summaryrefslogtreecommitdiff
path: root/arch/sh/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sh/kernel')
-rw-r--r--arch/sh/kernel/cpu/sh5/entry.S82
-rw-r--r--arch/sh/kernel/cpu/sh5/unwind.c63
-rw-r--r--arch/sh/kernel/dumpstack.c58
-rw-r--r--arch/sh/kernel/irq.c10
-rw-r--r--arch/sh/kernel/process.c1
-rw-r--r--arch/sh/kernel/process_64.c1
-rw-r--r--arch/sh/kernel/sh_ksyms_64.c2
-rw-r--r--arch/sh/kernel/signal_32.c45
-rw-r--r--arch/sh/kernel/signal_64.c49
-rw-r--r--arch/sh/kernel/smp.c7
-rw-r--r--arch/sh/kernel/traps.c71
-rw-r--r--arch/sh/kernel/traps_32.c121
-rw-r--r--arch/sh/kernel/traps_64.c589
13 files changed, 418 insertions, 681 deletions
diff --git a/arch/sh/kernel/cpu/sh5/entry.S b/arch/sh/kernel/cpu/sh5/entry.S
index ff1f0e6e9bec..b7cf6a547f11 100644
--- a/arch/sh/kernel/cpu/sh5/entry.S
+++ b/arch/sh/kernel/cpu/sh5/entry.S
@@ -1569,86 +1569,6 @@ ___clear_user_exit:
#endif /* CONFIG_MMU */
/*
- * int __strncpy_from_user(unsigned long __dest, unsigned long __src,
- * int __count)
- *
- * Inputs:
- * (r2) target address
- * (r3) source address
- * (r4) maximum size in bytes
- *
- * Ouputs:
- * (*r2) copied data
- * (r2) -EFAULT (in case of faulting)
- * copied data (otherwise)
- */
- .global __strncpy_from_user
-__strncpy_from_user:
- pta ___strncpy_from_user1, tr0
- pta ___strncpy_from_user_done, tr1
- or r4, ZERO, r5 /* r5 = original count */
- beq/u r4, r63, tr1 /* early exit if r4==0 */
- movi -(EFAULT), r6 /* r6 = reply, no real fixup */
- or ZERO, ZERO, r7 /* r7 = data, clear top byte of data */
-
-___strncpy_from_user1:
- ld.b r3, 0, r7 /* Fault address: only in reading */
- st.b r2, 0, r7
- addi r2, 1, r2
- addi r3, 1, r3
- beq/u ZERO, r7, tr1
- addi r4, -1, r4 /* return real number of copied bytes */
- bne/l ZERO, r4, tr0
-
-___strncpy_from_user_done:
- sub r5, r4, r6 /* If done, return copied */
-
-___strncpy_from_user_exit:
- or r6, ZERO, r2
- ptabs LINK, tr0
- blink tr0, ZERO
-
-/*
- * extern long __strnlen_user(const char *__s, long __n)
- *
- * Inputs:
- * (r2) source address
- * (r3) source size in bytes
- *
- * Ouputs:
- * (r2) -EFAULT (in case of faulting)
- * string length (otherwise)
- */
- .global __strnlen_user
-__strnlen_user:
- pta ___strnlen_user_set_reply, tr0
- pta ___strnlen_user1, tr1
- or ZERO, ZERO, r5 /* r5 = counter */
- movi -(EFAULT), r6 /* r6 = reply, no real fixup */
- or ZERO, ZERO, r7 /* r7 = data, clear top byte of data */
- beq r3, ZERO, tr0
-
-___strnlen_user1:
- ldx.b r2, r5, r7 /* Fault address: only in reading */
- addi r3, -1, r3 /* No real fixup */
- addi r5, 1, r5
- beq r3, ZERO, tr0
- bne r7, ZERO, tr1
-! The line below used to be active. This meant led to a junk byte lying between each pair
-! of entries in the argv & envp structures in memory. Whilst the program saw the right data
-! via the argv and envp arguments to main, it meant the 'flat' representation visible through
-! /proc/$pid/cmdline was corrupt, causing trouble with ps, for example.
-! addi r5, 1, r5 /* Include '\0' */
-
-___strnlen_user_set_reply:
- or r5, ZERO, r6 /* If done, return counter */
-
-___strnlen_user_exit:
- or r6, ZERO, r2
- ptabs LINK, tr0
- blink tr0, ZERO
-
-/*
* extern long __get_user_asm_?(void *val, long addr)
*
* Inputs:
@@ -1982,8 +1902,6 @@ asm_uaccess_start:
.long ___copy_user2, ___copy_user_exit
.long ___clear_user1, ___clear_user_exit
#endif
- .long ___strncpy_from_user1, ___strncpy_from_user_exit
- .long ___strnlen_user1, ___strnlen_user_exit
.long ___get_user_asm_b1, ___get_user_asm_b_exit
.long ___get_user_asm_w1, ___get_user_asm_w_exit
.long ___get_user_asm_l1, ___get_user_asm_l_exit
diff --git a/arch/sh/kernel/cpu/sh5/unwind.c b/arch/sh/kernel/cpu/sh5/unwind.c
index b205b25eaf45..10aed41757fc 100644
--- a/arch/sh/kernel/cpu/sh5/unwind.c
+++ b/arch/sh/kernel/cpu/sh5/unwind.c
@@ -16,6 +16,8 @@
#include <asm/ptrace.h>
#include <asm/processor.h>
#include <asm/io.h>
+#include <asm/unwinder.h>
+#include <asm/stacktrace.h>
static u8 regcache[63];
@@ -199,8 +201,11 @@ static int lookup_prev_stack_frame(unsigned long fp, unsigned long pc,
return 0;
}
-/* Don't put this on the stack since we'll want to call sh64_unwind
- * when we're close to underflowing the stack anyway. */
+/*
+ * Don't put this on the stack since we'll want to call in to
+ * sh64_unwinder_dump() when we're close to underflowing the stack
+ * anyway.
