diff options
Diffstat (limited to 'arch/ppc/xmon/xmon.c')
| -rw-r--r-- | arch/ppc/xmon/xmon.c | 1780 |
1 files changed, 0 insertions, 1780 deletions
diff --git a/arch/ppc/xmon/xmon.c b/arch/ppc/xmon/xmon.c deleted file mode 100644 index b1a9174..0000000 --- a/arch/ppc/xmon/xmon.c +++ /dev/null @@ -1,1780 +0,0 @@ -/* - * Routines providing a simple monitor for use on the PowerMac. - * - * Copyright (C) 1996 Paul Mackerras. - */ -#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/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); -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 */ - -#ifdef CONFIG_4xx -#define MSR_SSTEP_ENABLE 0x200 -#else -#define MSR_SSTEP_ENABLE 0x400 -#endif - -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; -} - -static inline void xmon_enable_sstep(struct pt_regs *regs) -{ - regs->msr |= MSR_SSTEP_ENABLE; -#ifdef CONFIG_4xx - mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); -#endif -} - -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; - xmon_enable_sstep(excp); - } else if (at_breakpoint(excp->nip)) { - xmon_trace[smp_processor_id()] = BRSTEP; - xmon_enable_sstep(excp); - } 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; - xmon_enable_sstep(regs); - } 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) || defined(CONFIG_4xx)) - 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) || defined(CONFIG_4xx)) - 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 */ - 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 */ - - -static unsigned short fcstab[256] = { - 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, - 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, - 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, - 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, - 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, - 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, - 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, - 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, - 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, - 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, - 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, - 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, - 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, - 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, - 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, - 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, - 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, - 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, - 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, - 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, - 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, - 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, - 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, - 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, - 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, - 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, - 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, - 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, - 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, - 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, - 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, - 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 -}; - -#define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) - -static