gdb/gdbcore.h

   1 /* Machine independent variables that describe the core file under GDB.
   2
   3    Copyright (C) 1986-2013 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
  31 /* Return the name of the executable file as a string.
  32    ERR nonzero means get error if there is none specified;
  33    otherwise return 0 in that case.  */
  34
  35 extern char *get_exec_file (int err);
  36
  37 /* Nonzero if there is a core file.  */
  38
  39 extern int have_core_file_p (void);
  40
  41 /* Report a memory error with error().  */
  42
  43 extern void memory_error (int status, CORE_ADDR memaddr);
  44
  45 /* Like target_read_memory, but report an error if can't read.  */
  46
  47 extern void read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len);
  48
  49 /* Like target_read_stack, but report an error if can't read.  */
  50
  51 extern void read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len);
  52
  53 /* Read an integer from debugged memory, given address and number of
  54    bytes.  */
  55
  56 extern LONGEST read_memory_integer (CORE_ADDR memaddr,
  57                                     int len, enum bfd_endian byte_order);
  58 extern int safe_read_memory_integer (CORE_ADDR memaddr, int len,
  59                                      enum bfd_endian byte_order,
  60                                      LONGEST *return_value);
  61
  62 /* Read an unsigned integer from debugged memory, given address and
  63    number of bytes.  */
  64
  65 extern ULONGEST read_memory_unsigned_integer (CORE_ADDR memaddr,
  66                                               int len,
  67                                               enum bfd_endian byte_order);
  68
  69 /* Read a null-terminated string from the debuggee's memory, given
  70    address, a buffer into which to place the string, and the maximum
  71    available space.  */
  72
  73 extern void read_memory_string (CORE_ADDR, char *, int);
  74
  75 /* Read the pointer of type TYPE at ADDR, and return the address it
  76    represents.  */
  77
  78 CORE_ADDR read_memory_typed_address (CORE_ADDR addr, struct type *type);
  79
  80 /* This takes a char *, not void *.  This is probably right, because
  81    passing in an int * or whatever is wrong with respect to
  82    byteswapping, alignment, different sizes for host vs. target types,
  83    etc.  */
  84
  85 extern void write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
  86                           ssize_t len);
  87
  88 /* Same as write_memory, but notify 'memory_changed' observers.  */
  89
  90 extern void write_memory_with_notification (CORE_ADDR memaddr,
  91                                             const bfd_byte *myaddr,
  92                                             ssize_t len);
  93
  94 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
  95 extern void write_memory_unsigned_integer (CORE_ADDR addr, int len,
  96                                            enum bfd_endian byte_order,
  97                                            ULONGEST value);
  98
  99 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
 100 extern void write_memory_signed_integer (CORE_ADDR addr, int len,
 101                                          enum bfd_endian byte_order,
 102                                          LONGEST value);
 103 \f
 104 /* Hook for `exec_file_command' command to call.  */
 105
 106 extern void (*deprecated_exec_file_display_hook) (char *filename);
 107
 108 /* Hook for "file_command", which is more useful than above
 109    (because it is invoked AFTER symbols are read, not before).  */
 110
 111 extern void (*deprecated_file_changed_hook) (char *filename);
 112
 113 extern void specify_exec_file_hook (void (*hook) (char *filename));
 114
 115 /* Binary File Diddler for the core file.  */
 116
 117 extern bfd *core_bfd;
 118
 119 extern struct target_ops *core_target;
 120
 121 /* Whether to open exec and core files read-only or read-write.  */
 122
 123 extern int write_files;
 124
 125 extern void core_file_command (char *filename, int from_tty);
 126
 127 extern void exec_file_attach (char *filename, int from_tty);
 128
 129 extern void exec_file_clear (int from_tty);
 130
 131 extern void validate_files (void);
 132
 133 /* The current default bfd target.  */
 134
 135 extern char *gnutarget;
 136
 137 extern void set_gnutarget (char *);
 138
 139 /* Structure to keep track of core register reading functions for
 140    various core file types.  */
 141
 142 struct core_fns
 143   {
 144
 145     /* BFD flavour that a core file handler is prepared to read.  This
 146        can be used by the handler's core tasting function as a first
 147        level filter to reject BFD's that don't have the right
 148        flavour.  */
 149
 150     enum bfd_flavour core_flavour;
 151
 152     /* Core file handler function to call to recognize corefile
 153        formats that BFD rejects.  Some core file format just don't fit
 154        into the BFD model, or may require other resources to identify
 155        them, that simply aren't available to BFD (such as symbols from
 156        another file).  Returns nonzero if the handler recognizes the
 157        format, zero otherwise.  */
 158
 159     int (*check_format) (bfd *);
 160
 161     /* Core file handler function to call to ask if it can handle a
 162        given core file format or not.  Returns zero if it can't,
 163        nonzero otherwise.  */
 164
 165     int (*core_sniffer) (struct core_fns *, bfd *);
 166
 167     /* Extract the register values out of the core file and supply them
 168        into REGCACHE.
 169
 170        CORE_REG_SECT points to the register values themselves, read into
 171        memory.
 172
 173        CORE_REG_SIZE is the size of that area.
 174
 175        WHICH says which set of registers we are handling:
 176          0 --- integer registers
 177          2 --- floating-point registers, on machines where they are
 178                discontiguous
 179          3 --- extended floating-point registers, on machines where
 180                these are present in yet a third area.  (GNU/Linux uses
 181                this to get at the SSE registers.)
 182
 183        REG_ADDR is the offset from u.u_ar0 to the register values relative to
 184        core_reg_sect.  This is used with old-fashioned core files to locate the
 185        registers in a large upage-plus-stack ".reg" section.  Original upage
 186        address X is at location core_reg_sect+x+reg_addr.  */
 187
 188     void (*core_read_registers) (struct regcache *regcache,
 189                                  char *core_reg_sect,
 190                                  unsigned core_reg_size,
 191                                  int which, CORE_ADDR reg_addr);
 192
 193     /* Finds the next struct core_fns.  They are allocated and
 194        initialized in whatever module implements the functions pointed
 195        to; an initializer calls deprecated_add_core_fns to add them to
 196        the global chain.  */
 197
 198     struct core_fns *next;
 199
 200   };
 201
 202 /* NOTE: cagney/2004-04-05: Replaced by "regset.h" and
 203    regset_from_core_section().  */
 204 extern void deprecated_add_core_fns (struct core_fns *cf);
 205 extern int default_core_sniffer (struct core_fns *cf, bfd * abfd);
 206 extern int default_check_format (bfd * abfd);
 207
 208 struct target_section *deprecated_core_resize_section_table (int num_added);
 209
 210 #endif /* !defined (GDBCORE_H) */