* elf-bfd.h (struct core_elf_obj_tdata): New.

[deliverable/binutils-gdb.git] / bfd / elfcore.h

diff --git a/bfd/elfcore.h b/bfd/elfcore.h
index cd218066dc494172be11ac319b1d9a9b2e553b4a..429c09c758e5771fbcfb5362d96a29cf5cf09a20 100644 (file)
--- a/bfd/elfcore.h
+++ b/bfd/elfcore.h
@@ -1,12 +1,12 @@
 /* ELF core file support for BFD.
 /* ELF core file support for BFD.

-   Copyright 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003
-   Free Software Foundation, Inc.
+   Copyright 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003, 2005, 2007,
+   2008, 2010 Free Software Foundation, Inc.

 
    This file is part of BFD, the Binary File Descriptor library.
 
    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
 
    This file is part of BFD, the Binary File Descriptor library.
 
    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
+   the Free Software Foundation; either version 3 of the License, or

    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,


@@ -16,26 +16,29 @@
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
 
    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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */

 
 char*
 
 char*

-elf_core_file_failing_command (abfd)
-     bfd *abfd;
+elf_core_file_failing_command (bfd *abfd)

 {
 {

-  return elf_tdata (abfd)->core_command;
+  return elf_tdata (abfd)->core->command;

 }
 
 int
 }
 
 int

-elf_core_file_failing_signal (abfd)
-     bfd *abfd;
+elf_core_file_failing_signal (bfd *abfd)

 {
 {

-  return elf_tdata (abfd)->core_signal;
+  return elf_tdata (abfd)->core->signal;
+}
+
+int
+elf_core_file_pid (bfd *abfd)
+{
+  return elf_tdata (abfd)->core->pid;

 }
 
 bfd_boolean
 }
 
 bfd_boolean

-elf_core_file_matches_executable_p (core_bfd, exec_bfd)
-     bfd *core_bfd;
-     bfd *exec_bfd;
+elf_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd)

 {
   char* corename;
 
 {
   char* corename;
 


@@ -48,14 +51,14 @@ elf_core_file_matches_executable_p (core_bfd, exec_bfd)
     }
 
   /* See if the name in the corefile matches the executable name.  */
     }
 
   /* See if the name in the corefile matches the executable name.  */

-  corename = elf_tdata (core_bfd)->core_program;
+  corename = elf_tdata (core_bfd)->core->program;

   if (corename != NULL)
     {
       const char* execname = strrchr (exec_bfd->filename, '/');
 
       execname = execname ? execname + 1 : exec_bfd->filename;
 
   if (corename != NULL)
     {
       const char* execname = strrchr (exec_bfd->filename, '/');
 
       execname = execname ? execname + 1 : exec_bfd->filename;
 

-      if (strcmp(execname, corename) != 0)
+      if (strcmp (execname, corename) != 0)

        return FALSE;
     }
 
        return FALSE;
     }
 


@@ -74,22 +77,17 @@ elf_core_file_matches_executable_p (core_bfd, exec_bfd)
     floating point registers (.reg2).  */
 
 const bfd_target *
     floating point registers (.reg2).  */
 
 const bfd_target *

-elf_core_file_p (abfd)
-     bfd *abfd;
+elf_core_file_p (bfd *abfd)

 {
   Elf_External_Ehdr x_ehdr;    /* Elf file header, external form.  */
   Elf_Internal_Ehdr *i_ehdrp;  /* Elf file header, internal form.  */
   Elf_Internal_Phdr *i_phdrp;  /* Elf program header, internal form.  */
   unsigned int phindex;
 {
   Elf_External_Ehdr x_ehdr;    /* Elf file header, external form.  */
   Elf_Internal_Ehdr *i_ehdrp;  /* Elf file header, internal form.  */
   Elf_Internal_Phdr *i_phdrp;  /* Elf program header, internal form.  */
   unsigned int phindex;

-  struct elf_backend_data *ebd;
-  struct bfd_preserve preserve;
+  const struct elf_backend_data *ebd;

   bfd_size_type amt;
 
   bfd_size_type amt;
 

-  preserve.marker = NULL;
-

   /* Read in the ELF header in external format.  */
   /* Read in the ELF header in external format.  */

-  if (bfd_bread ((PTR) &x_ehdr, (bfd_size_type) sizeof (x_ehdr), abfd)
-      != sizeof (x_ehdr))
+  if (bfd_bread (&x_ehdr, sizeof (x_ehdr), abfd) != sizeof (x_ehdr))

