0a730ae599
Currently, if xmon has no input device (as is generally the case on G5 powermacs), and we drop into xmon as a result of a fatal exception, it will return 1, which die() interprets as "continue without causing an oops". This fixes it by making xmon() return 0 in the case where it has no input device. Signed-off-by: Paul Mackerras <paulus@samba.org>
2632 lines
55 KiB
C
2632 lines
55 KiB
C
/*
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* Routines providing a simple monitor for use on the PowerMac.
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*
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* Copyright (C) 1996-2005 Paul Mackerras.
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* Copyright (C) 2001 PPC64 Team, IBM Corp
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* Copyrignt (C) 2006 Michael Ellerman, IBM Corp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/smp.h>
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#include <linux/mm.h>
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#include <linux/reboot.h>
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#include <linux/delay.h>
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#include <linux/kallsyms.h>
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#include <linux/cpumask.h>
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#include <linux/module.h>
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#include <linux/sysrq.h>
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#include <linux/interrupt.h>
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#include <asm/ptrace.h>
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#include <asm/string.h>
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#include <asm/prom.h>
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#include <asm/machdep.h>
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#include <asm/xmon.h>
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#include <asm/processor.h>
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#include <asm/pgtable.h>
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#include <asm/mmu.h>
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#include <asm/mmu_context.h>
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#include <asm/cputable.h>
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#include <asm/rtas.h>
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#include <asm/sstep.h>
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#include <asm/bug.h>
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#ifdef CONFIG_PPC64
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#include <asm/hvcall.h>
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#include <asm/paca.h>
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#endif
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#include "nonstdio.h"
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#define scanhex xmon_scanhex
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#define skipbl xmon_skipbl
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#ifdef CONFIG_SMP
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cpumask_t cpus_in_xmon = CPU_MASK_NONE;
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static unsigned long xmon_taken = 1;
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static int xmon_owner;
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static int xmon_gate;
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#endif /* CONFIG_SMP */
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static unsigned long in_xmon = 0;
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static unsigned long adrs;
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static int size = 1;
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#define MAX_DUMP (128 * 1024)
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static unsigned long ndump = 64;
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static unsigned long nidump = 16;
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static unsigned long ncsum = 4096;
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static int termch;
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static char tmpstr[128];
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#define JMP_BUF_LEN 23
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static long bus_error_jmp[JMP_BUF_LEN];
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static int catch_memory_errors;
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static long *xmon_fault_jmp[NR_CPUS];
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#define setjmp xmon_setjmp
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#define longjmp xmon_longjmp
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/* Breakpoint stuff */
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struct bpt {
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unsigned long address;
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unsigned int instr[2];
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atomic_t ref_count;
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int enabled;
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unsigned long pad;
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};
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/* Bits in bpt.enabled */
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#define BP_IABR_TE 1 /* IABR translation enabled */
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#define BP_IABR 2
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#define BP_TRAP 8
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#define BP_DABR 0x10
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#define NBPTS 256
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static struct bpt bpts[NBPTS];
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static struct bpt dabr;
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static struct bpt *iabr;
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static unsigned bpinstr = 0x7fe00008; /* trap */
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#define BP_NUM(bp) ((bp) - bpts + 1)
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/* Prototypes */
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static int cmds(struct pt_regs *);
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static int mread(unsigned long, void *, int);
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static int mwrite(unsigned long, void *, int);
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static int handle_fault(struct pt_regs *);
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static void byterev(unsigned char *, int);
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static void memex(void);
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static int bsesc(void);
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static void dump(void);
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static void prdump(unsigned long, long);
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static int ppc_inst_dump(unsigned long, long, int);
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void print_address(unsigned long);
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static void backtrace(struct pt_regs *);
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static void excprint(struct pt_regs *);
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static void prregs(struct pt_regs *);
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static void memops(int);
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static void memlocate(void);
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static void memzcan(void);
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static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned);
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int skipbl(void);
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int scanhex(unsigned long *valp);
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static void scannl(void);
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static int hexdigit(int);
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void getstring(char *, int);
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static void flush_input(void);
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static int inchar(void);
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static void take_input(char *);
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static unsigned long read_spr(int);
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static void write_spr(int, unsigned long);
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static void super_regs(void);
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static void remove_bpts(void);
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static void insert_bpts(void);
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static void remove_cpu_bpts(void);
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static void insert_cpu_bpts(void);
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static struct bpt *at_breakpoint(unsigned long pc);
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static struct bpt *in_breakpoint_table(unsigned long pc, unsigned long *offp);
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static int do_step(struct pt_regs *);
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static void bpt_cmds(void);
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static void cacheflush(void);
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static int cpu_cmd(void);
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static void csum(void);
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static void bootcmds(void);
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static void proccall(void);
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void dump_segments(void);
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static void symbol_lookup(void);
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static void xmon_show_stack(unsigned long sp, unsigned long lr,
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unsigned long pc);
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static void xmon_print_symbol(unsigned long address, const char *mid,
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const char *after);
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static const char *getvecname(unsigned long vec);
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int xmon_no_auto_backtrace;
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extern int print_insn_powerpc(unsigned long, unsigned long, int);
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extern void xmon_enter(void);
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extern void xmon_leave(void);
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extern long setjmp(long *);
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extern void longjmp(long *, long);
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extern void xmon_save_regs(struct pt_regs *);
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#ifdef CONFIG_PPC64
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#define REG "%.16lx"
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#define REGS_PER_LINE 4
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#define LAST_VOLATILE 13
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#else
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#define REG "%.8lx"
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#define REGS_PER_LINE 8
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#define LAST_VOLATILE 12
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#endif
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#define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3])
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#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
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|| ('a' <= (c) && (c) <= 'f') \
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|| ('A' <= (c) && (c) <= 'F'))
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#define isalnum(c) (('0' <= (c) && (c) <= '9') \
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|| ('a' <= (c) && (c) <= 'z') \
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|| ('A' <= (c) && (c) <= 'Z'))
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#define isspace(c) (c == ' ' || c == '\t' || c == 10 || c == 13 || c == 0)
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static char *help_string = "\
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Commands:\n\
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b show breakpoints\n\
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bd set data breakpoint\n\
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bi set instruction breakpoint\n\
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bc clear breakpoint\n"
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#ifdef CONFIG_SMP
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"\
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c print cpus stopped in xmon\n\
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c# try to switch to cpu number h (in hex)\n"
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#endif
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"\
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C checksum\n\
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d dump bytes\n\
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di dump instructions\n\
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df dump float values\n\
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dd dump double values\n\
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dr dump stream of raw bytes\n\
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e print exception information\n\
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f flush cache\n\
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la lookup symbol+offset of specified address\n\
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ls lookup address of specified symbol\n\
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m examine/change memory\n\
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mm move a block of memory\n\
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ms set a block of memory\n\
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md compare two blocks of memory\n\
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ml locate a block of memory\n\
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mz zero a block of memory\n\
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mi show information about memory allocation\n\
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p call a procedure\n\
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r print registers\n\
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s single step\n\
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S print special registers\n\
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t print backtrace\n\
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x exit monitor and recover\n\
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X exit monitor and dont recover\n"
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#ifdef CONFIG_PPC64
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" u dump segment table or SLB\n"
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#endif
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#ifdef CONFIG_PPC_STD_MMU_32
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" u dump segment registers\n"
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#endif
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" ? help\n"
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" zr reboot\n\
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zh halt\n"
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;
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static struct pt_regs *xmon_regs;
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static inline void sync(void)
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{
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asm volatile("sync; isync");
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}
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static inline void store_inst(void *p)
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{
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asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p));
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}
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static inline void cflush(void *p)
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{
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asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p));
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}
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static inline void cinval(void *p)
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{
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asm volatile ("dcbi 0,%0; icbi 0,%0" : : "r" (p));
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}
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/*
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* Disable surveillance (the service processor watchdog function)
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* while we are in xmon.
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* XXX we should re-enable it when we leave. :)
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*/
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#define SURVEILLANCE_TOKEN 9000
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static inline void disable_surveillance(void)
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{
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#ifdef CONFIG_PPC_PSERIES
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/* Since this can't be a module, args should end up below 4GB. */
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static struct rtas_args args;
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/*
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* At this point we have got all the cpus we can into
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* xmon, so there is hopefully no other cpu calling RTAS
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* at the moment, even though we don't take rtas.lock.
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* If we did try to take rtas.lock there would be a
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* real possibility of deadlock.
