| /* |
| * Routines providing a simple monitor for use on the PowerMac. |
| * |
| * Copyright (C) 1996 Paul Mackerras. |
| */ |
| #include <linux/config.h> |
| #include <linux/errno.h> |
| #include <linux/sched.h> |
| #include <linux/smp.h> |
| #include <linux/interrupt.h> |
| #include <linux/bitops.h> |
| #include <linux/kallsyms.h> |
| #include <asm/ptrace.h> |
| #include <asm/string.h> |
| #include <asm/prom.h> |
| #include <asm/bootx.h> |
| #include <asm/machdep.h> |
| #include <asm/xmon.h> |
| #include "nonstdio.h" |
| #include "privinst.h" |
| |
| #define scanhex xmon_scanhex |
| #define skipbl xmon_skipbl |
| |
| #ifdef CONFIG_SMP |
| static unsigned long cpus_in_xmon = 0; |
| static unsigned long got_xmon = 0; |
| static volatile int take_xmon = -1; |
| #endif /* CONFIG_SMP */ |
| |
| static unsigned adrs; |
| static int size = 1; |
| static unsigned ndump = 64; |
| static unsigned nidump = 16; |
| static unsigned ncsum = 4096; |
| static int termch; |
| |
| static u_int bus_error_jmp[100]; |
| #define setjmp xmon_setjmp |
| #define longjmp xmon_longjmp |
| |
| /* Breakpoint stuff */ |
| struct bpt { |
| unsigned address; |
| unsigned instr; |
| unsigned count; |
| unsigned char enabled; |
| }; |
| |
| #define NBPTS 16 |
| static struct bpt bpts[NBPTS]; |
| static struct bpt dabr; |
| static struct bpt iabr; |
| static unsigned bpinstr = 0x7fe00008; /* trap */ |
| |
| /* Prototypes */ |
| extern void (*debugger_fault_handler)(struct pt_regs *); |
| static int cmds(struct pt_regs *); |
| static int mread(unsigned, void *, int); |
| static int mwrite(unsigned, void *, int); |
| static void 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, int); |
| #ifdef __MWERKS__ |
| static void prndump(unsigned, int); |
| static int nvreadb(unsigned); |
| #endif |
| static int ppc_inst_dump(unsigned, int); |
| void print_address(unsigned); |
| static int getsp(void); |
| static void dump_hash_table(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 *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 void openforth(void); */ |
| static unsigned read_spr(int); |
| static void write_spr(int, unsigned); |
| static void super_regs(void); |
| static void symbol_lookup(void); |
| static void remove_bpts(void); |
| static void insert_bpts(void); |
| static struct bpt *at_breakpoint(unsigned pc); |
| static void bpt_cmds(void); |
| void cacheflush(void); |
| #ifdef CONFIG_SMP |
| static void cpu_cmd(void); |
| #endif /* CONFIG_SMP */ |
| static void csum(void); |
| #ifdef CONFIG_BOOTX_TEXT |
| static void vidcmds(void); |
| #endif |
| static void bootcmds(void); |
| static void proccall(void); |
| static void printtime(void); |
| |
| extern int print_insn_big_powerpc(FILE *, unsigned long, unsigned); |
| extern void printf(const char *fmt, ...); |
| extern int putchar(int ch); |
| extern int setjmp(u_int *); |
| extern void longjmp(u_int *, int); |
| |
| extern void xmon_enter(void); |
| extern void xmon_leave(void); |
| |
| static unsigned start_tb[NR_CPUS][2]; |
| static unsigned stop_tb[NR_CPUS][2]; |
| |
| #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\ |
| d dump bytes\n\ |
| di dump instructions\n\ |
| df dump float values\n\ |
| dd dump double values\n\ |
| e print exception information\n\ |
| h dump hash table\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\ |
| r print registers\n\ |
| S print special registers\n\ |
| t print backtrace\n\ |
| la lookup address\n\ |
| ls lookup symbol\n\ |
| C checksum\n\ |
| p call function with arguments\n\ |
| T print time\n\ |
| x exit monitor\n\ |
| zr reboot\n\ |
| zh halt\n\ |
| "; |
| |
| static int xmon_trace[NR_CPUS]; |
| #define SSTEP 1 /* stepping because of 's' command */ |
| #define BRSTEP 2 /* stepping over breakpoint */ |
| |
| static struct pt_regs *xmon_regs[NR_CPUS]; |
| |
| extern inline void sync(void) |
| { |
| asm volatile("sync; isync"); |
| } |
| |
| extern inline void __delay(unsigned int loops) |
| { |
| if (loops != 0) |
| __asm__ __volatile__("mtctr %0; 1: bdnz 1b" : : |
| "r" (loops) : "ctr"); |
| } |
| |
| /* 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; |
| static char tmpstr[128]; |
| |
| printf("%.8lx", address); |
| if (setjmp(bus_error_jmp) == 0) { |
| debugger_fault_handler = handle_fault; |
| sync(); |
| name = kallsyms_lookup(address, &size, &offset, &modname, |
| tmpstr); |
| sync(); |
| /* wait a little while to see if we get a machine check */ |
| __delay(200); |
| } |
| debugger_fault_handler = NULL; |
| |
| if (name) { |
| printf("%s%s+%#lx/%#lx", mid, name, offset, size); |
| if (modname) |
| printf(" [%s]", modname); |
| } |
| printf("%s", after); |
| } |
| |
| static void get_tb(unsigned *p) |
| { |
| unsigned hi, lo, hiagain; |
| |
| if ((get_pvr() >> 16) == 1) |
| return; |
| |
| do { |
