| 1 | /* Remote target glue for the ROM68K ROM monitor. |
| 2 | Copyright 1988, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001 |
| 3 | 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 | #include "defs.h" |
| 23 | #include "gdbcore.h" |
| 24 | #include "target.h" |
| 25 | #include "monitor.h" |
| 26 | #include "serial.h" |
| 27 | #include "regcache.h" |
| 28 | #include "value.h" |
| 29 | |
| 30 | #include "m68k-tdep.h" |
| 31 | |
| 32 | static void rom68k_open (char *args, int from_tty); |
| 33 | |
| 34 | /* Return true if C is a hex digit. |
| 35 | We can't use isxdigit here: that is affected by the current locale; |
| 36 | ROM68K is not. */ |
| 37 | static int |
| 38 | is_hex_digit (int c) |
| 39 | { |
| 40 | return (('0' <= c && c <= '9') |
| 41 | || ('a' <= c && c <= 'f') |
| 42 | || ('A' <= c && c <= 'F')); |
| 43 | } |
| 44 | |
| 45 | |
| 46 | /* Convert hex digit A to a number. */ |
| 47 | static int |
| 48 | hex_digit_value (int a) |
| 49 | { |
| 50 | if (a >= '0' && a <= '9') |
| 51 | return a - '0'; |
| 52 | else if (a >= 'a' && a <= 'f') |
| 53 | return a - 'a' + 10; |
| 54 | else if (a >= 'A' && a <= 'F') |
| 55 | return a - 'A' + 10; |
| 56 | else |
| 57 | error (_("Invalid hex digit %d"), a); |
| 58 | } |
| 59 | |
| 60 | |
| 61 | /* Return true iff C is a whitespace character. |
| 62 | We can't use isspace here: that is affected by the current locale; |
| 63 | ROM68K is not. */ |
| 64 | static int |
| 65 | is_whitespace (int c) |
| 66 | { |
| 67 | return (c == ' ' |
| 68 | || c == '\r' |
| 69 | || c == '\n' |
| 70 | || c == '\t' |
| 71 | || c == '\f'); |
| 72 | } |
| 73 | |
| 74 | |
| 75 | /* Parse a string of hex digits starting at HEX, supply them as the |
| 76 | value of register REGNO, skip any whitespace, and return a pointer |
| 77 | to the next character. |
| 78 | |
| 79 | There is a function in monitor.c, monitor_supply_register, which is |
| 80 | supposed to do this job. However, there is some rather odd stuff |
| 81 | in there (whitespace characters don't terminate numbers, for |
| 82 | example) that is incorrect for ROM68k. It's basically impossible |
| 83 | to safely tweak monitor_supply_register --- it's used by a zillion |
| 84 | other monitors; who knows what behaviors they're depending on. So |
| 85 | instead, we'll just use our own function, which can behave exactly |
| 86 | the way we want it to. */ |
| 87 | static char * |
| 88 | rom68k_supply_one_register (int regno, unsigned char *hex) |
| 89 | { |
| 90 | ULONGEST value; |
| 91 | unsigned char regbuf[MAX_REGISTER_SIZE]; |
| 92 | |
| 93 | value = 0; |
| 94 | while (*hex != '\0') |
| 95 | if (is_hex_digit (*hex)) |
| 96 | value = (value * 16) + hex_digit_value (*hex++); |
| 97 | else |
| 98 | break; |
| 99 | |
| 100 | /* Skip any whitespace. */ |
| 101 | while (is_whitespace (*hex)) |
| 102 | hex++; |
| 103 | |
