/* * Routines providing a simple monitor for use on the PowerMac. * * Copyright (C) 1996 Paul Mackerras. * * 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/config.h> #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 <asm/ptrace.h> #include <asm/string.h> #include <asm/prom.h> #include <asm/machdep.h> #include <asm/processor.h> #include <asm/pgtable.h> #include <asm/mmu.h> #include <asm/mmu_context.h> #include <asm/naca.h> #include <asm/paca.h> #include <asm/ppcdebug.h> #include <asm/cputable.h> #include "nonstdio.h" #include "privinst.h" #define scanhex xmon_scanhex #define skipbl xmon_skipbl #ifdef CONFIG_SMP volatile cpumask_t cpus_in_xmon = CPU_MASK_NONE; static unsigned long got_xmon = 0; static volatile int take_xmon = -1; static volatile int leaving_xmon = 0; #endif /* CONFIG_SMP */ static unsigned long adrs; static int size = 1; static unsigned long ndump = 64; static unsigned long nidump = 16; static unsigned long ncsum = 4096; static int termch; static u_int bus_error_jmp[100]; #define setjmp xmon_setjmp #define longjmp xmon_longjmp /* Max number of stack frames we are willing to produce on a backtrace. */ #define MAXFRAMECOUNT 50 /* Breakpoint stuff */ struct bpt { unsigned long address; unsigned instr; unsigned long 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 */ 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); void print_address(unsigned long); static int getsp(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 void openforth(void); */ 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 struct bpt *at_breakpoint(unsigned long pc); static void bpt_cmds(void); static void cacheflush(void); #ifdef CONFIG_SMP static void cpu_cmd(void); #endif /* CONFIG_SMP */ static void csum(void); static void bootcmds(void); void dump_segments(void); static void debug_trace(void); extern int print_insn_big_powerpc(FILE *, unsigned long, unsigned long); extern void printf(const char *fmt, ...); extern void xmon_vfprintf(void *f, const char *fmt, va_list ap); extern int xmon_putc(int c, void *f); extern int putchar(int ch); extern int xmon_read_poll(void); extern int setjmp(u_int *); extern void longjmp(u_int *, int); extern unsigned long _ASR; pte_t *find_linux_pte(pgd_t *pgdir, unsigned long va); /* from htab.c */ #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\ ci send xmon interrupt to all other cpus\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\ e print exception information\n\ f flush cache\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 show the task list\n\ r print registers\n\ s single step\n\ S print special registers\n\ t print backtrace\n\ T Enable/Disable PPCDBG flags\n\ x exit monitor\n\ u dump segment table or SLB\n\ ? help\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]; void __xmon_print_symbol(const char *fmt, unsigned long address); #define xmon_print_symbol(fmt, addr) \ do { \ __check_printsym_format(fmt, ""); \ __xmon_print_symbol(fmt, addr); \ } while(0) /* * Stuff for reading and writing memory safely */ extern inline void sync(void) { asm volatile("sync; isync"); } /* (Ref: 64-bit PowerPC ELF ABI Spplement; Ian Lance Taylor, Zembu Labs). A PPC stack frame looks like this: High Address Back Chain FP reg save area GP reg save area Local var space Parameter save area (SP+48) TOC save area (SP+40) link editor doubleword (SP+32) compiler doubleword (SP+24) LR save (SP+16) CR save (SP+8) Back Chain (SP+0) Note that the LR (ret addr) may not be saved in the current frame if no functions have been