1 /* Auxiliary vector support for GDB, the GNU debugger. 2 3 Copyright 2004 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 2 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 59 Temple Place - Suite 330, 20 Boston, MA 02111-1307, USA. */ 21 22 #ifndef AUXV_H 23 #define AUXV_H 24 25 /* See "include/elf/common.h" for the definition of valid AT_* values. */ 26 27 28 /* Avoid miscellaneous includes in this file, so that it can be 29 included by nm-*.h for the procfs_xfer_auxv decl if that is 30 used in NATIVE_XFER_AUXV. */ 31 struct target_ops; /* Forward declaration. */ 32 33 34 /* Read all the auxv data into a contiguous xmalloc'd buffer, 35 stored in *DATA. Return the size in bytes of this data. 36 If zero, there is no data and *DATA is null. 37 if < 0, there was an error and *DATA is null. */ 38 extern LONGEST target_auxv_read (struct target_ops *ops, char **data); 39 40 /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR. 41 Return 0 if *READPTR is already at the end of the buffer. 42 Return -1 if there is insufficient buffer for a whole entry. 43 Return 1 if an entry was read into *TYPEP and *VALP. */ 44 extern int target_auxv_parse (struct target_ops *ops, 45 char **readptr, char *endptr, 46 CORE_ADDR *typep, CORE_ADDR *valp); 47 48 /* Extract the auxiliary vector entry with a_type matching MATCH. 49 Return zero if no such entry was found, or -1 if there was 50 an error getting the information. On success, return 1 after 51 storing the entry's value field in *VALP. */ 52 extern int target_auxv_search (struct target_ops *ops, 53 CORE_ADDR match, CORE_ADDR *valp); 54 55 /* Print the contents of the target's AUXV on the specified file. */ 56 extern int fprint_target_auxv (struct ui_file *file, struct target_ops *ops); 57 58 59 /* This function is called like a to_xfer_partial hook, 60 but must be called with TARGET_OBJECT_AUXV. 61 It handles access via /proc/PID/auxv, which is the common method. 62 This function is appropriate for doing: 63 #define NATIVE_XFER_AUXV procfs_xfer_auxv 64 for a native target that uses inftarg.c's child_xfer_partial hook. */ 65 66 extern LONGEST procfs_xfer_auxv (struct target_ops *ops, 67 int /* enum target_object */ object, 68 const char *annex, 69 void *readbuf, 70 const void *writebuf, 71 ULONGEST offset, 72 LONGEST len); 73 74 75 #endif 76