target/xtensa: avoid IHI for writes to non-executable memory
[openocd.git] / src / openocd.c
index 8cac5530a48b49c1836531d5e1047da48b5dcd99..54c5eb34f7880b273bfb1d2ff67c1ace45e4e992 100644 (file)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
 /***************************************************************************
  *   Copyright (C) 2005 by Dominic Rath                                    *
  *   Dominic.Rath@gmx.de                                                   *
  *                                                                         *
- *   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 2 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.                          *
+ *   Copyright (C) 2007-2010 Ã˜yvind Harboe                                 *
+ *   oyvind.harboe@zylin.com                                               *
  *                                                                         *
- *   You should have received a copy of the GNU General Public License     *
- *   along with this program; if not, write to the                         *
- *   Free Software Foundation, Inc.,                                       *
- *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ *   Copyright (C) 2008 Richard Missenden                                  *
+ *   richard.missenden@googlemail.com                                      *
  ***************************************************************************/
 
-#define OPENOCD_VERSION "Open On-Chip Debugger " VERSION " (" PKGBLDDATE ") svn:" PKGBLDREV
-
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
-#include "log.h"
-#include "types.h"
-#include "jtag.h"
-#include "configuration.h"
-#include "xsvf.h"
-#include "target.h"
-#include "flash.h"
-#include "nand.h"
-#include "pld.h"
-
-#include "command.h"
-#include "server.h"
-#include "telnet_server.h"
-#include "gdb_server.h"
-#include "tcl_server.h"
-
-#include <sys/time.h>
-#include <sys/types.h>
+#include "openocd.h"
+#include <jtag/adapter.h>
+#include <jtag/jtag.h>
+#include <transport/transport.h>
+#include <helper/util.h>
+#include <helper/configuration.h>
+#include <flash/nor/core.h>
+#include <flash/nand/core.h>
+#include <pld/pld.h>
+#include <target/arm_cti.h>
+#include <target/arm_adi_v5.h>
+#include <target/arm_tpiu_swo.h>
+#include <rtt/rtt.h>
+
+#include <server/server.h>
+#include <server/gdb_server.h>
+#include <server/rtt_server.h>
+
+#ifdef HAVE_STRINGS_H
 #include <strings.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-
-#ifdef _WIN32
-#include <malloc.h>
-#else
-#include <alloca.h>
 #endif
 
-#ifdef __ECOS
-/* Jim is provied by eCos */
-#include <cyg/jimtcl/jim.h>
+#ifdef PKGBLDDATE
+#define OPENOCD_VERSION        \
+       "Open On-Chip Debugger " VERSION RELSTR " (" PKGBLDDATE ")"
 #else
-#define JIM_EMBEDDED
-#include "jim.h"
+#define OPENOCD_VERSION        \
+       "Open On-Chip Debugger " VERSION RELSTR
 #endif
 
-#include "replacements.h"
-
+static const char openocd_startup_tcl[] = {
+#include "startup_tcl.inc"
+0 /* Terminate with zero */
+};
 
-/* Give TELNET a way to find out what version this is */
-int handle_version_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+/* Give scripts and TELNET a way to find out what version this is */
+COMMAND_HANDLER(handler_version_command)
 {
-       command_print(cmd_ctx, OPENOCD_VERSION);
+       char *version_str = OPENOCD_VERSION;
+
+       if (CMD_ARGC > 1)
+               return ERROR_COMMAND_SYNTAX_ERROR;
+
+       if (CMD_ARGC == 1) {
+               if (strcmp("git", CMD_ARGV[0]))
+                       return ERROR_COMMAND_ARGUMENT_INVALID;
+
+               version_str = GITVERSION;
+       }
+
+       command_print(CMD, "%s", version_str);
 
        return ERROR_OK;
 }
 
-static int daemon_startup = 0;
-
-int handle_daemon_startup_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+static int log_target_callback_event_handler(struct target *target,
+       enum target_event event,
+       void *priv)
 {
-       if (argc==0)
-               return ERROR_OK;
-       if (argc > 1 )
-               return ERROR_COMMAND_SYNTAX_ERROR;
-       
-       daemon_startup = strcmp("reset", args[0])==0;
-       
-       command_print(cmd_ctx, OPENOCD_VERSION);
+       switch (event) {
+               case TARGET_EVENT_GDB_START:
+                       target->verbose_halt_msg = false;
+                       break;
+               case TARGET_EVENT_GDB_END:
+                       target->verbose_halt_msg = true;
+                       break;
+               case TARGET_EVENT_HALTED:
+                       if (target->verbose_halt_msg) {
+                               /* do not display information when debugger caused the halt */
+                               target_arch_state(target);
+                       }
+                       break;
+               default:
+                       break;
+       }
 
        return ERROR_OK;
 }
 
-void exit_handler(void)
+static bool init_at_startup = true;
+
+COMMAND_HANDLER(handle_noinit_command)
 {
-       /* close JTAG interface */
-       if (jtag && jtag->quit)
-               jtag->quit();
+       if (CMD_ARGC != 0)
+               return ERROR_COMMAND_SYNTAX_ERROR;
+       init_at_startup = false;
+       return ERROR_OK;
 }
 
