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-rw-r--r--arch/sh/kernel/traps.c167
1 files changed, 94 insertions, 73 deletions
diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c
index c2c597e09482..53dfa55f3156 100644
--- a/arch/sh/kernel/traps.c
+++ b/arch/sh/kernel/traps.c
@@ -1,38 +1,25 @@
-/* $Id: traps.c,v 1.17 2004/05/02 01:46:30 sugioka Exp $
- *
- * linux/arch/sh/traps.c
+/*
+ * 'traps.c' handles hardware traps and faults after we have saved some
+ * state in 'entry.S'.
*
* SuperH version: Copyright (C) 1999 Niibe Yutaka
* Copyright (C) 2000 Philipp Rumpf
* Copyright (C) 2000 David Howells
- * Copyright (C) 2002, 2003 Paul Mundt
- */
-
-/*
- * 'Traps.c' handles hardware traps and faults after we have saved some
- * state in 'entry.S'.
+ * Copyright (C) 2002 - 2006 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
*/
-#include <linux/sched.h>
#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/errno.h>
#include <linux/ptrace.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/smp_lock.h>
#include <linux/init.h>
-#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/module.h>
#include <linux/kallsyms.h>
-
+#include <linux/io.h>
#include <asm/system.h>
#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <asm/atomic.h>
-#include <asm/processor.h>
-#include <asm/sections.h>
#ifdef CONFIG_SH_KGDB
#include <asm/kgdb.h>
@@ -53,13 +40,32 @@
#define TRAP_ILLEGAL_SLOT_INST 13
#endif
-/*
- * These constants are for searching for possible module text
- * segments. VMALLOC_OFFSET comes from mm/vmalloc.c; MODULE_RANGE is
- * a guess of how much space is likely to be vmalloced.
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define MODULE_RANGE (8*1024*1024)
+static void dump_mem(const char *str, unsigned long bottom, unsigned long top)
+{
+ unsigned long p;
+ int i;
+
+ printk("%s(0x%08lx to 0x%08lx)\n", str, bottom, top);
+
+ for (p = bottom & ~31; p < top; ) {
+ printk("%04lx: ", p & 0xffff);
+
+ for (i = 0; i < 8; i++, p += 4) {
+ unsigned int val;
+
+ if (p < bottom || p >= top)
+ printk(" ");
+ else {
+ if (__get_user(val, (unsigned int __user *)p)) {
+ printk("\n");
+ return;
+ }
+ printk("%08x ", val);
+ }
+ }
+ printk("\n");
+ }
+}
DEFINE_SPINLOCK(die_lock);
@@ -69,14 +75,28 @@ void die(const char * str, struct pt_regs * regs, long err)
console_verbose();
spin_lock_irq(&die_lock);
+ bust_spinlocks(1);
+
printk("%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
+
CHK_REMOTE_DEBUG(regs);
+ print_modules();
show_regs(regs);
+
+ printk("Process: %s (pid: %d, stack limit = %p)\n",
+ current->comm, current->pid, 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));
+
+ bust_spinlocks(0);
spin_unlock_irq(&die_lock);
do_exit(SIGSEGV);
}
-static inline void die_if_kernel(const char * str, struct pt_regs * regs, long err)
+static inline void die_if_kernel(const char *str, struct pt_regs *regs,
+ long err)
{
if (!user_mode(regs))
die(str, regs, err);
@@ -93,8 +113,7 @@ static int handle_unaligned_notify_count = 10;
*/
static int die_if_no_fixup(const char * str, struct pt_regs * regs, long err)
{
- if (!user_mode(regs))
- {
+ if (!user_mode(regs)) {
const struct exception_table_entry *fixup;
fixup = search_exception_tables(regs->pc);
if (fixup) {
@@ -550,7 +569,10 @@ int is_dsp_inst(struct pt_regs *regs)
#define is_dsp_inst(regs) (0)
#endif /* CONFIG_SH_DSP */
-extern int do_fpu_inst(unsigned short, struct pt_regs*);
