[people/ms/u-boot.git] / cmd / bedbug.c

/*
 * BedBug Functions
 */

#include <common.h>
#include <cli.h>
#include <command.h>
#include <console.h>
#include <linux/ctype.h>
#include <net.h>
#include <bedbug/type.h>
#include <bedbug/bedbug.h>
#include <bedbug/regs.h>
#include <bedbug/ppc.h>

DECLARE_GLOBAL_DATA_PTR;

extern void show_regs __P ((struct pt_regs *));
extern int run_command __P ((const char *, int));

ulong dis_last_addr = 0;	/* Last address disassembled   */
ulong dis_last_len = 20;	/* Default disassembler length */
CPU_DEBUG_CTX bug_ctx;		/* Bedbug context structure    */


/* ======================================================================
 * U-Boot's puts function does not append a newline, so the bedbug stuff
 * will use this for the output of the dis/assembler.
 * ====================================================================== */

int bedbug_puts (const char *str)
{
	/* -------------------------------------------------- */

	printf ("%s\r\n", str);
	return 0;
}				/* bedbug_puts */


/* ======================================================================
 * Initialize the bug_ctx structure used by the bedbug debugger.  This is
 * specific to the CPU since each has different debug registers and
 * settings.
 * ====================================================================== */

void bedbug_init (void)
{
	/* -------------------------------------------------- */
	return;
}				/* bedbug_init */


/* ======================================================================
 * Entry point from the interpreter to the disassembler.  Repeated calls
 * will resume from the last disassembled address.
 * ====================================================================== */
int do_bedbug_dis (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
	ulong addr;		/* Address to start disassembly from    */
	ulong len;		/* # of instructions to disassemble     */

	/* -------------------------------------------------- */

	/* Setup to go from the last address if none is given */
	addr = dis_last_addr;
	len = dis_last_len;

	if (argc < 2)
		return CMD_RET_USAGE;

	if ((flag & CMD_FLAG_REPEAT) == 0) {
		/* New command */
		addr = simple_strtoul (argv[1], NULL, 16);

		/* If an extra param is given then it is the length */
		if (argc > 2)
			len = simple_strtoul (argv[2], NULL, 16);
	}

	/* Run the disassembler */
	disppc ((unsigned char *) addr, 0, len, bedbug_puts, F_RADHEX);

	dis_last_addr = addr + (len * 4);
	dis_last_len = len;
	return 0;
}				/* do_bedbug_dis */

U_BOOT_CMD (ds, 3, 1, do_bedbug_dis,
	    "disassemble memory",
	    "ds <address> [# instructions]");

/* ======================================================================
 * Entry point from the interpreter to the assembler.  Assembles
 * instructions in consecutive memory locations until a '.' (period) is
 * entered on a line by itself.
 * ====================================================================== */
int do_bedbug_asm (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
	long mem_addr;		/* Address to assemble into     */
	unsigned long instr;	/* Machine code for text        */
	char prompt[15];	/* Prompt string for user input */
	int asm_err;		/* Error code from the assembler */

	/* -------------------------------------------------- */
	int rcode = 0;

	if (argc < 2)
		return CMD_RET_USAGE;

	printf ("\nEnter '.' when done\n");
	mem_addr = simple_strtoul (argv[1], NULL, 16);

	while (1) {
		putc ('\n');
		disppc ((unsigned char *) mem_addr, 0, 1, bedbug_puts,
			F_RADHEX);

		sprintf (prompt, "%08lx:    ", mem_addr);
		cli_readline(prompt);

		if (console_buffer[0] && strcmp (console_buffer, ".")) {
			if ((instr =
			     asmppc (mem_addr, console_buffer,
				     &asm_err)) != 0) {
				*(unsigned long *) mem_addr = instr;
				mem_addr += 4;
			} else {
				printf ("*** Error: %s ***\n",
					asm_error_str (asm_err));
				rcode = 1;
			}
		} else {
			break;
		}
	}
	return rcode;
}				/* do_bedbug_asm */

U_BOOT_CMD (as, 2, 0, do_bedbug_asm,
	    "assemble memory", "as <address>");