void -csum(void) -{ - unsigned int i; - unsigned short fcs; - unsigned char v; - - if (!scanhex(&adrs)) - return; - if (!scanhex(&ncsum)) - return; - fcs = 0xffff; - for (i = 0; i < ncsum; ++i) { - if (mread(adrs+i, &v, 1) == 0) { - printf("csum stopped at %x\n", adrs+i); - break; - } - fcs = FCS(fcs, v); - } - printf("%x\n", fcs); -} - -static void -bpt_cmds(void) -{ - int cmd; - unsigned a; - int mode, i; - struct bpt *bp; - - cmd = inchar(); - switch (cmd) { -#if ! (defined(CONFIG_8xx) || defined(CONFIG_4xx)) - case 'd': - mode = 7; - cmd = inchar(); - if (cmd == 'r') - mode = 5; - else if (cmd == 'w') - mode = 6; - else - termch = cmd; - cmd = inchar(); - if (cmd == 'p') - mode &= ~4; - else - termch = cmd; - dabr.address = 0; - dabr.count = 0; - dabr.enabled = scanhex(&dabr.address); - scanhex(&dabr.count); - if (dabr.enabled) - dabr.address = (dabr.address & ~7) | mode; - break; - case 'i': - cmd = inchar(); - if (cmd == 'p') - mode = 2; - else - mode = 3; - iabr.address = 0; - iabr.count = 0; - iabr.enabled = scanhex(&iabr.address); - if (iabr.enabled) - iabr.address |= mode; - scanhex(&iabr.count); - break; -#endif - case 'c': - if (!scanhex(&a)) { - /* clear all breakpoints */ - for (i = 0; i < NBPTS; ++i) - bpts[i].enabled = 0; - iabr.enabled = 0; - dabr.enabled = 0; - printf("All breakpoints cleared\n"); - } else { - bp = at_breakpoint(a); - if (bp == 0) { - printf("No breakpoint at %x\n", a); - } else { - bp->enabled = 0; - } - } - break; - default: - termch = cmd; - if (!scanhex(&a)) { - /* print all breakpoints */ - printf("type address count\n"); - if (dabr.enabled) { - printf("data %.8x %8x [", dabr.address & ~7, - dabr.count); - if (dabr.address & 1) - printf("r"); - if (dabr.address & 2) - printf("w"); - if (!(dabr.address & 4)) - printf("p"); - printf("]\n"); - } - if (iabr.enabled) - printf("inst %.8x %8x\n", iabr.address & ~3, - iabr.count); - for (bp = bpts; bp < &bpts[NBPTS]; ++bp) - if (bp->enabled) - printf("trap %.8x %8x\n", bp->address, - bp->count); - break; - } - bp = at_breakpoint(a); - if (bp == 0) { - for (bp = bpts; bp < &bpts[NBPTS]; ++bp) - if (!bp->enabled) - break; - if (bp >= &bpts[NBPTS]) { - printf("Sorry, no free breakpoints\n"); - break; - } - } - bp->enabled = 1; - bp->address = a; - bp->count = 0; - scanhex(&bp->count); - break; - } -} - -static void -backtrace(struct pt_regs *excp) -{ - unsigned sp; - unsigned stack[2]; - struct pt_regs regs; - extern char ret_from_except, ret_from_except_full, ret_from_syscall; - - printf("backtrace:\n"); - - if (excp != NULL) - sp = excp->gpr[1]; - else - sp = getsp(); - scanhex(&sp); - scannl(); - for (; sp != 0; sp = stack[0]) { - if (mread(sp, stack, sizeof(stack)) != sizeof(stack)) - break; - printf("[%.8lx] ", stack[0]); - xmon_print_symbol(stack[1], " ", "\n"); - if (stack[1] == (unsigned) &ret_from_except - || stack[1] == (unsigned) &ret_from_except_full - || stack[1] == (unsigned) &ret_from_syscall) { - if (mread(sp+16, ®s, sizeof(regs)) != sizeof(regs)) - break; - printf("exception:%x [%x] %x\n", regs.trap, sp+16, - regs.nip); - sp = regs.gpr[1]; - if (mread(sp, stack, sizeof(stack)) != sizeof(stack)) - break; - } - } -} - -int -getsp(void) -{ - int x; - - asm("mr %0,1" : "=r" (x) :); - return x; -} - -void -excprint(struct pt_regs *fp) -{ - int trap; - -#ifdef CONFIG_SMP - printf("cpu %d: ", smp_processor_id()); -#endif /* CONFIG_SMP */ - printf("vector: %x at pc=", fp->trap); - xmon_print_symbol(fp->nip, ": ", ", lr="); - xmon_print_symbol(fp->link, ": ", "\n"); - printf("msr = %x, sp = %x [%x]\n", fp->msr, fp->gpr[1], fp); - trap = TRAP(fp); - if (trap == 0x300 || trap == 0x600) - printf("dar = %x, dsisr = %x\n", fp->dar, fp->dsisr); - if (current) - printf("current = %x, pid = %d, comm = %s\n", - current, current->pid, current->comm); -} - -void -prregs(struct pt_regs *fp) -{ - int n; - unsigned base; - - if (scanhex(&base)) - fp = (struct pt_regs *) base; - for (n = 0; n < 32; ++n) { - printf("R%.2d = %.8x%s", n, fp->gpr[n], - (n & 3) == 3? "\n": " "); - if (n == 12 && !FULL_REGS(fp)) { - printf("\n"); - break; - } - } - printf("pc = %.8x msr = %.8x lr = %.8x cr = %.8x\n", - fp->nip, fp->msr, fp->link, fp->ccr); - printf("ctr = %.8x xer = %.8x trap = %4x\n", - fp->ctr, fp->xer, fp->trap); -} - -void -cacheflush(void) -{ - int cmd; - unsigned nflush; - - cmd = inchar(); - if (cmd != 'i') - termch = cmd; - scanhex(&adrs); - if (termch != '\n') - termch = 0; - nflush = 1; - scanhex(&nflush); - nflush = (nflush + 31) / 32; - if (cmd != 'i') { - for (; nflush > 0; --nflush, adrs += 0x20) - cflush((void *) adrs); - } else { - for (; nflush > 0; --nflush, adrs += 0x20) - cinval((void *) adrs); - } -} - -unsigned int -read_spr(int n) -{ - unsigned int instrs[2]; - int (*code)(void); - - instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); - instrs[1] = 0x4e800020; - store_inst(instrs); - store_inst(instrs+1); - code = (int (*)(void)) instrs; - return code(); -} - -void -write_spr(int n, unsigned int val) -{ - unsigned int instrs[2]; - int (*code)(unsigned int); - - instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); - instrs[1] = 0x4e800020; - store_inst(instrs); - store_inst(instrs+1); - code = (int (*)(unsigned int)) instrs; - code(val); -} - -static unsigned int regno; -extern char exc_prolog; -extern char dec_exc; - -void -super_regs(void) -{ - int i, cmd; - unsigned val; - - cmd = skipbl(); - if (cmd == '\n') { - printf("msr = %x, pvr = %x\n", get_msr(), get_pvr()); - printf("sprg0-3 = %x %x %x %x\n", get_sprg0(), get_sprg1(), - get_sprg2(), get_sprg3()); - printf("srr0 = %x, srr1 = %x\n", get_srr0(), get_srr1()); -#ifdef CONFIG_PPC_STD_MMU - printf("sr0-15 ="); - for (i = 0; i < 16; ++i) - printf(" %x", get_sr(i)); - printf("\n"); -#endif - asm("mr %0,1" : "=r" (i) :); - printf("sp = %x ", i); - asm("mr %0,2" : "=r" (i) :); - printf("toc = %x\n", i); - return; - } - - scanhex(®no); - switch (cmd) { - case 'w': - val = read_spr(regno); - scanhex(&val); - write_spr(regno, val); - /* fall through */ - case 'r': - printf("spr %x = %x\n", regno, read_spr(regno)); - break; - case 's': - val = get_sr(regno); - scanhex(&val); - set_sr(regno, val); - break; - case 'm': - val = get_msr(); - scanhex(&val); - set_msr(val); - break; - } - scannl(); -} - -#ifndef CONFIG_PPC_STD_MMU -static void -dump_hash_table(void) -{ - printf("This CPU doesn't have a hash table.\n"); -} -#else - -static void -dump_hash_table_seg(unsigned seg, unsigned start, unsigned end) -{ - extern void *Hash; - extern unsigned long Hash_size; - unsigned *htab = Hash; - unsigned hsize = Hash_size; - unsigned v, hmask, va, last_va = 0; - int found, last_found, i; - unsigned *hg, w1, last_w2 = 0, last_va0 = 0; - - last_found = 0; - hmask = hsize / 64 - 1; - va = start; - start = (start >> 12) & 0xffff; - end = (end >> 12) & 0xffff; - for (v = start; v < end; ++v) { - found = 0; - hg = htab + (((v ^ seg) & hmask) * 16); - w1 = 0x80000000 | (seg << 7) | (v >> 10); - for (i = 0; i < 8; ++i, hg += 2) { - if (*hg == w1) { - found = 1; - break; - } - } - if (!found) { - w1 ^= 0x40; - hg = htab + ((~(v ^ seg) & hmask) * 16); - for (i = 0; i < 8; ++i, hg += 2) { - if (*hg == w1) { - found = 1; - break; - } - } - } - if (!