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Commit 57014e07 authored by Anton Blanchard's avatar Anton Blanchard
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ppc64: use generic debugger hooks instead of hardwiring xmon 

	everywhere
ppc64: create CONFIG_XMON_DEFAULT so we can have debugging enabled
	but xmon disabled at boot.
parent f8469e97
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Showing with 68 additions and 858 deletions
arch/ppc64/config.in
View file @ 57014e07
......@@ -5,7 +5,6 @@
define_bool CONFIG_UID16 n
define_bool CONFIG_RWSEM_GENERIC_SPINLOCK n
define_bool CONFIG_RWSEM_XCHGADD_ALGORITHM y
define_bool CONFIG_GENERIC_BUST_SPINLOCK n
define_bool CONFIG_GENERIC_ISA_DMA y
define_bool CONFIG_HAVE_DEC_LOCK y
......@@ -30,8 +29,6 @@ define_bool CONFIG_PREEMPT n
if [ "$CONFIG_PPC_ISERIES" = "y" ]; then
define_bool CONFIG_MSCHUNKS y
else
bool 'MsChunks Physical to Absolute address translation support' CONFIG_MSCHUNKS
fi
endmenu
......@@ -206,10 +203,16 @@ source net/bluetooth/Config.in
mainmenu_option next_comment
comment 'Kernel hacking'
bool 'Magic SysRq key' CONFIG_MAGIC_SYSRQ
bool 'Include kgdb kernel debugger' CONFIG_KGDB
bool 'Include xmon kernel debugger' CONFIG_XMON
bool 'Include PPCDBG realtime debugging' CONFIG_PPCDBG
bool 'Kernel debugging' CONFIG_DEBUG_KERNEL
if [ "$CONFIG_DEBUG_KERNEL" != "n" ]; then
bool ' Debug memory allocations' CONFIG_DEBUG_SLAB
bool ' Magic SysRq key' CONFIG_MAGIC_SYSRQ
bool ' Include xmon kernel debugger' CONFIG_XMON
if [ "$CONFIG_XMON" = "y" ]; then
bool ' Enable xmon by default' CONFIG_XMON_DEFAULT
fi
bool ' Include PPCDBG realtime debugging' CONFIG_PPCDBG
fi
endmenu
source lib/Config.in
arch/ppc64/kernel/Makefile
View file @ 57014e07
......@@ -40,8 +40,6 @@ obj-$(CONFIG_PCI) += pSeries_pci.o pSeries_lpar.o pSeries_hvCall.o eeh.o
obj-y += rtasd.o nvram.o
endif
obj-$(CONFIG_KGDB) += ppc-stub.o
obj-$(CONFIG_SMP) += smp.o
obj-y += prom.o lmb.o rtas.o rtas-proc.o chrp_setup.o i8259.o
......
arch/ppc64/kernel/irq.c
View file @ 57014e07
......@@ -75,22 +75,6 @@ irq_desc_t irq_desc[NR_IRQS] __cacheline_aligned =
int ppc_spurious_interrupts = 0;
struct irqaction *ppc_irq_action[NR_IRQS];
unsigned long lpEvent_count = 0;
#ifdef CONFIG_XMON
extern void xmon(struct pt_regs *regs);
extern int xmon_bpt(struct pt_regs *regs);
extern int xmon_sstep(struct pt_regs *regs);
extern int xmon_iabr_match(struct pt_regs *regs);
extern int xmon_dabr_match(struct pt_regs *regs);
extern void (*xmon_fault_handler)(struct pt_regs *regs);
#endif
#ifdef CONFIG_XMON
extern void (*debugger)(struct pt_regs *regs);
extern int (*debugger_bpt)(struct pt_regs *regs);
extern int (*debugger_sstep)(struct pt_regs *regs);
extern int (*debugger_iabr_match)(struct pt_regs *regs);
extern int (*debugger_dabr_match)(struct pt_regs *regs);
extern void (*debugger_fault_handler)(struct pt_regs *regs);
#endif
/* nasty hack for shared irq's since we need to do kmalloc calls but
* can't very early in the boot when we need to do a request irq.
......
arch/ppc64/kernel/ppc-stub.c deleted 100644 → 0
View file @ f8469e97
/*
* ppc-stub.c: KGDB support for the Linux kernel.
*
* adapted from arch/sparc/kernel/sparc-stub.c for the PowerPC
* some stuff borrowed from Paul Mackerras' xmon
* Copyright (C) 1998 Michael AK Tesch (tesch@cs.wisc.edu)
*
* Modifications to run under Linux
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
*
* This file originally came from the gdb sources, and the
* copyright notices have been retained below.
