Merge remote-tracking branch 'asoc/fix/rt5645' into asoc-fix-rt5645

author: Mark Brown <broonie@kernel.org> 2015-10-12 18:09:27 +0100
committer: Mark Brown <broonie@kernel.org> 2015-10-12 18:09:27 +0100
commit: 79828b4fa835f73cdaf4bffa48696abdcbea9d02 (patch)
tree: 5e0fa7156acb75ba603022bc807df8f2fedb97a8 /arch/mips/kernel/traps.c
parent: 721b51fcf91898299d96f4b72cb9434cda29dce6 (diff)
parent: 8c1a9d6323abf0fb1e5dad96cf3f1c783505ea5a (diff)
1 files changed, 42 insertions, 28 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index e207a43b5f8f..fdb392b27e81 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -192,6 +192,7 @@ static void show_stacktrace(struct task_struct *task,
 void show_stack(struct task_struct *task, unsigned long *sp)
 {
 	struct pt_regs regs;
+	mm_segment_t old_fs = get_fs();
 	if (sp) {
 		regs.regs[29] = (unsigned long)sp;
 		regs.regs[31] = 0;
@@ -210,7 +211,13 @@ void show_stack(struct task_struct *task, unsigned long *sp)
 			prepare_frametrace(&regs);
 		}
 	}
+	/*
+	 * show_stack() deals exclusively with kernel mode, so be sure to access
+	 * the stack in the kernel (not user) address space.
+	 */
+	set_fs(KERNEL_DS);
 	show_stacktrace(task, &regs);
+	set_fs(old_fs);
 }
 
 static void show_code(unsigned int __user *pc)
@@ -363,11 +370,6 @@ void show_registers(struct pt_regs *regs)
 	set_fs(old_fs);
 }
 
-static int regs_to_trapnr(struct pt_regs *regs)
-{
-	return (regs->cp0_cause >> 2) & 0x1f;
-}
-
 static DEFINE_RAW_SPINLOCK(die_lock);
 
 void __noreturn die(const char *str, struct pt_regs *regs)
@@ -377,7 +379,7 @@ void __noreturn die(const char *str, struct pt_regs *regs)
 
 	oops_enter();
 
-	if (notify_die(DIE_OOPS, str, regs, 0, regs_to_trapnr(regs),
+	if (notify_die(DIE_OOPS, str, regs, 0, current->thread.trap_nr,
 		       SIGSEGV) == NOTIFY_STOP)
 		sig = 0;
 
@@ -463,7 +465,7 @@ asmlinkage void do_be(struct pt_regs *regs)
 	printk(KERN_ALERT "%s bus error, epc == %0*lx, ra == %0*lx\n",
 	       data ? "Data" : "Instruction",
 	       field, regs->cp0_epc, field, regs->regs[31]);
-	if (notify_die(DIE_OOPS, "bus error", regs, 0, regs_to_trapnr(regs),
+	if (notify_die(DIE_OOPS, "bus error", regs, 0, current->thread.trap_nr,
 		       SIGBUS) == NOTIFY_STOP)
 		goto out;
 
@@ -819,7 +821,7 @@ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
 	int sig;
 
 	prev_state = exception_enter();
-	if (notify_die(DIE_FP, "FP exception", regs, 0, regs_to_trapnr(regs),
+	if (notify_die(DIE_FP, "FP exception", regs, 0, current->thread.trap_nr,
 		       SIGFPE) == NOTIFY_STOP)
 		goto out;
 
@@ -875,11 +877,12 @@ void do_trap_or_bp(struct pt_regs *regs, unsigned int code,
 	char b[40];
 
 #ifdef CONFIG_KGDB_LOW_LEVEL_TRAP
-	if (kgdb_ll_trap(DIE_TRAP, str, regs, code, regs_to_trapnr(regs), SIGTRAP) == NOTIFY_STOP)
+	if (kgdb_ll_trap(DIE_TRAP, str, regs, code, current->thread.trap_nr,
+			 SIGTRAP) == NOTIFY_STOP)
 		return;
 #endif /* CONFIG_KGDB_LOW_LEVEL_TRAP */
 
-	if (notify_die(DIE_TRAP, str, regs, code, regs_to_trapnr(regs),
+	if (notify_die(DIE_TRAP, str, regs, code, current->thread.trap_nr,
 		       SIGTRAP) == NOTIFY_STOP)
 		return;
 
@@ -941,6 +944,7 @@ asmlinkage void do_bp(struct pt_regs *regs)
 		set_fs(KERNEL_DS);
 
 	prev_state = exception_enter();
+	current->thread.trap_nr = (regs->cp0_cause >> 2) & 0x1f;
 	if (get_isa16_mode(regs->cp0_epc)) {
 		u16 instr[2];
 
