sh-lite.patch

Linux-2.6.18内核调试工具补丁程序KGDB。

-
Index: linux-2.6.16/arch/sh/Kconfig.debug
===================================================================
--- linux-2.6.16.orig/arch/sh/Kconfig.debug	2006-03-20 11:23:29.000000000 +0530
+++ linux-2.6.16/arch/sh/Kconfig.debug	2006-04-25 11:34:01.000000000 +0530
@@ -29,96 +29,4 @@
 	  This option is only useful porting the kernel to a new machine,
 	  when the kernel may crash or hang before the serial console is
 	  initialised. If unsure, say N.
-
-config KGDB
-	bool "Include KGDB kernel debugger"
-	help
-	  Include in-kernel hooks for kgdb, the Linux kernel source level
-	  debugger.  See <http://kgdb.sourceforge.net/> for more information.
-	  Unless you are intending to debug the kernel, say N here.
-
-menu "KGDB configuration options"
-	depends on KGDB
-
-config MORE_COMPILE_OPTIONS
-	bool "Add any additional compile options"
-	help
-	  If you want to add additional CFLAGS to the kernel build, enable this
-	  option and then enter what you would like to add in the next question.
-	  Note however that -g is already appended with the selection of KGDB.
-
-config COMPILE_OPTIONS
-	string "Additional compile arguments"
-	depends on MORE_COMPILE_OPTIONS
-
-config KGDB_NMI
-	bool "Enter KGDB on NMI"
-	default n
-
-config KGDB_THREAD
-	bool "Include KGDB thread support"
-	default y
-
-config SH_KGDB_CONSOLE
-	bool "Console messages through GDB"
-	default n
-
-config KGDB_SYSRQ
-	bool "Allow SysRq 'G' to enter KGDB"
-	default y
-
-config KGDB_KERNEL_ASSERTS
-	bool "Include KGDB kernel assertions"
-	default n
-
-comment "Serial port setup"
-
-config KGDB_DEFPORT
-	int "Port number (ttySCn)"
-	default "1"
-
-config KGDB_DEFBAUD
-	int "Baud rate"
-	default "115200"
-
-choice
-	prompt "Parity"
-	depends on KGDB
-	default KGDB_DEFPARITY_N
-
-config KGDB_DEFPARITY_N
-	bool "None"
-
-config KGDB_DEFPARITY_E
-	bool "Even"
-
-config KGDB_DEFPARITY_O
-	bool "Odd"
-
-endchoice
-
-choice
-	prompt "Data bits"
-	depends on KGDB
-	default KGDB_DEFBITS_8
-
-config KGDB_DEFBITS_8
-	bool "8"
-
-config KGDB_DEFBITS_7
-	bool "7"
-
-endchoice
-
-endmenu
-
-config FRAME_POINTER
-	bool "Compile the kernel with frame pointers"
-	default y if KGDB
-	help
-	  If you say Y here the resulting kernel image will be slightly larger
-	  and slower, but it will give very useful debugging information.
-	  If you don't debug the kernel, you can say N, but we may not be able
-	  to solve problems without frame pointers.
-
 endmenu
Index: linux-2.6.16/arch/sh/Makefile
===================================================================
--- linux-2.6.16.orig/arch/sh/Makefile	2006-03-20 11:23:29.000000000 +0530
+++ linux-2.6.16/arch/sh/Makefile	2006-04-25 11:34:01.000000000 +0530
@@ -43,7 +43,6 @@
 cflags-$(CONFIG_CPU_SH4A)		+= $(call cc-option,-m4a-nofpu,)
 
 cflags-$(CONFIG_SH_DSP)			+= -Wa,-dsp
-cflags-$(CONFIG_SH_KGDB)		+= -g
 
 cflags-$(CONFIG_MORE_COMPILE_OPTIONS)	+= \
 	$(shell echo $(CONFIG_COMPILE_OPTIONS) | sed -e 's/"//g')
Index: linux-2.6.16/arch/sh/boards/se/7751/setup.c
===================================================================
--- linux-2.6.16.orig/arch/sh/boards/se/7751/setup.c	2006-03-20 11:23:29.000000000 +0530
+++ linux-2.6.16/arch/sh/boards/se/7751/setup.c	2006-04-25 11:34:01.000000000 +0530
@@ -18,10 +18,6 @@
 #include <asm/io.h>
 #include <asm/se7751/se7751.h>
 
-#ifdef CONFIG_SH_KGDB
-#include <asm/kgdb.h>
-#endif
-
 /*
  * Configure the Super I/O chip
  */
@@ -83,12 +79,6 @@
 	return "7751 SolutionEngine";
 }
 
