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git.ipfire.org Git - people/ms/u-boot.git/blob - common/cmd_bedbug.c
7 #include <linux/ctype.h>
9 #include <bedbug/type.h>
10 #include <bedbug/bedbug.h>
11 #include <bedbug/regs.h>
12 #include <bedbug/ppc.h>
14 DECLARE_GLOBAL_DATA_PTR
;
16 extern void show_regs
__P ((struct pt_regs
*));
17 extern int run_command
__P ((const char *, int));
18 extern char console_buffer
[];
20 ulong dis_last_addr
= 0; /* Last address disassembled */
21 ulong dis_last_len
= 20; /* Default disassembler length */
22 CPU_DEBUG_CTX bug_ctx
; /* Bedbug context structure */
25 /* ======================================================================
26 * U-Boot's puts function does not append a newline, so the bedbug stuff
27 * will use this for the output of the dis/assembler.
28 * ====================================================================== */
30 int bedbug_puts (const char *str
)
32 /* -------------------------------------------------- */
34 printf ("%s\r\n", str
);
40 /* ======================================================================
41 * Initialize the bug_ctx structure used by the bedbug debugger. This is
42 * specific to the CPU since each has different debug registers and
44 * ====================================================================== */
46 void bedbug_init (void)
48 /* -------------------------------------------------- */
50 #if defined(CONFIG_4xx)
51 void bedbug405_init (void);
54 #elif defined(CONFIG_8xx)
55 void bedbug860_init (void);
60 #if defined(CONFIG_MPC824X) || defined(CONFIG_MPC8260)
61 /* Processors that are 603e core based */
62 void bedbug603e_init (void);
72 /* ======================================================================
73 * Entry point from the interpreter to the disassembler. Repeated calls
74 * will resume from the last disassembled address.
75 * ====================================================================== */
76 int do_bedbug_dis (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
78 ulong addr
; /* Address to start disassembly from */
79 ulong len
; /* # of instructions to disassemble */
81 /* -------------------------------------------------- */
83 /* Setup to go from the last address if none is given */
92 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
94 addr
= simple_strtoul (argv
[1], NULL
, 16);
96 /* If an extra param is given then it is the length */
98 len
= simple_strtoul (argv
[2], NULL
, 16);
101 /* Run the disassembler */
102 disppc ((unsigned char *) addr
, 0, len
, bedbug_puts
, F_RADHEX
);
104 dis_last_addr
= addr
+ (len
* 4);
107 } /* do_bedbug_dis */
109 U_BOOT_CMD (ds
, 3, 1, do_bedbug_dis
,
110 "disassemble memory",
111 "ds <address> [# instructions]");
113 /* ======================================================================
114 * Entry point from the interpreter to the assembler. Assembles
115 * instructions in consecutive memory locations until a '.' (period) is
116 * entered on a line by itself.
117 * ====================================================================== */
118 int do_bedbug_asm (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
120 long mem_addr
; /* Address to assemble into */
121 unsigned long instr
; /* Machine code for text */
122 char prompt
[15]; /* Prompt string for user input */
123 int asm_err
; /* Error code from the assembler */
125 /* -------------------------------------------------- */
133 printf ("\nEnter '.' when done\n");
134 mem_addr
= simple_strtoul (argv
[1], NULL
, 16);
138 disppc ((unsigned char *) mem_addr
, 0, 1, bedbug_puts
,
141 sprintf (prompt
, "%08lx: ", mem_addr
);
144 if (console_buffer
[0] && strcmp (console_buffer
, ".")) {
146 asmppc (mem_addr
, console_buffer
,
148 *(unsigned long *) mem_addr
= instr
;
151 printf ("*** Error: %s ***\n",
152 asm_error_str (asm_err
));
160 } /* do_bedbug_asm */
162 U_BOOT_CMD (as
, 2, 0, do_bedbug_asm
,
163 "assemble memory", "as <address>");
165 /* ======================================================================
166 * Used to set a break point from the interpreter. Simply calls into the
167 * CPU-specific break point set routine.
168 * ====================================================================== */
170 int do_bedbug_break (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
172 /* -------------------------------------------------- */
173 if (bug_ctx
.do_break
)
174 (*bug_ctx
.do_break
) (cmdtp
, flag
, argc
, argv
);
177 } /* do_bedbug_break */
179 U_BOOT_CMD (break, 3, 0, do_bedbug_break
,
180 "set or clear a breakpoint",
181 " - Set or clear a breakpoint\n"
182 "break <address> - Break at an address\n"
183 "break off <bp#> - Disable breakpoint.\n"
184 "break show - List breakpoints.");
186 /* ======================================================================
187 * Called from the debug interrupt routine. Simply calls the CPU-specific
188 * breakpoint handling routine.
189 * ====================================================================== */
191 void do_bedbug_breakpoint (struct pt_regs
*regs
)
193 /* -------------------------------------------------- */
195 if (bug_ctx
.break_isr
)
196 (*bug_ctx
.break_isr
) (regs
);
199 } /* do_bedbug_breakpoint */
203 /* ======================================================================
204 * Called from the CPU-specific breakpoint handling routine. Enter a
205 * mini main loop until the stopped flag is cleared from the breakpoint
208 * This handles the parts of the debugger that are common to all CPU's.