| asm volatile("mftbu %0; mftb %1; mftbu %2" |
| : "=r" (hi), "=r" (lo), "=r" (hiagain)); |
| } while (hi != hiagain); |
| p[0] = hi; |
| p[1] = lo; |
| } |
| |
| int xmon(struct pt_regs *excp) |
| { |
| struct pt_regs regs; |
| int msr, cmd; |
| |
| get_tb(stop_tb[smp_processor_id()]); |
| if (excp == NULL) { |
| asm volatile ("stw 0,0(%0)\n\ |
| lwz 0,0(1)\n\ |
| stw 0,4(%0)\n\ |
| stmw 2,8(%0)" : : "b" (®s)); |
| regs.nip = regs.link = ((unsigned long *)regs.gpr[1])[1]; |
| regs.msr = get_msr(); |
| regs.ctr = get_ctr(); |
| regs.xer = get_xer(); |
| regs.ccr = get_cr(); |
| regs.trap = 0; |
| excp = ®s; |
| } |
| |
| msr = get_msr(); |
| set_msr(msr & ~0x8000); /* disable interrupts */ |
| xmon_regs[smp_processor_id()] = excp; |
| xmon_enter(); |
| excprint(excp); |
| #ifdef CONFIG_SMP |
| if (test_and_set_bit(smp_processor_id(), &cpus_in_xmon)) |
| for (;;) |
| ; |
| while (test_and_set_bit(0, &got_xmon)) { |
| if (take_xmon == smp_processor_id()) { |
| take_xmon = -1; |
| break; |
| } |
| } |
| /* |
| * XXX: breakpoints are removed while any cpu is in xmon |
| */ |
| #endif /* CONFIG_SMP */ |
| remove_bpts(); |
| cmd = cmds(excp); |
| if (cmd == 's') { |
| xmon_trace[smp_processor_id()] = SSTEP; |
| excp->msr |= 0x400; |
| } else if (at_breakpoint(excp->nip)) { |
| xmon_trace[smp_processor_id()] = BRSTEP; |
| excp->msr |= 0x400; |
| } else { |
| xmon_trace[smp_processor_id()] = 0; |
| insert_bpts(); |
| } |
| xmon_leave(); |
| xmon_regs[smp_processor_id()] = NULL; |
| #ifdef CONFIG_SMP |
| clear_bit(0, &got_xmon); |
| clear_bit(smp_processor_id(), &cpus_in_xmon); |
| #endif /* CONFIG_SMP */ |
| set_msr(msr); /* restore interrupt enable */ |
| get_tb(start_tb[smp_processor_id()]); |
| |
| return cmd != 'X'; |
| } |
| |
| irqreturn_t |
| xmon_irq(int irq, void *d, struct pt_regs *regs) |
| { |
| unsigned long flags; |
| local_irq_save(flags); |
| printf("Keyboard interrupt\n"); |
| xmon(regs); |
| local_irq_restore(flags); |
| return IRQ_HANDLED; |
| } |
| |
| int |
| xmon_bpt(struct pt_regs *regs) |
| { |
| struct bpt *bp; |
| |
| bp = at_breakpoint(regs->nip); |
| if (!bp) |
| return 0; |
| if (bp->count) { |
| --bp->count; |
| remove_bpts(); |
| excprint(regs); |
| xmon_trace[smp_processor_id()] = BRSTEP; |
| regs->msr |= 0x400; |
| } else { |
| xmon(regs); |
| } |
| return 1; |
| } |
| |
| int |
| xmon_sstep(struct pt_regs *regs) |
| { |
| if (!xmon_trace[smp_processor_id()]) |
| return 0; |
| if (xmon_trace[smp_processor_id()] == BRSTEP) { |
| xmon_trace[smp_processor_id()] = 0; |
| insert_bpts(); |
| } else { |
| xmon(regs); |
| } |
| return 1; |
| } |
| |
| int |
| xmon_dabr_match(struct pt_regs *regs) |
| { |
| if (dabr.enabled && dabr.count) { |
| --dabr.count; |
| remove_bpts(); |
| excprint(regs); |
| xmon_trace[smp_processor_id()] = BRSTEP; |
| regs->msr |= 0x400; |
| } else { |
| dabr.instr = regs->nip; |
| xmon(regs); |
| } |
| return 1; |
| } |
| |
| int |
| xmon_iabr_match(struct pt_regs *regs) |
| { |
| if (iabr.enabled && iabr.count) { |
| --iabr.count; |
| remove_bpts(); |
| excprint(regs); |
| xmon_trace[smp_processor_id()] = BRSTEP; |
| regs->msr |= 0x400; |
| } else { |
| xmon(regs); |
| } |
| return 1; |
| } |
| |
| static struct bpt * |
| at_breakpoint(unsigned pc) |
| { |
| int i; |
| struct bpt *bp; |
| |
| if (dabr.enabled && pc == dabr.instr) |
| return &dabr; |
| if (iabr.enabled && pc == iabr.address) |
| return &iabr; |
| bp = bpts; |
| for (i = 0; i < NBPTS; ++i, ++bp) |
| if (bp->enabled && pc == bp->address) |
| return bp; |
| return NULL; |
| } |
| |
| static void |
| insert_bpts(void) |
| { |
| int i; |
| struct bpt *bp; |
| |
| bp = bpts; |
| for (i = 0; i < NBPTS; ++i, ++bp) { |
| if (!bp->enabled) |
| continue; |
| if (mread(bp->address, &bp->instr, 4) != 4 |
| || mwrite(bp->address, &bpinstr, 4) != 4) { |
| printf("Couldn't insert breakpoint at %x, disabling\n", |
| bp->address); |
| bp->enabled = 0; |
| } |
| store_inst((void *) bp->address); |
| } |
| #if !defined(CONFIG_8xx) |
| if (dabr.enabled) |
| set_dabr(dabr.address); |
| if (iabr.enabled) |
| set_iabr(iabr.address); |
| #endif |
| } |
| |
| static void |
| remove_bpts(void) |
| { |
| int i; |
| struct bpt *bp; |
| unsigned instr; |
| |
| #if !defined(CONFIG_8xx) |
| set_dabr(0); |
| set_iabr(0); |
| #endif |
| bp = bpts; |
| for (i = 0; i < NBPTS; ++i, ++bp) { |
| if (!bp->enabled) |
| continue; |
| if (mread(bp->address, &instr, 4) == 4 |
| && instr == bpinstr |
| && mwrite(bp->address, &bp->instr, 4) != 4) |
| printf("Couldn't remove breakpoint at %x\n", |
| bp->address); |
| store_inst((void *) bp->address); |
| } |
| } |
| |
| static char *last_cmd; |
| |
| /* Command interpreting routine */ |
| static int |
| cmds(struct pt_regs *excp) |
| { |
| int cmd; |
| |
| last_cmd = NULL; |
| for(;;) { |