*/
/****************************************************************************
THIS SOFTWARE IS NOT COPYRIGHTED
HP offers the following for use in the public domain. HP makes no
warranty with regard to the software or its performance and the
user accepts the software "AS IS" with all faults.
HP DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD
TO THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
****************************************************************************/
/****************************************************************************
* Header: remcom.c,v 1.34 91/03/09 12:29:49 glenne Exp $
*
* Module name: remcom.c $
* Revision: 1.34 $
* Date: 91/03/09 12:29:49 $
* Contributor: Lake Stevens Instrument Division$
*
* Description: low level support for gdb debugger. $
*
* Considerations: only works on target hardware $
*
* Written by: Glenn Engel $
* ModuleState: Experimental $
*
* NOTES: See Below $
*
* Modified for SPARC by Stu Grossman, Cygnus Support.
*
* This code has been extensively tested on the Fujitsu SPARClite demo board.
*
* To enable debugger support, two things need to happen. One, a
* call to set_debug_traps() is necessary in order to allow any breakpoints
* or error conditions to be properly intercepted and reported to gdb.
* Two, a breakpoint needs to be generated to begin communication. This
* is most easily accomplished by a call to breakpoint(). Breakpoint()
* simulates a breakpoint by executing a trap #1.
*
*************
*
* The following gdb commands are supported:
*
* command function Return value
*
* g return the value of the CPU registers hex data or ENN
* G set the value of the CPU registers OK or ENN
* qOffsets Get section offsets. Reply is Text=xxx;Data=yyy;Bss=zzz
*
* mAA..AA,LLLL Read LLLL bytes at address AA..AA hex data or ENN
* MAA..AA,LLLL: Write LLLL bytes at address AA.AA OK or ENN
*
* c Resume at current address SNN ( signal NN)
* cAA..AA Continue at address AA..AA SNN
*
* s Step one instruction SNN
* sAA..AA Step one instruction from AA..AA SNN
*
* k kill
*
* ? What was the last sigval ? SNN (signal NN)
*
* bBB..BB Set baud rate to BB..BB OK or BNN, then sets
* baud rate
*
* All commands and responses are sent with a packet which includes a
* checksum. A packet consists of
*
* $<packet info>#<checksum>.
*
* where
* <packet info> :: <characters representing the command or response>
* <checksum> :: <two hex digits computed as modulo 256 sum of <packetinfo>>
*
* When a packet is received, it is first acknowledged with either '+' or '-'.
* '+' indicates a successful transfer. '-' indicates a failed transfer.
*
* Example:
*
* Host: Reply:
* $m0,10#2a +$00010203040506070809101112131415#42
*
****************************************************************************/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <asm/system.h>
#include <asm/signal.h>
#include <asm/kgdb.h>
#include <asm/pgtable.h>
#include <asm/ptrace.h>
void breakinst(void);
/*
* BUFMAX defines the maximum number of characters in inbound/outbound buffers
* at least NUMREGBYTES*2 are needed for register packets
*/
#define BUFMAX 2048
static char remcomInBuffer[BUFMAX];
static char remcomOutBuffer[BUFMAX];
static int initialized = 0;
static int kgdb_active = 0;
static int kgdb_started = 0;
static u_int fault_jmp_buf[100];
static int kdebug;
static const char hexchars[]="0123456789abcdef";
/* Place where we save old trap entries for restoration - sparc*/
/* struct tt_entry kgdb_savettable[256]; */
/* typedef void (*trapfunc_t)(void); */
#if 0
/* Install an exception handler for kgdb */
static void exceptionHandler(int tnum, unsigned int *tfunc)
{
/* We are dorking with a live trap table, all irqs off */
}
#endif
int
kgdb_setjmp(long *buf)
{
asm ("mflr 0; stw 0,0(%0);"
"stw 1,4(%0); stw 2,8(%0);"
"mfcr 0; stw 0,12(%0);"
"stmw 13,16(%0)"
: : "r" (buf));
/* XXX should save fp regs as well */
return 0;
}
void
kgdb_longjmp(long *buf, int val)
{
if (val == 0)
val = 1;
asm ("lmw 13,16(%0);"
"lwz 0,12(%0); mtcrf 0x38,0;"
"lwz 0,0(%0); lwz 1,4(%0); lwz 2,8(%0);"
"mtlr 0; mr 3,%1"
: : "r" (buf), "r" (val));
}
/* Convert ch from a hex digit to an int */
static int
hex(unsigned char ch)
{
if (ch >= 'a' && ch <= 'f')
return ch-'a'+10;
if (ch >= '0' && ch <= '9')
return ch-'0';
if (ch >= 'A' && ch <= 'F')
return ch-'A'+10;
return -1;
}
/* Convert the memory pointed to by mem into hex, placing result in buf.
* Return a pointer to the last char put in buf (null), in case of mem fault,
* return 0.
