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Commit 5f857bce authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: Consolidate die definitions for trap handlers. 



This kills off the _64 versions and consolidates on the more robust _32
versions instead.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 37c9ee01

arch/sh/include/asm/bug.h

+4 −0
Original line number Diff line number Diff line
@@ -110,6 +110,10 @@ do { \ 
#include <asm-generic/bug.h>



struct pt_regs;



/* arch/sh/kernel/traps.c */

extern void die(const char *str, struct pt_regs *regs, long err) __attribute__ ((noreturn));

extern void die_if_kernel(const char *str, struct pt_regs *regs, long err);

extern void die_if_no_fixup(const char *str, struct pt_regs *regs, long err);



#endif /* __ASM_SH_BUG_H */

arch/sh/kernel/traps.c

+71 −0
Original line number Diff line number Diff line
@@ -6,9 +6,80 @@ 
#include <linux/sched.h>

#include <linux/uaccess.h>

#include <linux/hardirq.h>

#include <linux/kernel.h>

#include <linux/kexec.h>

#include <linux/module.h>

#include <asm/unwinder.h>

#include <asm/traps.h>



static DEFINE_SPINLOCK(die_lock);



void die(const char *str, struct pt_regs *regs, long err)

{

	static int die_counter;



	oops_enter();



	spin_lock_irq(&die_lock);

	console_verbose();

	bust_spinlocks(1);



	printk("%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);

	print_modules();

	show_regs(regs);



	printk("Process: %s (pid: %d, stack limit = %p)\n", current->comm,

			task_pid_nr(current), task_stack_page(current) + 1);



	if (!user_mode(regs) || in_interrupt())

		dump_mem("Stack: ", regs->regs[15], THREAD_SIZE +

			 (unsigned long)task_stack_page(current));



	notify_die(DIE_OOPS, str, regs, err, 255, SIGSEGV);



	bust_spinlocks(0);

	add_taint(TAINT_DIE);

	spin_unlock_irq(&die_lock);

	oops_exit();



	if (kexec_should_crash(current))

		crash_kexec(regs);



	if (in_interrupt())

		panic("Fatal exception in interrupt");



	if (panic_on_oops)

		panic("Fatal exception");



	do_exit(SIGSEGV);

}



void die_if_kernel(const char *str, struct pt_regs *regs, long err)

{

	if (!user_mode(regs))

		die(str, regs, err);

}



/*

 * try and fix up kernelspace address errors

 * - userspace errors just cause EFAULT to be returned, resulting in SEGV

 * - kernel/userspace interfaces cause a jump to an appropriate handler

 * - other kernel errors are bad

 */

void die_if_no_fixup(const char *str, struct pt_regs *regs, long err)

{

	if (!user_mode(regs)) {

		const struct exception_table_entry *fixup;

		fixup = search_exception_tables(regs->pc);

		if (fixup) {

			regs->pc = fixup->fixup;

			return;

		}



		die(str, regs, err);

	}

}



#ifdef CONFIG_GENERIC_BUG

static void handle_BUG(struct pt_regs *regs)

{

arch/sh/kernel/traps_32.c

+0 −71
Original line number Diff line number Diff line
@@ -16,13 +16,11 @@ 
#include <linux/hardirq.h>

#include <linux/init.h>

#include <linux/spinlock.h>

#include <linux/module.h>

#include <linux/kallsyms.h>

#include <linux/io.h>

#include <linux/bug.h>

#include <linux/debug_locks.h>

#include <linux/kdebug.h>

#include <linux/kexec.h>

#include <linux/limits.h>

#include <linux/sysfs.h>

#include <linux/uaccess.h>
@@ -48,75 +46,6 @@ 
#define TRAP_ILLEGAL_SLOT_INST	13

#endif



static DEFINE_SPINLOCK(die_lock);



void die(const char * str, struct pt_regs * regs, long err)

{

	static int die_counter;



	oops_enter();



	spin_lock_irq(&die_lock);

	console_verbose();

	bust_spinlocks(1);



	printk("%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);

	print_modules();

	show_regs(regs);



	printk("Process: %s (pid: %d, stack limit = %p)\n", current->comm,

			task_pid_nr(current), task_stack_page(current) + 1);



	if (!user_mode(regs) || in_interrupt())

		dump_mem("Stack: ", regs->regs[15], THREAD_SIZE +

			 (unsigned long)task_stack_page(current));



	notify_die(DIE_OOPS, str, regs, err, 255, SIGSEGV);



	bust_spinlocks(0);

	add_taint(TAINT_DIE);

	spin_unlock_irq(&die_lock);

	oops_exit();



	if (kexec_should_crash(current))

		crash_kexec(regs);



	if (in_interrupt())

		panic("Fatal exception in interrupt");



	if (panic_on_oops)

		panic("Fatal exception");



	do_exit(SIGSEGV);

}



static inline void die_if_kernel(const char *str, struct pt_regs *regs,

				 long err)

{

	if (!user_mode(regs))

		die(str, regs, err);

}



/*

 * try and fix up kernelspace address errors

 * - userspace errors just cause EFAULT to be returned, resulting in SEGV

 * - kernel/userspace interfaces cause a jump to an appropriate handler

 * - other kernel errors are bad

 */

static void die_if_no_fixup(const char * str, struct pt_regs * regs, long err)

{

	if (!user_mode(regs)) {

		const struct exception_table_entry *fixup;

		fixup = search_exception_tables(regs->pc);

		if (fixup) {

			regs->pc = fixup->fixup;

			return;

		}



		die(str, regs, err);

	}

}



static inline void sign_extend(unsigned int count, unsigned char *dst)

{

#ifdef __LITTLE_ENDIAN__

arch/sh/kernel/traps_64.c

+0 −31
Original line number Diff line number Diff line
@@ -41,37 +41,6 @@ asmlinkage void do_##name(unsigned long error_code, struct pt_regs *regs) \ 
	do_unhandled_exception(trapnr, signr, str, __stringify(name), error_code, regs, current); \

}



static DEFINE_SPINLOCK(die_lock);



void die(const char * str, struct pt_regs * regs, long err)

{

	console_verbose();

	spin_lock_irq(&die_lock);

	printk("%s: %lx\n", str, (err & 0xffffff));

	show_regs(regs);

	spin_unlock_irq(&die_lock);

	do_exit(SIGSEGV);

}



static inline void die_if_kernel(const char * str, struct pt_regs * regs, long err)

{

	if (!user_mode(regs))

		die(str, regs, err);

}



static void die_if_no_fixup(const char * str, struct pt_regs * regs, long err)

{

	if (!user_mode(regs)) {

		const struct exception_table_entry *fixup;

		fixup = search_exception_tables(regs->pc);

		if (fixup) {

			regs->pc = fixup->fixup;

			return;

		}

		die(str, regs, err);

	}

}



DO_ERROR(13, SIGILL,  "illegal slot instruction", illegal_slot_inst, current)

DO_ERROR(87, SIGSEGV, "address error (exec)", address_error_exec, current)