Initial revision

1 files changed, 230 insertions, 0 deletions

diff --git a/bfd/ptrace-core.c b/bfd/ptrace-core.c
new file mode 100644
index 0000000000..2b4fdbbd01
--- /dev/null
+++ b/bfd/ptrace-core.c
@@ -0,0 +1,230 @@
+/* BFD backend for core files which use the ptrace_user structure
+   Copyright 1993, 94, 95, 96, 1998 Free Software Foundation, Inc.
+   The structure of this file is based on trad-core.c written by John Gilmore
+   of Cygnus Support.
+   Modified to work with the ptrace_user structure by Kevin A. Buettner.
+   (Longterm it may be better to merge this file with trad-core.c)
+
+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.  */
+
+#ifdef PTRACE_CORE
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+
+#include <sys/param.h>
+#include <sys/dir.h>
+#include <signal.h>
+#include <sys/ptrace.h>
+
+
+struct trad_core_struct
+  {
+    asection *data_section;
+    asection *stack_section;
+    asection *reg_section;
+    struct ptrace_user u;
+  };
+
+#define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
+#define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
+#define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
+#define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)
+
+/* forward declarations */
+
+const bfd_target *ptrace_unix_core_file_p PARAMS ((bfd *abfd));
+char *		ptrace_unix_core_file_failing_command PARAMS ((bfd *abfd));
+int		ptrace_unix_core_file_failing_signal PARAMS ((bfd *abfd));
+boolean		ptrace_unix_core_file_matches_executable_p
+			 PARAMS ((bfd *core_bfd, bfd *exec_bfd));
+static void	swap_abort PARAMS ((void));
+
+/* ARGSUSED */
+const bfd_target *
+ptrace_unix_core_file_p (abfd)
+     bfd *abfd;
+
+{
+  int val;
+  struct ptrace_user u;
+  struct trad_core_struct *rawptr;
+
+  val = bfd_read ((void *)&u, 1, sizeof u, abfd);
+  if (val != sizeof u || u.pt_magic != _BCS_PTRACE_MAGIC 
+      || u.pt_rev != _BCS_PTRACE_REV)
+    {
+      /* Too small to be a core file */
+      bfd_set_error (bfd_error_wrong_format);
+      return 0;
+    }
+
+  /* OK, we believe you.  You're a core file (sure, sure).  */
+
+  /* Allocate both the upage and the struct core_data at once, so
+     a single free() will free them both.  */
+  rawptr = (struct trad_core_struct *)
+		bfd_zalloc (abfd, sizeof (struct trad_core_struct));
+
+  if (rawptr == NULL)
+    return 0;
+  
+  abfd->tdata.trad_core_data = rawptr;
+
+  rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */
+
+  /* Create the sections.  This is raunchy, but bfd_close wants to free
+     them separately.  */
+
+  core_stacksec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
+  if (core_stacksec (abfd) == NULL)
+    return NULL;
+  core_datasec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
+  if (core_datasec (abfd) == NULL)
+    return NULL;
+  core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
+  if (core_regsec (abfd) == NULL)
+    return NULL;
+
+  core_stacksec (abfd)->name = ".stack";
+  core_datasec (abfd)->name = ".data";
+  core_regsec (abfd)->name = ".reg";
+
+  /* FIXME:  Need to worry about shared memory, library data, and library
+     text.  I don't think that any of these things are supported on the
+     system on which I am developing this for though. */
+
+
+  core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
+  core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
+  core_regsec (abfd)->flags = SEC_HAS_CONTENTS;
+
+  core_datasec (abfd)->_raw_size =  u.pt_dsize;
+  core_stacksec (abfd)->_raw_size = u.pt_ssize;
+  core_regsec (abfd)->_raw_size = sizeof(u);
+
+  core_datasec (abfd)->vma = u.pt_o_data_start;
+  core_stacksec (abfd)->vma = USRSTACK - u.pt_ssize;
+  core_regsec (abfd)->vma = 0 - sizeof(u);	/* see trad-core.c */
+
+  core_datasec (abfd)->filepos = (int) u.pt_dataptr;
+  core_stacksec (abfd)->filepos = (int) (u.pt_dataptr + u.pt_dsize);
+  core_regsec (abfd)->filepos = 0; /* Register segment is ptrace_user */
+
+  /* Align to word at least */
+  core_stacksec (abfd)->alignment_power = 2;
+  core_datasec (abfd)->alignment_power = 2;
+  core_regsec (abfd)->alignment_power = 2;
+
+  abfd->sections = core_stacksec (abfd);
+  core_stacksec (abfd)->next = core_datasec (abfd);
+  core_datasec (abfd)->next = core_regsec (abfd);
+  abfd->section_count = 3;
+
+  return abfd->xvec;
+}
+
+char *
+ptrace_unix_core_file_failing_command (abfd)
+     bfd *abfd;
+{
+  char *com = abfd->tdata.trad_core_data->u.pt_comm;
+  if (*com)
+    return com;
+  else
+    return 0;
+}
+
+/* ARGSUSED */
+int
+ptrace_unix_core_file_failing_signal (abfd)
+     bfd *abfd;
+{
+  return abfd->tdata.trad_core_data->u.pt_sigframe.sig_num;
+}
+
+/* ARGSUSED */
+boolean
+ptrace_unix_core_file_matches_executable_p  (core_bfd, exec_bfd)
+     bfd *core_bfd, *exec_bfd;
+{
+  /* FIXME: Use pt_timdat field of the ptrace_user structure to match 
+     the date of the executable */
+  return true;
+}
+
+/* If somebody calls any byte-swapping routines, shoot them.  */
+static void
+swap_abort()
+{
+  abort(); /* This way doesn't require any declaration for ANSI to fuck up */
+}
+#define	NO_GET	((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
+#define	NO_PUT	((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
+#define	NO_SIGNED_GET \
+  ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
+
+const bfd_target ptrace_core_vec =
+  {
+    "trad-core",
+    bfd_target_unknown_flavour,
+    BFD_ENDIAN_UNKNOWN,		/* target byte order */
+    BFD_ENDIAN_UNKNOWN,		/* target headers byte order */
+    (HAS_RELOC | EXEC_P |	/* object flags */
+     HAS_LINENO | HAS_DEBUG |
+     HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
+    (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
+    0,			                                   /* symbol prefix */
+    ' ',						   /* ar_pad_char */
+    16,							   /* ar_max_namelen */
+    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 64 bit data */
+    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 32 bit data */
+    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 16 bit data */
+    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 64 bit hdrs */
+    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 32 bit hdrs */
+    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 16 bit hdrs */
+
+    {				/* bfd_check_format */
+     _bfd_dummy_target,		/* unknown format */
+     _bfd_dummy_target,		/* object file */
+     _bfd_dummy_target,		/* archive */
+     ptrace_unix_core_file_p	/* a core file */
+    },
+    {				/* bfd_set_format */
+     bfd_false, bfd_false,
+     bfd_false, bfd_false
+    },
+    {				/* bfd_write_contents */
+     bfd_false, bfd_false,
+     bfd_false, bfd_false
+    },
+    
+       BFD_JUMP_TABLE_GENERIC (_bfd_generic),
+       BFD_JUMP_TABLE_COPY (_bfd_generic),
+       BFD_JUMP_TABLE_CORE (ptrace_unix),
+       BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
+       BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
+       BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
+       BFD_JUMP_TABLE_WRITE (_bfd_generic),
+       BFD_JUMP_TABLE_LINK (_bfd_nolink),
+       BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
+
+    (PTR) 0			/* backend_data */
+};
+
+#endif /* PTRACE_CORE */