| 104 | store_unsigned_integer (regbuf, register_size (current_gdbarch, regno), value); |
| 105 | regcache_raw_supply (current_regcache, regno, regbuf); |
| 106 | |
| 107 | return hex; |
| 108 | } |
| 109 | |
| 110 | |
| 111 | static void |
| 112 | rom68k_supply_register (char *regname, int regnamelen, char *val, int vallen) |
| 113 | { |
| 114 | int numregs; |
| 115 | int regno; |
| 116 | |
| 117 | numregs = 1; |
| 118 | regno = -1; |
| 119 | |
| 120 | if (regnamelen == 2) |
| 121 | switch (regname[0]) |
| 122 | { |
| 123 | case 'S': |
| 124 | if (regname[1] == 'R') |
| 125 | regno = PS_REGNUM; |
| 126 | break; |
| 127 | case 'P': |
| 128 | if (regname[1] == 'C') |
| 129 | regno = PC_REGNUM; |
| 130 | break; |
| 131 | case 'D': |
| 132 | if (regname[1] != 'R') |
| 133 | break; |
| 134 | regno = M68K_D0_REGNUM; |
| 135 | numregs = 8; |
| 136 | break; |
| 137 | case 'A': |
| 138 | if (regname[1] != 'R') |
| 139 | break; |
| 140 | regno = M68K_A0_REGNUM; |
| 141 | numregs = 7; |
| 142 | break; |
| 143 | } |
| 144 | else if (regnamelen == 3) |
| 145 | switch (regname[0]) |
| 146 | { |
| 147 | case 'I': |
| 148 | if (regname[1] == 'S' && regname[2] == 'P') |
| 149 | regno = SP_REGNUM; |
| 150 | } |
| 151 | |
| 152 | if (regno >= 0) |
| 153 | while (numregs-- > 0) |
| 154 | val = rom68k_supply_one_register (regno++, val); |
| 155 | } |
| 156 | |
| 157 | /* This array of registers need to match the indexes used by GDB. |
| 158 | This exists because the various ROM monitors use different strings |
| 159 | than does GDB, and don't necessarily support all the registers |
| 160 | either. So, typing "info reg sp" becomes a "r30". */ |
| 161 | |
| 162 | static const char * |
| 163 | rom68k_regname (int index) |
| 164 | { |
| 165 | |
| 166 | static char *regnames[] = |
| 167 | { |
| 168 | "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7", |
| 169 | "A0", "A1", "A2", "A3", "A4", "A5", "A6", "ISP", |
| 170 | "SR", "PC" |
| 171 | }; |
| 172 | |
| 173 | if ((index >= (sizeof (regnames) / sizeof(regnames[0]))) |
| 174 | || (index < 0) || (index >= NUM_REGS)) |
| 175 | return NULL; |
| 176 | else |
| 177 | return regnames[index]; |
| 178 | |
| 179 | } |
| 180 | |
| 181 | /* Define the monitor command strings. Since these are passed directly |
| 182 | through to a printf style function, we may include formatting |
| 183 | strings. We also need a CR or LF on the end. */ |
| 184 | |
| 185 | static struct target_ops rom68k_ops; |
| 186 | |
| 187 | static char *rom68k_inits[] = |
| 188 | {".\r\r", NULL}; /* Exits pm/pr & download cmds */ |
| 189 | |
| 190 | static struct monitor_ops rom68k_cmds; |
| 191 | |
| 192 | static void |
| 193 | init_rom68k_cmds (void) |
| 194 | { |
| 195 | rom68k_cmds.flags = MO_PRINT_PROGRAM_OUTPUT; |
| 196 | rom68k_cmds.init = rom68k_inits; /* monitor init string */ |
| 197 | rom68k_cmds.cont = "go\r"; |
