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/* Auxiliary vector support for GDB, the GNU debugger.
Copyright (C) 2004-2023 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
#include "target.h"
/* See "include/elf/common.h" for the definition of valid AT_* values. */
/* The default implementation of to_auxv_parse, used by the target
stack.
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 default_auxv_parse (struct target_ops *ops, const gdb_byte **readptr,
const gdb_byte *endptr, CORE_ADDR *typep,
CORE_ADDR *valp);
/* The SVR4 psABI implementation of to_auxv_parse, that uses an int to
store the type rather than long as assumed by the default parser.
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 svr4_auxv_parse (struct gdbarch *gdbarch, const gdb_byte **readptr,
const gdb_byte *endptr, CORE_ADDR *typep,
CORE_ADDR *valp);
/* Read auxv data from the current inferior's target stack. */
extern const std::optional<gdb::byte_vector> &target_read_auxv ();
/* Read auxv data from OPS. */
extern std::optional<gdb::byte_vector> target_read_auxv_raw (target_ops *ops);
/* Search AUXV for an entry with a_type matching MATCH.
OPS and GDBARCH are the target and architecture to use to parse auxv entries.
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 (const gdb::byte_vector &auxv,
target_ops *ops, gdbarch *gdbarch,
CORE_ADDR match, CORE_ADDR *valp);
/* Same as the above, but read the auxv data from the current inferior. Use
the current inferior's top target and arch to parse auxv entries. */
extern int target_auxv_search (CORE_ADDR match, CORE_ADDR *valp);
/* Print a description of a single AUXV entry on the specified file. */
enum auxv_format { AUXV_FORMAT_DEC, AUXV_FORMAT_HEX, AUXV_FORMAT_STR };
extern void fprint_auxv_entry (struct ui_file *file, const char *name,
const char *description,
enum auxv_format format, CORE_ADDR type,
CORE_ADDR val);
/* The default implementation of gdbarch_print_auxv_entry. */
extern void default_print_auxv_entry (struct gdbarch *gdbarch,
struct ui_file *file, CORE_ADDR type,
CORE_ADDR val);
extern target_xfer_partial_ftype memory_xfer_auxv;
#endif
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