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Message-ID: <1411065194.2017.76.camel@x220>
Date: Thu, 18 Sep 2014 20:33:14 +0200
From: Paul Bolle <pebolle@...cali.nl>
To: David Howells <dhowells@...hat.com>,
Koichi Yasutake <yasutake.koichi@...panasonic.com>
Cc: Richard Weinberger <richard@....at>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
linux-am33-list@...hat.com, linux-kernel@...r.kernel.org
Subject: [PATCH 3/5] MN10300: Remove all checks for CONFIG_GDBSTUB
The Kconfig symbol GDBSTUB was removed. Now remove the checks for its
macro and all dead code hidden behind them.
Signed-off-by: Paul Bolle <pebolle@...cali.nl>
---
arch/mn10300/kernel/Makefile | 1 -
arch/mn10300/kernel/entry.S | 21 -
arch/mn10300/kernel/gdb-low.S | 115 --
arch/mn10300/kernel/gdb-stub.c | 1923 --------------------------------
arch/mn10300/kernel/head.S | 10 -
arch/mn10300/kernel/mn10300-watchdog.c | 13 +-
arch/mn10300/kernel/smp-low.S | 4 -
arch/mn10300/kernel/smp.c | 7 -
arch/mn10300/mm/fault.c | 8 -
arch/mn10300/mm/tlb-mn10300.S | 14 -
10 files changed, 1 insertion(+), 2115 deletions(-)
delete mode 100644 arch/mn10300/kernel/gdb-low.S
delete mode 100644 arch/mn10300/kernel/gdb-stub.c
diff --git a/arch/mn10300/kernel/Makefile b/arch/mn10300/kernel/Makefile
index 561029f7fa44..ce9f01778a86 100644
--- a/arch/mn10300/kernel/Makefile
+++ b/arch/mn10300/kernel/Makefile
@@ -17,7 +17,6 @@ obj-$(CONFIG_MN10300_WD_TIMER) += mn10300-watchdog.o mn10300-watchdog-low.o
obj-$(CONFIG_MN10300_TTYSM) += mn10300-serial.o mn10300-serial-low.o \
mn10300-debug.o
-obj-$(CONFIG_GDBSTUB) += gdb-stub.o gdb-low.o
obj-$(CONFIG_GDBSTUB_ON_TTYSx) += gdb-io-serial.o gdb-io-serial-low.o
obj-$(CONFIG_GDBSTUB_ON_TTYSMx) += gdb-io-ttysm.o gdb-io-ttysm-low.o
diff --git a/arch/mn10300/kernel/entry.S b/arch/mn10300/kernel/entry.S
index 177d61de51c9..f015df03d268 100644
--- a/arch/mn10300/kernel/entry.S
+++ b/arch/mn10300/kernel/entry.S
@@ -27,10 +27,6 @@
#include <asm/asm-offsets.h>
#include <asm/frame.inc>
-#if defined(CONFIG_SMP) && defined(CONFIG_GDBSTUB)
-#include <asm/gdb-stub.h>
-#endif /* CONFIG_SMP && CONFIG_GDBSTUB */
-
#ifdef CONFIG_PREEMPT
#define preempt_stop LOCAL_IRQ_DISABLE
#else
@@ -368,23 +364,6 @@ __common_exception_nonmi:
mov -1,d0
mov d0,(REG_ORIG_D0,fp)
-#ifdef CONFIG_GDBSTUB
-#ifdef CONFIG_SMP
- call gdbstub_busy_check[],0
- and d0,d0 # check return value
- beq 2f
-#else /* CONFIG_SMP */
- btst 0x01,(gdbstub_busy)
- beq 2f
-#endif /* CONFIG_SMP */
- and ~EPSW_IE,epsw
- mov fp,d0
- mov a2,d1
- call gdbstub_exception[],0 # gdbstub itself caused an exception
- bra restore_all
-2:
-#endif /* CONFIG_GDBSTUB */
-
mov fp,d0 # arg 0: stacked register file
mov a2,d1 # arg 1: exception number
lsr 1,a2
diff --git a/arch/mn10300/kernel/gdb-low.S b/arch/mn10300/kernel/gdb-low.S
deleted file mode 100644
index e2725552cd82..000000000000
--- a/arch/mn10300/kernel/gdb-low.S
+++ /dev/null
@@ -1,115 +0,0 @@
-###############################################################################
-#
-# MN10300 Low-level gdbstub routines
-#
-# Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
-# Written by David Howells (dhowells@...hat.com)
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public Licence
-# as published by the Free Software Foundation; either version
-# 2 of the Licence, or (at your option) any later version.
-#
-###############################################################################
-#include <linux/sys.h>
-#include <linux/linkage.h>
-#include <asm/smp.h>
-#include <asm/cache.h>
-#include <asm/cpu-regs.h>
-#include <asm/exceptions.h>
-#include <asm/frame.inc>
-#include <asm/serial-regs.h>
-
- .text
-
-###############################################################################
-#
-# GDB stub read memory with guard
-# - D0 holds the memory address to read
-# - D1 holds the address to store the byte into
-#
-###############################################################################
- .globl gdbstub_read_byte_guard
- .globl gdbstub_read_byte_cont
-ENTRY(gdbstub_read_byte)
- mov d0,a0
- mov d1,a1
- clr d0
-gdbstub_read_byte_guard:
- movbu (a0),d1
-gdbstub_read_byte_cont:
- movbu d1,(a1)
- ret [],0
-
- .globl gdbstub_read_word_guard
- .globl gdbstub_read_word_cont
-ENTRY(gdbstub_read_word)
- mov d0,a0
- mov d1,a1
- clr d0
-gdbstub_read_word_guard:
- movhu (a0),d1
-gdbstub_read_word_cont:
- movhu d1,(a1)
- ret [],0
-
- .globl gdbstub_read_dword_guard
- .globl gdbstub_read_dword_cont
-ENTRY(gdbstub_read_dword)
- mov d0,a0
- mov d1,a1
- clr d0
-gdbstub_read_dword_guard:
- mov (a0),d1
-gdbstub_read_dword_cont:
- mov d1,(a1)
- ret [],0
-
-###############################################################################
-#
-# GDB stub write memory with guard
-# - D0 holds the byte to store
-# - D1 holds the memory address to write
-#
-###############################################################################
- .globl gdbstub_write_byte_guard
- .globl gdbstub_write_byte_cont
-ENTRY(gdbstub_write_byte)
- mov d0,a0
- mov d1,a1
- clr d0
-gdbstub_write_byte_guard:
- movbu a0,(a1)
-gdbstub_write_byte_cont:
- ret [],0
-
- .globl gdbstub_write_word_guard
- .globl gdbstub_write_word_cont
-ENTRY(gdbstub_write_word)
- mov d0,a0
- mov d1,a1
- clr d0
-gdbstub_write_word_guard:
- movhu a0,(a1)
-gdbstub_write_word_cont:
- ret [],0
-
- .globl gdbstub_write_dword_guard
- .globl gdbstub_write_dword_cont
-ENTRY(gdbstub_write_dword)
- mov d0,a0
- mov d1,a1
- clr d0
-gdbstub_write_dword_guard:
- mov a0,(a1)
-gdbstub_write_dword_cont:
- ret [],0
-
-###############################################################################
-#
-# GDB stub BUG() trap
-#
-###############################################################################
-ENTRY(__gdbstub_bug_trap)
- .byte 0xF7,0xF7 # don't use 0xFF as the JTAG unit preempts that
- ret [],0
diff --git a/arch/mn10300/kernel/gdb-stub.c b/arch/mn10300/kernel/gdb-stub.c
deleted file mode 100644
index a128c57b586b..000000000000
--- a/arch/mn10300/kernel/gdb-stub.c
+++ /dev/null
@@ -1,1923 +0,0 @@
-/* MN10300 GDB stub
- *
- * Originally written by Glenn Engel, Lake Stevens Instrument Division
- *
- * Contributed by HP Systems
- *
- * Modified for SPARC by Stu Grossman, Cygnus Support.
- *
- * Modified for Linux/MIPS (and MIPS in general) by Andreas Busse
- * Send complaints, suggestions etc. to <andy@...dorf-gmbh.de>
- *
- * Copyright (C) 1995 Andreas Busse
- *
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Modified for Linux/mn10300 by David Howells <dhowells@...hat.com>
- */
-
-/*
- * 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 BREAK instruction.
- *
- *
- * 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
- *
- * 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
- *
- *
- * ==============
- * MORE EXAMPLES:
- * ==============
- *
- * For reference -- the following are the steps that one
- * company took (RidgeRun Inc) to get remote gdb debugging
- * going. In this scenario the host machine was a PC and the
- * target platform was a Galileo EVB64120A MIPS evaluation
- * board.
- *
- * Step 1:
- * First download gdb-5.0.tar.gz from the internet.
- * and then build/install the package.
- *
- * Example:
- * $ tar zxf gdb-5.0.tar.gz
- * $ cd gdb-5.0
- * $ ./configure --target=am33_2.0-linux-gnu
- * $ make
- * $ install
- * am33_2.0-linux-gnu-gdb
- *
- * Step 2:
- * Configure linux for remote debugging and build it.
- *
- * Example:
- * $ cd ~/linux
- * $ make menuconfig <go to "Kernel Hacking" and turn on remote debugging>
- * $ make dep; make vmlinux
- *
- * Step 3:
- * Download the kernel to the remote target and start
- * the kernel running. It will promptly halt and wait
- * for the host gdb session to connect. It does this
- * since the "Kernel Hacking" option has defined
- * CONFIG_REMOTE_DEBUG which in turn enables your calls
- * to:
- * set_debug_traps();
- * breakpoint();
- *
- * Step 4:
- * Start the gdb session on the host.
