Initial import of GNU binutils version 2.8.1. Believe it or not,

this is heavily stripped down.

1 files changed, 550 insertions, 0 deletions

diff --git a/contrib/binutils/bfd/elfcore.h b/contrib/binutils/bfd/elfcore.h
new file mode 100644
index 0000000..77f683a
--- /dev/null
+++ b/contrib/binutils/bfd/elfcore.h
@@ -0,0 +1,550 @@
+/* ELF core file support for BFD.
+   Copyright (C) 1995, 1996, 1997 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.  */
+/* Core file support */
+
+#ifdef HAVE_SYS_PROCFS_H		/* Some core file support requires host /proc files */
+#include <signal.h>
+#include <sys/procfs.h>
+
+/* Solaris includes the field pr_who that indicates the thread number within
+   the process.  */
+
+#ifdef PIOCOPENLWP
+#define get_thread(STATUS) ((((prstatus_t *)(STATUS))->pr_who << 16) \
+			    | ((prstatus_t *)(STATUS))->pr_pid)
+#else
+#define get_thread(STATUS) (((prstatus_t *)(STATUS))->pr_pid)
+#endif
+
+static boolean bfd_prstatus PARAMS ((bfd *, char *, int, long, int));
+static boolean bfd_prpsinfo PARAMS ((bfd *, char *, int, long));
+static boolean bfd_fpregset PARAMS ((bfd *, char *, int, long, int));
+static boolean elf_corefile_note PARAMS ((bfd *, Elf_Internal_Phdr *));
+
+#else
+#define bfd_prstatus(abfd, descdata, descsz, filepos, thread) true
+#define bfd_fpregset(abfd, descdata, descsz, filepos, thread) true
+#define bfd_prpsinfo(abfd, descdata, descsz, filepos) true
+#define get_thread(STATUS) (1)
+#endif
+
+#ifdef HAVE_SYS_PROCFS_H
+
+static int did_reg;
+static int did_reg2;
+
+static boolean
+bfd_prstatus (abfd, descdata, descsz, filepos, thread)
+     bfd *abfd;
+     char *descdata;
+     int descsz;
+     long filepos;
+     int thread;
+{
+  asection *newsect;
+  prstatus_t *status = (prstatus_t *) 0;
+
+  if (descsz == sizeof (prstatus_t))
+    {
+      char secname[100];
+      char *p;
+
+      sprintf (secname, ".reg/%d", thread);
+      p = bfd_alloc (abfd, strlen (secname) + 1);
+      if (!p)
+	return false;
+      strcpy (p, secname);
+      
+      newsect = bfd_make_section (abfd, p);
+      if (newsect == NULL)
+	return false;
+      newsect->_raw_size = sizeof (status->pr_reg);
+      newsect->filepos = filepos + (long) &status->pr_reg;
+      newsect->flags = SEC_HAS_CONTENTS;
+      newsect->alignment_power = 2;
+      if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL)
+	{
+	  memcpy (core_prstatus (abfd), descdata, descsz);
+	}
+
+      if (!did_reg++)
+	{
+	  asection *regsect;
+
+	  regsect = bfd_make_section (abfd, ".reg");
+	  if (regsect == NULL)
+	    return false;
+	  regsect->_raw_size = newsect->_raw_size;
+	  regsect->filepos = newsect->filepos;
+	  regsect->flags = newsect->flags;
+	  regsect->alignment_power = newsect->alignment_power;
+	}
+    }
+  return true;
+}
+
+/* Stash a copy of the prpsinfo structure away for future use. */
+
+static boolean
+bfd_prpsinfo (abfd, descdata, descsz, filepos)
+     bfd *abfd;
+     char *descdata;
+     int descsz;
+     long filepos;
+{
+  if (descsz == sizeof (prpsinfo_t))
+    {
+      if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) == NULL)
+	return false;
+      memcpy (core_prpsinfo (abfd), descdata, descsz);
+    }
+  return true;
+}
+
+static boolean
+bfd_fpregset (abfd, descdata, descsz, filepos, thread)
+     bfd *abfd;
+     char *descdata;
+     int descsz;
+     long filepos;
+     int thread;
+{
+  asection *newsect;
+  char secname[100];
+  char *p;
+
+  sprintf (secname, ".reg2/%d", thread);
+  p = bfd_alloc (abfd, strlen (secname) + 1);
+  if (!p)
+    return false;
+  strcpy (p, secname);
+
+  newsect = bfd_make_section (abfd, p);
+  if (newsect == NULL)
+    return false;
+  newsect->_raw_size = descsz;
+  newsect->filepos = filepos;
+  newsect->flags = SEC_HAS_CONTENTS;
+  newsect->alignment_power = 2;
+
+  if (!did_reg2++)
+    {
+      asection *regsect;
+
+      regsect = bfd_make_section (abfd, ".reg2");
+      if (regsect == NULL)
+	return false;
+      regsect->_raw_size = newsect->_raw_size;
+      regsect->filepos = newsect->filepos;
+      regsect->flags = newsect->flags;
+      regsect->alignment_power = newsect->alignment_power;
+    }
+
+  return true;
+}
+
+#endif /* HAVE_SYS_PROCFS_H */
+
+/* Return a pointer to the args (including the command name) that were
+   seen by the program that generated the core dump.  Note that for
+   some reason, a spurious space is tacked onto the end of the args
+   in some (at least one anyway) implementations, so strip it off if
+   it exists. */
+
+char *
+elf_core_file_failing_command (abfd)
+     bfd *abfd;
+{
+#ifdef HAVE_SYS_PROCFS_H
+  if (core_prpsinfo (abfd))
+    {
+      prpsinfo_t *p = core_prpsinfo (abfd);
+      char *scan = p->pr_psargs;
+      while (*scan++)
+	{;
+	}
+      scan -= 2;
+      if ((scan > p->pr_psargs) && (*scan == ' '))
+	{
+	  *scan = '\000';
+	}
+      return p->pr_psargs;
+    }
+#endif
+  return NULL;
+}
+
+/* Return the number of the signal that caused the core dump.  Presumably,
+   since we have a core file, we got a signal of some kind, so don't bother
+   checking the other process status fields, just return the signal number.
