1883 lines
37 KiB
C
1883 lines
37 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 Paul Mackerras.
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*/
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#include <linux/config.h>
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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/interrupt.h>
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#include <linux/bitops.h>
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#include <linux/kallsyms.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/bootx.h>
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#include <asm/machdep.h>
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#include <asm/xmon.h>
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#ifdef CONFIG_PMAC_BACKLIGHT
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#include <asm/backlight.h>
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#endif
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#include "nonstdio.h"
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#include "privinst.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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static unsigned long cpus_in_xmon = 0;
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static unsigned long got_xmon = 0;
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static volatile int take_xmon = -1;
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#endif /* CONFIG_SMP */
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static unsigned adrs;
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static int size = 1;
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static unsigned ndump = 64;
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static unsigned nidump = 16;
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static unsigned ncsum = 4096;
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static int termch;
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static u_int bus_error_jmp[100];
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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 address;
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unsigned instr;
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unsigned count;
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unsigned char enabled;
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};
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#define NBPTS 16
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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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/* Prototypes */
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extern void (*debugger_fault_handler)(struct pt_regs *);
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static int cmds(struct pt_regs *);
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static int mread(unsigned, void *, int);
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static int mwrite(unsigned, void *, int);
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static void 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, int);
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#ifdef __MWERKS__
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static void prndump(unsigned, int);
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static int nvreadb(unsigned);
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#endif
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static int ppc_inst_dump(unsigned, int);
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void print_address(unsigned);
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static int getsp(void);
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static void dump_hash_table(void);
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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 *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 void openforth(void); */
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static unsigned read_spr(int);
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static void write_spr(int, unsigned);
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static void super_regs(void);
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static void symbol_lookup(void);
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static void remove_bpts(void);
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static void insert_bpts(void);
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static struct bpt *at_breakpoint(unsigned pc);
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static void bpt_cmds(void);
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static void cacheflush(void);
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#ifdef CONFIG_SMP
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static void cpu_cmd(void);
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#endif /* CONFIG_SMP */
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static void csum(void);
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#ifdef CONFIG_BOOTX_TEXT
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static void vidcmds(void);
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#endif
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static void bootcmds(void);
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static void proccall(void);
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static void printtime(void);
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extern int print_insn_big_powerpc(FILE *, unsigned long, unsigned);
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extern void printf(const char *fmt, ...);
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extern int putchar(int ch);
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extern int setjmp(u_int *);
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extern void longjmp(u_int *, int);
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extern void xmon_enter(void);
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extern void xmon_leave(void);
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static unsigned start_tb[NR_CPUS][2];
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static unsigned stop_tb[NR_CPUS][2];
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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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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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e print exception information\n\