- *
- * Example:
- * $ am33_2.0-linux-gnu-gdb vmlinux
- * (gdb) set remotebaud 115200
- * (gdb) target remote /dev/ttyS1
- * ...at this point you are connected to
- * the remote target and can use gdb
- * in the normal fasion. Setting
- * breakpoints, single stepping,
- * printing variables, etc.
- *
- */
-
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/console.h>
-#include <linux/init.h>
-#include <linux/bug.h>
-
-#include <asm/pgtable.h>
-#include <asm/gdb-stub.h>
-#include <asm/exceptions.h>
-#include <asm/debugger.h>
-#include <asm/serial-regs.h>
-#include <asm/busctl-regs.h>
-#include <unit/leds.h>
-#include <unit/serial.h>
-
-/* define to use F7F7 rather than FF which is subverted by JTAG debugger */
-#undef GDBSTUB_USE_F7F7_AS_BREAKPOINT
-
-/*
- * BUFMAX defines the maximum number of characters in inbound/outbound buffers
- * at least NUMREGBYTES*2 are needed for register packets
- */
-#define BUFMAX 2048
-
-static const char gdbstub_banner[] =
- "Linux/MN10300 GDB Stub (c) RedHat 2007\n";
-
-u8 gdbstub_rx_buffer[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
-u32 gdbstub_rx_inp;
-u32 gdbstub_rx_outp;
-u8 gdbstub_busy;
-u8 gdbstub_rx_overflow;
-u8 gdbstub_rx_unget;
-
-static u8 gdbstub_flush_caches;
-static char input_buffer[BUFMAX];
-static char output_buffer[BUFMAX];
-static char trans_buffer[BUFMAX];
-
-struct gdbstub_bkpt {
- u8 *addr; /* address of breakpoint */
- u8 len; /* size of breakpoint */
- u8 origbytes[7]; /* original bytes */
-};
-
-static struct gdbstub_bkpt gdbstub_bkpts[256];
-
-/*
- * local prototypes
- */
-static void getpacket(char *buffer);
-static int putpacket(char *buffer);
-static int computeSignal(enum exception_code excep);
-static int hex(unsigned char ch);
-static int hexToInt(char **ptr, int *intValue);
-static unsigned char *mem2hex(const void *mem, char *buf, int count,
- int may_fault);
-static const char *hex2mem(const char *buf, void *_mem, int count,
- int may_fault);
-
-/*
- * 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;
-}
-
-#ifdef CONFIG_GDBSTUB_DEBUGGING
-
-void debug_to_serial(const char *p, int n)
-{
- __debug_to_serial(p, n);
- /* gdbstub_console_write(NULL, p, n); */
-}
-
-void gdbstub_printk(const char *fmt, ...)
-{
- va_list args;
- int len;
-
- /* Emit the output into the temporary buffer */
- va_start(args, fmt);
- len = vsnprintf(trans_buffer, sizeof(trans_buffer), fmt, args);
- va_end(args);
- debug_to_serial(trans_buffer, len);
-}
-
-#endif
-
-static inline char *gdbstub_strcpy(char *dst, const char *src)
-{
- int loop = 0;
- while ((dst[loop] = src[loop]))
- loop++;
- return dst;
-}
-
-/*
- * scan for the sequence $<data>#<checksum>
- */
-static void getpacket(char *buffer)
-{
- unsigned char checksum;
- unsigned char xmitcsum;
- unsigned char ch;
- int count, i, ret, error;
-
- for (;;) {
- /*
- * wait around for the start character,
- * ignore all other characters
- */
- do {
- gdbstub_io_rx_char(&ch, 0);
- } while (ch != '$');
-
- checksum = 0;
- xmitcsum = -1;
- count = 0;
- error = 0;
-
- /*
- * now, read until a # or end of buffer is found
- */
- while (count < BUFMAX) {
- ret = gdbstub_io_rx_char(&ch, 0);
- if (ret < 0)
- error = ret;
-
- if (ch == '#')
- break;
- checksum += ch;
- buffer[count] = ch;
- count++;
- }
-
- if (error == -EIO) {
- gdbstub_proto("### GDB Rx Error - Skipping packet"
- " ###\n");
- gdbstub_proto("### GDB Tx NAK\n");
- gdbstub_io_tx_char('-');
- continue;
- }
-
- if (count >= BUFMAX || error)
- continue;
-
- buffer[count] = 0;
-
- /* read the checksum */
- ret = gdbstub_io_rx_char(&ch, 0);
- if (ret < 0)
- error = ret;
- xmitcsum = hex(ch) << 4;
-
- ret = gdbstub_io_rx_char(&ch, 0);
- if (ret < 0)
- error = ret;
- xmitcsum |= hex(ch);
-
- if (error) {
- if (error == -EIO)
- gdbstub_io("### GDB Rx Error -"
- " Skipping packet\n");
- gdbstub_io("### GDB Tx NAK\n");
- gdbstub_io_tx_char('-');
- continue;
- }
-
- /* check the checksum */
- if (checksum != xmitcsum) {
- gdbstub_io("### GDB Tx NAK\n");
- gdbstub_io_tx_char('-'); /* failed checksum */
- continue;
- }
-
- gdbstub_proto("### GDB Rx '$%s#%02x' ###\n", buffer, checksum);
- gdbstub_io("### GDB Tx ACK\n");
- gdbstub_io_tx_char('+'); /* successful transfer */
-
- /*
- * if a sequence char is present,
- * reply the sequence ID
- */
- if (buffer[2] == ':') {
- gdbstub_io_tx_char(buffer[0]);
- gdbstub_io_tx_char(buffer[1]);
-
- /*
- * remove sequence chars from buffer
- */
- count = 0;
- while (buffer[count])
- count++;
- for (i = 3; i <= count; i++)
- buffer[i - 3] = buffer[i];
- }
-
- break;
- }
-}
-
-/*
- * send the packet in buffer.
- * - return 0 if successfully ACK'd
- * - return 1 if abandoned due to new incoming packet
- */
-static int putpacket(char *buffer)
-{
- unsigned char checksum;
- unsigned char ch;
- int count;
-
- /*
- * $<packet info>#<checksum>.
- */
- gdbstub_proto("### GDB Tx $'%s'#?? ###\n", buffer);
-
- do {
- gdbstub_io_tx_char('$');
- checksum = 0;
- count = 0;
-
- while ((ch = buffer[count]) != 0) {
- gdbstub_io_tx_char(ch);
- checksum += ch;
- count += 1;
- }
-
- gdbstub_io_tx_char('#');
- gdbstub_io_tx_char(hex_asc_hi(checksum));
- gdbstub_io_tx_char(hex_asc_lo(checksum));
-
- } while (gdbstub_io_rx_char(&ch, 0),
- ch == '-' && (gdbstub_io("### GDB Rx NAK\n"), 0),
- ch != '-' && ch != '+' &&
- (gdbstub_io("### GDB Rx ??? %02x\n", ch), 0),
- ch != '+' && ch != '$');
-
- if (ch == '+') {
- gdbstub_io("### GDB Rx ACK\n");
- return 0;
- }
-
- gdbstub_io("### GDB Tx Abandoned\n");
- gdbstub_rx_unget = ch;
- return 1;
-}
-
-/*
- * 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;
-
- while (**ptr) {
- hexValue = hex(**ptr);
- if (hexValue < 0)
- break;
-
- *intValue = (*intValue << 4) | hexValue;
- numChars++;
-
- (*ptr)++;
- }
-
- return (numChars);
-}
-
-#ifdef CONFIG_GDBSTUB_ALLOW_SINGLE_STEP
-/*
- * We single-step by setting breakpoints. When an exception
- * is handled, we need to restore the instructions hoisted
- * when the breakpoints were set.
- *
- * This is where we save the original instructions.
