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-rw-r--r--arch/ppc/xmon/xmon.c2008
1 files changed, 2008 insertions, 0 deletions
diff --git a/arch/ppc/xmon/xmon.c b/arch/ppc/xmon/xmon.c
new file mode 100644
index 00000000000..8565f49b8b0
--- /dev/null
+++ b/arch/ppc/xmon/xmon.c
@@ -0,0 +1,2008 @@
+/*
+ * 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 <asm/ptrace.h>
+#include <asm/string.h>
+#include <asm/prom.h>
+#include <asm/bootx.h>
+#include <asm/machdep.h>
+#include <asm/xmon.h>
+#ifdef CONFIG_PMAC_BACKLIGHT
+#include <asm/backlight.h>
+#endif
+#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 print_sysmap(void);
+static void sysmap_lookup(void);
+static void remove_bpts(void);
+static void insert_bpts(void);
+static struct bpt *at_breakpoint(unsigned pc);
+static void bpt_cmds(void);
+static void cacheflush(void);
+#ifdef CONFIG_SMP
+static void cpu_cmd(void);
+#endif /* CONFIG_SMP */
+static int pretty_print_addr(unsigned long addr);
+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);
+extern char* xmon_find_symbol(unsigned long addr, unsigned long* saddr);
+extern unsigned long xmon_symbol_to_addr(char* symbol);
+
+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\
+ M print System.map\n\
+ r print registers\n\
+ S print special registers\n\
+ t print backtrace\n\
+ la lookup address in system.map\n\
+ ls lookup symbol in system.map\n\
+ x exit monitor\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");
+}
+
+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;
+}
+
+void
+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" (&regs));
+ 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 = &regs;
+ }
+
+ 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();
+#ifdef CONFIG_PMAC_BACKLIGHT
+ if( setjmp(bus_error_jmp) == 0 ) {
+ debugger_fault_handler = handle_fault;
+ sync();
+ set_backlight_enable(1);
+ set_backlight_level(BACKLIGHT_MAX);
+ sync();
+ }
+ debugger_fault_handler = NULL;
+#endif /* CONFIG_PMAC_BACKLIGHT */
+ 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()]);
+}
+
+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':
+ sysmap_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 'M':
+ print_sysmap();
+ 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;
+ pretty_print_addr(stack[1]);
+ printf(" ");
+ if (stack[1] == (unsigned) &ret_from_except
+ || stack[1] == (unsigned) &ret_from_except_full
+ || stack[1] == (unsigned) &ret_from_syscall) {
+ if (mread(sp+16, &regs, sizeof(regs)) != sizeof(regs))
+ break;
+ printf("\nexception:%x [%x] %x ", regs.trap, sp+16,
+ regs.nip);
+ sp = regs.gpr[1];
+ if (mread(sp, stack, sizeof(stack)) != sizeof(stack))
+ break;
+ }
+ printf("\n");
+ }
+}
+
+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);
+ pretty_print_addr(fp->nip);
+ printf(", lr = ");
+ pretty_print_addr(fp->link);
+ printf("\nmsr = %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
+print_sysmap(void)
+{
+ extern char *sysmap;
+ if ( sysmap ) {
+ printf("System.map: \n");
+ if( setjmp(bus_error_jmp) == 0 ) {
+ debugger_fault_handler = handle_fault;
+ sync();
+ xmon_puts(sysmap);
+ sync();
+ }
+ debugger_fault_handler = NULL;
+ }
+ else
+ printf("No System.map\n");
+}
+
+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(&regno);