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*/
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args.token = rtas_token("set-indicator");
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if (args.token == RTAS_UNKNOWN_SERVICE)
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return;
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args.nargs = 3;
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args.nret = 1;
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args.rets = &args.args[3];
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args.args[0] = SURVEILLANCE_TOKEN;
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args.args[1] = 0;
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args.args[2] = 0;
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enter_rtas(__pa(&args));
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#endif /* CONFIG_PPC_PSERIES */
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}
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#ifdef CONFIG_SMP
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static int xmon_speaker;
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static void get_output_lock(void)
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{
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int me = smp_processor_id() + 0x100;
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int last_speaker = 0, prev;
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long timeout;
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if (xmon_speaker == me)
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return;
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for (;;) {
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if (xmon_speaker == 0) {
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last_speaker = cmpxchg(&xmon_speaker, 0, me);
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if (last_speaker == 0)
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return;
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}
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timeout = 10000000;
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while (xmon_speaker == last_speaker) {
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if (--timeout > 0)
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continue;
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/* hostile takeover */
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prev = cmpxchg(&xmon_speaker, last_speaker, me);
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if (prev == last_speaker)
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return;
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break;
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}
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}
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}
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static void release_output_lock(void)
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{
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xmon_speaker = 0;
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}
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#endif
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static int xmon_core(struct pt_regs *regs, int fromipi)
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{
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int cmd = 0;
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unsigned long msr;
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struct bpt *bp;
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long recurse_jmp[JMP_BUF_LEN];
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unsigned long offset;
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#ifdef CONFIG_SMP
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int cpu;
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int secondary;
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unsigned long timeout;
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#endif
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msr = mfmsr();
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mtmsr(msr & ~MSR_EE); /* disable interrupts */
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bp = in_breakpoint_table(regs->nip, &offset);
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if (bp != NULL) {
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regs->nip = bp->address + offset;
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atomic_dec(&bp->ref_count);
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}
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remove_cpu_bpts();
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#ifdef CONFIG_SMP
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cpu = smp_processor_id();
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if (cpu_isset(cpu, cpus_in_xmon)) {
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get_output_lock();
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excprint(regs);
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printf("cpu 0x%x: Exception %lx %s in xmon, "
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"returning to main loop\n",
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cpu, regs->trap, getvecname(TRAP(regs)));
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release_output_lock();
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longjmp(xmon_fault_jmp[cpu], 1);
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}
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if (setjmp(recurse_jmp) != 0) {
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if (!in_xmon || !xmon_gate) {
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get_output_lock();
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printf("xmon: WARNING: bad recursive fault "
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"on cpu 0x%x\n", cpu);
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release_output_lock();
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goto waiting;
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}
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secondary = !(xmon_taken && cpu == xmon_owner);
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goto cmdloop;
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}
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xmon_fault_jmp[cpu] = recurse_jmp;
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cpu_set(cpu, cpus_in_xmon);
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bp = NULL;
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if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF))
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bp = at_breakpoint(regs->nip);
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if (bp || (regs->msr & MSR_RI) == 0)
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fromipi = 0;
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if (!fromipi) {
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get_output_lock();
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excprint(regs);
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if (bp) {
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printf("cpu 0x%x stopped at breakpoint 0x%x (",
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cpu, BP_NUM(bp));
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xmon_print_symbol(regs->nip, " ", ")\n");
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}
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if ((regs->msr & MSR_RI) == 0)
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printf("WARNING: exception is not recoverable, "
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"can't continue\n");
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release_output_lock();
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}
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waiting:
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secondary = 1;
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while (secondary && !xmon_gate) {
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if (in_xmon == 0) {
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if (fromipi)
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goto leave;
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secondary = test_and_set_bit(0, &in_xmon);
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}
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barrier();
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}
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if (!secondary && !xmon_gate) {
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/* we are the first cpu to come in */
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/* interrupt other cpu(s) */
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int ncpus = num_online_cpus();
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xmon_owner = cpu;
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mb();
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if (ncpus > 1) {
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smp_send_debugger_break(MSG_ALL_BUT_SELF);
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/* wait for other cpus to come in */
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for (timeout = 100000000; timeout != 0; --timeout) {
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if (cpus_weight(cpus_in_xmon) >= ncpus)
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break;
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barrier();
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}
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}
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remove_bpts();
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disable_surveillance();
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/* for breakpoint or single step, print the current instr. */
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if (bp || TRAP(regs) == 0xd00)
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ppc_inst_dump(regs->nip, 1, 0);
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printf("enter ? for help\n");
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mb();
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xmon_gate = 1;
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barrier();
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}
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cmdloop:
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while (in_xmon) {
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if (secondary) {
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if (cpu == xmon_owner) {
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if (!test_and_set_bit(0, &xmon_taken)) {
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secondary = 0;
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continue;
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}
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/* missed it */
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while (cpu == xmon_owner)
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barrier();
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}
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barrier();
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} else {
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cmd = cmds(regs);
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if (cmd != 0) {
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/* exiting xmon */
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insert_bpts();
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xmon_gate = 0;
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wmb();
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in_xmon = 0;
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break;
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}
|
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/* have switched to some other cpu */
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secondary = 1;
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}
|
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}
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leave:
|
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cpu_clear(cpu, cpus_in_xmon);
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xmon_fault_jmp[cpu] = NULL;
|
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#else
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/* UP is simple... */
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if (in_xmon) {
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printf("Exception %lx %s in xmon, returning to main loop\n",
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regs->trap, getvecname(TRAP(regs)));
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longjmp(xmon_fault_jmp[0], 1);
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}
|
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if (setjmp(recurse_jmp) == 0) {
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xmon_fault_jmp[0] = recurse_jmp;
|
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in_xmon = 1;
|
|
|
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excprint(regs);
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bp = at_breakpoint(regs->nip);
|
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if (bp) {
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printf("Stopped at breakpoint %x (", BP_NUM(bp));
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xmon_print_symbol(regs->nip, " ", ")\n");
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}
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if ((regs->msr & MSR_RI) == 0)
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printf("WARNING: exception is not recoverable, "
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"can't continue\n");
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remove_bpts();
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disable_surveillance();
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/* for breakpoint or single step, print the current instr. */
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if (bp || TRAP(regs) == 0xd00)
