265 lines
7.2 KiB
C
265 lines
7.2 KiB
C
/* Remote target glue for the ROM68K ROM monitor.
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Copyright 1988, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "monitor.h"
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#include "serial.h"
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#include "regcache.h"
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#include "value.h"
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#include "m68k-tdep.h"
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static void rom68k_open (char *args, int from_tty);
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/* Return true if C is a hex digit.
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We can't use isxdigit here: that is affected by the current locale;
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ROM68K is not. */
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static int
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is_hex_digit (int c)
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{
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return (('0' <= c && c <= '9')
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|| ('a' <= c && c <= 'f')
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|| ('A' <= c && c <= 'F'));
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}
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/* Convert hex digit A to a number. */
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static int
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hex_digit_value (int a)
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{
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if (a >= '0' && a <= '9')
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return a - '0';
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else if (a >= 'a' && a <= 'f')
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return a - 'a' + 10;
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else if (a >= 'A' && a <= 'F')
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return a - 'A' + 10;
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else
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error ("Invalid hex digit %d", a);
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}
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/* Return true iff C is a whitespace character.
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We can't use isspace here: that is affected by the current locale;
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ROM68K is not. */
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static int
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is_whitespace (int c)
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{
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return (c == ' '
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|| c == '\r'
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|| c == '\n'
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|| c == '\t'
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|| c == '\f');
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}
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/* Parse a string of hex digits starting at HEX, supply them as the
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value of register REGNO, skip any whitespace, and return a pointer
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to the next character.
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There is a function in monitor.c, monitor_supply_register, which is
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supposed to do this job. However, there is some rather odd stuff
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in there (whitespace characters don't terminate numbers, for
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example) that is incorrect for ROM68k. It's basically impossible
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to safely tweak monitor_supply_register --- it's used by a zillion
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other monitors; who knows what behaviors they're depending on. So
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instead, we'll just use our own function, which can behave exactly
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the way we want it to. */
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static char *
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rom68k_supply_one_register (int regno, unsigned char *hex)
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{
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ULONGEST value;
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unsigned char regbuf[MAX_REGISTER_SIZE];
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value = 0;
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while (*hex != '\0')
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if (is_hex_digit (*hex))
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value = (value * 16) + hex_digit_value (*hex++);
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else
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break;
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/* Skip any whitespace. */
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while (is_whitespace (*hex))
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hex++;
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store_unsigned_integer (regbuf, DEPRECATED_REGISTER_RAW_SIZE (regno), value);
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supply_register (regno, regbuf);
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return hex;
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}
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static void
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rom68k_supply_register (char *regname, int regnamelen, char *val, int vallen)
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{
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int numregs;
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int regno;
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numregs = 1;
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regno = -1;
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if (regnamelen == 2)
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switch (regname[0])
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{
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case 'S':
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if (regname[1] == 'R')
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regno = PS_REGNUM;
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break;
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case 'P':
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if (regname[1] == 'C')
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regno = PC_REGNUM;
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break;
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case 'D':
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if (regname[1] != 'R')
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break;
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regno = M68K_D0_REGNUM;
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numregs = 8;
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break;
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case 'A':
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if (regname[1] != 'R')
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break;
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regno = M68K_A0_REGNUM;
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numregs = 7;
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break;
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}
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else if (regnamelen == 3)
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switch (regname[0])
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{
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case 'I':
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if (regname[1] == 'S' && regname[2] == 'P')
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regno = SP_REGNUM;
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}
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if (regno >= 0)
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while (numregs-- > 0)
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val = rom68k_supply_one_register (regno++, val);
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}
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/* This array of registers need to match the indexes used by GDB.