+ */
static struct pt_regs here_regs;
extern const char syscall_ret;
@@ -208,17 +213,19 @@ extern const char ret_from_syscall;
extern const char ret_from_exception;
extern const char ret_from_irq;
-static void sh64_unwind_inner(struct pt_regs *regs);
+static void sh64_unwind_inner(const struct stacktrace_ops *ops,
+ void *data, struct pt_regs *regs);
-static void unwind_nested (unsigned long pc, unsigned long fp)
+static inline void unwind_nested(const struct stacktrace_ops *ops, void *data,
+ unsigned long pc, unsigned long fp)
{
if ((fp >= __MEMORY_START) &&
- ((fp & 7) == 0)) {
- sh64_unwind_inner((struct pt_regs *) fp);
- }
+ ((fp & 7) == 0))
+ sh64_unwind_inner(ops, data, (struct pt_regs *)fp);
}
-static void sh64_unwind_inner(struct pt_regs *regs)
+static void sh64_unwind_inner(const struct stacktrace_ops *ops,
+ void *data, struct pt_regs *regs)
{
unsigned long pc, fp;
int ofs = 0;
@@ -232,29 +239,29 @@ static void sh64_unwind_inner(struct pt_regs *regs)
int cond;
unsigned long next_fp, next_pc;
- if (pc == ((unsigned long) &syscall_ret & ~1)) {
+ if (pc == ((unsigned long)&syscall_ret & ~1)) {
printk("SYSCALL\n");
- unwind_nested(pc,fp);
+ unwind_nested(ops, data, pc, fp);
return;
}
- if (pc == ((unsigned long) &ret_from_syscall & ~1)) {
+ if (pc == ((unsigned long)&ret_from_syscall & ~1)) {
printk("SYSCALL (PREEMPTED)\n");
- unwind_nested(pc,fp);
+ unwind_nested(ops, data, pc, fp);
return;
}
/* In this case, the PC is discovered by lookup_prev_stack_frame but
it has 4 taken off it to look like the 'caller' */
- if (pc == ((unsigned long) &ret_from_exception & ~1)) {
+ if (pc == ((unsigned long)&ret_from_exception & ~1)) {
printk("EXCEPTION\n");
- unwind_nested(pc,fp);
+ unwind_nested(ops, data, pc, fp);
return;
}
- if (pc == ((unsigned long) &ret_from_irq & ~1)) {
+ if (pc == ((unsigned long)&ret_from_irq & ~1)) {
printk("IRQ\n");
- unwind_nested(pc,fp);
+ unwind_nested(ops, data, pc, fp);
return;
}
@@ -263,8 +270,7 @@ static void sh64_unwind_inner(struct pt_regs *regs)
pc -= ofs;
- printk("[<%08lx>] ", pc);
- print_symbol("%s\n", pc);
+ ops->address(data, pc, 1);
if (first_pass) {
/* If the innermost frame is a leaf function, it's
@@ -287,10 +293,13 @@ static void sh64_unwind_inner(struct pt_regs *regs)
}
printk("\n");
-
}
-void sh64_unwind(struct pt_regs *regs)
+static void sh64_unwinder_dump(struct task_struct *task,
+ struct pt_regs *regs,
+ unsigned long *sp,
+ const struct stacktrace_ops *ops,
+ void *data)
{
if (!regs) {
/*
@@ -320,7 +329,17 @@ void sh64_unwind(struct pt_regs *regs)
);
}
- printk("\nCall Trace:\n");
- sh64_unwind_inner(regs);
+ sh64_unwind_inner(ops, data, regs);
}
+static struct unwinder sh64_unwinder = {
+ .name = "sh64-unwinder",
+ .dump = sh64_unwinder_dump,
+ .rating = 150,
+};
+
+static int __init sh64_unwinder_init(void)
+{
+ return unwinder_register(&sh64_unwinder);
+}
+early_initcall(sh64_unwinder_init);
diff --git a/arch/sh/kernel/dumpstack.c b/arch/sh/kernel/dumpstack.c
index 694158b9a50f..7617dc4129ac 100644
--- a/arch/sh/kernel/dumpstack.c
+++ b/arch/sh/kernel/dumpstack.c
@@ -2,13 +2,48 @@
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
* Copyright (C) 2009 Matt Fleming
+ * Copyright (C) 2002 - 2012 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/kallsyms.h>
#include <linux/ftrace.h>
#include <linux/debug_locks.h>
+#include <linux/kdebug.h>
+#include <linux/export.h>
+#include <linux/uaccess.h>
#include <asm/unwinder.h>
#include <asm/stacktrace.h>
+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");
+ }
+}
+
void printk_address(unsigned long address, int reliable)
{
printk(" [<%p>] %s%pS\n", (void *) address,
@@ -106,3 +141,26 @@ void show_trace(struct task_struct *tsk, unsigned long *sp,
debug_show_held_locks(tsk);
}
+
+void show_stack(struct task_struct *tsk, unsigned long *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)
+{
+ show_stack(NULL, NULL);
+}
+EXPORT_SYMBOL(dump_stack);
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
index dadce735f746..063af10ff3c1 100644
--- a/arch/sh/kernel/irq.c
+++ b/arch/sh/kernel/irq.c
@@ -231,16 +231,6 @@ void __init init_IRQ(void)
irq_ctx_init(smp_processor_id());
}
-#ifdef CONFIG_SPARSE_IRQ
-int __init arch_probe_nr_irqs(void)
-{
- /*
- * No pre-allocated IRQs.