/* ======================================================================
 * Used to set a break point from the interpreter.  Simply calls into the
 * CPU-specific break point set routine.
 * ====================================================================== */

int do_bedbug_break (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
	/* -------------------------------------------------- */
	if (bug_ctx.do_break)
		(*bug_ctx.do_break) (cmdtp, flag, argc, argv);
	return 0;

}				/* do_bedbug_break */

U_BOOT_CMD (break, 3, 0, do_bedbug_break,
	    "set or clear a breakpoint",
	    " - Set or clear a breakpoint\n"
	    "break <address> - Break at an address\n"
	    "break off <bp#> - Disable breakpoint.\n"
	    "break show      - List breakpoints.");

/* ======================================================================
 * Called from the debug interrupt routine.  Simply calls the CPU-specific
 * breakpoint handling routine.
 * ====================================================================== */

void do_bedbug_breakpoint (struct pt_regs *regs)
{
	/* -------------------------------------------------- */

	if (bug_ctx.break_isr)
		(*bug_ctx.break_isr) (regs);

	return;
}				/* do_bedbug_breakpoint */


/* ======================================================================
 * Called from the CPU-specific breakpoint handling routine.  Enter a
 * mini main loop until the stopped flag is cleared from the breakpoint
 * context.
 *
 * This handles the parts of the debugger that are common to all CPU's.
 * ====================================================================== */

void bedbug_main_loop (unsigned long addr, struct pt_regs *regs)
{
	int len;		/* Length of command line */
	int flag;		/* Command flags          */
	int rc = 0;		/* Result from run_command */
	char prompt_str[20];	/* Prompt string          */
	static char lastcommand[CONFIG_SYS_CBSIZE] = { 0 };	/* previous command */
	/* -------------------------------------------------- */

	if (bug_ctx.clear)
		(*bug_ctx.clear) (bug_ctx.current_bp);

	printf ("Breakpoint %d: ", bug_ctx.current_bp);
	disppc ((unsigned char *) addr, 0, 1, bedbug_puts, F_RADHEX);

	bug_ctx.stopped = 1;
	bug_ctx.regs = regs;

	sprintf (prompt_str, "BEDBUG.%d =>", bug_ctx.current_bp);

	/* A miniature main loop */
	while (bug_ctx.stopped) {
		len = cli_readline(prompt_str);

		flag = 0;	/* assume no special flags for now */

		if (len > 0)
			strcpy (lastcommand, console_buffer);
		else if (len == 0)
			flag |= CMD_FLAG_REPEAT;

		if (len == -1)
			printf ("<INTERRUPT>\n");
		else
			rc = run_command_repeatable(lastcommand, flag);

		if (rc <= 0) {
			/* invalid command or not repeatable, forget it */
			lastcommand[0] = 0;
		}
	}

	bug_ctx.regs = NULL;
	bug_ctx.current_bp = 0;

	return;
}				/* bedbug_main_loop */


/* ======================================================================
 * Interpreter command to continue from a breakpoint.  Just clears the
 * stopped flag in the context so that the breakpoint routine will
 * return.
 * ====================================================================== */
int do_bedbug_continue (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
	/* -------------------------------------------------- */

	if (!bug_ctx.stopped) {
		printf ("Not at a breakpoint\n");
		return 1;
	}

	bug_ctx.stopped = 0;
	return 0;
}				/* do_bedbug_continue */

U_BOOT_CMD (continue, 1, 0, do_bedbug_continue,
	    "continue from a breakpoint",
	    "");

/* ======================================================================
 * Interpreter command to continue to the next instruction, stepping into
 * subroutines.  Works by calling the find_next_addr() routine to compute
 * the address passes control to the CPU-specific set breakpoint routine
 * for the current breakpoint number.
 * ====================================================================== */
int do_bedbug_step (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
	unsigned long addr;	/* Address to stop at */