+   */
+
+int
+elf_core_file_failing_signal (abfd)
+     bfd *abfd;
+{
+#ifdef HAVE_SYS_PROCFS_H
+  if (core_prstatus (abfd))
+    {
+      return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig;
+    }
+#endif
+  return -1;
+}
+
+/* Check to see if the core file could reasonably be expected to have
+   come for the current executable file.  Note that by default we return
+   true unless we find something that indicates that there might be a
+   problem.
+   */
+
+boolean
+elf_core_file_matches_executable_p (core_bfd, exec_bfd)
+     bfd *core_bfd;
+     bfd *exec_bfd;
+{
+#ifdef HAVE_SYS_PROCFS_H
+  char *corename;
+  char *execname;
+#endif
+
+  /* First, xvecs must match since both are ELF files for the same target. */
+
+  if (core_bfd->xvec != exec_bfd->xvec)
+    {
+      bfd_set_error (bfd_error_system_call);
+      return false;
+    }
+
+#ifdef HAVE_SYS_PROCFS_H
+
+  /* If no prpsinfo, just return true.  Otherwise, grab the last component
+     of the exec'd pathname from the prpsinfo. */
+
+  if (core_prpsinfo (core_bfd))
+    {
+      corename = (((prpsinfo_t *) core_prpsinfo (core_bfd))->pr_fname);
+    }
+  else
+    {
+      return true;
+    }
+
+  /* Find the last component of the executable pathname. */
+
+  if ((execname = strrchr (exec_bfd->filename, '/')) != NULL)
+    {
+      execname++;
+    }
+  else
+    {
+      execname = (char *) exec_bfd->filename;
+    }
+
+  /* See if they match */
+
+  return strcmp (execname, corename) ? false : true;
+
+#else
+
+  return true;
+
+#endif /* HAVE_SYS_PROCFS_H */
+}
+
+/* ELF core files contain a segment of type PT_NOTE, that holds much of
+   the information that would normally be available from the /proc interface
+   for the process, at the time the process dumped core.  Currently this
+   includes copies of the prstatus, prpsinfo, and fpregset structures.
+
+   Since these structures are potentially machine dependent in size and
+   ordering, bfd provides two levels of support for them.  The first level,
+   available on all machines since it does not require that the host
+   have /proc support or the relevant include files, is to create a bfd
+   section for each of the prstatus, prpsinfo, and fpregset structures,
+   without any interpretation of their contents.  With just this support,
+   the bfd client will have to interpret the structures itself.  Even with
+   /proc support, it might want these full structures for it's own reasons.
+
+   In the second level of support, where HAVE_SYS_PROCFS_H is defined,
+   bfd will pick apart the structures to gather some additional
+   information that clients may want, such as the general register
+   set, the name of the exec'ed file and its arguments, the signal (if
+   any) that caused the core dump, etc.
+
+   */
+
+static boolean
+elf_corefile_note (abfd, hdr)
+     bfd *abfd;
+     Elf_Internal_Phdr *hdr;
+{
+  Elf_External_Note *x_note_p;	/* Elf note, external form */
+  Elf_Internal_Note i_note;	/* Elf note, internal form */
+  char *buf = NULL;		/* Entire note segment contents */
+  char *namedata;		/* Name portion of the note */
+  char *descdata;		/* Descriptor portion of the note */
+  char *sectname;		/* Name to use for new section */
+  long filepos;			/* File offset to descriptor data */
+  asection *newsect;
+  int thread = 1;		/* Current thread number */
+
+#ifdef HAVE_SYS_PROCFS_H
+  did_reg = 0;			/* Non-zero if we made .reg section */
+  did_reg2 = 0;			/* Ditto for .reg2 */
+#endif
+
+  if (hdr->p_filesz > 0
+      && (buf = (char *) bfd_malloc ((size_t) hdr->p_filesz)) != NULL
+      && bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1
+      && bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz)
+    {
+      x_note_p = (Elf_External_Note *) buf;
+      while ((char *) x_note_p < (buf + hdr->p_filesz))
+	{
+	  i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz);
+	  i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz);
+	  i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type);
+	  namedata = x_note_p->name;
+	  descdata = namedata + BFD_ALIGN (i_note.namesz, 4);
+	  filepos = hdr->p_offset + (descdata - buf);
+	  switch (i_note.type)
+	    {
+	    case NT_PRSTATUS:
+	      /* process descdata as prstatus info */
+	      thread = get_thread (descdata);
+	      if (! bfd_prstatus (abfd, descdata, i_note.descsz, filepos,
+				  thread))
+		return false;
+	      sectname = NULL;
+	      break;
+	    case NT_FPREGSET:
+	      /* process descdata as fpregset info */
+	      if (! bfd_fpregset (abfd, descdata, i_note.descsz, filepos,
+				  thread))
+		return false;
+	      sectname = NULL;
+	      break;
+	    case NT_PRPSINFO:
+	      /* process descdata as prpsinfo */
+	      if (! bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos))
+		return false;
+	      sectname = ".prpsinfo";
+	      break;
+	    default:
+	      /* Unknown descriptor, just ignore it. */
+	      sectname = NULL;
+	      break;
+	    }
+	  if (sectname != NULL)
+	    {
+	      newsect = bfd_make_section (abfd, sectname);
+	      if (newsect == NULL)
+		return false;
+	      newsect->_raw_size = i_note.descsz;
+	      newsect->filepos = filepos;
+	      newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
+	      newsect->alignment_power = 2;
+	    }
+	  x_note_p = (Elf_External_Note *)
+	    (descdata + BFD_ALIGN (i_note.descsz, 4));
+	}
+    }
+  if (buf != NULL)
+    {
+      free (buf);
+    }
+  else if (hdr->p_filesz > 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_External_Phdr x_phdr;	/* Program header table entry, external form */
+  Elf_Internal_Phdr *i_phdrp;	/* Program header table, 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;
+    }
+
+  /* Now check to see if we have a valid ELF file, and one that BFD can
+     make use of.  The magic number must match, the address size ('class')
+     and byte-swapping must match our XVEC entry, and it must have a
+     program header table (FIXME: See comments re segments at top of this
+     file). */
+
+  if (elf_file_p (&x_ehdr) == false)
+    {
+    wrong:
+      bfd_set_error (bfd_error_wrong_format);
+      return NULL;
+    }
+
+  /* FIXME, Check EI_VERSION here !  */
+
+  {
+#if ARCH_SIZE == 32
+    int desired_address_size = ELFCLASS32;
+#endif
+#if ARCH_SIZE == 64
+    int desired_address_size = ELFCLASS64;
+#endif
+
+    if (x_ehdr.e_ident[EI_CLASS] != desired_address_size)
+      goto wrong;
+  }
+
+  /* Switch xvec to match the specified byte order.  */
+  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;
+    case ELFDATANONE:		/* No data encoding specified */
+    default:			/* Unknown data encoding specified */
+      goto wrong;
+    }
+
+  /* Allocate an instance of the elf_obj_tdata structure and hook it up to
+     the tdata pointer in the bfd. */
+
+  elf_tdata (abfd) =
+    (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
+  if (elf_tdata (abfd) == NULL)
+    return NULL;
+
+  /* FIXME, `wrong' returns from this point onward, leak memory.  */
+
+  /* Now that we know the byte order, swap in the rest of the header */
+  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;
+
+  /* Allocate space for a copy of the program header table in
+     internal form, seek to the program header table in the file,
+     read it in, and convert it to internal form.  As a simple sanity
+     check, verify that the what BFD thinks is the size of each program
+     header table entry actually matches the size recorded in the file. */
+
+  if (i_ehdrp->e_phentsize != sizeof (x_phdr))
+    goto wrong;
+  i_phdrp = (Elf_Internal_Phdr *)
+    bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum);
+  if (!i_phdrp)
+    return NULL;
+  if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1)
+    return NULL;
+  for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++)
+    {
+      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);
+    }
+
+  /* Once all of the program headers have been read and converted, we
+     can start processing them. */
+
+  for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++)
+    {
+      bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex);
+      if ((i_phdrp + phindex)->p_type == PT_NOTE)
+	{
+	  if (! elf_corefile_note (abfd, i_phdrp + phindex))
+	    return NULL;
+	}
+    }
+
+  /* Remember the entry point specified in the ELF file header. */
+
+  bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+
+  return abfd->xvec;
+}