--- /dev/null
+/*
+ * BedBug Functions
+ */
+
+#include <common.h>
+#include <command.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 */
+\f
+
+/* ======================================================================
+ * 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 */
+\f
+
+
+/* ======================================================================
+ * 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)
+{
+ /* -------------------------------------------------- */
+
+#if defined(CONFIG_4xx)
+ void bedbug405_init (void);
+
+ bedbug405_init ();
+#elif defined(CONFIG_8xx)
+ void bedbug860_init (void);
+
+ bedbug860_init ();
+#endif
+
+#if defined(CONFIG_MPC824X) || defined(CONFIG_MPC8260)
+ /* Processors that are 603e core based */
+ void bedbug603e_init (void);
+
+ bedbug603e_init ();
+#endif
+
+ return;
+} /* bedbug_init */
+\f
+
+
+/* ======================================================================
+ * 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]");
+\f
+/* ======================================================================
+ * 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);
+ 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>");
+\f
+/* ======================================================================
+ * 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.");
+\f
+/* ======================================================================
+ * 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 */
+\f
+
+
+/* ======================================================================
+ * 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 = 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(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 */
+\f
+
+
+/* ======================================================================
+ * 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",
+ "");
+\f
+/* ======================================================================
+ * 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.",
+ "");
+\f
+/* ======================================================================
+ * 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.",
+ "");
+\f
+/* ======================================================================
+ * 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.",
+ "");
+\f
+/* ======================================================================
+ * 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.
+ */
Code Review / kvmfornfv.git / blobdiff