X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Farm%2Fkernel%2Ftraps.c;h=f05e66b0f868df49fcd4e6ca4faeaf7b26c32fe2;hb=c6799ade4ae04b53a5f677e5289116155ff01574;hp=042a12982e980c43bb0520e289477df525a50fc2;hpb=7174d852603ced7a161f47c6e3958073706114a9;p=linux-2.6

diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 042a12982e..f05e66b0f8 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -16,7 +16,6 @@
 #include <linux/signal.h>
 #include <linux/spinlock.h>
 #include <linux/personality.h>
-#include <linux/ptrace.h>
 #include <linux/kallsyms.h>
 #include <linux/delay.h>
 #include <linux/init.h>
@@ -27,17 +26,11 @@
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 #include <asm/traps.h>
+#include <asm/io.h>
 
 #include "ptrace.h"
 #include "signal.h"
 
-const char *processor_modes[]=
-{ "USER_26", "FIQ_26" , "IRQ_26" , "SVC_26" , "UK4_26" , "UK5_26" , "UK6_26" , "UK7_26" ,
-  "UK8_26" , "UK9_26" , "UK10_26", "UK11_26", "UK12_26", "UK13_26", "UK14_26", "UK15_26",
-  "USER_32", "FIQ_32" , "IRQ_32" , "SVC_32" , "UK4_32" , "UK5_32" , "UK6_32" , "ABT_32" ,
-  "UK8_32" , "UK9_32" , "UK10_32", "UND_32" , "UK12_32", "UK13_32", "UK14_32", "SYS_32"
-};
-
 static const char *handler[]= { "prefetch abort", "data abort", "address exception", "interrupt" };
 
 #ifdef CONFIG_DEBUG_USER
@@ -51,7 +44,18 @@ static int __init user_debug_setup(char *str)
 __setup("user_debug=", user_debug_setup);
 #endif
 
-void dump_backtrace_entry(unsigned long where, unsigned long from)
+static void dump_mem(const char *str, unsigned long bottom, unsigned long top);
+
+static inline int in_exception_text(unsigned long ptr)
+{
+	extern char __exception_text_start[];
+	extern char __exception_text_end[];
+
+	return ptr >= (unsigned long)&__exception_text_start &&
+	       ptr < (unsigned long)&__exception_text_end;
+}
+
+void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame)
 {
 #ifdef CONFIG_KALLSYMS
 	printk("[<%08lx>] ", where);
@@ -61,6 +65,9 @@ void dump_backtrace_entry(unsigned long where, unsigned long from)
 #else
 	printk("Function entered at [<%08lx>] from [<%08lx>]\n", where, from);
 #endif
+
+	if (in_exception_text(where))
+		dump_mem("Exception stack", frame + 4, frame + 4 + sizeof(struct pt_regs));
 }
 
 /*
@@ -272,13 +279,14 @@ void unregister_undef_hook(struct undef_hook *hook)
 	spin_unlock_irqrestore(&undef_lock, flags);
 }
 
-asmlinkage void do_undefinstr(struct pt_regs *regs)
+asmlinkage void __exception do_undefinstr(struct pt_regs *regs)
 {
 	unsigned int correction = thumb_mode(regs) ? 2 : 4;
 	unsigned int instr;
 	struct undef_hook *hook;
 	siginfo_t info;
 	void __user *pc;
+	unsigned long flags;
 
 	/*
 	 * According to the ARM ARM, PC is 2 or 4 bytes ahead,
@@ -288,13 +296,16 @@ asmlinkage void do_undefinstr(struct pt_regs *regs)
 	regs->ARM_pc -= correction;
 
 	pc = (void __user *)instruction_pointer(regs);
-	if (thumb_mode(regs)) {
+
+	if (processor_mode(regs) == SVC_MODE) {
+		instr = *(u32 *) pc;
+	} else if (thumb_mode(regs)) {
 		get_user(instr, (u16 __user *)pc);
 	} else {
 		get_user(instr, (u32 __user *)pc);
 	}
 
-	spin_lock_irq(&undef_lock);
+	spin_lock_irqsave(&undef_lock, flags);
 	list_for_each_entry(hook, &undef_hook, node) {
 		if ((instr & hook->instr_mask) == hook->instr_val &&
 		    (regs->ARM_cpsr & hook->cpsr_mask) == hook->cpsr_val) {
@@ -304,7 +315,7 @@ asmlinkage void do_undefinstr(struct pt_regs *regs)
 			}
 		}
 	}
-	spin_unlock_irq(&undef_lock);
+	spin_unlock_irqrestore(&undef_lock, flags);
 
 #ifdef CONFIG_DEBUG_USER
 	if (user_debug & UDBG_UNDEFINED) {
@@ -336,12 +347,11 @@ asmlinkage void do_unexp_fiq (struct pt_regs *regs)
  * It never returns, and never tries to sync.  We hope that we can at least
  * dump out some state information...
  */
-asmlinkage void bad_mode(struct pt_regs *regs, int reason, int proc_mode)
+asmlinkage void bad_mode(struct pt_regs *regs, int reason)
 {
 	console_verbose();
 
-	printk(KERN_CRIT "Bad mode in %s handler detected: mode %s\n",
-		handler[reason], processor_modes[proc_mode]);
+	printk(KERN_CRIT "Bad mode in %s handler detected\n", handler[reason]);
 
 	die("Oops - bad mode", regs, 0);
 	local_irq_disable();