1 /* Machine independent variables that describe the core file under GDB. 2 3 Copyright (C) 1986-2016 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_status 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_status 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 /* Like target_read_code, but report an error if can't read. */ 61 62 extern void read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len); 63 64 /* Read an integer from debugged memory, given address and number of 65 bytes. */ 66 67 extern LONGEST read_memory_integer (CORE_ADDR memaddr, 68 int len, enum bfd_endian byte_order); 69 extern int safe_read_memory_integer (CORE_ADDR memaddr, int len, 70 enum bfd_endian byte_order, 71 LONGEST *return_value); 72 73 /* Read an unsigned integer from debugged memory, given address and 74 number of bytes. */ 75 76 extern ULONGEST read_memory_unsigned_integer (CORE_ADDR memaddr, 77 int len, 78 enum bfd_endian byte_order); 79 extern int safe_read_memory_unsigned_integer (CORE_ADDR memaddr, int len, 80 enum bfd_endian byte_order, 81 ULONGEST *return_value); 82 83 /* Read an integer from debugged code memory, given address, 84 number of bytes, and byte order for code. */ 85 86 extern LONGEST read_code_integer (CORE_ADDR memaddr, int len, 87 enum bfd_endian byte_order); 88 89 /* Read an unsigned integer from debugged code memory, given address, 90 number of bytes, and byte order for code. */ 91 92 extern ULONGEST read_code_unsigned_integer (CORE_ADDR memaddr, 93 int len, 94 enum bfd_endian byte_order); 95 96 /* Read a null-terminated string from the debuggee's memory, given 97 address, a buffer into which to place the string, and the maximum 98 available space. */ 99 100 extern void read_memory_string (CORE_ADDR, char *, int); 101 102 /* Read the pointer of type TYPE at ADDR, and return the address it 103 represents. */ 104 105 CORE_ADDR read_memory_typed_address (CORE_ADDR addr, struct type *type); 106 107 /* Same as target_write_memory, but report an error if can't 108 write. */ 109 110 extern void write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, 111 ssize_t len); 112 113 /* Same as write_memory, but notify 'memory_changed' observers. */ 114 115 extern void write_memory_with_notification (CORE_ADDR memaddr, 116 const bfd_byte *myaddr, 117 ssize_t len); 118 119 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer. */ 120 extern void write_memory_unsigned_integer (CORE_ADDR addr, int len, 121 enum bfd_endian byte_order, 122 ULONGEST value); 123 124 /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer. */ 125 extern void write_memory_signed_integer (CORE_ADDR addr, int len, 126 enum bfd_endian byte_order, 127 LONGEST value); 128 129 /* Hook for `exec_file_command' command to call. */ 130 131 extern void (*deprecated_exec_file_display_hook) (const char *filename); 132 133 /* Hook for "file_command", which is more useful than above 134 (because it is invoked AFTER symbols are read, not before). */ 135 136 extern void (*deprecated_file_changed_hook) (char *filename); 137 138 extern void specify_exec_file_hook (void (*hook) (const char *filename)); 139 140 /* Binary File Diddler for the core file. */ 141 142 extern bfd *core_bfd; 143 144 extern struct target_ops *core_target; 145 146 /* Whether to open exec and core files read-only or read-write. */ 147 148 extern int write_files; 149 150 extern void core_file_command (char *filename, int from_tty); 151 152 extern void exec_file_attach (const char *filename, int from_tty); 153 154 /* If the filename of the main executable is unknown, attempt to 155 determine it. If a filename is determined, proceed as though 156 it was just specified with the "file" command. Do nothing if 157 the filename of the main executable is already known. 158 DEFER_BP_RESET uses SYMFILE_DEFER_BP_RESET for the main symbol file. */ 159 160 extern void exec_file_locate_attach (int pid, int defer_bp_reset, int from_tty); 161 162 extern void exec_file_clear (int from_tty); 163 164 extern void validate_files (void); 165 166 /* The current default bfd target. */ 167 168 extern char *gnutarget; 169 170 extern void set_gnutarget (char *); 171 172 /* Structure to keep track of core register reading functions for 173 various core file types. */ 174 175 struct core_fns 176 { 177 178 /* BFD flavour that a core file handler is prepared to read. This 179 can be used by the handler's core tasting function as a first 180 level filter to reject BFD's that don't have the right 181 flavour. */ 182 183 enum bfd_flavour core_flavour; 184 185 /* Core file handler function to call to recognize corefile 186 formats that BFD rejects. Some core file format just don't fit 187 into the BFD model, or may require other resources to identify 188 them, that simply aren't available to BFD (such as symbols from 189 another file). Returns nonzero if the handler recognizes the 190 format, zero otherwise. */ 191 192 int (*check_format) (bfd *); 193 194 /* Core file handler function to call to ask if it can handle a 195 given core file format or not. Returns zero if it can't, 196 nonzero otherwise. */ 197 198 int (*core_sniffer) (struct core_fns *, bfd *); 199 200 /* Extract the register values out of the core file and supply them 201 into REGCACHE. 202 203 CORE_REG_SECT points to the register values themselves, read into 204 memory. 205 206 CORE_REG_SIZE is the size of that area. 207 208 WHICH says which set of registers we are handling: 209 0 --- integer registers 210 2 --- floating-point registers, on machines where they are 211 discontiguous 212 3 --- extended floating-point registers, on machines where 213 these are present in yet a third area. (GNU/Linux uses 214 this to get at the SSE registers.) 215 216 REG_ADDR is the offset from u.u_ar0 to the register values relative to 217 core_reg_sect. This is used with old-fashioned core files to locate the 218 registers in a large upage-plus-stack ".reg" section. Original upage 219 address X is at location core_reg_sect+x+reg_addr. */ 220 221 void (*core_read_registers) (struct regcache *regcache, 222 char *core_reg_sect, 223 unsigned core_reg_size, 224 int which, CORE_ADDR reg_addr); 225 226 /* Finds the next struct core_fns. They are allocated and 227 initialized in whatever module implements the functions pointed 228 to; an initializer calls deprecated_add_core_fns to add them to 229 the global chain. */ 230 231 struct core_fns *next; 232 233 }; 234 235 /* NOTE: cagney/2004-04-05: Replaced by "regset.h" and 236 regset_from_core_section(). */ 237 extern void deprecated_add_core_fns (struct core_fns *cf); 238 extern int default_core_sniffer (struct core_fns *cf, bfd * abfd); 239 extern int default_check_format (bfd * abfd); 240 241 #endif /* !defined (GDBCORE_H) */ 242