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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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4dbefe6459
The stack frame address was being printed incorrectly in the backtrace option of XMON on PPC. This patch fixes it to print the actual stack address instead of the address of the local variable that contains it. Signed-off-by: Josh Boyer <jdub@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
1780 lines
35 KiB
C
1780 lines
35 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/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/machdep.h>
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#include <asm/xmon.h>
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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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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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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\n\
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ls lookup symbol\n\
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C checksum\n\
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p call function with arguments\n\
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T print time\n\
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x exit monitor\n\
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zr reboot\n\
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zh halt\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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#ifdef CONFIG_4xx
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#define MSR_SSTEP_ENABLE 0x200
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#else
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#define MSR_SSTEP_ENABLE 0x400
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#endif
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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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static inline void xmon_enable_sstep(struct pt_regs *regs)
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{
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regs->msr |= MSR_SSTEP_ENABLE;
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#ifdef CONFIG_4xx
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mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM);
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#endif
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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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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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cmd = cmds(excp);
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if (cmd == 's') {
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xmon_trace[smp_processor_id()] = SSTEP;
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xmon_enable_sstep(excp);
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} else if (at_breakpoint(excp->nip)) {
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xmon_trace[smp_processor_id()] = BRSTEP;
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xmon_enable_sstep(excp);
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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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return cmd != 'X';
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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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xmon_enable_sstep(regs);
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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) || defined(CONFIG_4xx))
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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) || defined(CONFIG_4xx))
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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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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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extern unsigned tb_to_us;
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#define mulhwu(x,y) \
|
|
({unsigned z; asm ("mulhwu %0,%1,%2" : "=r" (z) : "r" (x), "r" (y)); z;})
|
|
|
|
static void printtime(void)
|
|
{
|
|
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 */
|
|
|
|
|
|
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) || defined(CONFIG_4xx))
|
|
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[0]);
|
|
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
|
|
|
|
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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|