called from the current function. */ #define SURVEILLANCE_TOKEN 9000 static inline void disable_surveillance(void) { #ifndef CONFIG_PPC_ISERIES rtas_call(rtas_token("set-indicator"), 3, 1, NULL, SURVEILLANCE_TOKEN, 0, 0); #endif } int xmon(struct pt_regs *excp) { struct pt_regs regs; int cmd = 0; unsigned long msr; if (excp == NULL) { /* Ok, grab regs as they are now. This won't do a particularily good job because the prologue has already been executed. ToDo: We could reach back into the callers save area to do a better job of representing the caller's state. */ asm volatile ("std 0,0(%0)\n\ std 1,8(%0)\n\ std 2,16(%0)\n\ std 3,24(%0)\n\ std 4,32(%0)\n\ std 5,40(%0)\n\ std 6,48(%0)\n\ std 7,56(%0)\n\ std 8,64(%0)\n\ std 9,72(%0)\n\ std 10,80(%0)\n\ std 11,88(%0)\n\ std 12,96(%0)\n\ std 13,104(%0)\n\ std 14,112(%0)\n\ std 15,120(%0)\n\ std 16,128(%0)\n\ std 17,136(%0)\n\ std 18,144(%0)\n\ std 19,152(%0)\n\ std 20,160(%0)\n\ std 21,168(%0)\n\ std 22,176(%0)\n\ std 23,184(%0)\n\ std 24,192(%0)\n\ std 25,200(%0)\n\ std 26,208(%0)\n\ std 27,216(%0)\n\ std 28,224(%0)\n\ std 29,232(%0)\n\ std 30,240(%0)\n\ std 31,248(%0)" : : "b" (®s)); regs.nip = regs.link = ((unsigned long *)(regs.gpr[1]))[2]; 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_msrd(msr & ~MSR_EE); /* disable interrupts */ xmon_regs[smp_processor_id()] = excp; excprint(excp); #ifdef CONFIG_SMP leaving_xmon = 0; /* possible race condition here if a CPU is held up and gets * here while we are exiting */ if (cpu_test_and_set(smp_processor_id(), cpus_in_xmon)) { /* xmon probably caused an exception itself */ printf("We are already in xmon\n"); for (;;) cpu_relax(); } while (test_and_set_bit(0, &got_xmon)) { if (take_xmon == smp_processor_id()) { take_xmon = -1; break; } cpu_relax(); } /* * XXX: breakpoints are removed while any cpu is in xmon */ #endif /* CONFIG_SMP */ remove_bpts(); disable_surveillance(); printf("press ? for help "); cmd = cmds(excp); if (cmd == 's') { xmon_trace[smp_processor_id()] = SSTEP; excp->msr |= MSR_SE; #ifdef CONFIG_SMP take_xmon = smp_processor_id(); #endif } else if (at_breakpoint(excp->nip)) { xmon_trace[smp_processor_id()] = BRSTEP; excp->msr |= MSR_SE; } else { xmon_trace[smp_processor_id()] = 0; insert_bpts(); } xmon_regs[smp_processor_id()] = 0; #ifdef CONFIG_SMP leaving_xmon = 1; if (cmd != 's') clear_bit(0, &got_xmon); cpu_clear(smp_processor_id(), cpus_in_xmon); #endif /* CONFIG_SMP */ set_msrd(msr); /* restore interrupt enable */ return 0; } 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 |= MSR_SE; } else { printf("Stopped at breakpoint %x (%lx ", (bp - bpts) + 1, bp->address); xmon_print_symbol("%s)\n", bp->address); 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 |= MSR_SE; } 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 |= MSR_SE; } else { xmon(regs); } return 1; } static struct bpt * at_breakpoint(unsigned long 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 0; } static void insert_bpts() { 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; } else { store_inst((void *)bp->address); } } if ((cur_cpu_spec->cpu_features & CPU_FTR_DABR) && dabr.enabled) set_dabr(dabr.address); if ((cur_cpu_spec->cpu_features & CPU_FTR_IABR) && iabr.enabled) set_iabr(iabr.address); } static void remove_bpts() { int i; struct bpt *bp; unsigned instr; if ((cur_cpu_spec->cpu_features & CPU_FTR_DABR)) set_dabr(0); if ((cur_cpu_spec->cpu_features & CPU_FTR_IABR)) set_iabr(0); 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); else store_inst((void *)bp->address); } } static char *last_cmd; /* Command interpreting routine */ static int cmds(struct pt_regs *excp) { int cmd = 0; last_cmd = NULL; for(;;) { #ifdef CONFIG_SMP /* Need to check if we should take any commands on this CPU. */ if (leaving_xmon) return cmd; 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; case 'i': show_mem(); break; default: termch = cmd; memex(); } break; case 'd': dump(); 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 's': case 'x': case EOF: return cmd; case '?': printf(help_string); break; case 'p': show_state(); break; case 'b': bpt_cmds(); break; case 'C': csum(); break; #ifdef CONFIG_SMP case 'c': cpu_cmd(); break; #endif /* CONFIG_SMP */ case 'z': bootcmds(); case 'T': debug_trace(); break; case 'u': dump_segments(); break; 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; } cpu_relax(); } } 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 long cpu; int timeout; int cmd; cmd = inchar(); if (cmd == 'i') { printf("stopping all cpus\n"); /* interrupt other cpu(s) */ cpu = MSG_ALL_BUT_SELF; smp_send_debugger_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 (cpu_isset(cpu, cpus_in_xmon)) { printf(" %x", 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; } cpu_relax(); } } #endif /* CONFIG_SMP */ static unsigned short fcstab[256] = { 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 }; #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) static void csum(void) { unsigned int i; unsigned short fcs; unsigned char v; if (!scanhex(&adrs)) return; if (!scanhex(&ncsum)) return; fcs = 0xffff; for (i = 0; i < ncsum; ++i) { if (mread(adrs+i, &v, 1) == 0) { printf("csum stopped at %x\n", adrs+i); break; } fcs = FCS(fcs, v); } printf("%x\n", fcs); } static 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 (broken?)\n" "bd <addr> [cnt] set hardware data breakpoint (broken?)\n" ""; static void bpt_cmds(void) { int cmd; unsigned long a; int mode, i; struct bpt *bp; cmd = inchar(); switch (cmd) { case 'd': /* bd - hardware data breakpoint */ if (!(cur_cpu_spec->cpu_features & CPU_FTR_DABR)) { printf("Not implemented on this cpu\n"); break; } mode = 7; cmd = inchar(); if (cmd == 'r') mode = 5; else if (cmd == 'w') mode = 6; 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': /* bi - hardware instr breakpoint */ if (!(cur_cpu_spec->cpu_features & CPU_FTR_IABR)) { printf("Not implemented on POWER4\n"); break; } iabr.address = 0; iabr.count = 0; iabr.enabled = scanhex(&iabr.address); if (iabr.enabled) iabr.address |= 3; scanhex(&iabr.count); break; 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 { if (a <= NBPTS && a >= 1) { /* assume a breakpoint number */ --a; /* bp nums are 1 based */ bp = &bpts[a]; } else { /* assume a breakpoint address */ bp = at_breakpoint(a); } if (bp == 0) { printf("No breakpoint at %x\n", a); } else { printf("Cleared breakpoint %x (%lx ", (bp - bpts) + 1, bp->address); xmon_print_symbol("%s)\n", bp->address); bp->enabled = 0; } } break; case '?': printf(breakpoint_help_string); break; default: termch = cmd; cmd = skipbl(); if (cmd == '?') { printf(breakpoint_help_string); break; } termch = cmd; if (!scanhex(&a)) { /* print all breakpoints */ int bpnum; printf(" type address count\n"); if (dabr.enabled) { printf(" data %.16lx %8x [", dabr.address & ~7, dabr.count); if (dabr.address & 1) printf("r"); if (dabr.address & 2) printf("w"); printf("]\n"); } if (iabr.enabled) printf(" inst %.16lx %8x\n", iabr.address & ~3, iabr.count); for (bp = bpts, bpnum = 1; bp < &bpts[NBPTS]; ++bp, ++bpnum) if (bp->enabled) { printf("%2x trap %.16lx %8x ", bpnum, bp->address, bp->count); xmon_print_symbol("%s\n", bp->address); } break; } if (systemcfg->platform != PLATFORM_POWERMAC && !