(last_found && found && (hg[1] & ~0x180) == last_w2 + 4096)) { - if (last_found) { - if (last_va != last_va0) - printf(" ... %x", last_va); - printf("\n"); - } - if (found) { - printf("%x to %x", va, hg[1]); - last_va0 = va; - } - last_found = found; - } - if (found) { - last_w2 = hg[1] & ~0x180; - last_va = va; - } - va += 4096; - } - if (last_found) - printf(" ... %x\n", last_va); -} - -static unsigned hash_ctx; -static unsigned hash_start; -static unsigned hash_end; - -static void -dump_hash_table(void) -{ - int seg; - unsigned seg_start, seg_end; - - hash_ctx = 0; - hash_start = 0; - hash_end = 0xfffff000; - scanhex(&hash_ctx); - scanhex(&hash_start); - scanhex(&hash_end); - printf("Mappings for context %x\n", hash_ctx); - seg_start = hash_start; - for (seg = hash_start >> 28; seg <= hash_end >> 28; ++seg) { - seg_end = (seg << 28) | 0x0ffff000; - if (seg_end > hash_end) - seg_end = hash_end; - dump_hash_table_seg((hash_ctx << 4) + (seg * 0x111), - seg_start, seg_end); - seg_start = seg_end + 0x1000; - } -} -#endif /* CONFIG_PPC_STD_MMU */ - -/* - * Stuff for reading and writing memory safely - */ - -int -mread(unsigned adrs, void *buf, int size) -{ - volatile int n; - char *p, *q; - - n = 0; - if( setjmp(bus_error_jmp) == 0 ){ - debugger_fault_handler = handle_fault; - sync(); - p = (char *) adrs; - q = (char *) buf; - switch (size) { - case 2: *(short *)q = *(short *)p; break; - case 4: *(int *)q = *(int *)p; break; - default: - for( ; n < size; ++n ) { - *q++ = *p++; - sync(); - } - } - sync(); - /* wait a little while to see if we get a machine check */ - __delay(200); - n = size; - } - debugger_fault_handler = NULL; - return n; -} - -int -mwrite(unsigned adrs, void *buf, int size) -{ - volatile int n; - char *p, *q; - - n = 0; - if( setjmp(bus_error_jmp) == 0 ){ - debugger_fault_handler = handle_fault; - sync(); - p = (char *) adrs; - q = (char *) buf; - switch (size) { - case 2: *(short *)p = *(short *)q; break; - case 4: *(int *)p = *(int *)q; break; - default: - for( ; n < size; ++n ) { - *p++ = *q++; - sync(); - } - } - sync(); - n = size; - } else { - printf("*** Error writing address %x\n", adrs + n); - } - debugger_fault_handler = NULL; - return n; -} - -static int fault_type; -static int fault_except; -static char *fault_chars[] = { "--", "**", "##" }; - -static void -handle_fault(struct pt_regs *regs) -{ - fault_except = TRAP(regs); - fault_type = TRAP(regs) == 0x200? 0: TRAP(regs) == 0x300? 1: 2; - longjmp(bus_error_jmp, 1); -} - -#define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) - -void -byterev(unsigned char *val, int size) -{ - int t; - - switch (size) { - case 2: - SWAP(val[0], val[1], t); - break; - case 4: - SWAP(val[0], val[3], t); - SWAP(val[1], val[2], t); - break; - } -} - -static int brev; -static int mnoread; - -void -memex(void) -{ - int cmd, inc, i, nslash; - unsigned n; - unsigned char val[4]; - - last_cmd = "m\n"; - scanhex(&adrs); - while ((cmd = skipbl()) != '\n') { - switch( cmd ){ - case 'b': size = 1; break; - case 'w': size = 2; break; - case 'l': size = 4; break; - case 'r': brev = !brev; break; - case 'n': mnoread = 1; break; - case '.': mnoread = 0; break; - } - } - if( size <= 0 ) - size = 1; - else if( size > 4 ) - size = 4; - for(;;){ - if (!mnoread) - n = mread(adrs, val, size); - printf("%.8x%c", adrs, brev? 