 /* OpenOCD can't really handle failure of this command. Patches welcome! :-) */
-int handle_init_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_init_command)
 {
+
+       if (CMD_ARGC != 0)
+               return ERROR_COMMAND_SYNTAX_ERROR;
+
        int retval;
-       static int initialized=0;
+       static int initialized;
        if (initialized)
                return ERROR_OK;
-       
-       initialized=1;
-       
-       command_set_output_handler(cmd_ctx, configuration_output_handler, NULL);
 
-       atexit(exit_handler);
-       
-       if (target_init(cmd_ctx) != ERROR_OK)
+       initialized = 1;
+
+       bool save_poll_mask = jtag_poll_mask();
+
+       retval = command_run_line(CMD_CTX, "target init");
+       if (retval != ERROR_OK)
                return ERROR_FAIL;
-       LOG_DEBUG("target init complete");
 
-       if ((retval=jtag_interface_init(cmd_ctx)) != ERROR_OK)
-       {
-               /* we must be able to set up the jtag interface */
+       retval = adapter_init(CMD_CTX);
+       if (retval != ERROR_OK) {
+               /* we must be able to set up the debug adapter */
                return retval;
        }
-       LOG_DEBUG("jtag interface init complete");
 
-       /* Try to initialize & examine the JTAG chain at this point, but
-        * continue startup regardless */
-       if (jtag_init(cmd_ctx) == ERROR_OK)
-       {
-               LOG_DEBUG("jtag init complete");
-               if (target_examine(cmd_ctx) == ERROR_OK)
-               {
-                       LOG_DEBUG("jtag examine complete");
-               }
-       }
-       
-       if (flash_init_drivers(cmd_ctx) != ERROR_OK)
-               return ERROR_FAIL;
-       LOG_DEBUG("flash init complete");
+       LOG_DEBUG("Debug Adapter init complete");
 
-       if (nand_init(cmd_ctx) != ERROR_OK)
-               return ERROR_FAIL;
-       LOG_DEBUG("NAND init complete");
+       /* "transport init" verifies the expected devices are present;
+        * for JTAG, it checks the list of configured TAPs against
+        * what's discoverable, possibly with help from the platform's
+        * JTAG event handlers.  (which require COMMAND_EXEC)
+        */
+       command_context_mode(CMD_CTX, COMMAND_EXEC);
 
-       if (pld_init(cmd_ctx) != ERROR_OK)
+       retval = command_run_line(CMD_CTX, "transport init");
+       if (retval != ERROR_OK)
                return ERROR_FAIL;
-       LOG_DEBUG("pld init complete");
-
-       /* initialize tcp server */
-       server_init();
 
-       /* initialize telnet subsystem */
-       telnet_init("Open On-Chip Debugger");
-       gdb_init();
-       tcl_init(); /* allows tcl to just connect without going thru telnet */
-
-       return ERROR_OK;
-}
+       retval = command_run_line(CMD_CTX, "dap init");
+       if (retval != ERROR_OK)
+               return ERROR_FAIL;
 
-Jim_Interp *interp;
-command_context_t *active_cmd_ctx;
+       LOG_DEBUG("Examining targets...");
+       if (target_examine() != ERROR_OK)
+               LOG_DEBUG("target examination failed");
 
-static int new_int_array_element(Jim_Interp * interp, const char *varname, int idx, u32 val)
-{
-       char *namebuf;
-       Jim_Obj *nameObjPtr, *valObjPtr;
-       int result;
-
-       namebuf = alloc_printf("%s(%d)", varname, idx);
-       if (!namebuf)
-               return JIM_ERR;
-       
-       nameObjPtr = Jim_NewStringObj(interp, namebuf, -1);
-       valObjPtr = Jim_NewIntObj(interp, val);
-       if (!nameObjPtr || !valObjPtr)
-       {
-               free(namebuf);
-               return JIM_ERR;
-       }
+       command_context_mode(CMD_CTX, COMMAND_CONFIG);
 
-       Jim_IncrRefCount(nameObjPtr);
-       Jim_IncrRefCount(valObjPtr);
-       result = Jim_SetVariable(interp, nameObjPtr, valObjPtr);
-       Jim_DecrRefCount(interp, nameObjPtr);
-       Jim_DecrRefCount(interp, valObjPtr);
-       free(namebuf);
-       /* printf("%s(%d) <= 0%08x\n", varname, idx, val); */
-       return result;
-}
+       if (command_run_line(CMD_CTX, "flash init") != ERROR_OK)
+               return ERROR_FAIL;
 