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ppc_inst_dump(regs->nip, 1, 0);
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printf("enter ? for help\n");
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}
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|
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cmd = cmds(regs);
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|
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insert_bpts();
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in_xmon = 0;
|
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#endif
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|
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if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) {
|
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bp = at_breakpoint(regs->nip);
|
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if (bp != NULL) {
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int stepped = emulate_step(regs, bp->instr[0]);
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if (stepped == 0) {
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regs->nip = (unsigned long) &bp->instr[0];
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atomic_inc(&bp->ref_count);
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} else if (stepped < 0) {
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printf("Couldn't single-step %s instruction\n",
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(IS_RFID(bp->instr[0])? "rfid": "mtmsrd"));
|
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}
|
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}
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}
|
|
|
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insert_cpu_bpts();
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|
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mtmsr(msr); /* restore interrupt enable */
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|
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return cmd != 'X' && cmd != EOF;
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}
|
|
|
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int xmon(struct pt_regs *excp)
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{
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struct pt_regs regs;
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|
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if (excp == NULL) {
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xmon_save_regs(®s);
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excp = ®s;
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}
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return xmon_core(excp, 0);
|
|
}
|
|
EXPORT_SYMBOL(xmon);
|
|
|
|
irqreturn_t
|
|
xmon_irq(int irq, void *d, struct pt_regs *regs)
|
|
{
|
|
unsigned long flags;
|
|
local_irq_save(flags);
|
|
printf("Keyboard interrupt\n");
|
|
xmon(regs);
|
|
local_irq_restore(flags);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int xmon_bpt(struct pt_regs *regs)
|
|
{
|
|
struct bpt *bp;
|
|
unsigned long offset;
|
|
|
|
if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF))
|
|
return 0;
|
|
|
|
/* Are we at the trap at bp->instr[1] for some bp? */
|
|
bp = in_breakpoint_table(regs->nip, &offset);
|
|
if (bp != NULL && offset == 4) {
|
|
regs->nip = bp->address + 4;
|
|
atomic_dec(&bp->ref_count);
|
|
return 1;
|
|
}
|
|
|
|
/* Are we at a breakpoint? */
|
|
bp = at_breakpoint(regs->nip);
|
|
if (!bp)
|
|
return 0;
|
|
|
|
xmon_core(regs, 0);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int xmon_sstep(struct pt_regs *regs)
|
|
{
|
|
if (user_mode(regs))
|
|
return 0;
|
|
xmon_core(regs, 0);
|
|
return 1;
|
|
}
|
|
|
|
static int xmon_dabr_match(struct pt_regs *regs)
|
|
{
|
|
if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF))
|
|
return 0;
|
|
if (dabr.enabled == 0)
|
|
return 0;
|
|
xmon_core(regs, 0);
|
|
return 1;
|
|
}
|
|
|
|
static int xmon_iabr_match(struct pt_regs *regs)
|
|
{
|
|
if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF))
|
|
return 0;
|
|
if (iabr == 0)
|
|
return 0;
|
|
xmon_core(regs, 0);
|
|
return 1;
|
|
}
|
|
|
|
static int xmon_ipi(struct pt_regs *regs)
|
|
{
|
|
#ifdef CONFIG_SMP
|
|
if (in_xmon && !cpu_isset(smp_processor_id(), cpus_in_xmon))
|
|
xmon_core(regs, 1);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int xmon_fault_handler(struct pt_regs *regs)
|
|
{
|
|
struct bpt *bp;
|
|
unsigned long offset;
|
|
|
|
if (in_xmon && catch_memory_errors)
|
|
handle_fault(regs); /* doesn't return */
|
|
|
|
if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) {
|
|
bp = in_breakpoint_table(regs->nip, &offset);
|
|
if (bp != NULL) {
|
|
regs->nip = bp->address + offset;
|
|
atomic_dec(&bp->ref_count);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct bpt *at_breakpoint(unsigned long pc)
|
|
{
|
|
int i;
|
|
struct bpt *bp;
|
|
|
|
bp = bpts;
|
|
for (i = 0; i < NBPTS; ++i, ++bp)
|
|
if (bp->enabled && pc == bp->address)
|
|
return bp;
|
|
return NULL;
|
|
}
|
|
|
|
static struct bpt *in_breakpoint_table(unsigned long nip, unsigned long *offp)
|
|
{
|
|
unsigned long off;
|
|
|
|
off = nip - (unsigned long) bpts;
|
|
if (off >= sizeof(bpts))
|
|
return NULL;
|
|
off %= sizeof(struct bpt);
|
|
if (off != offsetof(struct bpt, instr[0])
|
|
&& off != offsetof(struct bpt, instr[1]))
|
|
return NULL;
|
|
*offp = off - offsetof(struct bpt, instr[0]);
|
|
return (struct bpt *) (nip - off);
|
|
}
|
|
|
|
static struct bpt *new_breakpoint(unsigned long a)
|
|
{
|
|
struct bpt *bp;
|
|
|
|
a &= ~3UL;
|
|
bp = at_breakpoint(a);
|
|
if (bp)
|
|
return bp;
|
|
|
|
for (bp = bpts; bp < &bpts[NBPTS]; ++bp) {
|
|
if (!bp->enabled && atomic_read(&bp->ref_count) == 0) {
|
|
bp->address = a;
|
|
bp->instr[1] = bpinstr;
|
|
store_inst(&bp->instr[1]);
|
|
return bp;
|
|
}
|
|
}
|
|
|
|
printf("Sorry, no free breakpoints. Please clear one first.\n");
|
|
return NULL;
|
|
}
|
|
|
|
static void insert_bpts(void)
|
|
{
|
|
int i;
|
|
struct bpt *bp;
|
|
|
|
bp = bpts;
|
|
for (i = 0; i < NBPTS; ++i, ++bp) {
|
|
if ((bp->enabled & (BP_TRAP|BP_IABR)) == 0)
|
|
continue;
|
|
if (mread(bp->address, &bp->instr[0], 4) != 4) {
|
|
printf("Couldn't read instruction at %lx, "
|
|
"disabling breakpoint there\n", bp->address);
|
|
bp->enabled = 0;
|
|
continue;
|
|
}
|
|
if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) {
|
|
printf("Breakpoint at %lx is on an mtmsrd or rfid "
|
|
"instruction, disabling it\n", bp->address);
|
|
bp->enabled = 0;
|
|
continue;
|
|
}
|
|
store_inst(&bp->instr[0]);
|
|
if (bp->enabled & BP_IABR)
|
|
continue;
|
|
if (mwrite(bp->address, &bpinstr, 4) != 4) {
|
|
printf("Couldn't write instruction at %lx, "
|
|
"disabling breakpoint there\n", bp->address);
|
|
bp->enabled &= ~BP_TRAP;
|
|
continue;
|
|
}
|
|
store_inst((void *)bp->address);
|
|
}
|
|
}
|
|
|
|
static void insert_cpu_bpts(void)
|
|
{
|
|
if (dabr.enabled)
|
|
set_dabr(dabr.address | (dabr.enabled & 7));
|
|
if (iabr && cpu_has_feature(CPU_FTR_IABR))
|
|
mtspr(SPRN_IABR, iabr->address
|
|
| (iabr->enabled & (BP_IABR|BP_IABR_TE)));
|
|
}
|
|
|
|
static void remove_bpts(void)
|
|
{
|
|
int i;
|
|
struct bpt *bp;
|
|
unsigned instr;
|
|
|
|
bp = bpts;
|
|
for (i = 0; i < NBPTS; ++i, ++bp) {
|
|
if ((bp->enabled & (BP_TRAP|BP_IABR)) != BP_TRAP)
|
|
continue;
|
|
if (mread(bp->address, &instr, 4) == 4
|
|
&& instr == bpinstr
|
|
&& mwrite(bp->address, &bp->instr, 4) != 4)
|
|
printf("Couldn't remove breakpoint at %lx\n",
|
|
bp->address);
|
|
else
|
|
store_inst((void *)bp->address);
|
|
}
|
|
}
|
|
|
|
static void remove_cpu_bpts(void)
|
|
{
|
|
set_dabr(0);
|
|
if (cpu_has_feature(CPU_FTR_IABR))
|
|
mtspr(SPRN_IABR, 0);
|
|
}
|
|
|
|
/* Command interpreting routine */
|
|
static char *last_cmd;
|
|
|
|
static int
|
|
cmds(struct pt_regs *excp)
|
|
{
|
|
int cmd = 0;
|
|
|
|
last_cmd = NULL;
|
|
xmon_regs = excp;
|
|
|
|
if (!xmon_no_auto_backtrace) {
|
|
xmon_no_auto_backtrace = 1;
|
|
xmon_show_stack(excp->gpr[1], excp->link, excp->nip);
|
|
}
|
|
|
|
for(;;) {
|
|
#ifdef CONFIG_SMP
|
|
printf("%x:", smp_processor_id());
|
|
#endif /* CONFIG_SMP */
|
|
printf("mon> ");
|
|
flush_input();
|
|
termch = 0;
|
|
cmd = skipbl();
|
|
if( cmd == '\n' ) {
|
|
if (last_cmd == NULL)
|
|
continue;
|
|
take_input(last_cmd);
|
|
last_cmd = NULL;
|
|
cmd = inchar();
|
|
}
|
|
switch (cmd) {
|
|
case 'm':
|
|
cmd = inchar();
|
|
switch (cmd) {
|
|
case 'm':
|
|
case 's':
|
|
case 'd':
|
|
memops(cmd);
|
|
break;
|
|
case 'l':
|
|
memlocate();
|
|
break;
|
|
case 'z':
|
|
memzcan();
|
|
break;
|
|
case 'i':
|
|
show_mem();
|
|
break;
|
|
default:
|
|
termch = cmd;
|
|
memex();
|
|
}
|
|
break;
|
|
case 'd':
|
|
dump();
|
|
break;
|
|
case 'l':
|
|
symbol_lookup();
|
|
break;
|
|
case 'r':
|
|
prregs(excp); /* print regs */
|
|
break;
|
|
case 'e':
|
|
excprint(excp);
|
|
break;
|
|
case 'S':
|
|
super_regs();
|
|
break;
|
|
case 't':
|
|
backtrace(excp);
|
|
break;
|
|
case 'f':
|
|
cacheflush();
|
|
break;
|
|
case 's':
|
|
if (do_step(excp))
|
|
return cmd;
|
|
break;
|
|
case 'x':
|
|
case 'X':
|
|
return cmd;
|
|
case EOF:
|
|
printf(" <no input ...>\n");
|
|
mdelay(2000);
|
|
return cmd;
|
|
case '?':
|
|
printf(help_string);
|
|
break;
|
|
case 'b':
|
|
bpt_cmds();
|
|
break;
|
|
case 'C':
|
|
csum();
|
|
break;
|
|
case 'c':
|
|
if (cpu_cmd())
|
|
return 0;
|
|
break;
|
|
case 'z':
|
|
bootcmds();
|
|
break;
|
|
case 'p':
|
|
proccall();
|
|
break;
|
|
#ifdef CONFIG_PPC_STD_MMU
|
|
case 'u':
|
|
dump_segments();
|
|
break;
|
|
#endif
|
|
default:
|
|
printf("Unrecognized command: ");
|
|
do {
|
|
if (' ' < cmd && cmd <= '~')
|
|
putchar(cmd);
|
|
else
|
|
printf("\\x%x", cmd);
|
|
cmd = inchar();
|
|
} while (cmd != '\n');
|
|
printf(" (type ? for help)\n");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Step a single instruction.
|
|
* Some instructions we emulate, others we execute with MSR_SE set.
|
|
*/
|
|
static int do_step(struct pt_regs *regs)
|
|
{
|
|
unsigned int instr;
|
|
int stepped;
|
|
|
|
/* check we are in 64-bit kernel mode, translation enabled */
|
|
if ((regs->msr & (MSR_SF|MSR_PR|MSR_IR)) == (MSR_SF|MSR_IR)) {
|
|
if (mread(regs->nip, &instr, 4) == 4) {
|
|
stepped = emulate_step(regs, instr);
|
|
if (stepped < 0) {
|
|
printf("Couldn't single-step %s instruction\n",
|
|
(IS_RFID(instr)? "rfid": "mtmsrd"));
|
|
return 0;
|
|
}
|
|
if (stepped > 0) {
|
|
regs->trap = 0xd00 | (regs->trap & 1);
|
|
printf("stepped to ");
|
|
xmon_print_symbol(regs->nip, " ", "\n");
|
|
ppc_inst_dump(regs->nip, 1, 0);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
regs->msr |= MSR_SE;
|
|
return 1;
|
|
}
|
|
|
|
static void bootcmds(void)
|
|
{
|
|
int cmd;
|
|
|
|
cmd = inchar();
|
|
if (cmd == 'r')
|
|
ppc_md.restart(NULL);
|
|
else if (cmd == 'h')
|
|
ppc_md.halt();
|
|
else if (cmd == 'p')
|
|
ppc_md.power_off();
|
|
}
|
|
|
|
static int cpu_cmd(void)
|
|
{
|
|
#ifdef CONFIG_SMP
|
|
unsigned long cpu;
|
|
int timeout;
|
|
int count;
|
|
|
|
if (!scanhex(&cpu)) {
|
|
/* print cpus waiting or in xmon */
|
|
printf("cpus stopped:");
|
|
count = 0;
|
|
for (cpu = 0; cpu < NR_CPUS; ++cpu) {
|
|
if (cpu_isset(cpu, cpus_in_xmon)) {
|
|
if (count == 0)
|
|
printf(" %x", cpu);
|
|
++count;
|
|
} else {
|
|
if (count > 1)
|
|
printf("-%x", cpu - 1);
|
|
count = 0;
|
|
}
|
|
}
|
|
if (count > 1)
|
|
printf("-%x", NR_CPUS - 1);
|
|
printf("\n");
|
|
return 0;
|
|
}
|
|
/* try to switch to cpu specified */
|
|
if (!cpu_isset(cpu, cpus_in_xmon)) {
|
|
printf("cpu 0x%x isn't in xmon\n", cpu);
|
|
return 0;
|
|
}
|
|
xmon_taken = 0;
|
|
mb();
|
|
xmon_owner = cpu;
|
|
timeout = 10000000;
|
|
while (!xmon_taken) {
|
|
if (--timeout == 0) {
|
|
if (test_and_set_bit(0, &xmon_taken))
|
|
break;
|
|
/* take control back */
|
|
mb();
|
|
xmon_owner = smp_processor_id();
|
|
printf("cpu %u didn't take control\n", cpu);
|
|
return 0;
|
|
}
|
|
barrier();
|
|
}
|
|
return 1;
|
|
#else
|
|
return 0;
|
|
#endif /* CONFIG_SMP */
|
|
}
|
|
|
|
static unsigned short fcstab[256] = {
|
|
0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
|
|
0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
|
|
0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
|
|
0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
|
|
0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
|
|
0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
|
|
0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
|
|
0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
|
|
0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
|
|
0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
|
|
0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
|
|
0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
|
|
0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
|
|
0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
|
|
0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
|
|
0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
|
|
0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
|
|
0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
|
|
0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
|
|
0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
|
|
0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
|
|
0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
|
|
0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
|
|
0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
|
|
0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
|
|
0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
|
|
0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
|
|
0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
|
|
0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
|
|
0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
|
|
0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
|
|
0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
|
|
};
|
|
|
|
#define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
|
|
|
|
static void
|
|
csum(void)
|
|
{
|
|
unsigned int i;
|
|
unsigned short fcs;
|
|
unsigned char v;
|
|
|
|
if (!scanhex(&adrs))
|
|
return;
|
|
if (!scanhex(&ncsum))
|
|
return;
|
|
fcs = 0xffff;
|
|
for (i = 0; i < ncsum; ++i) {
|
|
if (mread(adrs+i, &v, 1) == 0) {
|
|
printf("csum stopped at %x\n", adrs+i);
|
|
break;
|
|
}
|
|
fcs = FCS(fcs, v);
|
|
}
|
|
printf("%x\n", fcs);
|
|
}
|
|
|
|
/*
|
|
* Check if this is a suitable place to put a breakpoint.