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This exists because the various ROM monitors use different strings
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than does GDB, and don't necessarily support all the registers
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either. So, typing "info reg sp" becomes a "r30". */
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static const char *
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rom68k_regname (int index)
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{
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static char *regnames[] =
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{
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"D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
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"A0", "A1", "A2", "A3", "A4", "A5", "A6", "ISP",
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"SR", "PC"
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};
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if ((index >= (sizeof (regnames) / sizeof(regnames[0])))
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|| (index < 0) || (index >= NUM_REGS))
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return NULL;
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else
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return regnames[index];
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}
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/* Define the monitor command strings. Since these are passed directly
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through to a printf style function, we may include formatting
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strings. We also need a CR or LF on the end. */
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static struct target_ops rom68k_ops;
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static char *rom68k_inits[] =
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{".\r\r", NULL}; /* Exits pm/pr & download cmds */
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static struct monitor_ops rom68k_cmds;
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static void
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init_rom68k_cmds (void)
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{
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rom68k_cmds.flags = MO_PRINT_PROGRAM_OUTPUT;
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rom68k_cmds.init = rom68k_inits; /* monitor init string */
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rom68k_cmds.cont = "go\r";
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rom68k_cmds.step = "st\r";
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rom68k_cmds.stop = NULL;
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rom68k_cmds.set_break = "db %x\r";
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rom68k_cmds.clr_break = "cb %x\r";
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rom68k_cmds.clr_all_break = "cb *\r";
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rom68k_cmds.fill = "fm %x %x %x\r";
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rom68k_cmds.setmem.cmdb = "pm %x %x\r";
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rom68k_cmds.setmem.cmdw = "pm.w %x %x\r";
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rom68k_cmds.setmem.cmdl = "pm.l %x %x\r";
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rom68k_cmds.setmem.cmdll = NULL;
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rom68k_cmds.setmem.resp_delim = NULL;
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rom68k_cmds.setmem.term = NULL;
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rom68k_cmds.setmem.term_cmd = NULL;
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rom68k_cmds.getmem.cmdb = "dm %x %x\r";
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rom68k_cmds.getmem.cmdw = "dm.w %x %x\r";
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rom68k_cmds.getmem.cmdl = "dm.l %x %x\r";
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rom68k_cmds.getmem.cmdll = NULL;
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rom68k_cmds.getmem.resp_delim = " ";
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rom68k_cmds.getmem.term = NULL;
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rom68k_cmds.getmem.term_cmd = NULL;
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rom68k_cmds.setreg.cmd = "pr %s %x\r";
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rom68k_cmds.setreg.resp_delim = NULL;
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rom68k_cmds.setreg.term = NULL;
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rom68k_cmds.setreg.term_cmd = NULL;
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rom68k_cmds.getreg.cmd = "pr %s\r";
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rom68k_cmds.getreg.resp_delim = ": ";
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rom68k_cmds.getreg.term = "= ";
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rom68k_cmds.getreg.term_cmd = ".\r";
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rom68k_cmds.dump_registers = "dr\r";
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rom68k_cmds.register_pattern =
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"\\(\\w+\\)=\\([0-9a-fA-F]+\\( +[0-9a-fA-F]+\\b\\)*\\)";
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rom68k_cmds.supply_register = rom68k_supply_register;
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rom68k_cmds.load_routine = NULL;
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rom68k_cmds.load = "dc\r";
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rom68k_cmds.loadresp = "Waiting for S-records from host... ";
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rom68k_cmds.prompt = "ROM68K :-> ";
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rom68k_cmds.line_term = "\r";
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rom68k_cmds.cmd_end = ".\r";
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rom68k_cmds.target = &rom68k_ops;
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rom68k_cmds.stopbits = SERIAL_1_STOPBITS;
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rom68k_cmds.regnames = NULL;
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rom68k_cmds.regname = rom68k_regname;
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rom68k_cmds.magic = MONITOR_OPS_MAGIC;
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} /* init_rom68k_cmds */
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static void
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rom68k_open (char *args, int from_tty)
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{
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monitor_open (args, &rom68k_cmds, from_tty);
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}
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extern initialize_file_ftype _initialize_rom68k; /* -Wmissing-prototypes */
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void
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_initialize_rom68k (void)
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{
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init_rom68k_cmds ();
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init_monitor_ops (&rom68k_ops);
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rom68k_ops.to_shortname = "rom68k";
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rom68k_ops.to_longname = "Rom68k debug monitor for the IDP Eval board";
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rom68k_ops.to_doc = "Debug on a Motorola IDP eval board running the ROM68K monitor.\n\
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Specify the serial device it is connected to (e.g. /dev/ttya).";
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rom68k_ops.to_open = rom68k_open;
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add_target (&rom68k_ops);
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}
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