gdb/gdbcore.h

   1 /* Machine independent variables that describe the core file under GDB.
   2
   3    Copyright (C) 1986-2024 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
 118 /* Hook for "file_command", which is more useful than above
 119    (because it is invoked AFTER symbols are read, not before).  */
 120
 121 extern void (*deprecated_file_changed_hook) (const char *filename);
 122
 123 /* Binary File Diddler for the core file.  */
 124
 125 #define core_bfd (current_program_space->cbfd.get ())
 126
 127 /* Whether to open exec and core files read-only or read-write.  */
 128
 129 extern bool write_files;
 130
 131 /* Open and set up the core file bfd.  */
 132
 133 extern void core_target_open (const char *arg, int from_tty);
 134
 135 extern void core_file_command (const char *filename, int from_tty);
 136
 137 extern void exec_file_attach (const char *filename, int from_tty);
 138
 139 /* If the filename of the main executable is unknown, attempt to
 140    determine it.  If a filename is determined, proceed as though
 141    it was just specified with the "file" command.  Do nothing if
 142    the filename of the main executable is already known.
 143    DEFER_BP_RESET uses SYMFILE_DEFER_BP_RESET for the main symbol file.  */
 144
 145 extern void exec_file_locate_attach (int pid, int defer_bp_reset, int from_tty);
 146
 147 extern void validate_files (void);
 148
 149 /* Give the user a message if the current exec file does not match the exec
 150    file determined from the target.  In case of mismatch, ask the user
 151    if the exec file determined from target must be loaded.  */
 152 extern void validate_exec_file (int from_tty);
 153
 154 /* The current default bfd target.  */
 155
 156 extern const char *gnutarget;
 157
 158 extern void set_gnutarget (const char *);
 159
 160 /* Build either a single-thread or multi-threaded section name for
 161    PTID.
 162
 163    If ptid's lwp member is zero, we want to do the single-threaded
 164    thing: look for a section named NAME (as passed to the
 165    constructor).  If ptid's lwp member is non-zero, we'll want do the
 166    multi-threaded thing: look for a section named "NAME/LWP", where
 167    LWP is the shortest ASCII decimal representation of ptid's lwp
 168    member.  */
 169
 170 class thread_section_name
 171 {
 172 public:
 173   /* NAME is the single-threaded section name.  If PTID represents an
 174      LWP, then the build section name is "NAME/LWP", otherwise it's
 175      just "NAME" unmodified.  */
 176   thread_section_name (const char *name, ptid_t ptid)
 177   {
 178     if (ptid.lwp_p ())
 179       {
 180         m_storage = string_printf ("%s/%ld", name, ptid.lwp ());
 181         m_section_name = m_storage.c_str ();
 182       }
 183     else
 184       m_section_name = name;
 185   }
 186
 187   /* Return the computed section name.  The result is valid as long as
 188      this thread_section_name object is live.  */
 189   const char *c_str () const
 190   { return m_section_name; }
 191
 192   DISABLE_COPY_AND_ASSIGN (thread_section_name);
 193
 194 private:
 195   /* Either a pointer into M_STORAGE, or a pointer to the name passed
 196      as parameter to the constructor.  */
 197   const char *m_section_name;
 198   /* If we need to build a new section name, this is where we store
 199      it.  */
 200   std::string m_storage;
 201 };
 202
 203 #endif /* !defined (GDBCORE_H) */