'r': ' '); - if (!mnoread) { - if (brev) - byterev(val, size); - putchar(' '); - for (i = 0; i < n; ++i) - printf("%.2x", val[i]); - for (; i < size; ++i) - printf("%s", fault_chars[fault_type]); - } - putchar(' '); - inc = size; - nslash = 0; - for(;;){ - if( scanhex(&n) ){ - for (i = 0; i < size; ++i) - val[i] = n >> (i * 8); - if (!brev) - byterev(val, size); - mwrite(adrs, val, size); - inc = size; - } - cmd = skipbl(); - if (cmd == '\n') - break; - inc = 0; - switch (cmd) { - case '\'': - for(;;){ - n = inchar(); - if( n == '\\' ) - n = bsesc(); - else if( n == '\'' ) - break; - for (i = 0; i < size; ++i) - val[i] = n >> (i * 8); - if (!brev) - byterev(val, size); - mwrite(adrs, val, size); - adrs += size; - } - adrs -= size; - inc = size; - break; - case ',': - adrs += size; - break; - case '.': - mnoread = 0; - break; - case ';': - break; - case 'x': - case EOF: - scannl(); - return; - case 'b': - case 'v': - size = 1; - break; - case 'w': - size = 2; - break; - case 'l': - size = 4; - break; - case '^': - adrs -= size; - break; - break; - case '/': - if (nslash > 0) - adrs -= 1 << nslash; - else - nslash = 0; - nslash += 4; - adrs += 1 << nslash; - break; - case '\\': - if (nslash < 0) - adrs += 1 << -nslash; - else - nslash = 0; - nslash -= 4; - adrs -= 1 << -nslash; - break; - case 'm': - scanhex(&adrs); - break; - case 'n': - mnoread = 1; - break; - case 'r': - brev = !brev; - break; - case '<': - n = size; - scanhex(&n); - adrs -= n; - break; - case '>': - n = size; - scanhex(&n); - adrs += n; - break; - } - } - adrs += inc; - } -} - -int -bsesc(void) -{ - int c; - - c = inchar(); - switch( c ){ - case 'n': c = '\n'; break; - case 'r': c = '\r'; break; - case 'b': c = '\b'; break; - case 't': c = '\t'; break; - } - return c; -} - -void -dump(void) -{ - int c; - - c = inchar(); - if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n') - termch = c; - scanhex(&adrs); - if( termch != '\n') - termch = 0; - if( c == 'i' ){ - scanhex(&nidump); - if( nidump == 0 ) - nidump = 16; - adrs += ppc_inst_dump(adrs, nidump); - last_cmd = "di\n"; - } else { - scanhex(&ndump); - if( ndump == 0 ) - ndump = 64; - prdump(adrs, ndump); - adrs += ndump; - last_cmd = "d\n"; - } -} - -void -prdump(unsigned adrs, int ndump) -{ - register int n, m, c, r, nr; - unsigned char temp[16]; - - for( n = ndump; n > 0; ){ - printf("%.8x", adrs); - putchar(' '); - r = n < 16? n: 16; - nr = mread(adrs, temp, r); - adrs += nr; - for( m = 0; m < r; ++m ){ - putchar((m & 3) == 0 && m > 0? '.': ' '); - if( m < nr ) - printf("%.2x", temp[m]); - else - printf("%s", fault_chars[fault_type]); - } - for(; m < 16; ++m ) - printf(" "); - printf(" |"); - for( m = 0; m < r; ++m ){ - if( m < nr ){ - c = temp[m]; - putchar(' ' <= c && c <= '~'? c: '.'); - } else - putchar(' '); - } - n -= r; - for(; m < 16; ++m ) - putchar(' '); - printf("|\n"); - if( nr < r ) - break; - } -} - -int -ppc_inst_dump(unsigned adr, int count) -{ - int nr, dotted; - unsigned first_adr; - unsigned long inst, last_inst = 0; - unsigned char val[4]; - - dotted = 0; - for (first_adr = adr; count > 0; --count, adr += 4){ - nr = mread(adr, val, 4); - if( nr == 0 ){ - const char *x = fault_chars[fault_type]; - printf("%.8x %s%s%s%s\n", adr, x, x, x, x); - break; - } - inst = GETWORD(val); - if (adr > first_adr && inst == last_inst) { - if (!dotted) { - printf(" ...