209 * ====================================================================== */
211 void bedbug_main_loop (unsigned long addr
, struct pt_regs
*regs
)
213 int len
; /* Length of command line */
214 int flag
; /* Command flags */
215 int rc
= 0; /* Result from run_command */
216 char prompt_str
[20]; /* Prompt string */
217 static char lastcommand
[CONFIG_SYS_CBSIZE
] = { 0 }; /* previous command */
218 /* -------------------------------------------------- */
221 (*bug_ctx
.clear
) (bug_ctx
.current_bp
);
223 printf ("Breakpoint %d: ", bug_ctx
.current_bp
);
224 disppc ((unsigned char *) addr
, 0, 1, bedbug_puts
, F_RADHEX
);
229 sprintf (prompt_str
, "BEDBUG.%d =>", bug_ctx
.current_bp
);
231 /* A miniature main loop */
232 while (bug_ctx
.stopped
) {
233 len
= readline (prompt_str
);
235 flag
= 0; /* assume no special flags for now */
238 strcpy (lastcommand
, console_buffer
);
240 flag
|= CMD_FLAG_REPEAT
;
243 printf ("<INTERRUPT>\n");
245 rc
= run_command (lastcommand
, flag
);
248 /* invalid command or not repeatable, forget it */
254 bug_ctx
.current_bp
= 0;
257 } /* bedbug_main_loop */
261 /* ======================================================================
262 * Interpreter command to continue from a breakpoint. Just clears the
263 * stopped flag in the context so that the breakpoint routine will
265 * ====================================================================== */
266 int do_bedbug_continue (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
268 /* -------------------------------------------------- */
270 if (!bug_ctx
.stopped
) {
271 printf ("Not at a breakpoint\n");
277 } /* do_bedbug_continue */
279 U_BOOT_CMD (continue, 1, 0, do_bedbug_continue
,
280 "continue from a breakpoint",
283 /* ======================================================================
284 * Interpreter command to continue to the next instruction, stepping into
285 * subroutines. Works by calling the find_next_addr() routine to compute
286 * the address passes control to the CPU-specific set breakpoint routine
287 * for the current breakpoint number.
288 * ====================================================================== */
289 int do_bedbug_step (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
291 unsigned long addr
; /* Address to stop at */
293 /* -------------------------------------------------- */
295 if (!bug_ctx
.stopped
) {
296 printf ("Not at a breakpoint\n");
300 if (!find_next_address ((unsigned char *) &addr
, FALSE
, bug_ctx
.regs
))
304 (*bug_ctx
.set
) (bug_ctx
.current_bp
, addr
);
308 } /* do_bedbug_step */
310 U_BOOT_CMD (step
, 1, 1, do_bedbug_step
,
311 "single step execution.",
314 /* ======================================================================
315 * Interpreter command to continue to the next instruction, stepping over
316 * subroutines. Works by calling the find_next_addr() routine to compute
317 * the address passes control to the CPU-specific set breakpoint routine
318 * for the current breakpoint number.
319 * ====================================================================== */
320 int do_bedbug_next (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
322 unsigned long addr
; /* Address to stop at */
324 /* -------------------------------------------------- */
326 if (!bug_ctx
.stopped
) {
327 printf ("Not at a breakpoint\n");
331 if (!find_next_address ((unsigned char *) &addr
, TRUE
, bug_ctx
.regs
))
335 (*bug_ctx
.set
) (bug_ctx
.current_bp
, addr
);
339 } /* do_bedbug_next */
341 U_BOOT_CMD (next
, 1, 1, do_bedbug_next
,
342 "single step execution, stepping over subroutines.",
345 /* ======================================================================
346 * Interpreter command to print the current stack. This assumes an EABI
347 * architecture, so it starts with GPR R1 and works back up the stack.
348 * ====================================================================== */
349 int do_bedbug_stack (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
351 unsigned long sp
; /* Stack pointer */
352 unsigned long func
; /* LR from stack */
353 int depth
; /* Stack iteration level */
354 int skip
= 1; /* Flag to skip the first entry */
355 unsigned long top
; /* Top of memory address */
357 /* -------------------------------------------------- */
359 if (!bug_ctx
.stopped
) {
360 printf ("Not at a breakpoint\n");
364 top
= gd
->bd
->bi_memstart
+ gd
->bd
->bi_memsize
;
367 printf ("Depth PC\n");
368 printf ("----- --------\n");
369 printf ("%5d %08lx\n", depth
++, bug_ctx
.regs
->nip
);
371 sp
= bug_ctx
.regs
->gpr
[1];
372 func
= *(unsigned long *) (sp
+ 4);
374 while ((func
< top
) && (sp
< top
)) {
376 printf ("%5d %08lx\n", depth
++, func
);
380 sp
= *(unsigned long *) sp
;
381 func
= *(unsigned long *) (sp
+ 4);
384 } /* do_bedbug_stack */
386 U_BOOT_CMD (where
, 1, 1, do_bedbug_stack
,
387 "Print the running stack.",
390 /* ======================================================================
391 * Interpreter command to dump the registers. Calls the CPU-specific
392 * show registers routine.
393 * ====================================================================== */
394 int do_bedbug_rdump (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
396 /* -------------------------------------------------- */
398 if (!bug_ctx
.stopped
) {
399 printf ("Not at a breakpoint\n");
403 show_regs (bug_ctx
.regs
);
405 } /* do_bedbug_rdump */
407 U_BOOT_CMD (rdump
, 1, 1, do_bedbug_rdump
,
408 "Show registers.", "");
409 /* ====================================================================== */
413 * Copyright (c) 2001 William L. Pitts
414 * All rights reserved.
416 * Redistribution and use in source and binary forms are freely
417 * permitted provided that the above copyright notice and this
418 * paragraph and the following disclaimer are duplicated in all
421 * This software is provided "AS IS" and without any express or
422 * implied warranties, including, without limitation, the implied
423 * warranties of merchantability and fitness for a particular