-static int Jim_Command_mem2array(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
-{
-       target_t *target;
-       long l;
-       u32 width;
-       u32 len;
-       u32 addr;
-       u32 count;
-       u32 v;
-       const char *varname;
-       u8 buffer[4096];
-       int  i, n, e, retval;
-
-       /* argv[1] = name of array to receive the data
-        * argv[2] = desired width
-        * argv[3] = memory address 
-        * argv[4] = count of times to read
-        */
-       if (argc != 5) {
-               Jim_WrongNumArgs(interp, 1, argv, "varname width addr nelems");
-               return JIM_ERR;
-       }
-       varname = Jim_GetString(argv[1], &len);
-       /* given "foo" get space for worse case "foo(%d)" .. add 20 */
+       if (command_run_line(CMD_CTX, "nand init") != ERROR_OK)
+               return ERROR_FAIL;
 
-       e = Jim_GetLong(interp, argv[2], &l);
-       width = l;
-       if (e != JIM_OK) {
-               return e;
-       }
-       
-       e = Jim_GetLong(interp, argv[3], &l);
-       addr = l;
-       if (e != JIM_OK) {
-               return e;
-       }
-       e = Jim_GetLong(interp, argv[4], &l);
-       len = l;
-       if (e != JIM_OK) {
-               return e;
-       }
-       switch (width) {
-               case 8:
-                       width = 1;
-                       break;
-               case 16:
-                       width = 2;
-                       break;
-               case 32:
-                       width = 4;
-                       break;
-               default:
-                       Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-                       Jim_AppendStrings( interp, Jim_GetResult(interp), "Invalid width param, must be 8/16/32", NULL );
-                       return JIM_ERR;
-       }
-       if (len == 0) {
-               Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: zero width read?", NULL);
-               return JIM_ERR;
-       }
-       if ((addr + (len * width)) < addr) {
-               Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: addr + len - wraps to zero?", NULL);
-               return JIM_ERR;
-       }
-       /* absurd transfer size? */
-       if (len > 65536) {
-               Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: absurd > 64K item request", NULL);
-               return JIM_ERR;
-       }               
-               
-       if ((width == 1) ||
-               ((width == 2) && ((addr & 1) == 0)) ||
-               ((width == 4) && ((addr & 3) == 0))) {
-               /* all is well */
-       } else {
-               char buf[100];
-               Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               sprintf(buf, "mem2array address: 0x%08x is not aligned for %d byte reads", addr, width); 
-               Jim_AppendStrings(interp, Jim_GetResult(interp), buf , NULL);
-               return JIM_ERR;
-       }
+       if (command_run_line(CMD_CTX, "pld init") != ERROR_OK)
+               return ERROR_FAIL;
+       command_context_mode(CMD_CTX, COMMAND_EXEC);
 
-       target = get_current_target(active_cmd_ctx);
-       
-       /* Transfer loop */
-
-       /* index counter */
-       n = 0;
-       /* assume ok */
-       e = JIM_OK;
-       while (len) {
-               /* Slurp... in buffer size chunks */
-               
-               count = len; /* in objects.. */
-               if (count > (sizeof(buffer)/width)) {
-                       count = (sizeof(buffer)/width);
-               }
-               
-               retval = target->type->read_memory( target, addr, width, count, buffer );
-               if (retval != ERROR_OK) {
-                       /* BOO !*/
-                       LOG_ERROR("mem2array: Read @ 0x%08x, w=%d, cnt=%d, failed", addr, width, count);
-                       Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-                       Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: cannot read memory", NULL);
-                       e = JIM_ERR;
-                       len = 0;
-               } else {
-                       v = 0; /* shut up gcc */
-                       for (i = 0 ;i < count ;i++, n++) {
-                               switch (width) {
-                                       case 4:
-                                               v = target_buffer_get_u32(target, &buffer[i*width]);
-                                               break;
-                                       case 2:
-                                               v = target_buffer_get_u16(target, &buffer[i*width]);
-                                               break;
-                                       case 1:
-                                               v = buffer[i] & 0x0ff;
-                                               break;
-                               }
-                               new_int_array_element(interp, varname, n, v);
-                       }
-                       len -= count;
-               }
-       }
-       
-       Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
+       /* in COMMAND_EXEC, after target_examine(), only tpiu or only swo */
+       if (command_run_line(CMD_CTX, "tpiu init") != ERROR_OK)
+               return ERROR_FAIL;
 
-       return JIM_OK;
-}
+       jtag_poll_unmask(save_poll_mask);
 
-static int get_int_array_element(Jim_Interp * interp, const char *varname, int idx, u32 *val)
-{
-       char *namebuf;
-       Jim_Obj *nameObjPtr, *valObjPtr;
-       int result;
-       long l;
+       /* initialize telnet subsystem */
+       gdb_target_add_all(all_targets);
 
-       namebuf = alloc_printf("%s(%d)", varname, idx);
-       if (!namebuf)
-               return JIM_ERR;
+       target_register_event_callback(log_target_callback_event_handler, CMD_CTX);
 