- */
- return 0;
-}
-#endif
-
#ifdef CONFIG_HOTPLUG_CPU
static void route_irq(struct irq_data *data, unsigned int irq, unsigned int cpu)
{
diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 9b7a459a4613..055d91b70305 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -4,6 +4,7 @@
#include <linux/sched.h>
#include <linux/export.h>
#include <linux/stackprotector.h>
+#include <asm/fpu.h>
struct kmem_cache *task_xstate_cachep = NULL;
unsigned int xstate_size;
diff --git a/arch/sh/kernel/process_64.c b/arch/sh/kernel/process_64.c
index 4264583eabac..602545b12a86 100644
--- a/arch/sh/kernel/process_64.c
+++ b/arch/sh/kernel/process_64.c
@@ -33,6 +33,7 @@
#include <asm/switch_to.h>
struct task_struct *last_task_used_math = NULL;
+struct pt_regs fake_swapper_regs = { 0, };
void show_regs(struct pt_regs *regs)
{
diff --git a/arch/sh/kernel/sh_ksyms_64.c b/arch/sh/kernel/sh_ksyms_64.c
index 45afa5c51f67..26a0774f5272 100644
--- a/arch/sh/kernel/sh_ksyms_64.c
+++ b/arch/sh/kernel/sh_ksyms_64.c
@@ -32,8 +32,6 @@ EXPORT_SYMBOL(__get_user_asm_b);
EXPORT_SYMBOL(__get_user_asm_w);
EXPORT_SYMBOL(__get_user_asm_l);
EXPORT_SYMBOL(__get_user_asm_q);
-EXPORT_SYMBOL(__strnlen_user);
-EXPORT_SYMBOL(__strncpy_from_user);
EXPORT_SYMBOL(__clear_user);
EXPORT_SYMBOL(copy_page);
EXPORT_SYMBOL(__copy_user);
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index cb4172c8af7d..d6b7b6154f87 100644
--- a/arch/sh/kernel/signal_32.c
+++ b/arch/sh/kernel/signal_32.c
@@ -32,8 +32,6 @@
#include <asm/syscalls.h>
#include <asm/fpu.h>
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
struct fdpic_func_descriptor {
unsigned long text;
unsigned long GOT;
@@ -226,7 +224,6 @@ asmlinkage int sys_sigreturn(unsigned long r4, unsigned long r5,
sizeof(frame->extramask))))
goto badframe;
- sigdelsetmask(&set, ~_BLOCKABLE);
set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->sc, &r0))
@@ -256,7 +253,6 @@ asmlinkage int sys_rt_sigreturn(unsigned long r4, unsigned long r5,
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
- sigdelsetmask(&set, ~_BLOCKABLE);
set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))
@@ -522,10 +518,11 @@ handle_syscall_restart(unsigned long save_r0, struct pt_regs *regs,
/*
* OK, we're invoking a handler
*/
-static int
+static void
handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *oldset, struct pt_regs *regs, unsigned int save_r0)
+ struct pt_regs *regs, unsigned int save_r0)
{
+ sigset_t *oldset = sigmask_to_save();
int ret;
/* Set up the stack frame */
@@ -534,10 +531,10 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
else
ret = setup_frame(sig, ka, oldset, regs);
- if (ret == 0)
- block_sigmask(ka, sig);
-
- return ret;
+ if (ret)
+ return;
+ signal_delivered(sig, info, ka, regs,
+ test_thread_flag(TIF_SINGLESTEP));
}
/*
@@ -554,7 +551,6 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
siginfo_t info;
int signr;
struct k_sigaction ka;
- sigset_t *oldset;
/*
* We want the common case to go fast, which
@@ -565,30 +561,12 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
if (!user_mode(regs))
return;
- if (current_thread_info()->status & TS_RESTORE_SIGMASK)
- oldset = &current->saved_sigmask;
- else
- oldset = &current->blocked;
-
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
handle_syscall_restart(save_r0, regs, &ka.sa);
/* Whee! Actually deliver the signal. */
- if (handle_signal(signr, &ka, &info, oldset,
- regs, save_r0) == 0) {
- /*
- * A signal was successfully delivered; the saved
- * sigmask will have been stored in the signal frame,
- * and will be restored by sigreturn, so we can simply
- * clear the TS_RESTORE_SIGMASK flag
- */
- current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
-
- tracehook_signal_handler(signr, &info, &ka, regs,
- test_thread_flag(TIF_SINGLESTEP));
- }
-
+ handle_signal(signr, &ka, &info, regs, save_r0);
return;
}
@@ -610,10 +588,7 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
* If there's no signal to deliver, we just put the saved sigmask
* back.
*/
- if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
- current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
- sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
- }
+ restore_saved_sigmask();
}
asmlinkage void do_notify_resume(struct pt_regs *regs, unsigned int save_r0,
@@ -626,7 +601,5 @@ asmlinkage void do_notify_resume(struct pt_regs *regs, unsigned int save_r0,
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
tracehook_notify_resume(regs);
- if (current->replacement_session_keyring)
- key_replace_session_keyring();
}
}
diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c
index b589a354c069..6b5b3dfe886b 100644
--- a/arch/sh/kernel/signal_64.c
+++ b/arch/sh/kernel/signal_64.c
@@ -41,11 +41,9 @@
#define DEBUG_SIG 0
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
-static int
+static void
handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
- sigset_t *oldset, struct pt_regs * regs);
+ struct pt_regs * regs);
static inline void
handle_syscall_restart(struct pt_regs *regs, struct sigaction *sa)
@@ -88,7 +86,6 @@ static void do_signal(struct pt_regs *regs)
siginfo_t info;
int signr;
struct k_sigaction ka;
- sigset_t *oldset;
/*
* We want the common case to go fast, which
@@ -99,28 +96,13 @@ static void do_signal(struct pt_regs *regs)
if (!user_mode(regs))
return;
- if (current_thread_info()->status & TS_RESTORE_SIGMASK)
- oldset = &current->saved_sigmask;
- else
- oldset = &current->blocked;
-
signr = get_signal_to_deliver(&info, &ka, regs, 0);
if (signr > 0) {
handle_syscall_restart(regs, &ka.sa);
/* Whee! Actually deliver the signal. */
- if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
- /*
- * If a signal was successfully delivered, the
- * saved sigmask is in its frame, and we can
- * clear the TS_RESTORE_SIGMASK flag.