(systemcfg->platform & PLATFORM_PSERIES)) { printf("Not supported for this platform\n"); 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. Please clear one first.\n"); break; } } bp->enabled = 1; bp->address = a; bp->count = 0; scanhex(&bp->count); printf("Set breakpoint %2x trap %.16lx %8x ", (bp-bpts) + 1, bp->address, bp->count); xmon_print_symbol("%s\n", bp->address); 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; default: ret = ""; } return ret; } static void backtrace(struct pt_regs *excp) { unsigned long sp; unsigned long lr; unsigned long stack[3]; struct pt_regs regs; int framecount; char *funcname; /* declare these as raw ptrs so we don't get func descriptors */ extern void *ret_from_except, *ret_from_syscall_1; if (excp != NULL) { lr = excp->link; sp = excp->gpr[1]; } else { /* Use care not to call any function before this point so the saved lr has a chance of being good. */ asm volatile ("mflr %0" : "=r" (lr) :); sp = getsp(); } scanhex(&sp); scannl(); for (framecount = 0; sp != 0 && framecount < MAXFRAMECOUNT; sp = stack[0], framecount++) { if (mread(sp, stack, sizeof(stack)) != sizeof(stack)) break; #if 0 if (lr != 0) { stack[2] = lr; /* fake out the first saved lr. It may not be saved yet. */ lr = 0; } #endif printf("%.16lx %.16lx", sp, stack[2]); /* TAI -- for now only the ones cast to unsigned long will match. * Need to test the rest... */ if ((stack[2] == (unsigned long)ret_from_except && (funcname = "ret_from_except")) || (stack[2] == (unsigned long)ret_from_syscall_1 && (funcname = "ret_from_syscall_1")) #if 0 || stack[2] == (unsigned) &ret_from_syscall_2 || stack[2] == (unsigned) &do_signal_ret #endif ) { printf(" %s\n", funcname); if (mread(sp+112, ®s, sizeof(regs)) != sizeof(regs)) break; printf("exception: %lx %s regs %lx\n", regs.trap, getvecname(regs.trap), sp+112); printf(" %.16lx", regs.nip); if (regs.nip & 0xffffffff00000000UL) xmon_print_symbol(" %s", regs.nip); printf("\n"); if (regs.gpr[1] < sp) { printf("<Stack drops into userspace %.16lx>\n", regs.gpr[1]); break; } sp = regs.gpr[1]; if (mread(sp, stack, sizeof(stack)) != sizeof(stack)) break; } else { if (stack[2]) xmon_print_symbol(" %s", stack[2]); printf("\n"); } if (stack[0] && stack[0] <= sp) { if ((stack[0] & 0xffffffff00000000UL) == 0) printf("<Stack drops into 32-bit userspace %.16lx>\n", stack[0]); else printf("<Corrupt stack. Next backchain is %.16lx>\n", stack[0]); break; } } if (framecount >= MAXFRAMECOUNT) printf("<Punt. Too many stack frames>\n"); } int getsp() { int x; asm("mr %0,1" : "=r" (x) :); return x; } spinlock_t exception_print_lock = SPIN_LOCK_UNLOCKED; void excprint(struct pt_regs *fp) { unsigned long flags; spin_lock_irqsave(&exception_print_lock, flags); #ifdef CONFIG_SMP printf("cpu %d: ", smp_processor_id()); #endif /* CONFIG_SMP */ printf("Vector: %lx %s at [%lx]\n", fp->trap, getvecname(fp->trap), fp); printf(" pc: %lx", fp->nip); xmon_print_symbol(" (%s)\n", fp->nip); printf(" lr: %lx", fp->link); xmon_print_symbol(" (%s)\n", fp->link); printf(" sp: %lx\n", fp->gpr[1]); printf(" msr: %lx\n", fp->msr); if (fp->trap == 0x300 || fp->trap == 0x380 || fp->trap == 0x600) { printf(" dar: %lx\n", fp->dar); printf(" dsisr: %lx\n", fp->dsisr); } printf(" current = 0x%lx\n", current); printf(" paca = 0x%lx\n", get_paca()); if (current) { printf(" pid = %ld, comm = %s\n", current->pid, current->comm); } spin_unlock_irqrestore(&exception_print_lock, flags); } void prregs(struct pt_regs *fp) { int n; unsigned long base; if (scanhex((void *)&base)) fp = (struct pt_regs *) base; for (n = 0; n < 16; ++n) printf("R%.2ld = %.16lx R%.2ld = %.16lx\n", n, fp->gpr[n], n+16, fp->gpr[n+16]); printf("pc = %.16lx msr = %.16lx\nlr = %.16lx cr = %.16lx\n", fp->nip, fp->msr, fp->link, fp->ccr); printf("ctr = %.16lx xer = %.16lx trap = %8lx\n", fp->ctr, fp->xer, fp->trap); } 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) { __debugger_fault_handler = handle_fault; 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); } __debugger_fault_handler = 0; } unsigned long read_spr(int n) { unsigned int instrs[2]; unsigned long (*code)(void); unsigned long opd[3]; unsigned long ret = -1UL; instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); instrs[1] = 0x4e800020; opd[0] = (unsigned long)instrs; opd[1] = 0; opd[2] = 0; store_inst(instrs); store_inst(instrs+1); code = (unsigned long (*)(void)) opd; if (setjmp(bus_error_jmp) == 0) { __debugger_fault_handler = handle_fault; sync(); ret = code(); sync(); /* wait a little while to see if we get a machine check */ __delay(200); } else { printf("*** Error reading spr %x\n", n); } __debugger_fault_handler = 0; return ret; } void write_spr(int n, unsigned long val) { unsigned int instrs[2]; unsigned long (*code)(unsigned long); unsigned long opd[3]; instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); instrs[1] = 0x4e800020; opd[0] = (unsigned long)instrs; opd[1] = 0; opd[2] = 0; store_inst(instrs); store_inst(instrs+1); code = (unsigned long (*)(unsigned long)) opd; if (setjmp(bus_error_jmp) == 0) { __debugger_fault_handler = handle_fault; sync(); code(val); sync(); /* wait a little while to see if we get a machine check */ __delay(200); } else { printf("*** Error writing spr %x\n", n); } __debugger_fault_handler = 0; } static unsigned long regno; extern char exc_prolog; extern char dec_exc; void super_regs() { int cmd; unsigned long val; #ifdef CONFIG_PPC_ISERIES struct paca_struct *ptrPaca = NULL; struct ItLpPaca *ptrLpPaca = NULL; struct ItLpRegSave *ptrLpRegSave = NULL; #endif cmd = skipbl(); if (cmd == '\n') { unsigned long sp, toc; asm("mr %0,1" : "=r" (sp) :); asm("mr %0,2" : "=r" (toc) :); printf("msr = %.16lx sprg0= %.16lx\n", get_msr(), get_sprg0()); printf("pvr = %.16lx sprg1= %.16lx\n", get_pvr(), get_sprg1()); printf("dec = %.16lx sprg2= %.16lx\n", get_dec(), get_sprg2()); printf("sp = %.16lx sprg3= %.16lx\n", sp, get_sprg3()); printf("toc = %.16lx dar = %.16lx\n", toc, get_dar()); printf("srr0 = %.16lx srr1 = %.16lx\n", get_srr0(), get_srr1()); #ifdef CONFIG_PPC_ISERIES // Dump out relevant Paca data areas. printf("Paca: \n"); ptrPaca = get_paca(); printf(" Local Processor Control Area (LpPaca): \n"); ptrLpPaca = ptrPaca->xLpPacaPtr; printf(" Saved Srr0=%.16lx Saved Srr1=%.16lx \n", ptrLpPaca->xSavedSrr0, ptrLpPaca->xSavedSrr1); printf(" Saved Gpr3=%.16lx Saved Gpr4=%.16lx \n", ptrLpPaca->xSavedGpr3, ptrLpPaca->xSavedGpr4); printf(" Saved Gpr5=%.16lx \n", ptrLpPaca->xSavedGpr5); printf(" Local Processor Register Save Area (LpRegSave): \n"); ptrLpRegSave = ptrPaca->xLpRegSavePtr; printf(" Saved Sprg0=%.16lx Saved Sprg1=%.16lx \n", ptrLpRegSave->xSPRG0, ptrLpRegSave->xSPRG0); printf(" Saved Sprg2=%.16lx Saved Sprg3=%.16lx \n", ptrLpRegSave->xSPRG2, ptrLpRegSave->xSPRG3); printf(" Saved Msr =%.16lx Saved Nia =%.16lx \n", ptrLpRegSave->xMSR, ptrLpRegSave->xNIA); #endif