| /* |
| * Routines providing a simple monitor for use on the PowerMac. |
| * |
| * Copyright (C) 1996-2005 Paul Mackerras. |
| * Copyright (C) 2001 PPC64 Team, IBM Corp |
| * Copyrignt (C) 2006 Michael Ellerman, IBM Corp |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| #include <linux/errno.h> |
| #include <linux/sched.h> |
| #include <linux/smp.h> |
| #include <linux/mm.h> |
| #include <linux/reboot.h> |
| #include <linux/delay.h> |
| #include <linux/kallsyms.h> |
| #include <linux/cpumask.h> |
| #include <linux/module.h> |
| #include <linux/sysrq.h> |
| #include <linux/interrupt.h> |
| #include <linux/irq.h> |
| #include <linux/bug.h> |
| |
| #include <asm/ptrace.h> |
| #include <asm/string.h> |
| #include <asm/prom.h> |
| #include <asm/machdep.h> |
| #include <asm/xmon.h> |
| #include <asm/processor.h> |
| #include <asm/pgtable.h> |
| #include <asm/mmu.h> |
| #include <asm/mmu_context.h> |
| #include <asm/cputable.h> |
| #include <asm/rtas.h> |
| #include <asm/sstep.h> |
| #include <asm/irq_regs.h> |
| #include <asm/spu.h> |
| #include <asm/spu_priv1.h> |
| #include <asm/firmware.h> |
| #include <asm/setjmp.h> |
| #include <asm/reg.h> |
| |
| #ifdef CONFIG_PPC64 |
| #include <asm/hvcall.h> |
| #include <asm/paca.h> |
| #endif |
| |
| #include "nonstdio.h" |
| #include "dis-asm.h" |
| |
| #define scanhex xmon_scanhex |
| #define skipbl xmon_skipbl |
| |
| #ifdef CONFIG_SMP |
| static cpumask_t cpus_in_xmon = CPU_MASK_NONE; |
| static unsigned long xmon_taken = 1; |
| static int xmon_owner; |
| static int xmon_gate; |
| #endif /* CONFIG_SMP */ |
| |
| static unsigned long in_xmon __read_mostly = 0; |
| |
| static unsigned long adrs; |
| static int size = 1; |
| #define MAX_DUMP (128 * 1024) |
| static unsigned long ndump = 64; |
| static unsigned long nidump = 16; |
| static unsigned long ncsum = 4096; |
| static int termch; |
| static char tmpstr[128]; |
| |
| static long bus_error_jmp[JMP_BUF_LEN]; |
| static int catch_memory_errors; |
| static long *xmon_fault_jmp[NR_CPUS]; |
| |
| /* Breakpoint stuff */ |
| struct bpt { |
| unsigned long address; |
| unsigned int instr[2]; |
| atomic_t ref_count; |
| int enabled; |
| unsigned long pad; |
| }; |
| |
| /* Bits in bpt.enabled */ |
| #define BP_IABR_TE 1 /* IABR translation enabled */ |
| #define BP_IABR 2 |
| #define BP_TRAP 8 |
| #define BP_DABR 0x10 |
| |
| #define NBPTS 256 |
| static struct bpt bpts[NBPTS]; |
| static struct bpt dabr; |
| static struct bpt *iabr; |
| static unsigned bpinstr = 0x7fe00008; /* trap */ |
| |
| #define BP_NUM(bp) ((bp) - bpts + 1) |
| |
| /* Prototypes */ |
| static int cmds(struct pt_regs *); |
| static int mread(unsigned long, void *, int); |
| static int mwrite(unsigned long, void *, int); |
| static int handle_fault(struct pt_regs *); |
| static void byterev(unsigned char *, int); |
| static void memex(void); |
| static int bsesc(void); |
| static void dump(void); |
| static void prdump(unsigned long, long); |
| static int ppc_inst_dump(unsigned long, long, int); |
| static void dump_log_buf(void); |
| static void backtrace(struct pt_regs *); |
| static void excprint(struct pt_regs *); |
| static void prregs(struct pt_regs *); |
| static void memops(int); |
| static void memlocate(void); |
| static void memzcan(void); |
| static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned); |
| int skipbl(void); |
| int scanhex(unsigned long *valp); |
| static void scannl(void); |
| static int hexdigit(int); |
| void getstring(char *, int); |
| static void flush_input(void); |
| static int inchar(void); |
| static void take_input(char *); |
| static unsigned long read_spr(int); |
| static void write_spr(int, unsigned long); |
| static void super_regs(void); |
| static void remove_bpts(void); |
| static void insert_bpts(void); |
| static void remove_cpu_bpts(void); |
| static void insert_cpu_bpts(void); |
| static struct bpt *at_breakpoint(unsigned long pc); |
| static struct bpt *in_breakpoint_table(unsigned long pc, unsigned long *offp); |
| static int do_step(struct pt_regs *); |
| static void bpt_cmds(void); |
| static void cacheflush(void); |
| static int cpu_cmd(void); |
| static void csum(void); |
| static void bootcmds(void); |
| static void proccall(void); |
| void dump_segments(void); |
| static void symbol_lookup(void); |
| static void xmon_show_stack(unsigned long sp, unsigned long lr, |
| unsigned long pc); |
| static void xmon_print_symbol(unsigned long address, const char *mid, |
| const char *after); |
| static const char *getvecname(unsigned long vec); |
| |
| static int do_spu_cmd(void); |
| |
| #ifdef CONFIG_44x |
| static void dump_tlb_44x(void); |
| #endif |
| #ifdef CONFIG_PPC_BOOK3E |
| static void dump_tlb_book3e(void); |
| #endif |
| |
| static int xmon_no_auto_backtrace; |
| |
| extern void xmon_enter(void); |
| extern void xmon_leave(void); |
| |
| #ifdef CONFIG_PPC64 |
| #define REG "%.16lx" |
| #define REGS_PER_LINE 4 |
| #define LAST_VOLATILE 13 |
| #else |
| #define REG "%.8lx" |
| #define REGS_PER_LINE 8 |
| #define LAST_VOLATILE 12 |
| #endif |
| |
| #define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3]) |
| |
| #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ |
| || ('a' <= (c) && (c) <= 'f') \ |
| || ('A' <= (c) && (c) <= 'F')) |
| #define isalnum(c) (('0' <= (c) && (c) <= '9') \ |
| || ('a' <= (c) && (c) <= 'z') \ |
| || ('A' <= (c) && (c) <= 'Z')) |
| #define isspace(c) (c == ' ' || c == '\t' || c == 10 || c == 13 || c == 0) |
| |
| static char *help_string = "\ |
| Commands:\n\ |
| b show breakpoints\n\ |
| bd set data breakpoint\n\ |
| bi set instruction breakpoint\n\ |
| bc clear breakpoint\n" |
| #ifdef CONFIG_SMP |
| "\ |
| c print cpus stopped in xmon\n\ |
| c# try to switch to cpu number h (in hex)\n" |
| #endif |
| "\ |
| C checksum\n\ |
| d dump bytes\n\ |
| di dump instructions\n\ |
| df dump float values\n\ |
| dd dump double values\n\ |
| dl dump the kernel log buffer\n\ |
| dr dump stream of raw bytes\n\ |
| e print exception information\n\ |
| f flush cache\n\ |
| la lookup symbol+offset of specified address\n\ |
| ls lookup address of specified symbol\n\ |
| m examine/change memory\n\ |
| mm move a block of memory\n\ |
| ms set a block of memory\n\ |
| md compare two blocks of memory\n\ |
| ml locate a block of memory\n\ |
| mz zero a block of memory\n\ |
| mi show information about memory allocation\n\ |
| p call a procedure\n\ |
| r print registers\n\ |
| s single step\n" |
| #ifdef CONFIG_SPU_BASE |
| " ss stop execution on all spus\n\ |
| sr restore execution on stopped spus\n\ |
| sf # dump spu fields for spu # (in hex)\n\ |
| sd # dump spu local store for spu # (in hex)\n\ |
| sdi # disassemble spu local store for spu # (in hex)\n" |
| #endif |
| " S print special registers\n\ |
| t print backtrace\n\ |
| x exit monitor and recover\n\ |
| X exit monitor and dont recover\n" |
| #ifdef CONFIG_PPC64 |
| " u dump segment table or SLB\n" |
| #endif |
| #ifdef CONFIG_PPC_STD_MMU_32 |
| " u dump segment registers\n" |
| #endif |
| #ifdef CONFIG_44x |
| " u dump TLB\n" |
| #endif |
| " ? help\n" |
| " zr reboot\n\ |
| zh halt\n" |
| ; |
| |
| static struct pt_regs *xmon_regs; |
| |
| static inline void sync(void) |
| { |
| asm volatile("sync; isync"); |
| } |
| |
| static inline void store_inst(void *p) |
| { |
| asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p)); |
| } |
| |
| static inline void cflush(void *p) |
| { |
| asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p)); |
| } |
| |
| static inline void cinval(void *p) |
| { |
| asm volatile ("dcbi 0,%0; icbi 0,%0" : : "r" (p)); |
| } |
| |
| /* |
| * Disable surveillance (the service processor watchdog function) |
| * while we are in xmon. |
| * XXX we should re-enable it when we leave. :) |
| */ |
| #define SURVEILLANCE_TOKEN 9000 |
| |
| static inline void disable_surveillance(void) |
| { |
| #ifdef CONFIG_PPC_PSERIES |
| /* Since this can't be a module, args should end up below 4GB. */ |
| static struct rtas_args args; |
| |
| /* |
| * At this point we have got all the cpus we can into |
| * xmon, so there is hopefully no other cpu calling RTAS |
| * at the moment, even though we don't take rtas.lock. |
| * If we did try to take rtas.lock there would be a |
| * real possibility of deadlock. |
| */ |
| args.token = rtas_token("set-indicator"); |
| if (args.token == RTAS_UNKNOWN_SERVICE) |
| return; |
| args.nargs = 3; |
| args.nret = 1; |
| args.rets = &args.args[3]; |
| args.args[0] = SURVEILLANCE_TOKEN; |
