/* Remote debugging interface to Xilinx MicroBlaze. Copyright 2009, 2010, 2011 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "defs.h" #include "gdbcore.h" #include "target.h" #include "monitor.h" #include "gdb_string.h" #include "serial.h" #include "regcache.h" static char *picobug_inits[] = {"\r", NULL}; static struct target_ops picobug_ops; static struct monitor_ops picobug_cmds; /* Picobug only supports a subset of registers from MCore. In reality, it doesn't support ss1, either. */ static char *picobug_regnames[] = { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, "psr", "vbr", "epsr", "fpsr", "epc", "fpc", 0, "ss1", "ss2", "ss3", "ss4", 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, "pc" }; static void picobug_open (char *args, int from_tty) { monitor_open (args, &picobug_cmds, from_tty); } /* We choose to write our own dumpregs routine, since the output of the register dumping is rather difficult to encapsulate in a regexp: picobug> rd pc 2f00031e epc 2f00031e fpc 00000000 psr 80000101 epsr 80000101 fpsr 00000000 ss0-ss4 bad0beef 00000000 00000000 00000000 00000000 vbr 30005c00 r0-r7 2f0fff4c 00000090 00000001 00000002 00000003 00000004 00000005 00000006 r8-r15 2f0fff64 00000000 00000000 00000000 00000000 00000000 00000000 2f00031e */ static int picobug_dumpregs (struct regcache *regcache) { struct gdbarch *gdbarch = get_regcache_arch (regcache); char buf[1024]; int resp_len; char *p; /* Send the dump register command to the monitor and get the reply. */ monitor_printf (picobug_cmds.dump_registers); resp_len = monitor_expect_prompt (buf, sizeof (buf)); p = strtok (buf, " \t\r\n"); while (p) { if (strchr (p, '-')) { /* Got a range. Either r0-r7, r8-r15 or ss0-ss4. */ if (strncmp (p, "r0", 2) == 0 || strncmp (p, "r8", 2) == 0) { int rn = (p[1] == '0' ? 0 : 8); int i = 0; /* Get the next 8 values and record them. */ while (i < 8) { p = strtok (NULL, " \t\r\n"); if (p) monitor_supply_register (regcache, rn + i, p); i++; } } else if (strncmp (p, "ss", 2) == 0) { /* Get the next five values, ignoring the first. */ int rn; p = strtok (NULL, " \t\r\n"); for (rn = 39; rn < 43; rn++) { p = strtok (NULL, " \t\r\n"); if (p) monitor_supply_register (regcache, rn, p); } } else { break; } } else { /* Simple register type, paired. */ char *name = p; int i; /* Get and record value. */ p = strtok (NULL, " \t\r\n"); if (p) { for (i = 0; i < gdbarch_num_regs (gdbarch); i++) { if (picobug_regnames[i] && strcmp (picobug_regnames[i], name) == 0) break; } if (i <= gdbarch_num_regs (gdbarch)) monitor_supply_register (regcache, i, p); } } p = strtok (NULL, " \t\r\n"); } return 0; } static void init_picobug_cmds (void) { picobug_cmds.flags = MO_GETMEM_NEEDS_RANGE | MO_CLR_BREAK_USES_ADDR | MO_PRINT_PROGRAM_OUTPUT; picobug_cmds.init = picobug_inits; /* Init strings */ picobug_cmds.cont = "g\n"; /* continue command */ picobug_cmds.step = "s\n"; /* single step */ picobug_cmds.set_break = "br %x\n"; /* set a breakpoint */ picobug_cmds.clr_break = "nobr %x\n"; /* clear a breakpoint */ picobug_cmds.clr_all_break = "nobr\n"; /* clear all breakpoints */ picobug_cmds.setmem.cmdb = "mm %x %x ;b\n"; /* setmem.cmdb (addr, value) */ picobug_cmds.setmem.cmdw = "mm %x %x ;h\n"; /* setmem.cmdw (addr, value) */ picobug_cmds.setmem.cmdl = "mm %x %x ;w\n"; /* setmem.cmdl (addr, value) */ picobug_cmds.getmem.cmdb = "md %x %x\n"; /* getmem.cmdb (start addr, end addr) */ picobug_cmds.getmem.resp_delim = ":"; /* getmem.resp_delim */ picobug_cmds.setreg.cmd = "rm %s %x\n"; /* setreg.cmd (name, value) */ picobug_cmds.getreg.cmd = "rd %s\n"; /* getreg.cmd (name) */ picobug_cmds.getreg.resp_delim = ":"; /* getreg.resp_delim */ picobug_cmds.dump_registers = "rd\n"; /* dump_registers */ picobug_cmds.dumpregs = picobug_dumpregs; /* dump registers parser */ picobug_cmds.load = "lo\n"; /* download command */ picobug_cmds.prompt = "picobug> "; /* monitor command prompt */ picobug_cmds.line_term = "\n"; /* end-of-line terminator */ picobug_cmds.target = &picobug_ops; /* target operations */ picobug_cmds.stopbits = SERIAL_1_STOPBITS; /* number of stop bits */ picobug_cmds.regnames = picobug_regnames; /* registers names */ picobug_cmds.num_breakpoints = 20; /* number of breakpoints */ picobug_cmds.magic = MONITOR_OPS_MAGIC; /* magic */ } void _initialize_picobug_rom () { int i; /* Initialize m32r RevC monitor target. */ init_picobug_cmds (); init_monitor_ops (&picobug_ops); picobug_ops.to_shortname = "picobug"; picobug_ops.to_longname = "picobug monitor"; picobug_ops.to_doc = "Debug via the picobug monitor.\n\ Specify the serial device it is connected to (e.g. /dev/ttya)."; picobug_ops.to_open = picobug_open; add_target (&picobug_ops); }