+/* arch/sh/kernel/cpu/sh4/fpu.c */
+extern int do_fpu_inst(unsigned short, struct pt_regs *);
+extern asmlinkage void do_fpu_state_restore(unsigned long r4, unsigned long r5,
+ unsigned long r6, unsigned long r7, struct pt_regs regs);
asmlinkage void do_reserved_inst(unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7,
@@ -709,14 +731,20 @@ void __init per_cpu_trap_init(void)
: "memory");
}
-void __init trap_init(void)
+void *set_exception_table_vec(unsigned int vec, void *handler)
{
extern void *exception_handling_table[];
+ void *old_handler;
+
+ old_handler = exception_handling_table[vec];
+ exception_handling_table[vec] = handler;
+ return old_handler;
+}
- exception_handling_table[TRAP_RESERVED_INST]
- = (void *)do_reserved_inst;
- exception_handling_table[TRAP_ILLEGAL_SLOT_INST]
- = (void *)do_illegal_slot_inst;
+void __init trap_init(void)
+{
+ set_exception_table_vec(TRAP_RESERVED_INST, do_reserved_inst);
+ set_exception_table_vec(TRAP_ILLEGAL_SLOT_INST, do_illegal_slot_inst);
#if defined(CONFIG_CPU_SH4) && !defined(CONFIG_SH_FPU) || \
defined(CONFIG_SH_FPU_EMU)
@@ -725,61 +753,54 @@ void __init trap_init(void)
* reserved. They'll be handled in the math-emu case, or faulted on
* otherwise.
*/
- /* entry 64 corresponds to EXPEVT=0x800 */
- exception_handling_table[64] = (void *)do_reserved_inst;
- exception_handling_table[65] = (void *)do_illegal_slot_inst;
+ set_exception_table_evt(0x800, do_reserved_inst);
+ set_exception_table_evt(0x820, do_illegal_slot_inst);
+#elif defined(CONFIG_SH_FPU)
+ set_exception_table_evt(0x800, do_fpu_state_restore);
+ set_exception_table_evt(0x820, do_fpu_state_restore);
#endif
/* Setup VBR for boot cpu */
per_cpu_trap_init();
}
-void show_stack(struct task_struct *tsk, unsigned long *sp)
+void show_trace(struct task_struct *tsk, unsigned long *sp,
+ struct pt_regs *regs)
{
- unsigned long *stack, addr;
- unsigned long module_start = VMALLOC_START;
- unsigned long module_end = VMALLOC_END;
- int i = 1;
-
- if (!tsk)
- tsk = current;
- if (tsk == current)
- sp = (unsigned long *)current_stack_pointer;
- else
- sp = (unsigned long *)tsk->thread.sp;
+ unsigned long addr;
- stack = sp;
+ if (regs && user_mode(regs))
+ return;
printk("\nCall trace: ");
#ifdef CONFIG_KALLSYMS
printk("\n");
#endif
- while (!kstack_end(stack)) {
- addr = *stack++;
- if (((addr >= (unsigned long)_text) &&
- (addr <= (unsigned long)_etext)) ||
- ((addr >= module_start) && (addr <= module_end))) {
- /*
- * For 80-columns display, 6 entry is maximum.
- * NOTE: '[<8c00abcd>] ' consumes 13 columns .
- */
-#ifndef CONFIG_KALLSYMS
- if (i && ((i % 6) == 0))
- printk("\n ");
-#endif
- printk("[<%08lx>] ", addr);
- print_symbol("%s\n", addr);
- i++;
- }
+ while (!kstack_end(sp)) {
+ addr = *sp++;
+ if (kernel_text_address(addr))
+ print_ip_sym(addr);
}
printk("\n");
}
-void show_task(unsigned long *sp)
+void show_stack(struct task_struct *tsk, unsigned long *sp)
{
- show_stack(NULL, sp);
+ unsigned long stack;
+
+ if (!tsk)
+ tsk = current;
+ if (tsk == current)
+ sp = (unsigned long *)current_stack_pointer;
+ else
+ sp = (unsigned long *)tsk->thread.sp;
+
+ stack = (unsigned long)sp;
+ dump_mem("Stack: ", stack, THREAD_SIZE +
+ (unsigned long)task_stack_page(tsk));
+ show_trace(tsk, sp, NULL);
}
void dump_stack(void)
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-11 22:19:09 +0000