\n"); - dotted = 1; - } - continue; - } - dotted = 0; - last_inst = inst; - printf("%.8x ", adr); - printf("%.8x\t", inst); - print_insn_big_powerpc(stdout, inst, adr); /* always returns 4 */ - printf("\n"); - } - return adr - first_adr; -} - -void -print_address(unsigned addr) -{ - printf("0x%x", addr); -} - -/* - * Memory operations - move, set, print differences - */ -static unsigned mdest; /* destination address */ -static unsigned msrc; /* source address */ -static unsigned mval; /* byte value to set memory to */ -static unsigned mcount; /* # bytes to affect */ -static unsigned mdiffs; /* max # differences to print */ - -void -memops(int cmd) -{ - scanhex(&mdest); - if( termch != '\n' ) - termch = 0; - scanhex(cmd == 's'? &mval: &msrc); - if( termch != '\n' ) - termch = 0; - scanhex(&mcount); - switch( cmd ){ - case 'm': - memmove((void *)mdest, (void *)msrc, mcount); - break; - case 's': - memset((void *)mdest, mval, mcount); - break; - case 'd': - if( termch != '\n' ) - termch = 0; - scanhex(&mdiffs); - memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); - break; - } -} - -void -memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) -{ - unsigned n, prt; - - prt = 0; - for( n = nb; n > 0; --n ) - if( *p1++ != *p2++ ) - if( ++prt <= maxpr ) - printf("%.8x %.2x # %.8x %.2x\n", (unsigned)p1 - 1, - p1[-1], (unsigned)p2 - 1, p2[-1]); - if( prt > maxpr ) - printf("Total of %d differences\n", prt); -} - -static unsigned mend; -static unsigned mask; - -void -memlocate(void) -{ - unsigned a, n; - unsigned char val[4]; - - last_cmd = "ml"; - scanhex(&mdest); - if (termch != '\n') { - termch = 0; - scanhex(&mend); - if (termch != '\n') { - termch = 0; - scanhex(&mval); - mask = ~0; - if (termch != '\n') termch = 0; - scanhex(&mask); - } - } - n = 0; - for (a = mdest; a < mend; a += 4) { - if (mread(a, val, 4) == 4 - && ((GETWORD(val) ^ mval) & mask) == 0) { - printf("%.8x: %.8x\n", a, GETWORD(val)); - if (++n >= 10) - break; - } - } -} - -static unsigned mskip = 0x1000; -static unsigned mlim = 0xffffffff; - -void -memzcan(void) -{ - unsigned char v; - unsigned a; - int ok, ook; - - scanhex(&mdest); - if (termch != '\n') termch = 0; - scanhex(&mskip); - if (termch != '\n') termch = 0; - scanhex(&mlim); - ook = 0; - for (a = mdest; a < mlim; a += mskip) { - ok = mread(a, &v, 1); - if (ok && !ook) { - printf("%.8x .. ", a); - fflush(stdout); - } else if (!ok && ook) - printf("%.8x\n", a - mskip); - ook = ok; - if (a + mskip < a) - break; - } - if (ook) - printf("%.8x\n", a - mskip); -} - -void proccall(void) -{ - unsigned int args[8]; - unsigned int ret; - int i; - typedef unsigned int (*callfunc_t)(unsigned int, unsigned int, - unsigned int, unsigned int, unsigned int, - unsigned int, unsigned int, unsigned int); - callfunc_t func; - - scanhex(&adrs); - if (termch != '\n') - termch = 0; - for (i = 0; i < 8; ++i) - args[i] = 0; - for (i = 0; i < 8; ++i) { - if (!scanhex(&args[i]) || termch == '\n') - break; - termch = 0; - } - func = (callfunc_t) adrs; - ret = 0; - if (setjmp(bus_error_jmp) == 0) { - debugger_fault_handler = handle_fault; - sync(); - ret = func(args[0], args[1], args[2], args[3], - args[4], args[5], args[6], args[7]); - sync(); - printf("return