| #ifdef CONFIG_SMP |
| printf("%d:", smp_processor_id()); |
| #endif /* CONFIG_SMP */ |
| printf("mon> "); |
| fflush(stdout); |
| 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; |
| default: |
| termch = cmd; |
| memex(); |
| } |
| break; |
| case 'd': |
| dump(); |
| break; |
| case 'l': |
| symbol_lookup(); |
| break; |
| case 'r': |
| if (excp != NULL) |
| prregs(excp); /* print regs */ |
| break; |
| case 'e': |
| if (excp == NULL) |
| printf("No exception information\n"); |
| else |
| excprint(excp); |
| break; |
| case 'S': |
| super_regs(); |
| break; |
| case 't': |
| backtrace(excp); |
| break; |
| case 'f': |
| cacheflush(); |
| break; |
| case 'h': |
| dump_hash_table(); |
| break; |
| case 's': |
| case 'x': |
| case EOF: |
| return cmd; |
| case '?': |
| printf(help_string); |
| break; |
| default: |
| printf("Unrecognized command: "); |
| if( ' ' < cmd && cmd <= '~' ) |
| putchar(cmd); |
| else |
| printf("\\x%x", cmd); |
| printf(" (type ? for help)\n"); |
| break; |
| case 'b': |
| bpt_cmds(); |
| break; |
| case 'C': |
| csum(); |
| break; |
| #ifdef CONFIG_SMP |
| case 'c': |
| cpu_cmd(); |
| break; |
| #endif /* CONFIG_SMP */ |
| #ifdef CONFIG_BOOTX_TEXT |
| case 'v': |
| vidcmds(); |
| break; |
| #endif |
| case 'z': |
| bootcmds(); |
| break; |
| case 'p': |
| proccall(); |
| break; |
| case 'T': |
| printtime(); |
| break; |
| } |
| } |
| } |
| |
| extern unsigned tb_to_us; |
| |
| #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 */ |
| |
| #ifdef CONFIG_BOOTX_TEXT |
| extern boot_infos_t disp_bi; |
| |
| static void vidcmds(void) |
| { |
| int c = inchar(); |
| unsigned int val, w; |
| extern int boot_text_mapped; |
| |
| if (!boot_text_mapped) |
| return; |
| if (c != '\n' && scanhex(&val)) { |
| switch (c) { |
| case 'd': |
| w = disp_bi.dispDeviceRowBytes |
| / (disp_bi.dispDeviceDepth >> 3); |
| disp_bi.dispDeviceDepth = val; |
| disp_bi.dispDeviceRowBytes = w * (val >> 3); |
| return; |
| case 'p': |
| disp_bi.dispDeviceRowBytes = val; |
| return; |
| case 'w': |
| disp_bi.dispDeviceRect[2] = val; |
| return; |
| case 'h': |
| disp_bi.dispDeviceRect[3] = val; |
| return; |
| } |
| } |
| printf("W = %d (0x%x) H = %d (0x%x) D = %d (0x%x) P = %d (0x%x)\n", |
| disp_bi.dispDeviceRect[2], disp_bi.dispDeviceRect[2], |
| disp_bi.dispDeviceRect[3], disp_bi.dispDeviceRect[3], |
| disp_bi.dispDeviceDepth, disp_bi.dispDeviceDepth, |
| disp_bi.dispDeviceRowBytes, disp_bi.dispDeviceRowBytes); |
| } |
| #endif /* CONFIG_BOOTX_TEXT */ |
| |
| static unsigned short fcstab[256] = { |
| 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, |
| 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, |
| 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, |
| 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, |
| 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, |
| 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, |
| 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, |
| 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, |
| 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, |
| 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, |
| 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, |
| 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, |
| 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, |
| 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, |
| 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, |
| 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, |
| 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, |
| 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, |
| 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, |
| 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, |
| 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, |
| 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, |
| 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, |
| 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, |
| 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, |
| 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, |
| 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, |
| 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, |
| 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, |
| 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, |
| 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, |
| 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 |
| }; |
| |
| #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) |
| |
| static void |
| csum(void) |
| { |
| unsigned int i; |
| unsigned short fcs; |
| unsigned char v; |
| |
| if (!scanhex(&adrs)) |
| return; |
| if (!scanhex(&ncsum)) |
| return; |
| fcs = 0xffff; |
| for (i = 0; i < ncsum; ++i) { |
| if (mread(adrs+i, &v, 1) == 0) { |
