/util/grub-pe2elf.c
new file mode 100644
index 0000000..1133129
--- /dev/null
+++ b/util/grub-pe2elf.c
@@ -0,0 +1,573 @@
+/* grub-pe2elf.c - tool to convert pe image to elf.  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2008,2009 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 <config.h>
+#include <grub/types.h>
+#include <grub/util/misc.h>
+#include <grub/elf.h>
+#include <grub/efi/pe32.h>
+#include <grub/misc.h>
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+
+/* Please don't internationalise this file. It's pointless.  */
+
+/*
+ *  Section layout
+ *
+ *    null
+ *    .text
+ *    .rdata
+ *    .data
+ *    .bss
+ *    .modname
+ *    .moddeps
+ *    .symtab
+ *    .strtab
+ *    relocation sections
+ */
+
+#if GRUB_TARGET_WORDSIZE == 64
+typedef Elf64_Rela elf_reloc_t;
+#define GRUB_PE32_MACHINE GRUB_PE32_MACHINE_X86_64
+#else
+typedef Elf32_Rel elf_reloc_t;
+#define GRUB_PE32_MACHINE GRUB_PE32_MACHINE_I386
+#endif
+
+#define STRTAB_BLOCK	256
+
+static char *strtab;
+static int strtab_max, strtab_len;
+
+static Elf_Ehdr ehdr;
+static Elf_Shdr *shdr;
+static int num_sections, first_reloc_section, reloc_sections_end, symtab_section, strtab_section;
+static grub_uint32_t offset, image_base;
+
+static int
+insert_string (const char *name)
+{
+  int len, result;
+
+  if (*name == '_')
+    name++;
+
+  len = strlen (name);
+  if (strtab_len + len >= strtab_max)
+    {
+      strtab_max += STRTAB_BLOCK;
+      strtab = xrealloc (strtab, strtab_max);
+    }
+
+  strcpy (strtab + strtab_len, name);
+  result = strtab_len;
+  strtab_len += len + 1;
+
+  return result;
+}
+
+static int *
+write_section_data (FILE* fp, const char *name, char *image,
+                    struct grub_pe32_coff_header *pe_chdr,
+                    struct grub_pe32_section_table *pe_shdr)
+{
+  int *section_map;
+  int i;
+  grub_uint32_t last_category = 0;
+  grub_uint32_t idx, idx_reloc;
+  char *pe_strtab = (image + pe_chdr->symtab_offset
+		     + pe_chdr->num_symbols * sizeof (struct grub_pe32_symbol));
+
+  section_map = xcalloc (2 * pe_chdr->num_sections + 5, sizeof (int));
+  section_map[0] = 0;
+  shdr = xcalloc (2 * pe_chdr->num_sections + 5, sizeof (shdr[0]));
+  idx = 1;
+  idx_reloc = pe_chdr->num_sections + 1;
+
+  for (i = 0; i < pe_chdr->num_sections; i++, pe_shdr++)
+    {
+      grub_uint32_t category;
+      const char *shname = pe_shdr->name;
+      grub_size_t secsize;
+
+      if (shname[0] == '/' && grub_isdigit (shname[1]))
+      {
+        char t[sizeof (pe_shdr->name) + 1];
+        memcpy (t, shname, sizeof (pe_shdr->name));
+        t[sizeof (pe_shdr->name)] = 0;
+        shname = pe_strtab + atoi (t + 1);
+      }
+
+      secsize = pe_shdr->raw_data_size;
+
+      shdr[idx].sh_type = SHT_PROGBITS;
+
+      if (! strcmp (shname, ".text"))
+        {
+          category = 0;
+          shdr[idx].sh_flags = SHF_ALLOC | SHF_EXECINSTR;
+        }
+      else if (! strncmp (shname, ".rdata", 6))
+        {
+          category = 1;
+          shdr[idx].sh_flags = SHF_ALLOC;
+        }
+      else if (! strcmp (shname, ".data"))
+        {
