gdb/gdbcore.h

   1 /* Machine independent variables that describe the core file under GDB.
   2    Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
   3    1997, 1998, 1999, 2000, 2001 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 2 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, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 /* Interface routines for core, executable, etc.  */
  23
  24 #if !defined (GDBCORE_H)
  25 #define GDBCORE_H 1
  26
  27 #include "bfd.h"
  28
  29 /* Return the name of the executable file as a string.
  30    ERR nonzero means get error if there is none specified;
  31    otherwise return 0 in that case.  */
  32
  33 extern char *get_exec_file (int err);
  34
  35 /* Nonzero if there is a core file.  */
  36
  37 extern int have_core_file_p (void);
  38
  39 /* Read "memory data" from whatever target or inferior we have.
  40    Returns zero if successful, errno value if not.  EIO is used for
  41    address out of bounds.  If breakpoints are inserted, returns shadow
  42    contents, not the breakpoints themselves.  From breakpoint.c.  */
  43
  44 extern int read_memory_nobpt (CORE_ADDR memaddr, char *myaddr, unsigned len);
  45
  46 /* Report a memory error with error().  */
  47
  48 extern void memory_error (int status, CORE_ADDR memaddr);
  49
  50 /* Like target_read_memory, but report an error if can't read.  */
  51
  52 extern void read_memory (CORE_ADDR memaddr, char *myaddr, int len);
  53
  54 /* Read an integer from debugged memory, given address and number of
  55    bytes.  */
  56
  57 extern LONGEST read_memory_integer (CORE_ADDR memaddr, int len);
  58 extern int safe_read_memory_integer (CORE_ADDR memaddr, int len, LONGEST *return_value);
  59
  60 /* Read an unsigned integer from debugged memory, given address and
  61    number of bytes.  */
  62
  63 extern ULONGEST read_memory_unsigned_integer (CORE_ADDR memaddr, int len);
  64
  65 /* Read a null-terminated string from the debuggee's memory, given address,
  66  * a buffer into which to place the string, and the maximum available space */
  67
  68 extern void read_memory_string (CORE_ADDR, char *, int);
  69
  70 /* Read the pointer of type TYPE at ADDR, and return the address it
  71    represents. */
  72
  73 CORE_ADDR
  74 read_memory_typed_address (CORE_ADDR addr, struct type *type);
  75
  76 /* This takes a char *, not void *.  This is probably right, because
  77    passing in an int * or whatever is wrong with respect to
  78    byteswapping, alignment, different sizes for host vs. target types,
  79    etc.  */
  80
  81 extern void write_memory (CORE_ADDR memaddr, char *myaddr, int len);
  82
  83 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
  84 extern void write_memory_unsigned_integer (CORE_ADDR addr, int len,
  85                                            ULONGEST value);
  86
  87 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer.  */
  88 extern void write_memory_signed_integer (CORE_ADDR addr, int len,
  89                                          LONGEST value);
  90
  91 extern void generic_search (int len, char *data, char *mask,
  92                             CORE_ADDR startaddr, int increment,
  93                             CORE_ADDR lorange, CORE_ADDR hirange,
  94                             CORE_ADDR * addr_found, char *data_found);
  95 \f
  96 /* Hook for `exec_file_command' command to call.  */
  97
  98 extern void (*exec_file_display_hook) (char *filename);
  99
 100 /* Hook for "file_command", which is more useful than above
 101    (because it is invoked AFTER symbols are read, not before) */
 102
 103 extern void (*file_changed_hook) (char *filename);
 104
 105 extern void specify_exec_file_hook (void (*hook) (char *filename));
 106
 107 /* Binary File Diddlers for the exec and core files */
 108
 109 extern bfd *core_bfd;
 110 extern bfd *exec_bfd;
 111
 112 /* Whether to open exec and core files read-only or read-write.  */
 113
 114 extern int write_files;
 115
 116 extern void core_file_command (char *filename, int from_tty);
 117
 118 extern void exec_open (char *filename, int from_tty);
 119
 120 extern void exec_file_attach (char *filename, int from_tty);
 121
 122 extern void exec_file_clear (int from_tty);
 123
 124 extern void validate_files (void);
 125
 126 extern CORE_ADDR register_addr (int regno, CORE_ADDR blockend);
 127
 128 #if !defined (KERNEL_U_ADDR)
 129 extern CORE_ADDR kernel_u_addr;
 130 #define KERNEL_U_ADDR kernel_u_addr
 131 #endif
 132
 133 /* The target vector for core files. */
 134
 135 extern struct target_ops core_ops;
 136
 137 /* The current default bfd target.  */
 138
 139 extern char *gnutarget;
 140
 141 extern void set_gnutarget (char *);
 142
 143 /* Structure to keep track of core register reading functions for
 144    various core file types.  */
 145
 146 struct core_fns
 147   {
 148
 149     /* BFD flavour that a core file handler is prepared to read.  This
 150        can be used by the handler's core tasting function as a first
 151        level filter to reject BFD's that don't have the right
 152        flavour. */
 153
 154     enum bfd_flavour core_flavour;
 155
 156     /* Core file handler function to call to recognize corefile
 157        formats that BFD rejects.  Some core file format just don't fit
 158        into the BFD model, or may require other resources to identify
 159        them, that simply aren't available to BFD (such as symbols from
 160        another file).  Returns nonzero if the handler recognizes the
 161        format, zero otherwise. */
 162
 163     int (*check_format) (bfd *);
 164
 165     /* Core file handler function to call to ask if it can handle a
 166        given core file format or not.  Returns zero if it can't,
 167        nonzero otherwise. */
 168
 169     int (*core_sniffer) (struct core_fns *, bfd *);
 170
 171     /* Extract the register values out of the core file and store them where
 172        `read_register' will find them.
 173
 174        CORE_REG_SECT points to the register values themselves, read into
 175        memory.
 176
 177        CORE_REG_SIZE is the size of that area.
 178
 179        WHICH says which set of registers we are handling:
 180          0 --- integer registers
 181          2 --- floating-point registers, on machines where they are
 182                discontiguous
 183          3 --- extended floating-point registers, on machines where
 184                these are present in yet a third area.  (GNU/Linux uses
 185                this to get at the SSE registers.)
 186
 187        REG_ADDR is the offset from u.u_ar0 to the register values relative to
 188        core_reg_sect.  This is used with old-fashioned core files to locate the
 189        registers in a large upage-plus-stack ".reg" section.  Original upage
 190        address X is at location core_reg_sect+x+reg_addr. */
 191
 192     void (*core_read_registers) (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 initialized
 197        in whatever module implements the functions pointed to; an
 198        initializer calls add_core_fns to add them to the global chain.  */
 199
 200     struct core_fns *next;
 201
 202   };
 203
 204 extern void 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 #endif /* !defined (GDBCORE_H) */