gdb/monitor.h

   1 /* Definitions for remote debugging interface for ROM monitors.
   2    Copyright (C) 1990-1992, 1994-2000, 2007-2012 Free Software
   3    Foundation, Inc.
   4    Contributed by Cygnus Support. Written by Rob Savoye for Cygnus.
   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 MONITOR_H
  22 #define MONITOR_H
  23
  24 struct target_waitstatus;
  25 struct serial;
  26
  27 /* This structure describes the strings necessary to give small command
  28    sequences to the monitor, and parse the response.
  29
  30    CMD is the actual command typed at the monitor.  Usually this has
  31    embedded sequences ala printf, which are substituted with the
  32    arguments appropriate to that type of command.  Ie: to examine a
  33    register, we substitute the register name for the first arg.  To
  34    modify memory, we substitute the memory location and the new
  35    contents for the first and second args, etc...
  36
  37    RESP_DELIM used to home in on the response string, and is used to
  38    disambiguate the answer within the pile of text returned by the
  39    monitor.  This should be a unique string that immediately precedes
  40    the answer.  Ie: if your monitor prints out `PC: 00000001= ' in
  41    response to asking for the PC, you should use `: ' as the
  42    RESP_DELIM.  RESP_DELIM may be NULL if the res- ponse is going to
  43    be ignored, or has no particular leading text.
  44
  45    TERM is the string that the monitor outputs to indicate that it is
  46    idle, and waiting for input.  This is usually a prompt of some
  47    sort.  In the previous example, it would be `= '.  It is important
  48    that TERM really means that the monitor is idle, otherwise GDB may
  49    try to type at it when it isn't ready for input.  This is a problem
  50    because many monitors cannot deal with type-ahead.  TERM may be
  51    NULL if the normal prompt is output.
  52
  53    TERM_CMD is used to quit out of the subcommand mode and get back to
  54    the main prompt.  TERM_CMD may be NULL if it isn't necessary.  It
  55    will also be ignored if TERM is NULL.  */
  56
  57 struct memrw_cmd
  58   {
  59     char *cmdb;                 /* Command to send for byte read/write */
  60     char *cmdw;                 /* Command for word (16 bit) read/write */
  61     char *cmdl;                 /* Command for long (32 bit) read/write */
  62     char *cmdll;                /* Command for long long (64 bit) read/write */
  63     char *resp_delim;           /* String just prior to the desired value */
  64     char *term;                 /* Terminating string to search for */
  65     char *term_cmd;             /* String to get out of sub-mode (if
  66                                    necessary) */
  67   };
  68
  69 struct regrw_cmd
  70   {
  71     char *cmd;                  /* Command to send for reg read/write */
  72     char *resp_delim;           /* String (actually a regexp if getmem) just
  73                                    prior to the desired value */
  74     char *term;                 /* Terminating string to search for */
  75     char *term_cmd;             /* String to get out of sub-mode (if
  76                                    necessary) */
  77   };
  78
  79 struct monitor_ops
  80   {
  81     int flags;                  /* See below */
  82     char **init;                /* List of init commands.  NULL terminated.  */
  83     char *cont;                 /* continue command */
  84     char *step;                 /* single step */
  85     char *stop;                 /* Interrupt program string */
  86     char *set_break;            /* set a breakpoint.  If NULL, monitor
  87                                    implementation sets its own
  88                                    to_insert_breakpoint method.  */
  89     char *clr_break;            /* clear a breakpoint */
  90     char *clr_all_break;        /* Clear all breakpoints */
  91     char *fill;                 /* Memory fill cmd (addr len val) */
  92     struct memrw_cmd setmem;    /* set memory to a value */
  93     struct memrw_cmd getmem;    /* display memory */
  94     struct regrw_cmd setreg;    /* set a register */
  95     struct regrw_cmd getreg;    /* get a register */
  96     /* Some commands can dump a bunch of registers
  97        at once.  This comes as a set of REG=VAL
  98        pairs.  This should be called for each pair
  99        of registers that we can parse to supply
 100        GDB with the value of a register.  */
 101     char *dump_registers;       /* Command to dump all regs at once */
 102     char *register_pattern;     /* Pattern that picks out register
 103                                    from reg dump */
 104     void (*supply_register) (struct regcache *regcache, char *name,
 105                              int namelen, char *val, int vallen);
 106     void (*load_routine) (struct serial *desc, char *file,
 107                           int hashmark);        /* Download routine */
 108     int (*dumpregs) (struct regcache *);        /* Dump all registers */
 109     int (*continue_hook) (void);        /* Emit the continue command */
 110     int (*wait_filter) (char *buf,      /* Maybe contains registers */
 111                         int bufmax,
 112                         int *response_length,
 113                         struct target_waitstatus * status);
 114     char *load;                 /* load command */