*/
static unsigned char *
mem2hex(char *mem, char *buf, int count)
{
unsigned char ch;
if (kgdb_setjmp((long*)fault_jmp_buf) == 0) {
debugger_fault_handler = kgdb_fault_handler;
while (count-- > 0) {
ch = *mem++;
*buf++ = hexchars[ch >> 4];
*buf++ = hexchars[ch & 0xf];
}
} else {
/* error condition */
}
debugger_fault_handler = 0;
*buf = 0;
return buf;
}
/* convert the hex array pointed to by buf into binary to be placed in mem
* return a pointer to the character AFTER the last byte written.
*/
static char *
hex2mem(char *buf, char *mem, int count)
{
int i;
unsigned char ch;
if (kgdb_setjmp((long*)fault_jmp_buf) == 0) {
debugger_fault_handler = kgdb_fault_handler;
for (i=0; i<count; i++) {
ch = hex(*buf++) << 4;
ch |= hex(*buf++);
*mem++ = ch;
}
flush_icache_range((int)mem, (int)mem+count);
} else {
/* error condition */
}
debugger_fault_handler = 0;
return mem;
}
/*
* While we find nice hex chars, build an int.
* Return number of chars processed.
*/
static int
hexToInt(char **ptr, int *intValue)
{
int numChars = 0;
int hexValue;
*intValue = 0;
if (kgdb_setjmp((long*)fault_jmp_buf) == 0) {
debugger_fault_handler = kgdb_fault_handler;
while (**ptr) {
hexValue = hex(**ptr);
if (hexValue < 0)
break;
*intValue = (*intValue << 4) | hexValue;
numChars ++;
(*ptr)++;
}
} else {
/* error condition */
}
debugger_fault_handler = 0;
return (numChars);
}
/* scan for the sequence $<data>#<checksum> */
static void
getpacket(char *buffer)
{
unsigned char checksum;
unsigned char xmitcsum;
int i;
int count;
unsigned char ch;
do {
/* wait around for the start character, ignore all other
* characters */
while ((ch = (getDebugChar() & 0x7f)) != '$') ;
checksum = 0;
xmitcsum = -1;
count = 0;
/* now, read until a # or end of buffer is found */
while (count < BUFMAX) {
ch = getDebugChar() & 0x7f;
if (ch == '#')
break;
checksum = checksum + ch;
buffer[count] = ch;
count = count + 1;
}
if (count >= BUFMAX)
continue;
buffer[count] = 0;
if (ch == '#') {
xmitcsum = hex(getDebugChar() & 0x7f) << 4;
xmitcsum |= hex(getDebugChar() & 0x7f);
if (checksum != xmitcsum)
putDebugChar('-'); /* failed checksum */
else {
putDebugChar('+'); /* successful transfer */
/* if a sequence char is present, reply the ID */
if (buffer[2] == ':') {
putDebugChar(buffer[0]);
putDebugChar(buffer[1]);
/* remove sequence chars from buffer */
count = strlen(buffer);
for (i=3; i <= count; i++)
buffer[i-3] = buffer[i];
}
}
}
} while (checksum != xmitcsum);
}
/* send the packet in buffer. */
static void putpacket(unsigned char *buffer)
{
unsigned char checksum;
int count;
unsigned char ch, recv;
/* $<packet info>#<checksum>. */
do {
putDebugChar('$');
checksum = 0;
count = 0;
while ((ch = buffer[count])) {
putDebugChar(ch);
checksum += ch;
count += 1;
}
putDebugChar('#');
putDebugChar(hexchars[checksum >> 4]);
putDebugChar(hexchars[checksum & 0xf]);
recv = getDebugChar();
} while ((recv & 0x7f) != '+');
}
static void kgdb_flush_cache_all(void)
{
flush_instruction_cache();
}
/* Set up exception handlers for tracing and breakpoints
* [could be called kgdb_init()]
*/
void set_debug_traps(void)
{
#if 0
unsigned char c;
save_and_cli(flags);
/* In case GDB is started before us, ack any packets (presumably
* "$?#xx") sitting there.