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h dump hash table\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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r print registers\n\
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S print special registers\n\
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t print backtrace\n\
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la lookup address in system.map\n\
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ls lookup symbol in system.map\n\
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x exit monitor\n\
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";
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static int xmon_trace[NR_CPUS];
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#define SSTEP 1 /* stepping because of 's' command */
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#define BRSTEP 2 /* stepping over breakpoint */
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static struct pt_regs *xmon_regs[NR_CPUS];
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extern inline void sync(void)
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{
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asm volatile("sync; isync");
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}
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extern inline void __delay(unsigned int loops)
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{
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if (loops != 0)
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__asm__ __volatile__("mtctr %0; 1: bdnz 1b" : :
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"r" (loops) : "ctr");
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}
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/* Print an address in numeric and symbolic form (if possible) */
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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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{
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char *modname;
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const char *name = NULL;
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unsigned long offset, size;
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static char tmpstr[128];
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printf("%.8lx", address);
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if (setjmp(bus_error_jmp) == 0) {
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debugger_fault_handler = handle_fault;
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sync();
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name = kallsyms_lookup(address, &size, &offset, &modname,
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tmpstr);
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sync();
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/* wait a little while to see if we get a machine check */
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__delay(200);
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}
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debugger_fault_handler = NULL;
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if (name) {
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printf("%s%s+%#lx/%#lx", mid, name, offset, size);
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if (modname)
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printf(" [%s]", modname);
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}
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printf("%s", after);
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}
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static void get_tb(unsigned *p)
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{
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unsigned hi, lo, hiagain;
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if ((get_pvr() >> 16) == 1)
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return;
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do {
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asm volatile("mftbu %0; mftb %1; mftbu %2"
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: "=r" (hi), "=r" (lo), "=r" (hiagain));
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} while (hi != hiagain);
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p[0] = hi;
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p[1] = lo;
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}
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void
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xmon(struct pt_regs *excp)
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{
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struct pt_regs regs;
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int msr, cmd;
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get_tb(stop_tb[smp_processor_id()]);
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if (excp == NULL) {
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asm volatile ("stw 0,0(%0)\n\
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lwz 0,0(1)\n\
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stw 0,4(%0)\n\
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stmw 2,8(%0)" : : "b" (®s));
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regs.nip = regs.link = ((unsigned long *)regs.gpr[1])[1];
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regs.msr = get_msr();
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regs.ctr = get_ctr();
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regs.xer = get_xer();
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regs.ccr = get_cr();
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regs.trap = 0;
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excp = ®s;
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}
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msr = get_msr();
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set_msr(msr & ~0x8000); /* disable interrupts */
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xmon_regs[smp_processor_id()] = excp;
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xmon_enter();
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excprint(excp);
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#ifdef CONFIG_SMP
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if (test_and_set_bit(smp_processor_id(), &cpus_in_xmon))
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for (;;)
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;
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while (test_and_set_bit(0, &got_xmon)) {