	/* -------------------------------------------------- */

	if (!bug_ctx.stopped) {
		printf ("Not at a breakpoint\n");
		return 1;
	}

	if (!find_next_address((unsigned char *) &addr, false, bug_ctx.regs))
		return 1;

	if (bug_ctx.set)
		(*bug_ctx.set) (bug_ctx.current_bp, addr);

	bug_ctx.stopped = 0;
	return 0;
}				/* do_bedbug_step */

U_BOOT_CMD (step, 1, 1, do_bedbug_step,
	    "single step execution.",
	    "");

/* ======================================================================
 * Interpreter command to continue to the next instruction, stepping over
 * subroutines.  Works by calling the find_next_addr() routine to compute
 * the address passes control to the CPU-specific set breakpoint routine
 * for the current breakpoint number.
 * ====================================================================== */
int do_bedbug_next (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
	unsigned long addr;	/* Address to stop at */

	/* -------------------------------------------------- */

	if (!bug_ctx.stopped) {
		printf ("Not at a breakpoint\n");
		return 1;
	}

	if (!find_next_address((unsigned char *) &addr, true, bug_ctx.regs))
		return 1;

	if (bug_ctx.set)
		(*bug_ctx.set) (bug_ctx.current_bp, addr);

	bug_ctx.stopped = 0;
	return 0;
}				/* do_bedbug_next */

U_BOOT_CMD (next, 1, 1, do_bedbug_next,
	    "single step execution, stepping over subroutines.",
	    "");

/* ======================================================================
 * Interpreter command to print the current stack.  This assumes an EABI
 * architecture, so it starts with GPR R1 and works back up the stack.
 * ====================================================================== */
int do_bedbug_stack (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
	unsigned long sp;	/* Stack pointer                */
	unsigned long func;	/* LR from stack                */
	int depth;		/* Stack iteration level        */
	int skip = 1;		/* Flag to skip the first entry */
	unsigned long top;	/* Top of memory address        */

	/* -------------------------------------------------- */

	if (!bug_ctx.stopped) {
		printf ("Not at a breakpoint\n");
		return 1;
	}

	top = gd->bd->bi_memstart + gd->bd->bi_memsize;
	depth = 0;

	printf ("Depth     PC\n");
	printf ("-----  --------\n");
	printf ("%5d  %08lx\n", depth++, bug_ctx.regs->nip);

	sp = bug_ctx.regs->gpr[1];
	func = *(unsigned long *) (sp + 4);

	while ((func < top) && (sp < top)) {
		if (!skip)
			printf ("%5d  %08lx\n", depth++, func);
		else
			--skip;

		sp = *(unsigned long *) sp;
		func = *(unsigned long *) (sp + 4);
	}
	return 0;
}				/* do_bedbug_stack */

U_BOOT_CMD (where, 1, 1, do_bedbug_stack,
	    "Print the running stack.",
	    "");

/* ======================================================================
 * Interpreter command to dump the registers.  Calls the CPU-specific
 * show registers routine.
 * ====================================================================== */
int do_bedbug_rdump (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
	/* -------------------------------------------------- */

	if (!bug_ctx.stopped) {
		printf ("Not at a breakpoint\n");
		return 1;
	}

	show_regs (bug_ctx.regs);
	return 0;
}				/* do_bedbug_rdump */

U_BOOT_CMD (rdump, 1, 1, do_bedbug_rdump,
	    "Show registers.", "");
/* ====================================================================== */


