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 extern int safe_read_memory_unsigned_integer (CORE_ADDR memaddr, int len,
  80                                               enum bfd_endian byte_order,
  81                                               ULONGEST *return_value);
  82
  83 /* Read an integer from debugged code memory, given address,
  84    number of bytes, and byte order for code.  */
  85
  86 extern LONGEST read_code_integer (CORE_ADDR memaddr, int len,
  87                                   enum bfd_endian byte_order);
  88
  89 /* Read an unsigned integer from debugged code memory, given address,
  90    number of bytes, and byte order for code.  */
  91
  92 extern ULONGEST read_code_unsigned_integer (CORE_ADDR memaddr,
  93                                             int len,
  94                                             enum bfd_endian byte_order);
  95
  96 /* Read a null-terminated string from the debuggee's memory, given
  97    address, a buffer into which to place the string, and the maximum
  98    available space.  */
  99
 100 extern void read_memory_string (CORE_ADDR, char *, int);
 101
 102 /* Read the pointer of type TYPE at ADDR, and return the address it
 103    represents.  */
 104
 105 CORE_ADDR read_memory_typed_address (CORE_ADDR addr, struct type *type);
 106
 107 /* Same as target_write_memory, but report an error if can't
 108    write.  */
 109
 110 extern void write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
 111                           ssize_t len);
 112
 113 /* Same as write_memory, but notify 'memory_changed' observers.  */
 114
 115 extern void write_memory_with_notification (CORE_ADDR memaddr,
 116                                             const bfd_byte *myaddr,
 117                                             ssize_t len);
 118
 119 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
 120 extern void write_memory_unsigned_integer (CORE_ADDR addr, int len,
 121                                            enum bfd_endian byte_order,
 122                                            ULONGEST value);
 123
 124 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
 125 extern void write_memory_signed_integer (CORE_ADDR addr, int len,
 126                                          enum bfd_endian byte_order,
 127                                          LONGEST value);
 128 \f
 129 /* Hook for `exec_file_command' command to call.  */
 130
 131 extern void (*deprecated_exec_file_display_hook) (const char *filename);
 132
 133 /* Hook for "file_command", which is more useful than above
 134    (because it is invoked AFTER symbols are read, not before).  */
 135
 136 extern void (*deprecated_file_changed_hook) (char *filename);
 137
 138 extern void specify_exec_file_hook (void (*hook) (const char *filename));
 139
 140 /* Binary File Diddler for the core file.  */
 141
 142 extern bfd *core_bfd;
 143
 144 extern struct target_ops *core_target;
 145
 146 /* Whether to open exec and core files read-only or read-write.  */
 147
 148 extern int write_files;
 149
 150 extern void core_file_command (char *filename, int from_tty);
 151
 152 extern void exec_file_attach (const char *filename, int from_tty);
 153
 154 /* If the filename of the main executable is unknown, attempt to
 155    determine it.  If a filename is determined, proceed as though
 156    it was just specified with the "file" command.  Do nothing if
 157    the filename of the main executable is already known.
 158    DEFER_BP_RESET uses SYMFILE_DEFER_BP_RESET for the main symbol file.  */
 159
 160 extern void exec_file_locate_attach (int pid, int defer_bp_reset, int from_tty);
 161
 162 extern void exec_file_clear (int from_tty);
 163
 164 extern void validate_files (void);
 165
 166 /* The current default bfd target.  */
 167
 168 extern char *gnutarget;
 169
 170 extern void set_gnutarget (char *);
 171
 172 /* Structure to keep track of core register reading functions for
 173    various core file types.  */
 174
 175 struct core_fns
 176   {
 177
 178     /* BFD flavour that a core file handler is prepared to read.  This
 179        can be used by the handler's core tasting function as a first
 180        level filter to reject BFD's that don't have the right
 181        flavour.  */
 182
 183     enum bfd_flavour core_flavour;
 184
 185     /* Core file handler function to call to recognize corefile
 186        formats that BFD rejects.  Some core file format just don't fit
 187        into the BFD model, or may require other resources to identify
 188        them, that simply aren't available to BFD (such as symbols from
 189        another file).  Returns nonzero if the handler recognizes the
 190        format, zero otherwise.  */
 191
 192     int (*check_format) (bfd *);
 193
 194     /* Core file handler function to call to ask if it can handle a
 195        given core file format or not.  Returns zero if it can't,
 196        nonzero otherwise.  */
 197
 198     int (*core_sniffer) (struct core_fns *, bfd *);
 199
 200     /* Extract the register values out of the core file and supply them
 201        into REGCACHE.
 202
 203        CORE_REG_SECT points to the register values themselves, read into
 204        memory.
 205
 206        CORE_REG_SIZE is the size of that area.
 207
 208        WHICH says which set of registers we are handling:
 209          0 --- integer registers
 210          2 --- floating-point registers, on machines where they are
 211                discontiguous
 212          3 --- extended floating-point registers, on machines where
 213                these are present in yet a third area.  (GNU/Linux uses
 214                this to get at the SSE registers.)
 215
 216        REG_ADDR is the offset from u.u_ar0 to the register values relative to
 217        core_reg_sect.  This is used with old-fashioned core files to locate the
 218        registers in a large upage-plus-stack ".reg" section.  Original upage
 219        address X is at location core_reg_sect+x+reg_addr.  */
 220
 221     void (*core_read_registers) (struct regcache *regcache,
 222                                  char *core_reg_sect,
 223                                  unsigned core_reg_size,
 224                                  int which, CORE_ADDR reg_addr);
 225
 226     /* Finds the next struct core_fns.  They are allocated and
 227        initialized in whatever module implements the functions pointed
 228        to; an initializer calls deprecated_add_core_fns to add them to
 229        the global chain.  */
 230
 231     struct core_fns *next;
 232
 233   };
 234
 235 /* NOTE: cagney/2004-04-05: Replaced by "regset.h" and
 236    regset_from_core_section().  */
 237 extern void deprecated_add_core_fns (struct core_fns *cf);
 238 extern int default_core_sniffer (struct core_fns *cf, bfd * abfd);
 239 extern int default_check_format (bfd * abfd);
 240
 241 #endif /* !defined (GDBCORE_H) */