*
* I've found this code causes more problems than it solves,
* so that's why it's commented out. GDB seems to work fine
* now starting either before or after the kernel -bwb
*/
while((c = getDebugChar()) != '$');
while((c = getDebugChar()) != '#');
c = getDebugChar(); /* eat first csum byte */
c = getDebugChar(); /* eat second csum byte */
putDebugChar('+'); /* ack it */
#endif
debugger = kgdb;
debugger_bpt = kgdb_bpt;
debugger_sstep = kgdb_sstep;
debugger_iabr_match = kgdb_iabr_match;
debugger_dabr_match = kgdb_dabr_match;
initialized = 1;
}
static void kgdb_fault_handler(struct pt_regs *regs)
{
kgdb_longjmp((long*)fault_jmp_buf, 1);
}
int kgdb_bpt(struct pt_regs *regs)
{
handle_exception(regs);
return 1;
}
int kgdb_sstep(struct pt_regs *regs)
{
handle_exception(regs);
return 1;
}
void kgdb(struct pt_regs *regs)
{
handle_exception(regs);
}
int kgdb_iabr_match(struct pt_regs *regs)
{
printk("kgdb doesn't support iabr, what?!?\n");
handle_exception(regs);
return 1;
}
int kgdb_dabr_match(struct pt_regs *regs)
{
printk("kgdb doesn't support dabr, what?!?\n");
handle_exception(regs);
return 1;
}
/* Convert the SPARC hardware trap type code to a unix signal number. */
/*
* This table contains the mapping between PowerPC hardware trap types, and
* signals, which are primarily what GDB understands.
*/
static struct hard_trap_info
{
unsigned int tt; /* Trap type code for powerpc */
unsigned char signo; /* Signal that we map this trap into */
} hard_trap_info[] = {
{ 0x200, SIGSEGV }, /* machine check */
{ 0x300, SIGSEGV }, /* address error (store) */
{ 0x400, SIGBUS }, /* instruction bus error */
{ 0x500, SIGINT }, /* interrupt */
{ 0x600, SIGBUS }, /* alingment */
{ 0x700, SIGTRAP }, /* breakpoint trap */
{ 0x800, SIGFPE }, /* fpu unavail */
{ 0x900, SIGALRM }, /* decrementer */
{ 0xa00, SIGILL }, /* reserved */
{ 0xb00, SIGILL }, /* reserved */
{ 0xc00, SIGCHLD }, /* syscall */
{ 0xd00, SIGTRAP }, /* single-step/watch */
{ 0xe00, SIGFPE }, /* fp assist */
{ 0, 0} /* Must be last */
};
static int computeSignal(unsigned int tt)
{
struct hard_trap_info *ht;
for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
if (ht->tt == tt)
return ht->signo;
return SIGHUP; /* default for things we don't know about */
}
#define PC_REGNUM 64
#define SP_REGNUM 1
/*
* This function does all command processing for interfacing to gdb.
*/
static void
handle_exception (struct pt_regs *regs)
{
int sigval;
int addr;
int length;
char *ptr;
unsigned long msr;
if (debugger_fault_handler) {
debugger_fault_handler(regs);
panic("kgdb longjump failed!\n");
}
if (kgdb_active) {
printk("interrupt while in kgdb, returning\n");
return;
}
kgdb_active = 1;
kgdb_started = 1;
#ifdef KGDB_DEBUG
printk("kgdb: entering handle_exception; trap [0x%x]\n",
(unsigned int)regs->trap);
#endif
kgdb_interruptible(0);
lock_kernel();
msr = get_msr();
set_msr(msr & ~MSR_EE); /* disable interrupts */
if (regs->nip == (unsigned long)breakinst) {
/* Skip over breakpoint trap insn */
regs->nip += 4;
}
/* reply to host that an exception has occurred */
sigval = computeSignal(regs->trap);
ptr = remcomOutBuffer;
#if 0
*ptr++ = 'S';
*ptr++ = hexchars[sigval >> 4];
*ptr++ = hexchars[sigval & 0xf];
#else
*ptr++ = 'T';
*ptr++ = hexchars[sigval >> 4];
*ptr++ = hexchars[sigval & 0xf];
*ptr++ = hexchars[PC_REGNUM >> 4];
*ptr++ = hexchars[PC_REGNUM & 0xf];
*ptr++ = ':';
ptr = mem2hex((char *)&regs->nip, ptr, 4);
*ptr++ = ';';
*ptr++ = hexchars[SP_REGNUM >> 4];
*ptr++ = hexchars[SP_REGNUM & 0xf];
*ptr++ = ':';
ptr = mem2hex(((char *)&regs) + SP_REGNUM*4, ptr, 4);
*ptr++ = ';';
#endif
*ptr++ = 0;
putpacket(remcomOutBuffer);
/* XXX We may want to add some features dealing with poking the
* XXX page tables, ... (look at sparc-stub.c for more info)
* XXX also required hacking to the gdb sources directly...
