gdb/gdbserver/mem-break.h

   1 /* Memory breakpoint interfaces for the remote server for GDB.
   2    Copyright (C) 2002-2016 Free Software Foundation, Inc.
   3
   4    Contributed by MontaVista Software.
   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 3 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, see <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef MEM_BREAK_H
  22 #define MEM_BREAK_H
  23
  24 #include "break-common.h"
  25
  26 /* Breakpoints are opaque.  */
  27 struct breakpoint;
  28 struct gdb_breakpoint;
  29 struct fast_tracepoint_jump;
  30 struct raw_breakpoint;
  31 struct process_info;
  32
  33 #define Z_PACKET_SW_BP '0'
  34 #define Z_PACKET_HW_BP '1'
  35 #define Z_PACKET_WRITE_WP '2'
  36 #define Z_PACKET_READ_WP '3'
  37 #define Z_PACKET_ACCESS_WP '4'
  38
  39 /* The low level breakpoint types.  */
  40
  41 enum raw_bkpt_type
  42   {
  43     /* Software/memory breakpoint.  */
  44     raw_bkpt_type_sw,
  45
  46     /* Hardware-assisted breakpoint.  */
  47     raw_bkpt_type_hw,
  48
  49     /* Hardware-assisted write watchpoint.  */
  50     raw_bkpt_type_write_wp,
  51
  52     /* Hardware-assisted read watchpoint.  */
  53     raw_bkpt_type_read_wp,
  54
  55     /* Hardware-assisted access watchpoint.  */
  56     raw_bkpt_type_access_wp
  57   };
  58
  59 /* Map the protocol breakpoint/watchpoint type Z_TYPE to the internal
  60    raw breakpoint type.  */
  61
  62 enum raw_bkpt_type Z_packet_to_raw_bkpt_type (char z_type);
  63
  64 /* Map a raw breakpoint type to an enum target_hw_bp_type.  */
  65
  66 enum target_hw_bp_type raw_bkpt_type_to_target_hw_bp_type
  67   (enum raw_bkpt_type raw_type);
  68
  69 /* Create a new GDB breakpoint of type Z_TYPE at ADDR with kind KIND.
  70    Returns a pointer to the newly created breakpoint on success.  On
  71    failure returns NULL and sets *ERR to either -1 for error, or 1 if
  72    Z_TYPE breakpoints are not supported on this target.  */
  73
  74 struct gdb_breakpoint *set_gdb_breakpoint (char z_type, CORE_ADDR addr,
  75                                            int kind, int *err);
  76
  77 /* Delete a GDB breakpoint of type Z_TYPE and kind KIND previously
  78    inserted at ADDR with set_gdb_breakpoint_at.  Returns 0 on success,
  79    -1 on error, and 1 if Z_TYPE breakpoints are not supported on this
  80    target.  */
  81
  82 int delete_gdb_breakpoint (char z_type, CORE_ADDR addr, int kind);
  83
  84 /* Returns TRUE if there's a software or hardware (code) breakpoint at
  85    ADDR in our tables, inserted, or not.  */
  86
  87 int breakpoint_here (CORE_ADDR addr);
  88
  89 /* Returns TRUE if there's any inserted software or hardware (code)
  90    breakpoint set at ADDR.  */
  91
  92 int breakpoint_inserted_here (CORE_ADDR addr);
  93
  94 /* Returns TRUE if there's any inserted software breakpoint at
  95    ADDR.  */
  96
  97 int software_breakpoint_inserted_here (CORE_ADDR addr);
  98
  99 /* Returns TRUE if there's any inserted hardware (code) breakpoint at
 100    ADDR.  */
 101
 102 int hardware_breakpoint_inserted_here (CORE_ADDR addr);
 103
 104 /* Returns TRUE if there's any single-step breakpoint at ADDR.  */
 105
 106 int single_step_breakpoint_inserted_here (CORE_ADDR addr);
 107
 108 /* Clear all breakpoint conditions and commands associated with a
 109    breakpoint.  */
 110
 111 void clear_breakpoint_conditions_and_commands (struct gdb_breakpoint *bp);
 112
 113 /* Set target-side condition CONDITION to the breakpoint at ADDR.
 114    Returns false on failure.  On success, advances CONDITION pointer
 115    past the condition and returns true.  */
 116
 117 int add_breakpoint_condition (struct gdb_breakpoint *bp, char **condition);
 118
 119 /* Set target-side commands COMMANDS to the breakpoint at ADDR.