| printf("csum stopped at %x\n", adrs+i); |
| break; |
| } |
| fcs = FCS(fcs, v); |
| } |
| printf("%x\n", fcs); |
| } |
| |
| static void |
| bpt_cmds(void) |
| { |
| int cmd; |
| unsigned a; |
| int mode, i; |
| struct bpt *bp; |
| |
| cmd = inchar(); |
| switch (cmd) { |
| #if !defined(CONFIG_8xx) |
| case 'd': |
| mode = 7; |
| cmd = inchar(); |
| if (cmd == 'r') |
| mode = 5; |
| else if (cmd == 'w') |
| mode = 6; |
| else |
| termch = cmd; |
| cmd = inchar(); |
| if (cmd == 'p') |
| mode &= ~4; |
| else |
| termch = cmd; |
| dabr.address = 0; |
| dabr.count = 0; |
| dabr.enabled = scanhex(&dabr.address); |
| scanhex(&dabr.count); |
| if (dabr.enabled) |
| dabr.address = (dabr.address & ~7) | mode; |
| break; |
| case 'i': |
| cmd = inchar(); |
| if (cmd == 'p') |
| mode = 2; |
| else |
| mode = 3; |
| iabr.address = 0; |
| iabr.count = 0; |
| iabr.enabled = scanhex(&iabr.address); |
| if (iabr.enabled) |
| iabr.address |= mode; |
| scanhex(&iabr.count); |
| break; |
| #endif |
| case 'c': |
| if (!scanhex(&a)) { |
| /* clear all breakpoints */ |
| for (i = 0; i < NBPTS; ++i) |
| bpts[i].enabled = 0; |
| iabr.enabled = 0; |
| dabr.enabled = 0; |
| printf("All breakpoints cleared\n"); |
| } else { |
| bp = at_breakpoint(a); |
| if (bp == 0) { |
| printf("No breakpoint at %x\n", a); |
| } else { |
| bp->enabled = 0; |
| } |
| } |
| break; |
| default: |
| termch = cmd; |
| if (!scanhex(&a)) { |
| /* print all breakpoints */ |
| printf("type address count\n"); |
| if (dabr.enabled) { |
| printf("data %.8x %8x [", dabr.address & ~7, |
| dabr.count); |
| if (dabr.address & 1) |
| printf("r"); |
| if (dabr.address & 2) |
| printf("w"); |
| if (!(dabr.address & 4)) |
| printf("p"); |
| printf("]\n"); |
| } |
| if (iabr.enabled) |
| printf("inst %.8x %8x\n", iabr.address & ~3, |
| iabr.count); |
| for (bp = bpts; bp < &bpts[NBPTS]; ++bp) |
| if (bp->enabled) |
| printf("trap %.8x %8x\n", bp->address, |
| bp->count); |
| break; |
| } |
| bp = at_breakpoint(a); |
| if (bp == 0) { |
| for (bp = bpts; bp < &bpts[NBPTS]; ++bp) |
| if (!bp->enabled) |
| break; |
| if (bp >= &bpts[NBPTS]) { |
| printf("Sorry, no free breakpoints\n"); |
| break; |
| } |
| } |
| bp->enabled = 1; |
| bp->address = a; |
| bp->count = 0; |
| scanhex(&bp->count); |
| break; |
| } |
| } |
| |
| static void |
| backtrace(struct pt_regs *excp) |
| { |
| unsigned sp; |
| unsigned stack[2]; |
| struct pt_regs regs; |
| extern char ret_from_except, ret_from_except_full, ret_from_syscall; |
| |
| printf("backtrace:\n"); |
| |
| if (excp != NULL) |
| sp = excp->gpr[1]; |
| else |
| sp = getsp(); |
| scanhex(&sp); |
| scannl(); |
| for (; sp != 0; sp = stack[0]) { |
| if (mread(sp, stack, sizeof(stack)) != sizeof(stack)) |
| break; |
| printf("[%.8lx] ", stack); |
| xmon_print_symbol(stack[1], " ", "\n"); |
| if (stack[1] == (unsigned) &ret_from_except |
| || stack[1] == (unsigned) &ret_from_except_full |
| || stack[1] == (unsigned) &ret_from_syscall) { |
| if (mread(sp+16, ®s, sizeof(regs)) != sizeof(regs)) |
| break; |
| printf("exception:%x [%x] %x\n", regs.trap, sp+16, |
| regs.nip); |
| sp = regs.gpr[1]; |
| if (mread(sp, stack, sizeof(stack)) != sizeof(stack)) |
| break; |
| } |
| } |
| } |
| |
| int |
| getsp(void) |
| { |
| int x; |
| |
| asm("mr %0,1" : "=r" (x) :); |
| return x; |
| } |
| |
| void |
| excprint(struct pt_regs *fp) |
| { |
| int trap; |
| |
| #ifdef CONFIG_SMP |
| printf("cpu %d: ", smp_processor_id()); |
| #endif /* CONFIG_SMP */ |
| printf("vector: %x at pc=", fp->trap); |
| xmon_print_symbol(fp->nip, ": ", ", lr="); |
| xmon_print_symbol(fp->link, ": ", "\n"); |
| printf("msr = %x, sp = %x [%x]\n", fp->msr, fp->gpr[1], fp); |
| trap = TRAP(fp); |
| if (trap == 0x300 || trap == 0x600) |
| printf("dar = %x, dsisr = %x\n", fp->dar, fp->dsisr); |
| if (current) |
| printf("current = %x, pid = %d, comm = %s\n", |
| current, current->pid, current->comm); |
| } |
| |
| void |
| prregs(struct pt_regs *fp) |
| { |
| int n; |
| unsigned base; |
| |
| if (scanhex(&base)) |
| fp = (struct pt_regs *) base; |
| for (n = 0; n < 32; ++n) { |
| printf("R%.2d = %.8x%s", n, fp->gpr[n], |
| (n & 3) == 3? "\n": " "); |
| if (n == 12 && !FULL_REGS(fp)) { |
| printf("\n"); |
| break; |
| } |
| } |
| printf("pc = %.8x msr = %.8x lr = %.8x cr = %.8x\n", |
| fp->nip, fp->msr, fp->link, fp->ccr); |
| printf("ctr = %.8x xer = %.8x trap = %4x\n", |
| fp->ctr, fp->xer, fp->trap); |
| } |
| |
| void |
| cacheflush(void) |
| { |
| int cmd; |
| unsigned nflush; |
| |
| cmd = inchar(); |
| if (cmd != 'i') |
| termch = cmd; |
| scanhex(&adrs); |
| if (termch != '\n') |
| termch = 0; |
| nflush = 1; |
| scanhex(&nflush); |
| nflush = (nflush + 31) / 32; |
| if (cmd != 'i') { |
| for (; nflush > 0; --nflush, adrs += 0x20) |
| cflush((void *) adrs); |
| } else { |