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if (take_xmon == smp_processor_id()) {
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take_xmon = -1;
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break;
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}
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}
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/*
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* XXX: breakpoints are removed while any cpu is in xmon
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*/
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#endif /* CONFIG_SMP */
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remove_bpts();
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#ifdef CONFIG_PMAC_BACKLIGHT
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if( setjmp(bus_error_jmp) == 0 ) {
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debugger_fault_handler = handle_fault;
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sync();
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set_backlight_enable(1);
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set_backlight_level(BACKLIGHT_MAX);
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sync();
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}
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debugger_fault_handler = NULL;
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#endif /* CONFIG_PMAC_BACKLIGHT */
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cmd = cmds(excp);
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if (cmd == 's') {
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xmon_trace[smp_processor_id()] = SSTEP;
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excp->msr |= 0x400;
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} else if (at_breakpoint(excp->nip)) {
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xmon_trace[smp_processor_id()] = BRSTEP;
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excp->msr |= 0x400;
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} else {
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xmon_trace[smp_processor_id()] = 0;
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insert_bpts();
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}
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xmon_leave();
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xmon_regs[smp_processor_id()] = NULL;
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#ifdef CONFIG_SMP
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clear_bit(0, &got_xmon);
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clear_bit(smp_processor_id(), &cpus_in_xmon);
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#endif /* CONFIG_SMP */
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set_msr(msr); /* restore interrupt enable */
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get_tb(start_tb[smp_processor_id()]);
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}
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irqreturn_t
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xmon_irq(int irq, void *d, struct pt_regs *regs)
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{
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unsigned long flags;
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local_irq_save(flags);
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printf("Keyboard interrupt\n");
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xmon(regs);
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local_irq_restore(flags);
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return IRQ_HANDLED;
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}
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int
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xmon_bpt(struct pt_regs *regs)
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{
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struct bpt *bp;
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bp = at_breakpoint(regs->nip);
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if (!bp)
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return 0;
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if (bp->count) {
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--bp->count;
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remove_bpts();
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excprint(regs);
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xmon_trace[smp_processor_id()] = BRSTEP;
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regs->msr |= 0x400;
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} else {
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xmon(regs);
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}
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return 1;
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}
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int
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xmon_sstep(struct pt_regs *regs)
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{
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if (!xmon_trace[smp_processor_id()])
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return 0;
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if (xmon_trace[smp_processor_id()] == BRSTEP) {
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xmon_trace[smp_processor_id()] = 0;
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insert_bpts();
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} else {
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xmon(regs);
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}
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return 1;
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}
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int
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xmon_dabr_match(struct pt_regs *regs)
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{
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if (dabr.enabled && dabr.count) {
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--dabr.count;
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remove_bpts();
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excprint(regs);
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xmon_trace[smp_processor_id()] = BRSTEP;
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regs->msr |= 0x400;
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} else {
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dabr.instr = regs->nip;