     {
       if (bfd_get_error () != bfd_error_system_call)
        goto wrong;
     {
       if (bfd_get_error () != bfd_error_system_call)
        goto wrong;


@@ -122,13 +120,9 @@ elf_core_file_p (abfd)
       goto wrong;
     }
 
       goto wrong;
     }
 

-  if (!bfd_preserve_save (abfd, &preserve))
-    goto fail;
-

   /* Give abfd an elf_obj_tdata.  */
   if (! (*abfd->xvec->_bfd_set_format[bfd_core]) (abfd))
     goto fail;
   /* Give abfd an elf_obj_tdata.  */
   if (! (*abfd->xvec->_bfd_set_format[bfd_core]) (abfd))
     goto fail;

-  preserve.marker = elf_tdata (abfd);

 
   /* Swap in the rest of the header, now that we have the byte order.  */
   i_ehdrp = elf_elfheader (abfd);
 
   /* Swap in the rest of the header, now that we have the byte order.  */
   i_ehdrp = elf_elfheader (abfd);


@@ -159,11 +153,13 @@ elf_core_file_p (abfd)
 
       for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++)
        {
 
       for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++)
        {

-         struct elf_backend_data *back;
+         const struct elf_backend_data *back;

 
          if ((*target_ptr)->flavour != bfd_target_elf_flavour)
            continue;
 
          if ((*target_ptr)->flavour != bfd_target_elf_flavour)
            continue;

-         back = (struct elf_backend_data *) (*target_ptr)->backend_data;
+         back = xvec_get_elf_backend_data (*target_ptr);
+         if (back->s->arch_size != ARCH_SIZE)
+           continue;

          if (back->elf_machine_code == i_ehdrp->e_machine
              || (back->elf_machine_alt1 != 0
                  && i_ehdrp->e_machine == back->elf_machine_alt1)
          if (back->elf_machine_code == i_ehdrp->e_machine
              || (back->elf_machine_alt1 != 0
                  && i_ehdrp->e_machine == back->elf_machine_alt1)


@@ -187,6 +183,61 @@ elf_core_file_p (abfd)
   if (i_ehdrp->e_phentsize != sizeof (Elf_External_Phdr))
     goto wrong;
 
   if (i_ehdrp->e_phentsize != sizeof (Elf_External_Phdr))
     goto wrong;
 

+  /* If the program header count is PN_XNUM(0xffff), the actual
+     count is in the first section header.  */
+  if (i_ehdrp->e_shoff != 0 && i_ehdrp->e_phnum == PN_XNUM)
+    {
+      Elf_External_Shdr x_shdr;
+      Elf_Internal_Shdr i_shdr;
+      bfd_signed_vma where = i_ehdrp->e_shoff;
+
+      if (where != (file_ptr) where)
+       goto wrong;
+
+      /* Seek to the section header table in the file.  */
+      if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0)
+       goto fail;
+
+      /* Read the first section header at index 0, and convert to internal
+        form.  */
+      if (bfd_bread (&x_shdr, sizeof (x_shdr), abfd) != sizeof (x_shdr))
+       goto fail;
+      elf_swap_shdr_in (abfd, &x_shdr, &i_shdr);
+
+      if (i_shdr.sh_info != 0)
+       {
+         i_ehdrp->e_phnum = i_shdr.sh_info;
+         if (i_ehdrp->e_phnum != i_shdr.sh_info)
+           goto wrong;
+       }
+    }
+
+  /* Sanity check that we can read all of the program headers.
+     It ought to be good enough to just read the last one.  */
+  if (i_ehdrp->e_phnum > 1)
+    {
+      Elf_External_Phdr x_phdr;
+      Elf_Internal_Phdr i_phdr;
+      bfd_signed_vma where;
+
+      /* Check that we don't have a totally silly number of
+        program headers.  */
+      if (i_ehdrp->e_phnum > (unsigned int) -1 / sizeof (x_phdr)
+         || i_ehdrp->e_phnum > (unsigned int) -1 / sizeof (i_phdr))
+       goto wrong;
+
+      where = i_ehdrp->e_phoff + (i_ehdrp->e_phnum - 1) * sizeof (x_phdr);
+      if (where != (file_ptr) where)
+       goto wrong;
+      if ((bfd_size_type) where <= i_ehdrp->e_phoff)
+       goto wrong;
+
+      if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0)
+       goto fail;
+      if (bfd_bread (&x_phdr, sizeof (x_phdr), abfd) != sizeof (x_phdr))
+       goto fail;
+    }
+