| for (; nflush > 0; --nflush, adrs += 0x20) |
| cinval((void *) adrs); |
| } |
| } |
| |
| unsigned int |
| read_spr(int n) |
| { |
| unsigned int instrs[2]; |
| int (*code)(void); |
| |
| instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); |
| instrs[1] = 0x4e800020; |
| store_inst(instrs); |
| store_inst(instrs+1); |
| code = (int (*)(void)) instrs; |
| return code(); |
| } |
| |
| void |
| write_spr(int n, unsigned int val) |
| { |
| unsigned int instrs[2]; |
| int (*code)(unsigned int); |
| |
| instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); |
| instrs[1] = 0x4e800020; |
| store_inst(instrs); |
| store_inst(instrs+1); |
| code = (int (*)(unsigned int)) instrs; |
| code(val); |
| } |
| |
| static unsigned int regno; |
| extern char exc_prolog; |
| extern char dec_exc; |
| |
| void |
| super_regs(void) |
| { |
| int i, cmd; |
| unsigned val; |
| |
| cmd = skipbl(); |
| if (cmd == '\n') { |
| printf("msr = %x, pvr = %x\n", get_msr(), get_pvr()); |
| printf("sprg0-3 = %x %x %x %x\n", get_sprg0(), get_sprg1(), |
| get_sprg2(), get_sprg3()); |
| printf("srr0 = %x, srr1 = %x\n", get_srr0(), get_srr1()); |
| #ifdef CONFIG_PPC_STD_MMU |
| printf("sr0-15 ="); |
| for (i = 0; i < 16; ++i) |
| printf(" %x", get_sr(i)); |
| printf("\n"); |
| #endif |
| asm("mr %0,1" : "=r" (i) :); |
| printf("sp = %x ", i); |
| asm("mr %0,2" : "=r" (i) :); |
| printf("toc = %x\n", i); |
| return; |
| } |
| |
| scanhex(®no); |
| switch (cmd) { |
| case 'w': |
| val = read_spr(regno); |
| scanhex(&val); |
| write_spr(regno, val); |
| /* fall through */ |
| case 'r': |
| printf("spr %x = %x\n", regno, read_spr(regno)); |
| break; |
| case 's': |
| val = get_sr(regno); |
| scanhex(&val); |
| set_sr(regno, val); |
| break; |
| case 'm': |
| val = get_msr(); |
| scanhex(&val); |
| set_msr(val); |
| break; |
| } |
| scannl(); |
| } |
| |
| #ifndef CONFIG_PPC_STD_MMU |
| static void |
| dump_hash_table(void) |
| { |
| printf("This CPU doesn't have a hash table.\n"); |
| } |
| #else |
| |
| #ifndef CONFIG_PPC64BRIDGE |
| static void |
| dump_hash_table_seg(unsigned seg, unsigned start, unsigned end) |
| { |
| extern void *Hash; |
| extern unsigned long Hash_size; |
| unsigned *htab = Hash; |
| unsigned hsize = Hash_size; |
| unsigned v, hmask, va, last_va = 0; |
| int found, last_found, i; |
| unsigned *hg, w1, last_w2 = 0, last_va0 = 0; |
| |
| last_found = 0; |
| hmask = hsize / 64 - 1; |
| va = start; |
| start = (start >> 12) & 0xffff; |
| end = (end >> 12) & 0xffff; |
| for (v = start; v < end; ++v) { |
| found = 0; |
| hg = htab + (((v ^ seg) & hmask) * 16); |
| w1 = 0x80000000 | (seg << 7) | (v >> 10); |
| for (i = 0; i < 8; ++i, hg += 2) { |
| if (*hg == w1) { |
| found = 1; |
| break; |
| } |
| } |
| if (!found) { |
| w1 ^= 0x40; |
| hg = htab + ((~(v ^ seg) & hmask) * 16); |
| for (i = 0; i < 8; ++i, hg += 2) { |
| if (*hg == w1) { |
| found = 1; |
| break; |
| } |
| } |
| } |
| if (!(last_found && found && (hg[1] & ~0x180) == last_w2 + 4096)) { |
| if (last_found) { |
| if (last_va != last_va0) |
| printf(" ... %x", last_va); |
| printf("\n"); |
| } |
| if (found) { |
| printf("%x to %x", va, hg[1]); |
| last_va0 = va; |
| } |
| last_found = found; |
| } |
| if (found) { |
| last_w2 = hg[1] & ~0x180; |
| last_va = va; |
| } |
| va += 4096; |
| } |
| if (last_found) |
| printf(" ... %x\n", last_va); |
| } |
| |
| #else /* CONFIG_PPC64BRIDGE */ |
| static void |
| dump_hash_table_seg(unsigned seg, unsigned start, unsigned end) |
| { |
| extern void *Hash; |
| extern unsigned long Hash_size; |
| unsigned *htab = Hash; |
| unsigned hsize = Hash_size; |
| unsigned v, hmask, va, last_va; |
| int found, last_found, i; |
| unsigned *hg, w1, last_w2, last_va0; |
| |
| last_found = 0; |
| hmask = hsize / 128 - 1; |
| va = start; |
| start = (start >> 12) & 0xffff; |
| end = (end >> 12) & 0xffff; |
| for (v = start; v < end; ++v) { |
| found = 0; |
| hg = htab + (((v ^ seg) & hmask) * 32); |
| w1 = 1 | (seg << 12) | ((v & 0xf800) >> 4); |
| for (i = 0; i < 8; ++i, hg += 4) { |
| if (hg[1] == w1) { |
| found = 1; |
| break; |
| } |
| } |
| if (!found) { |
| w1 ^= 2; |
| hg = htab + ((~(v ^ seg) & hmask) * 32); |
| for (i = 0; i < 8; ++i, hg += 4) { |
| if (hg[1] == w1) { |
| found = 1; |
| break; |
| } |
| } |
| } |
| if (!(last_found && found && (hg[3] & ~0x180) == last_w2 + 4096)) { |
| if (last_found) { |
| if (last_va != last_va0) |
| printf(" ... %x", last_va); |
| printf("\n"); |
| } |
| if (found) { |
| printf("%x to %x", va, hg[3]); |
| last_va0 = va; |
| } |
| last_found = found; |
| } |
| if (found) { |
| last_w2 = hg[3] & ~0x180; |
| last_va = va; |
| } |
| va += 4096; |
| } |
| if (last_found) |
| printf(" ... %x\n", last_va); |
| } |
| #endif /* CONFIG_PPC64BRIDGE */ |
| |
| static unsigned hash_ctx; |
