aboutsummaryrefslogtreecommitdiff
path: root/arch/sparc64/kernel/unaligned.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sparc64/kernel/unaligned.c')
-rw-r--r--arch/sparc64/kernel/unaligned.c53
1 files changed, 28 insertions, 25 deletions
diff --git a/arch/sparc64/kernel/unaligned.c b/arch/sparc64/kernel/unaligned.c
index 42718f6a7d3..70faf630603 100644
--- a/arch/sparc64/kernel/unaligned.c
+++ b/arch/sparc64/kernel/unaligned.c
@@ -180,14 +180,14 @@ static void __attribute_used__ unaligned_panic(char *str, struct pt_regs *regs)
die_if_kernel(str, regs);
}
-extern void do_int_load(unsigned long *dest_reg, int size,
- unsigned long *saddr, int is_signed, int asi);
+extern int do_int_load(unsigned long *dest_reg, int size,
+ unsigned long *saddr, int is_signed, int asi);
-extern void __do_int_store(unsigned long *dst_addr, int size,
- unsigned long src_val, int asi);
+extern int __do_int_store(unsigned long *dst_addr, int size,
+ unsigned long src_val, int asi);
-static inline void do_int_store(int reg_num, int size, unsigned long *dst_addr,
- struct pt_regs *regs, int asi, int orig_asi)
+static inline int do_int_store(int reg_num, int size, unsigned long *dst_addr,
+ struct pt_regs *regs, int asi, int orig_asi)
{
unsigned long zero = 0;
unsigned long *src_val_p = &zero;
@@ -219,7 +219,7 @@ static inline void do_int_store(int reg_num, int size, unsigned long *dst_addr,
break;
};
}
- __do_int_store(dst_addr, size, src_val, asi);
+ return __do_int_store(dst_addr, size, src_val, asi);
}
static inline void advance(struct pt_regs *regs)
@@ -242,14 +242,14 @@ static inline int ok_for_kernel(unsigned int insn)
return !floating_point_load_or_store_p(insn);
}
-void kernel_mna_trap_fault(void)
+static void kernel_mna_trap_fault(void)
{
struct pt_regs *regs = current_thread_info()->kern_una_regs;
unsigned int insn = current_thread_info()->kern_una_insn;
- unsigned long g2 = regs->u_regs[UREG_G2];
- unsigned long fixup = search_extables_range(regs->tpc, &g2);
+ const struct exception_table_entry *entry;
- if (!fixup) {
+ entry = search_exception_tables(regs->tpc);
+ if (!entry) {
unsigned long address;
address = compute_effective_address(regs, insn,
@@ -270,9 +270,8 @@ void kernel_mna_trap_fault(void)
die_if_kernel("Oops", regs);
/* Not reached */
}
- regs->tpc = fixup;
+ regs->tpc = entry->fixup;
regs->tnpc = regs->tpc + 4;
- regs->u_regs [UREG_G2] = g2;
regs->tstate &= ~TSTATE_ASI;
regs->tstate |= (ASI_AIUS << 24UL);
@@ -294,8 +293,8 @@ asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn, u
kernel_mna_trap_fault();
} else {
- unsigned long addr;
- int orig_asi, asi;
+ unsigned long addr, *reg_addr;
+ int orig_asi, asi, err;
addr = compute_effective_address(regs, insn,
((insn >> 25) & 0x1f));
@@ -319,11 +318,12 @@ asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn, u
};
switch (dir) {
case load:
- do_int_load(fetch_reg_addr(((insn>>25)&0x1f), regs),
- size, (unsigned long *) addr,
- decode_signedness(insn), asi);
- if (unlikely(asi != orig_asi)) {
- unsigned long val_in = *(unsigned long *) addr;
+ reg_addr = fetch_reg_addr(((insn>>25)&0x1f), regs);
+ err = do_int_load(reg_addr, size,
+ (unsigned long *) addr,
+ decode_signedness(insn), asi);
+ if (likely(!err) && unlikely(asi != orig_asi)) {
+ unsigned long val_in = *reg_addr;
switch (size) {
case 2:
val_in = swab16(val_in);
@@ -339,21 +339,24 @@ asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn, u
BUG();
break;
};
- *(unsigned long *) addr = val_in;
+ *reg_addr = val_in;
}
break;
case store:
- do_int_store(((insn>>25)&0x1f), size,
- (unsigned long *) addr, regs,
- asi, orig_asi);
+ err = do_int_store(((insn>>25)&0x1f), size,
+ (unsigned long *) addr, regs,
+ asi, orig_asi);
break;
default:
panic("Impossible kernel unaligned trap.");
/* Not reached... */
}
- advance(regs);
+ if (unlikely(err))
+ kernel_mna_trap_fault();
+ else
+ advance(regs);
}
}