- */
- current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
-
- tracehook_signal_handler(signr, &info, &ka, regs,
- test_thread_flag(TIF_SINGLESTEP));
- return;
- }
+ handle_signal(signr, &info, &ka, regs);
+ return;
}
/* Did we come from a system call? */
@@ -143,12 +125,7 @@ static void do_signal(struct pt_regs *regs)
}
/* No signal to deliver -- put the saved sigmask back */
- if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
- current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
- sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
- }
-
- return;
+ restore_saved_sigmask();
}
/*
@@ -351,7 +328,6 @@ asmlinkage int sys_sigreturn(unsigned long r2, unsigned long r3,
sizeof(frame->extramask))))
goto badframe;
- sigdelsetmask(&set, ~_BLOCKABLE);
set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->sc, &ret))
@@ -384,7 +360,6 @@ asmlinkage int sys_rt_sigreturn(unsigned long r2, unsigned long r3,
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
- sigdelsetmask(&set, ~_BLOCKABLE);
set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ret))
@@ -659,10 +634,11 @@ give_sigsegv:
/*
* OK, we're invoking a handler
*/
-static int
+static void
handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
- sigset_t *oldset, struct pt_regs * regs)
+ struct pt_regs * regs)
{
+ sigset_t *oldset = sigmask_to_save();
int ret;
/* Set up the stack frame */
@@ -671,10 +647,11 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
else
ret = setup_frame(sig, ka, oldset, regs);
- if (ret == 0)
- block_sigmask(ka, sig);
+ if (ret)
+ return;
- return ret;
+ signal_delivered(sig, info, ka, regs,
+ test_thread_flag(TIF_SINGLESTEP));
}
asmlinkage void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)
@@ -685,7 +662,5 @@ asmlinkage void do_notify_resume(struct pt_regs *regs, unsigned long thread_info
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
tracehook_notify_resume(regs);
- if (current->replacement_session_keyring)
- key_replace_session_keyring();
}
}
diff --git a/arch/sh/kernel/smp.c b/arch/sh/kernel/smp.c
index b86e9ca79455..2062aa88af41 100644
--- a/arch/sh/kernel/smp.c
+++ b/arch/sh/kernel/smp.c
@@ -123,7 +123,6 @@ void native_play_dead(void)
int __cpu_disable(void)
{
unsigned int cpu = smp_processor_id();
- struct task_struct *p;
int ret;
ret = mp_ops->cpu_disable(cpu);
@@ -153,11 +152,7 @@ int __cpu_disable(void)
flush_cache_all();
local_flush_tlb_all();
- read_lock(&tasklist_lock);
- for_each_process(p)
- if (p->mm)
- cpumask_clear_cpu(cpu, mm_cpumask(p->mm));
- read_unlock(&tasklist_lock);
+ clear_tasks_mm_cpumask(cpu);
return 0;
}
diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c
index a87e58a9e38f..72246bc06884 100644
--- a/arch/sh/kernel/traps.c
+++ b/arch/sh/kernel/traps.c
@@ -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)
{
diff --git a/arch/sh/kernel/traps_32.c b/arch/sh/kernel/traps_32.c
index a37175deb73f..5f513a64dedf 100644
--- a/arch/sh/kernel/traps_32.c
+++ b/arch/sh/kernel/traps_32.c
@@ -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>
@@ -48,102 +46,6 @@
#define TRAP_ILLEGAL_SLOT_INST 13
#endif
-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");
- }
-}
-
-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__
@@ -900,26 +802,3 @@ void __init trap_init(void)
set_exception_table_vec(TRAP_UBC, breakpoint_trap_handler);
#endif
}
-
-void show_stack(struct task_struct *tsk, unsigned long *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)
-{
- show_stack(NULL, NULL);
-}
-EXPORT_SYMBOL(dump_stack);
diff --git a/arch/sh/kernel/traps_64.c b/arch/sh/kernel/traps_64.c
index 8dae93ed8aff..f87d20da1791 100644
--- a/arch/sh/kernel/traps_64.c
+++ b/arch/sh/kernel/traps_64.c
@@ -27,283 +27,25 @@
#include <linux/perf_event.h>
#include <asm/uaccess.h>
#include <asm/io.h>
-#include <linux/atomic.h>
+#include <asm/alignment.h>
#include <asm/processor.h>
#include <asm/pgtable.h>
#include <asm/fpu.h>
-#undef DEBUG_EXCEPTION
-#ifdef DEBUG_EXCEPTION
-/* implemented in ../lib/dbg.c */
-extern void show_excp_regs(char *fname, int trapnr, int signr,
- struct pt_regs *regs);
-#else
-#define show_excp_regs(a, b, c, d)
-#endif
-
-static void do_unhandled_exception(int trapnr, int signr, char *str, char *fn_name,
- unsigned long error_code, struct pt_regs *regs, struct task_struct *tsk);
-
-#define DO_ERROR(trapnr, signr, str, name, tsk) \
-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)
-
-
-/* Implement misaligned load/store handling for kernel (and optionally for user
- mode too). Limitation : only SHmedia mode code is handled - there is no
- handling at all for misaligned accesses occurring in SHcompact code yet. */
-
-static int misaligned_fixup(struct pt_regs *regs);
-
-asmlinkage void do_address_error_load(unsigned long error_code, struct pt_regs *regs)
-{
- if (misaligned_fixup(regs) < 0) {
- do_unhandled_exception(7, SIGSEGV, "address error(load)",
- "do_address_error_load",
- error_code, regs, current);
- }
- return;
-}
-
-asmlinkage void do_address_error_store(unsigned long error_code, struct pt_regs *regs)
-{
- if (misaligned_fixup(regs) < 0) {
- do_unhandled_exception(8, SIGSEGV, "address error(store)",
- "do_address_error_store",
- error_code, regs, current);
- }
- return;
-}
-
-#if defined(CONFIG_SH64_ID2815_WORKAROUND)
-
-#define OPCODE_INVALID 0
-#define OPCODE_USER_VALID 1
-#define OPCODE_PRIV_VALID 2
-
-/* getcon/putcon - requires checking which control register is referenced. */
-#define OPCODE_CTRL_REG 3
-
-/* Table of valid opcodes for SHmedia mode.