|
|
*/
|
|
static long check_bp_loc(unsigned long addr)
|
|
{
|
|
unsigned int instr;
|
|
|
|
addr &= ~3;
|
|
if (!is_kernel_addr(addr)) {
|
|
printf("Breakpoints may only be placed at kernel addresses\n");
|
|
return 0;
|
|
}
|
|
if (!mread(addr, &instr, sizeof(instr))) {
|
|
printf("Can't read instruction at address %lx\n", addr);
|
|
return 0;
|
|
}
|
|
if (IS_MTMSRD(instr) || IS_RFID(instr)) {
|
|
printf("Breakpoints may not be placed on mtmsrd or rfid "
|
|
"instructions\n");
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static char *breakpoint_help_string =
|
|
"Breakpoint command usage:\n"
|
|
"b show breakpoints\n"
|
|
"b <addr> [cnt] set breakpoint at given instr addr\n"
|
|
"bc clear all breakpoints\n"
|
|
"bc <n/addr> clear breakpoint number n or at addr\n"
|
|
"bi <addr> [cnt] set hardware instr breakpoint (POWER3/RS64 only)\n"
|
|
"bd <addr> [cnt] set hardware data breakpoint\n"
|
|
"";
|
|
|
|
static void
|
|
bpt_cmds(void)
|
|
{
|
|
int cmd;
|
|
unsigned long a;
|
|
int mode, i;
|
|
struct bpt *bp;
|
|
const char badaddr[] = "Only kernel addresses are permitted "
|
|
"for breakpoints\n";
|
|
|
|
cmd = inchar();
|
|
switch (cmd) {
|
|
#ifndef CONFIG_8xx
|
|
case 'd': /* bd - hardware data breakpoint */
|
|
mode = 7;
|
|
cmd = inchar();
|
|
if (cmd == 'r')
|
|
mode = 5;
|
|
else if (cmd == 'w')
|
|
mode = 6;
|
|
else
|
|
termch = cmd;
|
|
dabr.address = 0;
|
|
dabr.enabled = 0;
|
|
if (scanhex(&dabr.address)) {
|
|
if (!is_kernel_addr(dabr.address)) {
|
|
printf(badaddr);
|
|
break;
|
|
}
|
|
dabr.address &= ~7;
|
|
dabr.enabled = mode | BP_DABR;
|
|
}
|
|
break;
|
|
|
|
case 'i': /* bi - hardware instr breakpoint */
|
|
if (!cpu_has_feature(CPU_FTR_IABR)) {
|
|
printf("Hardware instruction breakpoint "
|
|
"not supported on this cpu\n");
|
|
break;
|
|
}
|
|
if (iabr) {
|
|
iabr->enabled &= ~(BP_IABR | BP_IABR_TE);
|
|
iabr = NULL;
|
|
}
|
|
if (!scanhex(&a))
|
|
break;
|
|
if (!check_bp_loc(a))
|
|
break;
|
|
bp = new_breakpoint(a);
|
|
if (bp != NULL) {
|
|
bp->enabled |= BP_IABR | BP_IABR_TE;
|
|
iabr = bp;
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
case 'c':
|
|
if (!scanhex(&a)) {
|
|
/* clear all breakpoints */
|
|
for (i = 0; i < NBPTS; ++i)
|
|
bpts[i].enabled = 0;
|
|
iabr = NULL;
|
|
dabr.enabled = 0;
|
|
printf("All breakpoints cleared\n");
|
|
break;
|
|
}
|
|
|
|
if (a <= NBPTS && a >= 1) {
|
|
/* assume a breakpoint number */
|
|
bp = &bpts[a-1]; /* bp nums are 1 based */
|
|
} else {
|
|
/* assume a breakpoint address */
|
|
bp = at_breakpoint(a);
|
|
if (bp == 0) {
|
|
printf("No breakpoint at %x\n", a);
|
|
break;
|
|
}
|
|
}
|
|
|
|
printf("Cleared breakpoint %x (", BP_NUM(bp));
|
|
xmon_print_symbol(bp->address, " ", ")\n");
|
|
bp->enabled = 0;
|
|
break;
|
|
|
|
default:
|
|
termch = cmd;
|
|
cmd = skipbl();
|
|
if (cmd == '?') {
|
|
printf(breakpoint_help_string);
|
|
break;
|
|
}
|
|
termch = cmd;
|
|
if (!scanhex(&a)) {
|
|
/* print all breakpoints */
|
|
printf(" type address\n");
|
|
if (dabr.enabled) {
|
|
printf(" data "REG" [", dabr.address);
|
|
if (dabr.enabled & 1)
|
|
printf("r");
|
|
if (dabr.enabled & 2)
|
|
printf("w");
|
|
printf("]\n");
|
|
}
|
|
for (bp = bpts; bp < &bpts[NBPTS]; ++bp) {
|
|
if (!bp->enabled)
|
|
continue;
|
|
printf("%2x %s ", BP_NUM(bp),
|
|
(bp->enabled & BP_IABR)? "inst": "trap");
|
|
xmon_print_symbol(bp->address, " ", "\n");
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (!check_bp_loc(a))
|
|
break;
|
|
bp = new_breakpoint(a);
|
|
if (bp != NULL)
|
|
bp->enabled |= BP_TRAP;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Very cheap human name for vector lookup. */
|
|
static
|
|
const char *getvecname(unsigned long vec)
|
|
{
|
|
char *ret;
|
|
|
|
switch (vec) {
|
|
case 0x100: ret = "(System Reset)"; break;
|
|
case 0x200: ret = "(Machine Check)"; break;
|
|
case 0x300: ret = "(Data Access)"; break;
|
|
case 0x380: ret = "(Data SLB Access)"; break;
|
|
case 0x400: ret = "(Instruction Access)"; break;
|
|
case 0x480: ret = "(Instruction SLB Access)"; break;
|
|
case 0x500: ret = "(Hardware Interrupt)"; break;
|
|
case 0x600: ret = "(Alignment)"; break;
|
|
case 0x700: ret = "(Program Check)"; break;
|
|
case 0x800: ret = "(FPU Unavailable)"; break;
|
|
case 0x900: ret = "(Decrementer)"; break;
|
|
case 0xc00: ret = "(System Call)"; break;
|
|
case 0xd00: ret = "(Single Step)"; break;
|
|
case 0xf00: ret = "(Performance Monitor)"; break;
|
|
case 0xf20: ret = "(Altivec Unavailable)"; break;
|
|
case 0x1300: ret = "(Instruction Breakpoint)"; break;
|
|
default: ret = "";
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void get_function_bounds(unsigned long pc, unsigned long *startp,
|
|
unsigned long *endp)
|
|
{
|
|
unsigned long size, offset;
|
|
const char *name;
|
|
char *modname;
|
|
|
|
*startp = *endp = 0;
|
|
if (pc == 0)
|
|
return;
|
|
if (setjmp(bus_error_jmp) == 0) {
|
|
catch_memory_errors = 1;
|
|
sync();
|
|
name = kallsyms_lookup(pc, &size, &offset, &modname, tmpstr);
|
|
if (name != NULL) {
|
|
*startp = pc - offset;
|
|
*endp = pc - offset + size;
|
|
}
|
|
sync();
|
|
}
|
|
catch_memory_errors = 0;
|
|
}
|
|
|
|
static int xmon_depth_to_print = 64;
|
|
|
|
#ifdef CONFIG_PPC64
|
|
#define LRSAVE_OFFSET 0x10
|
|
#define REG_FRAME_MARKER 0x7265677368657265ul /* "regshere" */
|
|
#define MARKER_OFFSET 0x60
|
|
#define REGS_OFFSET 0x70
|
|
#else
|
|
#define LRSAVE_OFFSET 4
|
|
#define REG_FRAME_MARKER 0x72656773
|
|
#define MARKER_OFFSET 8
|
|
#define REGS_OFFSET 16
|
|
#endif
|
|
|
|
static void xmon_show_stack(unsigned long sp, unsigned long lr,
|
|
unsigned long pc)
|
|
{
|
|
unsigned long ip;
|
|
unsigned long newsp;
|
|
unsigned long marker;
|
|
int count = 0;
|
|
struct pt_regs regs;
|
|
|
|
do {
|
|
if (sp < PAGE_OFFSET) {
|
|
if (sp != 0)
|
|
printf("SP (%lx) is in userspace\n", sp);
|
|
break;
|
|
}
|
|
|
|
if (!mread(sp + LRSAVE_OFFSET, &ip, sizeof(unsigned long))
|
|
|| !mread(sp, &newsp, sizeof(unsigned long))) {
|
|
printf("Couldn't read stack frame at %lx\n", sp);
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* For the first stack frame, try to work out if
|
|
* LR and/or the saved LR value in the bottommost
|
|
* stack frame are valid.