-       nameObjPtr = Jim_NewStringObj(interp, namebuf, -1);
-       if (!nameObjPtr)
-       {
-               free(namebuf);
-               return JIM_ERR;
-       }
+       if (command_run_line(CMD_CTX, "_run_post_init_commands") != ERROR_OK)
+               return ERROR_FAIL;
 
-       Jim_IncrRefCount(nameObjPtr);
-       valObjPtr = Jim_GetVariable(interp, nameObjPtr, JIM_ERRMSG);
-       Jim_DecrRefCount(interp, nameObjPtr);
-       free(namebuf);
-       if (valObjPtr == NULL)
-               return JIM_ERR;
-
-       result = Jim_GetLong(interp, valObjPtr, &l);
-       /* printf("%s(%d) => 0%08x\n", varname, idx, val); */
-       *val = l;
-       return result;
+       return ERROR_OK;
 }
 
-static int Jim_Command_array2mem(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+COMMAND_HANDLER(handle_add_script_search_dir_command)
 {
-       target_t *target;
-       long l;
-       u32 width;
-       u32 len;
-       u32 addr;
-       u32 count;
-       u32 v;
-       const char *varname;
-       u8 buffer[4096];
-       int  i, n, e, retval;
-
-       /* argv[1] = name of array to get the data
-        * argv[2] = desired width
-        * argv[3] = memory address 
-        * argv[4] = count to write
-        */
-       if (argc != 5) {
-               Jim_WrongNumArgs(interp, 1, argv, "varname width addr nelems");
-               return JIM_ERR;
-       }
-       varname = Jim_GetString(argv[1], &len);
-       /* given "foo" get space for worse case "foo(%d)" .. add 20 */
-
-       e = Jim_GetLong(interp, argv[2], &l);
-       width = l;
-       if (e != JIM_OK) {
-               return e;
-       }
-       
-       e = Jim_GetLong(interp, argv[3], &l);
-       addr = l;
-       if (e != JIM_OK) {
-               return e;
-       }
-       e = Jim_GetLong(interp, argv[4], &l);
-       len = l;
-       if (e != JIM_OK) {
-               return e;
-       }
-       switch (width) {
-               case 8:
-                       width = 1;
-                       break;
-               case 16:
-                       width = 2;
-                       break;
-               case 32:
-                       width = 4;
-                       break;
-               default:
-                       Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-                       Jim_AppendStrings( interp, Jim_GetResult(interp), "Invalid width param, must be 8/16/32", NULL );
-                       return JIM_ERR;
-       }
-       if (len == 0) {
-               Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               Jim_AppendStrings(interp, Jim_GetResult(interp), "array2mem: zero width read?", NULL);
-               return JIM_ERR;
-       }
-       if ((addr + (len * width)) < addr) {
-               Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               Jim_AppendStrings(interp, Jim_GetResult(interp), "array2mem: addr + len - wraps to zero?", NULL);
-               return JIM_ERR;
-       }
-       /* absurd transfer size? */
-       if (len > 65536) {
-               Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               Jim_AppendStrings(interp, Jim_GetResult(interp), "array2mem: absurd > 64K item request", NULL);
-               return JIM_ERR;
-       }               
-               
-       if ((width == 1) ||
-               ((width == 2) && ((addr & 1) == 0)) ||
-               ((width == 4) && ((addr & 3) == 0))) {
-               /* all is well */
-       } else {
-               char buf[100];
-               Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               sprintf(buf, "array2mem address: 0x%08x is not aligned for %d byte reads", addr, width); 
-               Jim_AppendStrings(interp, Jim_GetResult(interp), buf , NULL);
-               return JIM_ERR;
-       }
-
-       target = get_current_target(active_cmd_ctx);
-       
-       /* Transfer loop */
-
-       /* index counter */
-       n = 0;
-       /* assume ok */
-       e = JIM_OK;
-       while (len) {
-               /* Slurp... in buffer size chunks */
-               
-               count = len; /* in objects.. */
-               if (count > (sizeof(buffer)/width)) {
-                       count = (sizeof(buffer)/width);
-               }
-
-               v = 0; /* shut up gcc */
-               for (i = 0 ;i < count ;i++, n++) {
-                       get_int_array_element(interp, varname, n, &v);
-                       switch (width) {
-                       case 4:
-                               target_buffer_set_u32(target, &buffer[i*width], v);
-                               break;
-                       case 2:
-                               target_buffer_set_u16(target, &buffer[i*width], v);
-                               break;
-                       case 1:
-                               buffer[i] = v & 0x0ff;
-                               break;
-                       }
-               }
-               len -= count;
-
-               retval = target->type->write_memory(target, addr, width, count, buffer);
-               if (retval != ERROR_OK) {
-                       /* BOO !*/
-                       LOG_ERROR("array2mem: Write @ 0x%08x, w=%d, cnt=%d, failed", addr, width, count);
-                       Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-                       Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: cannot read memory", NULL);
-                       e = JIM_ERR;
-                       len = 0;
-               }
-       }
-       
-       Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-
-       return JIM_OK;
-}
+       if (CMD_ARGC != 1)
+               return ERROR_COMMAND_SYNTAX_ERROR;
 
