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Diffstat (limited to 'arch/sh/kernel/traps_32.c')
-rw-r--r--arch/sh/kernel/traps_32.c189
1 files changed, 48 insertions, 141 deletions
diff --git a/arch/sh/kernel/traps_32.c b/arch/sh/kernel/traps_32.c
index 3484c2f65ab..ff639342a8b 100644
--- a/arch/sh/kernel/traps_32.c
+++ b/arch/sh/kernel/traps_32.c
@@ -16,21 +16,20 @@
#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>
#include <linux/perf_event.h>
-#include <asm/system.h>
#include <asm/alignment.h>
#include <asm/fpu.h>
#include <asm/kprobes.h>
+#include <asm/traps.h>
+#include <asm/bl_bit.h>
#ifdef CONFIG_CPU_SH2
# define TRAP_RESERVED_INST 4
@@ -47,103 +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);
- sysfs_printk_last_file();
- 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__
@@ -317,6 +219,35 @@ static int handle_unaligned_ins(insn_size_t instruction, struct pt_regs *regs,
break;
}
break;
+
+ case 9: /* mov.w @(disp,PC),Rn */
+ srcu = (unsigned char __user *)regs->pc;
+ srcu += 4;
+ srcu += (instruction & 0x00FF) << 1;
+ dst = (unsigned char *)rn;
+ *(unsigned long *)dst = 0;
+
+#if !defined(__LITTLE_ENDIAN__)
+ dst += 2;
+#endif
+
+ if (ma->from(dst, srcu, 2))
+ goto fetch_fault;
+ sign_extend(2, dst);
+ ret = 0;
+ break;
+
+ case 0xd: /* mov.l @(disp,PC),Rn */
+ srcu = (unsigned char __user *)(regs->pc & ~0x3);
+ srcu += 4;
+ srcu += (instruction & 0x00FF) << 2;
+ dst = (unsigned char *)rn;
+ *(unsigned long *)dst = 0;
+
+ if (ma->from(dst, srcu, 4))
+ goto fetch_fault;
+ ret = 0;
+ break;
}
return ret;
@@ -394,7 +325,7 @@ int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
*/
if (!expected) {
unaligned_fixups_notify(current, instruction, regs);
- perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS, 1, 0,
+ perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS, 1,
regs, address);
}
@@ -467,6 +398,7 @@ int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
case 0x0500: /* mov.w @(disp,Rm),R0 */
goto simple;
case 0x0B00: /* bf lab - no delayslot*/
+ ret = 0;
break;
case 0x0F00: /* bf/s lab */
ret = handle_delayslot(regs, instruction, ma);
@@ -480,6 +412,7 @@ int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
}
break;
case 0x0900: /* bt lab - no delayslot */
+ ret = 0;
break;
case 0x0D00: /* bt/s lab */
ret = handle_delayslot(regs, instruction, ma);
@@ -495,6 +428,9 @@ int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
}
break;
+ case 0x9000: /* mov.w @(disp,Rm),Rn */
+ goto simple;
+
case 0xA000: /* bra label */
ret = handle_delayslot(regs, instruction, ma);
if (ret==0)
@@ -508,6 +444,9 @@ int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
regs->pc += SH_PC_12BIT_OFFSET(instruction);
}
break;
+
+ case 0xD000: /* mov.l @(disp,Rm),Rn */
+ goto simple;
}
return ret;
@@ -655,9 +594,7 @@ int is_dsp_inst(struct pt_regs *regs)
#endif /* CONFIG_SH_DSP */
#ifdef CONFIG_CPU_SH2A
-asmlinkage void do_divide_error(unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs __regs)
+asmlinkage void do_divide_error(unsigned long r4)
{
siginfo_t info;
@@ -674,11 +611,9 @@ asmlinkage void do_divide_error(unsigned long r4, unsigned long r5,
}
#endif
-asmlinkage void do_reserved_inst(unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs __regs)
+asmlinkage void do_reserved_inst(void)
{
- struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
+ struct pt_regs *regs = current_pt_regs();
unsigned long error_code;
struct task_struct *tsk = current;
@@ -762,11 +697,9 @@ static int emulate_branch(unsigned short inst, struct pt_regs *regs)
}
#endif
-asmlinkage void do_illegal_slot_inst(unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs __regs)
+asmlinkage void do_illegal_slot_inst(void)
{
- struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
+ struct pt_regs *regs = current_pt_regs();
unsigned long inst;
struct task_struct *tsk = current;
@@ -791,18 +724,15 @@ asmlinkage void do_illegal_slot_inst(unsigned long r4, unsigned long r5,
die_if_no_fixup("illegal slot instruction", regs, inst);
}
-asmlinkage void do_exception_error(unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs __regs)
+asmlinkage void do_exception_error(void)
{
- struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
long ex;
ex = lookup_exception_vector();
- die_if_kernel("exception", regs, ex);
+ die_if_kernel("exception", current_pt_regs(), ex);
}
-void __cpuinit per_cpu_trap_init(void)
+void per_cpu_trap_init(void)
{
extern void *vbr_base;
@@ -863,26 +793,3 @@ 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);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 19:21:32 +0000