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 #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_error 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_error 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 /* Read an integer from debugged memory, given address and number of
  61    bytes.  */
  62
  63 extern LONGEST read_memory_integer (CORE_ADDR memaddr,
  64                                     int len, enum bfd_endian byte_order);
  65 extern int safe_read_memory_integer (CORE_ADDR memaddr, int len,
  66                                      enum bfd_endian byte_order,
  67                                      LONGEST *return_value);
  68
  69 /* Read an unsigned integer from debugged memory, given address and
  70    number of bytes.  */
  71
  72 extern ULONGEST read_memory_unsigned_integer (CORE_ADDR memaddr,
  73                                               int len,
  74                                               enum bfd_endian byte_order);
  75
  76 /* Read a null-terminated string from the debuggee's memory, given
  77    address, a buffer into which to place the string, and the maximum
  78    available space.  */
  79
  80 extern void read_memory_string (CORE_ADDR, char *, int);
  81
  82 /* Read the pointer of type TYPE at ADDR, and return the address it
  83    represents.  */
  84
  85 CORE_ADDR read_memory_typed_address (CORE_ADDR addr, struct type *type);
  86
  87 /* This takes a char *, not void *.  This is probably right, because
  88    passing in an int * or whatever is wrong with respect to
  89    byteswapping, alignment, different sizes for host vs. target types,
  90    etc.  */
  91
  92 extern void write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
  93                           ssize_t len);
  94
  95 /* Same as write_memory, but notify 'memory_changed' observers.  */
  96
  97 extern void write_memory_with_notification (CORE_ADDR memaddr,
  98                                             const bfd_byte *myaddr,
  99                                             ssize_t len);
 100
 101 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
 102 extern void write_memory_unsigned_integer (CORE_ADDR addr, int len,
 103                                            enum bfd_endian byte_order,
 104                                            ULONGEST value);
 105
 106 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
 107 extern void write_memory_signed_integer (CORE_ADDR addr, int len,
 108                                          enum bfd_endian byte_order,
 109                                          LONGEST value);
 110 \f
 111 /* Hook for `exec_file_command' command to call.  */
 112
 113 extern void (*deprecated_exec_file_display_hook) (char *filename);
 114
 115 /* Hook for "file_command", which is more useful than above
 116    (because it is invoked AFTER symbols are read, not before).  */
 117
 118 extern void (*deprecated_file_changed_hook) (char *filename);
 119
 120 extern void specify_exec_file_hook (void (*hook) (char *filename));
 121
 122 /* Binary File Diddler for the core file.  */
 123
 124 extern bfd *core_bfd;
 125
 126 extern struct target_ops *core_target;
 127
 128 /* Whether to open exec and core files read-only or read-write.  */
 129
 130 extern int write_files;
 131
 132 extern void core_file_command (char *filename, int from_tty);
 133
 134 extern void exec_file_attach (char *filename, int from_tty);
 135
 136 extern void exec_file_clear (int from_tty);
 137
 138 extern void validate_files (void);
 139
 140 /* The current default bfd target.  */
 141
 142 extern char *gnutarget;
 143
 144 extern void set_gnutarget (char *);
 145
 146 /* Structure to keep track of core register reading functions for
 147    various core file types.  */
 148
 149 struct core_fns
 150   {
 151
 152     /* BFD flavour that a core file handler is prepared to read.  This
 153        can be used by the handler's core tasting function as a first
 154        level filter to reject BFD's that don't have the right
 155        flavour.  */
 156
 157     enum bfd_flavour core_flavour;
 158
 159     /* Core file handler function to call to recognize corefile
 160        formats that BFD rejects.  Some core file format just don't fit
 161        into the BFD model, or may require other resources to identify
 162        them, that simply aren't available to BFD (such as symbols from
 163        another file).  Returns nonzero if the handler recognizes the
 164        format, zero otherwise.  */
 165
 166     int (*check_format) (bfd *);
 167
 168     /* Core file handler function to call to ask if it can handle a
 169        given core file format or not.  Returns zero if it can't,
 170        nonzero otherwise.  */
 171
 172     int (*core_sniffer) (struct core_fns *, bfd *);
 173
 174     /* Extract the register values out of the core file and supply them
 175        into REGCACHE.
 176
 177        CORE_REG_SECT points to the register values themselves, read into
 178        memory.
 179
 180        CORE_REG_SIZE is the size of that area.
 181
 182        WHICH says which set of registers we are handling:
 183          0 --- integer registers
 184          2 --- floating-point registers, on machines where they are
 185                discontiguous
 186          3 --- extended floating-point registers, on machines where
 187                these are present in yet a third area.  (GNU/Linux uses
 188                this to get at the SSE registers.)
 189
 190        REG_ADDR is the offset from u.u_ar0 to the register values relative to
 191        core_reg_sect.  This is used with old-fashioned core files to locate the
 192        registers in a large upage-plus-stack ".reg" section.  Original upage
 193        address X is at location core_reg_sect+x+reg_addr.  */
 194
 195     void (*core_read_registers) (struct regcache *regcache,
 196                                  char *core_reg_sect,
 197                                  unsigned core_reg_size,
 198                                  int which, CORE_ADDR reg_addr);
 199
 200     /* Finds the next struct core_fns.  They are allocated and
 201        initialized in whatever module implements the functions pointed
 202        to; an initializer calls deprecated_add_core_fns to add them to
 203        the global chain.  */
 204
 205     struct core_fns *next;
 206
 207   };
 208
 209 /* NOTE: cagney/2004-04-05: Replaced by "regset.h" and
 210    regset_from_core_section().  */
 211 extern void deprecated_add_core_fns (struct core_fns *cf);
 212 extern int default_core_sniffer (struct core_fns *cf, bfd * abfd);
 213 extern int default_check_format (bfd * abfd);
 214
 215 struct target_section *deprecated_core_resize_section_table (int num_added);
 216
 217 #endif /* !defined (GDBCORE_H) */