gdb/gdbcore.h

   1 /* Machine independent variables that describe the core file under GDB.
   2
   3    Copyright (C) 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
   4    1997, 1998, 1999, 2000, 2001, 2004, 2007, 2008, 2009
   5    Free Software Foundation, Inc.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 /* Interface routines for core, executable, etc.  */
  23
  24 #if !defined (GDBCORE_H)
  25 #define GDBCORE_H 1
  26
  27 struct type;
  28 struct regcache;
  29
  30 #include "bfd.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 (int status, 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, int len);
  49
  50 /* Read an integer from debugged memory, given address and number of
  51    bytes.  */
  52
  53 extern LONGEST read_memory_integer (CORE_ADDR memaddr,
  54                                     int len, enum bfd_endian byte_order);
  55 extern int safe_read_memory_integer (CORE_ADDR memaddr, int len,
  56                                      enum bfd_endian byte_order, LONGEST *return_value);
  57
  58 /* Read an unsigned integer from debugged memory, given address and
  59    number of bytes.  */
  60
  61 extern ULONGEST read_memory_unsigned_integer (CORE_ADDR memaddr,
  62                                               int len, enum bfd_endian byte_order);
  63
  64 /* Read a null-terminated string from the debuggee's memory, given address,
  65  * a buffer into which to place the string, and the maximum available space */
  66
  67 extern void read_memory_string (CORE_ADDR, char *, int);
  68
  69 /* Read the pointer of type TYPE at ADDR, and return the address it
  70    represents. */
  71
  72 CORE_ADDR read_memory_typed_address (CORE_ADDR addr, struct type *type);
  73
  74 /* This takes a char *, not void *.  This is probably right, because
  75    passing in an int * or whatever is wrong with respect to
  76    byteswapping, alignment, different sizes for host vs. target types,
  77    etc.  */
  78
  79 extern void write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, int len);
  80
  81 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
  82 extern void write_memory_unsigned_integer (CORE_ADDR addr, int len,
  83                                            enum bfd_endian byte_order,
  84                                            ULONGEST value);
  85
  86 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
  87 extern void write_memory_signed_integer (CORE_ADDR addr, int len,
  88                                          enum bfd_endian byte_order,
  89                                          LONGEST value);
  90 \f
  91 /* Hook for `exec_file_command' command to call.  */
  92
  93 extern void (*deprecated_exec_file_display_hook) (char *filename);
  94
  95 /* Hook for "file_command", which is more useful than above
  96    (because it is invoked AFTER symbols are read, not before).  */
  97
  98 extern void (*deprecated_file_changed_hook) (char *filename);
  99
 100 extern void specify_exec_file_hook (void (*hook) (char *filename));
 101
 102 /* Binary File Diddlers for the exec and core files.  */
 103
 104 extern bfd *core_bfd;
 105 extern bfd *exec_bfd;
 106
 107 /* The mtime when we last opened exec_bfd.  */
 108 extern long exec_bfd_mtime;
 109
 110 /* Whether to open exec and core files read-only or read-write.  */
 111
 112 extern int write_files;
 113
 114 extern void core_file_command (char *filename, int from_tty);
 115
 116 extern void exec_file_attach (char *filename, int from_tty);
 117
 118 extern void exec_file_clear (int from_tty);
 119
 120 extern void validate_files (void);
 121
 122 /* The current default bfd target.  */
 123
 124 extern char *gnutarget;
 125
 126 extern void set_gnutarget (char *);
 127
 128 /* Structure to keep track of core register reading functions for
 129    various core file types.  */
 130
 131 struct core_fns
 132   {
 133
 134     /* BFD flavour that a core file handler is prepared to read.  This
 135        can be used by the handler's core tasting function as a first
 136        level filter to reject BFD's that don't have the right
 137        flavour. */
 138
 139     enum bfd_flavour core_flavour;
 140
 141     /* Core file handler function to call to recognize corefile
 142        formats that BFD rejects.  Some core file format just don't fit
 143        into the BFD model, or may require other resources to identify
 144        them, that simply aren't available to BFD (such as symbols from
 145        another file).  Returns nonzero if the handler recognizes the
 146        format, zero otherwise. */
 147
 148     int (*check_format) (bfd *);
 149
 150     /* Core file handler function to call to ask if it can handle a
 151        given core file format or not.  Returns zero if it can't,
 152        nonzero otherwise. */
 153
 154     int (*core_sniffer) (struct core_fns *, bfd *);
 155
 156     /* Extract the register values out of the core file and supply them
 157        into REGCACHE.
 158
 159        CORE_REG_SECT points to the register values themselves, read into
 160        memory.
 161
 162        CORE_REG_SIZE is the size of that area.
 163
 164        WHICH says which set of registers we are handling:
 165          0 --- integer registers
 166          2 --- floating-point registers, on machines where they are
 167                discontiguous
 168          3 --- extended floating-point registers, on machines where
 169                these are present in yet a third area.  (GNU/Linux uses
 170                this to get at the SSE registers.)
 171
 172        REG_ADDR is the offset from u.u_ar0 to the register values relative to
 173        core_reg_sect.  This is used with old-fashioned core files to locate the
 174        registers in a large upage-plus-stack ".reg" section.  Original upage
 175        address X is at location core_reg_sect+x+reg_addr. */
 176
 177     void (*core_read_registers) (struct regcache *regcache,
 178                                  char *core_reg_sect,
 179                                  unsigned core_reg_size,
 180                                  int which, CORE_ADDR reg_addr);
 181
 182     /* Finds the next struct core_fns.  They are allocated and
 183        initialized in whatever module implements the functions pointed
 184        to; an initializer calls deprecated_add_core_fns to add them to
 185        the global chain.  */
 186
 187     struct core_fns *next;
 188
 189   };
 190
 191 /* NOTE: cagney/2004-04-05: Replaced by "regset.h" and
 192    regset_from_core_section().  */
 193 extern void deprecated_add_core_fns (struct core_fns *cf);
 194 extern int default_core_sniffer (struct core_fns *cf, bfd * abfd);
 195 extern int default_check_format (bfd * abfd);
 196
 197 struct target_section *deprecated_core_resize_section_table (int num_added);
 198
 199 #endif /* !defined (GDBCORE_H) */