- */
-static struct gdb_bp_save {
- u8 *addr;
- u8 opcode[2];
-} step_bp[2];
-
-static const unsigned char gdbstub_insn_sizes[256] =
-{
- /* 1 2 3 4 5 6 7 8 9 a b c d e f */
- 1, 3, 3, 3, 1, 3, 3, 3, 1, 3, 3, 3, 1, 3, 3, 3, /* 0 */
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 1 */
- 2, 2, 2, 2, 3, 3, 3, 3, 2, 2, 2, 2, 3, 3, 3, 3, /* 2 */
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, /* 3 */
- 1, 1, 2, 2, 1, 1, 2, 2, 1, 1, 2, 2, 1, 1, 2, 2, /* 4 */
- 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, /* 5 */
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 6 */
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 7 */
- 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, /* 8 */
- 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, /* 9 */
- 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, /* a */
- 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, /* b */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 2, 2, /* c */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* d */
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* e */
- 0, 2, 2, 2, 2, 2, 2, 4, 0, 3, 0, 4, 0, 6, 7, 1 /* f */
-};
-
-static int __gdbstub_mark_bp(u8 *addr, int ix)
-{
- /* vmalloc area */
- if (((u8 *) VMALLOC_START <= addr) && (addr < (u8 *) VMALLOC_END))
- goto okay;
- /* SRAM, SDRAM */
- if (((u8 *) 0x80000000UL <= addr) && (addr < (u8 *) 0xa0000000UL))
- goto okay;
- return 0;
-
-okay:
- if (gdbstub_read_byte(addr + 0, &step_bp[ix].opcode[0]) < 0 ||
- gdbstub_read_byte(addr + 1, &step_bp[ix].opcode[1]) < 0)
- return 0;
-
- step_bp[ix].addr = addr;
- return 1;
-}
-
-static inline void __gdbstub_restore_bp(void)
-{
-#ifdef GDBSTUB_USE_F7F7_AS_BREAKPOINT
- if (step_bp[0].addr) {
- gdbstub_write_byte(step_bp[0].opcode[0], step_bp[0].addr + 0);
- gdbstub_write_byte(step_bp[0].opcode[1], step_bp[0].addr + 1);
- }
- if (step_bp[1].addr) {
- gdbstub_write_byte(step_bp[1].opcode[0], step_bp[1].addr + 0);
- gdbstub_write_byte(step_bp[1].opcode[1], step_bp[1].addr + 1);
- }
-#else
- if (step_bp[0].addr)
- gdbstub_write_byte(step_bp[0].opcode[0], step_bp[0].addr + 0);
- if (step_bp[1].addr)
- gdbstub_write_byte(step_bp[1].opcode[0], step_bp[1].addr + 0);
-#endif
-
- gdbstub_flush_caches = 1;
-
- step_bp[0].addr = NULL;
- step_bp[0].opcode[0] = 0;
- step_bp[0].opcode[1] = 0;
- step_bp[1].addr = NULL;
- step_bp[1].opcode[0] = 0;
- step_bp[1].opcode[1] = 0;
-}
-
-/*
- * emulate single stepping by means of breakpoint instructions
- */
-static int gdbstub_single_step(struct pt_regs *regs)
-{
- unsigned size;
- uint32_t x;
- uint8_t cur, *pc, *sp;
-
- step_bp[0].addr = NULL;
- step_bp[0].opcode[0] = 0;
- step_bp[0].opcode[1] = 0;
- step_bp[1].addr = NULL;
- step_bp[1].opcode[0] = 0;
- step_bp[1].opcode[1] = 0;
- x = 0;
-
- pc = (u8 *) regs->pc;
- sp = (u8 *) (regs + 1);
- if (gdbstub_read_byte(pc, &cur) < 0)
- return -EFAULT;
-
- gdbstub_bkpt("Single Step from %p { %02x }\n", pc, cur);
-
- gdbstub_flush_caches = 1;
-
- size = gdbstub_insn_sizes[cur];
- if (size > 0) {
- if (!__gdbstub_mark_bp(pc + size, 0))
- goto fault;
- } else {
- switch (cur) {
- /* Bxx (d8,PC) */
- case 0xc0 ... 0xca:
- if (gdbstub_read_byte(pc + 1, (u8 *) &x) < 0)
- goto fault;
- if (!__gdbstub_mark_bp(pc + 2, 0))
- goto fault;
- if ((x < 0 || x > 2) &&
- !__gdbstub_mark_bp(pc + (s8) x, 1))
- goto fault;
- break;
-
- /* LXX (d8,PC) */
- case 0xd0 ... 0xda:
- if (!__gdbstub_mark_bp(pc + 1, 0))
- goto fault;
- if (regs->pc != regs->lar &&
- !__gdbstub_mark_bp((u8 *) regs->lar, 1))
- goto fault;
- break;
-
- /* SETLB - loads the next for bytes into the LIR
- * register */
- case 0xdb:
- if (!__gdbstub_mark_bp(pc + 1, 0))
- goto fault;
- break;
-
- /* JMP (d16,PC) or CALL (d16,PC) */
- case 0xcc:
- case 0xcd:
- if (gdbstub_read_byte(pc + 1, ((u8 *) &x) + 0) < 0 ||
- gdbstub_read_byte(pc + 2, ((u8 *) &x) + 1) < 0)
- goto fault;
- if (!__gdbstub_mark_bp(pc + (s16) x, 0))
- goto fault;
- break;
-
- /* JMP (d32,PC) or CALL (d32,PC) */
- case 0xdc:
- case 0xdd:
- if (gdbstub_read_byte(pc + 1, ((u8 *) &x) + 0) < 0 ||
- gdbstub_read_byte(pc + 2, ((u8 *) &x) + 1) < 0 ||
- gdbstub_read_byte(pc + 3, ((u8 *) &x) + 2) < 0 ||
- gdbstub_read_byte(pc + 4, ((u8 *) &x) + 3) < 0)
- goto fault;
- if (!__gdbstub_mark_bp(pc + (s32) x, 0))
- goto fault;
- break;
-
- /* RETF */
- case 0xde:
- if (!__gdbstub_mark_bp((u8 *) regs->mdr, 0))
- goto fault;
- break;
-
- /* RET */
- case 0xdf:
- if (gdbstub_read_byte(pc + 2, (u8 *) &x) < 0)
- goto fault;
- sp += (s8)x;
- if (gdbstub_read_byte(sp + 0, ((u8 *) &x) + 0) < 0 ||
- gdbstub_read_byte(sp + 1, ((u8 *) &x) + 1) < 0 ||
- gdbstub_read_byte(sp + 2, ((u8 *) &x) + 2) < 0 ||
- gdbstub_read_byte(sp + 3, ((u8 *) &x) + 3) < 0)
- goto fault;
- if (!__gdbstub_mark_bp((u8 *) x, 0))
- goto fault;
- break;
-
- case 0xf0:
- if (gdbstub_read_byte(pc + 1, &cur) < 0)
- goto fault;
-
- if (cur >= 0xf0 && cur <= 0xf7) {
- /* JMP (An) / CALLS (An) */
- switch (cur & 3) {
- case 0: x = regs->a0; break;
- case 1: x = regs->a1; break;
- case 2: x = regs->a2; break;
- case 3: x = regs->a3; break;
- }
- if (!__gdbstub_mark_bp((u8 *) x, 0))
- goto fault;
- } else if (cur == 0xfc) {
- /* RETS */
- if (gdbstub_read_byte(
- sp + 0, ((u8 *) &x) + 0) < 0 ||
- gdbstub_read_byte(
- sp + 1, ((u8 *) &x) + 1) < 0 ||
- gdbstub_read_byte(
- sp + 2, ((u8 *) &x) + 2) < 0 ||
- gdbstub_read_byte(
- sp + 3, ((u8 *) &x) + 3) < 0)
- goto fault;
- if (!__gdbstub_mark_bp((u8 *) x, 0))
- goto fault;
- } else if (cur == 0xfd) {
- /* RTI */
- if (gdbstub_read_byte(
- sp + 4, ((u8 *) &x) + 0) < 0 ||
- gdbstub_read_byte(
- sp + 5, ((u8 *) &x) + 1) < 0 ||
- gdbstub_read_byte(
- sp + 6, ((u8 *) &x) + 2) < 0 ||
- gdbstub_read_byte(
- sp + 7, ((u8 *) &x) + 3) < 0)
- goto fault;
- if (!__gdbstub_mark_bp((u8 *) x, 0))
- goto fault;
- } else {
- if (!__gdbstub_mark_bp(pc + 2, 0))
- goto fault;
- }
-
- break;
-
- /* potential 3-byte conditional branches */
- case 0xf8:
- if (gdbstub_read_byte(pc + 1, &cur) < 0)
- goto fault;
- if (!__gdbstub_mark_bp(pc + 3, 0))
- goto fault;
-
- if (cur >= 0xe8 && cur <= 0xeb) {
- if (gdbstub_read_byte(
- pc + 2, ((u8 *) &x) + 0) < 0)
- goto fault;
- if ((x < 0 || x > 3) &&
- !__gdbstub_mark_bp(pc + (s8) x, 1))
- goto fault;
- }
- break;
-
- case 0xfa:
- if (gdbstub_read_byte(pc + 1, &cur) < 0)
- goto fault;
-
- if (cur == 0xff) {
- /* CALLS (d16,PC) */
- if (gdbstub_read_byte(
- pc + 2, ((u8 *) &x) + 0) < 0 ||
- gdbstub_read_byte(
- pc + 3, ((u8 *) &x) + 1) < 0)
- goto fault;
- if (!__gdbstub_mark_bp(pc + (s16) x, 0))
- goto fault;
- } else {
- if (!__gdbstub_mark_bp(pc + 4, 0))
- goto fault;
- }
- break;
-
- case 0xfc:
- if (gdbstub_read_byte(pc + 1, &cur) < 0)
- goto fault;
- if (cur == 0xff) {
- /* CALLS (d32,PC) */
- if (gdbstub_read_byte(
- pc + 2, ((u8 *) &x) + 0) < 0 ||
- gdbstub_read_byte(
- pc + 3, ((u8 *) &x) + 1) < 0 ||
- gdbstub_read_byte(
- pc + 4, ((u8 *) &x) + 2) < 0 ||
- gdbstub_read_byte(
- pc + 5, ((u8 *) &x) + 3) < 0)
- goto fault;
- if (!__gdbstub_mark_bp(
- pc + (s32) x, 0))
- goto fault;
- } else {
- if (!__gdbstub_mark_bp(
- pc + 6, 0))
- goto fault;
- }
- break;
-
- }
- }
-
- gdbstub_bkpt("Step: %02x at %p; %02x at %p\n",
- step_bp[0].opcode[0], step_bp[0].addr,
- step_bp[1].opcode[0], step_bp[1].addr);
-
- if (step_bp[0].addr) {
-#ifdef GDBSTUB_USE_F7F7_AS_BREAKPOINT
- if (gdbstub_write_byte(0xF7, step_bp[0].addr + 0) < 0 ||
- gdbstub_write_byte(0xF7, step_bp[0].addr + 1) < 0)
- goto fault;
-#else
- if (gdbstub_write_byte(0xFF, step_bp[0].addr + 0) < 0)
- goto fault;
-#endif
- }
-
- if (step_bp[1].addr) {
-#ifdef GDBSTUB_USE_F7F7_AS_BREAKPOINT
- if (gdbstub_write_byte(0xF7, step_bp[1].addr + 0) < 0 ||
- gdbstub_write_byte(0xF7, step_bp[1].addr + 1) < 0)
- goto fault;
-#else
- if (gdbstub_write_byte(0xFF, step_bp[1].addr + 0) < 0)
- goto fault;
-#endif
- }
-
- return 0;
-
- fault:
- /* uh-oh - silly address alert, try and restore things */
- __gdbstub_restore_bp();
- return -EFAULT;
-}
-#endif /* CONFIG_GDBSTUB_ALLOW_SINGLE_STEP */
-
-#ifdef CONFIG_GDBSTUB_CONSOLE
-
-void gdbstub_console_write(struct console *con, const char *p, unsigned n)
-{
- static const char gdbstub_cr[] = { 0x0d };
- char outbuf[26];
- int qty;
- u8 busy;
-
- busy = gdbstub_busy;
- gdbstub_busy = 1;
-
- outbuf[0] = 'O';
-
- while (n > 0) {
- qty = 1;
-
- while (n > 0 && qty < 20) {
- mem2hex(p, outbuf + qty, 2, 0);
- qty += 2;
- if (*p == 0x0a) {
- mem2hex(gdbstub_cr, outbuf + qty, 2, 0);
- qty += 2;
- }
- p++;
- n--;
- }
-
- outbuf[qty] = 0;
- putpacket(outbuf);
- }
-
- gdbstub_busy = busy;
-}
-
-static kdev_t gdbstub_console_dev(struct console *con)
-{
- return MKDEV(1, 3); /* /dev/null */
-}
-
-static struct console gdbstub_console = {
- .name = "gdb",
- .write = gdbstub_console_write,
- .device = gdbstub_console_dev,
- .flags = CON_PRINTBUFFER,
- .index = -1,
-};
-
-#endif
-
-/*
- * Convert the memory pointed to by mem into hex, placing result in buf.