/*
 * Copyright (c) 2001 William L. Pitts
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are freely
 * permitted provided that the above copyright notice and this
 * paragraph and the following disclaimer are duplicated in all
 * such forms.
 *
 * This software is provided "AS IS" and without any express or
 * implied warranties, including, without limitation, the implied
 * warranties of merchantability and fitness for a particular
 * purpose.
 */
Commit	Line	Data
47d1a6e1 WD	1	/*
	2	* BedBug Functions
	3	*/
	4
	5	#include <common.h>
18d66533	6	#include <cli.h>
47d1a6e1	7	#include <command.h>
24b852a7	8	#include <console.h>
47d1a6e1 WD	9	#include <linux/ctype.h>
47d1a6e1 WD	10	#include <net.h>
8bde7f77	11	#include <bedbug/type.h>
47d1a6e1 WD	12	#include <bedbug/bedbug.h>
	13	#include <bedbug/regs.h>
	14	#include <bedbug/ppc.h>
47d1a6e1	15
d87080b7 WD	16	DECLARE_GLOBAL_DATA_PTR;
d87080b7 WD	17
d87080b7 WD	18	extern void show_regs __P ((struct pt_regs *));
d87080b7 WD	19	extern int run_command __P ((const char *, int));
47d1a6e1	20
d87080b7 WD	21	ulong dis_last_addr = 0; /* Last address disassembled */
	22	ulong dis_last_len = 20; /* Default disassembler length */
	23	CPU_DEBUG_CTX bug_ctx; /* Bedbug context structure */
e1bf824d	24
d87080b7	25
47d1a6e1 WD	26	/* ======================================================================
	27	* U-Boot's puts function does not append a newline, so the bedbug stuff
	28	* will use this for the output of the dis/assembler.
	29	* ====================================================================== */
	30
d87080b7	31	int bedbug_puts (const char *str)
47d1a6e1	32	{
d87080b7	33	/* -------------------------------------------------- */
47d1a6e1	34
d87080b7 WD	35	printf ("%s\r\n", str);
	36	return 0;
	37	} /* bedbug_puts */
e1bf824d	38
47d1a6e1 WD	39
47d1a6e1 WD	40
47d1a6e1 WD	41	/* ======================================================================
	42	* Initialize the bug_ctx structure used by the bedbug debugger. This is
	43	* specific to the CPU since each has different debug registers and
	44	* settings.
	45	* ====================================================================== */
	46
d87080b7	47	void bedbug_init (void)
47d1a6e1	48	{
d87080b7	49	/* -------------------------------------------------- */
d87080b7 WD	50	return;
d87080b7 WD	51	} /* bedbug_init */
e1bf824d	52
47d1a6e1 WD	53
47d1a6e1 WD	54
47d1a6e1 WD	55	/* ======================================================================
	56	* Entry point from the interpreter to the disassembler. Repeated calls
	57	* will resume from the last disassembled address.
	58	* ====================================================================== */
54841ab5	59	int do_bedbug_dis (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
47d1a6e1	60	{
d87080b7 WD	61	ulong addr; /* Address to start disassembly from */
	62	ulong len; /* # of instructions to disassemble */
	63
	64	/* -------------------------------------------------- */
	65
	66	/* Setup to go from the last address if none is given */
	67	addr = dis_last_addr;
	68	len = dis_last_len;
	69
47e26b1b	70	if (argc < 2)
4c12eeb8	71	return CMD_RET_USAGE;
d87080b7 WD	72
	73	if ((flag & CMD_FLAG_REPEAT) == 0) {
	74	/* New command */
	75	addr = simple_strtoul (argv[1], NULL, 16);
	76
	77	/* If an extra param is given then it is the length */
	78	if (argc > 2)
	79	len = simple_strtoul (argv[2], NULL, 16);
	80	}
	81
	82	/* Run the disassembler */
	83	disppc ((unsigned char *) addr, 0, len, bedbug_puts, F_RADHEX);
	84
	85	dis_last_addr = addr + (len * 4);
	86	dis_last_len = len;
	87	return 0;
	88	} /* do_bedbug_dis */
	89
	90	U_BOOT_CMD (ds, 3, 1, do_bedbug_dis,
2fb2604d	91	"disassemble memory",
a89c33db	92	"ds <address> [# instructions]");
e1bf824d	93
