gdb/gdbcore.h

   1 /* Machine independent variables that describe the core file under GDB.
   2
   3    Copyright (C) 1986-2016 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 /* Return the name of the executable file as a string.
  33    ERR nonzero means get error if there is none specified;
  34    otherwise return 0 in that case.  */
  35
  36 extern char *get_exec_file (int err);
  37
  38 /* Nonzero if there is a core file.  */
  39
  40 extern int have_core_file_p (void);
  41
  42 /* Report a memory error with error().  */
  43
  44 extern void memory_error (enum target_xfer_status status, CORE_ADDR memaddr);
  45
  46 /* The string 'memory_error' would use as exception message.  Space
  47    for the result is malloc'd, caller must free.  */
  48
  49 extern char *memory_error_message (enum target_xfer_status err,
  50                                    struct gdbarch *gdbarch, CORE_ADDR memaddr);
  51
  52 /* Like target_read_memory, but report an error if can't read.  */
  53
  54 extern void read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len);
  55
  56 /* Like target_read_stack, but report an error if can't read.  */
  57
  58 extern void read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len);
  59
  60 /* Like target_read_code, but report an error if can't read.  */
  61
  62 extern void read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len);
  63
  64 /* Read an integer from debugged memory, given address and number of
  65    bytes.  */
  66
  67 extern LONGEST read_memory_integer (CORE_ADDR memaddr,
  68                                     int len, enum bfd_endian byte_order);
  69 extern int safe_read_memory_integer (CORE_ADDR memaddr, int len,
  70                                      enum bfd_endian byte_order,
  71                                      LONGEST *return_value);
  72
  73 /* Read an unsigned integer from debugged memory, given address and
  74    number of bytes.  */
  75
  76 extern ULONGEST read_memory_unsigned_integer (CORE_ADDR memaddr,
  77                                               int len,
  78                                               enum bfd_endian byte_order);
  79
  80 /* Read an integer from debugged code memory, given address,
  81    number of bytes, and byte order for code.  */
  82
  83 extern LONGEST read_code_integer (CORE_ADDR memaddr, int len,
  84                                   enum bfd_endian byte_order);
  85
  86 /* Read an unsigned integer from debugged code memory, given address,
  87    number of bytes, and byte order for code.  */
  88
  89 extern ULONGEST read_code_unsigned_integer (CORE_ADDR memaddr,
  90                                             int len,
  91                                             enum bfd_endian byte_order);
  92
  93 /* Read a null-terminated string from the debuggee's memory, given
  94    address, a buffer into which to place the string, and the maximum
  95    available space.  */
  96
  97 extern void read_memory_string (CORE_ADDR, char *, int);
  98
  99 /* Read the pointer of type TYPE at ADDR, and return the address it
 100    represents.  */
 101
 102 CORE_ADDR read_memory_typed_address (CORE_ADDR addr, struct type *type);
 103
 104 /* Same as target_write_memory, but report an error if can't
 105    write.  */
 106
 107 extern void write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
 108                           ssize_t len);
 109
 110 /* Same as write_memory, but notify 'memory_changed' observers.  */
 111
 112 extern void write_memory_with_notification (CORE_ADDR memaddr,
 113                                             const bfd_byte *myaddr,
 114                                             ssize_t len);
 115
 116 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
 117 extern void write_memory_unsigned_integer (CORE_ADDR addr, int len,
 118                                            enum bfd_endian byte_order,
 119                                            ULONGEST value);
 120
 121 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
 122 extern void write_memory_signed_integer (CORE_ADDR addr, int len,
 123                                          enum bfd_endian byte_order,
 124                                          LONGEST value);
 125 \f
 126 /* Hook for `exec_file_command' command to call.  */
 127