-#ifdef CONFIG_SH_KGDB
-static int kgdb_uart_setup(void);
-static struct kgdb_sermap kgdb_uart_sermap = 
-{ "ttyS", 0, kgdb_uart_setup, NULL };
-#endif
- 
 /*
  * Initialize the board
  */
@@ -96,133 +86,4 @@
 {
 	/* Call init_smsc() replacement to set up SuperIO. */
 	/* XXX: RTC setting comes here */
-#ifdef CONFIG_SH_KGDB
-	kgdb_register_sermap(&kgdb_uart_sermap);
-#endif
-}
-
-/*********************************************************************
- * Currently a hack (e.g. does not interact well w/serial.c, lots of *
- * hardcoded stuff) but may be useful if SCI/F needs debugging.      *
- * Mostly copied from x86 code (see files asm-i386/kgdb_local.h and  *
- * arch/i386/lib/kgdb_serial.c).                                     *
- *********************************************************************/
-
-#ifdef CONFIG_SH_KGDB
-#include <linux/types.h>
-#include <linux/serial.h>
-#include <linux/serialP.h>
-#include <linux/serial_reg.h>
-
-#define COM1_PORT 0x3f8  /* Base I/O address */
-#define COM1_IRQ  4      /* IRQ not used yet */
-#define COM2_PORT 0x2f8  /* Base I/O address */
-#define COM2_IRQ  3      /* IRQ not used yet */
-
-#define SB_CLOCK 1843200 /* Serial baud clock */
-#define SB_BASE (SB_CLOCK/16)
-#define SB_MCR UART_MCR_OUT2 | UART_MCR_DTR | UART_MCR_RTS
-
-struct uart_port {
-	int base;
-};
-#define UART_NPORTS 2
-struct uart_port uart_ports[] = {
-	{ COM1_PORT },
-	{ COM2_PORT },
-};
-struct uart_port *kgdb_uart_port;
-
-#define UART_IN(reg)	inb_p(kgdb_uart_port->base + reg)
-#define UART_OUT(reg,v)	outb_p((v), kgdb_uart_port->base + reg)
-
-/* Basic read/write functions for the UART */
-#define UART_LSR_RXCERR    (UART_LSR_BI | UART_LSR_FE | UART_LSR_PE)
-static int kgdb_uart_getchar(void)
-{
-	int lsr;
-	int c = -1;
-
-	while (c == -1) {
-		lsr = UART_IN(UART_LSR);
-		if (lsr & UART_LSR_DR) 
-			c = UART_IN(UART_RX);
-		if ((lsr & UART_LSR_RXCERR))
-			c = -1;
-	}
-	return c;
-}
-
-static void kgdb_uart_putchar(int c)
-{
-	while ((UART_IN(UART_LSR) & UART_LSR_THRE) == 0)
-		;
-	UART_OUT(UART_TX, c);
-}
-
-/*
- * Initialize UART to configured/requested values.
- * (But we don't interrupts yet, or interact w/serial.c)
- */
-static int kgdb_uart_setup(void)
-{
-	int port;
-	int lcr = 0;
-	int bdiv = 0;
-
-	if (kgdb_portnum >= UART_NPORTS) {
-		KGDB_PRINTK("uart port %d invalid.\n", kgdb_portnum);
-		return -1;
-	}
-
-	kgdb_uart_port = &uart_ports[kgdb_portnum];
-
-	/* Init sequence from gdb_hook_interrupt */
-	UART_IN(UART_RX);
-	UART_OUT(UART_IER, 0);
-
-	UART_IN(UART_RX);	/* Serial driver comments say */
-	UART_IN(UART_IIR);	/* this clears interrupt regs */
-	UART_IN(UART_MSR);
-
-	/* Figure basic LCR values */
-	switch (kgdb_bits) {
-	case '7':
-		lcr |= UART_LCR_WLEN7;
-		break;
-	default: case '8': 
-		lcr |= UART_LCR_WLEN8;
-		break;
-	}
-	switch (kgdb_parity) {
-	case 'O':
-		lcr |= UART_LCR_PARITY;
-		break;
-	case 'E':
-		lcr |= (UART_LCR_PARITY | UART_LCR_EPAR);
-		break;
-	default: break;
-	}
-
-	/* Figure the baud rate divisor */
-	bdiv = (SB_BASE/kgdb_baud);
-	
-	/* Set the baud rate and LCR values */
-	UART_OUT(UART_LCR, (lcr | UART_LCR_DLAB));
-	UART_OUT(UART_DLL, (bdiv & 0xff));
-	UART_OUT(UART_DLM, ((bdiv >> 8) & 0xff));
-	UART_OUT(UART_LCR, lcr);
-
-	/* Set the MCR */
-	UART_OUT(UART_MCR, SB_MCR);
-
-	/* Turn off FIFOs for now */
-	UART_OUT(UART_FCR, 0);
-
-	/* Setup complete: initialize function pointers */
-	kgdb_getchar = kgdb_uart_getchar;
-	kgdb_putchar = kgdb_uart_putchar;
-
-	return 0;
 }
-#endif /* CONFIG_SH_KGDB */
Index: linux-2.6.16/arch/sh/mm/extable.c
===================================================================
--- linux-2.6.16.orig/arch/sh/mm/extable.c	2006-03-20 11:23:29.000000000 +0530
+++ linux-2.6.16/arch/sh/mm/extable.c	2006-04-25 11:34:01.000000000 +0530
@@ -6,6 +6,7 @@
 