*/
while (1) {
remcomOutBuffer[0] = 0;
getpacket(remcomInBuffer);
switch (remcomInBuffer[0]) {
case '?': /* report most recent signal */
remcomOutBuffer[0] = 'S';
remcomOutBuffer[1] = hexchars[sigval >> 4];
remcomOutBuffer[2] = hexchars[sigval & 0xf];
remcomOutBuffer[3] = 0;
break;
#if 0
case 'q': /* this screws up gdb for some reason...*/
{
extern long _start, sdata, __bss_start;
ptr = &remcomInBuffer[1];
if (strncmp(ptr, "Offsets", 7) != 0)
break;
ptr = remcomOutBuffer;
sprintf(ptr, "Text=%8.8x;Data=%8.8x;Bss=%8.8x",
&_start, &sdata, &__bss_start);
break;
}
#endif
case 'd':
/* toggle debug flag */
kdebug ^= 1;
break;
case 'g': /* return the value of the CPU registers.
* some of them are non-PowerPC names :(
* they are stored in gdb like:
* struct {
* u32 gpr[32];
* f64 fpr[32];
* u32 pc, ps, cnd, lr; (ps=msr)
* u32 cnt, xer, mq;
* }
*/
{
int i;
ptr = remcomOutBuffer;
/* General Purpose Regs */
ptr = mem2hex((char *)regs, ptr, 32 * 4);
/* Floating Point Regs - FIXME */
/*ptr = mem2hex((char *), ptr, 32 * 8);*/
for(i=0; i<(32*8*2); i++) { /* 2chars/byte */
ptr[i] = '0';
}
ptr += 32*8*2;
/* pc, msr, cr, lr, ctr, xer, (mq is unused) */
ptr = mem2hex((char *)&regs->nip, ptr, 4);
ptr = mem2hex((char *)&regs->msr, ptr, 4);
ptr = mem2hex((char *)&regs->ccr, ptr, 4);
ptr = mem2hex((char *)&regs->link, ptr, 4);
ptr = mem2hex((char *)&regs->ctr, ptr, 4);
ptr = mem2hex((char *)&regs->xer, ptr, 4);
}
break;
case 'G': /* set the value of the CPU registers */
{
ptr = &remcomInBuffer[1];
/*
* If the stack pointer has moved, you should pray.
* (cause only god can help you).
*/
/* General Purpose Regs */
hex2mem(ptr, (char *)regs, 32 * 4);
/* Floating Point Regs - FIXME?? */
/*ptr = hex2mem(ptr, ??, 32 * 8);*/
ptr += 32*8*2;
/* pc, msr, cr, lr, ctr, xer, (mq is unused) */
ptr = hex2mem(ptr, (char *)&regs->nip, 4);
ptr = hex2mem(ptr, (char *)&regs->msr, 4);
ptr = hex2mem(ptr, (char *)&regs->ccr, 4);
ptr = hex2mem(ptr, (char *)&regs->link, 4);
ptr = hex2mem(ptr, (char *)&regs->ctr, 4);
ptr = hex2mem(ptr, (char *)&regs->xer, 4);
strcpy(remcomOutBuffer,"OK");
}
break;
case 'H':
/* don't do anything, yet, just acknowledge */
hexToInt(&ptr, &addr);
strcpy(remcomOutBuffer,"OK");
break;
case 'm': /* mAA..AA,LLLL Read LLLL bytes at address AA..AA */
/* Try to read %x,%x. */
ptr = &remcomInBuffer[1];
if (hexToInt(&ptr, &addr)
&& *ptr++ == ','
&& hexToInt(&ptr, &length)) {
if (mem2hex((char *)addr, remcomOutBuffer,length))
break;
strcpy (remcomOutBuffer, "E03");
} else {
strcpy(remcomOutBuffer,"E01");
}
break;
case 'M': /* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */
/* Try to read '%x,%x:'. */
ptr = &remcomInBuffer[1];
if (hexToInt(&ptr, &addr)
&& *ptr++ == ','
&& hexToInt(&ptr, &length)
&& *ptr++ == ':') {
if (hex2mem(ptr, (char *)addr, length)) {
strcpy(remcomOutBuffer, "OK");
} else {
strcpy(remcomOutBuffer, "E03");
}
flush_icache_range(addr, addr+length);
} else {
strcpy(remcomOutBuffer, "E02");
}
break;
case 'k': /* kill the program, actually just continue */
case 'c': /* cAA..AA Continue; address AA..AA optional */
/* try to read optional parameter, pc unchanged if no parm */
ptr = &remcomInBuffer[1];
if (hexToInt(&ptr, &addr)) {
regs->nip = addr;
}
/* Need to flush the instruction cache here, as we may have deposited a
* breakpoint, and the icache probably has no way of knowing that a data ref to
* some location may have changed something that is in the instruction cache.