return; } scanhex(®no); switch (cmd) { case 'w': val = read_spr(regno); scanhex(&val); write_spr(regno, val); /* fall through */ case 'r': printf("spr %lx = %lx\n", regno, read_spr(regno)); break; case 'm': val = get_msr(); scanhex(&val); set_msrd(val); break; } scannl(); } int mread(unsigned long 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; case 8: *(long *)q = *(long *)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 = 0; return n; } int mwrite(unsigned long adrs, void *buf, int size) { volatile int n; char *p, *q; n = 0; if (setjmp(bus_error_jmp) == 0) { __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; case 8: *(long *)p = *(long *)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); } __debugger_fault_handler = 0; return n; } static int fault_type; static char *fault_chars[] = { "--", "**", "##" }; static int handle_fault(struct pt_regs *regs) { switch (regs->trap) { case 0x200: fault_type = 0; break; case 0x300: case 0x380: fault_type = 1; break; default: fault_type = 2; } longjmp(bus_error_jmp, 1); return 0; } #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) void byterev(unsigned char *val, int size) { int t; switch (size) { case 2: SWAP(val[0], val[1], t); break; case 4: SWAP(val[0], val[3], t); SWAP(val[1], val[2], t); break; case 8: /* is there really any use for this? */ SWAP(val[0], val[7], t); SWAP(val[1], val[6], t); SWAP(val[2], val[5], t); SWAP(val[3], val[4], t); break; } } static int brev; static int mnoread; static char *memex_help_string = "Memory examine command usage:\n" "m [addr] [flags] examine/change memory\n" " addr is optional. will start where left off.\n" " flags may include chars from this set:\n" " b modify by bytes (default)\n" " w modify by words (2 byte)\n" " l modify by longs (4 byte)\n" " d modify by doubleword (8 byte)\n" " r toggle reverse byte order mode\n" " n do not read memory (for i/o spaces)\n" " . ok to read (default)\n" "NOTE: flags are saved as defaults\n" ""; static char *memex_subcmd_help_string = "Memory examine subcommands:\n" " hexval write this val to current location\n" " 'string' write chars from string to this location\n" " ' increment address\n" " ^ decrement address\n" " / increment addr by 0x10. //=0x100, ///=0x1000, etc\n" " \\ decrement addr by 0x10. \\\\=0x100, \\\\\\=0x1000, etc\n" " ` clear no-read flag\n" " ; stay at this addr\n" " v change to byte mode\n" " w change to word (2 byte) mode\n" " l change to long (4 byte) mode\n" " u change to doubleword (8 byte) mode\n" " m addr change current addr\n" " n toggle no-read flag\n" " r toggle byte reverse flag\n" " < count back up count bytes\n" " > count skip forward count bytes\n" " x exit this mode\n" ""; void memex() { 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("%.16x%c", adrs, brev? 'r': ' '); if (!mnoread) { if (brev) byterev(val, size); putchar(' '); for (i = 0; i < n; ++i) printf("%.2x", val[i]); for (; i < size; ++i) printf("%s", fault_chars[fault_type]); } putchar(' '); inc = size; nslash = 0; for(;;){ if( scanhex(&n) ){ for (i = 0; i < size; ++i) val[i] = n >> (i * 8); if (!brev) byterev(val, size); mwrite(adrs, val, size); inc = size; } cmd = skipbl(); if (cmd == '\n') break; inc = 0; switch (cmd) { case '\'': for(;;){ n = inchar(); if( n == '\\' ) n = bsesc(); else if( n == '\'' ) break; for (i = 0; i < size; ++i) val[i] = n >> (i * 8); if (!brev) byterev(val, size); mwrite(adrs, val, size); adrs += size; } adrs -= size; inc = size; break; case ',': adrs += size; break; case '.': mnoread = 0; break; case ';': break; case 'x': case EOF: scannl(); return; case 'b': case 'v': size = 1; break; case 'w': size = 2; break; case 'l': size = 4; break; case 'u': size = 8; break; case '^': adrs -= size; break; break; case '/': if (nslash > 0) adrs -= 1 << nslash; else nslash = 0; nslash += 4; adrs += 1 << nslash; break; case '\\': if (nslash < 0) adrs += 1 << -nslash; else nslash = 0; nslash -= 4; adrs -= 1 << -nslash; break; case 'm': scanhex((void *)&adrs); break; case 'n': mnoread = 1; break; case 'r': brev = !brev; break; case '<': n = size; scanhex(&n); adrs -= n; break; case '>': n = size; scanhex(&n); adrs += n; break; case '?': printf(memex_subcmd_help_string); break; } } adrs += inc; } } int bsesc() { 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; } #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ || ('a' <= (c) && (c) <= 'f') \ || ('A' <= (c) && (c) <= 'F')) void dump() { 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; 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 long adrs, long ndump) { long n, m, c, r, nr; unsigned char temp[16]; for( n = ndump; n > 0; ){ printf("%.16lx", adrs); putchar(' '); r = n < 16? n: 16; nr = mread(adrs, temp, r); adrs += nr; for( m = 0; m < r; ++m ){ if ((m & 7) == 0 && m > 0) putchar(' '); 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 long adr, long count) { int nr, dotted; unsigned long first_adr; unsigned long inst, last_inst; 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("%.16lx %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("%.16lx ", 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 long addr) { printf("0x%lx", addr); } /* * Memory operations - move, set, print differences */ static unsigned long mdest; /* destination address */ static unsigned long msrc; /* source address */ static unsigned long mval; /* byte value to set memory to */ static unsigned long mcount; /* # bytes to affect */ static unsigned long mdiffs; /* max # differences to print */ void memops(int cmd) { scanhex((void *)&mdest); if( termch != '\n' ) termch = 0; scanhex((void *)(cmd == 's'? &mval: &msrc)); if( termch != '\n' ) termch = 0; scanhex((void *)&mcount); switch( cmd ){ case 'm': memmove((void *)mdest, (void *)msrc, mcount); break; case 's': memset((void *)mdest, mval, mcount); break; case 'd': if( termch != '\n' ) termch = 0; scanhex((void *)&mdiffs); memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); break; } } void memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) { unsigned n, prt; prt = 0; for( n = nb; n > 0; --n ) if( *p1++ != *p2++ ) if( ++prt <= maxpr ) printf("%.16x %.2x # %.16x %.2x\n", p1 - 1, p1[-1], p2 - 1, p2[-1]); if( prt > maxpr ) printf("Total of %d differences\n", prt); } static unsigned mend; static unsigned mask; void memlocate() { unsigned a, n; unsigned char val[4]; last_cmd = "ml"; scanhex((void *)&mdest); if (termch != '\n') { termch = 0; scanhex((void *)&mend); if (termch != '\n') { termch = 0; scanhex((void *)&mval); mask = ~0; if (termch != '\n') termch = 0; scanhex((void *)&mask); } } n = 0; for (a = mdest; a < mend; a += 4) { if (mread(a, val, 4) == 4 && ((GETWORD(val) ^ mval) & mask) == 0) { printf("%.16x: %.16x\n", a, GETWORD(val)); if (++n >= 10) break; } } } static unsigned long mskip = 0x1000; static unsigned long mlim = 0xffffffff; void memzcan() { 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); } /* Input scanning routines */ int skipbl() { 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(vp) 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) { unsigned