| args.args[1] = 0; |
| args.args[2] = 0; |
| enter_rtas(__pa(&args)); |
| #endif /* CONFIG_PPC_PSERIES */ |
| } |
| |
| #ifdef CONFIG_SMP |
| static int xmon_speaker; |
| |
| static void get_output_lock(void) |
| { |
| int me = smp_processor_id() + 0x100; |
| int last_speaker = 0, prev; |
| long timeout; |
| |
| if (xmon_speaker == me) |
| return; |
| for (;;) { |
| if (xmon_speaker == 0) { |
| last_speaker = cmpxchg(&xmon_speaker, 0, me); |
| if (last_speaker == 0) |
| return; |
| } |
| timeout = 10000000; |
| while (xmon_speaker == last_speaker) { |
| if (--timeout > 0) |
| continue; |
| /* hostile takeover */ |
| prev = cmpxchg(&xmon_speaker, last_speaker, me); |
| if (prev == last_speaker) |
| return; |
| break; |
| } |
| } |
| } |
| |
| static void release_output_lock(void) |
| { |
| xmon_speaker = 0; |
| } |
| |
| int cpus_are_in_xmon(void) |
| { |
| return !cpumask_empty(&cpus_in_xmon); |
| } |
| #endif |
| |
| static inline int unrecoverable_excp(struct pt_regs *regs) |
| { |
| #ifdef CONFIG_4xx |
| /* We have no MSR_RI bit on 4xx, so we simply return false */ |
| return 0; |
| #else |
| return ((regs->msr & MSR_RI) == 0); |
| #endif |
| } |
| |
| static int xmon_core(struct pt_regs *regs, int fromipi) |
| { |
| int cmd = 0; |
| struct bpt *bp; |
| long recurse_jmp[JMP_BUF_LEN]; |
| unsigned long offset; |
| unsigned long flags; |
| #ifdef CONFIG_SMP |
| int cpu; |
| int secondary; |
| unsigned long timeout; |
| #endif |
| |
| local_irq_save(flags); |
| |
| bp = in_breakpoint_table(regs->nip, &offset); |
| if (bp != NULL) { |
| regs->nip = bp->address + offset; |
| atomic_dec(&bp->ref_count); |
| } |
| |
| remove_cpu_bpts(); |
| |
| #ifdef CONFIG_SMP |
| cpu = smp_processor_id(); |
| if (cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
| get_output_lock(); |
| excprint(regs); |
| printf("cpu 0x%x: Exception %lx %s in xmon, " |
| "returning to main loop\n", |
| cpu, regs->trap, getvecname(TRAP(regs))); |
| release_output_lock(); |
| longjmp(xmon_fault_jmp[cpu], 1); |
| } |
| |
| if (setjmp(recurse_jmp) != 0) { |
| if (!in_xmon || !xmon_gate) { |
| get_output_lock(); |
| printf("xmon: WARNING: bad recursive fault " |
| "on cpu 0x%x\n", cpu); |
| release_output_lock(); |
| goto waiting; |
| } |
| secondary = !(xmon_taken && cpu == xmon_owner); |
| goto cmdloop; |
| } |
| |
| xmon_fault_jmp[cpu] = recurse_jmp; |
| cpumask_set_cpu(cpu, &cpus_in_xmon); |
| |
| bp = NULL; |
| if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) |
| bp = at_breakpoint(regs->nip); |
| if (bp || unrecoverable_excp(regs)) |
| fromipi = 0; |
| |
| if (!fromipi) { |
| get_output_lock(); |
| excprint(regs); |
| if (bp) { |
| printf("cpu 0x%x stopped at breakpoint 0x%x (", |
| cpu, BP_NUM(bp)); |
| xmon_print_symbol(regs->nip, " ", ")\n"); |
| } |
| if (unrecoverable_excp(regs)) |
| printf("WARNING: exception is not recoverable, " |
| "can't continue\n"); |
| release_output_lock(); |
| } |
| |
| waiting: |
| secondary = 1; |
| while (secondary && !xmon_gate) { |
| if (in_xmon == 0) { |
| if (fromipi) |
| goto leave; |
| secondary = test_and_set_bit(0, &in_xmon); |
| } |
| barrier(); |
| } |
| |
| if (!secondary && !xmon_gate) { |
| /* we are the first cpu to come in */ |
| /* interrupt other cpu(s) */ |
| int ncpus = num_online_cpus(); |
| |
| xmon_owner = cpu; |
| mb(); |
| if (ncpus > 1) { |
| smp_send_debugger_break(); |
| /* wait for other cpus to come in */ |
| for (timeout = 100000000; timeout != 0; --timeout) { |
| if (cpumask_weight(&cpus_in_xmon) >= ncpus) |
| break; |
| barrier(); |
| } |
| } |
| remove_bpts(); |
| disable_surveillance(); |
| /* for breakpoint or single step, print the current instr. */ |
| if (bp || TRAP(regs) == 0xd00) |
| ppc_inst_dump(regs->nip, 1, 0); |
| printf("enter ? for help\n"); |
| mb(); |
| xmon_gate = 1; |
| barrier(); |
| } |
| |
| cmdloop: |
| while (in_xmon) { |
| if (secondary) { |
| if (cpu == xmon_owner) { |
| if (!test_and_set_bit(0, &xmon_taken)) { |
| secondary = 0; |
| continue; |
| } |
| /* missed it */ |
| while (cpu == xmon_owner) |
| barrier(); |
| } |
| barrier(); |
| } else { |
| cmd = cmds(regs); |
| if (cmd != 0) { |
| /* exiting xmon */ |
| insert_bpts(); |
| xmon_gate = 0; |
| wmb(); |
| in_xmon = 0; |
| break; |
| } |
| /* have switched to some other cpu */ |
| secondary = 1; |
| } |
| } |
| leave: |
| cpumask_clear_cpu(cpu, &cpus_in_xmon); |
| xmon_fault_jmp[cpu] = NULL; |
| #else |
| /* UP is simple... */ |
| if (in_xmon) { |
| printf("Exception %lx %s in xmon, returning to main loop\n", |
| regs->trap, getvecname(TRAP(regs))); |
| longjmp(xmon_fault_jmp[0], 1); |
| } |
| if (setjmp(recurse_jmp) == 0) { |
| xmon_fault_jmp[0] = recurse_jmp; |
| in_xmon = 1; |
| |
| excprint(regs); |
| bp = at_breakpoint(regs->nip); |
| if (bp) { |
| printf("Stopped at breakpoint %x (", BP_NUM(bp)); |
| xmon_print_symbol(regs->nip, " ", ")\n"); |
| } |
| if (unrecoverable_excp(regs)) |
| printf("WARNING: exception is not recoverable, " |
| "can't continue\n"); |
| remove_bpts(); |
| disable_surveillance(); |
| /* for breakpoint or single step, print the current instr. */ |
| if (bp || TRAP(regs) == 0xd00) |
| ppc_inst_dump(regs->nip, 1, 0); |
| printf("enter ? for help\n"); |
| } |
| |
| cmd = cmds(regs); |
| |
| insert_bpts(); |
| in_xmon = 0; |
| #endif |
| |
| #ifdef CONFIG_BOOKE |
| if (regs->msr & MSR_DE) { |
| bp = at_breakpoint(regs->nip); |
| if (bp != NULL) { |
| regs->nip = (unsigned long) &bp->instr[0]; |
| atomic_inc(&bp->ref_count); |
| } |
| } |
| #else |
| if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) { |
| bp = at_breakpoint(regs->nip); |
| if (bp != NULL) { |
| int stepped = emulate_step(regs, bp->instr[0]); |
| if (stepped == 0) { |
| regs->nip = (unsigned long) &bp->instr[0]; |
| atomic_inc(&bp->ref_count); |
| } else if (stepped < 0) { |
| printf("Couldn't single-step %s instruction\n", |
| (IS_RFID(bp->instr[0])? "rfid": "mtmsrd")); |
| } |
| } |
| } |
| #endif |
| insert_cpu_bpts(); |
| |
| local_irq_restore(flags); |
| |
| return cmd != 'X' && cmd != EOF; |
| } |
| |
| int xmon(struct pt_regs *excp) |
| { |
| struct pt_regs regs; |
| |
| if (excp == NULL) { |
| ppc_save_regs(®s); |
| excp = ®s; |
| } |
| |
| return xmon_core(excp, 0); |
| } |
| EXPORT_SYMBOL(xmon); |
| |
| irqreturn_t xmon_irq(int irq, void *d) |
| { |
| unsigned long flags; |
| local_irq_save(flags); |
| printf("Keyboard interrupt\n"); |
| xmon(get_irq_regs()); |
| local_irq_restore(flags); |
| return IRQ_HANDLED; |
| } |
| |
| static int xmon_bpt(struct pt_regs *regs) |
| { |
| struct bpt *bp; |
| unsigned long offset; |
| |
| if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
| return 0; |
| |
| /* Are we at the trap at bp->instr[1] for some bp? */ |
| bp = in_breakpoint_table(regs->nip, &offset); |
| if (bp != NULL && offset == 4) { |
| regs->nip = bp->address + 4; |
| atomic_dec(&bp->ref_count); |
| return 1; |
| } |
| |
| /* Are we at a breakpoint? */ |
| bp = at_breakpoint(regs->nip); |
| if (!bp) |
| return 0; |
| |
| xmon_core(regs, 0); |
| |
| return 1; |
| } |
| |
| static int xmon_sstep(struct pt_regs *regs) |
| { |
| if (user_mode(regs)) |
| return 0; |
| xmon_core(regs, 0); |
| return 1; |
| } |
| |
| static int xmon_dabr_match(struct pt_regs *regs) |
| { |
| if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
| return 0; |
| if (dabr.enabled == 0) |
| return 0; |
| xmon_core(regs, 0); |
| return 1; |
| } |
| |
| static int xmon_iabr_match(struct pt_regs *regs) |
| { |
| if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
| return 0; |
| if (iabr == NULL) |
| return 0; |
| xmon_core(regs, 0); |
| return 1; |
| } |
| |
| static int xmon_ipi(struct pt_regs *regs) |
| { |
| #ifdef CONFIG_SMP |
| if (in_xmon && !cpumask_test_cpu(smp_processor_id(), &cpus_in_xmon)) |
| xmon_core(regs, 1); |
| #endif |
| return 0; |
| } |
| |
| static int xmon_fault_handler(struct pt_regs *regs) |
| { |
| struct bpt *bp; |
| unsigned long offset; |
| |
| if (in_xmon && catch_memory_errors) |
| handle_fault(regs); /* doesn't return */ |
| |
| if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) { |
| bp = in_breakpoint_table(regs->nip, &offset); |
| if (bp != NULL) { |
| regs->nip = bp->address + offset; |
| atomic_dec(&bp->ref_count); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static struct bpt *at_breakpoint(unsigned long pc) |
| { |
| int i; |
| struct bpt *bp; |
| |
| bp = bpts; |
| for (i = 0; i < NBPTS; ++i, ++bp) |
| if (bp->enabled && pc == bp->address) |
| return bp; |