-static void tcl_output(void *privData, const char *file, int line, const char *function, const char *string)
-{              
-       Jim_Obj *tclOutput=(Jim_Obj *)privData;
+       add_script_search_dir(CMD_ARGV[0]);
 
-       Jim_AppendString(interp, tclOutput, string, strlen(string));
+       return ERROR_OK;
 }
 
-/* try to execute as Jim command, otherwise fall back to standard command.
- * Note that even if the Jim command caused an error, then we succeeded
- * to execute it, hence this fn pretty much always returns ERROR_OK. */
-int jim_command(command_context_t *context, char *line)
+static const struct command_registration openocd_command_handlers[] = {
+       {
+               .name = "version",
+               .handler = handler_version_command,
+               .mode = COMMAND_ANY,
+               .help = "show program version",
+               .usage = "[git]",
+       },
+       {
+               .name = "noinit",
+               .handler = &handle_noinit_command,
+               .mode = COMMAND_CONFIG,
+               .help = "Prevent 'init' from being called at startup.",
+               .usage = ""
+       },
+       {
+               .name = "init",
+               .handler = &handle_init_command,
+               .mode = COMMAND_ANY,
+               .help = "Initializes configured targets and servers.  "
+                       "Changes command mode from CONFIG to EXEC.  "
+                       "Unless 'noinit' is called, this command is "
+                       "called automatically at the end of startup.",
+               .usage = ""
+       },
+       {
+               .name = "add_script_search_dir",
+               .handler = &handle_add_script_search_dir_command,
+               .mode = COMMAND_ANY,
+               .help = "dir to search for config files and scripts",
+               .usage = "<directory>"
+       },
+       COMMAND_REGISTRATION_DONE
+};
+
+static int openocd_register_commands(struct command_context *cmd_ctx)
 {
-       int retval=ERROR_OK;
-       int retcode=Jim_Eval(interp, line);
-       
-       if (retcode == JIM_ERR) {
-               Jim_PrintErrorMessage(interp);
-           long t;
-           Jim_Obj *openocd_result=Jim_GetVariableStr(interp, "openocd_result", JIM_ERRMSG);
-           if (openocd_result)
-           {
-                   if (Jim_GetLong(interp, openocd_result, &t)==JIM_OK)
-                   {
-                       return t;
-                   }
-               }
-           return ERROR_FAIL;
-       } 
-       const char *result;
-       int reslen;
-       result = Jim_GetString(Jim_GetResult(interp), &reslen);
-               
-       if (retcode == JIM_EXIT) {
-               /* ignore. */
-       /* exit(Jim_GetExitCode(interp)); */
-       } else {
-               if (reslen) {
-                       int i;
-                       char buff[256+1];
-                       for (i = 0; i < reslen; i += 256)
-                       {
-                               int chunk;
-                               chunk = reslen - i;
-                               if (chunk > 256)
-                                       chunk = 256;
-                       strncpy(buff, result+i, chunk);
-                               buff[chunk] = 0; 
-                               LOG_USER_N("%s", buff);
-                       }
-                       LOG_USER_N("%s", "\n");
-               }
-       }
-       return retval;
+       return register_commands(cmd_ctx, NULL, openocd_command_handlers);
 }
 
-int startLoop = 0;
+struct command_context *global_cmd_ctx;
 
-static int Jim_Command_openocd_ignore(Jim_Interp *interp, int argc, Jim_Obj *const *argv, int ignore)
+static struct command_context *setup_command_handler(Jim_Interp *interp)
 {
-       int retval;
-       char *cmd = (char*)Jim_GetString(argv[1], NULL);
-       
-       Jim_Obj *tclOutput = Jim_NewStringObj(interp, "", 0);
-       
-       if (startLoop)
-       {
-               /* We don't know whether or not the telnet/gdb server is running... */
-               target_call_timer_callbacks_now();
-       }
-       
-       log_add_callback(tcl_output, tclOutput);
-       retval=command_run_line_internal(active_cmd_ctx, cmd);
+       log_init();
+       LOG_DEBUG("log_init: complete");
 