- * - if successful, return a pointer to the last char put in buf (NUL)
- * - in case of mem fault, return NULL
- * may_fault is non-zero if we are reading from arbitrary memory, but is
- * currently not used.
- */
-static
-unsigned char *mem2hex(const void *_mem, char *buf, int count, int may_fault)
-{
- const u8 *mem = _mem;
- u8 ch[4];
-
- if ((u32) mem & 1 && count >= 1) {
- if (gdbstub_read_byte(mem, ch) != 0)
- return 0;
- buf = hex_byte_pack(buf, ch[0]);
- mem++;
- count--;
- }
-
- if ((u32) mem & 3 && count >= 2) {
- if (gdbstub_read_word(mem, ch) != 0)
- return 0;
- buf = hex_byte_pack(buf, ch[0]);
- buf = hex_byte_pack(buf, ch[1]);
- mem += 2;
- count -= 2;
- }
-
- while (count >= 4) {
- if (gdbstub_read_dword(mem, ch) != 0)
- return 0;
- buf = hex_byte_pack(buf, ch[0]);
- buf = hex_byte_pack(buf, ch[1]);
- buf = hex_byte_pack(buf, ch[2]);
- buf = hex_byte_pack(buf, ch[3]);
- mem += 4;
- count -= 4;
- }
-
- if (count >= 2) {
- if (gdbstub_read_word(mem, ch) != 0)
- return 0;
- buf = hex_byte_pack(buf, ch[0]);
- buf = hex_byte_pack(buf, ch[1]);
- mem += 2;
- count -= 2;
- }
-
- if (count >= 1) {
- if (gdbstub_read_byte(mem, ch) != 0)
- return 0;
- buf = hex_byte_pack(buf, ch[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
- * may_fault is non-zero if we are reading from arbitrary memory, but is
- * currently not used.
- */
-static
-const char *hex2mem(const char *buf, void *_mem, int count, int may_fault)
-{
- u8 *mem = _mem;
- union {
- u32 val;
- u8 b[4];
- } ch;
-
- if ((u32) mem & 1 && count >= 1) {
- ch.b[0] = hex(*buf++) << 4;
- ch.b[0] |= hex(*buf++);
- if (gdbstub_write_byte(ch.val, mem) != 0)
- return 0;
- mem++;
- count--;
- }
-
- if ((u32) mem & 3 && count >= 2) {
- ch.b[0] = hex(*buf++) << 4;
- ch.b[0] |= hex(*buf++);
- ch.b[1] = hex(*buf++) << 4;
- ch.b[1] |= hex(*buf++);
- if (gdbstub_write_word(ch.val, mem) != 0)
- return 0;
- mem += 2;
- count -= 2;
- }
-
- while (count >= 4) {
- ch.b[0] = hex(*buf++) << 4;
- ch.b[0] |= hex(*buf++);
- ch.b[1] = hex(*buf++) << 4;
- ch.b[1] |= hex(*buf++);
- ch.b[2] = hex(*buf++) << 4;
- ch.b[2] |= hex(*buf++);
- ch.b[3] = hex(*buf++) << 4;
- ch.b[3] |= hex(*buf++);
- if (gdbstub_write_dword(ch.val, mem) != 0)
- return 0;
- mem += 4;
- count -= 4;
- }
-
- if (count >= 2) {
- ch.b[0] = hex(*buf++) << 4;
- ch.b[0] |= hex(*buf++);
- ch.b[1] = hex(*buf++) << 4;
- ch.b[1] |= hex(*buf++);
- if (gdbstub_write_word(ch.val, mem) != 0)
- return 0;
- mem += 2;
- count -= 2;
- }
-
- if (count >= 1) {
- ch.b[0] = hex(*buf++) << 4;
- ch.b[0] |= hex(*buf++);
- if (gdbstub_write_byte(ch.val, mem) != 0)
- return 0;
- }
-
- return buf;
-}
-
-/*
- * This table contains the mapping between MN10300 exception codes, and
- * signals, which are primarily what GDB understands. It also indicates
- * which hardware traps we need to commandeer when initializing the stub.
- */
-static const struct excep_to_sig_map {
- enum exception_code excep; /* MN10300 exception code */
- unsigned char signo; /* Signal that we map this into */
-} excep_to_sig_map[] = {
- { EXCEP_ITLBMISS, SIGSEGV },
- { EXCEP_DTLBMISS, SIGSEGV },
- { EXCEP_TRAP, SIGTRAP },
- { EXCEP_ISTEP, SIGTRAP },
- { EXCEP_IBREAK, SIGTRAP },
- { EXCEP_OBREAK, SIGTRAP },
- { EXCEP_UNIMPINS, SIGILL },
- { EXCEP_UNIMPEXINS, SIGILL },
- { EXCEP_MEMERR, SIGSEGV },
- { EXCEP_MISALIGN, SIGSEGV },
- { EXCEP_BUSERROR, SIGBUS },
- { EXCEP_ILLINSACC, SIGSEGV },
- { EXCEP_ILLDATACC, SIGSEGV },
- { EXCEP_IOINSACC, SIGSEGV },
- { EXCEP_PRIVINSACC, SIGSEGV },
- { EXCEP_PRIVDATACC, SIGSEGV },
- { EXCEP_FPU_DISABLED, SIGFPE },
- { EXCEP_FPU_UNIMPINS, SIGFPE },
- { EXCEP_FPU_OPERATION, SIGFPE },
- { EXCEP_WDT, SIGALRM },
- { EXCEP_NMI, SIGQUIT },
- { EXCEP_IRQ_LEVEL0, SIGINT },
- { EXCEP_IRQ_LEVEL1, SIGINT },
- { EXCEP_IRQ_LEVEL2, SIGINT },
- { EXCEP_IRQ_LEVEL3, SIGINT },
- { EXCEP_IRQ_LEVEL4, SIGINT },
- { EXCEP_IRQ_LEVEL5, SIGINT },
- { EXCEP_IRQ_LEVEL6, SIGINT },
- { 0, 0}
-};
-
-/*
- * convert the MN10300 exception code into a UNIX signal number
- */
-static int computeSignal(enum exception_code excep)
-{
- const struct excep_to_sig_map *map;
-
- for (map = excep_to_sig_map; map->signo; map++)
- if (map->excep == excep)
- return map->signo;
-
- return SIGHUP; /* default for things we don't know about */
-}
-
-static u32 gdbstub_fpcr, gdbstub_fpufs_array[32];
-
-/*
- *
- */
-static void gdbstub_store_fpu(void)
-{
-#ifdef CONFIG_FPU
-
- asm volatile(
- "or %2,epsw\n"
-#ifdef CONFIG_MN10300_PROC_MN103E010
- "nop\n"
- "nop\n"
-#endif
- "mov %1, a1\n"
- "fmov fs0, (a1+)\n"
- "fmov fs1, (a1+)\n"
- "fmov fs2, (a1+)\n"
- "fmov fs3, (a1+)\n"
- "fmov fs4, (a1+)\n"
- "fmov fs5, (a1+)\n"
- "fmov fs6, (a1+)\n"
- "fmov fs7, (a1+)\n"
- "fmov fs8, (a1+)\n"
- "fmov fs9, (a1+)\n"
- "fmov fs10, (a1+)\n"
- "fmov fs11, (a1+)\n"
- "fmov fs12, (a1+)\n"
- "fmov fs13, (a1+)\n"
- "fmov fs14, (a1+)\n"
- "fmov fs15, (a1+)\n"
- "fmov fs16, (a1+)\n"
- "fmov fs17, (a1+)\n"
- "fmov fs18, (a1+)\n"
- "fmov fs19, (a1+)\n"
- "fmov fs20, (a1+)\n"
- "fmov fs21, (a1+)\n"
- "fmov fs22, (a1+)\n"
- "fmov fs23, (a1+)\n"
- "fmov fs24, (a1+)\n"
- "fmov fs25, (a1+)\n"
- "fmov fs26, (a1+)\n"
- "fmov fs27, (a1+)\n"
- "fmov fs28, (a1+)\n"
- "fmov fs29, (a1+)\n"
- "fmov fs30, (a1+)\n"
- "fmov fs31, (a1+)\n"
- "fmov fpcr, %0\n"
- : "=d"(gdbstub_fpcr)
- : "g" (&gdbstub_fpufs_array), "i"(EPSW_FE)
- : "a1"
- );
-#endif
-}
-
-/*
- *
- */
-static void gdbstub_load_fpu(void)
-{
-#ifdef CONFIG_FPU