| 198 | rom68k_cmds.step = "st\r"; |
| 199 | rom68k_cmds.stop = NULL; |
| 200 | rom68k_cmds.set_break = "db %x\r"; |
| 201 | rom68k_cmds.clr_break = "cb %x\r"; |
| 202 | rom68k_cmds.clr_all_break = "cb *\r"; |
| 203 | rom68k_cmds.fill = "fm %x %x %x\r"; |
| 204 | rom68k_cmds.setmem.cmdb = "pm %x %x\r"; |
| 205 | rom68k_cmds.setmem.cmdw = "pm.w %x %x\r"; |
| 206 | rom68k_cmds.setmem.cmdl = "pm.l %x %x\r"; |
| 207 | rom68k_cmds.setmem.cmdll = NULL; |
| 208 | rom68k_cmds.setmem.resp_delim = NULL; |
| 209 | rom68k_cmds.setmem.term = NULL; |
| 210 | rom68k_cmds.setmem.term_cmd = NULL; |
| 211 | rom68k_cmds.getmem.cmdb = "dm %x %x\r"; |
| 212 | rom68k_cmds.getmem.cmdw = "dm.w %x %x\r"; |
| 213 | rom68k_cmds.getmem.cmdl = "dm.l %x %x\r"; |
| 214 | rom68k_cmds.getmem.cmdll = NULL; |
| 215 | rom68k_cmds.getmem.resp_delim = " "; |
| 216 | rom68k_cmds.getmem.term = NULL; |
| 217 | rom68k_cmds.getmem.term_cmd = NULL; |
| 218 | rom68k_cmds.setreg.cmd = "pr %s %x\r"; |
| 219 | rom68k_cmds.setreg.resp_delim = NULL; |
| 220 | rom68k_cmds.setreg.term = NULL; |
| 221 | rom68k_cmds.setreg.term_cmd = NULL; |
| 222 | rom68k_cmds.getreg.cmd = "pr %s\r"; |
| 223 | rom68k_cmds.getreg.resp_delim = ": "; |
| 224 | rom68k_cmds.getreg.term = "= "; |
| 225 | rom68k_cmds.getreg.term_cmd = ".\r"; |
| 226 | rom68k_cmds.dump_registers = "dr\r"; |
| 227 | rom68k_cmds.register_pattern = |
| 228 | "\\(\\w+\\)=\\([0-9a-fA-F]+\\( +[0-9a-fA-F]+\\b\\)*\\)"; |
| 229 | rom68k_cmds.supply_register = rom68k_supply_register; |
| 230 | rom68k_cmds.load_routine = NULL; |
| 231 | rom68k_cmds.load = "dc\r"; |
| 232 | rom68k_cmds.loadresp = "Waiting for S-records from host... "; |
| 233 | rom68k_cmds.prompt = "ROM68K :-> "; |
| 234 | rom68k_cmds.line_term = "\r"; |
| 235 | rom68k_cmds.cmd_end = ".\r"; |
| 236 | rom68k_cmds.target = &rom68k_ops; |
| 237 | rom68k_cmds.stopbits = SERIAL_1_STOPBITS; |
| 238 | rom68k_cmds.regnames = NULL; |
| 239 | rom68k_cmds.regname = rom68k_regname; |
| 240 | rom68k_cmds.magic = MONITOR_OPS_MAGIC; |
| 241 | } /* init_rom68k_cmds */ |
| 242 | |
| 243 | static void |
| 244 | rom68k_open (char *args, int from_tty) |
| 245 | { |
| 246 | monitor_open (args, &rom68k_cmds, from_tty); |
| 247 | } |
| 248 | |
| 249 | extern initialize_file_ftype _initialize_rom68k; /* -Wmissing-prototypes */ |
| 250 | |
| 251 | void |
| 252 | _initialize_rom68k (void) |
| 253 | { |
| 254 | init_rom68k_cmds (); |
| 255 | init_monitor_ops (&rom68k_ops); |
| 256 | |
| 257 | rom68k_ops.to_shortname = "rom68k"; |
| 258 | rom68k_ops.to_longname = "Rom68k debug monitor for the IDP Eval board"; |
| 259 | rom68k_ops.to_doc = "Debug on a Motorola IDP eval board running the ROM68K monitor.\n\ |
| 260 | Specify the serial device it is connected to (e.g. /dev/ttya)."; |
| 261 | rom68k_ops.to_open = rom68k_open; |
| 262 | |
| 263 | add_target (&rom68k_ops); |
| 264 | } |