47d1a6e1 WD	94	/* ======================================================================
	95	* Entry point from the interpreter to the assembler. Assembles
	96	* instructions in consecutive memory locations until a '.' (period) is
	97	* entered on a line by itself.
	98	* ====================================================================== */
54841ab5	99	int do_bedbug_asm (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
47d1a6e1	100	{
d87080b7 WD	101	long mem_addr; /* Address to assemble into */
	102	unsigned long instr; /* Machine code for text */
	103	char prompt[15]; /* Prompt string for user input */
	104	int asm_err; /* Error code from the assembler */
	105
	106	/* -------------------------------------------------- */
	107	int rcode = 0;
	108
47e26b1b	109	if (argc < 2)
4c12eeb8	110	return CMD_RET_USAGE;
d87080b7 WD	111
	112	printf ("\nEnter '.' when done\n");
	113	mem_addr = simple_strtoul (argv[1], NULL, 16);
	114
	115	while (1) {
	116	putc ('\n');
	117	disppc ((unsigned char *) mem_addr, 0, 1, bedbug_puts,
	118	F_RADHEX);
	119
	120	sprintf (prompt, "%08lx: ", mem_addr);
e1bf824d	121	cli_readline(prompt);
d87080b7 WD	122
	123	if (console_buffer[0] && strcmp (console_buffer, ".")) {
	124	if ((instr =
	125	asmppc (mem_addr, console_buffer,
	126	&asm_err)) != 0) {
	127	(unsigned long ) mem_addr = instr;
	128	mem_addr += 4;
	129	} else {
	130	printf ("* Error: %s *\n",
	131	asm_error_str (asm_err));
	132	rcode = 1;
	133	}
	134	} else {
	135	break;
	136	}
	137	}
	138	return rcode;
	139	} /* do_bedbug_asm */
	140
	141	U_BOOT_CMD (as, 2, 0, do_bedbug_asm,
a89c33db	142	"assemble memory", "as <address>");
e1bf824d	143
47d1a6e1 WD	144	/* ======================================================================
	145	* Used to set a break point from the interpreter. Simply calls into the
	146	* CPU-specific break point set routine.
	147	* ====================================================================== */
	148
54841ab5	149	int do_bedbug_break (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
47d1a6e1	150	{
d87080b7 WD	151	/* -------------------------------------------------- */
	152	if (bug_ctx.do_break)
	153	(*bug_ctx.do_break) (cmdtp, flag, argc, argv);
	154	return 0;
	155
	156	} /* do_bedbug_break */
	157
	158	U_BOOT_CMD (break, 3, 0, do_bedbug_break,
2fb2604d	159	"set or clear a breakpoint",
d87080b7 WD	160	" - Set or clear a breakpoint\n"
	161	"break <address> - Break at an address\n"
	162	"break off <bp#> - Disable breakpoint.\n"
a89c33db	163	"break show - List breakpoints.");
e1bf824d	164
47d1a6e1 WD	165	/* ======================================================================
	166	* Called from the debug interrupt routine. Simply calls the CPU-specific
	167	* breakpoint handling routine.
	168	* ====================================================================== */
	169
	170	void do_bedbug_breakpoint (struct pt_regs *regs)
	171	{
d87080b7	172	/* -------------------------------------------------- */
47d1a6e1	173
d87080b7 WD	174	if (bug_ctx.break_isr)
d87080b7 WD	175	(*bug_ctx.break_isr) (regs);
47d1a6e1	176
d87080b7 WD	177	return;
d87080b7 WD	178	} /* do_bedbug_breakpoint */
e1bf824d	179
47d1a6e1 WD	180
47d1a6e1 WD	181
47d1a6e1 WD	182	/* ======================================================================
	183	* Called from the CPU-specific breakpoint handling routine. Enter a
	184	* mini main loop until the stopped flag is cleared from the breakpoint
	185	* context.
	186	*
	187	* This handles the parts of the debugger that are common to all CPU's.
	188	* ====================================================================== */
	189
d87080b7	190	void bedbug_main_loop (unsigned long addr, struct pt_regs *regs)
47d1a6e1	191	{
d87080b7 WD	192	int len; /* Length of command line */
	193	int flag; /* Command flags */