+ 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[64];
+ int i;
+ for (i=0; i<63; i++) {
+ c = inchar();
+ if (isspace(c)) {
+ termch = c;
+ break;
+ }
+ symname[i] = c;
+ }
+ symname[i++] = 0;
+ *vp = xmon_symbol_to_addr(symname);
+ 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;
+}
+
+void
+sysmap_lookup(void)
+{
+ int type = inchar();
+ unsigned addr;
+ static char tmp[64];
+ char* cur;
+
+ extern char *sysmap;
+ extern unsigned long sysmap_size;
+ if ( !sysmap || !sysmap_size )
+ return;
+
+ switch(type) {
+ case 'a':
+ if (scanhex(&addr)) {
+ pretty_print_addr(addr);
+ printf("\n");
+ }
+ termch = 0;
+ break;
+ case 's':
+ getstring(tmp, 64);
+ if( setjmp(bus_error_jmp) == 0 ) {
+ debugger_fault_handler = handle_fault;
+ sync();
+ cur = sysmap;
+ do {
+ cur = strstr(cur, tmp);
+ if (cur) {
+ static char res[64];
+ char *p, *d;
+ p = cur;
+ while(p > sysmap && *p != 10)
+ p--;
+ if (*p == 10) p++;
+ d = res;
+ while(*p && p < (sysmap + sysmap_size) && *p != 10)
+ *(d++) = *(p++);
+ *(d++) = 0;
+ printf("%s\n", res);
+ cur++;
+ }
+ } while (cur);
+ sync();
+ }
+ debugger_fault_handler = NULL;
+ termch = 0;
+ break;
+ }
+}
+
+static int
+pretty_print_addr(unsigned long addr)
+{
+ char *sym;
+ unsigned long saddr;
+
+ printf("%08x", addr);
+ sym = xmon_find_symbol(addr, &saddr);
+ if (sym)
+ printf(" (%s+0x%x)", sym, addr-saddr);
+ return (sym != 0);
+}
+
+char*
+xmon_find_symbol(unsigned long addr, unsigned long* saddr)
+{
+ static char rbuffer[64];
+ char *p, *ep, *limit;
+ unsigned long prev, next;
+ char* psym;
+
+ extern char *sysmap;
+ extern unsigned long sysmap_size;
+ if ( !sysmap || !sysmap_size )
+ return NULL;
+
+ prev = 0;
+ psym = NULL;
+ p = sysmap;
+ limit = p + sysmap_size;
+ if( setjmp(bus_error_jmp) == 0 ) {
+ debugger_fault_handler = handle_fault;
+ sync();
+ do {
+ next = simple_strtoul(p, &p, 16);
+ if (next > addr && prev <= addr) {
+ if (!psym)
+ goto bail;
+ ep = rbuffer;
+ p = psym;
+ while(*p && p < limit && *p == 32)
+ p++;
+ while(*p && p < limit && *p != 10 && (ep - rbuffer) < 63)
+ *(ep++) = *(p++);
+ *(ep++) = 0;
+ if (saddr)
+ *saddr = prev;
+ debugger_fault_handler = NULL;
+ return rbuffer;
+ }
+ prev = next;
+ psym = p;
+ while(*p && p < limit && *p != 10)
+ p++;
+ if (*p) p++;
+ } while(*p && p < limit && next);
+bail:
+ sync();
+ }
+ debugger_fault_handler = NULL;
+ return NULL;
+}
+
+unsigned long
+xmon_symbol_to_addr(char* symbol)
+{
+ char *p, *cur;
+ char *match = NULL;
+ int goodness = 0;
+ int result = 0;
+
+ extern char *sysmap;
+ extern unsigned long sysmap_size;
+ if ( !sysmap || !sysmap_size )
+ return 0;
+
+ if( setjmp(bus_error_jmp) == 0 ) {
+ debugger_fault_handler = handle_fault;
+ sync();
+ cur = sysmap;
+ while(cur) {
+ cur = strstr(cur, symbol);
+ if (cur) {
+ int gd = 1;
+
+ /* best match if equal, better match if
+ * begins with
+ */
+ if (cur == sysmap || *(cur-1) == ' ') {
+ gd++;
+ if (cur[strlen(symbol)] == 10)
+ gd++;
+ }
+ if (gd > goodness) {
+ match = cur;
+ goodness = gd;
+ if (gd == 3)
+ break;
+ }
+ cur++;
+ }
+ }
+ if (goodness) {
+ p = match;
+ while(p > sysmap && *p != 10)
+ p--;
+ if (*p == 10) p++;
+ result = simple_strtoul(p, &p, 16);
+ }
+ sync();
+ }
+ debugger_fault_handler = NULL;
+ return result;
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-27 10:43:22 +0000