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xmon(regs);
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}
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return 1;
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}
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int
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xmon_iabr_match(struct pt_regs *regs)
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{
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if (iabr.enabled && iabr.count) {
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--iabr.count;
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remove_bpts();
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excprint(regs);
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xmon_trace[smp_processor_id()] = BRSTEP;
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regs->msr |= 0x400;
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} else {
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xmon(regs);
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}
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return 1;
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}
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static struct bpt *
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at_breakpoint(unsigned pc)
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{
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int i;
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struct bpt *bp;
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if (dabr.enabled && pc == dabr.instr)
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return &dabr;
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if (iabr.enabled && pc == iabr.address)
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return &iabr;
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bp = bpts;
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for (i = 0; i < NBPTS; ++i, ++bp)
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if (bp->enabled && pc == bp->address)
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return bp;
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return NULL;
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}
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static void
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insert_bpts(void)
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{
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int i;
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struct bpt *bp;
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bp = bpts;
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for (i = 0; i < NBPTS; ++i, ++bp) {
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if (!bp->enabled)
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continue;
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if (mread(bp->address, &bp->instr, 4) != 4
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|| mwrite(bp->address, &bpinstr, 4) != 4) {
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printf("Couldn't insert breakpoint at %x, disabling\n",
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bp->address);
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bp->enabled = 0;
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}
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store_inst((void *) bp->address);
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}
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#if !defined(CONFIG_8xx)
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if (dabr.enabled)
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set_dabr(dabr.address);
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if (iabr.enabled)
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set_iabr(iabr.address);
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#endif
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}
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static void
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remove_bpts(void)
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{
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int i;
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struct bpt *bp;
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unsigned instr;
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#if !defined(CONFIG_8xx)
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set_dabr(0);
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set_iabr(0);
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#endif
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bp = bpts;
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for (i = 0; i < NBPTS; ++i, ++bp) {
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if (!bp->enabled)
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continue;
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if (mread(bp->address, &instr, 4) == 4
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&& instr == bpinstr
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&& mwrite(bp->address, &bp->instr, 4) != 4)
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printf("Couldn't remove breakpoint at %x\n",
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bp->address);
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store_inst((void *) bp->address);
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}
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}
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static char *last_cmd;
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/* Command interpreting routine */
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static int
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cmds(struct pt_regs *excp)
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{
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int cmd;
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last_cmd = NULL;
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for(;;) {
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#ifdef CONFIG_SMP
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printf("%d:", smp_processor_id());
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#endif /* CONFIG_SMP */
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printf("mon> ");
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fflush(stdout);
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flush_input();
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termch = 0;
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cmd = skipbl();