- Form a 10-bit value by concatenating the major/minor opcodes i.e.
- opcode[31:26,20:16]. The 6 MSBs of this value index into the following
- array. The 4 LSBs select the bit-pair in the entry (bits 1:0 correspond to
- LSBs==4'b0000 etc). */
-static unsigned long shmedia_opcode_table[64] = {
- 0x55554044,0x54445055,0x15141514,0x14541414,0x00000000,0x10001000,0x01110055,0x04050015,
- 0x00000444,0xc0000000,0x44545515,0x40405555,0x55550015,0x10005555,0x55555505,0x04050000,
- 0x00000555,0x00000404,0x00040445,0x15151414,0x00000000,0x00000000,0x00000000,0x00000000,
- 0x00000055,0x40404444,0x00000404,0xc0009495,0x00000000,0x00000000,0x00000000,0x00000000,
- 0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,
- 0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,
- 0x80005050,0x04005055,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,
- 0x81055554,0x00000404,0x55555555,0x55555555,0x00000000,0x00000000,0x00000000,0x00000000
-};
-
-void do_reserved_inst(unsigned long error_code, struct pt_regs *regs)
-{
- /* Workaround SH5-101 cut2 silicon defect #2815 :
- in some situations, inter-mode branches from SHcompact -> SHmedia
- which should take ITLBMISS or EXECPROT exceptions at the target
- falsely take RESINST at the target instead. */
-
- unsigned long opcode = 0x6ff4fff0; /* guaranteed reserved opcode */
- unsigned long pc, aligned_pc;
- int get_user_error;
- int trapnr = 12;
- int signr = SIGILL;
- char *exception_name = "reserved_instruction";
-
- pc = regs->pc;
- if ((pc & 3) == 1) {
- /* SHmedia : check for defect. This requires executable vmas
- to be readable too. */
- aligned_pc = pc & ~3;
- if (!access_ok(VERIFY_READ, aligned_pc, sizeof(unsigned long))) {
- get_user_error = -EFAULT;
- } else {
- get_user_error = __get_user(opcode, (unsigned long *)aligned_pc);
- }
- if (get_user_error >= 0) {
- unsigned long index, shift;
- unsigned long major, minor, combined;
- unsigned long reserved_field;
- reserved_field = opcode & 0xf; /* These bits are currently reserved as zero in all valid opcodes */
- major = (opcode >> 26) & 0x3f;
- minor = (opcode >> 16) & 0xf;
- combined = (major << 4) | minor;
- index = major;
- shift = minor << 1;
- if (reserved_field == 0) {
- int opcode_state = (shmedia_opcode_table[index] >> shift) & 0x3;
- switch (opcode_state) {
- case OPCODE_INVALID:
- /* Trap. */
- break;
- case OPCODE_USER_VALID:
- /* Restart the instruction : the branch to the instruction will now be from an RTE
- not from SHcompact so the silicon defect won't be triggered. */
- return;
- case OPCODE_PRIV_VALID:
- if (!user_mode(regs)) {
- /* Should only ever get here if a module has
- SHcompact code inside it. If so, the same fix up is needed. */
- return; /* same reason */
- }
- /* Otherwise, user mode trying to execute a privileged instruction -
- fall through to trap. */
- break;
- case OPCODE_CTRL_REG:
- /* If in privileged mode, return as above. */
- if (!user_mode(regs)) return;
- /* In user mode ... */
- if (combined == 0x9f) { /* GETCON */
- unsigned long regno = (opcode >> 20) & 0x3f;
- if (regno >= 62) {
- return;
- }
- /* Otherwise, reserved or privileged control register, => trap */
- } else if (combined == 0x1bf) { /* PUTCON */
- unsigned long regno = (opcode >> 4) & 0x3f;
- if (regno >= 62) {
- return;
- }
- /* Otherwise, reserved or privileged control register, => trap */
- } else {
- /* Trap */
- }
- break;
- default:
- /* Fall through to trap. */
- break;
- }
- }
- /* fall through to normal resinst processing */
- } else {
- /* Error trying to read opcode. This typically means a
- real fault, not a RESINST any more. So change the
- codes. */
- trapnr = 87;
- exception_name = "address error (exec)";
- signr = SIGSEGV;
- }
- }
-
- do_unhandled_exception(trapnr, signr, exception_name, "do_reserved_inst", error_code, regs, current);
-}
-
-#else /* CONFIG_SH64_ID2815_WORKAROUND */
-
-/* If the workaround isn't needed, this is just a straightforward reserved
- instruction */
-DO_ERROR(12, SIGILL, "reserved instruction", reserved_inst, current)
-
-#endif /* CONFIG_SH64_ID2815_WORKAROUND */
-
-/* Called with interrupts disabled */
-asmlinkage void do_exception_error(unsigned long ex, struct pt_regs *regs)
-{
- show_excp_regs(__func__, -1, -1, regs);
- die_if_kernel("exception", regs, ex);
-}
-
-int do_unknown_trapa(unsigned long scId, struct pt_regs *regs)
-{
- /* Syscall debug */
- printk("System call ID error: [0x1#args:8 #syscall:16 0x%lx]\n", scId);
-
- die_if_kernel("unknown trapa", regs, scId);
-
- return -ENOSYS;
-}
-
-void show_stack(struct task_struct *tsk, unsigned long *sp)
-{
-#ifdef CONFIG_KALLSYMS