+          category = 2;
+          shdr[idx].sh_flags = SHF_ALLOC | SHF_WRITE;
+        }
+      else if (! strcmp (shname, ".bss"))
+        {
+          category = 3;
+	  shdr[idx].sh_type = SHT_NOBITS;
+          shdr[idx].sh_flags = SHF_ALLOC | SHF_WRITE;
+	  if (secsize < pe_shdr->virtual_size)
+	    secsize = pe_shdr->virtual_size;
+        }
+      else if (strcmp (shname, ".modname") == 0 || strcmp (shname, ".moddeps") == 0
+	       || strcmp (shname, ".module_license") == 0)
+        category = 4;
+      else
+        {
+          section_map[i + 1] = -1;
+          continue;
+        }
+
+      if (category < last_category)
+	grub_util_error ("out of order sections");
+
+      section_map[i + 1] = idx;
+
+      if (pe_shdr->virtual_size
+	  && pe_shdr->virtual_size < secsize)
+	secsize = pe_shdr->virtual_size;
+
+      shdr[idx].sh_size = secsize;
+      shdr[idx].sh_addralign = 1 << (((pe_shdr->characteristics >>
+                                       GRUB_PE32_SCN_ALIGN_SHIFT) &
+                                      GRUB_PE32_SCN_ALIGN_MASK) - 1);
+      shdr[idx].sh_addr = pe_shdr->virtual_address + image_base;
+
+      if (shdr[idx].sh_type != SHT_NOBITS)
+        {
+          shdr[idx].sh_offset = offset;
+          grub_util_write_image_at (image + pe_shdr->raw_data_offset,
+                                    pe_shdr->raw_data_size, offset, fp,
+				    shname);
+
+          offset += secsize;
+        }
+
+      if (pe_shdr->relocations_offset)
+        {
+          char relname[5 + strlen (shname)];
+
+          sprintf (relname, ".rel%s", shname);
+
+          shdr[idx_reloc].sh_name = insert_string (relname);
+          shdr[idx_reloc].sh_link = i;
+          shdr[idx_reloc].sh_info = idx;
+
+          shdr[idx].sh_name = shdr[idx_reloc].sh_name + 4;
+
+          idx_reloc++;
+        }
+      else
+        shdr[idx].sh_name = insert_string (shname);
+      idx++;
+    }
+
+  idx_reloc -= pe_chdr->num_sections + 1;
+  num_sections = idx + idx_reloc + 2;
+  first_reloc_section = idx;
+  reloc_sections_end = idx + idx_reloc;
+  memmove (shdr + idx, shdr + pe_chdr->num_sections + 1,
+	   idx_reloc * sizeof (shdr[0]));
+  memset (shdr + idx + idx_reloc, 0, 3 * sizeof (shdr[0]));
+  memset (shdr, 0, sizeof (shdr[0]));
+
+  symtab_section = idx + idx_reloc;
+  strtab_section = idx + idx_reloc + 1;
+
+  return section_map;
+}
+
+static void
+write_reloc_section (FILE* fp, const char *name, char *image,
+                     struct grub_pe32_coff_header *pe_chdr,
+                     struct grub_pe32_section_table  *pe_shdr,
+                     Elf_Sym *symtab,
+                     int *symtab_map)
+{
+  int i;
+
+  for (i = first_reloc_section; i < reloc_sections_end; i++)
+    {
+      struct grub_pe32_section_table *pe_sec;
+      struct grub_pe32_reloc *pe_rel;
+      elf_reloc_t *rel;
+      int num_rels, j, modified;
+
+      pe_sec = pe_shdr + shdr[i].sh_link;
+      pe_rel = (struct grub_pe32_reloc *) (image + pe_sec->relocations_offset);
+      rel = (elf_reloc_t *) xcalloc (pe_sec->num_relocations, sizeof (elf_reloc_t));
+      num_rels = 0;
+      modified = 0;
+
+      for (j = 0; j < pe_sec->num_relocations; j++, pe_rel++)
+        {
+          int type;
+          grub_uint32_t ofs, *addr;
+
+          if ((pe_rel->symtab_index >= pe_chdr->num_symbols) ||
+              (symtab_map[pe_rel->symtab_index] == -1))
+            grub_util_error ("invalid symbol");
+
+          ofs = pe_rel->offset - pe_sec->virtual_address;
+          addr = (grub_uint32_t *)(image + pe_sec->raw_data_offset + ofs);
+
+          switch (pe_rel->type)
+	    {
+#if GRUB_TARGET_WORDSIZE == 64
+	    case 1:
+	      type = R_X86_64_64;
+	      rel[num_rels].r_addend = *(grub_int64_t *)addr;
+	      *(grub_int64_t *)addr = 0;
+	      modified = 1;
+	      break;
+	    case 4:
+	      type = R_X86_64_PC32;
+	      rel[num_rels].r_addend = *(grub_int32_t *)addr;
+	      *addr = 0;
+	      modified = 1;
+	      break;
+	    case 14:
+	      type = R_X86_64_PC64;
+	      rel[num_rels].r_addend = *(grub_uint64_t *)addr - 8;
+	      *(grub_uint64_t *)addr = 0;
+	      modified = 1;
+	      break;
+#else
+	    case GRUB_PE32_REL_I386_DIR32:
+	      type = R_386_32;
+	      break;
+	    case GRUB_PE32_REL_I386_REL32:
+	      type = R_386_PC32;
+	      break;
+#endif
+	    default:
+	      grub_util_error ("unknown pe relocation type %d", pe_rel->type);
+	    }
+
+          if (type ==
+#if GRUB_TARGET_WORDSIZE == 64
+	      R_386_PC32
+#else
+	      R_X86_64_PC32
+#endif
+
+	      )
+            {
+              unsigned char code;
+
+              code = image[pe_sec->raw_data_offset + ofs - 1];
+
+#if GRUB_TARGET_WORDSIZE == 32
+              if (((code != 0xe8) && (code != 0xe9)) || (*addr))
+                grub_util_error ("invalid relocation (%x %x)", code, *addr);
+#endif
+
+              if (symtab[symtab_map[pe_rel->symtab_index]].st_shndx
+		  && symtab[symtab_map[pe_rel->symtab_index]].st_shndx
+		  == shdr[i].sh_info)
+                {
+		  modified = 1;
+                  *addr += (symtab[symtab_map[pe_rel->symtab_index]].st_value
+			    - ofs - 4);
+
+                  continue;
+                }
+              else
+		{
+#if GRUB_TARGET_WORDSIZE == 64
+		  rel[num_rels].r_addend -= 4;
+#else
+		  modified = 1;
+		  *addr = -4;
+#endif
+		}
+            }
+
+          rel[num_rels].r_offset = ofs;
+          rel[num_rels].r_info = ELF_R_INFO (symtab_map[pe_rel->symtab_index],
+					     type);
+          num_rels++;
+        }
+
+      if (modified)
+        grub_util_write_image_at (image + pe_sec->raw_data_offset,
+                                  shdr[shdr[i].sh_info].sh_size,
+                                  shdr[shdr[i].sh_info].sh_offset,
+                                  fp, name);
+
+#if GRUB_TARGET_WORDSIZE == 64
+      shdr[i].sh_type = SHT_RELA;
+#else
+      shdr[i].sh_type = SHT_REL;
+#endif
+      shdr[i].sh_offset = offset;
+      shdr[i].sh_link = symtab_section;
+      shdr[i].sh_addralign = 4;
+      shdr[i].sh_entsize = sizeof (elf_reloc_t);
+      shdr[i].sh_size = num_rels * sizeof (elf_reloc_t);
+
+      grub_util_write_image_at (rel, shdr[i].sh_size, offset, fp, name);
+      offset += shdr[i].sh_size;
+      free (rel);
+    }
+}
+
+static void
+write_symbol_table (FILE* fp, const char *name, char *image,
+                    struct grub_pe32_coff_header *pe_chdr,
+                    struct grub_pe32_section_table *pe_shdr,
+                    int *section_map)
+{
+  struct grub_pe32_symbol *pe_symtab;
+  char *pe_strtab;
+  Elf_Sym *symtab;
+  int *symtab_map, num_syms;
+  int i;
+
+  pe_symtab = (struct grub_pe32_symbol *) (image + pe_chdr->symtab_offset);
+  pe_strtab = (char *) (pe_symtab + pe_chdr->num_symbols);
+
+  symtab = (Elf_Sym *) xcalloc (pe_chdr->num_symbols + 1, sizeof (Elf_Sym));
+  num_syms = 1;
+
+  symtab_map = (int *) xcalloc (pe_chdr->num_symbols, sizeof (int));
+
+  for (i = 0; i < (int) pe_chdr->num_symbols;
+       i += pe_symtab->num_aux + 1, pe_symtab += pe_symtab->num_aux + 1)
+    {
+      int bind, type;
+
+      symtab_map[i] = -1;
+      if ((pe_symtab->section > pe_chdr->num_sections) ||
+          (section_map[pe_symtab->section] == -1))
+        continue;
+
+      if (! pe_symtab->section)
+        type = STT_NOTYPE;
+      else if (pe_symtab->type == GRUB_PE32_DT_FUNCTION)
+        type = STT_FUNC;
+      else
+        type = STT_OBJECT;
+
+      if (pe_symtab->storage_class == GRUB_PE32_SYM_CLASS_EXTERNAL)
+        bind = STB_GLOBAL;
+      else
+        bind = STB_LOCAL;
+
+      if ((pe_symtab->type != GRUB_PE32_DT_FUNCTION) && (pe_symtab->num_aux))
+        {
+          if (! pe_symtab->value)
+            type = STT_SECTION;
+
+          symtab[num_syms].st_name = shdr[section_map[pe_symtab->section]].sh_name;
+        }
+      else
+        {
+	  char short_name[9];
+          char *symname;
+
+	  if (pe_symtab->long_name[0])
+	    {
+	      strncpy (short_name, pe_symtab->short_name, 8);
+	      short_name[8] = 0;
+	      symname = short_name;
+	    }
+	  else
+	    symname = pe_strtab + pe_symtab->long_name[1];
+
+          if ((strcmp (symname, "_grub_mod_init")) &&
+              (strcmp (symname, "_grub_mod_fini")) &&
+	      (strcmp (symname, "grub_mod_init")) &&
+              (strcmp (symname, "grub_mod_fini")) &&
+              (bind == STB_LOCAL))
+              continue;
+
+          symtab[num_syms].st_name = insert_string (symname);
+        }
+
+      symtab[num_syms].st_shndx = section_map[pe_symtab->section];
+      symtab[num_syms].st_value = pe_symtab->value;
+      symtab[num_syms].st_info = ELF_ST_INFO (bind, type);
+
+      symtab_map[i] = num_syms;
+      num_syms++;
+    }
+
+  write_reloc_section (fp, name, image, pe_chdr, pe_shdr,
+		       symtab, symtab_map);
+
+  shdr[symtab_section].sh_name = insert_string (".symtab");
+  shdr[symtab_section].sh_type = SHT_SYMTAB;
+  shdr[symtab_section].sh_offset = offset;
+  shdr[symtab_section].sh_size = num_syms * sizeof (Elf_Sym);
+  shdr[symtab_section].sh_entsize = sizeof (Elf_Sym);
+  shdr[symtab_section].sh_link = strtab_section;
+  shdr[symtab_section].sh_addralign = 4;
+
+  grub_util_write_image_at (symtab, shdr[symtab_section].sh_size,
+                            offset, fp, name);
+  offset += shdr[symtab_section].sh_size;
+
+  free (symtab);
+  free (symtab_map);
+}
+
+static void
+write_string_table (FILE *fp, const char *name)
+{
+  shdr[strtab_section].sh_name = insert_string (".strtab");
+  shdr[strtab_section].sh_type = SHT_STRTAB;
+  shdr[strtab_section].sh_offset = offset;
+  shdr[strtab_section].sh_size = strtab_len;
+  shdr[strtab_section].sh_addralign = 1;
+  grub_util_write_image_at (strtab, strtab_len, offset, fp,
+			    name);
+  offset += strtab_len;
+
+  free (strtab);
+}
+
+static void
+write_section_header (FILE *fp, const char *name)
+{
+  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_VERSION] = EV_CURRENT;
+  ehdr.e_version = EV_CURRENT;
+  ehdr.e_type = ET_REL;
+
+#if GRUB_TARGET_WORDSIZE == 64
+  ehdr.e_ident[EI_CLASS] = ELFCLASS64;
+  ehdr.e_ident[EI_DATA] = ELFDATA2LSB;
+  ehdr.e_machine = EM_X86_64;
+#else
+  ehdr.e_ident[EI_CLASS] = ELFCLASS32;
+  ehdr.e_ident[EI_DATA] = ELFDATA2LSB;
+  ehdr.e_machine = EM_386;
+#endif
+  ehdr.e_ehsize = sizeof (ehdr);
+  ehdr.e_shentsize = sizeof (Elf_Shdr);
+  ehdr.e_shstrndx = strtab_section;
+
+  ehdr.e_shoff = offset;
+  ehdr.e_shnum = num_sections;
+  grub_util_write_image_at (shdr, sizeof (Elf_Shdr) * num_sections,
+                            offset, fp, name);
+
+  grub_util_write_image_at (&ehdr, sizeof (Elf_Ehdr), 0, fp, name);
+}
+
+static void
+convert_pe (FILE* fp, const char *name, char *image)
+{
+  struct grub_pe32_coff_header *pe_chdr;
+  struct grub_pe32_section_table *pe_shdr;
+  int *section_map;
+
+  if (image[0] == 'M' && image[1] == 'Z')
+    pe_chdr = (struct grub_pe32_coff_header *) (image + (grub_le_to_cpu32 (((grub_uint32_t *)image)[0xf]) + 4));
+  else
+    pe_chdr = (struct grub_pe32_coff_header *) image;
+  if (grub_le_to_cpu16 (pe_chdr->machine) != GRUB_PE32_MACHINE)
+    grub_util_error ("invalid coff image (%x != %x)",
+		     grub_le_to_cpu16 (pe_chdr->machine), GRUB_PE32_MACHINE);
+
+  strtab = xmalloc (STRTAB_BLOCK);
+  strtab_max = STRTAB_BLOCK;
+  strtab[0] = 0;
+  strtab_len = 1;
+
+  offset = sizeof (ehdr);
+  if (pe_chdr->optional_header_size)
+    {
+#if GRUB_TARGET_WORDSIZE == 64
+      struct grub_pe64_optional_header *o;
+#else
+      struct grub_pe32_optional_header *o;
+#endif
+      o = (void *) (pe_chdr + 1);
+      image_base = o->image_base;
+    }
+  pe_shdr = (struct grub_pe32_section_table *) ((char *) (pe_chdr + 1) + pe_chdr->optional_header_size);
+
+  section_map = write_section_data (fp, name, image, pe_chdr, pe_shdr);
+
+  write_symbol_table (fp, name, image, pe_chdr, pe_shdr, section_map);
+  free (section_map);
+
+  write_string_table (fp, name);
+
+  write_section_header (fp, name);
+}
+
+int
+main (int argc, char *argv[])
+{
+  char *image;
+  FILE* fp;
+  char *in, *out;
+
+  /* Obtain PATH.  */
+  if (1 >= argc)
+    {
+      fprintf (stderr, "Filename not specified.\n");
+      return 1;
+    }
+
+  in = argv[1];
+  if (argc > 2)
+    out = argv[2];
+  else
+    out = in;
+  image = grub_util_read_image (in);
+
+  fp = grub_util_fopen (out, "wb");
+  if (! fp)
+    grub_util_error ("cannot open %s", out);
+
+  convert_pe (fp, out, image);
+
+  fclose (fp);
+
+  return 0;
+}