|
|
*/
|
|
if ((pc | lr) != 0) {
|
|
unsigned long fnstart, fnend;
|
|
unsigned long nextip;
|
|
int printip = 1;
|
|
|
|
get_function_bounds(pc, &fnstart, &fnend);
|
|
nextip = 0;
|
|
if (newsp > sp)
|
|
mread(newsp + LRSAVE_OFFSET, &nextip,
|
|
sizeof(unsigned long));
|
|
if (lr == ip) {
|
|
if (lr < PAGE_OFFSET
|
|
|| (fnstart <= lr && lr < fnend))
|
|
printip = 0;
|
|
} else if (lr == nextip) {
|
|
printip = 0;
|
|
} else if (lr >= PAGE_OFFSET
|
|
&& !(fnstart <= lr && lr < fnend)) {
|
|
printf("[link register ] ");
|
|
xmon_print_symbol(lr, " ", "\n");
|
|
}
|
|
if (printip) {
|
|
printf("["REG"] ", sp);
|
|
xmon_print_symbol(ip, " ", " (unreliable)\n");
|
|
}
|
|
pc = lr = 0;
|
|
|
|
} else {
|
|
printf("["REG"] ", sp);
|
|
xmon_print_symbol(ip, " ", "\n");
|
|
}
|
|
|
|
/* Look for "regshere" marker to see if this is
|
|
an exception frame. */
|
|
if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long))
|
|
&& marker == REG_FRAME_MARKER) {
|
|
if (mread(sp + REGS_OFFSET, ®s, sizeof(regs))
|
|
!= sizeof(regs)) {
|
|
printf("Couldn't read registers at %lx\n",
|
|
sp + REGS_OFFSET);
|
|
break;
|
|
}
|
|
printf("--- Exception: %lx %s at ", regs.trap,
|
|
getvecname(TRAP(®s)));
|
|
pc = regs.nip;
|
|
lr = regs.link;
|
|
xmon_print_symbol(pc, " ", "\n");
|
|
}
|
|
|
|
if (newsp == 0)
|
|
break;
|
|
|
|
sp = newsp;
|
|
} while (count++ < xmon_depth_to_print);
|
|
}
|
|
|
|
static void backtrace(struct pt_regs *excp)
|
|
{
|
|
unsigned long sp;
|
|
|
|
if (scanhex(&sp))
|
|
xmon_show_stack(sp, 0, 0);
|
|
else
|
|
xmon_show_stack(excp->gpr[1], excp->link, excp->nip);
|
|
scannl();
|
|
}
|
|
|
|
static void print_bug_trap(struct pt_regs *regs)
|
|
{
|
|
struct bug_entry *bug;
|
|
unsigned long addr;
|
|
|
|
if (regs->msr & MSR_PR)
|
|
return; /* not in kernel */
|
|
addr = regs->nip; /* address of trap instruction */
|
|
if (addr < PAGE_OFFSET)
|
|
return;
|
|
bug = find_bug(regs->nip);
|
|
if (bug == NULL)
|
|
return;
|
|
if (bug->line & BUG_WARNING_TRAP)
|
|
return;
|
|
|
|
printf("kernel BUG in %s at %s:%d!\n",
|
|
bug->function, bug->file, (unsigned int)bug->line);
|
|
}
|
|
|
|
void excprint(struct pt_regs *fp)
|
|
{
|
|
unsigned long trap;
|
|
|
|
#ifdef CONFIG_SMP
|
|
printf("cpu 0x%x: ", smp_processor_id());
|
|
#endif /* CONFIG_SMP */
|
|
|
|
trap = TRAP(fp);
|
|
printf("Vector: %lx %s at [%lx]\n", fp->trap, getvecname(trap), fp);
|
|
printf(" pc: ");
|
|
xmon_print_symbol(fp->nip, ": ", "\n");
|
|
|
|
printf(" lr: ", fp->link);
|
|
xmon_print_symbol(fp->link, ": ", "\n");
|
|
|
|
printf(" sp: %lx\n", fp->gpr[1]);
|
|
printf(" msr: %lx\n", fp->msr);
|
|
|
|
if (trap == 0x300 || trap == 0x380 || trap == 0x600) {
|
|
printf(" dar: %lx\n", fp->dar);
|
|
if (trap != 0x380)
|
|
printf(" dsisr: %lx\n", fp->dsisr);
|
|
}
|
|
|
|
printf(" current = 0x%lx\n", current);
|
|
#ifdef CONFIG_PPC64
|
|
printf(" paca = 0x%lx\n", get_paca());
|
|
#endif
|
|
if (current) {
|
|
printf(" pid = %ld, comm = %s\n",
|
|
current->pid, current->comm);
|
|
}
|
|
|
|
if (trap == 0x700)
|
|
print_bug_trap(fp);
|
|
}
|
|
|
|
void prregs(struct pt_regs *fp)
|
|
{
|
|
int n, trap;
|
|
unsigned long base;
|
|
struct pt_regs regs;
|
|
|
|
if (scanhex(&base)) {
|
|
if (setjmp(bus_error_jmp) == 0) {
|
|
catch_memory_errors = 1;
|
|
sync();
|
|
regs = *(struct pt_regs *)base;
|
|
sync();
|
|
__delay(200);
|
|
} else {
|
|
catch_memory_errors = 0;
|
|
printf("*** Error reading registers from "REG"\n",
|
|
base);
|
|
return;
|
|
}
|
|
catch_memory_errors = 0;
|
|
fp = ®s;
|
|
}
|
|
|
|
#ifdef CONFIG_PPC64
|
|
if (FULL_REGS(fp)) {
|
|
for (n = 0; n < 16; ++n)
|
|
printf("R%.2ld = "REG" R%.2ld = "REG"\n",
|
|
n, fp->gpr[n], n+16, fp->gpr[n+16]);
|
|
} else {
|
|
for (n = 0; n < 7; ++n)
|
|
printf("R%.2ld = "REG" R%.2ld = "REG"\n",
|
|
n, fp->gpr[n], n+7, fp->gpr[n+7]);
|
|
}
|
|
#else
|
|
for (n = 0; n < 32; ++n) {
|
|
printf("R%.2d = %.8x%s", n, fp->gpr[n],
|
|
(n & 3) == 3? "\n": " ");
|
|
if (n == 12 && !FULL_REGS(fp)) {
|
|
printf("\n");
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
printf("pc = ");
|
|
xmon_print_symbol(fp->nip, " ", "\n");
|
|
printf("lr = ");
|
|
xmon_print_symbol(fp->link, " ", "\n");
|
|
printf("msr = "REG" cr = %.8lx\n", fp->msr, fp->ccr);
|
|
printf("ctr = "REG" xer = "REG" trap = %4lx\n",
|
|
fp->ctr, fp->xer, fp->trap);
|
|
trap = TRAP(fp);
|
|
if (trap == 0x300 || trap == 0x380 || trap == 0x600)
|
|
printf("dar = "REG" dsisr = %.8lx\n", fp->dar, fp->dsisr);
|
|
}
|
|
|
|
void cacheflush(void)
|
|
{
|
|
int cmd;
|
|
unsigned long nflush;
|
|
|
|
cmd = inchar();
|
|
if (cmd != 'i')
|
|
termch = cmd;
|
|
scanhex((void *)&adrs);
|
|
if (termch != '\n')
|
|
termch = 0;
|
|
nflush = 1;
|
|
scanhex(&nflush);
|
|
nflush = (nflush + L1_CACHE_BYTES - 1) / L1_CACHE_BYTES;
|
|
if (setjmp(bus_error_jmp) == 0) {
|
|
catch_memory_errors = 1;
|
|
sync();
|
|
|
|
if (cmd != 'i') {
|
|
for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES)
|
|
cflush((void *) adrs);
|
|
} else {
|
|
for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES)
|
|
cinval((void *) adrs);
|
|
}
|
|
sync();
|
|
/* wait a little while to see if we get a machine check */
|
|
__delay(200);
|
|
}
|
|
catch_memory_errors = 0;
|
|
}
|
|
|
|
unsigned long
|
|
read_spr(int n)
|
|
{
|
|
unsigned int instrs[2];
|
|
unsigned long (*code)(void);
|
|
unsigned long ret = -1UL;
|
|
#ifdef CONFIG_PPC64
|
|
unsigned long opd[3];
|
|
|
|
opd[0] = (unsigned long)instrs;
|
|
opd[1] = 0;
|
|
opd[2] = 0;
|
|
code = (unsigned long (*)(void)) opd;
|
|
#else
|
|
code = (unsigned long (*)(void)) instrs;
|
|
#endif
|
|
|
|
/* mfspr r3,n; blr */
|
|
instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6);
|
|
instrs[1] = 0x4e800020;
|
|
store_inst(instrs);
|
|
store_inst(instrs+1);
|
|
|
|
if (setjmp(bus_error_jmp) == 0) {
|
|
catch_memory_errors = 1;
|
|
sync();
|
|
|
|
ret = code();
|
|
|
|
sync();
|
|
/* wait a little while to see if we get a machine check */
|
|
__delay(200);
|
|
n = size;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
write_spr(int n, unsigned long val)
|
|
{
|
|
unsigned int instrs[2];
|
|
unsigned long (*code)(unsigned long);
|
|
#ifdef CONFIG_PPC64
|
|
unsigned long opd[3];
|
|
|
|
opd[0] = (unsigned long)instrs;
|
|
opd[1] = 0;
|
|
opd[2] = 0;
|
|
code = (unsigned long (*)(unsigned long)) opd;
|
|
#else
|
|
code = (unsigned long (*)(unsigned long)) instrs;
|
|
#endif
|
|
|
|
instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6);
|
|
instrs[1] = 0x4e800020;
|
|
store_inst(instrs);
|
|
store_inst(instrs+1);
|
|
|
|
if (setjmp(bus_error_jmp) == 0) {
|
|
catch_memory_errors = 1;
|
|
sync();
|
|
|
|
code(val);
|
|
|
|
sync();
|
|
/* wait a little while to see if we get a machine check */
|
|
__delay(200);
|
|
n = size;
|
|
}
|
|
}
|
|
|
|
static unsigned long regno;
|
|
extern char exc_prolog;
|
|
extern char dec_exc;
|
|
|
|
void super_regs(void)
|
|
{
|
|
int cmd;
|
|
unsigned long val;
|
|
#ifdef CONFIG_PPC_ISERIES
|
|
struct paca_struct *ptrPaca = NULL;
|
|
struct lppaca *ptrLpPaca = NULL;
|
|
struct ItLpRegSave *ptrLpRegSave = NULL;
|
|
#endif
|
|
|
|
cmd = skipbl();
|
|
if (cmd == '\n') {
|
|
unsigned long sp, toc;
|
|
asm("mr %0,1" : "=r" (sp) :);
|
|
asm("mr %0,2" : "=r" (toc) :);
|
|
|
|
printf("msr = "REG" sprg0= "REG"\n",
|
|
mfmsr(), mfspr(SPRN_SPRG0));
|
|
printf("pvr = "REG" sprg1= "REG"\n",
|
|
mfspr(SPRN_PVR), mfspr(SPRN_SPRG1));
|
|
printf("dec = "REG" sprg2= "REG"\n",
|
|
mfspr(SPRN_DEC), mfspr(SPRN_SPRG2));
|
|
printf("sp = "REG" sprg3= "REG"\n", sp, mfspr(SPRN_SPRG3));
|
|
printf("toc = "REG" dar = "REG"\n", toc, mfspr(SPRN_DAR));
|
|
#ifdef CONFIG_PPC_ISERIES
|
|
// Dump out relevant Paca data areas.