| return NULL; |
| } |
| |
| static struct bpt *in_breakpoint_table(unsigned long nip, unsigned long *offp) |
| { |
| unsigned long off; |
| |
| off = nip - (unsigned long) bpts; |
| if (off >= sizeof(bpts)) |
| return NULL; |
| off %= sizeof(struct bpt); |
| if (off != offsetof(struct bpt, instr[0]) |
| && off != offsetof(struct bpt, instr[1])) |
| return NULL; |
| *offp = off - offsetof(struct bpt, instr[0]); |
| return (struct bpt *) (nip - off); |
| } |
| |
| static struct bpt *new_breakpoint(unsigned long a) |
| { |
| struct bpt *bp; |
| |
| a &= ~3UL; |
| bp = at_breakpoint(a); |
| if (bp) |
| return bp; |
| |
| for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { |
| if (!bp->enabled && atomic_read(&bp->ref_count) == 0) { |
| bp->address = a; |
| bp->instr[1] = bpinstr; |
| store_inst(&bp->instr[1]); |
| return bp; |
| } |
| } |
| |
| printf("Sorry, no free breakpoints. Please clear one first.\n"); |
| return NULL; |
| } |
| |
| static void insert_bpts(void) |
| { |
| int i; |
| struct bpt *bp; |
| |
| bp = bpts; |
| for (i = 0; i < NBPTS; ++i, ++bp) { |
| if ((bp->enabled & (BP_TRAP|BP_IABR)) == 0) |
| continue; |
| if (mread(bp->address, &bp->instr[0], 4) != 4) { |
| printf("Couldn't read instruction at %lx, " |
| "disabling breakpoint there\n", bp->address); |
| bp->enabled = 0; |
| continue; |
| } |
| if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) { |
| printf("Breakpoint at %lx is on an mtmsrd or rfid " |
| "instruction, disabling it\n", bp->address); |
| bp->enabled = 0; |
| continue; |
| } |
| store_inst(&bp->instr[0]); |
| if (bp->enabled & BP_IABR) |
| continue; |
| if (mwrite(bp->address, &bpinstr, 4) != 4) { |
| printf("Couldn't write instruction at %lx, " |
| "disabling breakpoint there\n", bp->address); |
| bp->enabled &= ~BP_TRAP; |
| continue; |
| } |
| store_inst((void *)bp->address); |
| } |
| } |
| |
| static void insert_cpu_bpts(void) |
| { |
| if (dabr.enabled) |
| set_dabr(dabr.address | (dabr.enabled & 7)); |
| if (iabr && cpu_has_feature(CPU_FTR_IABR)) |
| mtspr(SPRN_IABR, iabr->address |
| | (iabr->enabled & (BP_IABR|BP_IABR_TE))); |
| } |
| |
| static void remove_bpts(void) |
| { |
| int i; |
| struct bpt *bp; |
| unsigned instr; |
| |
| bp = bpts; |
| for (i = 0; i < NBPTS; ++i, ++bp) { |
| if ((bp->enabled & (BP_TRAP|BP_IABR)) != BP_TRAP) |
| continue; |
| if (mread(bp->address, &instr, 4) == 4 |
| && instr == bpinstr |
| && mwrite(bp->address, &bp->instr, 4) != 4) |
| printf("Couldn't remove breakpoint at %lx\n", |
| bp->address); |
| else |
| store_inst((void *)bp->address); |
| } |
| } |
| |
| static void remove_cpu_bpts(void) |
| { |
| set_dabr(0); |
| if (cpu_has_feature(CPU_FTR_IABR)) |
| mtspr(SPRN_IABR, 0); |
| } |
| |
| /* Command interpreting routine */ |
| static char *last_cmd; |
| |
| static int |
| cmds(struct pt_regs *excp) |
| { |
| int cmd = 0; |
| |
| last_cmd = NULL; |
| xmon_regs = excp; |
| |
| if (!xmon_no_auto_backtrace) { |
| xmon_no_auto_backtrace = 1; |
| xmon_show_stack(excp->gpr[1], excp->link, excp->nip); |
| } |
| |
| for(;;) { |
| #ifdef CONFIG_SMP |
| printf("%x:", smp_processor_id()); |
| #endif /* CONFIG_SMP */ |
| printf("mon> "); |
| flush_input(); |
| termch = 0; |
| cmd = skipbl(); |
| if( cmd == '\n' ) { |
| if (last_cmd == NULL) |
| continue; |
| take_input(last_cmd); |
| last_cmd = NULL; |
| cmd = inchar(); |
| } |
| switch (cmd) { |
| case 'm': |
| cmd = inchar(); |
| switch (cmd) { |
| case 'm': |
| case 's': |
| case 'd': |
| memops(cmd); |
| break; |
| case 'l': |
| memlocate(); |
| break; |
| case 'z': |
| memzcan(); |
| break; |
| case 'i': |
| show_mem(0); |
| break; |
| default: |
| termch = cmd; |
| memex(); |
| } |
| break; |
| case 'd': |
| dump(); |
| break; |
| case 'l': |
| symbol_lookup(); |
| break; |
| case 'r': |
| prregs(excp); /* print regs */ |
| break; |
| case 'e': |
| excprint(excp); |
| break; |
| case 'S': |
| super_regs(); |
| break; |
| case 't': |
| backtrace(excp); |
| break; |
| case 'f': |
| cacheflush(); |
| break; |
| case 's': |
| if (do_spu_cmd() == 0) |
| break; |
| if (do_step(excp)) |
| return cmd; |
| break; |
| case 'x': |
| case 'X': |
| return cmd; |
| case EOF: |
| printf(" <no input ...>\n"); |
| mdelay(2000); |
| return cmd; |
| case '?': |
| xmon_puts(help_string); |
| break; |
| case 'b': |
| bpt_cmds(); |
| break; |
| case 'C': |
| csum(); |
| break; |
| case 'c': |
| if (cpu_cmd()) |
| return 0; |
| break; |
| case 'z': |
| bootcmds(); |
| break; |
| case 'p': |
| proccall(); |
| break; |
| #ifdef CONFIG_PPC_STD_MMU |
| case 'u': |
| dump_segments(); |
| break; |
| #endif |
| #ifdef CONFIG_4xx |
| case 'u': |
| dump_tlb_44x(); |
| break; |
| #endif |
| #ifdef CONFIG_PPC_BOOK3E |
| case 'u': |
| dump_tlb_book3e(); |
| break; |
| #endif |
| default: |
| printf("Unrecognized command: "); |
| do { |
| if (' ' < cmd && cmd <= '~') |
| putchar(cmd); |
| else |
| printf("\\x%x", cmd); |
| cmd = inchar(); |
| } while (cmd != '\n'); |
| printf(" (type ? for help)\n"); |
| break; |
| } |
| } |
| } |
| |
| #ifdef CONFIG_BOOKE |
| static int do_step(struct pt_regs *regs) |
| { |
| regs->msr |= MSR_DE; |
| mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); |
| return 1; |
| } |
| #else |
| /* |
| * Step a single instruction. |
| * Some instructions we emulate, others we execute with MSR_SE set. |
| */ |
| static int do_step(struct pt_regs *regs) |
| { |
| unsigned int instr; |
| int stepped; |
| |
| /* check we are in 64-bit kernel mode, translation enabled */ |
| if ((regs->msr & (MSR_64BIT|MSR_PR|MSR_IR)) == (MSR_64BIT|MSR_IR)) { |
| if (mread(regs->nip, &instr, 4) == 4) { |
| stepped = emulate_step(regs, instr); |
| if (stepped < 0) { |
| printf("Couldn't single-step %s instruction\n", |
| (IS_RFID(instr)? "rfid": "mtmsrd")); |
| return 0; |
| } |
| if (stepped > 0) { |
| regs->trap = 0xd00 | (regs->trap & 1); |
| printf("stepped to "); |
| xmon_print_symbol(regs->nip, " ", "\n"); |
| ppc_inst_dump(regs->nip, 1, 0); |
| return 0; |
| } |
| } |
| } |
| regs->msr |= MSR_SE; |
| return 1; |
| } |
| #endif |
| |
| static void bootcmds(void) |
| { |
| int cmd; |
| |
| cmd = inchar(); |
| if (cmd == 'r') |
| ppc_md.restart(NULL); |
| else if (cmd == 'h') |
| ppc_md.halt(); |
| else if (cmd == 'p') |
| ppc_md.power_off(); |
| } |
| |
| static int cpu_cmd(void) |
| { |
| #ifdef CONFIG_SMP |
| unsigned long cpu; |
| int timeout; |
| int count; |
| |
| if (!scanhex(&cpu)) { |
| /* print cpus waiting or in xmon */ |
| printf("cpus stopped:"); |
| count = 0; |
| for (cpu = 0; cpu < NR_CPUS; ++cpu) { |
| if (cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
| if (count == 0) |
| printf(" %x", cpu); |
| ++count; |
| } else { |
| if (count > 1) |
| printf("-%x", cpu - 1); |
| count = 0; |
| } |
| } |
| if (count > 1) |
| printf("-%x", NR_CPUS - 1); |
| printf("\n"); |
| return 0; |
| } |
| /* try to switch to cpu specified */ |
| if (!cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
| printf("cpu 0x%x isn't in xmon\n", cpu); |
| return 0; |
| } |
| xmon_taken = 0; |
| mb(); |
| xmon_owner = cpu; |
| timeout = 10000000; |
| while (!xmon_taken) { |
| if (--timeout == 0) { |
| if (test_and_set_bit(0, &xmon_taken)) |
| break; |
| /* take control back */ |
| mb(); |
| xmon_owner = smp_processor_id(); |
| printf("cpu %u didn't take control\n", cpu); |
| return 0; |
| } |
| barrier(); |
| } |
| return 1; |
| #else |
| return 0; |
| #endif /* CONFIG_SMP */ |
| } |
| |
| static unsigned short fcstab[256] = { |
| 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, |
| 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, |
| 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, |
| 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, |
| 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, |
| 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, |
| 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, |
| 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, |
| 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, |
| 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, |
| 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, |
| 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, |
| 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, |
| 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, |
| 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, |
| 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, |
| 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, |
