gdb/auxv.h

   1 /* Auxiliary vector support for GDB, the GNU debugger.
   2
   3    Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef AUXV_H
  22 #define AUXV_H
  23
  24 /* See "include/elf/common.h" for the definition of valid AT_* values.  */
  25
  26
  27 /* Avoid miscellaneous includes in this file, so that it can be
  28    included by nm-*.h for the procfs_xfer_auxv decl if that is
  29    used in NATIVE_XFER_AUXV.  */
  30 struct target_ops;              /* Forward declaration.  */
  31
  32
  33 /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR.
  34    Return 0 if *READPTR is already at the end of the buffer.
  35    Return -1 if there is insufficient buffer for a whole entry.
  36    Return 1 if an entry was read into *TYPEP and *VALP.  */
  37 extern int target_auxv_parse (struct target_ops *ops,
  38                               gdb_byte **readptr, gdb_byte *endptr,
  39                               CORE_ADDR *typep, CORE_ADDR *valp);
  40
  41 /* Extract the auxiliary vector entry with a_type matching MATCH.
  42    Return zero if no such entry was found, or -1 if there was
  43    an error getting the information.  On success, return 1 after
  44    storing the entry's value field in *VALP.  */
  45 extern int target_auxv_search (struct target_ops *ops,
  46                                CORE_ADDR match, CORE_ADDR *valp);
  47
  48 /* Print the contents of the target's AUXV on the specified file. */
  49 extern int fprint_target_auxv (struct ui_file *file, struct target_ops *ops);
  50
  51
  52 /* This function is called like a to_xfer_partial hook,
  53    but must be called with TARGET_OBJECT_AUXV.
  54    It handles access via /proc/PID/auxv, which is the common method.
  55    This function is appropriate for doing:
  56            #define NATIVE_XFER_AUXV     procfs_xfer_auxv
  57    for a native target that uses inftarg.c's child_xfer_partial hook.  */
  58
  59 extern LONGEST procfs_xfer_auxv (struct target_ops *ops,
  60                                  int /* enum target_object */ object,
  61                                  const char *annex,
  62                                  gdb_byte *readbuf,
  63                                  const gdb_byte *writebuf,
  64                                  ULONGEST offset,
  65                                  LONGEST len);
  66
  67
  68 #endif