-
- asm volatile(
- "or %1,epsw\n"
-#ifdef CONFIG_MN10300_PROC_MN103E010
- "nop\n"
- "nop\n"
-#endif
- "mov %0, a1\n"
- "fmov (a1+), fs0\n"
- "fmov (a1+), fs1\n"
- "fmov (a1+), fs2\n"
- "fmov (a1+), fs3\n"
- "fmov (a1+), fs4\n"
- "fmov (a1+), fs5\n"
- "fmov (a1+), fs6\n"
- "fmov (a1+), fs7\n"
- "fmov (a1+), fs8\n"
- "fmov (a1+), fs9\n"
- "fmov (a1+), fs10\n"
- "fmov (a1+), fs11\n"
- "fmov (a1+), fs12\n"
- "fmov (a1+), fs13\n"
- "fmov (a1+), fs14\n"
- "fmov (a1+), fs15\n"
- "fmov (a1+), fs16\n"
- "fmov (a1+), fs17\n"
- "fmov (a1+), fs18\n"
- "fmov (a1+), fs19\n"
- "fmov (a1+), fs20\n"
- "fmov (a1+), fs21\n"
- "fmov (a1+), fs22\n"
- "fmov (a1+), fs23\n"
- "fmov (a1+), fs24\n"
- "fmov (a1+), fs25\n"
- "fmov (a1+), fs26\n"
- "fmov (a1+), fs27\n"
- "fmov (a1+), fs28\n"
- "fmov (a1+), fs29\n"
- "fmov (a1+), fs30\n"
- "fmov (a1+), fs31\n"
- "fmov %2, fpcr\n"
- :
- : "g" (&gdbstub_fpufs_array), "i"(EPSW_FE), "d"(gdbstub_fpcr)
- : "a1"
- );
-#endif
-}
-
-/*
- * set a software breakpoint
- */
-int gdbstub_set_breakpoint(u8 *addr, int len)
-{
- int bkpt, loop, xloop;
-
-#ifdef GDBSTUB_USE_F7F7_AS_BREAKPOINT
- len = (len + 1) & ~1;
-#endif
-
- gdbstub_bkpt("setbkpt(%p,%d)\n", addr, len);
-
- for (bkpt = 255; bkpt >= 0; bkpt--)
- if (!gdbstub_bkpts[bkpt].addr)
- break;
- if (bkpt < 0)
- return -ENOSPC;
-
- for (loop = 0; loop < len; loop++)
- if (gdbstub_read_byte(&addr[loop],
- &gdbstub_bkpts[bkpt].origbytes[loop]
- ) < 0)
- return -EFAULT;
-
- gdbstub_flush_caches = 1;
-
-#ifdef GDBSTUB_USE_F7F7_AS_BREAKPOINT
- for (loop = 0; loop < len; loop++)
- if (gdbstub_write_byte(0xF7, &addr[loop]) < 0)
- goto restore;
-#else
- for (loop = 0; loop < len; loop++)
- if (gdbstub_write_byte(0xFF, &addr[loop]) < 0)
- goto restore;
-#endif
-
- gdbstub_bkpts[bkpt].addr = addr;
- gdbstub_bkpts[bkpt].len = len;
-
- gdbstub_bkpt("Set BKPT[%02x]: %p-%p {%02x%02x%02x%02x%02x%02x%02x}\n",
- bkpt,
- gdbstub_bkpts[bkpt].addr,
- gdbstub_bkpts[bkpt].addr + gdbstub_bkpts[bkpt].len - 1,
- gdbstub_bkpts[bkpt].origbytes[0],
- gdbstub_bkpts[bkpt].origbytes[1],
- gdbstub_bkpts[bkpt].origbytes[2],
- gdbstub_bkpts[bkpt].origbytes[3],
- gdbstub_bkpts[bkpt].origbytes[4],
- gdbstub_bkpts[bkpt].origbytes[5],
- gdbstub_bkpts[bkpt].origbytes[6]
- );
-
- return 0;
-
-restore:
- for (xloop = 0; xloop < loop; xloop++)
- gdbstub_write_byte(gdbstub_bkpts[bkpt].origbytes[xloop],
- addr + xloop);
- return -EFAULT;
-}
-
-/*
- * clear a software breakpoint
- */
-int gdbstub_clear_breakpoint(u8 *addr, int len)
-{
- int bkpt, loop;
-
-#ifdef GDBSTUB_USE_F7F7_AS_BREAKPOINT
- len = (len + 1) & ~1;
-#endif
-
- gdbstub_bkpt("clearbkpt(%p,%d)\n", addr, len);
-
- for (bkpt = 255; bkpt >= 0; bkpt--)
- if (gdbstub_bkpts[bkpt].addr == addr &&
- gdbstub_bkpts[bkpt].len == len)
- break;
- if (bkpt < 0)
- return -ENOENT;
-
- gdbstub_bkpts[bkpt].addr = NULL;
-
- gdbstub_flush_caches = 1;
-
- for (loop = 0; loop < len; loop++)
- if (gdbstub_write_byte(gdbstub_bkpts[bkpt].origbytes[loop],
- addr + loop) < 0)
- return -EFAULT;
-
- return 0;
-}
-
-/*
- * This function does all command processing for interfacing to gdb
- * - returns 0 if the exception should be skipped, -ERROR otherwise.
- */
-static int gdbstub(struct pt_regs *regs, enum exception_code excep)
-{
- unsigned long *stack;
- unsigned long epsw, mdr;
- uint32_t zero, ssp;
- uint8_t broke;
- char *ptr;
- int sigval;
- int addr;
- int length;
- int loop;
-
- if (excep == EXCEP_FPU_DISABLED)
- return -ENOTSUPP;
-
- gdbstub_flush_caches = 0;
-
- mn10300_set_gdbleds(1);
-
- asm volatile("mov mdr,%0" : "=d"(mdr));
- local_save_flags(epsw);
- arch_local_change_intr_mask_level(
- NUM2EPSW_IM(CONFIG_DEBUGGER_IRQ_LEVEL + 1));
-
- gdbstub_store_fpu();
-
-#ifdef CONFIG_GDBSTUB_IMMEDIATE
- /* skip the initial pause loop */
- if (regs->pc == (unsigned long) __gdbstub_pause)
- regs->pc = (unsigned long) start_kernel;
-#endif
-
- /* if we were single stepping, restore the opcodes hoisted for the
- * breakpoint[s] */
- broke = 0;
-#ifdef CONFIG_GDBSTUB_ALLOW_SINGLE_STEP
- if ((step_bp[0].addr && step_bp[0].addr == (u8 *) regs->pc) ||
- (step_bp[1].addr && step_bp[1].addr == (u8 *) regs->pc))
- broke = 1;
-
- __gdbstub_restore_bp();
-#endif
-
- if (gdbstub_rx_unget) {
- sigval = SIGINT;
- if (gdbstub_rx_unget != 3)
- goto packet_waiting;
- gdbstub_rx_unget = 0;
- }
-
- stack = (unsigned long *) regs->sp;
- sigval = broke ? SIGTRAP : computeSignal(excep);
-
- /* send information about a BUG() */
- if (!user_mode(regs) && excep == EXCEP_SYSCALL15) {
- const struct bug_entry *bug;
-
- bug = find_bug(regs->pc);
- if (bug)
- goto found_bug;
- length = snprintf(trans_buffer, sizeof(trans_buffer),
- "BUG() at address %lx\n", regs->pc);
- goto send_bug_pkt;
-
- found_bug:
- length = snprintf(trans_buffer, sizeof(trans_buffer),
- "BUG() at address %lx (%s:%d)\n",
- regs->pc, bug->file, bug->line);
-
- send_bug_pkt:
- ptr = output_buffer;
- *ptr++ = 'O';
- ptr = mem2hex(trans_buffer, ptr, length, 0);
- *ptr = 0;
- putpacket(output_buffer);
-
- regs->pc -= 2;
- sigval = SIGABRT;
- } else if (regs->pc == (unsigned long) __gdbstub_bug_trap) {
- regs->pc = regs->mdr;
- sigval = SIGABRT;
- }
-
- /*
- * send a message to the debugger's user saying what happened if it may
- * not be clear cut (we can't map exceptions onto signals properly)
- */
- if (sigval != SIGINT && sigval != SIGTRAP && sigval != SIGILL) {
- static const char title[] = "Excep ", tbcberr[] = "BCBERR ";