| 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, |
| 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, |
| 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, |
| 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, |
| 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, |
| 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, |
| 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, |
| 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, |
| 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, |
| 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, |
| 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, |
| 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, |
| 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, |
| 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, |
| 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 |
| }; |
| |
| #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) |
| |
| static void |
| csum(void) |
| { |
| unsigned int i; |
| unsigned short fcs; |
| unsigned char v; |
| |
| if (!scanhex(&adrs)) |
| return; |
| if (!scanhex(&ncsum)) |
| return; |
| fcs = 0xffff; |
| for (i = 0; i < ncsum; ++i) { |
| if (mread(adrs+i, &v, 1) == 0) { |
| printf("csum stopped at %x\n", adrs+i); |
| break; |
| } |
| fcs = FCS(fcs, v); |
| } |
| printf("%x\n", fcs); |
| } |
| |
| /* |
| * Check if this is a suitable place to put a breakpoint. |
| */ |
| static long check_bp_loc(unsigned long addr) |
| { |
| unsigned int instr; |
| |
| addr &= ~3; |
| if (!is_kernel_addr(addr)) { |
| printf("Breakpoints may only be placed at kernel addresses\n"); |
| return 0; |
| } |
| if (!mread(addr, &instr, sizeof(instr))) { |
| printf("Can't read instruction at address %lx\n", addr); |
| return 0; |
| } |
| if (IS_MTMSRD(instr) || IS_RFID(instr)) { |
| printf("Breakpoints may not be placed on mtmsrd or rfid " |
| "instructions\n"); |
| return 0; |
| } |
| return 1; |
| } |
| |
| static char *breakpoint_help_string = |
| "Breakpoint command usage:\n" |
| "b show breakpoints\n" |
| "b <addr> [cnt] set breakpoint at given instr addr\n" |
| "bc clear all breakpoints\n" |
| "bc <n/addr> clear breakpoint number n or at addr\n" |
| "bi <addr> [cnt] set hardware instr breakpoint (POWER3/RS64 only)\n" |
| "bd <addr> [cnt] set hardware data breakpoint\n" |
| ""; |
| |
| static void |
| bpt_cmds(void) |
| { |
| int cmd; |
| unsigned long a; |
| int mode, i; |
| struct bpt *bp; |
| const char badaddr[] = "Only kernel addresses are permitted " |
| "for breakpoints\n"; |
| |
| cmd = inchar(); |
| switch (cmd) { |
| #ifndef CONFIG_8xx |
| case 'd': /* bd - hardware data breakpoint */ |
| mode = 7; |
| cmd = inchar(); |
| if (cmd == 'r') |
| mode = 5; |
| else if (cmd == 'w') |
| mode = 6; |
| else |
| termch = cmd; |
| dabr.address = 0; |
| dabr.enabled = 0; |
| if (scanhex(&dabr.address)) { |
| if (!is_kernel_addr(dabr.address)) { |
| printf(badaddr); |
| break; |
| } |
| dabr.address &= ~7; |
| dabr.enabled = mode | BP_DABR; |
| } |
| break; |
| |
| case 'i': /* bi - hardware instr breakpoint */ |
| if (!cpu_has_feature(CPU_FTR_IABR)) { |
| printf("Hardware instruction breakpoint " |
| "not supported on this cpu\n"); |
| break; |
| } |
| if (iabr) { |
| iabr->enabled &= ~(BP_IABR | BP_IABR_TE); |
| iabr = NULL; |
| } |
| if (!scanhex(&a)) |
| break; |
| if (!check_bp_loc(a)) |
| break; |
| bp = new_breakpoint(a); |
| if (bp != NULL) { |
| bp->enabled |= BP_IABR | BP_IABR_TE; |
| iabr = bp; |
| } |
| break; |
| #endif |
| |
| case 'c': |
| if (!scanhex(&a)) { |
| /* clear all breakpoints */ |
| for (i = 0; i < NBPTS; ++i) |
| bpts[i].enabled = 0; |
| iabr = NULL; |
| dabr.enabled = 0; |
| printf("All breakpoints cleared\n"); |
| break; |
| } |
| |
| if (a <= NBPTS && a >= 1) { |
| /* assume a breakpoint number */ |
| bp = &bpts[a-1]; /* bp nums are 1 based */ |
| } else { |
| /* assume a breakpoint address */ |
| bp = at_breakpoint(a); |
| if (bp == NULL) { |
| printf("No breakpoint at %x\n", a); |
| break; |
| } |
| } |
| |
| printf("Cleared breakpoint %x (", BP_NUM(bp)); |
| xmon_print_symbol(bp->address, " ", ")\n"); |
| bp->enabled = 0; |
| break; |
| |
| default: |
| termch = cmd; |
| cmd = skipbl(); |
| if (cmd == '?') { |
| printf(breakpoint_help_string); |
| break; |
| } |
| termch = cmd; |
| if (!scanhex(&a)) { |
| /* print all breakpoints */ |
| printf(" type address\n"); |
| if (dabr.enabled) { |
| printf(" data "REG" [", dabr.address); |
| if (dabr.enabled & 1) |
| printf("r"); |
| if (dabr.enabled & 2) |
| printf("w"); |
| printf("]\n"); |
| } |
| for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { |
| if (!bp->enabled) |
| continue; |
| printf("%2x %s ", BP_NUM(bp), |
| (bp->enabled & BP_IABR)? "inst": "trap"); |
| xmon_print_symbol(bp->address, " ", "\n"); |
| } |
| break; |
| } |
| |
| if (!check_bp_loc(a)) |
| break; |
| bp = new_breakpoint(a); |
| if (bp != NULL) |
| bp->enabled |= BP_TRAP; |
| break; |
| } |
| } |
| |
| /* Very cheap human name for vector lookup. */ |
| static |
| const char *getvecname(unsigned long vec) |
| { |
| char *ret; |
| |
| switch (vec) { |
| case 0x100: ret = "(System Reset)"; break; |
| case 0x200: ret = "(Machine Check)"; break; |
| case 0x300: ret = "(Data Access)"; break; |
| case 0x380: ret = "(Data SLB Access)"; break; |
| case 0x400: ret = "(Instruction Access)"; break; |
| case 0x480: ret = "(Instruction SLB Access)"; break; |
| case 0x500: ret = "(Hardware Interrupt)"; break; |
| case 0x600: ret = "(Alignment)"; break; |
| case 0x700: ret = "(Program Check)"; break; |
| case 0x800: ret = "(FPU Unavailable)"; break; |
| case 0x900: ret = "(Decrementer)"; break; |
| case 0xc00: ret = "(System Call)"; break; |
| case 0xd00: ret = "(Single Step)"; break; |
| case 0xf00: ret = "(Performance Monitor)"; break; |
| case 0xf20: ret = "(Altivec Unavailable)"; break; |
| case 0x1300: ret = "(Instruction Breakpoint)"; break; |
| default: ret = ""; |
| } |
| return ret; |
| } |
| |
| static void get_function_bounds(unsigned long pc, unsigned long *startp, |
| unsigned long *endp) |
| { |
| unsigned long size, offset; |
| const char *name; |
| |
| *startp = *endp = 0; |
| if (pc == 0) |
| return; |
| if (setjmp(bus_error_jmp) == 0) { |
| catch_memory_errors = 1; |
| sync(); |
| name = kallsyms_lookup(pc, &size, &offset, NULL, tmpstr); |
| if (name != NULL) { |
| *startp = pc - offset; |
| *endp = pc - offset + size; |
| } |
| sync(); |
| } |
| catch_memory_errors = 0; |
| } |
| |
| static int xmon_depth_to_print = 64; |
| |
| #define LRSAVE_OFFSET (STACK_FRAME_LR_SAVE * sizeof(unsigned long)) |
| #define MARKER_OFFSET (STACK_FRAME_MARKER * sizeof(unsigned long)) |
| |
| #ifdef __powerpc64__ |
| #define REGS_OFFSET 0x70 |
| #else |
| #define REGS_OFFSET 16 |
| #endif |
| |
| static void xmon_show_stack(unsigned long sp, unsigned long lr, |
| unsigned long pc) |
| { |
| unsigned long ip; |
| unsigned long newsp; |
| unsigned long marker; |
| int count = 0; |
| struct pt_regs regs; |
| |
| do { |
| if (sp < PAGE_OFFSET) { |
| if (sp != 0) |
| printf("SP (%lx) is in userspace\n", sp); |
| break; |
| } |
| |
| if (!mread(sp + LRSAVE_OFFSET, &ip, sizeof(unsigned long)) |
| || !mread(sp, &newsp, sizeof(unsigned long))) { |
| printf("Couldn't read stack frame at %lx\n", sp); |
| break; |
| } |
| |
| /* |
| * For the first stack frame, try to work out if |
| * LR and/or the saved LR value in the bottommost |
| * stack frame are valid. |
| */ |
| if ((pc | lr) != 0) { |
| unsigned long fnstart, fnend; |
| unsigned long nextip; |
| int printip = 1; |
| |
| get_function_bounds(pc, &fnstart, &fnend); |
| nextip = 0; |
| if (newsp > sp) |
| mread(newsp + LRSAVE_OFFSET, &nextip, |
| sizeof(unsigned long)); |
| if (lr == ip) { |
| if (lr < PAGE_OFFSET |
| || (fnstart <= lr && lr < fnend)) |
| printip = 0; |
| } else if (lr == nextip) { |
| printip = 0; |
| } else if (lr >= PAGE_OFFSET |
| && !(fnstart <= lr && lr < fnend)) { |
| printf("[link register ] "); |
| xmon_print_symbol(lr, " ", "\n"); |
| } |
| if (printip) { |
| printf("["REG"] ", sp); |
| xmon_print_symbol(ip, " ", " (unreliable)\n"); |
| } |
| pc = lr = 0; |
| |
| } else { |
| printf("["REG"] ", sp); |
| xmon_print_symbol(ip, " ", "\n"); |
| } |
| |
| /* Look for "regshere" marker to see if this is |
| an exception frame. */ |
| if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long)) |
| && marker == STACK_FRAME_REGS_MARKER) { |
| if (mread(sp + REGS_OFFSET, ®s, sizeof(regs)) |
| != sizeof(regs)) { |