 128 extern void (*deprecated_exec_file_display_hook) (const char *filename);
 129
 130 /* Hook for "file_command", which is more useful than above
 131    (because it is invoked AFTER symbols are read, not before).  */
 132
 133 extern void (*deprecated_file_changed_hook) (char *filename);
 134
 135 extern void specify_exec_file_hook (void (*hook) (const char *filename));
 136
 137 /* Binary File Diddler for the core file.  */
 138
 139 extern bfd *core_bfd;
 140
 141 extern struct target_ops *core_target;
 142
 143 /* Whether to open exec and core files read-only or read-write.  */
 144
 145 extern int write_files;
 146
 147 extern void core_file_command (char *filename, int from_tty);
 148
 149 extern void exec_file_attach (const char *filename, int from_tty);
 150
 151 /* If the filename of the main executable is unknown, attempt to
 152    determine it.  If a filename is determined, proceed as though
 153    it was just specified with the "file" command.  Do nothing if
 154    the filename of the main executable is already known.  */
 155
 156 extern void exec_file_locate_attach (int pid, int from_tty);
 157
 158 extern void exec_file_clear (int from_tty);
 159
 160 extern void validate_files (void);
 161
 162 /* The current default bfd target.  */
 163
 164 extern char *gnutarget;
 165
 166 extern void set_gnutarget (char *);
 167
 168 /* Structure to keep track of core register reading functions for
 169    various core file types.  */
 170
 171 struct core_fns
 172   {
 173
 174     /* BFD flavour that a core file handler is prepared to read.  This
 175        can be used by the handler's core tasting function as a first
 176        level filter to reject BFD's that don't have the right
 177        flavour.  */
 178
 179     enum bfd_flavour core_flavour;
 180
 181     /* Core file handler function to call to recognize corefile
 182        formats that BFD rejects.  Some core file format just don't fit
 183        into the BFD model, or may require other resources to identify
 184        them, that simply aren't available to BFD (such as symbols from
 185        another file).  Returns nonzero if the handler recognizes the
 186        format, zero otherwise.  */
 187
 188     int (*check_format) (bfd *);
 189
 190     /* Core file handler function to call to ask if it can handle a
 191        given core file format or not.  Returns zero if it can't,
 192        nonzero otherwise.  */
 193
 194     int (*core_sniffer) (struct core_fns *, bfd *);
 195
 196     /* Extract the register values out of the core file and supply them
 197        into REGCACHE.
 198
 199        CORE_REG_SECT points to the register values themselves, read into
 200        memory.
 201
 202        CORE_REG_SIZE is the size of that area.
 203
 204        WHICH says which set of registers we are handling:
 205          0 --- integer registers
 206          2 --- floating-point registers, on machines where they are
 207                discontiguous
 208          3 --- extended floating-point registers, on machines where
 209                these are present in yet a third area.  (GNU/Linux uses
 210                this to get at the SSE registers.)
 211
 212        REG_ADDR is the offset from u.u_ar0 to the register values relative to
 213        core_reg_sect.  This is used with old-fashioned core files to locate the
 214        registers in a large upage-plus-stack ".reg" section.  Original upage
 215        address X is at location core_reg_sect+x+reg_addr.  */
 216
 217     void (*core_read_registers) (struct regcache *regcache,
 218                                  char *core_reg_sect,
 219                                  unsigned core_reg_size,
 220                                  int which, CORE_ADDR reg_addr);
 221
 222     /* Finds the next struct core_fns.  They are allocated and
 223        initialized in whatever module implements the functions pointed
 224        to; an initializer calls deprecated_add_core_fns to add them to
 225        the global chain.  */
 226
 227     struct core_fns *next;
 228
 229   };
 230
 231 /* NOTE: cagney/2004-04-05: Replaced by "regset.h" and
 232    regset_from_core_section().  */
 233 extern void deprecated_add_core_fns (struct core_fns *cf);
 234 extern int default_core_sniffer (struct core_fns *cf, bfd * abfd);
 235 extern int default_check_format (bfd * abfd);
 236
 237 #endif /* !defined (GDBCORE_H) */