gdb/gdbcore.h

   1 /* Machine independent variables that describe the core file under GDB.
   2
   3    Copyright (C) 1986-2020 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 /* Interface routines for core, executable, etc.  */
  21
  22 #if !defined (GDBCORE_H)
  23 #define GDBCORE_H 1
  24
  25 struct type;
  26 struct regcache;
  27
  28 #include "bfd.h"
  29 #include "exec.h"
  30 #include "target.h"
  31
  32 /* Nonzero if there is a core file.  */
  33
  34 extern int have_core_file_p (void);
  35
  36 /* Report a memory error with error().  */
  37
  38 extern void memory_error (enum target_xfer_status status, CORE_ADDR memaddr);
  39
  40 /* The string 'memory_error' would use as exception message.  */
  41
  42 extern std::string memory_error_message (enum target_xfer_status err,
  43                                          struct gdbarch *gdbarch,
  44                                          CORE_ADDR memaddr);
  45
  46 /* Like target_read_memory, but report an error if can't read.  */
  47
  48 extern void read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len);
  49
  50 /* Like target_read_stack, but report an error if can't read.  */
  51
  52 extern void read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len);
  53
  54 /* Like target_read_code, but report an error if can't read.  */
  55
  56 extern void read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len);
  57
  58 /* Read an integer from debugged memory, given address and number of
  59    bytes.  */
  60
  61 extern LONGEST read_memory_integer (CORE_ADDR memaddr,
  62                                     int len, enum bfd_endian byte_order);
  63 extern int safe_read_memory_integer (CORE_ADDR memaddr, int len,
  64                                      enum bfd_endian byte_order,
  65                                      LONGEST *return_value);
  66
  67 /* Read an unsigned integer from debugged memory, given address and
  68    number of bytes.  */
  69
  70 extern ULONGEST read_memory_unsigned_integer (CORE_ADDR memaddr,
  71                                               int len,
  72                                               enum bfd_endian byte_order);
  73 extern int safe_read_memory_unsigned_integer (CORE_ADDR memaddr, int len,
  74                                               enum bfd_endian byte_order,
  75                                               ULONGEST *return_value);
  76
  77 /* Read an integer from debugged code memory, given address,
  78    number of bytes, and byte order for code.  */
  79
  80 extern LONGEST read_code_integer (CORE_ADDR memaddr, int len,
  81                                   enum bfd_endian byte_order);
  82
  83 /* Read an unsigned integer from debugged code memory, given address,
  84    number of bytes, and byte order for code.  */
  85
  86 extern ULONGEST read_code_unsigned_integer (CORE_ADDR memaddr,
  87                                             int len,
  88                                             enum bfd_endian byte_order);
  89
  90 /* Read the pointer of type TYPE at ADDR, and return the address it
  91    represents.  */
  92
  93 CORE_ADDR read_memory_typed_address (CORE_ADDR addr, struct type *type);
  94
  95 /* Same as target_write_memory, but report an error if can't
  96    write.  */
  97
  98 extern void write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
  99                           ssize_t len);
 100
 101 /* Same as write_memory, but notify 'memory_changed' observers.  */
 102
 103 extern void write_memory_with_notification (CORE_ADDR memaddr,
 104                                             const bfd_byte *myaddr,
 105                                             ssize_t len);
 106
 107 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
 108 extern void write_memory_unsigned_integer (CORE_ADDR addr, int len,
 109                                            enum bfd_endian byte_order,
 110                                            ULONGEST value);
 111
 112 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
 113 extern void write_memory_signed_integer (CORE_ADDR addr, int len,
 114                                          enum bfd_endian byte_order,
 115                                          LONGEST value);
 116 \f
 117 /* Hook for `exec_file_command' command to call.  */
 118
 119 extern void (*deprecated_exec_file_display_hook) (const char *filename);
 120
 121 /* Hook for "file_command", which is more useful than above
 122    (because it is invoked AFTER symbols are read, not before).  */
 123
 124 extern void (*deprecated_file_changed_hook) (const char *filename);
 125
 126 extern void specify_exec_file_hook (void (*hook) (const char *filename));
 127
 128 /* Binary File Diddler for the core file.  */
 129
 130 #define core_bfd (current_program_space->cbfd.get ())
 131
 132 /* Whether to open exec and core files read-only or read-write.  */
 133
 134 extern bool write_files;
 135
 136 /* Open and set up the core file bfd.  */
 137
 138 extern void core_target_open (const char *arg, int from_tty);
 139
 140 extern void core_file_command (const char *filename, int from_tty);
 141
 142 extern void exec_file_attach (const char *filename, int from_tty);
 143
 144 /* If the filename of the main executable is unknown, attempt to
 145    determine it.  If a filename is determined, proceed as though
 146    it was just specified with the "file" command.  Do nothing if
 147    the filename of the main executable is already known.
 148    DEFER_BP_RESET uses SYMFILE_DEFER_BP_RESET for the main symbol file.  */
 149
 150 extern void exec_file_locate_attach (int pid, int defer_bp_reset, int from_tty);
 151
 152 extern void validate_files (void);
 153
 154 /* Give the user a message if the current exec file does not match the exec
 155    file determined from the target.  In case of mismatch, ask the user
 156    if the exec file determined from target must be loaded.  */
 157 extern void validate_exec_file (int from_tty);
 158
 159 /* The current default bfd target.  */
 160
 161 extern const char *gnutarget;
 162
 163 extern void set_gnutarget (const char *);
 164
 165 /* Build either a single-thread or multi-threaded section name for
 166    PTID.
 167
 168    If ptid's lwp member is zero, we want to do the single-threaded
 169    thing: look for a section named NAME (as passed to the
 170    constructor).  If ptid's lwp member is non-zero, we'll want do the
 171    multi-threaded thing: look for a section named "NAME/LWP", where
 172    LWP is the shortest ASCII decimal representation of ptid's lwp
 173    member.  */
 174
 175 class thread_section_name
 176 {
 177 public:
 178   /* NAME is the single-threaded section name.  If PTID represents an
 179      LWP, then the build section name is "NAME/LWP", otherwise it's
 180      just "NAME" unmodified.  */
 181   thread_section_name (const char *name, ptid_t ptid)
 182   {
 183     if (ptid.lwp_p ())
 184       {
 185         m_storage = string_printf ("%s/%ld", name, ptid.lwp ());
 186         m_section_name = m_storage.c_str ();
 187       }
 188     else
 189       m_section_name = name;
 190   }
 191
 192   /* Return the computed section name.  The result is valid as long as
 193      this thread_section_name object is live.  */
 194   const char *c_str () const
 195   { return m_section_name; }
 196
 197   DISABLE_COPY_AND_ASSIGN (thread_section_name);
 198
 199 private:
 200   /* Either a pointer into M_STORAGE, or a pointer to the name passed
 201      as parameter to the constructor.  */
 202   const char *m_section_name;
 203   /* If we need to build a new section name, this is where we store
 204      it.  */
 205   std::string m_storage;
 206 };
 207
 208 #endif /* !defined (GDBCORE_H) */