|
|
printf("Paca: \n");
|
|
ptrPaca = get_paca();
|
|
|
|
printf(" Local Processor Control Area (LpPaca): \n");
|
|
ptrLpPaca = ptrPaca->lppaca_ptr;
|
|
printf(" Saved Srr0=%.16lx Saved Srr1=%.16lx \n",
|
|
ptrLpPaca->saved_srr0, ptrLpPaca->saved_srr1);
|
|
printf(" Saved Gpr3=%.16lx Saved Gpr4=%.16lx \n",
|
|
ptrLpPaca->saved_gpr3, ptrLpPaca->saved_gpr4);
|
|
printf(" Saved Gpr5=%.16lx \n", ptrLpPaca->saved_gpr5);
|
|
|
|
printf(" Local Processor Register Save Area (LpRegSave): \n");
|
|
ptrLpRegSave = ptrPaca->reg_save_ptr;
|
|
printf(" Saved Sprg0=%.16lx Saved Sprg1=%.16lx \n",
|
|
ptrLpRegSave->xSPRG0, ptrLpRegSave->xSPRG0);
|
|
printf(" Saved Sprg2=%.16lx Saved Sprg3=%.16lx \n",
|
|
ptrLpRegSave->xSPRG2, ptrLpRegSave->xSPRG3);
|
|
printf(" Saved Msr =%.16lx Saved Nia =%.16lx \n",
|
|
ptrLpRegSave->xMSR, ptrLpRegSave->xNIA);
|
|
#endif
|
|
|
|
return;
|
|
}
|
|
|
|
scanhex(®no);
|
|
switch (cmd) {
|
|
case 'w':
|
|
val = read_spr(regno);
|
|
scanhex(&val);
|
|
write_spr(regno, val);
|
|
/* fall through */
|
|
case 'r':
|
|
printf("spr %lx = %lx\n", regno, read_spr(regno));
|
|
break;
|
|
}
|
|
scannl();
|
|
}
|
|
|
|
/*
|
|
* Stuff for reading and writing memory safely
|
|
*/
|
|
int
|
|
mread(unsigned long adrs, void *buf, int size)
|
|
{
|
|
volatile int n;
|
|
char *p, *q;
|
|
|
|
n = 0;
|
|
if (setjmp(bus_error_jmp) == 0) {
|
|
catch_memory_errors = 1;
|
|
sync();
|
|
p = (char *)adrs;
|
|
q = (char *)buf;
|
|
switch (size) {
|
|
case 2:
|
|
*(u16 *)q = *(u16 *)p;
|
|
break;
|
|
case 4:
|
|
*(u32 *)q = *(u32 *)p;
|
|
break;
|
|
case 8:
|
|
*(u64 *)q = *(u64 *)p;
|
|
break;
|
|
default:
|
|
for( ; n < size; ++n) {
|
|
*q++ = *p++;
|
|
sync();
|
|
}
|
|
}
|
|
sync();
|
|
/* wait a little while to see if we get a machine check */
|
|
__delay(200);
|
|
n = size;
|
|
}
|
|
catch_memory_errors = 0;
|
|
return n;
|
|
}
|
|
|
|
int
|
|
mwrite(unsigned long adrs, void *buf, int size)
|
|
{
|
|
volatile int n;
|
|
char *p, *q;
|
|
|
|
n = 0;
|
|
if (setjmp(bus_error_jmp) == 0) {
|
|
catch_memory_errors = 1;
|
|
sync();
|
|
p = (char *) adrs;
|
|
q = (char *) buf;
|
|
switch (size) {
|
|
case 2:
|
|
*(u16 *)p = *(u16 *)q;
|
|
break;
|
|
case 4:
|
|
*(u32 *)p = *(u32 *)q;
|
|
break;
|
|
case 8:
|
|
*(u64 *)p = *(u64 *)q;
|
|
break;
|
|
default:
|
|
for ( ; n < size; ++n) {
|
|
*p++ = *q++;
|
|
sync();
|
|
}
|
|
}
|
|
sync();
|
|
/* wait a little while to see if we get a machine check */
|
|
__delay(200);
|
|
n = size;
|
|
} else {
|
|
printf("*** Error writing address %x\n", adrs + n);
|
|
}
|
|
catch_memory_errors = 0;
|
|
return n;
|
|
}
|
|
|
|
static int fault_type;
|
|
static int fault_except;
|
|
static char *fault_chars[] = { "--", "**", "##" };
|
|
|
|
static int handle_fault(struct pt_regs *regs)
|
|
{
|
|
fault_except = TRAP(regs);
|
|
switch (TRAP(regs)) {
|
|
case 0x200:
|
|
fault_type = 0;
|
|
break;
|
|
case 0x300:
|
|
case 0x380:
|
|
fault_type = 1;
|
|
break;
|
|
default:
|
|
fault_type = 2;
|
|
}
|
|
|
|
longjmp(bus_error_jmp, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t))
|
|
|
|
void
|
|
byterev(unsigned char *val, int size)
|
|
{
|
|
int t;
|
|
|
|
switch (size) {
|
|
case 2:
|
|
SWAP(val[0], val[1], t);
|
|
break;
|
|
case 4:
|
|
SWAP(val[0], val[3], t);
|
|
SWAP(val[1], val[2], t);
|
|
break;
|
|
case 8: /* is there really any use for this? */
|
|
SWAP(val[0], val[7], t);
|
|
SWAP(val[1], val[6], t);
|
|
SWAP(val[2], val[5], t);
|
|
SWAP(val[3], val[4], t);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int brev;
|
|
static int mnoread;
|
|
|
|
static char *memex_help_string =
|
|
"Memory examine command usage:\n"
|
|
"m [addr] [flags] examine/change memory\n"
|
|
" addr is optional. will start where left off.\n"
|
|
" flags may include chars from this set:\n"
|
|
" b modify by bytes (default)\n"
|
|
" w modify by words (2 byte)\n"
|
|
" l modify by longs (4 byte)\n"
|
|
" d modify by doubleword (8 byte)\n"
|
|
" r toggle reverse byte order mode\n"
|
|
" n do not read memory (for i/o spaces)\n"
|
|
" . ok to read (default)\n"
|
|
"NOTE: flags are saved as defaults\n"
|
|
"";
|
|
|
|
static char *memex_subcmd_help_string =
|
|
"Memory examine subcommands:\n"
|
|
" hexval write this val to current location\n"
|
|
" 'string' write chars from string to this location\n"
|
|
" ' increment address\n"
|
|
" ^ decrement address\n"
|
|
" / increment addr by 0x10. //=0x100, ///=0x1000, etc\n"
|
|
" \\ decrement addr by 0x10. \\\\=0x100, \\\\\\=0x1000, etc\n"
|
|
" ` clear no-read flag\n"
|
|
" ; stay at this addr\n"
|
|
" v change to byte mode\n"
|
|
" w change to word (2 byte) mode\n"
|
|
" l change to long (4 byte) mode\n"
|
|
" u change to doubleword (8 byte) mode\n"
|
|
" m addr change current addr\n"
|
|
" n toggle no-read flag\n"
|
|
" r toggle byte reverse flag\n"
|
|
" < count back up count bytes\n"
|
|
" > count skip forward count bytes\n"
|
|
" x exit this mode\n"
|
|
"";
|
|
|
|
void
|
|
memex(void)
|
|
{
|
|
int cmd, inc, i, nslash;
|
|
unsigned long n;
|
|
unsigned char val[16];
|
|
|
|
scanhex((void *)&adrs);
|
|
cmd = skipbl();
|
|
if (cmd == '?') {
|
|
printf(memex_help_string);
|
|
return;
|
|
} else {
|
|
termch = cmd;
|
|
}
|
|
last_cmd = "m\n";
|
|
while ((cmd = skipbl()) != '\n') {
|
|
switch( cmd ){
|
|
case 'b': size = 1; break;
|
|
case 'w': size = 2; break;
|
|
case 'l': size = 4; break;
|
|
case 'd': size = 8; break;
|
|
case 'r': brev = !brev; break;
|
|
case 'n': mnoread = 1; break;
|
|
case '.': mnoread = 0; break;
|
|
}
|
|
}
|
|
if( size <= 0 )
|
|
size = 1;
|
|
else if( size > 8 )
|
|
size = 8;
|
|
for(;;){
|
|
if (!mnoread)
|
|
n = mread(adrs, val, size);
|
|
printf(REG"%c", adrs, brev? 'r': ' ');
|
|
if (!mnoread) {
|
|
if (brev)
|
|
byterev(val, size);
|
|
putchar(' ');
|
|
for (i = 0; i < n; ++i)
|
|
printf("%.2x", val[i]);
|
|
for (; i < size; ++i)
|
|
printf("%s", fault_chars[fault_type]);
|
|
}
|
|
putchar(' ');
|
|
inc = size;
|
|
nslash = 0;
|
|
for(;;){
|
|
if( scanhex(&n) ){
|
|
for (i = 0; i < size; ++i)
|
|
val[i] = n >> (i * 8);
|
|
if (!brev)
|
|
byterev(val, size);
|
|
mwrite(adrs, val, size);
|
|
inc = size;
|
|
}
|
|
cmd = skipbl();
|
|
if (cmd == '\n')
|
|
break;
|
|
inc = 0;
|
|
switch (cmd) {
|
|
case '\'':
|
|
for(;;){
|
|
n = inchar();
|
|
if( n == '\\' )
|
|
n = bsesc();
|
|
else if( n == '\'' )
|
|
break;
|
|
for (i = 0; i < size; ++i)
|
|
val[i] = n >> (i * 8);
|
|
if (!brev)
|
|
byterev(val, size);
|
|
mwrite(adrs, val, size);
|
|
adrs += size;
|
|
}
|
|
adrs -= size;
|
|
inc = size;
|
|
break;
|
|
case ',':
|
|
adrs += size;
|
|
break;
|
|
case '.':
|
|
mnoread = 0;
|
|
break;
|
|
case ';':
|
|
break;
|
|
case 'x':
|
|
case EOF:
|
|
scannl();
|
|
return;
|
|
case 'b':
|
|
case 'v':
|
|
size = 1;
|
|
break;
|
|
case 'w':
|
|
size = 2;
|
|
break;
|
|
case 'l':
|
|
size = 4;
|
|
break;
|
|
case 'u':
|
|
size = 8;
|
|
break;
|
|
case '^':
|
|
adrs -= size;
|
|
break;
|
|
break;
|
|
case '/':
|
|
if (nslash > 0)
|
|
adrs -= 1 << nslash;
|
|
else
|
|
nslash = 0;
|
|
nslash += 4;
|
|
adrs += 1 << nslash;
|
|
break;
|
|
case '\\':
|
|
if (nslash < 0)
|
|
adrs += 1 << -nslash;
|
|
else
|
|
nslash = 0;
|
|
nslash -= 4;
|
|
adrs -= 1 << -nslash;
|
|
break;
|
|
case 'm':
|
|
scanhex((void *)&adrs);
|
|
break;
|
|
case 'n':
|
|
mnoread = 1;
|
|
break;
|
|
case 'r':
|
|
brev = !brev;
|
|
break;
|
|