| printf("Couldn't read registers at %lx\n", |
| sp + REGS_OFFSET); |
| break; |
| } |
| printf("--- Exception: %lx %s at ", regs.trap, |
| getvecname(TRAP(®s))); |
| pc = regs.nip; |
| lr = regs.link; |
| xmon_print_symbol(pc, " ", "\n"); |
| } |
| |
| if (newsp == 0) |
| break; |
| |
| sp = newsp; |
| } while (count++ < xmon_depth_to_print); |
| } |
| |
| static void backtrace(struct pt_regs *excp) |
| { |
| unsigned long sp; |
| |
| if (scanhex(&sp)) |
| xmon_show_stack(sp, 0, 0); |
| else |
| xmon_show_stack(excp->gpr[1], excp->link, excp->nip); |
| scannl(); |
| } |
| |
| static void print_bug_trap(struct pt_regs *regs) |
| { |
| #ifdef CONFIG_BUG |
| const struct bug_entry *bug; |
| unsigned long addr; |
| |
| if (regs->msr & MSR_PR) |
| return; /* not in kernel */ |
| addr = regs->nip; /* address of trap instruction */ |
| if (addr < PAGE_OFFSET) |
| return; |
| bug = find_bug(regs->nip); |
| if (bug == NULL) |
| return; |
| if (is_warning_bug(bug)) |
| return; |
| |
| #ifdef CONFIG_DEBUG_BUGVERBOSE |
| printf("kernel BUG at %s:%u!\n", |
| bug->file, bug->line); |
| #else |
| printf("kernel BUG at %p!\n", (void *)bug->bug_addr); |
| #endif |
| #endif /* CONFIG_BUG */ |
| } |
| |
| static void excprint(struct pt_regs *fp) |
| { |
| unsigned long trap; |
| |
| #ifdef CONFIG_SMP |
| printf("cpu 0x%x: ", smp_processor_id()); |
| #endif /* CONFIG_SMP */ |
| |
| trap = TRAP(fp); |
| printf("Vector: %lx %s at [%lx]\n", fp->trap, getvecname(trap), fp); |
| printf(" pc: "); |
| xmon_print_symbol(fp->nip, ": ", "\n"); |
| |
| printf(" lr: ", fp->link); |
| xmon_print_symbol(fp->link, ": ", "\n"); |
| |
| printf(" sp: %lx\n", fp->gpr[1]); |
| printf(" msr: %lx\n", fp->msr); |
| |
| if (trap == 0x300 || trap == 0x380 || trap == 0x600) { |
| printf(" dar: %lx\n", fp->dar); |
| if (trap != 0x380) |
| printf(" dsisr: %lx\n", fp->dsisr); |
| } |
| |
| printf(" current = 0x%lx\n", current); |
| #ifdef CONFIG_PPC64 |
| printf(" paca = 0x%lx\n", get_paca()); |
| #endif |
| if (current) { |
| printf(" pid = %ld, comm = %s\n", |
| current->pid, current->comm); |
| } |
| |
| if (trap == 0x700) |
| print_bug_trap(fp); |
| } |
| |
| static void prregs(struct pt_regs *fp) |
| { |
| int n, trap; |
| unsigned long base; |
| struct pt_regs regs; |
| |
| if (scanhex(&base)) { |
| if (setjmp(bus_error_jmp) == 0) { |
| catch_memory_errors = 1; |
| sync(); |
| regs = *(struct pt_regs *)base; |
| sync(); |
| __delay(200); |
| } else { |
| catch_memory_errors = 0; |
| printf("*** Error reading registers from "REG"\n", |
| base); |
| return; |
| } |
| catch_memory_errors = 0; |
| fp = ®s; |
| } |
| |
| #ifdef CONFIG_PPC64 |
| if (FULL_REGS(fp)) { |
| for (n = 0; n < 16; ++n) |
| printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
| n, fp->gpr[n], n+16, fp->gpr[n+16]); |
| } else { |
| for (n = 0; n < 7; ++n) |
| printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
| n, fp->gpr[n], n+7, fp->gpr[n+7]); |
| } |
| #else |
| for (n = 0; n < 32; ++n) { |
| printf("R%.2d = %.8x%s", n, fp->gpr[n], |
| (n & 3) == 3? "\n": " "); |
| if (n == 12 && !FULL_REGS(fp)) { |
| printf("\n"); |
| break; |
| } |
| } |
| #endif |
| printf("pc = "); |
| xmon_print_symbol(fp->nip, " ", "\n"); |
| if (TRAP(fp) != 0xc00 && cpu_has_feature(CPU_FTR_CFAR)) { |
| printf("cfar= "); |
| xmon_print_symbol(fp->orig_gpr3, " ", "\n"); |
| } |
| printf("lr = "); |
| xmon_print_symbol(fp->link, " ", "\n"); |
| printf("msr = "REG" cr = %.8lx\n", fp->msr, fp->ccr); |
| printf("ctr = "REG" xer = "REG" trap = %4lx\n", |
| fp->ctr, fp->xer, fp->trap); |
| trap = TRAP(fp); |
| if (trap == 0x300 || trap == 0x380 || trap == 0x600) |
| printf("dar = "REG" dsisr = %.8lx\n", fp->dar, fp->dsisr); |
| } |
| |
| static void cacheflush(void) |
| { |
| int cmd; |
| unsigned long nflush; |
| |
| cmd = inchar(); |
| if (cmd != 'i') |
| termch = cmd; |
| scanhex((void *)&adrs); |
| if (termch != '\n') |
| termch = 0; |
| nflush = 1; |
| scanhex(&nflush); |
| nflush = (nflush + L1_CACHE_BYTES - 1) / L1_CACHE_BYTES; |
| if (setjmp(bus_error_jmp) == 0) { |
| catch_memory_errors = 1; |
| sync(); |
| |
| if (cmd != 'i') { |
| for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) |
| cflush((void *) adrs); |
| } else { |
| for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) |
| cinval((void *) adrs); |
| } |
| sync(); |
| /* wait a little while to see if we get a machine check */ |
| __delay(200); |
| } |
| catch_memory_errors = 0; |
| } |
| |
| static unsigned long |
| read_spr(int n) |
| { |
| unsigned int instrs[2]; |
| unsigned long (*code)(void); |
| unsigned long ret = -1UL; |
| #ifdef CONFIG_PPC64 |
| unsigned long opd[3]; |
| |
| opd[0] = (unsigned long)instrs; |
| opd[1] = 0; |
| opd[2] = 0; |
| code = (unsigned long (*)(void)) opd; |
| #else |
| code = (unsigned long (*)(void)) instrs; |
| #endif |
| |
| /* mfspr r3,n; blr */ |
| instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); |
| instrs[1] = 0x4e800020; |
| store_inst(instrs); |
| store_inst(instrs+1); |
| |
| if (setjmp(bus_error_jmp) == 0) { |
| catch_memory_errors = 1; |
| sync(); |
| |
| ret = code(); |
| |
| sync(); |
| /* wait a little while to see if we get a machine check */ |
| __delay(200); |
| n = size; |
| } |
| |
| return ret; |
| } |
| |
| static void |
| write_spr(int n, unsigned long val) |
| { |
| unsigned int instrs[2]; |
| unsigned long (*code)(unsigned long); |
| #ifdef CONFIG_PPC64 |
| unsigned long opd[3]; |
| |
| opd[0] = (unsigned long)instrs; |
| opd[1] = 0; |
| opd[2] = 0; |
| code = (unsigned long (*)(unsigned long)) opd; |
| #else |
| code = (unsigned long (*)(unsigned long)) instrs; |
| #endif |
| |
| instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); |
| instrs[1] = 0x4e800020; |
| store_inst(instrs); |
| store_inst(instrs+1); |
| |
| if (setjmp(bus_error_jmp) == 0) { |
| catch_memory_errors = 1; |
| sync(); |
| |
| code(val); |
| |
| sync(); |
| /* wait a little while to see if we get a machine check */ |
| __delay(200); |
| n = size; |
| } |
| } |
| |
| static unsigned long regno; |
| extern char exc_prolog; |
| extern char dec_exc; |
| |
| static void super_regs(void) |
| { |
| int cmd; |
| unsigned long val; |
| |
| cmd = skipbl(); |
| if (cmd == '\n') { |
| unsigned long sp, toc; |
| asm("mr %0,1" : "=r" (sp) :); |
| asm("mr %0,2" : "=r" (toc) :); |
| |
| printf("msr = "REG" sprg0= "REG"\n", |
| mfmsr(), mfspr(SPRN_SPRG0)); |
| printf("pvr = "REG" sprg1= "REG"\n", |
| mfspr(SPRN_PVR), mfspr(SPRN_SPRG1)); |
| printf("dec = "REG" sprg2= "REG"\n", |
| mfspr(SPRN_DEC), mfspr(SPRN_SPRG2)); |
| printf("sp = "REG" sprg3= "REG"\n", sp, mfspr(SPRN_SPRG3)); |
| printf("toc = "REG" dar = "REG"\n", toc, mfspr(SPRN_DAR)); |
| #ifdef CONFIG_PPC_ISERIES |
| if (firmware_has_feature(FW_FEATURE_ISERIES)) { |
| struct paca_struct *ptrPaca; |
| struct lppaca *ptrLpPaca; |
| |
| /* Dump out relevant Paca data areas. */ |
| printf("Paca: \n"); |
| ptrPaca = get_paca(); |
| |
| printf(" Local Processor Control Area (LpPaca): \n"); |
| ptrLpPaca = ptrPaca->lppaca_ptr; |
| printf(" Saved Srr0=%.16lx Saved Srr1=%.16lx \n", |
| ptrLpPaca->saved_srr0, ptrLpPaca->saved_srr1); |
| printf(" Saved Gpr3=%.16lx Saved Gpr4=%.16lx \n", |
| ptrLpPaca->saved_gpr3, ptrLpPaca->saved_gpr4); |
| printf(" Saved Gpr5=%.16lx \n", |
| ptrLpPaca->gpr5_dword.saved_gpr5); |
| } |
| #endif |
| |
| return; |
| } |
| |
| scanhex(®no); |
| switch (cmd) { |
| case 'w': |
| val = read_spr(regno); |
| scanhex(&val); |
| write_spr(regno, val); |
| /* fall through */ |
| case 'r': |
| printf("spr %lx = %lx\n", regno, read_spr(regno)); |
| break; |
| } |
| scannl(); |
| } |
| |
| /* |
| * Stuff for reading and writing memory safely |
| */ |
| static int |
| mread(unsigned long adrs, void *buf, int size) |
| { |
| volatile int n; |
| char *p, *q; |
| |
| n = 0; |
| if (setjmp(bus_error_jmp) == 0) { |
| catch_memory_errors = 1; |
| sync(); |
| p = (char *)adrs; |
| q = (char *)buf; |
| switch (size) { |
| case 2: |
| *(u16 *)q = *(u16 *)p; |
| break; |
| case 4: |
| *(u32 *)q = *(u32 *)p; |
| break; |
| case 8: |
| *(u64 *)q = *(u64 *)p; |
| break; |
| default: |
| for( ; n < size; ++n) { |
| *q++ = *p++; |
| sync(); |
| } |
| } |
| sync(); |
| /* wait a little while to see if we get a machine check */ |
| __delay(200); |
| n = size; |
| } |
| catch_memory_errors = 0; |
| return n; |
| } |
| |
| static int |
| mwrite(unsigned long adrs, void *buf, int size) |
| { |
| volatile int n; |
| char *p, *q; |
| |
| n = 0; |
| if (setjmp(bus_error_jmp) == 0) { |
