openocd.c 18.6 KB
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/***************************************************************************
 *   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.                          *
 *                                                                         *
 *   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.             *
 ***************************************************************************/

#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 "interpreter.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"
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#include "tcl_server.h"
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#include <sys/time.h>
#include <sys/types.h>
#include <strings.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>

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#ifdef _WIN32
#include <malloc.h>
#else
#include <alloca.h>
#endif

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#ifdef __ECOS
/* Jim is provied by eCos */
#include <cyg/jimtcl/jim.h>
#else
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#define JIM_EMBEDDED
#include "jim.h"
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#endif

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#include "replacements.h"
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int launchTarget(struct command_context_s *cmd_ctx)
{
	int retval;
	/* Try to examine & validate jtag chain, though this may require a reset first
	 * in which case we continue setup */
	jtag_init(cmd_ctx);

	/* try to examine target at this point. If it fails, perhaps a reset will
	 * bring it up later on via a telnet/gdb session */
	target_examine(cmd_ctx);
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	retval=flash_init_drivers(cmd_ctx);
	if (retval!=ERROR_OK)
		return retval;
	LOG_DEBUG("flash init complete");

	retval=nand_init(cmd_ctx);
	if (retval!=ERROR_OK)
		return retval;
	LOG_DEBUG("NAND init complete");

	retval=pld_init(cmd_ctx);
	if (retval!=ERROR_OK)
		return retval;
	LOG_DEBUG("pld init complete");
	return retval;
}
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/* 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)
{
	command_print(cmd_ctx, OPENOCD_VERSION);

	return ERROR_OK;
}

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static int daemon_startup = 0;

int handle_daemon_startup_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
	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);

	return ERROR_OK;
}

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void exit_handler(void)
{
	/* close JTAG interface */
	if (jtag && jtag->quit)
		jtag->quit();
}

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/* 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)
{
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	int retval;
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	static int initialized=0;
	if (initialized)
		return ERROR_OK;
	
	initialized=1;
	
	command_set_output_handler(cmd_ctx, configuration_output_handler, NULL);

	atexit(exit_handler);
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	if (target_init(cmd_ctx) != ERROR_OK)
		return ERROR_FAIL;
	LOG_DEBUG("target init complete");

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	if ((retval=jtag_interface_init(cmd_ctx)) != ERROR_OK)
	{
		/* we must be able to set up the jtag interface */
		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");
		}
	}
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	if (flash_init_drivers(cmd_ctx) != ERROR_OK)
		return ERROR_FAIL;
	LOG_DEBUG("flash init complete");

	if (nand_init(cmd_ctx) != ERROR_OK)
		return ERROR_FAIL;
	LOG_DEBUG("NAND init complete");

	if (pld_init(cmd_ctx) != 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();
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	tcl_init(); /* allows tcl to just connect without going thru telnet */
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	return ERROR_OK;
}

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void lockBigLock();
void unlockBigLock();
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Jim_Interp *interp;
command_context_t *active_cmd_ctx;

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static int new_int_array_element(Jim_Interp * interp, const char *varname, int idx, u32 val)
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{
	char *namebuf;
	Jim_Obj *nameObjPtr, *valObjPtr;
	int result;

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	namebuf = alloc_printf("%s(%d)", varname, idx );
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    nameObjPtr = Jim_NewStringObj(interp, namebuf, -1);
    valObjPtr = Jim_NewIntObj(interp, val );
    Jim_IncrRefCount(nameObjPtr);
    Jim_IncrRefCount(valObjPtr);
    result = Jim_SetVariable(interp, nameObjPtr, valObjPtr);
    Jim_DecrRefCount(interp, nameObjPtr);
    Jim_DecrRefCount(interp, valObjPtr);
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    free(namebuf);
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	// printf( "%s = 0%08x\n", namebuf, val );
    return result;
}

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static int Jim_Command_mem2array(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
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{
	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] = length in bytes 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 */

	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;
	}

	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));

	return JIM_OK;
}

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static void tcl_output(void *privData, const char *file, int line, const char *function, const char *string)
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{		
	Jim_Obj *tclOutput=(Jim_Obj *)privData;

	Jim_AppendString(interp, tclOutput, string, strlen(string));
}

/* 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. 

 */
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int jim_command(command_context_t *context, char *line)
{
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	int retval=ERROR_OK;
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	/* FIX!!!! in reality there is only one cmd_ctx handler, but consider
	what might happen here if there are multiple handlers w/reentrant callback
	fn's... shudder!  */
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	active_cmd_ctx=context;
	int retcode=Jim_Eval(interp, line);
	
	const char *result;
	int reslen;
    result = Jim_GetString(Jim_GetResult(interp), &reslen);
    if (retcode == JIM_ERR) {
	    int len, i;
	
	    LOG_USER_N("Runtime error, file \"%s\", line %d:" JIM_NL,
	            interp->errorFileName, interp->errorLine);
	    LOG_USER_N("    %s" JIM_NL,
	            Jim_GetString(interp->result, NULL));
	    Jim_ListLength(interp, interp->stackTrace, &len);
	    for (i = 0; i < len; i+= 3) {
	        Jim_Obj *objPtr;
	        const char *proc, *file, *line;
	