| static unsigned hash_start; |
| static unsigned hash_end; |
| |
| static void |
| dump_hash_table(void) |
| { |
| int seg; |
| unsigned seg_start, seg_end; |
| |
| hash_ctx = 0; |
| hash_start = 0; |
| hash_end = 0xfffff000; |
| scanhex(&hash_ctx); |
| scanhex(&hash_start); |
| scanhex(&hash_end); |
| printf("Mappings for context %x\n", hash_ctx); |
| seg_start = hash_start; |
| for (seg = hash_start >> 28; seg <= hash_end >> 28; ++seg) { |
| seg_end = (seg << 28) | 0x0ffff000; |
| if (seg_end > hash_end) |
| seg_end = hash_end; |
| dump_hash_table_seg((hash_ctx << 4) + (seg * 0x111), |
| seg_start, seg_end); |
| seg_start = seg_end + 0x1000; |
| } |
| } |
| #endif /* CONFIG_PPC_STD_MMU */ |
| |
| /* |
| * Stuff for reading and writing memory safely |
| */ |
| |
| int |
| mread(unsigned adrs, void *buf, int size) |
| { |
| volatile int n; |
| char *p, *q; |
| |
| n = 0; |
| if( setjmp(bus_error_jmp) == 0 ){ |
| debugger_fault_handler = handle_fault; |
| sync(); |
| p = (char *) adrs; |
| q = (char *) buf; |
| switch (size) { |
| case 2: *(short *)q = *(short *)p; break; |
| case 4: *(int *)q = *(int *)p; break; |
| default: |
| for( ; n < size; ++n ) { |
| *q++ = *p++; |
| sync(); |
| } |
| } |
| sync(); |
| /* wait a little while to see if we get a machine check */ |
| __delay(200); |
| n = size; |
| } |
| debugger_fault_handler = NULL; |
| return n; |
| } |
| |
| int |
| mwrite(unsigned adrs, void *buf, int size) |
| { |
| volatile int n; |
| char *p, *q; |
| |
| n = 0; |
| if( setjmp(bus_error_jmp) == 0 ){ |
| debugger_fault_handler = handle_fault; |
| sync(); |
| p = (char *) adrs; |
| q = (char *) buf; |
| switch (size) { |
| case 2: *(short *)p = *(short *)q; break; |
| case 4: *(int *)p = *(int *)q; break; |
| default: |
| for( ; n < size; ++n ) { |
| *p++ = *q++; |
| sync(); |
| } |
| } |
| sync(); |
| n = size; |
| } else { |
| printf("*** Error writing address %x\n", adrs + n); |
| } |
| debugger_fault_handler = NULL; |
| return n; |
| } |
| |
| static int fault_type; |
| static int fault_except; |
| static char *fault_chars[] = { "--", "**", "##" }; |
| |
| static void |
| handle_fault(struct pt_regs *regs) |
| { |
| fault_except = TRAP(regs); |
| fault_type = TRAP(regs) == 0x200? 0: TRAP(regs) == 0x300? 1: 2; |
| longjmp(bus_error_jmp, 1); |
| } |
| |
| #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) |
| |
| void |
| byterev(unsigned char *val, int size) |
| { |
| int t; |
| |
| switch (size) { |
| case 2: |
| SWAP(val[0], val[1], t); |
| break; |
| case 4: |
| SWAP(val[0], val[3], t); |
| SWAP(val[1], val[2], t); |
| break; |
| } |
| } |
| |
| static int brev; |
| static int mnoread; |
| |
| void |
| memex(void) |
| { |
| int cmd, inc, i, nslash; |
| unsigned n; |
| unsigned char val[4]; |
| |
| last_cmd = "m\n"; |
| scanhex(&adrs); |
| while ((cmd = skipbl()) != '\n') { |
| switch( cmd ){ |
| case 'b': size = 1; break; |
| case 'w': size = 2; break; |
| case 'l': size = 4; break; |
| case 'r': brev = !brev; break; |
| case 'n': mnoread = 1; break; |
| case '.': mnoread = 0; break; |
| } |
| } |
| if( size <= 0 ) |
| size = 1; |
| else if( size > 4 ) |
| size = 4; |
| for(;;){ |
| if (!mnoread) |
| n = mread(adrs, val, size); |
| printf("%.8x%c", adrs, brev? 'r': ' '); |
| if (!mnoread) { |
| if (brev) |
| byterev(val, size); |
| putchar(' '); |
| for (i = 0; i < n; ++i) |
| printf("%.2x", val[i]); |
| for (; i < size; ++i) |
| printf("%s", fault_chars[fault_type]); |
| } |
| putchar(' '); |
| inc = size; |
| nslash = 0; |
| for(;;){ |
| if( scanhex(&n) ){ |
| for (i = 0; i < size; ++i) |
| val[i] = n >> (i * 8); |
| if (!brev) |
| byterev(val, size); |
| mwrite(adrs, val, size); |
| inc = size; |
| } |
| cmd = skipbl(); |
| if (cmd == '\n') |
| break; |
| inc = 0; |
| switch (cmd) { |
| case '\'': |
| for(;;){ |
| n = inchar(); |
| if( n == '\\' ) |
| n = bsesc(); |
| else if( n == '\'' ) |
| break; |
| for (i = 0; i < size; ++i) |
| val[i] = n >> (i * 8); |
| if (!brev) |
| byterev(val, size); |
| mwrite(adrs, val, size); |
| adrs += size; |
| } |
| adrs -= size; |
| inc = size; |
| break; |
| case ',': |
| adrs += size; |
| break; |
| case '.': |
| mnoread = 0; |
| break; |
| case ';': |
| break; |
| case 'x': |
| case EOF: |
| scannl(); |
| return; |
| case 'b': |
| case 'v': |
| size = 1; |
| break; |
| case 'w': |
| size = 2; |
| break; |
| case 'l': |
| size = 4; |
| break; |
| case '^': |
| adrs -= size; |
| break; |
| break; |
| case '/': |
| if (nslash > 0) |
| adrs -= 1 << nslash; |
| else |
| nslash = 0; |
| nslash += 4; |
| adrs += 1 << nslash; |
| break; |
| case '\\': |
| if (nslash < 0) |
| adrs += 1 << -nslash; |
| else |
| nslash = 0; |
| nslash -= 4; |
| adrs -= 1 << -nslash; |
| break; |
| case 'm': |
| scanhex(&adrs); |
| break; |
| case 'n': |
| mnoread = 1; |