long *rp = (unsigned long *) 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; } 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() { 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() { lineptr = NULL; } int inchar() { if (lineptr == NULL || *lineptr == 0) { if (fgets(line, sizeof(line), stdin) == NULL) { lineptr = NULL; return EOF; } lineptr = line; } return *lineptr++; } void take_input(str) char *str; { lineptr = str; } /* xmon version of __print_symbol */ void __xmon_print_symbol(const char *fmt, unsigned long address) { char *modname; const char *name; unsigned long offset, size; char namebuf[128]; if (setjmp(bus_error_jmp) == 0) { __debugger_fault_handler = handle_fault; sync(); name = kallsyms_lookup(address, &size, &offset, &modname, namebuf); sync(); /* wait a little while to see if we get a machine check */ __delay(200); } else { name = "symbol lookup failed"; } __debugger_fault_handler = 0; if (!name) { char addrstr[sizeof("0x%lx") + (BITS_PER_LONG*3/10)]; sprintf(addrstr, "0x%lx", address); printf(fmt, addrstr); return; } if (modname) { /* This is pretty small. */ char buffer[sizeof("%s+%#lx/%#lx [%s]") + strlen(name) + 2*(BITS_PER_LONG*3/10) + strlen(modname)]; sprintf(buffer, "%s+%#lx/%#lx [%s]", name, offset, size, modname); printf(fmt, buffer); } else { char buffer[sizeof("%s+%#lx/%#lx") + strlen(name) + 2*(BITS_PER_LONG*3/10)]; sprintf(buffer, "%s+%#lx/%#lx", name, offset, size); printf(fmt, buffer); } } static void debug_trace(void) { unsigned long val, cmd, on; cmd = skipbl(); if (cmd == '\n') { /* show current state */ unsigned long i; printf("naca->debug_switch = 0x%lx\n", naca->debug_switch); for (i = 0; i < PPCDBG_NUM_FLAGS ;i++) { on = PPCDBG_BITVAL(i) & naca->debug_switch; printf("%02x %s %12s ", i, on ? "on " : "off", trace_names[i] ? trace_names[i] : ""); if (((i+1) % 3) == 0) printf("\n"); } printf("\n"); return; } while (cmd != '\n') { on = 1; /* default if no sign given */ while (cmd == '+' || cmd == '-') { on = (cmd == '+'); cmd = inchar(); if (cmd == ' ' || cmd == '\n') { /* Turn on or off based on + or - */ naca->debug_switch = on ? PPCDBG_ALL:PPCDBG_NONE; printf("Setting all values to %s...\n", on ? "on" : "off"); if (cmd == '\n') return; else cmd = skipbl(); } else termch = cmd; } termch = cmd; /* not +/- ... let scanhex see it */ scanhex((void *)&val); if (val >= 64) { printf("Value %x out of range:\n", val); return; } if (on) { naca->debug_switch |= PPCDBG_BITVAL(val); printf("enable debug %x %s\n", val, trace_names[val] ? trace_names[val] : ""); } else { naca->debug_switch &= ~PPCDBG_BITVAL(val); printf("disable debug %x %s\n", val, trace_names[val] ? trace_names[val] : ""); } cmd = skipbl(); } } static void dump_slb(void) { int i; unsigned long tmp; printf("SLB contents of cpu %d\n", smp_processor_id()); for (i = 0; i < naca->slb_size; i++) { asm volatile("slbmfee %0,%1" : "=r" (tmp) : "r" (i)); printf("%02d %016lx ", i, tmp); asm volatile("slbmfev %0,%1" : "=r" (tmp) : "r" (i)); printf("%016lx\n", tmp); } } static void dump_stab(void) { int i; unsigned long *tmp = (unsigned long *)get_paca()->xStab_data.virt; printf("Segment table contents of cpu %d\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 xmon_init(void) { __debugger = xmon; __debugger_bpt = xmon_bpt; __debugger_sstep = xmon_sstep; __debugger_iabr_match = xmon_iabr_match; __debugger_dabr_match = xmon_dabr_match; } void dump_segments(void) { if (cur_cpu_spec->cpu_features & CPU_FTR_SLB) dump_slb(); else dump_stab(); }