gdb/linux-tdep.h

   1 /* Target-dependent code for GNU/Linux, architecture independent.
   2
   3    Copyright (C) 2009-2023 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 3 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, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef LINUX_TDEP_H
  21 #define LINUX_TDEP_H
  22
  23 #include "bfd.h"
  24 #include "displaced-stepping.h"
  25
  26 struct inferior;
  27 struct regcache;
  28
  29 /* Enum used to define the extra fields of the siginfo type used by an
  30    architecture.  */
  31 enum linux_siginfo_extra_field_values
  32 {
  33   /* Add bound fields into the segmentation fault field.  */
  34   LINUX_SIGINFO_FIELD_ADDR_BND = 1
  35 };
  36
  37 /* Defines a type for the values defined in linux_siginfo_extra_field_values.  */
  38 DEF_ENUM_FLAGS_TYPE (enum linux_siginfo_extra_field_values,
  39                      linux_siginfo_extra_fields);
  40
  41 /* This function is suitable for architectures that
  42    extend/override the standard siginfo in a specific way.  */
  43 struct type *linux_get_siginfo_type_with_fields (struct gdbarch *gdbarch,
  44                                                  linux_siginfo_extra_fields);
  45
  46 /* Return true if ADDRESS is within the boundaries of a page mapped with
  47    memory tagging protection.  */
  48 bool linux_address_in_memtag_page (CORE_ADDR address);
  49
  50 typedef char *(*linux_collect_thread_registers_ftype) (const struct regcache *,
  51                                                        ptid_t,
  52                                                        bfd *, char *, int *,
  53                                                        enum gdb_signal);
  54
  55 extern enum gdb_signal linux_gdb_signal_from_target (struct gdbarch *gdbarch,
  56                                                      int signal);
  57
  58 extern int linux_gdb_signal_to_target (struct gdbarch *gdbarch,
  59                                        enum gdb_signal signal);
  60
  61 /* Default GNU/Linux implementation of `displaced_step_location', as
  62    defined in gdbarch.h.  Determines the entry point from AT_ENTRY in
  63    the target auxiliary vector.  */
  64 extern CORE_ADDR linux_displaced_step_location (struct gdbarch *gdbarch);
  65
  66
  67 /* Implementation of gdbarch_displaced_step_prepare.  */
  68
  69 extern displaced_step_prepare_status linux_displaced_step_prepare
  70   (gdbarch *arch, thread_info *thread, CORE_ADDR &displaced_pc);
  71
  72 /* Implementation of gdbarch_displaced_step_finish.  */
  73
  74 extern displaced_step_finish_status linux_displaced_step_finish
  75   (gdbarch *arch, thread_info *thread, gdb_signal sig);
  76
  77 /* Implementation of gdbarch_displaced_step_copy_insn_closure_by_addr.  */
  78
  79 extern const displaced_step_copy_insn_closure *
  80   linux_displaced_step_copy_insn_closure_by_addr
  81     (inferior *inf, CORE_ADDR addr);
  82
  83 /* Implementation of gdbarch_displaced_step_restore_all_in_ptid.  */
  84
  85 extern void linux_displaced_step_restore_all_in_ptid (inferior *parent_inf,
  86                                                       ptid_t ptid);
  87
  88 extern void linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch,
  89                             int num_disp_step_buffers);
  90
  91 extern int linux_is_uclinux (void);
  92
  93 /* Fetch the AT_HWCAP entry from auxv data AUXV.  Use TARGET and GDBARCH to
  94    parse auxv entries.
  95
  96    On error, 0 is returned.  */
  97 extern CORE_ADDR linux_get_hwcap (const gdb::optional<gdb::byte_vector> &auxv,
  98                                   struct target_ops *target, gdbarch *gdbarch);
  99
 100 /* Same as the above, but obtain all the inputs from the current inferior.  */
 101
 102 extern CORE_ADDR linux_get_hwcap ();
 103
 104 /* Fetch the AT_HWCAP2 entry from auxv data AUXV.  Use TARGET and GDBARCH to
 105    parse auxv entries.
 106
 107    On error, 0 is returned.  */
 108 extern CORE_ADDR linux_get_hwcap2 (const gdb::optional<gdb::byte_vector> &auxv,
 109                                    struct target_ops *target, gdbarch *gdbarch);
 110
 111 /* Same as the above, but obtain all the inputs from the current inferior.  */
 112
 113 extern CORE_ADDR linux_get_hwcap2 ();
 114
 115 /* Fetch (and possibly build) an appropriate `struct link_map_offsets'
 116    for ILP32 and LP64 Linux systems.  */
 117 extern struct link_map_offsets *linux_ilp32_fetch_link_map_offsets ();
 118 extern struct link_map_offsets *linux_lp64_fetch_link_map_offsets ();
 119
 120 #endif /* linux-tdep.h */