- extern void sh64_unwind(struct pt_regs *regs);
- struct pt_regs *regs;
-
- regs = tsk ? tsk->thread.kregs : NULL;
-
- sh64_unwind(regs);
-#else
- printk(KERN_ERR "Can't backtrace on sh64 without CONFIG_KALLSYMS\n");
-#endif
-}
-
-void show_task(unsigned long *sp)
-{
- show_stack(NULL, sp);
-}
-
-void dump_stack(void)
-{
- show_task(NULL);
-}
-/* Needed by any user of WARN_ON in view of the defn in include/asm-sh/bug.h */
-EXPORT_SYMBOL(dump_stack);
-
-static void do_unhandled_exception(int trapnr, int signr, char *str, char *fn_name,
- unsigned long error_code, struct pt_regs *regs, struct task_struct *tsk)
-{
- show_excp_regs(fn_name, trapnr, signr, regs);
-
- if (user_mode(regs))
- force_sig(signr, tsk);
-
- die_if_no_fixup(str, regs, error_code);
-}
-
-static int read_opcode(unsigned long long pc, unsigned long *result_opcode, int from_user_mode)
+static int read_opcode(reg_size_t pc, insn_size_t *result_opcode, int from_user_mode)
{
int get_user_error;
unsigned long aligned_pc;
- unsigned long opcode;
+ insn_size_t opcode;
if ((pc & 3) == 1) {
/* SHmedia */
aligned_pc = pc & ~3;
if (from_user_mode) {
- if (!access_ok(VERIFY_READ, aligned_pc, sizeof(unsigned long))) {
+ if (!access_ok(VERIFY_READ, aligned_pc, sizeof(insn_size_t))) {
get_user_error = -EFAULT;
} else {
- get_user_error = __get_user(opcode, (unsigned long *)aligned_pc);
+ get_user_error = __get_user(opcode, (insn_size_t *)aligned_pc);
*result_opcode = opcode;
}
return get_user_error;
@@ -311,7 +53,7 @@ static int read_opcode(unsigned long long pc, unsigned long *result_opcode, int
/* If the fault was in the kernel, we can either read
* this directly, or if not, we fault.
*/
- *result_opcode = *(unsigned long *) aligned_pc;
+ *result_opcode = *(insn_size_t *)aligned_pc;
return 0;
}
} else if ((pc & 1) == 0) {
@@ -337,17 +79,23 @@ static int address_is_sign_extended(__u64 a)
#endif
}
+/* return -1 for fault, 0 for OK */
static int generate_and_check_address(struct pt_regs *regs,
- __u32 opcode,
+ insn_size_t opcode,
int displacement_not_indexed,
int width_shift,
__u64 *address)
{
- /* return -1 for fault, 0 for OK */
-
__u64 base_address, addr;
int basereg;
+ switch (1 << width_shift) {
+ case 1: inc_unaligned_byte_access(); break;
+ case 2: inc_unaligned_word_access(); break;
+ case 4: inc_unaligned_dword_access(); break;
+ case 8: inc_unaligned_multi_access(); break;
+ }
+
basereg = (opcode >> 20) & 0x3f;
base_address = regs->regs[basereg];
if (displacement_not_indexed) {
@@ -364,28 +112,28 @@ static int generate_and_check_address(struct pt_regs *regs,
}
/* Check sign extended */
- if (!address_is_sign_extended(addr)) {
+ if (!address_is_sign_extended(addr))
return -1;
- }
/* Check accessible. For misaligned access in the kernel, assume the
address is always accessible (and if not, just fault when the
load/store gets done.) */
if (user_mode(regs)) {
- if (addr >= TASK_SIZE) {
+ inc_unaligned_user_access();
+
+ if (addr >= TASK_SIZE)
return -1;
- }
- /* Do access_ok check later - it depends on whether it's a load or a store. */
- }
+ } else
+ inc_unaligned_kernel_access();
*address = addr;
+
+ perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, addr);
+ unaligned_fixups_notify(current, opcode, regs);
+
return 0;
}
-static int user_mode_unaligned_fixup_count = 10;
-static int user_mode_unaligned_fixup_enable = 1;
-static int kernel_mode_unaligned_fixup_count = 32;
-
static void misaligned_kernel_word_load(__u64 address, int do_sign_extend, __u64 *result)
{
unsigned short x;
@@ -415,7 +163,7 @@ static void misaligned_kernel_word_store(__u64 address, __u64 value)
}
static int misaligned_load(struct pt_regs *regs,
- __u32 opcode,
+ insn_size_t opcode,
int displacement_not_indexed,
int width_shift,
int do_sign_extend)
@@ -427,11 +175,8 @@ static int misaligned_load(struct pt_regs *regs,
error = generate_and_check_address(regs, opcode,
displacement_not_indexed, width_shift, &address);
- if (error < 0) {
+ if (error < 0)
return error;
- }
-
- perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS, 1, regs, address);
destreg = (opcode >> 4) & 0x3f;
if (user_mode(regs)) {
@@ -490,11 +235,10 @@ static int misaligned_load(struct pt_regs *regs,
}
return 0;
-
}
static int misaligned_store(struct pt_regs *regs,
- __u32 opcode,
+ insn_size_t opcode,
int displacement_not_indexed,
int width_shift)
{
@@ -505,11 +249,8 @@ static int misaligned_store(struct pt_regs *regs,
error = generate_and_check_address(regs, opcode,
displacement_not_indexed, width_shift, &address);
- if (error < 0) {
+ if (error < 0)
return error;
- }
-
- perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS, 1, regs, address);
srcreg = (opcode >> 4) & 0x3f;
if (user_mode(regs)) {
@@ -563,13 +304,12 @@ static int misaligned_store(struct pt_regs *regs,
}
return 0;
-
}
/* Never need to fix up misaligned FPU accesses within the kernel since that's a real
error. */
static int misaligned_fpu_load(struct pt_regs *regs,
- __u32 opcode,
+ insn_size_t opcode,
int displacement_not_indexed,
int width_shift,
int do_paired_load)
@@ -581,11 +321,8 @@ static int misaligned_fpu_load(struct pt_regs *regs,
error = generate_and_check_address(regs, opcode,
displacement_not_indexed, width_shift, &address);
- if (error < 0) {
+ if (error < 0)
return error;
- }
-
- perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, address);
destreg = (opcode >> 4) & 0x3f;
if (user_mode(regs)) {
@@ -641,12 +378,10 @@ static int misaligned_fpu_load(struct pt_regs *regs,
die ("Misaligned FPU load inside kernel", regs, 0);
return -1;
}
-
-
}
static int misaligned_fpu_store(struct pt_regs *regs,
- __u32 opcode,
+ insn_size_t opcode,
int displacement_not_indexed,
int width_shift,
int do_paired_load)
@@ -658,11 +393,8 @@ static int misaligned_fpu_store(struct pt_regs *regs,
error = generate_and_check_address(regs, opcode,
displacement_not_indexed, width_shift, &address);
- if (error < 0) {
+ if (error < 0)
return error;
- }
-
- perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, address);
srcreg = (opcode >> 4) & 0x3f;
if (user_mode(regs)) {
@@ -723,11 +455,13 @@ static int misaligned_fpu_store(struct pt_regs *regs,
static int misaligned_fixup(struct pt_regs *regs)
{
- unsigned long opcode;
+ insn_size_t opcode;
int error;
int major, minor;
+ unsigned int user_action;
- if (!user_mode_unaligned_fixup_enable)
+ user_action = unaligned_user_action();
+ if (!(user_action & UM_FIXUP))
return -1;
error = read_opcode(regs->pc, &opcode, user_mode(regs));
@@ -737,23 +471,6 @@ static int misaligned_fixup(struct pt_regs *regs)
major = (opcode >> 26) & 0x3f;
minor = (opcode >> 16) & 0xf;
- if (user_mode(regs) && (user_mode_unaligned_fixup_count > 0)) {
- --user_mode_unaligned_fixup_count;
- /* Only do 'count' worth of these reports, to remove a potential DoS against syslog */
- printk("Fixing up unaligned userspace access in \"%s\" pid=%d pc=0x%08x ins=0x%08lx\n",
- current->comm, task_pid_nr(current), (__u32)regs->pc, opcode);
- } else if (!user_mode(regs) && (kernel_mode_unaligned_fixup_count > 0)) {
- --kernel_mode_unaligned_fixup_count;
- if (in_interrupt()) {
- printk("Fixing up unaligned kernelspace access in interrupt pc=0x%08x ins=0x%08lx\n",
- (__u32)regs->pc, opcode);
- } else {
- printk("Fixing up unaligned kernelspace access in \"%s\" pid=%d pc=0x%08x ins=0x%08lx\n",
- current->comm, task_pid_nr(current), (__u32)regs->pc, opcode);
- }
- }
-
-
switch (major) {
case (0x84>>2): /* LD.W */
error = misaligned_load(regs, opcode, 1, 1, 1);
@@ -878,59 +595,202 @@ static int misaligned_fixup(struct pt_regs *regs)
regs->pc += 4; /* Skip the instruction that's just been emulated */
return 0;
}
+}
+
+static void do_unhandled_exception(int signr, char *str, unsigned long error,
+ struct pt_regs *regs)
+{
+ if (user_mode(regs))
+ force_sig(signr, current);
+ die_if_no_fixup(str, regs, error);
}
-static ctl_table unaligned_table[] = {
- {
- .procname = "kernel_reports",
- .data = &kernel_mode_unaligned_fixup_count,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec
- },
- {
- .procname = "user_reports",
- .data = &user_mode_unaligned_fixup_count,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec
- },
- {
- .procname = "user_enable",
- .data = &user_mode_unaligned_fixup_enable,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec},
- {}
-};
+#define DO_ERROR(signr, str, name) \
+asmlinkage void do_##name(unsigned long error_code, struct pt_regs *regs) \
+{ \
+ do_unhandled_exception(signr, str, error_code, regs); \
+}
-static ctl_table unaligned_root[] = {
- {
- .procname = "unaligned_fixup",
- .mode = 0555,
- .child = unaligned_table
- },
- {}
-};
+DO_ERROR(SIGILL, "illegal slot instruction", illegal_slot_inst)
+DO_ERROR(SIGSEGV, "address error (exec)", address_error_exec)
+
+#if defined(CONFIG_SH64_ID2815_WORKAROUND)
+
+#define OPCODE_INVALID 0
+#define OPCODE_USER_VALID 1
+#define OPCODE_PRIV_VALID 2
-static ctl_table sh64_root[] = {
- {
- .procname = "sh64",
- .mode = 0555,
- .child = unaligned_root
- },
- {}
+/* getcon/putcon - requires checking which control register is referenced. */
+#define OPCODE_CTRL_REG 3
+
+/* Table of valid opcodes for SHmedia mode.
+ Form a 10-bit value by concatenating the major/minor opcodes i.e.