   /* Move to the start of the program headers.  */
   if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0)
     goto wrong;
   /* Move to the start of the program headers.  */
   if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0)
     goto wrong;


@@ -204,8 +255,7 @@ elf_core_file_p (abfd)
     {
       Elf_External_Phdr x_phdr;
 
     {
       Elf_External_Phdr x_phdr;
 

-      if (bfd_bread ((PTR) &x_phdr, (bfd_size_type) sizeof (x_phdr), abfd)
-         != sizeof (x_phdr))
+      if (bfd_bread (&x_phdr, sizeof (x_phdr), abfd) != sizeof (x_phdr))

        goto fail;
 
       elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex);
        goto fail;
 
       elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex);


@@ -214,44 +264,57 @@ elf_core_file_p (abfd)
   /* Set the machine architecture.  Do this before processing the
      program headers since we need to know the architecture type
      when processing the notes of some systems' core files.  */
   /* Set the machine architecture.  Do this before processing the
      program headers since we need to know the architecture type
      when processing the notes of some systems' core files.  */

-  if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0))
-    {
+  if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)

       /* It's OK if this fails for the generic target.  */
       /* It's OK if this fails for the generic target.  */

-      if (ebd->elf_machine_code != EM_NONE)
-       goto fail;
-    }
+      && ebd->elf_machine_code != EM_NONE)
+    goto fail;
+
+  /* Let the backend double check the format and override global
+     information.  We do this before processing the program headers
+     to allow the correct machine (as opposed to just the default
+     machine) to be set, making it possible for grok_prstatus and
+     grok_psinfo to rely on the mach setting.  */
+  if (ebd->elf_backend_object_p != NULL
+      && ! ebd->elf_backend_object_p (abfd))
+    goto wrong;

 
   /* Process each program header.  */
   for (phindex = 0; phindex < i_ehdrp->e_phnum; ++phindex)
     if (! bfd_section_from_phdr (abfd, i_phdrp + phindex, (int) phindex))
       goto fail;
 
 
   /* Process each program header.  */
   for (phindex = 0; phindex < i_ehdrp->e_phnum; ++phindex)
     if (! bfd_section_from_phdr (abfd, i_phdrp + phindex, (int) phindex))
       goto fail;
 

+  /* Check for core truncation.  */
+  {
+    bfd_size_type high = 0;
+    struct stat statbuf;
+    for (phindex = 0; phindex < i_ehdrp->e_phnum; ++phindex)
+      {
+       Elf_Internal_Phdr *p = i_phdrp + phindex;
+       if (p->p_filesz)
+         {
+           bfd_size_type current = p->p_offset + p->p_filesz;
+           if (high < current)
+             high = current;
+         }
+      }
+    if (bfd_stat (abfd, &statbuf) == 0)
+      {
+       if ((bfd_size_type) statbuf.st_size < high)
+         {
+           (*_bfd_error_handler)
+             (_("Warning: %B is truncated: expected core file "
+                "size >= %lu, found: %lu."),
+              abfd, (unsigned long) high, (unsigned long) statbuf.st_size);
+         }
+      }
+  }
+

   /* Save the entry point from the ELF header.  */
   bfd_get_start_address (abfd) = i_ehdrp->e_entry;
   /* Save the entry point from the ELF header.  */
   bfd_get_start_address (abfd) = i_ehdrp->e_entry;

-
-  /* Let the backend double check the format and override global
-     information.  */
-  if (ebd->elf_backend_object_p
-      && (! (*ebd->elf_backend_object_p) (abfd)))
-    goto wrong;
-
-  bfd_preserve_finish (abfd, &preserve);

   return abfd->xvec;
 
 wrong:
   return abfd->xvec;
 
 wrong:

-  /* There is way too much undoing of half-known state here.  The caller,
-     bfd_check_format_matches, really shouldn't iterate on live bfd's to
-     check match/no-match like it does.  We have to rely on that a call to
-     bfd_default_set_arch_mach with the previously known mach, undoes what
-     was done by the first bfd_default_set_arch_mach (with mach 0) here.
-     For this to work, only elf-data and the mach may be changed by the
-     target-specific elf_backend_object_p function.  Note that saving the
-     whole bfd here and restoring it would be even worse; the first thing
-     you notice is that the cached bfd file position gets out of sync.  */

   bfd_set_error (bfd_error_wrong_format);
   bfd_set_error (bfd_error_wrong_format);

-

 fail:
 fail:

-  if (preserve.marker != NULL)
-    bfd_preserve_restore (abfd, &preserve);

   return NULL;
 }
   return NULL;
 }