- static const char crlf[] = "\r\n";
- char hx;
- u32 bcberr = BCBERR;
-
- ptr = output_buffer;
- *ptr++ = 'O';
- ptr = mem2hex(title, ptr, sizeof(title) - 1, 0);
-
- hx = hex_asc_hi(excep >> 8);
- ptr = hex_byte_pack(ptr, hx);
- hx = hex_asc_lo(excep >> 8);
- ptr = hex_byte_pack(ptr, hx);
- hx = hex_asc_hi(excep);
- ptr = hex_byte_pack(ptr, hx);
- hx = hex_asc_lo(excep);
- ptr = hex_byte_pack(ptr, hx);
-
- ptr = mem2hex(crlf, ptr, sizeof(crlf) - 1, 0);
- *ptr = 0;
- putpacket(output_buffer); /* send it off... */
-
- /* BCBERR */
- ptr = output_buffer;
- *ptr++ = 'O';
- ptr = mem2hex(tbcberr, ptr, sizeof(tbcberr) - 1, 0);
-
- hx = hex_asc_hi(bcberr >> 24);
- ptr = hex_byte_pack(ptr, hx);
- hx = hex_asc_lo(bcberr >> 24);
- ptr = hex_byte_pack(ptr, hx);
- hx = hex_asc_hi(bcberr >> 16);
- ptr = hex_byte_pack(ptr, hx);
- hx = hex_asc_lo(bcberr >> 16);
- ptr = hex_byte_pack(ptr, hx);
- hx = hex_asc_hi(bcberr >> 8);
- ptr = hex_byte_pack(ptr, hx);
- hx = hex_asc_lo(bcberr >> 8);
- ptr = hex_byte_pack(ptr, hx);
- hx = hex_asc_hi(bcberr);
- ptr = hex_byte_pack(ptr, hx);
- hx = hex_asc_lo(bcberr);
- ptr = hex_byte_pack(ptr, hx);
-
- ptr = mem2hex(crlf, ptr, sizeof(crlf) - 1, 0);
- *ptr = 0;
- putpacket(output_buffer); /* send it off... */
- }
-
- /*
- * tell the debugger that an exception has occurred
- */
- ptr = output_buffer;
-
- /*
- * Send trap type (converted to signal)
- */
- *ptr++ = 'T';
- ptr = hex_byte_pack(ptr, sigval);
-
- /*
- * Send Error PC
- */
- ptr = hex_byte_pack(ptr, GDB_REGID_PC);
- *ptr++ = ':';
- ptr = mem2hex(®s->pc, ptr, 4, 0);
- *ptr++ = ';';
-
- /*
- * Send frame pointer
- */
- ptr = hex_byte_pack(ptr, GDB_REGID_FP);
- *ptr++ = ':';
- ptr = mem2hex(®s->a3, ptr, 4, 0);
- *ptr++ = ';';
-
- /*
- * Send stack pointer
- */
- ssp = (unsigned long) (regs + 1);
- ptr = hex_byte_pack(ptr, GDB_REGID_SP);
- *ptr++ = ':';
- ptr = mem2hex(&ssp, ptr, 4, 0);
- *ptr++ = ';';
-
- *ptr++ = 0;
- putpacket(output_buffer); /* send it off... */
-
-packet_waiting:
- /*
- * Wait for input from remote GDB
- */
- while (1) {
- output_buffer[0] = 0;
- getpacket(input_buffer);
-
- switch (input_buffer[0]) {
- /* request repeat of last signal number */
- case '?':
- output_buffer[0] = 'S';
- output_buffer[1] = hex_asc_hi(sigval);
- output_buffer[2] = hex_asc_lo(sigval);
- output_buffer[3] = 0;
- break;
-
- case 'd':
- /* toggle debug flag */
- break;
-
- /*
- * Return the value of the CPU registers
- */
- case 'g':
- zero = 0;
- ssp = (u32) (regs + 1);
- ptr = output_buffer;
- ptr = mem2hex(®s->d0, ptr, 4, 0);
- ptr = mem2hex(®s->d1, ptr, 4, 0);
- ptr = mem2hex(®s->d2, ptr, 4, 0);
- ptr = mem2hex(®s->d3, ptr, 4, 0);
- ptr = mem2hex(®s->a0, ptr, 4, 0);
- ptr = mem2hex(®s->a1, ptr, 4, 0);
- ptr = mem2hex(®s->a2, ptr, 4, 0);
- ptr = mem2hex(®s->a3, ptr, 4, 0);
-
- ptr = mem2hex(&ssp, ptr, 4, 0); /* 8 */
- ptr = mem2hex(®s->pc, ptr, 4, 0);
- ptr = mem2hex(®s->mdr, ptr, 4, 0);
- ptr = mem2hex(®s->epsw, ptr, 4, 0);
- ptr = mem2hex(®s->lir, ptr, 4, 0);
- ptr = mem2hex(®s->lar, ptr, 4, 0);
- ptr = mem2hex(®s->mdrq, ptr, 4, 0);
-
- ptr = mem2hex(®s->e0, ptr, 4, 0); /* 15 */
- ptr = mem2hex(®s->e1, ptr, 4, 0);
- ptr = mem2hex(®s->e2, ptr, 4, 0);
- ptr = mem2hex(®s->e3, ptr, 4, 0);
- ptr = mem2hex(®s->e4, ptr, 4, 0);
- ptr = mem2hex(®s->e5, ptr, 4, 0);
- ptr = mem2hex(®s->e6, ptr, 4, 0);
- ptr = mem2hex(®s->e7, ptr, 4, 0);
-
- ptr = mem2hex(&ssp, ptr, 4, 0);
- ptr = mem2hex(®s, ptr, 4, 0);
- ptr = mem2hex(®s->sp, ptr, 4, 0);
- ptr = mem2hex(®s->mcrh, ptr, 4, 0); /* 26 */
- ptr = mem2hex(®s->mcrl, ptr, 4, 0);
- ptr = mem2hex(®s->mcvf, ptr, 4, 0);
-
- ptr = mem2hex(&gdbstub_fpcr, ptr, 4, 0); /* 29 - FPCR */
- ptr = mem2hex(&zero, ptr, 4, 0);
- ptr = mem2hex(&zero, ptr, 4, 0);
- for (loop = 0; loop < 32; loop++)
- ptr = mem2hex(&gdbstub_fpufs_array[loop],
- ptr, 4, 0); /* 32 - FS0-31 */
-
- break;
-
- /*
- * set the value of the CPU registers - return OK
- */
- case 'G':
- {
- const char *ptr;
-
- ptr = &input_buffer[1];
- ptr = hex2mem(ptr, ®s->d0, 4, 0);
- ptr = hex2mem(ptr, ®s->d1, 4, 0);
- ptr = hex2mem(ptr, ®s->d2, 4, 0);
- ptr = hex2mem(ptr, ®s->d3, 4, 0);
- ptr = hex2mem(ptr, ®s->a0, 4, 0);
- ptr = hex2mem(ptr, ®s->a1, 4, 0);
- ptr = hex2mem(ptr, ®s->a2, 4, 0);
- ptr = hex2mem(ptr, ®s->a3, 4, 0);
-
- ptr = hex2mem(ptr, &ssp, 4, 0); /* 8 */
- ptr = hex2mem(ptr, ®s->pc, 4, 0);
- ptr = hex2mem(ptr, ®s->mdr, 4, 0);
- ptr = hex2mem(ptr, ®s->epsw, 4, 0);
- ptr = hex2mem(ptr, ®s->lir, 4, 0);
- ptr = hex2mem(ptr, ®s->lar, 4, 0);
- ptr = hex2mem(ptr, ®s->mdrq, 4, 0);
-
- ptr = hex2mem(ptr, ®s->e0, 4, 0); /* 15 */
- ptr = hex2mem(ptr, ®s->e1, 4, 0);
- ptr = hex2mem(ptr, ®s->e2, 4, 0);
- ptr = hex2mem(ptr, ®s->e3, 4, 0);
- ptr = hex2mem(ptr, ®s->e4, 4, 0);
- ptr = hex2mem(ptr, ®s->e5, 4, 0);
- ptr = hex2mem(ptr, ®s->e6, 4, 0);
- ptr = hex2mem(ptr, ®s->e7, 4, 0);
-
- ptr = hex2mem(ptr, &ssp, 4, 0);
- ptr = hex2mem(ptr, &zero, 4, 0);
- ptr = hex2mem(ptr, ®s->sp, 4, 0);
- ptr = hex2mem(ptr, ®s->mcrh, 4, 0); /* 26 */
- ptr = hex2mem(ptr, ®s->mcrl, 4, 0);
- ptr = hex2mem(ptr, ®s->mcvf, 4, 0);
-
- ptr = hex2mem(ptr, &zero, 4, 0); /* 29 - FPCR */
- ptr = hex2mem(ptr, &zero, 4, 0);
- ptr = hex2mem(ptr, &zero, 4, 0);
- for (loop = 0; loop < 32; loop++) /* 32 - FS0-31 */
- ptr = hex2mem(ptr, &zero, 4, 0);
-
-#if 0
- /*
- * See if the stack pointer has moved. If so, then copy
- * the saved locals and ins to the new location.
- */
- unsigned long *newsp = (unsigned long *) registers[SP];
- if (sp != newsp)
- sp = memcpy(newsp, sp, 16 * 4);
-#endif
-
- gdbstub_strcpy(output_buffer, "OK");
- }
- break;
-
- /*
- * mAA..AA,LLLL Read LLLL bytes at address AA..AA
- */
- case 'm':
- ptr = &input_buffer[1];
-
- if (hexToInt(&ptr, &addr) &&
- *ptr++ == ',' &&
- hexToInt(&ptr, &length)
- ) {
- if (mem2hex((char *) addr, output_buffer,
- length, 1))
- break;
- gdbstub_strcpy(output_buffer, "E03");
- } else {
- gdbstub_strcpy(output_buffer, "E01");
- }
- break;
-
- /*
- * MAA..AA,LLLL: Write LLLL bytes at address AA.AA
- * return OK
- */
- case 'M':
- ptr = &input_buffer[1];
-
- if (hexToInt(&ptr, &addr) &&
- *ptr++ == ',' &&
- hexToInt(&ptr, &length) &&
- *ptr++ == ':'
- ) {
- if (hex2mem(ptr, (char *) addr, length, 1))
- gdbstub_strcpy(output_buffer, "OK");
- else
- gdbstub_strcpy(output_buffer, "E03");
-
- gdbstub_flush_caches = 1;
- } else {
- gdbstub_strcpy(output_buffer, "E02");
- }
- break;
-
- /*
- * cAA..AA Continue at address AA..AA(optional)
- */
- case 'c':
- /* try to read optional parameter, pc unchanged if no
- * parm */
-
- ptr = &input_buffer[1];
- if (hexToInt(&ptr, &addr))
- regs->pc = addr;
- goto done;
-
- /*
- * kill the program
- */
- case 'k' :
- goto done; /* just continue */
-
- /*
- * Reset the whole machine (FIXME: system dependent)
- */
- case 'r':
- break;
-
- /*
- * Step to next instruction
- */
- case 's':
- /* Using the T flag doesn't seem to perform single
- * stepping (it seems to wind up being caught by the
- * JTAG unit), so we have to use breakpoints and
- * continue instead.
- */
-#ifdef CONFIG_GDBSTUB_ALLOW_SINGLE_STEP
- if (gdbstub_single_step(regs) < 0)
- /* ignore any fault error for now */
- gdbstub_printk("unable to set single-step"
- " bp\n");
- goto done;
-#else
- gdbstub_strcpy(output_buffer, "E01");
- break;
-#endif
-
- /*
- * Set baud rate (bBB)
- */
- case 'b':
- do {
- int baudrate;
-
- ptr = &input_buffer[1];
- if (!hexToInt(&ptr, &baudrate)) {
- gdbstub_strcpy(output_buffer, "B01");
- break;
- }
-
- if (baudrate) {
- /* ACK before changing speed */
- putpacket("OK");
- gdbstub_io_set_baud(baudrate);
- }
- } while (0);
- break;
-
- /*
- * Set breakpoint
- */
- case 'Z':
- ptr = &input_buffer[1];
-
- if (!hexToInt(&ptr, &loop) || *ptr++ != ',' ||
- !hexToInt(&ptr, &addr) || *ptr++ != ',' ||
- !hexToInt(&ptr, &length)
- ) {
- gdbstub_strcpy(output_buffer, "E01");
- break;
- }
-
- /* only support software breakpoints */
- gdbstub_strcpy(output_buffer, "E03");
- if (loop != 0 ||
- length < 1 ||
- length > 7 ||
- (unsigned long) addr < 4096)
- break;
-
- if (gdbstub_set_breakpoint((u8 *) addr, length) < 0)
- break;
-
- gdbstub_strcpy(output_buffer, "OK");
- break;
-
- /*
- * Clear breakpoint
- */
- case 'z':
- ptr = &input_buffer[1];
-
- if (!hexToInt(&ptr, &loop) || *ptr++ != ',' ||
- !hexToInt(&ptr, &addr) || *ptr++ != ',' ||
- !hexToInt(&ptr, &length)
- ) {
- gdbstub_strcpy(output_buffer, "E01");
- break;
- }
-
- /* only support software breakpoints */
- gdbstub_strcpy(output_buffer, "E03");
- if (loop != 0 ||
- length < 1 ||
- length > 7 ||
- (unsigned long) addr < 4096)
- break;
-
- if (gdbstub_clear_breakpoint((u8 *) addr, length) < 0)
- break;
-
- gdbstub_strcpy(output_buffer, "OK");
- break;
-
- default:
- gdbstub_proto("### GDB Unsupported Cmd '%s'\n",
- input_buffer);
- break;
- }
-
- /* reply to the request */
- putpacket(output_buffer);
- }
-
-done:
- /*
- * 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.
- * NB: We flush both caches, just to be sure...
- */
- if (gdbstub_flush_caches)
- debugger_local_cache_flushinv();
-
- gdbstub_load_fpu();
- mn10300_set_gdbleds(0);
- if (excep == EXCEP_NMI)
- NMICR = NMICR_NMIF;
-
- touch_softlockup_watchdog();
-
- local_irq_restore(epsw);
- return 0;
-}
-
-/*
- * Determine if we hit a debugger special breakpoint that needs skipping over
- * automatically.
- */
-int at_debugger_breakpoint(struct pt_regs *regs)
-{
- return 0;
-}
-
-/*
- * handle event interception
- */
-asmlinkage int debugger_intercept(enum exception_code excep,
- int signo, int si_code, struct pt_regs *regs)
-{
- static u8 notfirst = 1;
- int ret;
-
- if (gdbstub_busy)
- gdbstub_printk("--> gdbstub reentered itself\n");
- gdbstub_busy = 1;
-
- if (notfirst) {
- unsigned long mdr;
- asm("mov mdr,%0" : "=d"(mdr));
-
- gdbstub_entry(
- "--> debugger_intercept(%p,%04x) [MDR=%lx PC=%lx]\n",
- regs, excep, mdr, regs->pc);
-
- gdbstub_entry(
- "PC: %08lx EPSW: %08lx SSP: %08lx mode: %s\n",
- regs->pc, regs->epsw, (unsigned long) &ret,
- user_mode(regs) ? "User" : "Super");
- gdbstub_entry(
- "d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n",
- regs->d0, regs->d1, regs->d2, regs->d3);
- gdbstub_entry(
- "a0: %08lx a1: %08lx a2: %08lx a3: %08lx\n",
- regs->a0, regs->a1, regs->a2, regs->a3);
- gdbstub_entry(
- "e0: %08lx e1: %08lx e2: %08lx e3: %08lx\n",
- regs->e0, regs->e1, regs->e2, regs->e3);
- gdbstub_entry(
- "e4: %08lx e5: %08lx e6: %08lx e7: %08lx\n",
- regs->e4, regs->e5, regs->e6, regs->e7);
- gdbstub_entry(
- "lar: %08lx lir: %08lx mdr: %08lx usp: %08lx\n",
- regs->lar, regs->lir, regs->mdr, regs->sp);
- gdbstub_entry(
- "cvf: %08lx crl: %08lx crh: %08lx drq: %08lx\n",
- regs->mcvf, regs->mcrl, regs->mcrh, regs->mdrq);
- gdbstub_entry(
- "threadinfo=%p task=%p)\n",
- current_thread_info(), current);
- } else {
- notfirst = 1;
- }
-
- ret = gdbstub(regs, excep);
-
- gdbstub_entry("<-- debugger_intercept()\n");
- gdbstub_busy = 0;
- return ret;
-}
-
-/*
- * handle the GDB stub itself causing an exception
- */
-asmlinkage void gdbstub_exception(struct pt_regs *regs,
- enum exception_code excep)
-{
- unsigned long mdr;
-
- asm("mov mdr,%0" : "=d"(mdr));
- gdbstub_entry("--> gdbstub exception({%p},%04x) [MDR=%lx]\n",
- regs, excep, mdr);
-
- while ((unsigned long) regs == 0xffffffff) {}
-
- /* handle guarded memory accesses where we know it might fault */
- if (regs->pc == (unsigned) gdbstub_read_byte_guard) {
- regs->pc = (unsigned) gdbstub_read_byte_cont;
- goto fault;
- }
-
- if (regs->pc == (unsigned) gdbstub_read_word_guard) {
- regs->pc = (unsigned) gdbstub_read_word_cont;
- goto fault;
- }
-
- if (regs->pc == (unsigned) gdbstub_read_dword_guard) {
- regs->pc = (unsigned) gdbstub_read_dword_cont;
- goto fault;
- }
-
- if (regs->pc == (unsigned) gdbstub_write_byte_guard) {
- regs->pc = (unsigned) gdbstub_write_byte_cont;
- goto fault;
- }
-
- if (regs->pc == (unsigned) gdbstub_write_word_guard) {
- regs->pc = (unsigned) gdbstub_write_word_cont;
- goto fault;
- }
-
- if (regs->pc == (unsigned) gdbstub_write_dword_guard) {
- regs->pc = (unsigned) gdbstub_write_dword_cont;
- goto fault;
- }
-
- gdbstub_printk("\n### GDB stub caused an exception ###\n");
-
- /* something went horribly wrong */
- console_verbose();
- show_registers(regs);
-
- panic("GDB Stub caused an unexpected exception - can't continue\n");
-
- /* we caught an attempt by the stub to access silly memory */
-fault:
- gdbstub_entry("<-- gdbstub exception() = EFAULT\n");
- regs->d0 = -EFAULT;
- return;
-}
-
-/*
- * send an exit message to GDB
- */
-void gdbstub_exit(int status)
-{
- unsigned char checksum;
- unsigned char ch;
- int count;
-
- gdbstub_busy = 1;
- output_buffer[0] = 'W';
- output_buffer[1] = hex_asc_hi(status);
- output_buffer[2] = hex_asc_lo(status);
- output_buffer[3] = 0;
-
- gdbstub_io_tx_char('$');
- checksum = 0;
- count = 0;
-
- while ((ch = output_buffer[count]) != 0) {
- gdbstub_io_tx_char(ch);
- checksum += ch;
- count += 1;
- }
-
- gdbstub_io_tx_char('#');
- gdbstub_io_tx_char(hex_asc_hi(checksum));
- gdbstub_io_tx_char(hex_asc_lo(checksum));
-
- /* make sure the output is flushed, or else RedBoot might clobber it */
- gdbstub_io_tx_flush();
-
- gdbstub_busy = 0;
-}
-
-/*
- * initialise the GDB stub
- */
-asmlinkage void __init gdbstub_init(void)
-{
-#ifdef CONFIG_GDBSTUB_IMMEDIATE
- unsigned char ch;
- int ret;
-#endif
-
- gdbstub_busy = 1;
-
- printk(KERN_INFO "%s", gdbstub_banner);
-
- gdbstub_io_init();
-
- gdbstub_entry("--> gdbstub_init\n");
-
- /* try to talk to GDB (or anyone insane enough to want to type GDB
- * protocol by hand) */
- gdbstub_io("### GDB Tx ACK\n");
- gdbstub_io_tx_char('+'); /* 'hello world' */
-
-#ifdef CONFIG_GDBSTUB_IMMEDIATE
- gdbstub_printk("GDB Stub waiting for packet\n");
-
- /* in case GDB is started before us, ACK any packets that are already
- * sitting there (presumably "$?#xx")
- */
- do { gdbstub_io_rx_char(&ch, 0); } while (ch != '$');
- do { gdbstub_io_rx_char(&ch, 0); } while (ch != '#');
- /* eat first csum byte */
- do { ret = gdbstub_io_rx_char(&ch, 0); } while (ret != 0);
- /* eat second csum byte */
- do { ret = gdbstub_io_rx_char(&ch, 0); } while (ret != 0);
-
- gdbstub_io("### GDB Tx NAK\n");
- gdbstub_io_tx_char('-'); /* NAK it */
-
-#else
- printk("GDB Stub ready\n");
-#endif
-
- gdbstub_busy = 0;
- gdbstub_entry("<-- gdbstub_init\n");
-}
-
-/*
- * register the console at a more appropriate time
- */
-#ifdef CONFIG_GDBSTUB_CONSOLE
-static int __init gdbstub_postinit(void)
-{
- printk(KERN_NOTICE "registering console\n");
- register_console(&gdbstub_console);
- return 0;
-}
-
-__initcall(gdbstub_postinit);
-#endif
-
-/*
- * handle character reception on GDB serial port
- * - jump into the GDB stub if BREAK is detected on the serial line
- */
-asmlinkage void gdbstub_rx_irq(struct pt_regs *regs, enum exception_code excep)
-{
- char ch;
- int ret;
-
- gdbstub_entry("--> gdbstub_rx_irq\n");
-
- do {
- ret = gdbstub_io_rx_char(&ch, 1);
- if (ret != -EIO && ret != -EAGAIN) {
- if (ret != -EINTR)
- gdbstub_rx_unget = ch;
- gdbstub(regs, excep);
- }
- } while (ret != -EAGAIN);
-
- gdbstub_entry("<-- gdbstub_rx_irq\n");
-}
diff --git a/arch/mn10300/kernel/head.S b/arch/mn10300/kernel/head.S
index 73e00fc78072..d1bf8ce82f22 100644
--- a/arch/mn10300/kernel/head.S
+++ b/arch/mn10300/kernel/head.S
@@ -289,16 +289,6 @@ wait_on_secondary_boot:
bne loop_request_boot_secondary
#endif /* CONFIG_SMP */
-#ifdef CONFIG_GDBSTUB
- call gdbstub_init[],0
-
-#ifdef CONFIG_GDBSTUB_IMMEDIATE
- .globl __gdbstub_pause
-__gdbstub_pause:
- bra __gdbstub_pause
-#endif
-#endif
-
jmp start_kernel
.size _start,.-_start
diff --git a/arch/mn10300/kernel/mn10300-watchdog.c b/arch/mn10300/kernel/mn10300-watchdog.c
index a2d8e6938d67..8d34d05d91c0 100644
--- a/arch/mn10300/kernel/mn10300-watchdog.c
+++ b/arch/mn10300/kernel/mn10300-watchdog.c
@@ -148,12 +148,7 @@ void watchdog_interrupt(struct pt_regs *regs, enum exception_code excep)
sum = irq_stat[cpu].__irq_count;
- if ((last_irq_sums[cpu] == sum)
-#if defined(CONFIG_GDBSTUB) && defined(CONFIG_SMP)
- && !(CHK_GDBSTUB_BUSY()
- || atomic_read(&cpu_doing_single_step))
-#endif
- ) {
+ if (last_irq_sums[cpu] == sum) {
/*
* Ayiee, looks like this CPU is stuck ...
* wait a few IRQs (5 seconds) before doing the oops ...
@@ -184,12 +179,6 @@ void watchdog_interrupt(struct pt_regs *regs, enum exception_code excep)
console_silent();
spin_unlock(&watchdog_print_lock);
bust_spinlocks(0);
-#ifdef CONFIG_GDBSTUB
- if (CHK_GDBSTUB_BUSY_AND_ACTIVE())
- gdbstub_exception(regs, excep);
- else
- gdbstub_intercept(regs, excep);
-#endif
do_exit(SIGSEGV);
}
} else {
diff --git a/arch/mn10300/kernel/smp-low.S b/arch/mn10300/kernel/smp-low.S
index 71f1b2faaa0b..953238822dcd 100644
--- a/arch/mn10300/kernel/smp-low.S
+++ b/arch/mn10300/kernel/smp-low.S
@@ -43,11 +43,7 @@ mn10300_low_ipi_handler:
/* OTHERS */
mov (sp),d0
add 4,sp
-#ifdef CONFIG_GDBSTUB
- jmp gdbstub_io_rx_handler
-#else
jmp end
-#endif
###############################################################################
#
diff --git a/arch/mn10300/kernel/smp.c b/arch/mn10300/kernel/smp.c
index f984193718b1..b0848bd10ad2 100644
--- a/arch/mn10300/kernel/smp.c
+++ b/arch/mn10300/kernel/smp.c
@@ -471,13 +471,6 @@ void stop_this_cpu(void *unused)
static volatile int stopflag;
unsigned long flags;
-#ifdef CONFIG_GDBSTUB
- /* In case of single stepping smp_send_stop by other CPU,
- * clear procindebug to avoid deadlock.
- */
- atomic_set(&procindebug[smp_processor_id()], 0);
-#endif /* CONFIG_GDBSTUB */
-
flags = arch_local_cli_save();
set_cpu_online(smp_processor_id(), false);
diff --git a/arch/mn10300/mm/fault.c b/arch/mn10300/mm/fault.c
index 3516cbdf1ee9..549a13de8cee 100644
--- a/arch/mn10300/mm/fault.c
+++ b/arch/mn10300/mm/fault.c
@@ -126,14 +126,6 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long fault_code,
int fault;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
-#ifdef CONFIG_GDBSTUB
- /* handle GDB stub causing a fault */
- if (gdbstub_busy) {
- gdbstub_exception(regs, TBR & TBR_INT_CODE);
- return;
- }
-#endif
-
#if 0
printk(KERN_DEBUG "--- do_page_fault(%p,%s:%04lx,%08lx)\n",
regs,
diff --git a/arch/mn10300/mm/tlb-mn10300.S b/arch/mn10300/mm/tlb-mn10300.S
index b9940177d81b..f8a3bd554ad3 100644
--- a/arch/mn10300/mm/tlb-mn10300.S
+++ b/arch/mn10300/mm/tlb-mn10300.S
@@ -27,15 +27,11 @@
###############################################################################
.type itlb_miss,@function
ENTRY(itlb_miss)
-#ifdef CONFIG_GDBSTUB
- movm [d2,d3,a2],(sp)
-#else
or EPSW_nAR,epsw # switch D0-D3 & A0-A3 to the alternate
# register bank
nop
nop
nop
-#endif
#if defined(CONFIG_ERRATUM_NEED_TO_RELOAD_MMUCTR)
mov (MMUCTR),d2
@@ -71,9 +67,6 @@ ENTRY(itlb_miss)
and ~xPTEL2_UNUSED1,d2
itlb_miss_set:
mov d2,(IPTEL2) # change the TLB
-#ifdef CONFIG_GDBSTUB
- movm (sp),[d2,d3,a2]
-#endif
rti
itlb_miss_fault:
@@ -90,15 +83,11 @@ itlb_miss_fault:
###############################################################################
.type dtlb_miss,@function
ENTRY(dtlb_miss)
-#ifdef CONFIG_GDBSTUB
- movm [d2,d3,a2],(sp)
-#else
or EPSW_nAR,epsw # switch D0-D3 & A0-A3 to the alternate
# register bank
nop
nop
nop
-#endif
#if defined(CONFIG_ERRATUM_NEED_TO_RELOAD_MMUCTR)
mov (MMUCTR),d2
@@ -134,9 +123,6 @@ ENTRY(dtlb_miss)
and ~xPTEL2_UNUSED1,d2
dtlb_miss_set:
mov d2,(DPTEL2) # change the TLB
-#ifdef CONFIG_GDBSTUB
- movm (sp),[d2,d3,a2]
-#endif
rti
dtlb_miss_fault:
--
1.9.3
--
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