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if( cmd == '\n' ) {
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if (last_cmd == NULL)
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continue;
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take_input(last_cmd);
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last_cmd = NULL;
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cmd = inchar();
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}
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switch (cmd) {
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case 'm':
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cmd = inchar();
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switch (cmd) {
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case 'm':
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case 's':
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case 'd':
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memops(cmd);
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break;
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case 'l':
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memlocate();
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break;
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case 'z':
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memzcan();
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break;
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default:
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termch = cmd;
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memex();
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}
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break;
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case 'd':
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dump();
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break;
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case 'l':
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symbol_lookup();
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break;
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case 'r':
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if (excp != NULL)
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prregs(excp); /* print regs */
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break;
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case 'e':
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if (excp == NULL)
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printf("No exception information\n");
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else
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excprint(excp);
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break;
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case 'S':
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super_regs();
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break;
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case 't':
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backtrace(excp);
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break;
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case 'f':
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cacheflush();
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break;
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case 'h':
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dump_hash_table();
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break;
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case 's':
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case 'x':
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case EOF:
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return cmd;
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case '?':
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printf(help_string);
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break;
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default:
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printf("Unrecognized command: ");
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if( ' ' < cmd && cmd <= '~' )
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putchar(cmd);
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else
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printf("\\x%x", cmd);
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printf(" (type ? for help)\n");
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break;
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case 'b':
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bpt_cmds();
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break;
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case 'C':
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csum();
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break;
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#ifdef CONFIG_SMP
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case 'c':
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cpu_cmd();
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break;
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#endif /* CONFIG_SMP */
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#ifdef CONFIG_BOOTX_TEXT
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case 'v':
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vidcmds();
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break;
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#endif
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case 'z':
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bootcmds();
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break;
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case 'p':
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proccall();
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break;
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case 'T':
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printtime();
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break;
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}
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}
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}
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|
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extern unsigned tb_to_us;
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|
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#define mulhwu(x,y) \
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({unsigned z; asm ("mulhwu %0,%1,%2" : "=r" (z) : "r" (x), "r" (y)); z;})
