/*
* 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 char tmpstr[128];
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 symbol_lookup(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\
la lookup symbol+offset of specified address\n\
ls lookup address of specified symbol\n\
m examine/change memory\n\
mm move a block of memory\n\
ms set a block of memory\n\
md compare two blocks of memory\n\
ml locate a block of memory\n\
mz zero a block of memory\n\
mi show information about memory allocation\n\
p 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 1;
}
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 '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 '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)
{
const char *name;
char *modname;
long size, offset;
name = kallsyms_lookup(addr, &size, &offset, &modname, tmpstr);
if (name) {
if (modname)
printf("0x%lx\t# %s:%s+0x%lx", addr, modname, name, offset);
else
printf("0x%lx\t# %s+0x%lx", addr, name, offset);
} else
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;
}
/* skip leading "0x" if any */
if (c == '0') {
c = inchar();
if (c == 'x')
c = inchar();
} else if (c == '$') {
int i;
for (i=0; i<63; i++) {
c = inchar();
if (isspace(c)) {
termch = c;
break;
}
tmpstr[i] = c;
}
tmpstr[i++] = 0;
*vp = kallsyms_lookup_name(tmpstr);
if (!(*vp)) {
printf("unknown symbol '%s'\n", tmpstr);
return 0;
}
return 1;
}
d = hexdigit(c);
if (d == EOF) {
termch = c;
return 0;
}
v = 0;
do {
v = (v << 4) + d;
c = inchar();
d = hexdigit(c);
} while (d != EOF);
termch = c;
*vp = v;
return 1;
}
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;
}
static void
symbol_lookup(void)
{
int type = inchar();
unsigned long addr;
static char tmp[64];
switch (type) {
case 'a':
if (scanhex(&addr)) {
printf("%lx: ", addr);
xmon_print_symbol("%s\n", addr);
}
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 = 0;
termch = 0;
break;
}
}
/* xmon version of __print_symbol */
void __xmon_print_symbol(const char *fmt, unsigned long address)
{
char *modname;
const char *name;
unsigned long offset, size;
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);
} 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();
}
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