*/
kgdb_flush_cache_all();
set_msr(msr);
kgdb_interruptible(1);
unlock_kernel();
kgdb_active = 0;
return;
case 's':
kgdb_flush_cache_all();
regs->msr |= MSR_SE;
#if 0
set_msr(msr | MSR_SE);
#endif
unlock_kernel();
kgdb_active = 0;
return;
case 'r': /* Reset (if user process..exit ???)*/
panic("kgdb reset.");
break;
} /* switch */
if (remcomOutBuffer[0] && kdebug) {
printk("remcomInBuffer: %s\n", remcomInBuffer);
printk("remcomOutBuffer: %s\n", remcomOutBuffer);
}
/* reply to the request */
putpacket(remcomOutBuffer);
} /* while(1) */
}
/* This function will generate a breakpoint exception. It is used at the
beginning of a program to sync up with a debugger and can be used
otherwise as a quick means to stop program execution and "break" into
the debugger. */
void
breakpoint(void)
{
if (!initialized) {
printk("breakpoint() called b4 kgdb init\n");
return;
}
asm(" .globl breakinst
breakinst: .long 0x7d821008
");
}
/* Output string in GDB O-packet format if GDB has connected. If nothing
output, returns 0 (caller must then handle output). */
int
kgdb_output_string (const char* s, unsigned int count)
{
char buffer[512];
if (!kgdb_started)
return 0;
count = (count <= (sizeof(buffer) / 2 - 2))
? count : (sizeof(buffer) / 2 - 2);
buffer[0] = 'O';
mem2hex (s, &buffer[1], count);
putpacket(buffer);
return 1;
}
arch/ppc64/kernel/ppc_ksyms.c
View file @ 57014e07
......@@ -257,7 +257,7 @@ EXPORT_SYMBOL(console_drivers);
EXPORT_SYMBOL(xmon);
#endif
#if defined(CONFIG_KGDB) || defined(CONFIG_XMON)
#ifdef CONFIG_DEBUG_KERNEL
extern void (*debugger)(struct pt_regs *regs);
extern int (*debugger_bpt)(struct pt_regs *regs);
extern int (*debugger_sstep)(struct pt_regs *regs);
......
arch/ppc64/kernel/setup.c
View file @ 57014e07
......@@ -130,6 +130,14 @@ void setup_system(unsigned long r3, unsigned long r4, unsigned long r5,
/* This should be fixed properly in kernel/resource.c */
iomem_resource.end = MEM_SPACE_LIMIT;
#ifdef CONFIG_XMON_DEFAULT
debugger = xmon;
debugger_bpt = xmon_bpt;
debugger_sstep = xmon_sstep;
debugger_iabr_match = xmon_iabr_match;
debugger_dabr_match = xmon_dabr_match;
#endif
/* pSeries systems are identified in prom.c via OF. */
if ( itLpNaca.xLparInstalled == 1 )
naca->platform = PLATFORM_ISERIES_LPAR;
......@@ -507,11 +515,6 @@ void __init setup_arch(char **cmdline_p)
ppc_md.progress("setup_arch:enter", 0x3eab);
#if defined(CONFIG_KGDB)
kgdb_map_scc();
set_debug_traps();
breakpoint();
#endif
/*
* Set cache line size based on type of cpu as a default.
* Systems with OF can look in the properties on the cpu node(s)
......@@ -543,26 +546,6 @@ void __init setup_arch(char **cmdline_p)
ppc_md.progress("setup_arch: exit", 0x3eab);
}
void exception_trace(unsigned long trap)
{
unsigned long x, srr0, srr1, reg20, reg1, reg21;
asm("mflr %0" : "=r" (x) :);
asm("mfspr %0,0x1a" : "=r" (srr0) :);
asm("mfspr %0,0x1b" : "=r" (srr1) :);
asm("mr %0,1" : "=r" (reg1) :);
asm("mr %0,20" : "=r" (reg20) :);
asm("mr %0,21" : "=r" (reg21) :);
udbg_puts("\n");
udbg_puts("Took an exception : "); udbg_puthex(x); udbg_puts("\n");
udbg_puts(" "); udbg_puthex(reg1); udbg_puts("\n");
udbg_puts(" "); udbg_puthex(reg20); udbg_puts("\n");
udbg_puts(" "); udbg_puthex(reg21); udbg_puts("\n");
udbg_puts(" "); udbg_puthex(srr0); udbg_puts("\n");
udbg_puts(" "); udbg_puthex(srr1); udbg_puts("\n");
}
int set_spread_lpevents( char * str )
{
/* The parameter is the number of processors to share in processing lp events */
......