| break; |
| case 'r': |
| brev = !brev; |
| break; |
| case '<': |
| n = size; |
| scanhex(&n); |
| adrs -= n; |
| break; |
| case '>': |
| n = size; |
| scanhex(&n); |
| adrs += n; |
| break; |
| } |
| } |
| adrs += inc; |
| } |
| } |
| |
| int |
| bsesc(void) |
| { |
| int c; |
| |
| c = inchar(); |
| switch( c ){ |
| case 'n': c = '\n'; break; |
| case 'r': c = '\r'; break; |
| case 'b': c = '\b'; break; |
| case 't': c = '\t'; break; |
| } |
| return c; |
| } |
| |
| void |
| dump(void) |
| { |
| int c; |
| |
| c = inchar(); |
| if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n') |
| termch = c; |
| scanhex(&adrs); |
| if( termch != '\n') |
| termch = 0; |
| if( c == 'i' ){ |
| scanhex(&nidump); |
| if( nidump == 0 ) |
| nidump = 16; |
| adrs += ppc_inst_dump(adrs, nidump); |
| last_cmd = "di\n"; |
| } else { |
| scanhex(&ndump); |
| if( ndump == 0 ) |
| ndump = 64; |
| prdump(adrs, ndump); |
| adrs += ndump; |
| last_cmd = "d\n"; |
| } |
| } |
| |
| void |
| prdump(unsigned adrs, int ndump) |
| { |
| register int n, m, c, r, nr; |
| unsigned char temp[16]; |
| |
| for( n = ndump; n > 0; ){ |
| printf("%.8x", adrs); |
| putchar(' '); |
| r = n < 16? n: 16; |
| nr = mread(adrs, temp, r); |
| adrs += nr; |
| for( m = 0; m < r; ++m ){ |
| putchar((m & 3) == 0 && m > 0? '.': ' '); |
| if( m < nr ) |
| printf("%.2x", temp[m]); |
| else |
| printf("%s", fault_chars[fault_type]); |
| } |
| for(; m < 16; ++m ) |
| printf(" "); |
| printf(" |"); |
| for( m = 0; m < r; ++m ){ |
| if( m < nr ){ |
| c = temp[m]; |
| putchar(' ' <= c && c <= '~'? c: '.'); |
| } else |
| putchar(' '); |
| } |
| n -= r; |
| for(; m < 16; ++m ) |
| putchar(' '); |
| printf("|\n"); |
| if( nr < r ) |
| break; |
| } |
| } |
| |
| int |
| ppc_inst_dump(unsigned adr, int count) |
| { |
| int nr, dotted; |
| unsigned first_adr; |
| unsigned long inst, last_inst = 0; |
| unsigned char val[4]; |
| |
| dotted = 0; |
| for (first_adr = adr; count > 0; --count, adr += 4){ |
| nr = mread(adr, val, 4); |
| if( nr == 0 ){ |
| const char *x = fault_chars[fault_type]; |
| printf("%.8x %s%s%s%s\n", adr, x, x, x, x); |
| break; |
| } |
| inst = GETWORD(val); |
| if (adr > first_adr && inst == last_inst) { |
| if (!dotted) { |
| printf(" ...\n"); |
| dotted = 1; |
| } |
| continue; |
| } |
| dotted = 0; |
| last_inst = inst; |
| printf("%.8x ", adr); |
| printf("%.8x\t", inst); |
| print_insn_big_powerpc(stdout, inst, adr); /* always returns 4 */ |
| printf("\n"); |
| } |
| return adr - first_adr; |
| } |
| |
| void |
| print_address(unsigned addr) |
| { |
| printf("0x%x", addr); |
| } |
| |
| /* |
| * Memory operations - move, set, print differences |
| */ |
| static unsigned mdest; /* destination address */ |
| static unsigned msrc; /* source address */ |
| static unsigned mval; /* byte value to set memory to */ |
| static unsigned mcount; /* # bytes to affect */ |
| static unsigned mdiffs; /* max # differences to print */ |
| |
| void |
| memops(int cmd) |
| { |
| scanhex(&mdest); |
| if( termch != '\n' ) |
| termch = 0; |
| scanhex(cmd == 's'? &mval: &msrc); |
| if( termch != '\n' ) |
| termch = 0; |
| scanhex(&mcount); |
| switch( cmd ){ |
| case 'm': |
| memmove((void *)mdest, (void *)msrc, mcount); |
| break; |
| case 's': |
| memset((void *)mdest, mval, mcount); |
| break; |
| case 'd': |
| if( termch != '\n' ) |
| termch = 0; |
| scanhex(&mdiffs); |
| memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); |
| break; |
| } |
| } |
| |
| void |
| memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) |
| { |
| unsigned n, prt; |
| |
| prt = 0; |
| for( n = nb; n > 0; --n ) |
| if( *p1++ != *p2++ ) |
| if( ++prt <= maxpr ) |
| printf("%.8x %.2x # %.8x %.2x\n", (unsigned)p1 - 1, |
| p1[-1], (unsigned)p2 - 1, p2[-1]); |
| if( prt > maxpr ) |
| printf("Total of %d differences\n", prt); |
| } |
| |
| static unsigned mend; |
| static unsigned mask; |
| |
| void |
| memlocate(void) |
| { |
| unsigned a, n; |
| unsigned char val[4]; |
| |
| last_cmd = "ml"; |
| scanhex(&mdest); |
| if (termch != '\n') { |
| termch = 0; |
| scanhex(&mend); |
| if (termch != '\n') { |
| termch = 0; |
| scanhex(&mval); |
| mask = ~0; |
| if (termch != '\n') termch = 0; |
| scanhex(&mask); |
| } |
| } |
| n = 0; |
| for (a = mdest; a < mend; a += 4) { |
| if (mread(a, val, 4) == 4 |
| && ((GETWORD(val) ^ mval) & mask) == 0) { |
| printf("%.8x: %.8x\n", a, GETWORD(val)); |
| if (++n >= 10) |
| break; |
| } |
| } |
| } |
| |
| static unsigned mskip = 0x1000; |
| static unsigned mlim = 0xffffffff; |
| |
| void |
| memzcan(void) |
| { |
| unsigned char v; |
| unsigned a; |
| int ok, ook; |
| |
| scanhex(&mdest); |
| if (termch != '\n') termch = 0; |
| scanhex(&mskip); |
| if (termch != '\n') termch = 0; |
| scanhex(&mlim); |
| ook = 0; |