-       /* we need to be able to get at the retval, so we store in a variable
-        */
-       Jim_Obj *resultvar=Jim_NewIntObj(interp, retval);
-       Jim_IncrRefCount(resultvar);
-       Jim_SetGlobalVariableStr(interp, "openocd_result", resultvar);
-       Jim_DecrRefCount(interp, resultvar);
-       
-       if (startLoop)
-       {
-               target_call_timer_callbacks_now();
+       struct command_context *cmd_ctx = command_init(openocd_startup_tcl, interp);
+
+       /* register subsystem commands */
+       typedef int (*command_registrant_t)(struct command_context *cmd_ctx_value);
+       static const command_registrant_t command_registrants[] = {
+               &openocd_register_commands,
+               &server_register_commands,
+               &gdb_register_commands,
+               &log_register_commands,
+               &rtt_server_register_commands,
+               &transport_register_commands,
+               &adapter_register_commands,
+               &target_register_commands,
+               &flash_register_commands,
+               &nand_register_commands,
+               &pld_register_commands,
+               &cti_register_commands,
+               &dap_register_commands,
+               &arm_tpiu_swo_register_commands,
+               NULL
+       };
+       for (unsigned i = 0; command_registrants[i]; i++) {
+               int retval = (*command_registrants[i])(cmd_ctx);
+               if (retval != ERROR_OK) {
+                       command_done(cmd_ctx);
+                       return NULL;
+               }
        }
-       log_remove_callback(tcl_output, tclOutput);
-       
-       Jim_SetResult(interp, tclOutput);
-       
-       return (ignore||(retval==ERROR_OK))?JIM_OK:JIM_ERR;
-}
+       LOG_DEBUG("command registration: complete");
 
-static int Jim_Command_openocd(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
-{
-       return Jim_Command_openocd_ignore(interp, argc, argv, 1); 
-}
+       LOG_OUTPUT(OPENOCD_VERSION "\n"
+               "Licensed under GNU GPL v2\n");
 
-static int Jim_Command_openocd_throw(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
-{
-       return Jim_Command_openocd_ignore(interp, argc, argv, 0); 
-}
+       global_cmd_ctx = cmd_ctx;
 
-/* find full path to file */
-static int Jim_Command_find(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
-{
-       if (argc != 2)
-               return JIM_ERR;
-       char *file = (char*)Jim_GetString(argv[1], NULL);
-       char *full_path = find_file(file);
-       if (full_path == NULL)
-               return JIM_ERR;
-       Jim_Obj *result = Jim_NewStringObj(interp, full_path, strlen(full_path));
-       free(full_path);
-       
-       Jim_SetResult(interp, result);
-       return JIM_OK;
+       return cmd_ctx;
 }
 
-static int Jim_Command_echo(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+/** OpenOCD runtime meat that can become single-thread in future. It parse
+ * commandline, reads configuration, sets up the target and starts server loop.
+ * Commandline arguments are passed into this function from openocd_main().
+ */
+static int openocd_thread(int argc, char *argv[], struct command_context *cmd_ctx)
 {
-       if (argc != 2)
-               return JIM_ERR;
-       char *str = (char*)Jim_GetString(argv[1], NULL);
-       LOG_USER("%s", str);
-       return JIM_OK;
-}
+       int ret;
 
-static size_t openocd_jim_fwrite(const void *_ptr, size_t size, size_t n, void *cookie)
-{
-       size_t nbytes;
-       const char *ptr;
+       if (parse_cmdline_args(cmd_ctx, argc, argv) != ERROR_OK)
+               return ERROR_FAIL;
 
-       /* make it a char easier to read code */
-       ptr = _ptr;
+       if (server_preinit() != ERROR_OK)
+               return ERROR_FAIL;
 
-       nbytes = size * n;
-       if (nbytes == 0) {
-               return 0;
+       ret = parse_config_file(cmd_ctx);
+       if (ret == ERROR_COMMAND_CLOSE_CONNECTION) {
+               server_quit(); /* gdb server may be initialized by -c init */
+               return ERROR_OK;
+       } else if (ret != ERROR_OK) {
+               server_quit(); /* gdb server may be initialized by -c init */
+               return ERROR_FAIL;
        }
 
-       if (!active_cmd_ctx) {
-               /* TODO: Where should this go? */               
-               return n;
-       }
+       ret = server_init(cmd_ctx);
+       if (ret != ERROR_OK)
+               return ERROR_FAIL;
 
-       /* do we have to chunk it? */
-       if (ptr[nbytes] == 0) {
-               /* no it is a C style string */
-               command_output_text(active_cmd_ctx, ptr);
-               return strlen(ptr);
-       }
-       /* GRR we must chunk - not null terminated */
-       while (nbytes) {
-               char chunk[128+1];
-               int x;
-
-               x = nbytes;
-               if (x > 128) {
-                       x = 128;
+       if (init_at_startup) {
+               ret = command_run_line(cmd_ctx, "init");
+               if (ret != ERROR_OK) {
+                       server_quit();
+                       return ERROR_FAIL;
                }
-               /* copy it */
-               memcpy(chunk, ptr, x);
-               /* terminate it */
-               chunk[n] = 0;
-               /* output it */
-               command_output_text(active_cmd_ctx, chunk);
-               ptr += x;
-               nbytes -= x;
        }
-       
-       return n;
-}
 
-static size_t openocd_jim_fread(void *ptr, size_t size, size_t n, void *cookie )
-{
-       /* TCL wants to read... tell him no */
-       return 0;
-}
+       ret = server_loop(cmd_ctx);
 