| catch_memory_errors = 1; |
| sync(); |
| p = (char *) adrs; |
| q = (char *) buf; |
| switch (size) { |
| case 2: |
| *(u16 *)p = *(u16 *)q; |
| break; |
| case 4: |
| *(u32 *)p = *(u32 *)q; |
| break; |
| case 8: |
| *(u64 *)p = *(u64 *)q; |
| break; |
| default: |
| for ( ; n < size; ++n) { |
| *p++ = *q++; |
| sync(); |
| } |
| } |
| sync(); |
| /* wait a little while to see if we get a machine check */ |
| __delay(200); |
| n = size; |
| } else { |
| printf("*** Error writing address %x\n", adrs + n); |
| } |
| catch_memory_errors = 0; |
| return n; |
| } |
| |
| static int fault_type; |
| static int fault_except; |
| static char *fault_chars[] = { "--", "**", "##" }; |
| |
| static int handle_fault(struct pt_regs *regs) |
| { |
| fault_except = TRAP(regs); |
| switch (TRAP(regs)) { |
| case 0x200: |
| fault_type = 0; |
| break; |
| case 0x300: |
| case 0x380: |
| fault_type = 1; |
| break; |
| default: |
| fault_type = 2; |
| } |
| |
| longjmp(bus_error_jmp, 1); |
| |
| return 0; |
| } |
| |
| #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) |
| |
| static void |
| byterev(unsigned char *val, int size) |
| { |
| int t; |
| |
| switch (size) { |
| case 2: |
| SWAP(val[0], val[1], t); |
| break; |
| case 4: |
| SWAP(val[0], val[3], t); |
| SWAP(val[1], val[2], t); |
| break; |
| case 8: /* is there really any use for this? */ |
| SWAP(val[0], val[7], t); |
| SWAP(val[1], val[6], t); |
| SWAP(val[2], val[5], t); |
| SWAP(val[3], val[4], t); |
| break; |
| } |
| } |
| |
| static int brev; |
| static int mnoread; |
| |
| static char *memex_help_string = |
| "Memory examine command usage:\n" |
| "m [addr] [flags] examine/change memory\n" |
| " addr is optional. will start where left off.\n" |
| " flags may include chars from this set:\n" |
| " b modify by bytes (default)\n" |
| " w modify by words (2 byte)\n" |
| " l modify by longs (4 byte)\n" |
| " d modify by doubleword (8 byte)\n" |
| " r toggle reverse byte order mode\n" |
| " n do not read memory (for i/o spaces)\n" |
| " . ok to read (default)\n" |
| "NOTE: flags are saved as defaults\n" |
| ""; |
| |
| static char *memex_subcmd_help_string = |
| "Memory examine subcommands:\n" |
| " hexval write this val to current location\n" |
| " 'string' write chars from string to this location\n" |
| " ' increment address\n" |
| " ^ decrement address\n" |
| " / increment addr by 0x10. //=0x100, ///=0x1000, etc\n" |
| " \\ decrement addr by 0x10. \\\\=0x100, \\\\\\=0x1000, etc\n" |
| " ` clear no-read flag\n" |
| " ; stay at this addr\n" |
| " v change to byte mode\n" |
| " w change to word (2 byte) mode\n" |
| " l change to long (4 byte) mode\n" |
| " u change to doubleword (8 byte) mode\n" |
| " m addr change current addr\n" |
| " n toggle no-read flag\n" |
| " r toggle byte reverse flag\n" |
| " < count back up count bytes\n" |
| " > count skip forward count bytes\n" |
| " x exit this mode\n" |
| ""; |
| |
| static void |
| memex(void) |
| { |
| int cmd, inc, i, nslash; |
| unsigned long n; |
| unsigned char val[16]; |
| |
| scanhex((void *)&adrs); |
| cmd = skipbl(); |
| if (cmd == '?') { |
| printf(memex_help_string); |
| return; |
| } else { |
| termch = cmd; |
| } |
| last_cmd = "m\n"; |
| while ((cmd = skipbl()) != '\n') { |
| switch( cmd ){ |
| case 'b': size = 1; break; |
| case 'w': size = 2; break; |
| case 'l': size = 4; break; |
| case 'd': size = 8; break; |
| case 'r': brev = !brev; break; |
| case 'n': mnoread = 1; break; |
| case '.': mnoread = 0; break; |
| } |
| } |
| if( size <= 0 ) |
| size = 1; |
| else if( size > 8 ) |
| size = 8; |
| for(;;){ |
| if (!mnoread) |
| n = mread(adrs, val, size); |
| printf(REG"%c", adrs, brev? 'r': ' '); |
| if (!mnoread) { |
| if (brev) |
| byterev(val, size); |
| putchar(' '); |
| for (i = 0; i < n; ++i) |
| printf("%.2x", val[i]); |
| for (; i < size; ++i) |
| printf("%s", fault_chars[fault_type]); |
| } |
| putchar(' '); |
| inc = size; |
| nslash = 0; |
| for(;;){ |
| if( scanhex(&n) ){ |
| for (i = 0; i < size; ++i) |
| val[i] = n >> (i * 8); |
| if (!brev) |
| byterev(val, size); |
| mwrite(adrs, val, size); |
| inc = size; |
| } |
| cmd = skipbl(); |
| if (cmd == '\n') |
| break; |
| inc = 0; |
| switch (cmd) { |
| case '\'': |
| for(;;){ |
| n = inchar(); |
| if( n == '\\' ) |
| n = bsesc(); |
| else if( n == '\'' ) |
| break; |
| for (i = 0; i < size; ++i) |
| val[i] = n >> (i * 8); |
| if (!brev) |
| byterev(val, size); |
| mwrite(adrs, val, size); |
| adrs += size; |
| } |
| adrs -= size; |
| inc = size; |
| break; |
| case ',': |
| adrs += size; |
| break; |
| case '.': |
| mnoread = 0; |
| break; |
| case ';': |
| break; |
| case 'x': |
| case EOF: |
| scannl(); |
| return; |
| case 'b': |
| case 'v': |
| size = 1; |
| break; |
| case 'w': |
| size = 2; |
| break; |
| case 'l': |
| size = 4; |
| break; |
| case 'u': |
| size = 8; |
| break; |
| case '^': |
| adrs -= size; |
| break; |
| break; |
| case '/': |
| if (nslash > 0) |
| adrs -= 1 << nslash; |
| else |
| nslash = 0; |
| nslash += 4; |
| adrs += 1 << nslash; |
| break; |
| case '\\': |
| if (nslash < 0) |
| adrs += 1 << -nslash; |
| else |
| nslash = 0; |
| nslash -= 4; |
| adrs -= 1 << -nslash; |
| break; |
| case 'm': |
| scanhex((void *)&adrs); |
| break; |
| case 'n': |
| mnoread = 1; |
| break; |
| case 'r': |
| brev = !brev; |
| break; |
| case '<': |
| n = size; |
| scanhex(&n); |
| adrs -= n; |
| break; |
| case '>': |
| n = size; |
| scanhex(&n); |
| adrs += n; |
| break; |
| case '?': |
| printf(memex_subcmd_help_string); |
| break; |
| } |
| } |
| adrs += inc; |
| } |
| } |
| |
| static int |
| bsesc(void) |
| { |
| int c; |
| |
| c = inchar(); |
| switch( c ){ |
| case 'n': c = '\n'; break; |
| case 'r': c = '\r'; break; |
| case 'b': c = '\b'; break; |
| case 't': c = '\t'; break; |
| } |
| return c; |
| } |
| |
| static void xmon_rawdump (unsigned long adrs, long ndump) |
| { |
| long n, m, r, nr; |
| unsigned char temp[16]; |
| |
| for (n = ndump; n > 0;) { |
| r = n < 16? n: 16; |
| nr = mread(adrs, temp, r); |
| adrs += nr; |
| for (m = 0; m < r; ++m) { |
| if (m < nr) |
| printf("%.2x", temp[m]); |
| else |
| printf("%s", fault_chars[fault_type]); |
| } |
| n -= r; |
| if (nr < r) |
| break; |
| } |
| printf("\n"); |
| } |
| |
| #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ |
| || ('a' <= (c) && (c) <= 'f') \ |
| || ('A' <= (c) && (c) <= 'F')) |
| static void |
| dump(void) |
| { |
| int c; |
| |
| c = inchar(); |
| if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n') |
| termch = c; |
| scanhex((void *)&adrs); |
| if (termch != '\n') |
| termch = 0; |
| if (c == 'i') { |
| scanhex(&nidump); |
| if (nidump == 0) |
| nidump = 16; |
| else if (nidump > MAX_DUMP) |
| nidump = MAX_DUMP; |
| adrs += ppc_inst_dump(adrs, nidump, 1); |
| last_cmd = "di\n"; |
| } else if (c == 'l') { |
| dump_log_buf(); |
| } else if (c == 'r') { |
| scanhex(&ndump); |
| if (ndump == 0) |
| ndump = 64; |
| xmon_rawdump(adrs, ndump); |
| adrs += ndump; |
| last_cmd = "dr\n"; |
| } else { |
| scanhex(&ndump); |
| if (ndump == 0) |
| ndump = 64; |
| else if (ndump > MAX_DUMP) |
| ndump = MAX_DUMP; |
| prdump(adrs, ndump); |
| adrs += ndump; |
| last_cmd = "d\n"; |
| } |
| } |
| |
| static void |
| prdump(unsigned long adrs, long ndump) |
| { |
| long n, m, c, r, nr; |
| unsigned char temp[16]; |
| |
| for (n = ndump; n > 0;) { |
| printf(REG, adrs); |
| putchar(' '); |
| r = n < 16? n: 16; |
| nr = mread(adrs, temp, r); |
| adrs += nr; |
| for (m = 0; m < r; ++m) { |
| if ((m & (sizeof(long) - 1)) == 0 && m > 0) |
| putchar(' '); |
| if (m < nr) |
| printf("%.2x", temp[m]); |
| else |
| printf("%s", fault_chars[fault_type]); |
| } |
| for (; m < 16; ++m) { |
| if ((m & (sizeof(long) - 1)) == 0) |
| putchar(' '); |
| printf(" "); |
| } |
| printf(" |"); |
| for (m = 0; m < r; ++m) { |
| if (m < nr) { |
| c = temp[m]; |
| putchar(' ' <= c && c <= '~'? c: '.'); |
| } else |
| putchar(' '); |
| } |
| n -= r; |
| for (; m < 16; ++m) |
| putchar(' '); |
| printf("|\n"); |
| if (nr < r) |
| break; |
| } |
| } |
| |
| typedef int (*instruction_dump_func)(unsigned long inst, unsigned long addr); |
| |
| static int |
| generic_inst_dump(unsigned long adr, long count, int praddr, |
| instruction_dump_func dump_func) |
| { |
| int nr, dotted; |
| unsigned long first_adr; |
| unsigned long inst, last_inst = 0; |
| unsigned char val[4]; |
| |
| dotted = 0; |
| for (first_adr = adr; count > 0; --count, adr += 4) { |
| nr = mread(adr, val, 4); |
| if (nr == 0) { |
