gdbserver/mem-break.h

   1 /* Memory breakpoint interfaces for the remote server for GDB.
   2    Copyright (C) 2002-2021 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 GDBSERVER_MEM_BREAK_H
  22 #define GDBSERVER_MEM_BREAK_H
  23
  24 #include "gdbsupport/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,
 118                               const char **condition);
 119
 120 /* Set target-side commands COMMANDS to the breakpoint at ADDR.
 121    Returns false on failure.  On success, advances COMMANDS past the
 122    commands and returns true.  If PERSIST, the commands should run
 123    even while GDB is disconnected.  */
 124
 125 int add_breakpoint_commands (struct gdb_breakpoint *bp, const char **commands,
 126                              int persist);
 127
 128 /* Return true if PROC has any persistent command.  */
 129 bool any_persistent_commands (process_info *proc);
 130
 131 /* Evaluation condition (if any) at breakpoint BP.  Return 1 if
 132    true and 0 otherwise.  */
 133
 134 int gdb_condition_true_at_breakpoint (CORE_ADDR where);
 135
 136 int gdb_no_commands_at_breakpoint (CORE_ADDR where);
 137
 138 void run_breakpoint_commands (CORE_ADDR where);
 139
 140 /* Returns TRUE if there's a GDB breakpoint (Z0 or Z1) set at
 141    WHERE.  */
 142
 143 int gdb_breakpoint_here (CORE_ADDR where);
 144
 145 /* Create a new breakpoint at WHERE, and call HANDLER when
 146    it is hit.  HANDLER should return 1 if the breakpoint
 147    should be deleted, 0 otherwise.  The type of the created
 148    breakpoint is other_breakpoint.  */
 149
 150 struct breakpoint *set_breakpoint_at (CORE_ADDR where,
 151                                       int (*handler) (CORE_ADDR));
 152
 153 /* Delete a breakpoint.  */
 154
 155 int delete_breakpoint (struct breakpoint *bkpt);
 156
 157 /* Set a single-step breakpoint at STOP_AT for thread represented by
 158    PTID.  */
 159
 160 void set_single_step_breakpoint (CORE_ADDR stop_at, ptid_t ptid);
 161
 162 /* Delete all single-step breakpoints of THREAD.  */
 163
 164 void delete_single_step_breakpoints (struct thread_info *thread);
 165
 166 /* Reinsert all single-step breakpoints of THREAD.  */
 167
 168 void reinsert_single_step_breakpoints (struct thread_info *thread);
 169
 170 /* Uninsert all single-step breakpoints of THREAD.  This still leaves
 171    the single-step breakpoints in the table.  */
 172
 173 void uninsert_single_step_breakpoints (struct thread_info *thread);
 174
 175 /* Reinsert breakpoints at WHERE (and change their status to
 176    inserted).  */
 177
 178 void reinsert_breakpoints_at (CORE_ADDR where);
 179
 180 /* The THREAD has single-step breakpoints or not.  */
 181
 182 int has_single_step_breakpoints (struct thread_info *thread);
 183
 184 /* Uninsert breakpoints at WHERE (and change their status to
 185    uninserted).  This still leaves the breakpoints in the table.  */
 186
 187 void uninsert_breakpoints_at (CORE_ADDR where);
 188
 189 /* Reinsert all breakpoints of the current process (and change their
 190    status to inserted).  */
 191
 192 void reinsert_all_breakpoints (void);
 193
 194 /* Uninsert all breakpoints of the current process (and change their
 195    status to uninserted).  This still leaves the breakpoints in the
 196    table.  */
 197
 198 void uninsert_all_breakpoints (void);
 199
 200 /* See if any breakpoint claims ownership of STOP_PC.  Call the handler for
 201    the breakpoint, if found.  */
 202
 203 void check_breakpoints (CORE_ADDR stop_pc);
 204
 205 /* See if any breakpoints shadow the target memory area from MEM_ADDR
 206    to MEM_ADDR + MEM_LEN.  Update the data already read from the target
 207    (in BUF) if necessary.  */
 208
 209 void check_mem_read (CORE_ADDR mem_addr, unsigned char *buf, int mem_len);
 210
 211 /* See if any breakpoints shadow the target memory area from MEM_ADDR
 212    to MEM_ADDR + MEM_LEN.  Update the data to be written to the target
 213    (in BUF, a copy of MYADDR on entry) if necessary, as well as the
 214    original data for any breakpoints.  */
 215
 216 void check_mem_write (CORE_ADDR mem_addr,
 217                       unsigned char *buf, const unsigned char *myaddr, int mem_len);
 218
 219 /* Delete all breakpoints.  */
 220
 221 void delete_all_breakpoints (void);
 222
 223 /* Clear the "inserted" flag in all breakpoints of PROC.  */
 224
 225 void mark_breakpoints_out (struct process_info *proc);
 226
 227 /* Delete all breakpoints, but do not try to un-insert them from the
 228    inferior.  */
 229
 230 void free_all_breakpoints (struct process_info *proc);
 231
 232 /* Check if breakpoints still seem to be inserted in the inferior.  */
 233
 234 void validate_breakpoints (void);
 235
 236 /* Insert a fast tracepoint jump at WHERE, using instruction INSN, of
 237    LENGTH bytes.  */
 238
 239 struct fast_tracepoint_jump *set_fast_tracepoint_jump (CORE_ADDR where,
 240                                                        unsigned char *insn,
 241                                                        ULONGEST length);
 242
 243 /* Increment reference counter of JP.  */
 244 void inc_ref_fast_tracepoint_jump (struct fast_tracepoint_jump *jp);
 245
 246 /* Delete fast tracepoint jump TODEL from our tables, and uninsert if
 247    from memory.  */
 248
 249 int delete_fast_tracepoint_jump (struct fast_tracepoint_jump *todel);
 250
 251 /* Returns true if there's fast tracepoint jump set at WHERE.  */
 252
 253 int fast_tracepoint_jump_here (CORE_ADDR);
 254
 255 /* Uninsert fast tracepoint jumps at WHERE (and change their status to
 256    uninserted).  This still leaves the tracepoints in the table.  */
 257
 258 void uninsert_fast_tracepoint_jumps_at (CORE_ADDR pc);
 259
 260 /* Reinsert fast tracepoint jumps at WHERE (and change their status to
 261    inserted).  */
 262
 263 void reinsert_fast_tracepoint_jumps_at (CORE_ADDR where);
 264
 265 /* Insert a memory breakpoint.  */
 266
 267 int insert_memory_breakpoint (struct raw_breakpoint *bp);
 268
 269 /* Remove a previously inserted memory breakpoint.  */
 270
 271 int remove_memory_breakpoint (struct raw_breakpoint *bp);
 272
 273 /* Create a new breakpoint list in CHILD_THREAD's process that is a
 274    copy of breakpoint list in PARENT_THREAD's process.  */
 275
 276 void clone_all_breakpoints (struct thread_info *child_thread,
 277                             const struct thread_info *parent_thread);
 278
 279 #endif /* GDBSERVER_MEM_BREAK_H */