case '<':
|
|
n = size;
|
|
scanhex(&n);
|
|
adrs -= n;
|
|
break;
|
|
case '>':
|
|
n = size;
|
|
scanhex(&n);
|
|
adrs += n;
|
|
break;
|
|
case '?':
|
|
printf(memex_subcmd_help_string);
|
|
break;
|
|
}
|
|
}
|
|
adrs += inc;
|
|
}
|
|
}
|
|
|
|
int
|
|
bsesc(void)
|
|
{
|
|
int c;
|
|
|
|
c = inchar();
|
|
switch( c ){
|
|
case 'n': c = '\n'; break;
|
|
case 'r': c = '\r'; break;
|
|
case 'b': c = '\b'; break;
|
|
case 't': c = '\t'; break;
|
|
}
|
|
return c;
|
|
}
|
|
|
|
static void xmon_rawdump (unsigned long adrs, long ndump)
|
|
{
|
|
long n, m, r, nr;
|
|
unsigned char temp[16];
|
|
|
|
for (n = ndump; n > 0;) {
|
|
r = n < 16? n: 16;
|
|
nr = mread(adrs, temp, r);
|
|
adrs += nr;
|
|
for (m = 0; m < r; ++m) {
|
|
if (m < nr)
|
|
printf("%.2x", temp[m]);
|
|
else
|
|
printf("%s", fault_chars[fault_type]);
|
|
}
|
|
n -= r;
|
|
if (nr < r)
|
|
break;
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
|
|
|| ('a' <= (c) && (c) <= 'f') \
|
|
|| ('A' <= (c) && (c) <= 'F'))
|
|
void
|
|
dump(void)
|
|
{
|
|
int c;
|
|
|
|
c = inchar();
|
|
if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n')
|
|
termch = c;
|
|
scanhex((void *)&adrs);
|
|
if (termch != '\n')
|
|
termch = 0;
|
|
if (c == 'i') {
|
|
scanhex(&nidump);
|
|
if (nidump == 0)
|
|
nidump = 16;
|
|
else if (nidump > MAX_DUMP)
|
|
nidump = MAX_DUMP;
|
|
adrs += ppc_inst_dump(adrs, nidump, 1);
|
|
last_cmd = "di\n";
|
|
} else if (c == 'r') {
|
|
scanhex(&ndump);
|
|
if (ndump == 0)
|
|
ndump = 64;
|
|
xmon_rawdump(adrs, ndump);
|
|
adrs += ndump;
|
|
last_cmd = "dr\n";
|
|
} else {
|
|
scanhex(&ndump);
|
|
if (ndump == 0)
|
|
ndump = 64;
|
|
else if (ndump > MAX_DUMP)
|
|
ndump = MAX_DUMP;
|
|
prdump(adrs, ndump);
|
|
adrs += ndump;
|
|
last_cmd = "d\n";
|
|
}
|
|
}
|
|
|
|
void
|
|
prdump(unsigned long adrs, long ndump)
|
|
{
|
|
long n, m, c, r, nr;
|
|
unsigned char temp[16];
|
|
|
|
for (n = ndump; n > 0;) {
|
|
printf(REG, adrs);
|
|
putchar(' ');
|
|
r = n < 16? n: 16;
|
|
nr = mread(adrs, temp, r);
|
|
adrs += nr;
|
|
for (m = 0; m < r; ++m) {
|
|
if ((m & (sizeof(long) - 1)) == 0 && m > 0)
|
|
putchar(' ');
|
|
if (m < nr)
|
|
printf("%.2x", temp[m]);
|
|
else
|
|
printf("%s", fault_chars[fault_type]);
|
|
}
|
|
for (; m < 16; ++m) {
|
|
if ((m & (sizeof(long) - 1)) == 0)
|
|
putchar(' ');
|
|
printf(" ");
|
|
}
|
|
printf(" |");
|
|
for (m = 0; m < r; ++m) {
|
|
if (m < nr) {
|
|
c = temp[m];
|
|
putchar(' ' <= c && c <= '~'? c: '.');
|
|
} else
|
|
putchar(' ');
|
|
}
|
|
n -= r;
|
|
for (; m < 16; ++m)
|
|
putchar(' ');
|
|
printf("|\n");
|
|
if (nr < r)
|
|
break;
|
|
}
|
|
}
|
|
|
|
int
|
|
ppc_inst_dump(unsigned long adr, long count, int praddr)
|
|
{
|
|
int nr, dotted;
|
|
unsigned long first_adr;
|
|
unsigned long inst, last_inst = 0;
|
|
unsigned char val[4];
|
|
|
|
dotted = 0;
|
|
for (first_adr = adr; count > 0; --count, adr += 4) {
|
|
nr = mread(adr, val, 4);
|
|
if (nr == 0) {
|
|
if (praddr) {
|
|
const char *x = fault_chars[fault_type];
|
|
printf(REG" %s%s%s%s\n", adr, x, x, x, x);
|
|
}
|
|
break;
|
|
}
|
|
inst = GETWORD(val);
|
|
if (adr > first_adr && inst == last_inst) {
|
|
if (!dotted) {
|
|
printf(" ...\n");
|
|
dotted = 1;
|
|
}
|
|
continue;
|
|
}
|
|
dotted = 0;
|
|
last_inst = inst;
|
|
if (praddr)
|
|
printf(REG" %.8x", adr, inst);
|
|
printf("\t");
|
|
print_insn_powerpc(inst, adr, 0); /* always returns 4 */
|
|
printf("\n");
|
|
}
|
|
return adr - first_adr;
|
|
}
|
|
|
|
void
|
|
print_address(unsigned long addr)
|
|
{
|
|
xmon_print_symbol(addr, "\t# ", "");
|
|
}
|
|
|
|
|
|
/*
|
|
* Memory operations - move, set, print differences
|
|
*/
|
|
static unsigned long mdest; /* destination address */
|
|
static unsigned long msrc; /* source address */
|
|
static unsigned long mval; /* byte value to set memory to */
|
|
static unsigned long mcount; /* # bytes to affect */
|
|
static unsigned long mdiffs; /* max # differences to print */
|
|
|
|
void
|
|
memops(int cmd)
|
|
{
|
|
scanhex((void *)&mdest);
|
|
if( termch != '\n' )
|
|
termch = 0;
|
|
scanhex((void *)(cmd == 's'? &mval: &msrc));
|
|
if( termch != '\n' )
|
|
termch = 0;
|
|
scanhex((void *)&mcount);
|
|
switch( cmd ){
|
|
case 'm':
|
|
memmove((void *)mdest, (void *)msrc, mcount);
|
|
break;
|
|
case 's':
|
|
memset((void *)mdest, mval, mcount);
|
|
break;
|
|
case 'd':
|
|
if( termch != '\n' )
|
|
termch = 0;
|
|
scanhex((void *)&mdiffs);
|
|
memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr)
|
|
{
|
|
unsigned n, prt;
|
|
|
|
prt = 0;
|
|
for( n = nb; n > 0; --n )
|
|
if( *p1++ != *p2++ )
|
|
if( ++prt <= maxpr )
|
|
printf("%.16x %.2x # %.16x %.2x\n", p1 - 1,
|
|
p1[-1], p2 - 1, p2[-1]);
|
|
if( prt > maxpr )
|
|
printf("Total of %d differences\n", prt);
|
|
}
|
|
|
|
static unsigned mend;
|
|
static unsigned mask;
|
|
|
|
void
|
|
memlocate(void)
|
|
{
|
|
unsigned a, n;
|
|
unsigned char val[4];
|
|
|
|
last_cmd = "ml";
|
|
scanhex((void *)&mdest);
|
|
if (termch != '\n') {
|
|
termch = 0;
|
|
scanhex((void *)&mend);
|
|
if (termch != '\n') {
|
|
termch = 0;
|
|
scanhex((void *)&mval);
|
|
mask = ~0;
|
|
if (termch != '\n') termch = 0;
|
|
scanhex((void *)&mask);
|
|
}
|
|
}
|
|
n = 0;
|
|
for (a = mdest; a < mend; a += 4) {
|
|
if (mread(a, val, 4) == 4
|
|
&& ((GETWORD(val) ^ mval) & mask) == 0) {
|
|
printf("%.16x: %.16x\n", a, GETWORD(val));
|
|
if (++n >= 10)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static unsigned long mskip = 0x1000;
|
|
static unsigned long mlim = 0xffffffff;
|
|
|
|
void
|
|
memzcan(void)
|
|
{
|
|
unsigned char v;
|
|
unsigned a;
|
|
int ok, ook;
|
|
|
|
scanhex(&mdest);
|
|
if (termch != '\n') termch = 0;
|
|
scanhex(&mskip);
|
|
if (termch != '\n') termch = 0;
|
|
scanhex(&mlim);
|
|
ook = 0;
|
|
for (a = mdest; a < mlim; a += mskip) {
|
|
ok = mread(a, &v, 1);
|
|
if (ok && !ook) {
|
|
printf("%.8x .. ", a);
|
|
} else if (!ok && ook)
|
|
printf("%.8x\n", a - mskip);
|
|
ook = ok;
|
|
if (a + mskip < a)
|
|
break;
|
|
}
|
|
if (ook)
|
|
printf("%.8x\n", a - mskip);
|
|
}
|
|
|
|
void proccall(void)
|
|
{
|
|
unsigned long args[8];
|
|
unsigned long ret;
|
|
int i;
|
|
typedef unsigned long (*callfunc_t)(unsigned long, unsigned long,
|
|
unsigned long, unsigned long, unsigned long,
|
|
unsigned long, unsigned long, unsigned long);
|
|
callfunc_t func;
|
|
|
|
if (!scanhex(&adrs))
|
|
return;
|
|
if (termch != '\n')
|
|
termch = 0;
|
|
for (i = 0; i < 8; ++i)
|
|
args[i] = 0;
|
|
for (i = 0; i < 8; ++i) {
|
|
if (!scanhex(&args[i]) || termch == '\n')
|
|
break;
|
|
termch = 0;
|
|
}
|
|
func = (callfunc_t) adrs;
|
|
ret = 0;
|
|
if (setjmp(bus_error_jmp) == 0) {
|
|
catch_memory_errors = 1;
|
|
sync();
|
|
ret = func(args[0], args[1], args[2], args[3],
|
|
args[4], args[5], args[6], args[7]);
|
|
sync();
|
|
printf("return value is %x\n", ret);
|
|
} else {
|
|
printf("*** %x exception occurred\n", fault_except);
|
|
}
|
|
catch_memory_errors = 0;
|
|
}
|
|
|
|
/* Input scanning routines */
|
|
int
|
|
skipbl(void)
|
|
{
|
|
int c;
|
|
|
|
if( termch != 0 ){
|
|
c = termch;
|
|
termch = 0;
|
|
} else
|
|
c = inchar();
|
|
while( c == ' ' || c == '\t' )
|
|
c = inchar();
|
|
return c;
|
|
}
|
|
|
|
#define N_PTREGS 44
|
|
static char *regnames[N_PTREGS] = {
|
|
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
|
|