 120    Returns false on failure.  On success, advances COMMANDS past the
 121    commands and returns true.  If PERSIST, the commands should run
 122    even while GDB is disconnected.  */
 123
 124 int add_breakpoint_commands (struct gdb_breakpoint *bp, char **commands,
 125                              int persist);
 126
 127 int any_persistent_commands (void);
 128
 129 /* Evaluation condition (if any) at breakpoint BP.  Return 1 if
 130    true and 0 otherwise.  */
 131
 132 int gdb_condition_true_at_breakpoint (CORE_ADDR where);
 133
 134 int gdb_no_commands_at_breakpoint (CORE_ADDR where);
 135
 136 void run_breakpoint_commands (CORE_ADDR where);
 137
 138 /* Returns TRUE if there's a GDB breakpoint (Z0 or Z1) set at
 139    WHERE.  */
 140
 141 int gdb_breakpoint_here (CORE_ADDR where);
 142
 143 /* Create a new breakpoint at WHERE, and call HANDLER when
 144    it is hit.  HANDLER should return 1 if the breakpoint
 145    should be deleted, 0 otherwise.  The type of the created
 146    breakpoint is other_breakpoint.  */
 147
 148 struct breakpoint *set_breakpoint_at (CORE_ADDR where,
 149                                       int (*handler) (CORE_ADDR));
 150
 151 /* Delete a breakpoint.  */
 152
 153 int delete_breakpoint (struct breakpoint *bkpt);
 154
 155 /* Set a single-step breakpoint at STOP_AT for thread represented by
 156    PTID.  */
 157
 158 void set_single_step_breakpoint (CORE_ADDR stop_at, ptid_t ptid);
 159
 160 /* Delete all single-step breakpoints of THREAD.  */
 161
 162 void delete_single_step_breakpoints (struct thread_info *thread);
 163
 164 /* Reinsert all single-step breakpoints of THREAD.  */
 165
 166 void reinsert_single_step_breakpoints (struct thread_info *thread);
 167
 168 /* Uninsert all single-step breakpoints of THREAD.  This still leaves
 169    the single-step breakpoints in the table.  */
 170
 171 void uninsert_single_step_breakpoints (struct thread_info *thread);
 172
 173 /* Reinsert breakpoints at WHERE (and change their status to
 174    inserted).  */
 175
 176 void reinsert_breakpoints_at (CORE_ADDR where);
 177
 178 /* The THREAD has single-step breakpoints or not.  */
 179
 180 int has_single_step_breakpoints (struct thread_info *thread);
 181
 182 /* Uninsert breakpoints at WHERE (and change their status to
 183    uninserted).  This still leaves the breakpoints in the table.  */
 184
 185 void uninsert_breakpoints_at (CORE_ADDR where);
 186
 187 /* Reinsert all breakpoints of the current process (and change their
 188    status to inserted).  */
 189
 190 void reinsert_all_breakpoints (void);
 191
 192 /* Uninsert all breakpoints of the current process (and change their
 193    status to uninserted).  This still leaves the breakpoints in the
 194    table.  */
 195
 196 void uninsert_all_breakpoints (void);
 197
 198 /* See if any breakpoint claims ownership of STOP_PC.  Call the handler for
 199    the breakpoint, if found.  */
 200
 201 void check_breakpoints (CORE_ADDR stop_pc);
 202
 203 /* See if any breakpoints shadow the target memory area from MEM_ADDR
 204    to MEM_ADDR + MEM_LEN.  Update the data already read from the target
 205    (in BUF) if necessary.  */
 206
 207 void check_mem_read (CORE_ADDR mem_addr, unsigned char *buf, int mem_len);
 208
 209 /* See if any breakpoints shadow the target memory area from MEM_ADDR
 210    to MEM_ADDR + MEM_LEN.  Update the data to be written to the target
 211    (in BUF, a copy of MYADDR on entry) if necessary, as well as the
 212    original data for any breakpoints.  */
 213
 214 void check_mem_write (CORE_ADDR mem_addr,
 215                       unsigned char *buf, const unsigned char *myaddr, int mem_len);
 216
 217 /* Delete all breakpoints.  */
 218
 219 void delete_all_breakpoints (void);
 220
 221 /* Clear the "inserted" flag in all breakpoints of PROC.  */
 222
 223 void mark_breakpoints_out (struct process_info *proc);
 224
 225 /* Delete all breakpoints, but do not try to un-insert them from the
 226    inferior.  */
 227
 228 void free_all_breakpoints (struct process_info *proc);
 229
 230 /* Check if breakpoints still seem to be inserted in the inferior.  */
 231
 232 void validate_breakpoints (void);
 233
 234 /* Insert a fast tracepoint jump at WHERE, using instruction INSN, of
 235    LENGTH bytes.  */
 236
 237 struct fast_tracepoint_jump *set_fast_tracepoint_jump (CORE_ADDR where,
 238                                                        unsigned char *insn,
 239                                                        ULONGEST length);
 240
 241 /* Increment reference counter of JP.  */
 242 void inc_ref_fast_tracepoint_jump (struct fast_tracepoint_jump *jp);
 243
 244 /* Delete fast tracepoint jump TODEL from our tables, and uninsert if
 245    from memory.  */
 246
 247 int delete_fast_tracepoint_jump (struct fast_tracepoint_jump *todel);
 248
 249 /* Returns true if there's fast tracepoint jump set at WHERE.  */
 250
 251 int fast_tracepoint_jump_here (CORE_ADDR);
 252
 253 /* Uninsert fast tracepoint jumps at WHERE (and change their status to
 254    uninserted).  This still leaves the tracepoints in the table.  */
 255
 256 void uninsert_fast_tracepoint_jumps_at (CORE_ADDR pc);
 257
 258 /* Reinsert fast tracepoint jumps at WHERE (and change their status to
 259    inserted).  */
 260
 261 void reinsert_fast_tracepoint_jumps_at (CORE_ADDR where);
 262
 263 /* Insert a memory breakpoint.  */
 264
 265 int insert_memory_breakpoint (struct raw_breakpoint *bp);
 266
 267 /* Remove a previously inserted memory breakpoint.  */
 268
 269 int remove_memory_breakpoint (struct raw_breakpoint *bp);
 270
 271 /* Create a new breakpoint list in CHILD_THREAD's process that is a
 272    copy of breakpoint list in PARENT_THREAD's process.  */
 273
 274 void clone_all_breakpoints (struct thread_info *child_thread,
 275                             const struct thread_info *parent_thread);
 276
 277 #endif /* MEM_BREAK_H */