| if (praddr) { |
| const char *x = fault_chars[fault_type]; |
| printf(REG" %s%s%s%s\n", adr, x, x, x, x); |
| } |
| break; |
| } |
| inst = GETWORD(val); |
| if (adr > first_adr && inst == last_inst) { |
| if (!dotted) { |
| printf(" ...\n"); |
| dotted = 1; |
| } |
| continue; |
| } |
| dotted = 0; |
| last_inst = inst; |
| if (praddr) |
| printf(REG" %.8x", adr, inst); |
| printf("\t"); |
| dump_func(inst, adr); |
| printf("\n"); |
| } |
| return adr - first_adr; |
| } |
| |
| static int |
| ppc_inst_dump(unsigned long adr, long count, int praddr) |
| { |
| return generic_inst_dump(adr, count, praddr, print_insn_powerpc); |
| } |
| |
| void |
| print_address(unsigned long addr) |
| { |
| xmon_print_symbol(addr, "\t# ", ""); |
| } |
| |
| void |
| dump_log_buf(void) |
| { |
| const unsigned long size = 128; |
| unsigned long end, addr; |
| unsigned char buf[size + 1]; |
| |
| addr = 0; |
| buf[size] = '\0'; |
| |
| if (setjmp(bus_error_jmp) != 0) { |
| printf("Unable to lookup symbol __log_buf!\n"); |
| return; |
| } |
| |
| catch_memory_errors = 1; |
| sync(); |
| addr = kallsyms_lookup_name("__log_buf"); |
| |
| if (! addr) |
| printf("Symbol __log_buf not found!\n"); |
| else { |
| end = addr + (1 << CONFIG_LOG_BUF_SHIFT); |
| while (addr < end) { |
| if (! mread(addr, buf, size)) { |
| printf("Can't read memory at address 0x%lx\n", addr); |
| break; |
| } |
| |
| printf("%s", buf); |
| |
| if (strlen(buf) < size) |
| break; |
| |
| addr += size; |
| } |
| } |
| |
| sync(); |
| /* wait a little while to see if we get a machine check */ |
| __delay(200); |
| catch_memory_errors = 0; |
| } |
| |
| /* |
| * Memory operations - move, set, print differences |
| */ |
| static unsigned long mdest; /* destination address */ |
| static unsigned long msrc; /* source address */ |
| static unsigned long mval; /* byte value to set memory to */ |
| static unsigned long mcount; /* # bytes to affect */ |
| static unsigned long mdiffs; /* max # differences to print */ |
| |
| static void |
| memops(int cmd) |
| { |
| scanhex((void *)&mdest); |
| if( termch != '\n' ) |
| termch = 0; |
| scanhex((void *)(cmd == 's'? &mval: &msrc)); |
| if( termch != '\n' ) |
| termch = 0; |
| scanhex((void *)&mcount); |
| switch( cmd ){ |
| case 'm': |
| memmove((void *)mdest, (void *)msrc, mcount); |
| break; |
| case 's': |
| memset((void *)mdest, mval, mcount); |
| break; |
| case 'd': |
| if( termch != '\n' ) |
| termch = 0; |
| scanhex((void *)&mdiffs); |
| memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); |
| break; |
| } |
| } |
| |
| static void |
| memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) |
| { |
| unsigned n, prt; |
| |
| prt = 0; |
| for( n = nb; n > 0; --n ) |
| if( *p1++ != *p2++ ) |
| if( ++prt <= maxpr ) |
| printf("%.16x %.2x # %.16x %.2x\n", p1 - 1, |
| p1[-1], p2 - 1, p2[-1]); |
| if( prt > maxpr ) |
| printf("Total of %d differences\n", prt); |
| } |
| |
| static unsigned mend; |
| static unsigned mask; |
| |
| static void |
| memlocate(void) |
| { |
| unsigned a, n; |
| unsigned char val[4]; |
| |
| last_cmd = "ml"; |
| scanhex((void *)&mdest); |
| if (termch != '\n') { |
| termch = 0; |
| scanhex((void *)&mend); |
| if (termch != '\n') { |
| termch = 0; |
| scanhex((void *)&mval); |
| mask = ~0; |
| if (termch != '\n') termch = 0; |
| scanhex((void *)&mask); |
| } |
| } |
| n = 0; |
| for (a = mdest; a < mend; a += 4) { |
| if (mread(a, val, 4) == 4 |
| && ((GETWORD(val) ^ mval) & mask) == 0) { |
| printf("%.16x: %.16x\n", a, GETWORD(val)); |
| if (++n >= 10) |
| break; |
| } |
| } |
| } |
| |
| static unsigned long mskip = 0x1000; |
| static unsigned long mlim = 0xffffffff; |
| |
| static void |
| memzcan(void) |
| { |
| unsigned char v; |
| unsigned a; |
| int ok, ook; |
| |
| scanhex(&mdest); |
| if (termch != '\n') termch = 0; |
| scanhex(&mskip); |
| if (termch != '\n') termch = 0; |
| scanhex(&mlim); |
| ook = 0; |
| for (a = mdest; a < mlim; a += mskip) { |
| ok = mread(a, &v, 1); |
| if (ok && !ook) { |
| printf("%.8x .. ", a); |
| } else if (!ok && ook) |
| printf("%.8x\n", a - mskip); |
| ook = ok; |
| if (a + mskip < a) |
| break; |
| } |
| if (ook) |
| printf("%.8x\n", a - mskip); |
| } |
| |
| static void proccall(void) |
| { |
| unsigned long args[8]; |
| unsigned long ret; |
| int i; |
| typedef unsigned long (*callfunc_t)(unsigned long, unsigned long, |
| unsigned long, unsigned long, unsigned long, |
| unsigned long, unsigned long, unsigned long); |
| callfunc_t func; |
| |
| if (!scanhex(&adrs)) |
| return; |
| if (termch != '\n') |
| termch = 0; |
| for (i = 0; i < 8; ++i) |
| args[i] = 0; |
| for (i = 0; i < 8; ++i) { |
| if (!scanhex(&args[i]) || termch == '\n') |
| break; |
| termch = 0; |
| } |
| func = (callfunc_t) adrs; |
| ret = 0; |
| if (setjmp(bus_error_jmp) == 0) { |
| catch_memory_errors = 1; |
| sync(); |
| ret = func(args[0], args[1], args[2], args[3], |
| args[4], args[5], args[6], args[7]); |
| sync(); |
| printf("return value is %x\n", ret); |
| } else { |
| printf("*** %x exception occurred\n", fault_except); |
| } |
| catch_memory_errors = 0; |
| } |
| |
| /* Input scanning routines */ |
| int |
| skipbl(void) |
| { |
| int c; |
| |
| if( termch != 0 ){ |
| c = termch; |
| termch = 0; |
| } else |
| c = inchar(); |
| while( c == ' ' || c == '\t' ) |
| c = inchar(); |
| return c; |
| } |
| |
| #define N_PTREGS 44 |
| static char *regnames[N_PTREGS] = { |
| "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", |
| "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", |
| "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", |
| #ifdef CONFIG_PPC64 |
| "softe", |
| #else |
| "mq", |
| #endif |
| "trap", "dar", "dsisr", "res" |
| }; |
| |
| int |
| scanhex(unsigned long *vp) |
| { |
| int c, d; |
| unsigned long v; |
| |
| c = skipbl(); |
| if (c == '%') { |
| /* parse register name */ |
| char regname[8]; |
| int i; |
| |
| for (i = 0; i < sizeof(regname) - 1; ++i) { |
| c = inchar(); |
| if (!isalnum(c)) { |
| termch = c; |
| break; |
| } |
| regname[i] = c; |
| } |
| regname[i] = 0; |
| for (i = 0; i < N_PTREGS; ++i) { |
| if (strcmp(regnames[i], regname) == 0) { |
| if (xmon_regs == NULL) { |
| printf("regs not available\n"); |
| return 0; |
| } |
| *vp = ((unsigned long *)xmon_regs)[i]; |
| return 1; |
| } |
| } |
| printf("invalid register name '%%%s'\n", regname); |
| return 0; |
| } |
| |
| /* skip leading "0x" if any */ |
| |
| if (c == '0') { |
| c = inchar(); |
| if (c == 'x') { |
| c = inchar(); |
| } else { |
| d = hexdigit(c); |
| if (d == EOF) { |
| termch = c; |
| *vp = 0; |
| return 1; |
| } |
| } |
| } else if (c == '$') { |
| int i; |
| for (i=0; i<63; i++) { |
| c = inchar(); |
| if (isspace(c)) { |
| termch = c; |
| break; |
| } |
| tmpstr[i] = c; |
| } |
| tmpstr[i++] = 0; |
| *vp = 0; |
| if (setjmp(bus_error_jmp) == 0) { |
| catch_memory_errors = 1; |
| sync(); |
| *vp = kallsyms_lookup_name(tmpstr); |
| sync(); |
| } |
| catch_memory_errors = 0; |
| if (!(*vp)) { |
| printf("unknown symbol '%s'\n", tmpstr); |
| return 0; |
| } |
| return 1; |
| } |
| |
| d = hexdigit(c); |
| if (d == EOF) { |
| termch = c; |
| return 0; |
| } |
| v = 0; |
| do { |
| v = (v << 4) + d; |
| c = inchar(); |
| d = hexdigit(c); |
| } while (d != EOF); |
| termch = c; |
| *vp = v; |
| return 1; |
| } |
| |
| static void |
| scannl(void) |
| { |
| int c; |
| |
| c = termch; |
| termch = 0; |
| while( c != '\n' ) |
| c = inchar(); |
| } |
| |
| static 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; |
| |
| static void |
| flush_input(void) |
| { |
| lineptr = NULL; |
| } |
| |
| static int |
| inchar(void) |
| { |
| if (lineptr == NULL || *lineptr == 0) { |
| if (xmon_gets(line, sizeof(line)) == NULL) { |
| lineptr = NULL; |
| return EOF; |
| } |
| lineptr = line; |
| } |
| return *lineptr++; |
| } |
| |
| static void |
| take_input(char *str) |
| { |
| lineptr = str; |
| } |
| |
| |
| static void |
| symbol_lookup(void) |
| { |
| int type = inchar(); |
| unsigned long addr; |
| static char tmp[64]; |
| |
| switch (type) { |
| case 'a': |
| if (scanhex(&addr)) |
| xmon_print_symbol(addr, ": ", "\n"); |
| termch = 0; |
| break; |
| case 's': |
| getstring(tmp, 64); |
| if (setjmp(bus_error_jmp) == 0) { |
| catch_memory_errors = 1; |
| sync(); |
| addr = kallsyms_lookup_name(tmp); |
| if (addr) |
| printf("%s: %lx\n", tmp, addr); |
| else |
| printf("Symbol '%s' not found.\n", tmp); |
| sync(); |
| } |
| catch_memory_errors = 0; |
| termch = 0; |
| break; |