value is %x\n", ret); - } else { - printf("*** %x exception occurred\n", fault_except); - } - debugger_fault_handler = NULL; -} - -/* Input scanning routines */ -int -skipbl(void) -{ - int c; - - if( termch != 0 ){ - c = termch; - termch = 0; - } else - c = inchar(); - while( c == ' ' || c == '\t' ) - c = inchar(); - return c; -} - -#define N_PTREGS 44 -static char *regnames[N_PTREGS] = { - "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", - "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", - "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", - "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", - "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", "mq", - "trap", "dar", "dsisr", "res" -}; - -int -scanhex(unsigned *vp) -{ - int c, d; - unsigned v; - - c = skipbl(); - if (c == '%') { - /* parse register name */ - char regname[8]; - int i; - - for (i = 0; i < sizeof(regname) - 1; ++i) { - c = inchar(); - if (!isalnum(c)) { - termch = c; - break; - } - regname[i] = c; - } - regname[i] = 0; - for (i = 0; i < N_PTREGS; ++i) { - if (strcmp(regnames[i], regname) == 0) { - unsigned *rp = (unsigned *) - xmon_regs[smp_processor_id()]; - if (rp == NULL) { - printf("regs not available\n"); - return 0; - } - *vp = rp[i]; - return 1; - } - } - printf("invalid register name '%%%s'\n", regname); - return 0; - } else if (c == '$') { - static char symname[128]; - int i; - for (i=0; i<63; i++) { - c = inchar(); - if (isspace(c)) { - termch = c; - break; - } - symname[i] = c; - } - symname[i++] = 0; - *vp = 0; - if (setjmp(bus_error_jmp) == 0) { - debugger_fault_handler = handle_fault; - sync(); - *vp = kallsyms_lookup_name(symname); - sync(); - } - debugger_fault_handler = NULL; - if (!(*vp)) { - printf("unknown symbol\n"); - return 0; - } - return 1; - } - - d = hexdigit(c); - if( d == EOF ){ - termch = c; - return 0; - } - v = 0; - do { - v = (v << 4) + d; - c = inchar(); - d = hexdigit(c); - } while( d != EOF ); - termch = c; - *vp = v; - return 1; -} - -void -scannl(void) -{ - int c; - - c = termch; - termch = 0; - while( c != '\n' ) - c = inchar(); -} - -int hexdigit(int c) -{ - if( '0' <= c && c <= '9' ) - return c - '0'; - if( 'A' <= c && c <= 'F' ) - return c - ('A' - 10); - if( 'a' <= c && c <= 'f' ) - return c - ('a' - 10); - return EOF; -} - -void -getstring(char *s, int size) -{ - int c; - - c = skipbl(); - do { - if( size > 1 ){ - *s++ = c; - --size; - } - c = inchar(); - } while( c != ' ' && c != '\t' && c != '\n' ); - termch = c; - *s = 0; -} - -static char line[256]; -static char *lineptr; - -void -flush_input(void) -{ - lineptr = NULL; -} - -int -inchar(void) -{ - if (lineptr == NULL || *lineptr == 0) { - if (fgets(line, sizeof(line), stdin) == NULL) { - lineptr = NULL; - return EOF; - } - lineptr = line; - } - return *lineptr++; -} - -void -take_input(char *str) -{ - lineptr = str; -} - -static void -symbol_lookup(void) -{ - int type = inchar(); - unsigned addr; - static char tmp[128]; - - switch (type) { - case 'a': - if (scanhex(&addr)) - xmon_print_symbol(addr, ": ", "\n"); - termch = 0; - break; - case 's': - getstring(tmp, 64); - if (setjmp(bus_error_jmp) == 0) { - debugger_fault_handler = handle_fault; - sync(); - addr = kallsyms_lookup_name(tmp); - if (addr) - printf("%s: %lx\n", tmp, addr); - else - printf("Symbol '%s' not found.\n", tmp); - sync(); - } - debugger_fault_handler = NULL; - termch = 0; - break; - } -} - |