 #include <linux/config.h>
 #include <linux/module.h>
+#include <linux/kgdb.h>
 #include <asm/uaccess.h>
 
 int fixup_exception(struct pt_regs *regs)
@@ -17,6 +18,12 @@
 		regs->pc = fixup->fixup;
 		return 1;
 	}
+#ifdef CONFIG_KGDB
+	if (atomic_read(&debugger_active) && kgdb_may_fault)
+		/* Restore our previous state. */
+		kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+		/* Never reached. */
+#endif
 
 	return 0;
 }
Index: linux-2.6.16/arch/sh/mm/fault.c
===================================================================
--- linux-2.6.16.orig/arch/sh/mm/fault.c	2006-03-20 11:23:29.000000000 +0530
+++ linux-2.6.16/arch/sh/mm/fault.c	2006-04-25 11:34:01.000000000 +0530
@@ -28,7 +28,6 @@
 #include <asm/pgalloc.h>
 #include <asm/mmu_context.h>
 #include <asm/cacheflush.h>
-#include <asm/kgdb.h>
 
 extern void die(const char *,struct pt_regs *,long);
 
@@ -45,11 +44,6 @@
 	struct vm_area_struct * vma;
 	unsigned long page;
 
-#ifdef CONFIG_SH_KGDB
-	if (kgdb_nofault && kgdb_bus_err_hook)
-		kgdb_bus_err_hook();
-#endif
-
 	tsk = current;
 	mm = tsk->mm;
 
@@ -153,6 +147,7 @@
 	}
 	die("Oops", regs, writeaccess);
 	do_exit(SIGKILL);
+	dump_stack();
 
 /*
  * We ran out of memory, or some other thing happened to us that made
@@ -202,11 +197,6 @@
 	spinlock_t *ptl;
 	int ret = 1;
 
-#ifdef CONFIG_SH_KGDB
-	if (kgdb_nofault && kgdb_bus_err_hook)
-		kgdb_bus_err_hook();
-#endif
-
 #ifdef CONFIG_SH_STORE_QUEUES
 	addrmax = P4SEG_STORE_QUE + 0x04000000;
 #endif
Index: linux-2.6.16/arch/sh/mm/fault-nommu.c
===================================================================
--- linux-2.6.16.orig/arch/sh/mm/fault-nommu.c	2006-03-20 11:23:29.000000000 +0530
+++ linux-2.6.16/arch/sh/mm/fault-nommu.c	2006-04-25 11:34:01.000000000 +0530
@@ -29,10 +29,6 @@
 #include <asm/mmu_context.h>
 #include <asm/cacheflush.h>
 
-#if defined(CONFIG_SH_KGDB)
-#include <asm/kgdb.h>
-#endif
-
 extern void die(const char *,struct pt_regs *,long);
 
 /*
@@ -43,11 +39,6 @@
 asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
 			      unsigned long address)
 {
-#if defined(CONFIG_SH_KGDB)
-	if (kgdb_nofault && kgdb_bus_err_hook)
-		kgdb_bus_err_hook();
-#endif
-
 	/*
 	 * Oops. The kernel tried to access some bad page. We'll have to
 	 * terminate things with extreme prejudice.
@@ -69,11 +60,6 @@
 asmlinkage int __do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
 			       unsigned long address)
 {
-#if defined(CONFIG_SH_KGDB)
-	if (kgdb_nofault && kgdb_bus_err_hook)
-		kgdb_bus_err_hook();
-#endif
-
 	if (address >= TASK_SIZE)
 		return 1;
 