| } |
| } |
| |
| |
| /* Print an address in numeric and symbolic form (if possible) */ |
| static void xmon_print_symbol(unsigned long address, const char *mid, |
| const char *after) |
| { |
| char *modname; |
| const char *name = NULL; |
| unsigned long offset, size; |
| |
| printf(REG, address); |
| if (setjmp(bus_error_jmp) == 0) { |
| catch_memory_errors = 1; |
| sync(); |
| name = kallsyms_lookup(address, &size, &offset, &modname, |
| tmpstr); |
| sync(); |
| /* wait a little while to see if we get a machine check */ |
| __delay(200); |
| } |
| |
| catch_memory_errors = 0; |
| |
| if (name) { |
| printf("%s%s+%#lx/%#lx", mid, name, offset, size); |
| if (modname) |
| printf(" [%s]", modname); |
| } |
| printf("%s", after); |
| } |
| |
| #ifdef CONFIG_PPC_BOOK3S_64 |
| static void dump_slb(void) |
| { |
| int i; |
| unsigned long esid,vsid,valid; |
| unsigned long llp; |
| |
| printf("SLB contents of cpu %x\n", smp_processor_id()); |
| |
| for (i = 0; i < mmu_slb_size; i++) { |
| asm volatile("slbmfee %0,%1" : "=r" (esid) : "r" (i)); |
| asm volatile("slbmfev %0,%1" : "=r" (vsid) : "r" (i)); |
| valid = (esid & SLB_ESID_V); |
| if (valid | esid | vsid) { |
| printf("%02d %016lx %016lx", i, esid, vsid); |
| if (valid) { |
| llp = vsid & SLB_VSID_LLP; |
| if (vsid & SLB_VSID_B_1T) { |
| printf(" 1T ESID=%9lx VSID=%13lx LLP:%3lx \n", |
| GET_ESID_1T(esid), |
| (vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT_1T, |
| llp); |
| } else { |
| printf(" 256M ESID=%9lx VSID=%13lx LLP:%3lx \n", |
| GET_ESID(esid), |
| (vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT, |
| llp); |
| } |
| } else |
| printf("\n"); |
| } |
| } |
| } |
| |
| static void dump_stab(void) |
| { |
| int i; |
| unsigned long *tmp = (unsigned long *)get_paca()->stab_addr; |
| |
| printf("Segment table contents of cpu %x\n", smp_processor_id()); |
| |
| for (i = 0; i < PAGE_SIZE/16; i++) { |
| unsigned long a, b; |
| |
| a = *tmp++; |
| b = *tmp++; |
| |
| if (a || b) { |
| printf("%03d %016lx ", i, a); |
| printf("%016lx\n", b); |
| } |
| } |
| } |
| |
| void dump_segments(void) |
| { |
| if (mmu_has_feature(MMU_FTR_SLB)) |
| dump_slb(); |
| else |
| dump_stab(); |
| } |
| #endif |
| |
| #ifdef CONFIG_PPC_STD_MMU_32 |
| void dump_segments(void) |
| { |
| int i; |
| |
| printf("sr0-15 ="); |
| for (i = 0; i < 16; ++i) |
| printf(" %x", mfsrin(i)); |
| printf("\n"); |
| } |
| #endif |
| |
| #ifdef CONFIG_44x |
| static void dump_tlb_44x(void) |
| { |
| int i; |
| |
| for (i = 0; i < PPC44x_TLB_SIZE; i++) { |
| unsigned long w0,w1,w2; |
| asm volatile("tlbre %0,%1,0" : "=r" (w0) : "r" (i)); |
| asm volatile("tlbre %0,%1,1" : "=r" (w1) : "r" (i)); |
| asm volatile("tlbre %0,%1,2" : "=r" (w2) : "r" (i)); |
| printf("[%02x] %08x %08x %08x ", i, w0, w1, w2); |
| if (w0 & PPC44x_TLB_VALID) { |
| printf("V %08x -> %01x%08x %c%c%c%c%c", |
| w0 & PPC44x_TLB_EPN_MASK, |
| w1 & PPC44x_TLB_ERPN_MASK, |
| w1 & PPC44x_TLB_RPN_MASK, |
| (w2 & PPC44x_TLB_W) ? 'W' : 'w', |
| (w2 & PPC44x_TLB_I) ? 'I' : 'i', |
| (w2 & PPC44x_TLB_M) ? 'M' : 'm', |
| (w2 & PPC44x_TLB_G) ? 'G' : 'g', |
| (w2 & PPC44x_TLB_E) ? 'E' : 'e'); |
| } |
| printf("\n"); |
| } |
| } |
| #endif /* CONFIG_44x */ |
| |
| #ifdef CONFIG_PPC_BOOK3E |
| static void dump_tlb_book3e(void) |
| { |
| u32 mmucfg, pidmask, lpidmask; |
| u64 ramask; |
| int i, tlb, ntlbs, pidsz, lpidsz, rasz, lrat = 0; |
| int mmu_version; |
| static const char *pgsz_names[] = { |
| " 1K", |
| " 2K", |
| " 4K", |
| " 8K", |
| " 16K", |
| " 32K", |
| " 64K", |
| "128K", |
| "256K", |
| "512K", |
| " 1M", |
| " 2M", |
| " 4M", |
| " 8M", |
| " 16M", |
| " 32M", |
| " 64M", |
| "128M", |
| "256M", |
| "512M", |
| " 1G", |
| " 2G", |
| " 4G", |
| " 8G", |
| " 16G", |
| " 32G", |
| " 64G", |
| "128G", |
| "256G", |
| "512G", |
| " 1T", |
| " 2T", |
| }; |
| |
| /* Gather some infos about the MMU */ |
| mmucfg = mfspr(SPRN_MMUCFG); |
| mmu_version = (mmucfg & 3) + 1; |
| ntlbs = ((mmucfg >> 2) & 3) + 1; |
| pidsz = ((mmucfg >> 6) & 0x1f) + 1; |
| lpidsz = (mmucfg >> 24) & 0xf; |
| rasz = (mmucfg >> 16) & 0x7f; |
| if ((mmu_version > 1) && (mmucfg & 0x10000)) |
| lrat = 1; |
| printf("Book3E MMU MAV=%d.0,%d TLBs,%d-bit PID,%d-bit LPID,%d-bit RA\n", |
| mmu_version, ntlbs, pidsz, lpidsz, rasz); |
| pidmask = (1ul << pidsz) - 1; |
| lpidmask = (1ul << lpidsz) - 1; |
| ramask = (1ull << rasz) - 1; |
| |
| for (tlb = 0; tlb < ntlbs; tlb++) { |
| u32 tlbcfg; |
| int nent, assoc, new_cc = 1; |
| printf("TLB %d:\n------\n", tlb); |
| switch(tlb) { |
| case 0: |
| tlbcfg = mfspr(SPRN_TLB0CFG); |
| break; |
| case 1: |
| tlbcfg = mfspr(SPRN_TLB1CFG); |
| break; |
| case 2: |
| tlbcfg = mfspr(SPRN_TLB2CFG); |
| break; |
| case 3: |
| tlbcfg = mfspr(SPRN_TLB3CFG); |
| break; |
| default: |
| printf("Unsupported TLB number !\n"); |
| continue; |
| } |
| nent = tlbcfg & 0xfff; |
| assoc = (tlbcfg >> 24) & 0xff; |
| for (i = 0; i < nent; i++) { |
| u32 mas0 = MAS0_TLBSEL(tlb); |
| u32 mas1 = MAS1_TSIZE(BOOK3E_PAGESZ_4K); |
| u64 mas2 = 0; |
| u64 mas7_mas3; |
| int esel = i, cc = i; |
| |
| if (assoc != 0) { |
| cc = i / assoc; |
| esel = i % assoc; |
| mas2 = cc * 0x1000; |
| } |
| |
| mas0 |= MAS0_ESEL(esel); |
| mtspr(SPRN_MAS0, mas0); |
| mtspr(SPRN_MAS1, mas1); |
| mtspr(SPRN_MAS2, mas2); |
| asm volatile("tlbre 0,0,0" : : : "memory"); |
| mas1 = mfspr(SPRN_MAS1); |
| mas2 = mfspr(SPRN_MAS2); |
| mas7_mas3 = mfspr(SPRN_MAS7_MAS3); |
| if (assoc && (i % assoc) == 0) |
| new_cc = 1; |
| if (!(mas1 & MAS1_VALID)) |
| continue; |
| if (assoc == 0) |
| printf("%04x- ", i); |
| else if (new_cc) |
| printf("%04x-%c", cc, 'A' + esel); |
| else |
| printf(" |%c", 'A' + esel); |
| new_cc = 0; |
| printf(" %016llx %04x %s %c%c AS%c", |
| mas2 & ~0x3ffull, |
| (mas1 >> 16) & 0x3fff, |
| pgsz_names[(mas1 >> 7) & 0x1f], |
| mas1 & MAS1_IND ? 'I' : ' ', |
| mas1 & MAS1_IPROT ? 'P' : ' ', |
| mas1 & MAS1_TS ? '1' : '0'); |
| printf(" %c%c%c%c%c%c%c", |
| mas2 & MAS2_X0 ? 'a' : ' ', |
| mas2 & MAS2_X1 ? 'v' : ' ', |
| mas2 & MAS2_W ? 'w' : ' ', |
| mas2 & MAS2_I ? 'i' : ' ', |
| mas2 & MAS2_M ? 'm' : ' ', |
| mas2 & MAS2_G ? 'g' : ' ', |
| mas2 & MAS2_E ? 'e' : ' '); |
| printf(" %016llx", mas7_mas3 & ramask & ~0x7ffull); |
| if (mas1 & MAS1_IND) |
| printf(" %s\n", |
| pgsz_names[(mas7_mas3 >> 1) & 0x1f]); |
| else |
| printf(" U%c%c%c S%c%c%c\n", |
| mas7_mas3 & MAS3_UX ? 'x' : ' ', |
| mas7_mas3 & MAS3_UW ? 'w' : ' ', |
| mas7_mas3 & MAS3_UR ? 'r' : ' ', |
| mas7_mas3 & MAS3_SX ? 'x' : ' ', |
| mas7_mas3 & MAS3_SW ? 'w' : ' ', |
| mas7_mas3 & MAS3_SR ? 'r' : ' '); |
| } |
| } |
| } |
| #endif /* CONFIG_PPC_BOOK3E */ |
| |
| static void xmon_init(int enable) |
| { |
| #ifdef CONFIG_PPC_ISERIES |
| if (firmware_has_feature(FW_FEATURE_ISERIES)) |
| return; |
| #endif |
| if (enable) { |
| __debugger = xmon; |
| __debugger_ipi = xmon_ipi; |
| __debugger_bpt = xmon_bpt; |
| __debugger_sstep = xmon_sstep; |
| __debugger_iabr_match = xmon_iabr_match; |
| __debugger_dabr_match = xmon_dabr_match; |
| __debugger_fault_handler = xmon_fault_handler; |
| } else { |
| __debugger = NULL; |
| __debugger_ipi = NULL; |
| __debugger_bpt = NULL; |
| __debugger_sstep = NULL; |
| __debugger_iabr_match = NULL; |
| __debugger_dabr_match = NULL; |
| __debugger_fault_handler = NULL; |
| } |
| xmon_map_scc(); |
| } |
| |
| #ifdef CONFIG_MAGIC_SYSRQ |
| static void sysrq_handle_xmon(int key) |
| { |
| /* ensure xmon is enabled */ |
| xmon_init(1); |
| debugger(get_irq_regs()); |
| } |
| |
| static struct sysrq_key_op sysrq_xmon_op = { |
| .handler = sysrq_handle_xmon, |
| .help_msg = "Xmon", |
| .action_msg = "Entering xmon", |
| }; |
| |
| static int __init setup_xmon_sysrq(void) |
| { |
| #ifdef CONFIG_PPC_ISERIES |
| if (firmware_has_feature(FW_FEATURE_ISERIES)) |
| return 0; |
| #endif |
| register_sysrq_key('x', &sysrq_xmon_op); |
| return 0; |
| } |
| __initcall(setup_xmon_sysrq); |
| #endif /* CONFIG_MAGIC_SYSRQ */ |
| |
| static int __initdata xmon_early, xmon_off; |
| |
| static int __init early_parse_xmon(char *p) |
| { |
| if (!p || strncmp(p, "early", 5) == 0) { |
| /* just "xmon" is equivalent to "xmon=early" */ |
| xmon_init(1); |
| xmon_early = 1; |
| } else if (strncmp(p, "on", 2) == 0) |
| xmon_init(1); |
| else if (strncmp(p, "off", 3) == 0) |
| xmon_off = 1; |
| else if (strncmp(p, "nobt", 4) == 0) |
| xmon_no_auto_backtrace = 1; |
| else |
| return 1; |
| |
| return 0; |
| } |
| early_param("xmon", early_parse_xmon); |
| |
| void __init xmon_setup(void) |
| { |
| |