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|
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static void printtime(void)
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{
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unsigned int delta;
|
|
|
|
delta = stop_tb[smp_processor_id()][1]
|
|
- start_tb[smp_processor_id()][1];
|
|
delta = mulhwu(tb_to_us, delta);
|
|
printf("%u.%06u seconds\n", delta / 1000000, delta % 1000000);
|
|
}
|
|
|
|
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();
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
static void cpu_cmd(void)
|
|
{
|
|
unsigned cpu;
|
|
int timeout;
|
|
int cmd;
|
|
|
|
cmd = inchar();
|
|
if (cmd == 'i') {
|
|
/* interrupt other cpu(s) */
|
|
cpu = MSG_ALL_BUT_SELF;
|
|
if (scanhex(&cpu))
|
|
smp_send_xmon_break(cpu);
|
|
return;
|
|
}
|
|
termch = cmd;
|
|
if (!scanhex(&cpu)) {
|
|
/* print cpus waiting or in xmon */
|
|
printf("cpus stopped:");
|
|
for (cpu = 0; cpu < NR_CPUS; ++cpu) {
|
|
if (test_bit(cpu, &cpus_in_xmon)) {
|
|
printf(" %d", cpu);
|
|
if (cpu == smp_processor_id())
|
|
printf("*", cpu);
|
|
}
|
|
}
|
|
printf("\n");
|
|
return;
|
|
}
|
|
/* try to switch to cpu specified */
|
|
take_xmon = cpu;
|
|
timeout = 10000000;
|
|
while (take_xmon >= 0) {
|
|
if (--timeout == 0) {
|
|
/* yes there's a race here */
|
|
take_xmon = -1;
|
|
printf("cpu %u didn't take control\n", cpu);
|
|
return;
|
|
}
|
|
}
|
|
/* now have to wait to be given control back */
|
|
while (test_and_set_bit(0, &got_xmon)) {
|
|
if (take_xmon == smp_processor_id()) {
|
|
take_xmon = -1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#endif /* CONFIG_SMP */
|
|
|
|
#ifdef CONFIG_BOOTX_TEXT
|
|
extern boot_infos_t disp_bi;
|
|
|
|
static void vidcmds(void)
|
|
{
|
|
int c = inchar();
|
|
unsigned int val, w;
|
|
extern int boot_text_mapped;
|
|
|
|
if (!boot_text_mapped)
|
|
return;
|
|
if (c != '\n' && scanhex(&val)) {
|
|
switch (c) {
|
|
case 'd':
|
|
w = disp_bi.dispDeviceRowBytes
|
|
/ (disp_bi.dispDeviceDepth >> 3);
|
|
disp_bi.dispDeviceDepth = val;
|
|
disp_bi.dispDeviceRowBytes = w * (val >> 3);
|
|
return;
|
|
case 'p':
|
|
disp_bi.dispDeviceRowBytes = val;
|
|
return;
|
|
case 'w':
|
|
disp_bi.dispDeviceRect[2] = val;
|
|
return;
|
|
case 'h':
|
|
disp_bi.dispDeviceRect[3] = val;
|
|
return;
|
|
}
|
|
}
|
|
printf("W = %d (0x%x) H = %d (0x%x) D = %d (0x%x) P = %d (0x%x)\n",
|
|
disp_bi.dispDeviceRect[2], disp_bi.dispDeviceRect[2],
|
|
disp_bi.dispDeviceRect[3], disp_bi.dispDeviceRect[3],
|
|
disp_bi.dispDeviceDepth, disp_bi.dispDeviceDepth,
|
|
disp_bi.dispDeviceRowBytes, disp_bi.dispDeviceRowBytes);
|
|
}
|
|
#endif /* CONFIG_BOOTX_TEXT */
|
|
|
|
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);
|
|
}
|
|
|
|
static void
|
|
bpt_cmds(void)
|
|
{
|
|
int cmd;
|
|
unsigned a;
|
|
int mode, i;
|
|
struct bpt *bp;
|
|
|
|
cmd = inchar();
|
|
switch (cmd) {
|
|
#if !defined(CONFIG_8xx)
|
|
case 'd':
|
|
mode = 7;
|
|
cmd = inchar();
|
|
if (cmd == 'r')
|
|
mode = 5;
|
|
else if (cmd == 'w')
|
|
mode = 6;
|
|
else
|
|
termch = cmd;
|
|
cmd = inchar();
|
|
if (cmd == 'p')
|
|
mode &= ~4;
|
|
else
|
|
termch = cmd;
|
|
dabr.address = 0;
|
|
dabr.count = 0;
|
|
dabr.enabled = scanhex(&dabr.address);
|
|
scanhex(&dabr.count);
|
|
if (dabr.enabled)
|
|
dabr.address = (dabr.address & ~7) | mode;
|
|
break;
|
|
case 'i':
|
|
cmd = inchar();
|
|
if (cmd == 'p')
|
|
mode = 2;
|
|
else
|
|
mode = 3;
|
|
iabr.address = 0;
|
|
iabr.count = 0;
|
|
iabr.enabled = scanhex(&iabr.address);
|
|
if (iabr.enabled)
|
|
iabr.address |= mode;
|
|
scanhex(&iabr.count);
|
|
break;
|
|
#endif
|
|
case 'c':
|
|
if (!scanhex(&a)) {
|
|
/* clear all breakpoints */
|
|
for (i = 0; i < NBPTS; ++i)
|
|
bpts[i].enabled = 0;
|
|
iabr.enabled = 0;
|
|
dabr.enabled = 0;
|
|
printf("All breakpoints cleared\n");
|
|
} else {
|
|
bp = at_breakpoint(a);
|
|
if (bp == 0) {
|
|
printf("No breakpoint at %x\n", a);
|
|
} else {
|
|
bp->enabled = 0;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
termch = cmd;
|
|
if (!scanhex(&a)) {
|
|
/* print all breakpoints */
|
|
printf("type address count\n");
|
|
if (dabr.enabled) {
|
|
printf("data %.8x %8x [", dabr.address & ~7,
|
|
dabr.count);
|
|
if (dabr.address & 1)
|
|
printf("r");
|
|
if (dabr.address & 2)
|
|
printf("w");
|
|
if (!(dabr.address & 4))
|
|
printf("p");
|
|
printf("]\n");
|
|
}
|
|
if (iabr.enabled)
|
|
printf("inst %.8x %8x\n", iabr.address & ~3,
|
|
iabr.count);
|
|
for (bp = bpts; bp < &bpts[NBPTS]; ++bp)
|
|
if (bp->enabled)
|
|
printf("trap %.8x %8x\n", bp->address,
|
|
bp->count);
|
|
break;
|
|
}
|
|
bp = at_breakpoint(a);
|
|
if (bp == 0) {
|
|
for (bp = bpts; bp < &bpts[NBPTS]; ++bp)
|
|
if (!bp->enabled)
|
|
break;
|
|
if (bp >= &bpts[NBPTS]) {
|
|
printf("Sorry, no free breakpoints\n");
|
|
break;
|
|
}
|
|
}
|
|
bp->enabled = 1;
|
|
bp->address = a;
|
|
bp->count = 0;
|
|
scanhex(&bp->count);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
backtrace(struct pt_regs *excp)
|
|
{
|
|
unsigned sp;
|
|
unsigned stack[2];
|
|
struct pt_regs regs;
|
|
extern char ret_from_except, ret_from_except_full, ret_from_syscall;
|
|
|
|
printf("backtrace:\n");
|
|
|
|
if (excp != NULL)
|
|
sp = excp->gpr[1];
|
|
else
|
|
sp = getsp();
|
|
scanhex(&sp);
|
|
scannl();
|
|
for (; sp != 0; sp = stack[0]) {
|
|
if (mread(sp, stack, sizeof(stack)) != sizeof(stack))
|
|
break;
|
|
printf("[%.8lx] ", stack);
|
|
xmon_print_symbol(stack[1], " ", "\n");
|
|
if (stack[1] == (unsigned) &ret_from_except
|
|
|| stack[1] == (unsigned) &ret_from_except_full
|
|
|| stack[1] == (unsigned) &ret_from_syscall) {
|
|
if (mread(sp+16, ®s, sizeof(regs)) != sizeof(regs))
|
|
break;
|
|
printf("exception:%x [%x] %x\n", regs.trap, sp+16,
|
|
regs.nip);
|
|
sp = regs.gpr[1];
|
|
if (mread(sp, stack, sizeof(stack)) != sizeof(stack))
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
int
|
|
getsp(void)
|
|
{
|
|
int x;
|
|
|
|
asm("mr %0,1" : "=r" (x) :);
|
|
return x;
|
|
}
|
|
|
|
void
|
|
excprint(struct pt_regs *fp)
|
|
{
|
|
int trap;
|
|
|
|
#ifdef CONFIG_SMP
|
|
printf("cpu %d: ", smp_processor_id());
|
|
#endif /* CONFIG_SMP */
|
|
printf("vector: %x at pc=", fp->trap);
|
|
xmon_print_symbol(fp->nip, ": ", ", lr=");
|
|
xmon_print_symbol(fp->link, ": ", "\n");
|
|
printf("msr = %x, sp = %x [%x]\n", fp->msr, fp->gpr[1], fp);
|
|
trap = TRAP(fp);
|
|
if (trap == 0x300 || trap == 0x600)
|
|
printf("dar = %x, dsisr = %x\n", fp->dar, fp->dsisr);
|
|
if (current)
|
|
printf("current = %x, pid = %d, comm = %s\n",
|
|
current, current->pid, current->comm);
|
|
}
|
|
|
|
void
|
|
prregs(struct pt_regs *fp)
|
|
{
|
|
int n;
|
|
unsigned base;
|
|
|
|
if (scanhex(&base))
|
|
fp = (struct pt_regs *) base;
