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 Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21    Boston, MA 02110-1301, USA.  */
  22
  23 /* Interface routines for core, executable, etc.  */
  24
  25 #if !defined (GDBCORE_H)
  26 #define GDBCORE_H 1
  27
  28 struct type;
  29 struct regcache;
  30
  31 #include "bfd.h"
  32
  33 /* Return the name of the executable file as a string.
  34    ERR nonzero means get error if there is none specified;
  35    otherwise return 0 in that case.  */
  36
  37 extern char *get_exec_file (int err);
  38
  39 /* Nonzero if there is a core file.  */
  40
  41 extern int have_core_file_p (void);
  42
  43 /* Read "memory data" from whatever target or inferior we have.
  44    Returns zero if successful, errno value if not.  EIO is used for
  45    address out of bounds.  If breakpoints are inserted, returns shadow
  46    contents, not the breakpoints themselves.  From breakpoint.c.  */
  47
  48 /* NOTE: cagney/2004-06-10: Code reading from a live inferior can use
  49    the get_frame_memory methods, code reading from an exec can use the
  50    target methods.  */
  51
  52 extern int read_memory_nobpt (CORE_ADDR memaddr, gdb_byte *myaddr,
  53                               unsigned len);
  54
  55 /* Report a memory error with error().  */
  56
  57 extern void memory_error (int status, CORE_ADDR memaddr);
  58
  59 /* Like target_read_memory, but report an error if can't read.  */
  60
  61 extern void read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len);
  62
  63 /* Read an integer from debugged memory, given address and number of
  64    bytes.  */
  65
  66 extern LONGEST read_memory_integer (CORE_ADDR memaddr, int len);
  67 extern int safe_read_memory_integer (CORE_ADDR memaddr, int len, 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, int len);
  73
  74 /* Read a null-terminated string from the debuggee's memory, given address,
  75  * a buffer into which to place the string, and the maximum available space */
  76
  77 extern void read_memory_string (CORE_ADDR, char *, int);
  78
  79 /* Read the pointer of type TYPE at ADDR, and return the address it
  80    represents. */
  81
  82 CORE_ADDR read_memory_typed_address (CORE_ADDR addr, struct type *type);
  83
  84 /* This takes a char *, not void *.  This is probably right, because
  85    passing in an int * or whatever is wrong with respect to
  86    byteswapping, alignment, different sizes for host vs. target types,
  87    etc.  */
  88
  89 extern void write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, int len);
  90
  91 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
  92 extern void write_memory_unsigned_integer (CORE_ADDR addr, int len,
  93                                            ULONGEST value);
  94
  95 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
  96 extern void write_memory_signed_integer (CORE_ADDR addr, int len,
  97                                          LONGEST value);
  98
  99 extern void generic_search (int len, char *data, char *mask,
 100                             CORE_ADDR startaddr, int increment,
 101                             CORE_ADDR lorange, CORE_ADDR hirange,
 102                             CORE_ADDR * addr_found, char *data_found);
 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 Diddlers for the exec and core files.  */
 116
 117 extern bfd *core_bfd;
 118 extern bfd *exec_bfd;
 119
 120 /* Whether to open exec and core files read-only or read-write.  */
 121
 122 extern int write_files;
 123
 124 extern void core_file_command (char *filename, int from_tty);
 125
 126 extern void exec_file_attach (char *filename, int from_tty);
 127
 128 extern void exec_file_clear (int from_tty);
 129
 130 extern void validate_files (void);
 131
 132 /* The target vector for core files. */
 133
 134 extern struct target_ops core_ops;
 135
 136 /* The current default bfd target.  */
 137
 138 extern char *gnutarget;
 139
 140 extern void set_gnutarget (char *);
 141
 142 /* Structure to keep track of core register reading functions for
 143    various core file types.  */
 144
 145 struct core_fns
 146   {
 147
 148     /* BFD flavour that a core file handler is prepared to read.  This
 149        can be used by the handler's core tasting function as a first
 150        level filter to reject BFD's that don't have the right
 151        flavour. */
 152
 153     enum bfd_flavour core_flavour;
 154
 155     /* Core file handler function to call to recognize corefile
 156        formats that BFD rejects.  Some core file format just don't fit
 157        into the BFD model, or may require other resources to identify
 158        them, that simply aren't available to BFD (such as symbols from
 159        another file).  Returns nonzero if the handler recognizes the
 160        format, zero otherwise. */
 161
 162     int (*check_format) (bfd *);
 163
 164     /* Core file handler function to call to ask if it can handle a
 165        given core file format or not.  Returns zero if it can't,
 166        nonzero otherwise. */
 167
 168     int (*core_sniffer) (struct core_fns *, bfd *);
 169
 170     /* Extract the register values out of the core file and supply them
 171        into REGCACHE.
 172
 173        CORE_REG_SECT points to the register values themselves, read into
 174        memory.
 175
 176        CORE_REG_SIZE is the size of that area.
 177
 178        WHICH says which set of registers we are handling:
 179          0 --- integer registers
 180          2 --- floating-point registers, on machines where they are
 181                discontiguous
 182          3 --- extended floating-point registers, on machines where
 183                these are present in yet a third area.  (GNU/Linux uses
 184                this to get at the SSE registers.)
 185
 186        REG_ADDR is the offset from u.u_ar0 to the register values relative to
 187        core_reg_sect.  This is used with old-fashioned core files to locate the
 188        registers in a large upage-plus-stack ".reg" section.  Original upage
 189        address X is at location core_reg_sect+x+reg_addr. */
 190
 191     void (*core_read_registers) (struct regcache *regcache,
 192                                  char *core_reg_sect,
 193                                  unsigned core_reg_size,
 194                                  int which, CORE_ADDR reg_addr);
 195
 196     /* Finds the next struct core_fns.  They are allocated and
 197        initialized in whatever module implements the functions pointed
 198        to; an initializer calls deprecated_add_core_fns to add them to
 199        the global chain.  */
 200
 201     struct core_fns *next;
 202
 203   };
 204
 205 /* NOTE: cagney/2004-04-05: Replaced by "regset.h" and
 206    regset_from_core_section().  */
 207 extern void deprecated_add_core_fns (struct core_fns *cf);
 208 extern int default_core_sniffer (struct core_fns *cf, bfd * abfd);
 209 extern int default_check_format (bfd * abfd);
 210
 211 #endif /* !defined (GDBCORE_H) */