	194	int rc = 0; /* Result from run_command */
	195	char prompt_str[20]; /* Prompt string */
6d0f6bcf	196	static char lastcommand[CONFIG_SYS_CBSIZE] = { 0 }; /* previous command */
d87080b7	197	/* -------------------------------------------------- */
47d1a6e1	198
d87080b7 WD	199	if (bug_ctx.clear)
d87080b7 WD	200	(*bug_ctx.clear) (bug_ctx.current_bp);
47d1a6e1	201
d87080b7 WD	202	printf ("Breakpoint %d: ", bug_ctx.current_bp);
d87080b7 WD	203	disppc ((unsigned char *) addr, 0, 1, bedbug_puts, F_RADHEX);
47d1a6e1	204
d87080b7 WD	205	bug_ctx.stopped = 1;
d87080b7 WD	206	bug_ctx.regs = regs;
47d1a6e1	207
d87080b7	208	sprintf (prompt_str, "BEDBUG.%d =>", bug_ctx.current_bp);
47d1a6e1	209
d87080b7 WD	210	/* A miniature main loop */
d87080b7 WD	211	while (bug_ctx.stopped) {
e1bf824d	212	len = cli_readline(prompt_str);
47d1a6e1	213
d87080b7	214	flag = 0; /* assume no special flags for now */
47d1a6e1	215
d87080b7 WD	216	if (len > 0)
	217	strcpy (lastcommand, console_buffer);
	218	else if (len == 0)
	219	flag \|= CMD_FLAG_REPEAT;
47d1a6e1	220
d87080b7 WD	221	if (len == -1)
	222	printf ("<INTERRUPT>\n");
	223	else
52715f89	224	rc = run_command_repeatable(lastcommand, flag);
47d1a6e1	225
d87080b7 WD	226	if (rc <= 0) {
	227	/* invalid command or not repeatable, forget it */
	228	lastcommand[0] = 0;
	229	}
	230	}
47d1a6e1	231
d87080b7 WD	232	bug_ctx.regs = NULL;
d87080b7 WD	233	bug_ctx.current_bp = 0;
47d1a6e1	234
d87080b7 WD	235	return;
d87080b7 WD	236	} /* bedbug_main_loop */
e1bf824d	237
47d1a6e1 WD	238
47d1a6e1 WD	239
47d1a6e1 WD	240	/* ======================================================================
	241	* Interpreter command to continue from a breakpoint. Just clears the
	242	* stopped flag in the context so that the breakpoint routine will
	243	* return.
	244	* ====================================================================== */
54841ab5	245	int do_bedbug_continue (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
47d1a6e1	246	{
d87080b7 WD	247	/* -------------------------------------------------- */
	248
	249	if (!bug_ctx.stopped) {
	250	printf ("Not at a breakpoint\n");
	251	return 1;
	252	}
	253
	254	bug_ctx.stopped = 0;
	255	return 0;
	256	} /* do_bedbug_continue */
	257
	258	U_BOOT_CMD (continue, 1, 0, do_bedbug_continue,
2fb2604d	259	"continue from a breakpoint",
a89c33db	260	"");
e1bf824d	261
47d1a6e1 WD	262	/* ======================================================================
	263	* Interpreter command to continue to the next instruction, stepping into
	264	* subroutines. Works by calling the find_next_addr() routine to compute
	265	* the address passes control to the CPU-specific set breakpoint routine
	266	* for the current breakpoint number.
	267	* ====================================================================== */
54841ab5	268	int do_bedbug_step (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
47d1a6e1	269	{
d87080b7 WD	270	unsigned long addr; /* Address to stop at */
	271
	272	/* -------------------------------------------------- */
	273
	274	if (!bug_ctx.stopped) {
	275	printf ("Not at a breakpoint\n");
	276	return 1;
	277	}
	278
472d5460	279	if (!find_next_address((unsigned char *) &addr, false, bug_ctx.regs))
d87080b7 WD	280	return 1;
	281
	282	if (bug_ctx.set)
	283	(*bug_ctx.set) (bug_ctx.current_bp, addr);
	284
	285	bug_ctx.stopped = 0;
	286	return 0;
	287	} /* do_bedbug_step */
	288
	289	U_BOOT_CMD (step, 1, 1, do_bedbug_step,
2fb2604d	290	"single step execution.",
a89c33db	291	"");
e1bf824d	292
47d1a6e1 WD	293	/* ======================================================================
	294	* Interpreter command to continue to the next instruction, stepping over
	295	* subroutines. Works by calling the find_next_addr() routine to compute