	        Jim_ListIndex(interp, interp->stackTrace, i, &objPtr, JIM_NONE);
	        proc = Jim_GetString(objPtr, NULL);
	        Jim_ListIndex(interp, interp->stackTrace, i+1, &objPtr,
	                JIM_NONE);
	        file = Jim_GetString(objPtr, NULL);
	        Jim_ListIndex(interp, interp->stackTrace, i+2, &objPtr,
	                JIM_NONE);
	        line = Jim_GetString(objPtr, NULL);
	        LOG_USER_N("In procedure '%s' called at file \"%s\", line %s" JIM_NL,
	                proc, file, line);
	    }
    } else 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, chunk);
        		buff[chunk]=0; 
            	LOG_USER_N("%s", buff);
        	}
        	LOG_USER_N("%s", "\n");
        }
    }
	return retval;
}

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int startLoop=0;
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static int Jim_Command_openocd_ignore(Jim_Interp *interp, int argc, Jim_Obj *const *argv, int ignore)
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{
	int retval;
    char *cmd = (char*)Jim_GetString(argv[1], NULL);

	lockBigLock();
	
    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);
    
    if (startLoop)
    {
    	target_call_timer_callbacks_now();
    }
	log_remove_callback(tcl_output, tclOutput);
    
	Jim_SetResult(interp, tclOutput);
    unlockBigLock();
        
    return (ignore||(retval==ERROR_OK))?JIM_OK:JIM_ERR;
}

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static int Jim_Command_openocd(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
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{
	return Jim_Command_openocd_ignore(interp, argc, argv, 1); 
}

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static int Jim_Command_openocd_throw(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
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{
	return Jim_Command_openocd_ignore(interp, argc, argv, 0); 
}

/* find full path to file */
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static int Jim_Command_find(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
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{
	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;
}

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static int Jim_Command_echo(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
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{
	if (argc!=2)
		return JIM_ERR;
	char *str = (char*)Jim_GetString(argv[1], NULL);
	LOG_USER("%s", str);
	return JIM_OK;
}
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static size_t openocd_jim_fwrite(const void *_ptr, size_t size, size_t n, void *cookie)
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{
	size_t nbytes;
	const char *ptr;

	/* make it a char easier to read code */
	ptr = _ptr;

	nbytes = size * n;
	if( nbytes == 0 ){
		return 0;
	}

	if( !active_cmd_ctx ){
		/* FIXME: Where should this go? */		
		return n;
	}

	/* do we have to chunk it? */
	if( ptr[ nbytes ] == 0 ){
		/* no it is a C style string */
		command_output_text( active_cmd_ctx, ptr );
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		return strlen(ptr);
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	}
	/* GRR we must chunk - not null terminated */
	while( nbytes ){
		char chunk[128+1];
		int x;

		x = nbytes;
		if( x > 128 ){
			x = 128;
		}
		/* 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;
}

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static size_t openocd_jim_fread(void *ptr, size_t size, size_t n, void *cookie )
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{
	/* TCL wants to read... tell him no */
	return 0;
}

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static int openocd_jim_vfprintf(void *cookie, const char *fmt, va_list ap)
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{
	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;
}

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static int openocd_jim_fflush(void *cookie)
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{
	/* nothing to flush */
	return 0;
}

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static char* openocd_jim_fgets(char *s, int size, void *cookie)
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{
	/* not supported */
	errno = ENOTSUP;
	return NULL;
}

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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);
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    Jim_CreateCommand(interp, "echo", Jim_Command_echo, NULL, NULL);
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    Jim_CreateCommand(interp, "mem2array", Jim_Command_mem2array, 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;
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}
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/* after command line parsing */
void initJim2(void)
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{
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	Jim_Eval(interp, "source [find tcl/commands.tcl]");
}

command_context_t *setup_command_handler()
{
	command_context_t *cmd_ctx;
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	cmd_ctx = command_init();

	register_command(cmd_ctx, NULL, "version", handle_version_command,
					 COMMAND_EXEC, "show OpenOCD version");
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	register_command(cmd_ctx, NULL, "daemon_startup", handle_daemon_startup_command, COMMAND_CONFIG, 
			"deprecated - use \"init\" and \"reset\" at end of startup script instead");
	
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	/* register subsystem commands */
	server_register_commands(cmd_ctx);
	telnet_register_commands(cmd_ctx);
	gdb_register_commands(cmd_ctx);
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	tcl_register_commands(cmd_ctx); /* tcl server commands */
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	log_register_commands(cmd_ctx);
	jtag_register_commands(cmd_ctx);
	interpreter_register_commands(cmd_ctx);
	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)
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	{
		exit(-1);
	}
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	LOG_DEBUG("log init complete");
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	LOG_OUTPUT( OPENOCD_VERSION "\n" );
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	/* 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 */
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	LOG_OUTPUT( "$URL$\n");
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	/* 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 */
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	register_command(cmd_ctx, NULL, "init", handle_init_command,
					 COMMAND_ANY, "initializes target and servers - nop on subsequent invocations");

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	return cmd_ctx;
}

/*
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();
	
	command_context_t *cfg_cmd_ctx;
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	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);
	
	if (parse_cmdline_args(cfg_cmd_ctx, argc, argv) != ERROR_OK)
		return EXIT_FAILURE;

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	initJim2();
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	if (parse_config_file(cfg_cmd_ctx) != ERROR_OK)
		return EXIT_FAILURE;
	
	command_done(cfg_cmd_ctx);

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	if (command_run_line(cmd_ctx, "init")!=ERROR_OK)
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		return EXIT_FAILURE;
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	if (daemon_startup)
		command_run_line(cmd_ctx, "reset");
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	startLoop=1;

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	/* handle network connections */
	server_loop(cmd_ctx);

	/* shut server down */
	server_quit();

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	unregister_all_commands(cmd_ctx);
	
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	/* free commandline interface */
	command_done(cmd_ctx);

	return EXIT_SUCCESS;
}