Initial revision

1 files changed, 226 insertions, 0 deletions

diff --git a/bfd/elfcore.h b/bfd/elfcore.h
new file mode 100644
index 00000000000..e4454aac9d0
--- /dev/null
+++ b/bfd/elfcore.h
@@ -0,0 +1,226 @@
+/* ELF core file support for BFD.
+   Copyright (C) 1995, 1996, 1997, 1998 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
+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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+
+char*
+elf_core_file_failing_command (abfd)
+     bfd *abfd;
+{
+  return elf_tdata (abfd)->core_command;
+}
+
+int
+elf_core_file_failing_signal (abfd)
+     bfd *abfd;
+{
+  return elf_tdata (abfd)->core_signal;
+}
+
+
+boolean
+elf_core_file_matches_executable_p (core_bfd, exec_bfd)
+     bfd *core_bfd;
+     bfd *exec_bfd;
+{
+  char* corename;
+
+  /* xvecs must match if both are ELF files for the same target. */
+
+  if (core_bfd->xvec != exec_bfd->xvec)
+    {
+      bfd_set_error (bfd_error_system_call);
+      return false;
+    }
+
+  /* See if the name in the corefile matches the executable name. */
+
+  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 (strcmp(execname, corename) != 0)
+	return false;
+    }
+
+  return true;
+}
+
+
+/*  Core files are simply standard ELF formatted files that partition
+    the file using the execution view of the file (program header table)
+    rather than the linking view.  In fact, there is no section header
+    table in a core file.
+
+    The process status information (including the contents of the general
+    register set) and the floating point register set are stored in a
+    segment of type PT_NOTE.  We handcraft a couple of extra bfd sections
+    that allow standard bfd access to the general registers (.reg) and the
+    floating point registers (.reg2).
+
+ */
+
+const bfd_target *
+elf_core_file_p (abfd)
+     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;
+  struct elf_backend_data *ebd;
+
+  /* Read in the ELF header in external format.  */
+  if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
+    {
+      if (bfd_get_error () != bfd_error_system_call)
+	bfd_set_error (bfd_error_wrong_format);
+      return NULL;
+    }
+
+  /* Check the magic number. */
+  if (elf_file_p (&x_ehdr) == false)
+    {
+    wrong:
+      bfd_set_error (bfd_error_wrong_format);
+      return NULL;
+    }
+
+  /* FIXME: Check EI_VERSION here ! */
+
+  /* Check the address size ("class"). */
+  if (x_ehdr.e_ident[EI_CLASS] != ELFCLASS)
+    goto wrong;
+
+  /* Check the byteorder. */
+  switch (x_ehdr.e_ident[EI_DATA])
+    {
+    case ELFDATA2MSB:		/* Big-endian */
+      if (! bfd_big_endian (abfd))
+	goto wrong;
+      break;
+    case ELFDATA2LSB:		/* Little-endian */
+      if (! bfd_little_endian (abfd))
+	goto wrong;
+      break;
+    default:
+      goto wrong;
+    }
+
+  /* Give abfd an elf_obj_tdata. */
+  elf_tdata (abfd) =
+    (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
+  if (elf_tdata (abfd) == NULL)
+    return NULL;
+
+  /* FIXME: from here on down, "goto wrong" will leak memory.  */
+
+  /* Swap in the rest of the header, now that we have the byte order. */
+  i_ehdrp = elf_elfheader (abfd);
+  elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
+
+#if DEBUG & 1
+  elf_debug_file (i_ehdrp);
+#endif
+
+  ebd = get_elf_backend_data (abfd);
+
+  /* Check that the ELF e_machine field matches what this particular
+     BFD format expects.  */
+
+  if (ebd->elf_machine_code != i_ehdrp->e_machine
+      && (ebd->elf_machine_alt1 == 0
+	  || i_ehdrp->e_machine != ebd->elf_machine_alt1)
+      && (ebd->elf_machine_alt2 == 0
+	  || i_ehdrp->e_machine != ebd->elf_machine_alt2))
+    {
+      const bfd_target * const *target_ptr;
+
+      if (ebd->elf_machine_code != EM_NONE)
+	goto wrong;
+
+      /* This is the generic ELF target.  Let it match any ELF target
+	 for which we do not have a specific backend.  */
+
+      for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++)
+	{
+	  struct elf_backend_data *back;
+
+	  if ((*target_ptr)->flavour != bfd_target_elf_flavour)
+	    continue;
+	  back = (struct elf_backend_data *) (*target_ptr)->backend_data;
+	  if (back->elf_machine_code == i_ehdrp->e_machine)
+	    {
+	      /* target_ptr is an ELF backend which matches this
+		 object file, so reject the generic ELF target.  */
+	      goto wrong;
+	    }
+	}
+    }
+
+  /* If there is no program header, or the type is not a core file, then
+     we are hosed. */
+  if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE)
+    goto wrong;
+
+  /* Does BFD's idea of the phdr size match the size
+     recorded in the file? */
+  if (i_ehdrp->e_phentsize != sizeof (Elf_External_Phdr))
+    goto wrong;
+
+  /* Allocate space for the program headers. */
+  i_phdrp = (Elf_Internal_Phdr *)
+    bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum);
+  if (!i_phdrp)
+    return NULL;
+
+  elf_tdata (abfd)->phdr = i_phdrp;
+
+  /* Read and convert to internal form. */
+  for (phindex = 0; phindex < i_ehdrp->e_phnum; ++phindex)
+    {
+      Elf_External_Phdr x_phdr;
+      if (bfd_read ((PTR) &x_phdr, sizeof (x_phdr), 1, abfd)
+	  != sizeof (x_phdr))
+	return NULL;
+
+      elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex);
+    }
+
+  /* Process each program header. */
+  for (phindex = 0; phindex < i_ehdrp->e_phnum; ++phindex)
+    {
+      if (!_bfd_elfcore_section_from_phdr (abfd, i_phdrp + phindex, phindex))
+	return NULL;
+    }
+
+  /* Set the machine architecture. */
+  if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0))
+    {
+      /* It's OK if this fails for the generic target.  */
+      if (ebd->elf_machine_code != EM_NONE)
+	return NULL;
+    }
+
+  /* Save the entry point from the ELF header. */
+  bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+
+  return abfd->xvec;
+}