arch/ppc64/kernel/traps.c
View file @ 57014e07
......@@ -38,31 +38,12 @@
#include <asm/ppcdebug.h>
extern int fix_alignment(struct pt_regs *);
extern void bad_page_fault(struct pt_regs *, unsigned long);
extern void bad_page_fault(struct pt_regs *, unsigned long, int);
/* This is true if we are using the firmware NMI handler (typically LPAR) */
extern int fwnmi_active;
#ifdef CONFIG_XMON
extern void xmon(struct pt_regs *regs);
extern int xmon_bpt(struct pt_regs *regs);
extern int xmon_sstep(struct pt_regs *regs);
extern int xmon_iabr_match(struct pt_regs *regs);
extern int xmon_dabr_match(struct pt_regs *regs);
extern void (*xmon_fault_handler)(struct pt_regs *regs);
#endif
#ifdef CONFIG_XMON
#define CONFIG_DEBUGGER
void (*debugger)(struct pt_regs *regs) = xmon;
int (*debugger_bpt)(struct pt_regs *regs) = xmon_bpt;
int (*debugger_sstep)(struct pt_regs *regs) = xmon_sstep;
int (*debugger_iabr_match)(struct pt_regs *regs) = xmon_iabr_match;
int (*debugger_dabr_match)(struct pt_regs *regs) = xmon_dabr_match;
void (*debugger_fault_handler)(struct pt_regs *regs);
#else
#ifdef CONFIG_KGDB
#define CONFIG_DEBUGGER
#ifdef CONFIG_DEBUG_KERNEL
void (*debugger)(struct pt_regs *regs);
int (*debugger_bpt)(struct pt_regs *regs);
int (*debugger_sstep)(struct pt_regs *regs);
......@@ -70,7 +51,6 @@ int (*debugger_iabr_match)(struct pt_regs *regs);
int (*debugger_dabr_match)(struct pt_regs *regs);
void (*debugger_fault_handler)(struct pt_regs *regs);
#endif
#endif
/*
* Trap & Exception support
......@@ -103,10 +83,8 @@ static void
_exception(int signr, siginfo_t *info, struct pt_regs *regs)
{
if (!user_mode(regs)) {
#ifdef CONFIG_DEBUGGER
if (debugger)
debugger(regs);
#endif
die("Exception in kernel mode\n", regs, signr);
}
......@@ -159,10 +137,8 @@ SystemResetException(struct pt_regs *regs)
errlog = FWNMI_get_errinfo(regs);
}
#ifdef CONFIG_DEBUGGER
if (debugger)
debugger(regs);
#endif
#ifdef PANIC_ON_ERROR
panic("System Reset");
......@@ -201,14 +177,13 @@ MachineCheckException(struct pt_regs *regs)
return;
}
#ifdef CONFIG_DEBUGGER
if (debugger_fault_handler) {
debugger_fault_handler(regs);
return;
}
if (debugger)
debugger(regs);
#endif
console_verbose();
spin_lock_irq(&die_lock);
bust_spinlocks(1);
......@@ -252,10 +227,8 @@ InstructionBreakpointException(struct pt_regs *regs)
{
siginfo_t info;
#ifdef CONFIG_DEBUGGER
if (debugger_iabr_match && debugger_iabr_match(regs))
return;
#endif
info.si_signo = SIGTRAP;
info.si_errno = 0;
......@@ -325,10 +298,9 @@ ProgramCheckException(struct pt_regs *regs)
} else if (regs->msr & 0x20000) {
/* trap exception */
#ifdef CONFIG_DEBUGGER
if (debugger_bpt && debugger_bpt(regs))
return;
#endif
info.si_signo = SIGTRAP;
info.si_errno = 0;
info.si_code = TRAP_BRKPT;
......@@ -352,10 +324,8 @@ SingleStepException(struct pt_regs *regs)
regs->msr &= ~MSR_SE; /* Turn off 'trace' bit */
#ifdef CONFIG_DEBUGGER
if (debugger_sstep && debugger_sstep(regs))
return;
#endif
info.si_signo = SIGTRAP;
info.si_errno = 0;
......@@ -402,7 +372,7 @@ AlignmentException(struct pt_regs *regs)
force_sig_info(SIGSEGV, &info, current);
} else {
/* Search exception table */
bad_page_fault(regs, regs->dar);
bad_page_fault(regs, regs->dar, SIGSEGV);
}
return;
......