-static int openocd_jim_vfprintf(void *cookie, const char *fmt, va_list ap)
-{
-       char *cp;
-       int n;
-       
-       n = -1;
-       if (active_cmd_ctx) {
-               cp = alloc_vprintf(fmt, ap);
-               if (cp) {
-                       command_output_text(active_cmd_ctx, cp);
-                       n = strlen(cp);
-                       free(cp);
-               }
-       }
-       return n;
-}
+       int last_signal = server_quit();
+       if (last_signal != ERROR_OK)
+               return last_signal;
 
-static int openocd_jim_fflush(void *cookie)
-{
-       /* nothing to flush */
-       return 0;
+       if (ret != ERROR_OK)
+               return ERROR_FAIL;
+       return ERROR_OK;
 }
 
-static char* openocd_jim_fgets(char *s, int size, void *cookie)
+/* normally this is the main() function entry, but if OpenOCD is linked
+ * into application, then this fn will not be invoked, but rather that
+ * application will have it's own implementation of main(). */
+int openocd_main(int argc, char *argv[])
 {
-       /* not supported */
-       errno = ENOTSUP;
-       return NULL;
-}
+       int ret;
 
-void add_jim(const char *name, int (*cmd)(Jim_Interp *interp, int argc, Jim_Obj *const *argv), const char *help)
-{
-       Jim_CreateCommand(interp, name, cmd, NULL, NULL);
-       
-       /* FIX!!! it would be prettier to invoke add_help_text... 
-       accumulate help text in Tcl helptext list.  */
-    Jim_Obj *helptext=Jim_GetGlobalVariableStr(interp, "ocd_helptext", JIM_ERRMSG);
-       Jim_Obj *cmd_entry=Jim_NewListObj(interp, NULL, 0);
-       
-       Jim_Obj *cmd_list=Jim_NewListObj(interp, NULL, 0);
-       Jim_ListAppendElement(interp, cmd_list, Jim_NewStringObj(interp, name, -1));
-       
-       Jim_ListAppendElement(interp, cmd_entry, cmd_list);
-       Jim_ListAppendElement(interp, cmd_entry, Jim_NewStringObj(interp, help, -1));
-       Jim_ListAppendElement(interp, helptext, cmd_entry);
-}
+       /* initialize commandline interface */
+       struct command_context *cmd_ctx;
 
-extern const unsigned char filedata_startup[];
+       cmd_ctx = setup_command_handler(NULL);
 
-void initJim(void)
-{
-       Jim_CreateCommand(interp, "openocd", Jim_Command_openocd, NULL, NULL);
-       Jim_CreateCommand(interp, "openocd_throw", Jim_Command_openocd_throw, NULL, NULL);
-       Jim_CreateCommand(interp, "find", Jim_Command_find, NULL, NULL);
-       Jim_CreateCommand(interp, "echo", Jim_Command_echo, NULL, NULL);
-       Jim_CreateCommand(interp, "mem2array", Jim_Command_mem2array, NULL, NULL );
-       Jim_CreateCommand(interp, "array2mem", Jim_Command_array2mem, NULL, NULL );
-
-       /* Set Jim's STDIO */
-       interp->cookie_stdin = NULL;
-       interp->cookie_stdout = NULL;
-       interp->cookie_stderr = NULL;
-       interp->cb_fwrite = openocd_jim_fwrite;
-       interp->cb_fread = openocd_jim_fread ;
-       interp->cb_vfprintf = openocd_jim_vfprintf;
-       interp->cb_fflush = openocd_jim_fflush;
-       interp->cb_fgets = openocd_jim_fgets;
-       
-       add_default_dirs();
-       
-       if (Jim_Eval(interp, filedata_startup)==JIM_ERR)
-       {
-               LOG_ERROR("Failed to run startup.tcl (embedded into OpenOCD compile time)");
-               Jim_PrintErrorMessage(interp);
-               exit(-1);
-       }
-}
+       if (util_init(cmd_ctx) != ERROR_OK)
+               return EXIT_FAILURE;
 
+       if (rtt_init() != ERROR_OK)
+               return EXIT_FAILURE;
 
+       LOG_OUTPUT("For bug reports, read\n\t"
+               "http://openocd.org/doc/doxygen/bugs.html"
+               "\n");
 
-int handle_script_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
-{
-       FILE *script_file;
+       command_context_mode(cmd_ctx, COMMAND_CONFIG);
+       command_set_output_handler(cmd_ctx, configuration_output_handler, NULL);
 
-       if (argc != 1)
-               return ERROR_COMMAND_SYNTAX_ERROR;
+       server_host_os_entry();
 
-       
-       /* Run a tcl script file */
-       return command_run_linef(cmd_ctx, "source [find {%s}]", args[0]);
-}
+       /* Start the executable meat that can evolve into thread in future. */
+       ret = openocd_thread(argc, argv, cmd_ctx);
 