 115     char *loadresp;             /* Response to load command */
 116     char *prompt;               /* monitor command prompt */
 117     char *line_term;            /* end-of-command delimitor */
 118     char *cmd_end;              /* optional command terminator */
 119     struct target_ops *target;  /* target operations */
 120     int stopbits;               /* number of stop bits */
 121     char **regnames;            /* array of register names in ascii */
 122                                 /* deprecated: use regname instead */
 123     const char *(*regname) (int index);
 124                                 /* function for dynamic regname array */
 125     int num_breakpoints;        /* If set_break != NULL, number of supported
 126                                    breakpoints */
 127     int magic;                  /* Check value */
 128   };
 129
 130 /* The monitor ops magic number, used to detect if an ops structure doesn't
 131    have the right number of entries filled in.  */
 132
 133 #define MONITOR_OPS_MAGIC 600925
 134
 135 /* Flag definitions.  */
 136
 137 /* If set, then clear breakpoint command uses address, otherwise it
 138    uses an index returned by the monitor.  */
 139
 140 #define MO_CLR_BREAK_USES_ADDR 0x1
 141
 142 /* If set, then memory fill command uses STARTADDR, ENDADDR+1, VALUE
 143    as args, else it uses STARTADDR, LENGTH, VALUE as args.  */
 144
 145 #define MO_FILL_USES_ADDR 0x2
 146
 147 /* If set, then monitor doesn't automatically supply register dump
 148    when coming back after a continue.  */
 149
 150 #define MO_NEED_REGDUMP_AFTER_CONT 0x4
 151
 152 /* getmem needs start addr and end addr.  */
 153
 154 #define MO_GETMEM_NEEDS_RANGE 0x8
 155
 156 /* getmem can only read one loc at a time.  */
 157
 158 #define MO_GETMEM_READ_SINGLE 0x10
 159
 160 /* handle \r\n combinations.  */
 161
 162 #define MO_HANDLE_NL 0x20
 163
 164 /* don't expect echos in monitor_open.  */
 165
 166 #define MO_NO_ECHO_ON_OPEN 0x40
 167
 168 /* If set, send break to stop monitor.  */
 169
 170 #define MO_SEND_BREAK_ON_STOP 0x80
 171
 172 /* If set, target sends an ACK after each S-record.  */
 173
 174 #define MO_SREC_ACK 0x100
 175
 176 /* Allow 0x prefix on addresses retured from monitor.  */
 177
 178 #define MO_HEX_PREFIX 0x200
 179
 180 /* Some monitors require a different command when starting a program.  */
 181
 182 #define MO_RUN_FIRST_TIME 0x400
 183
 184 /* Don't expect echos when getting memory */
 185
 186 #define MO_NO_ECHO_ON_SETMEM 0x800
 187
 188 /* If set, then register store command expects value BEFORE regname.  */
 189
 190 #define MO_REGISTER_VALUE_FIRST 0x1000
 191
 192 /* If set, then the monitor displays registers as pairs.  */
 193
 194 #define MO_32_REGS_PAIRED 0x2000
 195
 196 /* If set, then register setting happens interactively.  */
 197
 198 #define MO_SETREG_INTERACTIVE 0x4000
 199
 200 /* If set, then memory setting happens interactively.  */
 201
 202 #define MO_SETMEM_INTERACTIVE 0x8000
 203
 204 /* If set, then memory dumps are always on 16-byte boundaries, even
 205    when less is desired.  */
 206
 207 #define MO_GETMEM_16_BOUNDARY 0x10000
 208
 209 /* If set, then the monitor numbers its breakpoints starting from 1.  */
 210
 211 #define MO_CLR_BREAK_1_BASED 0x20000
 212
 213 /* If set, then the monitor acks srecords with a plus sign.  */
 214
 215 #define MO_SREC_ACK_PLUS 0x40000
 216
 217 /* If set, then the monitor "acks" srecords with rotating lines.  */
 218
 219 #define MO_SREC_ACK_ROTATE 0x80000
 220
 221 /* If set, then remove useless address bits from memory addresses.  */
 222
 223 #define MO_ADDR_BITS_REMOVE 0x100000
 224
 225 /* If set, then display target program output if prefixed by ^O.  */
 226
 227 #define MO_PRINT_PROGRAM_OUTPUT 0x200000
 228
 229 /* Some dump bytes commands align the first data with the preceding
 230    16 byte boundary.  Some print blanks and start at the exactly the
 231    requested boundary.  */
 232
 233 #define MO_EXACT_DUMPADDR 0x400000
 234
 235 /* Rather entering and exiting the write memory dialog for each word byte,
 236    we can save time by transferring the whole block without exiting
 237    the memory editing mode.  You only need to worry about this
 238    if you are doing memory downloading.
 239    This engages a new write function registered with dcache.  */
 240
 241 #define MO_HAS_BLOCKWRITES 0x800000
 242
 243 #define SREC_SIZE 160
 244
 245 extern void monitor_open (char *args, struct monitor_ops *ops, int from_tty);
 246 extern void monitor_close (int quitting);
 247 extern char *monitor_supply_register (struct regcache *regcache,
 248                                       int regno, char *valstr);
 249 extern int monitor_expect (char *prompt, char *buf, int buflen);
 250 extern int monitor_expect_prompt (char *buf, int buflen);
 251 /* Note: The variable argument functions monitor_printf and
 252    monitor_printf_noecho vararg do not take take standard format style
 253    arguments.  Instead they take custom formats interpretered directly
 254    by monitor_vsprintf.  */
 255 extern void monitor_printf (char *, ...);
 256 extern void monitor_printf_noecho (char *, ...);
 257 extern void monitor_write (char *buf, int buflen);
 258 extern int monitor_readchar (void);
 259 extern char *monitor_get_dev_name (void);
 260 extern void init_monitor_ops (struct target_ops *);
 261 extern int monitor_dump_reg_block (struct regcache *regcache, char *dump_cmd);
 262
 263 #endif