|
|
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;
|
|
}
|
|
}
|
|
printf("pc = %.8x msr = %.8x lr = %.8x cr = %.8x\n",
|
|
fp->nip, fp->msr, fp->link, fp->ccr);
|
|
printf("ctr = %.8x xer = %.8x trap = %4x\n",
|
|
fp->ctr, fp->xer, fp->trap);
|
|
}
|
|
|
|
void
|
|
cacheflush(void)
|
|
{
|
|
int cmd;
|
|
unsigned nflush;
|
|
|
|
cmd = inchar();
|
|
if (cmd != 'i')
|
|
termch = cmd;
|
|
scanhex(&adrs);
|
|
if (termch != '\n')
|
|
termch = 0;
|
|
nflush = 1;
|
|
scanhex(&nflush);
|
|
nflush = (nflush + 31) / 32;
|
|
if (cmd != 'i') {
|
|
for (; nflush > 0; --nflush, adrs += 0x20)
|
|
cflush((void *) adrs);
|
|
} else {
|
|
for (; nflush > 0; --nflush, adrs += 0x20)
|
|
cinval((void *) adrs);
|
|
}
|
|
}
|
|
|
|
unsigned int
|
|
read_spr(int n)
|
|
{
|
|
unsigned int instrs[2];
|
|
int (*code)(void);
|
|
|
|
instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6);
|
|
instrs[1] = 0x4e800020;
|
|
store_inst(instrs);
|
|
store_inst(instrs+1);
|
|
code = (int (*)(void)) instrs;
|
|
return code();
|
|
}
|
|
|
|
void
|
|
write_spr(int n, unsigned int val)
|
|
{
|
|
unsigned int instrs[2];
|
|
int (*code)(unsigned int);
|
|
|
|
instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6);
|
|
instrs[1] = 0x4e800020;
|
|
store_inst(instrs);
|
|
store_inst(instrs+1);
|
|
code = (int (*)(unsigned int)) instrs;
|
|
code(val);
|
|
}
|
|
|
|
static unsigned int regno;
|
|
extern char exc_prolog;
|
|
extern char dec_exc;
|
|
|
|
void
|
|
super_regs(void)
|
|
{
|
|
int i, cmd;
|
|
unsigned val;
|
|
|
|
cmd = skipbl();
|
|
if (cmd == '\n') {
|
|
printf("msr = %x, pvr = %x\n", get_msr(), get_pvr());
|
|
printf("sprg0-3 = %x %x %x %x\n", get_sprg0(), get_sprg1(),
|
|
get_sprg2(), get_sprg3());
|
|
printf("srr0 = %x, srr1 = %x\n", get_srr0(), get_srr1());
|
|
#ifdef CONFIG_PPC_STD_MMU
|
|
printf("sr0-15 =");
|
|
for (i = 0; i < 16; ++i)
|
|
printf(" %x", get_sr(i));
|
|
printf("\n");
|
|
#endif
|
|
asm("mr %0,1" : "=r" (i) :);
|
|
printf("sp = %x ", i);
|
|
asm("mr %0,2" : "=r" (i) :);
|
|
printf("toc = %x\n", i);
|
|
return;
|
|
}
|
|
|
|
scanhex(®no);
|
|
switch (cmd) {
|
|
case 'w':
|
|
val = read_spr(regno);
|
|
scanhex(&val);
|
|
write_spr(regno, val);
|
|
/* fall through */
|
|
case 'r':
|
|
printf("spr %x = %x\n", regno, read_spr(regno));
|
|
break;
|
|
case 's':
|
|
val = get_sr(regno);
|
|
scanhex(&val);
|
|
set_sr(regno, val);
|
|
break;
|
|
case 'm':
|
|
val = get_msr();
|
|
scanhex(&val);
|
|
set_msr(val);
|
|
break;
|
|
}
|
|
scannl();
|
|
}
|
|
|
|
#ifndef CONFIG_PPC_STD_MMU
|
|
static void
|
|
dump_hash_table(void)
|
|
{
|
|
printf("This CPU doesn't have a hash table.\n");
|
|
}
|
|
#else
|
|
|
|
#ifndef CONFIG_PPC64BRIDGE
|
|
static void
|
|
dump_hash_table_seg(unsigned seg, unsigned start, unsigned end)
|
|
{
|
|
extern void *Hash;
|
|
extern unsigned long Hash_size;
|
|
unsigned *htab = Hash;
|
|
unsigned hsize = Hash_size;
|
|
unsigned v, hmask, va, last_va = 0;
|
|
int found, last_found, i;
|
|
unsigned *hg, w1, last_w2 = 0, last_va0 = 0;
|
|
|
|
last_found = 0;
|
|
hmask = hsize / 64 - 1;
|
|
va = start;
|
|
start = (start >> 12) & 0xffff;
|
|
end = (end >> 12) & 0xffff;
|
|
for (v = start; v < end; ++v) {
|
|
found = 0;
|
|
hg = htab + (((v ^ seg) & hmask) * 16);
|
|
w1 = 0x80000000 | (seg << 7) | (v >> 10);
|
|
for (i = 0; i < 8; ++i, hg += 2) {
|
|
if (*hg == w1) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (!found) {
|
|
w1 ^= 0x40;
|
|
hg = htab + ((~(v ^ seg) & hmask) * 16);
|
|
for (i = 0; i < 8; ++i, hg += 2) {
|
|
if (*hg == w1) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!(last_found && found && (hg[1] & ~0x180) == last_w2 + 4096)) {
|
|
if (last_found) {
|
|
if (last_va != last_va0)
|
|
printf(" ... %x", last_va);
|
|
printf("\n");
|
|
}
|
|
if (found) {
|
|
printf("%x to %x", va, hg[1]);
|
|
last_va0 = va;
|
|
}
|
|
last_found = found;
|
|
}
|
|
if (found) {
|
|
last_w2 = hg[1] & ~0x180;
|
|
last_va = va;
|
|
}
|
|
va += 4096;
|
|
}
|
|
if (last_found)
|
|
printf(" ... %x\n", last_va);
|
|
}
|
|
|
|
#else /* CONFIG_PPC64BRIDGE */
|
|
static void
|
|
dump_hash_table_seg(unsigned seg, unsigned start, unsigned end)
|
|
{
|
|
extern void *Hash;
|
|
extern unsigned long Hash_size;
|
|
unsigned *htab = Hash;
|
|
unsigned hsize = Hash_size;
|
|
unsigned v, hmask, va, last_va;
|
|
int found, last_found, i;
|
|
unsigned *hg, w1, last_w2, last_va0;
|
|
|
|
last_found = 0;
|
|
hmask = hsize / 128 - 1;
|
|
va = start;
|
|
start = (start >> 12) & 0xffff;
|
|
end = (end >> 12) & 0xffff;
|
|
for (v = start; v < end; ++v) {
|
|
found = 0;
|
|
hg = htab + (((v ^ seg) & hmask) * 32);
|
|
w1 = 1 | (seg << 12) | ((v & 0xf800) >> 4);
|
|
for (i = 0; i < 8; ++i, hg += 4) {
|
|
if (hg[1] == w1) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (!found) {
|
|
w1 ^= 2;
|
|
hg = htab + ((~(v ^ seg) & hmask) * 32);
|
|
for (i = 0; i < 8; ++i, hg += 4) {
|
|
if (hg[1] == w1) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!(last_found && found && (hg[3] & ~0x180) == last_w2 + 4096)) {
|
|
if (last_found) {
|
|
if (last_va != last_va0)
|
|
printf(" ... %x", last_va);
|
|
printf("\n");
|
|
}
|
|
if (found) {
|
|
printf("%x to %x", va, hg[3]);
|
|
last_va0 = va;
|
|
}
|
|
last_found = found;
|
|
}
|
|
if (found) {
|
|
last_w2 = hg[3] & ~0x180;
|
|
last_va = va;
|
|
}
|
|
va += 4096;
|
|
}
|
|
if (last_found)
|
|
printf(" ... %x\n", last_va);
|
|
}
|
|
#endif /* CONFIG_PPC64BRIDGE */
|
|
|
|
static unsigned hash_ctx;
|
|
static unsigned hash_start;
|
|
static unsigned hash_end;
|
|
|
|
static void
|
|
dump_hash_table(void)
|
|
{
|
|
int seg;
|
|
unsigned seg_start, seg_end;
|
|
|
|
hash_ctx = 0;
|
|
hash_start = 0;
|
|
hash_end = 0xfffff000;
|
|
scanhex(&hash_ctx);
|
|
scanhex(&hash_start);
|
|
scanhex(&hash_end);
|
|
printf("Mappings for context %x\n", hash_ctx);
|
|
seg_start = hash_start;
|
|
for (seg = hash_start >> 28; seg <= hash_end >> 28; ++seg) {
|
|
seg_end = (seg << 28) | 0x0ffff000;
|
|
if (seg_end > hash_end)
|
|
seg_end = hash_end;
|
|
dump_hash_table_seg((hash_ctx << 4) + (seg * 0x111),
|
|
seg_start, seg_end);
|
|
seg_start = seg_end + 0x1000;
|
|
}
|
|
}
|
|
#endif /* CONFIG_PPC_STD_MMU */
|
|
|
|
/*
|
|
* Stuff for reading and writing memory safely
|
|
*/
|
|
|
|
int
|
|
mread(unsigned adrs, void *buf, int size)
|
|
{
|
|
volatile int n;
|
|
char *p, *q;
|
|
|
|
n = 0;
|
|
if( setjmp(bus_error_jmp) == 0 ){
|
|
debugger_fault_handler = handle_fault;
|
|
sync();
|
|
p = (char *) adrs;
|
|
q = (char *) buf;
|
|
switch (size) {
|
|
case 2: *(short *)q = *(short *)p; break;
|
|
case 4: *(int *)q = *(int *)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;
|
|
}
|
|
debugger_fault_handler = NULL;
|
|
return n;
|
|
}
|
|
|
|
int
|
|
mwrite(unsigned adrs, void *buf, int size)
|
|
{
|
|
volatile int n;
|
|
char *p, *q;
|
|
|
|
n = 0;
|
|
if( setjmp(bus_error_jmp) == 0 ){
|
|
debugger_fault_handler = handle_fault;
|
|
sync();
|
|
p = (char *) adrs;
|
|
q = (char *) buf;
|
|
switch (size) {
|
|
case 2: *(short *)p = *(short *)q; break;
|
|
case 4: *(int *)p = *(int *)q; break;
|
|
default:
|
|
for( ; n < size; ++n ) {
|
|
*p++ = *q++;
|
|
sync();
|
|
}
|
|
}
|
|
sync();
|
|
n = size;
|
|
} else {
|
|
printf("*** Error writing address %x\n", adrs + n);
|
|
}
|
|
debugger_fault_handler = NULL;
|
|
return n;
|
|
}
|
|
|
|
static int fault_type;
|
|
static int fault_except;
|
|
static char *fault_chars[] = { "--", "**", "##" };
|
|
|
|
static void
|
|
handle_fault(struct pt_regs *regs)
|
|
{
|
|
fault_except = TRAP(regs);
|
|
fault_type = TRAP(regs) == 0x200? 0: TRAP(regs) == 0x300? 1: 2;
|
|
longjmp(bus_error_jmp, 1);
|
|
}
|
|
|
|
#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;
|
|
}
|
|
}
|
|
|
|
static int brev;
|
|
static int mnoread;
|
|
|
|
void
|
|
memex(void)
|
|
{
|
|
int cmd, inc, i, nslash;
|
|
unsigned n;
|
|
unsigned char val[4];
|
|
|
|
last_cmd = "m\n";
|
|
scanhex(&adrs);
|
|
while ((cmd = skipbl()) != '\n') {
|
|
switch( cmd ){
|
|
case 'b': size = 1; break;
|
|
case 'w': size = 2; break;
|
|
case 'l': size = 4; break;
|
|
case 'r': brev = !brev; break;
|
|
case 'n': mnoread = 1; break;
|
|
case '.': mnoread = 0; break;
|
|
}
|
|
}
|
|
if( size <= 0 )
|
|
size = 1;
|
|
else if( size > 4 )
|
|
size = 4;
|
|
for(;;){
|
|
if (!mnoread)
|
|
n = mread(adrs, val, size);
|
|
printf("%.8x%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 '^':
|
|
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(&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;
|
|
}
|
|
}
|
|
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;
|
|
}
|
|
|
|
void
|
|
dump(void)
|
|
{
|
|
int c;
|
|
|
|
c = inchar();
|
|
if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n')
|
|
termch = c;
|
|
scanhex(&adrs);
|
|
if( termch != '\n')
|
|
termch = 0;
|
|
if( c == 'i' ){
|
|
scanhex(&nidump);
|
|
if( nidump == 0 )
|
|
nidump = 16;
|
|
adrs += ppc_inst_dump(adrs, nidump);
|
|
last_cmd = "di\n";
|
|
} else {
|
|
scanhex(&ndump);
|
|
if( ndump == 0 )
|
|
ndump = 64;
|
|
prdump(adrs, ndump);
|
|
adrs += ndump;
|
|
last_cmd = "d\n";
|
|
}
|
|
}
|
|
|
|
void
|
|
prdump(unsigned adrs, int ndump)
|
|
{
|
|
register int n, m, c, r, nr;
|
|
unsigned char temp[16];
|
|
|
|
for( n = ndump; n > 0; ){
|
|
printf("%.8x", adrs);
|
|
putchar(' ');
|
|
r = n < 16? n: 16;
|
|
nr = mread(adrs, temp, r);
|
|
adrs += nr;
|
|
for( m = 0; m < r; ++m ){
|
|
putchar((m & 3) == 0 && m > 0? '.': ' ');
|
|
if( m < nr )
|
|
printf("%.2x", temp[m]);
|
|
else
|
|
printf("%s", fault_chars[fault_type]);
|
|
}
|
|
for(; m < 16; ++m )
|
|
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 adr, int count)
|
|
{
|
|
int nr, dotted;
|
|
unsigned 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 ){
|
|
const char *x = fault_chars[fault_type];
|
|
printf("%.8x %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;
|
|
printf("%.8x ", adr);
|
|
printf("%.8x\t", inst);
|
|
print_insn_big_powerpc(stdout, inst, adr); /* always returns 4 */
|
|
printf("\n");
|
|
}
|
|
return adr - first_adr;
|
|
}
|
|
|
|
void
|
|
print_address(unsigned addr)
|
|
{
|
|
printf("0x%x", addr);
|
|
}
|
|
|
|
/*
|
|
* Memory operations - move, set, print differences
|
|
*/
|
|
static unsigned mdest; /* destination address */
|
|
static unsigned msrc; /* source address */
|
|
static unsigned mval; /* byte value to set memory to */
|
|
static unsigned mcount; /* # bytes to affect */
|
|
static unsigned mdiffs; /* max # differences to print */
|
|
|
|
void
|
|
memops(int cmd)
|
|
{
|
|
scanhex(&mdest);
|
|
if( termch != '\n' )
|
|
termch = 0;
|
|
scanhex(cmd == 's'? &mval: &msrc);
|
|
if( termch != '\n' )
|
|
termch = 0;
|
|
scanhex(&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(&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("%.8x %.2x # %.8x %.2x\n", (unsigned)p1 - 1,
|
|
p1[-1], (unsigned)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(&mdest);
|
|
if (termch != '\n') {
|
|
termch = 0;
|
|
scanhex(&mend);
|
|
if (termch != '\n') {
|
|
termch = 0;
|
|
scanhex(&mval);
|
|
mask = ~0;
|
|
if (termch != '\n') termch = 0;
|
|
scanhex(&mask);
|
|
}
|
|
}
|
|
n = 0;
|
|
for (a = mdest; a < mend; a += 4) {
|
|
if (mread(a, val, 4) == 4
|
|
&& ((GETWORD(val) ^ mval) & mask) == 0) {
|
|
printf("%.8x: %.8x\n", a, GETWORD(val));
|
|
if (++n >= 10)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static unsigned mskip = 0x1000;
|
|
static unsigned 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);
|
|
fflush(stdout);
|
|
} 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 int args[8];
|
|
unsigned int ret;
|
|
int i;
|
|
typedef unsigned int (*callfunc_t)(unsigned int, unsigned int,
|
|
unsigned int, unsigned int, unsigned int,
|
|
unsigned int, unsigned int, unsigned int);
|
|
callfunc_t func;
|
|
|
|
scanhex(&adrs);
|
|
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) {
|
|
debugger_fault_handler = handle_fault;
|
|
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);
|
|
}
|
|
debugger_fault_handler = NULL;
|
|
}
|
|
|
|
/* 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", "mq",
|
|
"trap", "dar", "dsisr", "res"
|
|
};
|
|
|
|
int
|
|
scanhex(unsigned *vp)
|
|
{
|
|
int c, d;
|
|
unsigned 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) {
|
|
unsigned *rp = (unsigned *)
|
|
xmon_regs[smp_processor_id()];
|
|
if (rp == NULL) {
|
|
printf("regs not available\n");
|
|
return 0;
|
|
}
|
|
*vp = rp[i];
|
|
return 1;
|
|
}
|
|
}
|
|
printf("invalid register name '%%%s'\n", regname);
|
|
return 0;
|
|
} else if (c == '$') {
|
|
static char symname[128];
|
|
int i;
|
|
for (i=0; i<63; i++) {
|
|
c = inchar();
|
|
if (isspace(c)) {
|
|
termch = c;
|
|
break;
|
|
}
|
|
symname[i] = c;
|
|
}
|
|
symname[i++] = 0;
|
|
*vp = 0;
|
|
if (setjmp(bus_error_jmp) == 0) {
|
|
debugger_fault_handler = handle_fault;
|
|
sync();
|
|
*vp = kallsyms_lookup_name(symname);
|
|
sync();
|
|
}
|
|
debugger_fault_handler = NULL;
|
|
if (!(*vp)) {
|
|
printf("unknown symbol\n");
|
|
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 (fgets(line, sizeof(line), stdin) == 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 addr;
|
|
static char tmp[128];
|
|
|
|
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) {
|
|
debugger_fault_handler = handle_fault;
|
|
sync();
|
|
addr = kallsyms_lookup_name(tmp);
|
|
if (addr)
|
|
printf("%s: %lx\n", tmp, addr);
|
|
else
|
|
printf("Symbol '%s' not found.\n", tmp);
|
|
sync();
|
|
}
|
|
debugger_fault_handler = NULL;
|
|
termch = 0;
|
|
break;
|
|
}
|
|
}
|
|
|