-command_context_t *setup_command_handler(void)
-{
-       command_context_t *cmd_ctx;
-       
-       cmd_ctx = command_init();
-       
-       register_command(cmd_ctx, NULL, "version", handle_version_command,
-                                        COMMAND_EXEC, "show OpenOCD version");
-       register_command(cmd_ctx, NULL, "daemon_startup", handle_daemon_startup_command, COMMAND_CONFIG, 
-                       "deprecated - use \"init\" and \"reset\" at end of startup script instead");
-       
-       /* register subsystem commands */
-       server_register_commands(cmd_ctx);
-       telnet_register_commands(cmd_ctx);
-       gdb_register_commands(cmd_ctx);
-       tcl_register_commands(cmd_ctx); /* tcl server commands */
-       log_register_commands(cmd_ctx);
-       jtag_register_commands(cmd_ctx);
-       register_command(cmd_ctx, NULL, "script", handle_script_command, COMMAND_ANY, "execute commands from <file>");
-       xsvf_register_commands(cmd_ctx);
-       target_register_commands(cmd_ctx);
-       flash_register_commands(cmd_ctx);
-       nand_register_commands(cmd_ctx);
-       pld_register_commands(cmd_ctx);
-       
-       if (log_init(cmd_ctx) != ERROR_OK)
-       {
-               exit(-1);
-       }
-       LOG_DEBUG("log init complete");
+       flash_free_all_banks();
+       gdb_service_free();
+       arm_tpiu_swo_cleanup_all();
+       server_free();
 
-       LOG_OUTPUT( OPENOCD_VERSION "\n" );
-       
-       
-       register_command(cmd_ctx, NULL, "init", handle_init_command,
-                                        COMMAND_ANY, "initializes target and servers - nop on subsequent invocations");
+       unregister_all_commands(cmd_ctx, NULL);
+       help_del_all_commands(cmd_ctx);
 
-       return cmd_ctx;
-}
+       /* free all DAP and CTI objects */
+       arm_cti_cleanup_all();
+       dap_cleanup_all();
 
-/* normally this is the main() function entry, but if OpenOCD is linked
- * into application, then this fn will not be invoked, but rather that
- * application will have it's own implementation of main(). */
-int openocd_main(int argc, char *argv[])
-{
-#ifdef JIM_EMBEDDED
-       Jim_InitEmbedded();
-       /* Create an interpreter */
-       interp = Jim_CreateInterp();
-       /* Add all the Jim core commands */
-       Jim_RegisterCoreCommands(interp);
-#endif
-       
-       initJim();
-       
-       /* initialize commandline interface */
-       command_context_t *cmd_ctx;
-       cmd_ctx=setup_command_handler();
-       
-       /* DANGER!!! make sure that the line below does not appear in a patch, do not remove */
-       /* DANGER!!! make sure that the line below does not appear in a patch, do not remove */
-       /* DANGER!!! make sure that the line below does not appear in a patch, do not remove */
-       /* DANGER!!! make sure that the line below does not appear in a patch, do not remove */
-       /* DANGER!!! make sure that the line below does not appear in a patch, do not remove */
-       LOG_OUTPUT( "$URL$\n");
-       /* DANGER!!! make sure that the line above does not appear in a patch, do not remove */
-       /* DANGER!!! make sure that the line above does not appear in a patch, do not remove */
-       /* DANGER!!! make sure that the line above does not appear in a patch, do not remove */
-       /* DANGER!!! make sure that the line above does not appear in a patch, do not remove */
-       /* DANGER!!! make sure that the line above does not appear in a patch, do not remove */
-
-       command_context_t *cfg_cmd_ctx;
-       cfg_cmd_ctx = copy_command_context(cmd_ctx);
-       cfg_cmd_ctx->mode = COMMAND_CONFIG;
-       command_set_output_handler(cfg_cmd_ctx, configuration_output_handler, NULL);
-       
-       active_cmd_ctx=cfg_cmd_ctx;
-       
-
-       if (parse_cmdline_args(cfg_cmd_ctx, argc, argv) != ERROR_OK)
-               return EXIT_FAILURE;
-       
-       if (parse_config_file(cfg_cmd_ctx) != ERROR_OK)
-               return EXIT_FAILURE;
-       
-       active_cmd_ctx=cmd_ctx;
-       
-       command_done(cfg_cmd_ctx);
+       adapter_quit();
 
-       if (command_run_line(cmd_ctx, "init")!=ERROR_OK)
-               return EXIT_FAILURE;
-       
-       if (daemon_startup)
-               command_run_line(cmd_ctx, "reset");
-       
-       startLoop=1;
+       server_host_os_close();
 
-       /* handle network connections */
-       server_loop(cmd_ctx);
+       /* Shutdown commandline interface */
+       command_exit(cmd_ctx);
 
-       /* shut server down */
-       server_quit();
+       rtt_exit();
+       free_config();
 
-       unregister_all_commands(cmd_ctx);
-       
-       /* free commandline interface */
-       command_done(cmd_ctx);
+       log_exit();
+
+       if (ret == ERROR_FAIL)
+               return EXIT_FAILURE;
+       else if (ret != ERROR_OK)
+               exit_on_signal(ret);
 
-       return EXIT_SUCCESS;
+       return ret;
 }

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