arch/ppc64/mm/fault.c
View file @ 57014e07
......@@ -38,10 +38,7 @@
#include <asm/ppcdebug.h>
#if defined(CONFIG_XMON) || defined(CONFIG_KGDB)
extern void (*debugger)(struct pt_regs *);
extern void (*debugger_fault_handler)(struct pt_regs *);
extern int (*debugger_dabr_match)(struct pt_regs *);
#ifdef CONFIG_DEBUG_KERNEL
int debugger_kernel_faults = 1;
#endif
......@@ -69,7 +66,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
if (regs->trap == 0x400)
error_code &= 0x48200000;
#if defined(CONFIG_XMON) || defined(CONFIG_KGDB)
#ifdef CONFIG_DEBUG_KERNEL
if (debugger_fault_handler && (regs->trap == 0x300 ||
regs->trap == 0x380)) {
debugger_fault_handler(regs);
......@@ -81,7 +78,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
if (debugger_dabr_match(regs))
return;
}
#endif /* CONFIG_XMON || CONFIG_KGDB */
#endif
if (in_interrupt() || mm == NULL) {
bad_page_fault(regs, address, SIGSEGV);
......@@ -102,7 +99,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
good_area:
code = SEGV_ACCERR;
/* a write */
if (is_write) {
if (!(vma->vm_flags & VM_WRITE))
......@@ -122,18 +119,18 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
switch (handle_mm_fault(mm, vma, address, is_write)) {
case 1:
current->min_flt++;
break;
case 2:
current->maj_flt++;
break;
case 0:
goto do_sigbus;
default:
goto out_of_memory;
switch (handle_mm_fault(mm, vma, address, is_write)) {
case 1:
current->min_flt++;
break;
case 2:
current->maj_flt++;
break;
case 0:
goto do_sigbus;
default:
goto out_of_memory;
}
up_read(&mm->mmap_sem);
......@@ -149,8 +146,8 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
info.si_code = code;
info.si_addr = (void *) address;
#ifdef CONFIG_XMON
ifppcdebug(PPCDBG_SIGNALXMON)
PPCDBG_ENTER_DEBUGGER_REGS(regs);
ifppcdebug(PPCDBG_SIGNALXMON)
PPCDBG_ENTER_DEBUGGER_REGS(regs);
#endif
force_sig_info(SIGSEGV, &info, current);
......@@ -207,10 +204,9 @@ bad_page_fault(struct pt_regs *regs, unsigned long address, int sig)
}
/* kernel has accessed a bad area */
#if defined(CONFIG_XMON) || defined(CONFIG_KGDB)
#ifdef CONFIG_DEBUG_KERNEL
if (debugger_kernel_faults)
debugger(regs);
#endif
die("Kernel access of bad area", regs, sig);
}
arch/ppc64/mm/init.c
View file @ 57014e07
......@@ -85,14 +85,10 @@ extern struct task_struct *current_set[NR_CPUS];
void mm_init_ppc64(void);
unsigned long *pmac_find_end_of_memory(void);
extern unsigned long *find_end_of_memory(void);
extern pgd_t ioremap_dir[];
pgd_t * ioremap_pgd = (pgd_t *)&ioremap_dir;
static void map_io_page(unsigned long va, unsigned long pa, int flags);
extern void die_if_kernel(char *,struct pt_regs *,long);
unsigned long klimit = (unsigned long)_end;
......@@ -437,12 +433,11 @@ void free_initrd_mem(unsigned long start, unsigned long end)
}
#endif
/*
* Do very early mm setup.
*/
void __init mm_init_ppc64(void) {
void __init mm_init_ppc64(void)
{
struct paca_struct *lpaca;
unsigned long guard_page, index;
......@@ -470,8 +465,6 @@ void __init mm_init_ppc64(void) {
ppc_md.progress("MM:exit", 0x211);
}
/*
* Initialize the bootmem system and give it all the memory we
* have available.
......
include/asm-ppc64/system.h
View file @ 57014e07
......@@ -55,9 +55,31 @@
#define smp_wmb() __asm__ __volatile__("": : :"memory")
#endif /* CONFIG_SMP */
#ifdef CONFIG_DEBUG_KERNEL
extern void (*debugger)(struct pt_regs *regs);
extern int (*debugger_bpt)(struct pt_regs *regs);
extern int (*debugger_sstep)(struct pt_regs *regs);
extern int (*debugger_iabr_match)(struct pt_regs *regs);
extern int (*debugger_dabr_match)(struct pt_regs *regs);
extern void (*debugger_fault_handler)(struct pt_regs *regs);
#else
#define debugger(regs) do { } while (0)
#define debugger_bpt(regs) 0
#define debugger_sstep(regs) 0
#define debugger_iabr_match(regs) 0
#define debugger_dabr_match(regs) 0
#define debugger_fault_handler ((void (*)(struct pt_regs *))0)
#endif
#ifdef CONFIG_XMON
extern void xmon_irq(int, void *, struct pt_regs *);
extern void xmon(struct pt_regs *excp);
extern void xmon(struct pt_regs *regs);
extern int xmon_bpt(struct pt_regs *regs);
extern int xmon_sstep(struct pt_regs *regs);
extern int xmon_iabr_match(struct pt_regs *regs);
extern int xmon_dabr_match(struct pt_regs *regs);
extern void (*xmon_fault_handler)(struct pt_regs *regs);
#endif
extern void print_backtrace(unsigned long *);
......
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