+ opcode[31:26,20:16]. The 6 MSBs of this value index into the following
+ array. The 4 LSBs select the bit-pair in the entry (bits 1:0 correspond to
+ LSBs==4'b0000 etc). */
+static unsigned long shmedia_opcode_table[64] = {
+ 0x55554044,0x54445055,0x15141514,0x14541414,0x00000000,0x10001000,0x01110055,0x04050015,
+ 0x00000444,0xc0000000,0x44545515,0x40405555,0x55550015,0x10005555,0x55555505,0x04050000,
+ 0x00000555,0x00000404,0x00040445,0x15151414,0x00000000,0x00000000,0x00000000,0x00000000,
+ 0x00000055,0x40404444,0x00000404,0xc0009495,0x00000000,0x00000000,0x00000000,0x00000000,
+ 0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,
+ 0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,
+ 0x80005050,0x04005055,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,
+ 0x81055554,0x00000404,0x55555555,0x55555555,0x00000000,0x00000000,0x00000000,0x00000000
};
-static struct ctl_table_header *sysctl_header;
-static int __init init_sysctl(void)
+
+/* Workaround SH5-101 cut2 silicon defect #2815 :
+ in some situations, inter-mode branches from SHcompact -> SHmedia
+ which should take ITLBMISS or EXECPROT exceptions at the target
+ falsely take RESINST at the target instead. */
+void do_reserved_inst(unsigned long error_code, struct pt_regs *regs)
{
- sysctl_header = register_sysctl_table(sh64_root);
- return 0;
+ insn_size_t opcode = 0x6ff4fff0; /* guaranteed reserved opcode */
+ unsigned long pc, aligned_pc;
+ unsigned long index, shift;
+ unsigned long major, minor, combined;
+ unsigned long reserved_field;
+ int opcode_state;
+ int get_user_error;
+ int signr = SIGILL;
+ char *exception_name = "reserved_instruction";
+
+ pc = regs->pc;
+
+ /* SHcompact is not handled */
+ if (unlikely((pc & 3) == 0))
+ goto out;
+
+ /* SHmedia : check for defect. This requires executable vmas
+ to be readable too. */
+ aligned_pc = pc & ~3;
+ if (!access_ok(VERIFY_READ, aligned_pc, sizeof(insn_size_t)))
+ get_user_error = -EFAULT;
+ else
+ get_user_error = __get_user(opcode, (insn_size_t *)aligned_pc);
+
+ if (get_user_error < 0) {
+ /*
+ * Error trying to read opcode. This typically means a
+ * real fault, not a RESINST any more. So change the
+ * codes.
+ */
+ exception_name = "address error (exec)";
+ signr = SIGSEGV;
+ goto out;
+ }
+
+ /* These bits are currently reserved as zero in all valid opcodes */
+ reserved_field = opcode & 0xf;
+ if (unlikely(reserved_field))
+ goto out; /* invalid opcode */
+
+ major = (opcode >> 26) & 0x3f;
+ minor = (opcode >> 16) & 0xf;
+ combined = (major << 4) | minor;
+ index = major;
+ shift = minor << 1;
+ opcode_state = (shmedia_opcode_table[index] >> shift) & 0x3;
+ switch (opcode_state) {
+ case OPCODE_INVALID:
+ /* Trap. */
+ break;
+ case OPCODE_USER_VALID:
+ /*
+ * Restart the instruction: the branch to the instruction
+ * will now be from an RTE not from SHcompact so the
+ * silicon defect won't be triggered.
+ */
+ return;
+ case OPCODE_PRIV_VALID:
+ if (!user_mode(regs)) {
+ /*
+ * Should only ever get here if a module has
+ * SHcompact code inside it. If so, the same fix
+ * up is needed.
+ */
+ return; /* same reason */
+ }
+
+ /*
+ * Otherwise, user mode trying to execute a privileged
+ * instruction - fall through to trap.
+ */
+ break;
+ case OPCODE_CTRL_REG:
+ /* If in privileged mode, return as above. */
+ if (!user_mode(regs))
+ return;
+
+ /* In user mode ... */
+ if (combined == 0x9f) { /* GETCON */
+ unsigned long regno = (opcode >> 20) & 0x3f;
+
+ if (regno >= 62)
+ return;
+
+ /* reserved/privileged control register => trap */
+ } else if (combined == 0x1bf) { /* PUTCON */
+ unsigned long regno = (opcode >> 4) & 0x3f;
+
+ if (regno >= 62)
+ return;
+
+ /* reserved/privileged control register => trap */
+ }
+
+ break;
+ default:
+ /* Fall through to trap. */
+ break;
+ }
+
+out:
+ do_unhandled_exception(signr, exception_name, error_code, regs);
}
-__initcall(init_sysctl);
+#else /* CONFIG_SH64_ID2815_WORKAROUND */
+/* If the workaround isn't needed, this is just a straightforward reserved
+ instruction */
+DO_ERROR(SIGILL, "reserved instruction", reserved_inst)
+
+#endif /* CONFIG_SH64_ID2815_WORKAROUND */
+
+/* Called with interrupts disabled */
+asmlinkage void do_exception_error(unsigned long ex, struct pt_regs *regs)
+{
+ die_if_kernel("exception", regs, ex);
+}
+
+asmlinkage int do_unknown_trapa(unsigned long scId, struct pt_regs *regs)
+{
+ /* Syscall debug */
+ printk("System call ID error: [0x1#args:8 #syscall:16 0x%lx]\n", scId);
+
+ die_if_kernel("unknown trapa", regs, scId);
+
+ return -ENOSYS;
+}
+
+/* Implement misaligned load/store handling for kernel (and optionally for user
+ mode too). Limitation : only SHmedia mode code is handled - there is no
+ handling at all for misaligned accesses occurring in SHcompact code yet. */
+
+asmlinkage void do_address_error_load(unsigned long error_code, struct pt_regs *regs)
+{
+ if (misaligned_fixup(regs) < 0)
+ do_unhandled_exception(SIGSEGV, "address error(load)",
+ error_code, regs);
+}
+
+asmlinkage void do_address_error_store(unsigned long error_code, struct pt_regs *regs)
+{
+ if (misaligned_fixup(regs) < 0)
+ do_unhandled_exception(SIGSEGV, "address error(store)",
+ error_code, regs);
+}
asmlinkage void do_debug_interrupt(unsigned long code, struct pt_regs *regs)
{
@@ -942,10 +802,9 @@ asmlinkage void do_debug_interrupt(unsigned long code, struct pt_regs *regs)
of access we make to them - just go direct to their physical
addresses. */
exp_cause = peek_real_address_q(DM_EXP_CAUSE_PHY);
- if (exp_cause & ~4) {
+ if (exp_cause & ~4)
printk("DM.EXP_CAUSE had unexpected bits set (=%08lx)\n",
(unsigned long)(exp_cause & 0xffffffff));
- }
show_state();
/* Clear all DEBUGINT causes */
poke_real_address_q(DM_EXP_CAUSE_PHY, 0x0);
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-05 15:43:23 +0000