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/* Auxiliary vector support for GDB, the GNU debugger.

   Copyright (C) 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.

   This file is part of GDB.

   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 3 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, see <http://www.gnu.org/licenses/>.  */

#ifndef AUXV_H

#define AUXV_H

/* See "include/elf/common.h" for the definition of valid AT_* values.  */

/* Avoid miscellaneous includes in this file, so that it can be

   included by nm-*.h for the procfs_xfer_auxv decl if that is

   used in NATIVE_XFER_AUXV.  */

struct target_ops;              /* Forward declaration.  */

/* Read one auxv entry from *READPTR, not reading locations >= ENDPTR.

   Return 0 if *READPTR is already at the end of the buffer.

   Return -1 if there is insufficient buffer for a whole entry.

   Return 1 if an entry was read into *TYPEP and *VALP.  */

extern int target_auxv_parse (struct target_ops *ops,

                              gdb_byte **readptr, gdb_byte *endptr,

                              CORE_ADDR *typep, CORE_ADDR *valp);

/* Extract the auxiliary vector entry with a_type matching MATCH.

   Return zero if no such entry was found, or -1 if there was

   an error getting the information.  On success, return 1 after

   storing the entry's value field in *VALP.  */

extern int target_auxv_search (struct target_ops *ops,

                               CORE_ADDR match, CORE_ADDR *valp);

/* Print the contents of the target's AUXV on the specified file. */

extern int fprint_target_auxv (struct ui_file *file, struct target_ops *ops);

/* This function is called like a to_xfer_partial hook,

   but must be called with TARGET_OBJECT_AUXV.

   It handles access via /proc/PID/auxv, which is the common method.

   This function is appropriate for doing:

           #define NATIVE_XFER_AUXV     procfs_xfer_auxv

   for a native target that uses inftarg.c's child_xfer_partial hook.  */

extern LONGEST procfs_xfer_auxv (struct target_ops *ops,

                                 int /* enum target_object */ object,

                                 const char *annex,

                                 gdb_byte *readbuf,

                                 const gdb_byte *writebuf,

                                 ULONGEST offset,

                                 LONGEST len);

#endif