| for (a = mdest; a < mlim; a += mskip) { |
| ok = mread(a, &v, 1); |
| if (ok && !ook) { |
| printf("%.8x .. ", a); |
| fflush(stdout); |
| } else if (!ok && ook) |
| printf("%.8x\n", a - mskip); |
| ook = ok; |
| if (a + mskip < a) |
| break; |
| } |
| if (ook) |
| printf("%.8x\n", a - mskip); |
| } |
| |
| void proccall(void) |
| { |
| unsigned int args[8]; |
| unsigned int ret; |
| int i; |
| typedef unsigned int (*callfunc_t)(unsigned int, unsigned int, |
| unsigned int, unsigned int, unsigned int, |
| unsigned int, unsigned int, unsigned int); |
| callfunc_t func; |
| |
| scanhex(&adrs); |
| if (termch != '\n') |
| termch = 0; |
| for (i = 0; i < 8; ++i) |
| args[i] = 0; |
| for (i = 0; i < 8; ++i) { |
| if (!scanhex(&args[i]) || termch == '\n') |
| break; |
| termch = 0; |
| } |
| func = (callfunc_t) adrs; |
| ret = 0; |
| if (setjmp(bus_error_jmp) == 0) { |
| debugger_fault_handler = handle_fault; |
| sync(); |
| ret = func(args[0], args[1], args[2], args[3], |
| args[4], args[5], args[6], args[7]); |
| sync(); |
| printf("return value is %x\n", ret); |
| } else { |
| printf("*** %x exception occurred\n", fault_except); |
| } |
| debugger_fault_handler = NULL; |
| } |
| |
| /* Input scanning routines */ |
| int |
| skipbl(void) |
| { |
| int c; |
| |
| if( termch != 0 ){ |
| c = termch; |
| termch = 0; |
| } else |
| c = inchar(); |
| while( c == ' ' || c == '\t' ) |
| c = inchar(); |
| return c; |
| } |
| |
| #define N_PTREGS 44 |
| static char *regnames[N_PTREGS] = { |
| "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", |
| "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", |
| "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", "mq", |
| "trap", "dar", "dsisr", "res" |
| }; |
| |
| int |
| scanhex(unsigned *vp) |
| { |
| int c, d; |
| unsigned v; |
| |
| c = skipbl(); |
| if (c == '%') { |
| /* parse register name */ |
| char regname[8]; |
| int i; |
| |
| for (i = 0; i < sizeof(regname) - 1; ++i) { |
| c = inchar(); |
| if (!isalnum(c)) { |
| termch = c; |
| break; |
| } |
| regname[i] = c; |
| } |
| regname[i] = 0; |
| for (i = 0; i < N_PTREGS; ++i) { |
| if (strcmp(regnames[i], regname) == 0) { |
| unsigned *rp = (unsigned *) |
| xmon_regs[smp_processor_id()]; |
| if (rp == NULL) { |
| printf("regs not available\n"); |
| return 0; |
| } |
| *vp = rp[i]; |
| return 1; |
| } |
| } |
| printf("invalid register name '%%%s'\n", regname); |
| return 0; |
| } else if (c == '$') { |
| static char symname[128]; |
| int i; |
| for (i=0; i<63; i++) { |
| c = inchar(); |
| if (isspace(c)) { |
| termch = c; |
| break; |
| } |
| symname[i] = c; |
| } |
| symname[i++] = 0; |
| *vp = 0; |
| if (setjmp(bus_error_jmp) == 0) { |
| debugger_fault_handler = handle_fault; |
| sync(); |
| *vp = kallsyms_lookup_name(symname); |
| sync(); |
| } |
| debugger_fault_handler = NULL; |
| if (!(*vp)) { |
| printf("unknown symbol\n"); |
| return 0; |
| } |
| return 1; |
| } |
| |
| d = hexdigit(c); |
| if( d == EOF ){ |
| termch = c; |
| return 0; |
| } |
| v = 0; |
| do { |
| v = (v << 4) + d; |
| c = inchar(); |
| d = hexdigit(c); |
| } while( d != EOF ); |
| termch = c; |
| *vp = v; |
| return 1; |
| } |
| |
| void |
| scannl(void) |
| { |
| int c; |
| |
| c = termch; |
| termch = 0; |
| while( c != '\n' ) |
| c = inchar(); |
| } |
| |
| int hexdigit(int c) |
| { |
| if( '0' <= c && c <= '9' ) |
| return c - '0'; |
| if( 'A' <= c && c <= 'F' ) |
| return c - ('A' - 10); |
| if( 'a' <= c && c <= 'f' ) |
| return c - ('a' - 10); |
| return EOF; |
| } |
| |
| void |
| getstring(char *s, int size) |
| { |
| int c; |
| |
| c = skipbl(); |
| do { |
| if( size > 1 ){ |
| *s++ = c; |
| --size; |
| } |
| c = inchar(); |
| } while( c != ' ' && c != '\t' && c != '\n' ); |
| termch = c; |
| *s = 0; |
| } |
| |
| static char line[256]; |
| static char *lineptr; |
| |
| void |
| flush_input(void) |
| { |
| lineptr = NULL; |
| } |
| |
| int |
| inchar(void) |
| { |
| if (lineptr == NULL || *lineptr == 0) { |
| if (fgets(line, sizeof(line), stdin) == NULL) { |
| lineptr = NULL; |
| return EOF; |
| } |
| lineptr = line; |
| } |
| return *lineptr++; |
| } |
| |
| void |
| take_input(char *str) |
| { |
| lineptr = str; |
| } |
| |
| static void |
| symbol_lookup(void) |
| { |
| int type = inchar(); |
| unsigned addr; |
| static char tmp[128]; |
| |
| switch (type) { |
| case 'a': |
| if (scanhex(&addr)) |
| xmon_print_symbol(addr, ": ", "\n"); |
| termch = 0; |
| break; |
| case 's': |
| getstring(tmp, 64); |
| if (setjmp(bus_error_jmp) == 0) { |
| debugger_fault_handler = handle_fault; |
| sync(); |
| addr = kallsyms_lookup_name(tmp); |
| if (addr) |
| printf("%s: %lx\n", tmp, addr); |
| else |
| printf("Symbol '%s' not found.\n", tmp); |
| sync(); |
| } |
| debugger_fault_handler = NULL; |
| termch = 0; |
| break; |
| } |
| } |
| |