	296	* the address passes control to the CPU-specific set breakpoint routine
	297	* for the current breakpoint number.
	298	* ====================================================================== */
54841ab5	299	int do_bedbug_next (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
47d1a6e1	300	{
d87080b7 WD	301	unsigned long addr; /* Address to stop at */
	302
	303	/* -------------------------------------------------- */
	304
	305	if (!bug_ctx.stopped) {
	306	printf ("Not at a breakpoint\n");
	307	return 1;
	308	}
	309
472d5460	310	if (!find_next_address((unsigned char *) &addr, true, bug_ctx.regs))
d87080b7 WD	311	return 1;
	312
	313	if (bug_ctx.set)
	314	(*bug_ctx.set) (bug_ctx.current_bp, addr);
	315
	316	bug_ctx.stopped = 0;
	317	return 0;
	318	} /* do_bedbug_next */
	319
	320	U_BOOT_CMD (next, 1, 1, do_bedbug_next,
2fb2604d	321	"single step execution, stepping over subroutines.",
a89c33db	322	"");
e1bf824d	323
47d1a6e1 WD	324	/* ======================================================================
	325	* Interpreter command to print the current stack. This assumes an EABI
	326	* architecture, so it starts with GPR R1 and works back up the stack.
	327	* ====================================================================== */
54841ab5	328	int do_bedbug_stack (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
47d1a6e1	329	{
d87080b7 WD	330	unsigned long sp; /* Stack pointer */
	331	unsigned long func; /* LR from stack */
	332	int depth; /* Stack iteration level */
	333	int skip = 1; /* Flag to skip the first entry */
	334	unsigned long top; /* Top of memory address */
	335
	336	/* -------------------------------------------------- */
	337
	338	if (!bug_ctx.stopped) {
	339	printf ("Not at a breakpoint\n");
	340	return 1;
	341	}
	342
	343	top = gd->bd->bi_memstart + gd->bd->bi_memsize;
	344	depth = 0;
	345
	346	printf ("Depth PC\n");
	347	printf ("----- --------\n");
	348	printf ("%5d %08lx\n", depth++, bug_ctx.regs->nip);
	349
	350	sp = bug_ctx.regs->gpr[1];
	351	func = (unsigned long ) (sp + 4);
	352
	353	while ((func < top) && (sp < top)) {
	354	if (!skip)
	355	printf ("%5d %08lx\n", depth++, func);
	356	else
	357	--skip;
	358
	359	sp = (unsigned long ) sp;
	360	func = (unsigned long ) (sp + 4);
	361	}
	362	return 0;
	363	} /* do_bedbug_stack */
	364
	365	U_BOOT_CMD (where, 1, 1, do_bedbug_stack,
2fb2604d	366	"Print the running stack.",
a89c33db	367	"");
e1bf824d	368
47d1a6e1 WD	369	/* ======================================================================
	370	* Interpreter command to dump the registers. Calls the CPU-specific
	371	* show registers routine.
	372	* ====================================================================== */
54841ab5	373	int do_bedbug_rdump (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
47d1a6e1	374	{
d87080b7 WD	375	/* -------------------------------------------------- */
	376
	377	if (!bug_ctx.stopped) {
	378	printf ("Not at a breakpoint\n");
	379	return 1;
	380	}
	381
	382	show_regs (bug_ctx.regs);
	383	return 0;
	384	} /* do_bedbug_rdump */
	385
	386	U_BOOT_CMD (rdump, 1, 1, do_bedbug_rdump,
a89c33db	387	"Show registers.", "");
47d1a6e1	388	/* ====================================================================== */
47d1a6e1 WD	389
	390
	391	/*
	392	* Copyright (c) 2001 William L. Pitts
	393	* All rights reserved.
	394	*
	395	* Redistribution and use in source and binary forms are freely
	396	* permitted provided that the above copyright notice and this
	397	* paragraph and the following disclaimer are duplicated in all
	398	* such forms.
	399	*
	400	* This software is provided "AS IS" and without any express or
	401	* implied warranties, including, without limitation, the implied
	402	* warranties of merchantability and fitness for a particular
	403	* purpose.
	404	*/