@@ -980,15 +984,27 @@ asmlinkage void do_bp(struct pt_regs *regs)
 	 * pertain to them.
 	 */
 	switch (bcode) {
+	case BRK_UPROBE:
+		if (notify_die(DIE_UPROBE, "uprobe", regs, bcode,
+			       current->thread.trap_nr, SIGTRAP) == NOTIFY_STOP)
+			goto out;
+		else
+			break;
+	case BRK_UPROBE_XOL:
+		if (notify_die(DIE_UPROBE_XOL, "uprobe_xol", regs, bcode,
+			       current->thread.trap_nr, SIGTRAP) == NOTIFY_STOP)
+			goto out;
+		else
+			break;
 	case BRK_KPROBE_BP:
 		if (notify_die(DIE_BREAK, "debug", regs, bcode,
-			       regs_to_trapnr(regs), SIGTRAP) == NOTIFY_STOP)
+			       current->thread.trap_nr, SIGTRAP) == NOTIFY_STOP)
 			goto out;
 		else
 			break;
 	case BRK_KPROBE_SSTEPBP:
 		if (notify_die(DIE_SSTEPBP, "single_step", regs, bcode,
-			       regs_to_trapnr(regs), SIGTRAP) == NOTIFY_STOP)
+			       current->thread.trap_nr, SIGTRAP) == NOTIFY_STOP)
 			goto out;
 		else
 			break;
@@ -1021,6 +1037,7 @@ asmlinkage void do_tr(struct pt_regs *regs)
 		set_fs(get_ds());
 
 	prev_state = exception_enter();
+	current->thread.trap_nr = (regs->cp0_cause >> 2) & 0x1f;
 	if (get_isa16_mode(regs->cp0_epc)) {
 		if (__get_user(instr[0], (u16 __user *)(epc + 0)) ||
 		    __get_user(instr[1], (u16 __user *)(epc + 2)))
@@ -1087,8 +1104,9 @@ asmlinkage void do_ri(struct pt_regs *regs)
 no_r2_instr:
 
 	prev_state = exception_enter();
+	current->thread.trap_nr = (regs->cp0_cause >> 2) & 0x1f;
 
-	if (notify_die(DIE_RI, "RI Fault", regs, 0, regs_to_trapnr(regs),
+	if (notify_die(DIE_RI, "RI Fault", regs, 0, current->thread.trap_nr,
 		       SIGILL) == NOTIFY_STOP)
 		goto out;
 
@@ -1437,8 +1455,9 @@ asmlinkage void do_msa_fpe(struct pt_regs *regs, unsigned int msacsr)
 	enum ctx_state prev_state;
 
 	prev_state = exception_enter();
+	current->thread.trap_nr = (regs->cp0_cause >> 2) & 0x1f;
 	if (notify_die(DIE_MSAFP, "MSA FP exception", regs, 0,
-		       regs_to_trapnr(regs), SIGFPE) == NOTIFY_STOP)
+		       current->thread.trap_nr, SIGFPE) == NOTIFY_STOP)
 		goto out;
 
 	/* Clear MSACSR.Cause before enabling interrupts */
@@ -1516,32 +1535,26 @@ asmlinkage void do_watch(struct pt_regs *regs)
 
 asmlinkage void do_mcheck(struct pt_regs *regs)
 {
-	const int field = 2 * sizeof(unsigned long);
 	int multi_match = regs->cp0_status & ST0_TS;
 	enum ctx_state prev_state;
+	mm_segment_t old_fs = get_fs();
 
 	prev_state = exception_enter();
 	show_regs(regs);
 
 	if (multi_match) {
-		pr_err("Index	: %0x\n", read_c0_index());
-		pr_err("Pagemask: %0x\n", read_c0_pagemask());
-		pr_err("EntryHi : %0*lx\n", field, read_c0_entryhi());
-		pr_err("EntryLo0: %0*lx\n", field, read_c0_entrylo0());
-		pr_err("EntryLo1: %0*lx\n", field, read_c0_entrylo1());
-		pr_err("Wired   : %0x\n", read_c0_wired());
-		pr_err("Pagegrain: %0x\n", read_c0_pagegrain());
-		if (cpu_has_htw) {
-			pr_err("PWField : %0*lx\n", field, read_c0_pwfield());
-			pr_err("PWSize  : %0*lx\n", field, read_c0_pwsize());
-			pr_err("PWCtl   : %0x\n", read_c0_pwctl());
-		}
-		pr_err("\n");
+		dump_tlb_regs();
+		pr_info("\n");
 		dump_tlb_all();
 	}
 
+	if (!user_mode(regs))
+		set_fs(KERNEL_DS);
+
 	show_code((unsigned int __user *) regs->cp0_epc);
 
+	set_fs(old_fs);
+
 	/*
 	 * Some chips may have other causes of machine check (e.g. SB1
 	 * graduation timer)
@@ -1638,6 +1651,7 @@ static inline void parity_protection_init(void)
 	case CPU_PROAPTIV:
 	case CPU_P5600:
 	case CPU_QEMU_GENERIC:
+	case CPU_I6400:
 		{
 #define ERRCTL_PE	0x80000000
 #define ERRCTL_L2P	0x00800000
author	Mark Brown <broonie@kernel.org>	2015-10-12 18:09:27 +0100
committer	Mark Brown <broonie@kernel.org>	2015-10-12 18:09:27 +0100
commit	79828b4fa835f73cdaf4bffa48696abdcbea9d02 (patch)
tree	5e0fa7156acb75ba603022bc807df8f2fedb97a8 /arch/mips/kernel/traps.c
parent	721b51fcf91898299d96f4b72cb9434cda29dce6 (diff)
parent	8c1a9d6323abf0fb1e5dad96cf3f1c783505ea5a (diff)