Index: linux-2.6.16/arch/sh/kernel/kgdb-jmp.S
===================================================================
--- linux-2.6.16.orig/arch/sh/kernel/kgdb-jmp.S	2006-04-25 10:59:23.506518750 +0530
+++ linux-2.6.16/arch/sh/kernel/kgdb-jmp.S	2006-04-25 11:34:01.000000000 +0530
@@ -0,0 +1,32 @@
+#include <linux/linkage.h>
+
+ENTRY(kgdb_fault_setjmp)
+	add	#(9*4), r4
+	sts.l	pr, @-r4
+	mov.l	r15, @-r4
+	mov.l	r14, @-r4
+	mov.l	r13, @-r4
+	mov.l	r12, @-r4
+	mov.l	r11, @-r4
+	mov.l	r10, @-r4
+	mov.l	r9, @-r4
+	mov.l	r8, @-r4
+	rts
+	 mov	#0, r0
+
+ENTRY(kgdb_fault_longjmp)
+	mov.l	@r4+, r8
+	mov.l	@r4+, r9
+	mov.l	@r4+, r10
+	mov.l	@r4+, r11
+	mov.l	@r4+, r12
+	mov.l	@r4+, r13
+	mov.l	@r4+, r14
+	mov.l	@r4+, r15
+	lds.l	@r4+, pr
+	mov	r5, r0
+	tst	r0, r0
+	bf	1f
+	mov	#1, r0
+1:	rts
+	 nop
Index: linux-2.6.16/arch/sh/kernel/kgdb_stub.c
===================================================================
--- linux-2.6.16.orig/arch/sh/kernel/kgdb_stub.c	2006-03-20 11:23:29.000000000 +0530
+++ linux-2.6.16/arch/sh/kernel/kgdb_stub.c	2006-04-25 10:59:23.506518750 +0530
@@ -1,1491 +0,0 @@
-/*
- * May be copied or modified under the terms of the GNU General Public
- * License.  See linux/COPYING for more information.
- *
- * Containes extracts from code by Glenn Engel, Jim Kingdon,
- * David Grothe <[e-mail]>, Tigran Aivazian <[e-mail]>,
- * Amit S. Kale <[e-mail]>,  William Gatliff <[e-mail]>,
- * Ben Lee, Steve Chamberlain and Benoit Miller <[e-mail]>.
- * 
- * This version by Henry Bell <[e-mail]>
- * Minor modifications by Jeremy Siegel <[e-mail]>
- * 
- * Contains low-level support for remote debug using GDB. 
- *
- * To enable debugger support, two things need to happen. 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.
- * A breakpoint also needs to be generated to begin communication.  This
- * is most easily accomplished by a call to breakpoint() which does
- * a trapa if the initialisation phase has been successfully completed.
- *
- * In this case, set_debug_traps() is not used to "take over" exceptions;
- * other kernel code is modified instead to enter the kgdb functions here
- * when appropriate (see entry.S for breakpoint traps and NMI interrupts,
- * see traps.c for kernel error exceptions).
- *
- * 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
- *    XAA..AA,LLLL: Same, but data is binary (not hex)     OK or ENN
- *
- *    c             Resume at current address              SNN   ( signal NN)
- *    cAA..AA       Continue at address AA..AA             SNN
- *    CNN;          Resume at current address with signal  SNN
- *    CNN;AA..AA    Resume at address AA..AA with signal   SNN
- *
- *    s             Step one instruction                   SNN
- *    sAA..AA       Step one instruction from AA..AA       SNN
- *    SNN;          Step one instruction with signal       SNN
- *    SNNAA..AA     Step one instruction from AA..AA w/NN  SNN
- *
- *    k             kill (Detach GDB)
- *
- *    d             Toggle debug flag
- *    D             Detach GDB 
- *
- *    Hct           Set thread t for operations,           OK or ENN
- *                  c = 'c' (step, cont), c = 'g' (other
- *                  operations)
- *
- *    qC            Query current thread ID                QCpid
- *    qfThreadInfo  Get list of current threads (first)    m<id>
- *    qsThreadInfo   "    "  "     "      "   (subsequent)
- *    qOffsets      Get section offsets                  Text=x;Data=y;Bss=z
- * 
- *    TXX           Find if thread XX is alive             OK or ENN
- *    ?             What was the last sigval ?             SNN   (signal NN)
- *    O             Output to GDB console
- *
- * Remote communication protocol.
- *
- *    A debug packet whose contents are <data> is encapsulated for
- *    transmission in the form: