提交: 0860f6373e0df2b8dcece04dd874f95c3f09e3df - binutils_os216 (git)

GNU Binutils with patches for OS216

Commit MetaInfo

• 修訂: 0860f6373e0df2b8dcece04dd874f95c3f09e3df (tree)
• 時間: 2017-11-27 02:38:09
• 作者: H.J. Lu <hjl.tools@gmai...>
• Commiter: H.J. Lu

Log Message

Check corrupted symbol table

bfd/

PR binutils/12639
* elfcode.h (elf_slurp_symbol_table): Check corrupted global
symbols.

binutils/

PR binutils/12639
* readelf.c (process_symbol_table): Detect corrupted symbol
table.

Change Summary

• modified: bfd/elfcode.h
• modified: binutils/readelf.c

差異

--- a/bfd/elfcode.h
+++ b/bfd/elfcode.h
@@ -1173,6 +1173,9 @@ elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic)
     sym = symbase = NULL;
   else
     {
+      /* Start of global symbols */
+      Elf_Internal_Sym *start_global;
+
       isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0,
 				      NULL, NULL, NULL);
       if (isymbuf == NULL)
@@ -1218,6 +1221,9 @@ elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic)
       if (xver != NULL)
 	++xver;
       isymend = isymbuf + symcount;
+      start_global = isymbuf;
+      if (!elf_bad_symtab (abfd))
+	start_global += hdr->sh_info;
       for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++)
 	{
 	  memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym));
@@ -1275,6 +1281,12 @@ elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic)
 	  if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
 	    sym->symbol.value -= sym->symbol.section->vma;
 
+	  if (isym < start_global
+	      && ELF_ST_BIND (isym->st_info) != STB_LOCAL)
+	    (*_bfd_error_handler)
+	      (_("%s: corrupted global symbol `%s' treated as local"),
+	       abfd->filename, sym->symbol.name);
+
 	  switch (ELF_ST_BIND (isym->st_info))
 	    {
 	    case STB_LOCAL:

--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -11571,6 +11571,12 @@ process_symbol_table (Filedata * filedata)
 	   && filedata->section_headers != NULL)
     {
       unsigned int i;
+      /* Irix 5 and 6 are broken.  Object file symbol tables are not
+	 always sorted correctly such that local symbols precede global
+	 symbols, and the sh_info field in the symbol table is not
+	 always right.  */
+      bfd_boolean check_corrupt_symtab
+	= filedata->file_header.e_ident[EI_OSABI] != ELFOSABI_IRIX;
 
       for (i = 0, section = filedata->section_headers;
 	   i < filedata->file_header.e_shnum;
@@ -11640,7 +11646,12 @@ process_symbol_table (Filedata * filedata)
 	      putchar (' ');
 	      print_vma (psym->st_size, DEC_5);
 	      printf (" %-7s", get_symbol_type (filedata, ELF_ST_TYPE (psym->st_info)));
-	      printf (" %-6s", get_symbol_binding (filedata, ELF_ST_BIND (psym->st_info)));
+	      if (check_corrupt_symtab
+		  && si < section->sh_info
+		  && ELF_ST_BIND (psym->st_info) != STB_LOCAL)
+		printf (" %-6s", "<corrupt>");
+	      else
+	        printf (" %-6s", get_symbol_binding (filedata, ELF_ST_BIND (psym->st_info)));
 	      if (filedata->file_header.e_ident[EI_OSABI] == ELFOSABI_SOLARIS)
 		printf (" %-7s",  get_solaris_symbol_visibility (psym->st_other));
 	      else