"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
|
|
"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
|
|
"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
|
|
"pc", "msr", "or3", "ctr", "lr", "xer", "ccr",
|
|
#ifdef CONFIG_PPC64
|
|
"softe",
|
|
#else
|
|
"mq",
|
|
#endif
|
|
"trap", "dar", "dsisr", "res"
|
|
};
|
|
|
|
int
|
|
scanhex(unsigned long *vp)
|
|
{
|
|
int c, d;
|
|
unsigned long v;
|
|
|
|
c = skipbl();
|
|
if (c == '%') {
|
|
/* parse register name */
|
|
char regname[8];
|
|
int i;
|
|
|
|
for (i = 0; i < sizeof(regname) - 1; ++i) {
|
|
c = inchar();
|
|
if (!isalnum(c)) {
|
|
termch = c;
|
|
break;
|
|
}
|
|
regname[i] = c;
|
|
}
|
|
regname[i] = 0;
|
|
for (i = 0; i < N_PTREGS; ++i) {
|
|
if (strcmp(regnames[i], regname) == 0) {
|
|
if (xmon_regs == NULL) {
|
|
printf("regs not available\n");
|
|
return 0;
|
|
}
|
|
*vp = ((unsigned long *)xmon_regs)[i];
|
|
return 1;
|
|
}
|
|
}
|
|
printf("invalid register name '%%%s'\n", regname);
|
|
return 0;
|
|
}
|
|
|
|
/* skip leading "0x" if any */
|
|
|
|
if (c == '0') {
|
|
c = inchar();
|
|
if (c == 'x') {
|
|
c = inchar();
|
|
} else {
|
|
d = hexdigit(c);
|
|
if (d == EOF) {
|
|
termch = c;
|
|
*vp = 0;
|
|
return 1;
|
|
}
|
|
}
|
|
} else if (c == '$') {
|
|
int i;
|
|
for (i=0; i<63; i++) {
|
|
c = inchar();
|
|
if (isspace(c)) {
|
|
termch = c;
|
|
break;
|
|
}
|
|
tmpstr[i] = c;
|
|
}
|
|
tmpstr[i++] = 0;
|
|
*vp = 0;
|
|
if (setjmp(bus_error_jmp) == 0) {
|
|
catch_memory_errors = 1;
|
|
sync();
|
|
*vp = kallsyms_lookup_name(tmpstr);
|
|
sync();
|
|
}
|
|
catch_memory_errors = 0;
|
|
if (!(*vp)) {
|
|
printf("unknown symbol '%s'\n", tmpstr);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
d = hexdigit(c);
|
|
if (d == EOF) {
|
|
termch = c;
|
|
return 0;
|
|
}
|
|
v = 0;
|
|
do {
|
|
v = (v << 4) + d;
|
|
c = inchar();
|
|
d = hexdigit(c);
|
|
} while (d != EOF);
|
|
termch = c;
|
|
*vp = v;
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
scannl(void)
|
|
{
|
|
int c;
|
|
|
|
c = termch;
|
|
termch = 0;
|
|
while( c != '\n' )
|
|
c = inchar();
|
|
}
|
|
|
|
int hexdigit(int c)
|
|
{
|
|
if( '0' <= c && c <= '9' )
|
|
return c - '0';
|
|
if( 'A' <= c && c <= 'F' )
|
|
return c - ('A' - 10);
|
|
if( 'a' <= c && c <= 'f' )
|
|
return c - ('a' - 10);
|
|
return EOF;
|
|
}
|
|
|
|
void
|
|
getstring(char *s, int size)
|
|
{
|
|
int c;
|
|
|
|
c = skipbl();
|
|
do {
|
|
if( size > 1 ){
|
|
*s++ = c;
|
|
--size;
|
|
}
|
|
c = inchar();
|
|
} while( c != ' ' && c != '\t' && c != '\n' );
|
|
termch = c;
|
|
*s = 0;
|
|
}
|
|
|
|
static char line[256];
|
|
static char *lineptr;
|
|
|
|
void
|
|
flush_input(void)
|
|
{
|
|
lineptr = NULL;
|
|
}
|
|
|
|
int
|
|
inchar(void)
|
|
{
|
|
if (lineptr == NULL || *lineptr == 0) {
|
|
if (xmon_gets(line, sizeof(line)) == NULL) {
|
|
lineptr = NULL;
|
|
return EOF;
|
|
}
|
|
lineptr = line;
|
|
}
|
|
return *lineptr++;
|
|
}
|
|
|
|
void
|
|
take_input(char *str)
|
|
{
|
|
lineptr = str;
|
|
}
|
|
|
|
|
|
static void
|
|
symbol_lookup(void)
|
|
{
|
|
int type = inchar();
|
|
unsigned long addr;
|
|
static char tmp[64];
|
|
|
|
switch (type) {
|
|
case 'a':
|
|
if (scanhex(&addr))
|
|
xmon_print_symbol(addr, ": ", "\n");
|
|
termch = 0;
|
|
break;
|
|
case 's':
|
|
getstring(tmp, 64);
|
|
if (setjmp(bus_error_jmp) == 0) {
|
|
catch_memory_errors = 1;
|
|
sync();
|
|
addr = kallsyms_lookup_name(tmp);
|
|
if (addr)
|
|
printf("%s: %lx\n", tmp, addr);
|
|
else
|
|
printf("Symbol '%s' not found.\n", tmp);
|
|
sync();
|
|
}
|
|
catch_memory_errors = 0;
|
|
termch = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/* Print an address in numeric and symbolic form (if possible) */
|
|
static void xmon_print_symbol(unsigned long address, const char *mid,
|
|
const char *after)
|
|
{
|
|
char *modname;
|
|
const char *name = NULL;
|
|
unsigned long offset, size;
|
|
|
|
printf(REG, address);
|
|
if (setjmp(bus_error_jmp) == 0) {
|
|
catch_memory_errors = 1;
|
|
sync();
|
|
name = kallsyms_lookup(address, &size, &offset, &modname,
|
|
tmpstr);
|
|
sync();
|
|
/* wait a little while to see if we get a machine check */
|
|
__delay(200);
|
|
}
|
|
|
|
catch_memory_errors = 0;
|
|
|
|
if (name) {
|
|
printf("%s%s+%#lx/%#lx", mid, name, offset, size);
|
|
if (modname)
|
|
printf(" [%s]", modname);
|
|
}
|
|
printf("%s", after);
|
|
}
|
|
|
|
#ifdef CONFIG_PPC64
|
|
static void dump_slb(void)
|
|
{
|
|
int i;
|
|
unsigned long tmp;
|
|
|
|
printf("SLB contents of cpu %x\n", smp_processor_id());
|
|
|
|
for (i = 0; i < SLB_NUM_ENTRIES; i++) {
|
|
asm volatile("slbmfee %0,%1" : "=r" (tmp) : "r" (i));
|
|
printf("%02d %016lx ", i, tmp);
|
|
|
|
asm volatile("slbmfev %0,%1" : "=r" (tmp) : "r" (i));
|
|
printf("%016lx\n", tmp);
|
|
}
|
|
}
|
|
|
|
static void dump_stab(void)
|
|
{
|
|
int i;
|
|
unsigned long *tmp = (unsigned long *)get_paca()->stab_addr;
|
|
|
|
printf("Segment table contents of cpu %x\n", smp_processor_id());
|
|
|
|
for (i = 0; i < PAGE_SIZE/16; i++) {
|
|
unsigned long a, b;
|
|
|
|
a = *tmp++;
|
|
b = *tmp++;
|
|
|
|
if (a || b) {
|
|
printf("%03d %016lx ", i, a);
|
|
printf("%016lx\n", b);
|
|
}
|
|
}
|
|
}
|
|
|
|
void dump_segments(void)
|
|
{
|
|
if (cpu_has_feature(CPU_FTR_SLB))
|
|
dump_slb();
|
|
else
|
|
dump_stab();
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC_STD_MMU_32
|
|
void dump_segments(void)
|
|
{
|
|
int i;
|
|
|
|
printf("sr0-15 =");
|
|
for (i = 0; i < 16; ++i)
|
|
printf(" %x", mfsrin(i));
|
|
printf("\n");
|
|
}
|
|
#endif
|
|
|
|
void xmon_init(int enable)
|
|
{
|
|
if (enable) {
|
|
__debugger = xmon;
|
|
__debugger_ipi = xmon_ipi;
|
|
__debugger_bpt = xmon_bpt;
|
|
__debugger_sstep = xmon_sstep;
|
|
__debugger_iabr_match = xmon_iabr_match;
|
|
__debugger_dabr_match = xmon_dabr_match;
|
|
__debugger_fault_handler = xmon_fault_handler;
|
|
} else {
|
|
__debugger = NULL;
|
|
__debugger_ipi = NULL;
|
|
__debugger_bpt = NULL;
|
|
__debugger_sstep = NULL;
|
|
__debugger_iabr_match = NULL;
|
|
__debugger_dabr_match = NULL;
|
|
__debugger_fault_handler = NULL;
|
|
}
|
|
xmon_map_scc();
|
|
}
|
|
|
|
#ifdef CONFIG_MAGIC_SYSRQ
|
|
static void sysrq_handle_xmon(int key, struct pt_regs *pt_regs,
|
|
struct tty_struct *tty)
|
|
{
|
|
/* ensure xmon is enabled */
|
|
xmon_init(1);
|
|
debugger(pt_regs);
|
|
}
|
|
|
|
static struct sysrq_key_op sysrq_xmon_op =
|
|
{
|
|
.handler = sysrq_handle_xmon,
|
|
.help_msg = "Xmon",
|
|
.action_msg = "Entering xmon",
|
|
};
|
|
|
|
static int __init setup_xmon_sysrq(void)
|
|
{
|
|
register_sysrq_key('x', &sysrq_xmon_op);
|
|
return 0;
|
|
}
|
|
__initcall(setup_xmon_sysrq);
|
|
#endif /* CONFIG_MAGIC_SYSRQ */
|
|
|
|
int __initdata xmon_early, xmon_off;
|
|
|
|
static int __init early_parse_xmon(char *p)
|
|
{
|
|
if (!p || strncmp(p, "early", 5) == 0) {
|
|
/* just "xmon" is equivalent to "xmon=early" */
|
|
xmon_init(1);
|
|
xmon_early = 1;
|
|
} else if (strncmp(p, "on", 2) == 0)
|
|
xmon_init(1);
|
|
else if (strncmp(p, "off", 3) == 0)
|
|
xmon_off = 1;
|
|
else if (strncmp(p, "nobt", 4) == 0)
|
|
xmon_no_auto_backtrace = 1;
|
|
else
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
early_param("xmon", early_parse_xmon);
|
|
|
|
void __init xmon_setup(void)
|
|
{
|
|
#ifdef CONFIG_XMON_DEFAULT
|
|
if (!xmon_off)
|
|
xmon_init(1);
|
|
#endif
|
|
if (xmon_early)
|
|
debugger(NULL);
|
|
}
|