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Diffstat (limited to 'arch/mips/kernel')
-rw-r--r--arch/mips/kernel/unaligned.c51
1 files changed, 20 insertions, 31 deletions
diff --git a/arch/mips/kernel/unaligned.c b/arch/mips/kernel/unaligned.c
index 5565b89b98e..d34b1fb3665 100644
--- a/arch/mips/kernel/unaligned.c
+++ b/arch/mips/kernel/unaligned.c
@@ -101,16 +101,14 @@ static u32 unaligned_action;
#endif
extern void show_registers(struct pt_regs *regs);
-static inline int emulate_load_store_insn(struct pt_regs *regs,
- void __user *addr, unsigned int __user *pc,
- unsigned long **regptr, unsigned long *newvalue)
+static void emulate_load_store_insn(struct pt_regs *regs,
+ void __user *addr, unsigned int __user *pc)
{
union mips_instruction insn;
unsigned long value;
unsigned int res;
regs->regs[0] = 0;
- *regptr=NULL;
/*
* This load never faults.
@@ -179,8 +177,8 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
: "r" (addr), "i" (-EFAULT));
if (res)
goto fault;
- *newvalue = value;
- *regptr = &regs->regs[insn.i_format.rt];
+ compute_return_epc(regs);
+ regs->regs[insn.i_format.rt] = value;
break;
case lw_op:
@@ -209,8 +207,8 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
: "r" (addr), "i" (-EFAULT));
if (res)
goto fault;
- *newvalue = value;
- *regptr = &regs->regs[insn.i_format.rt];
+ compute_return_epc(regs);
+ regs->regs[insn.i_format.rt] = value;
break;
case lhu_op:
@@ -243,8 +241,8 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
: "r" (addr), "i" (-EFAULT));
if (res)
goto fault;
- *newvalue = value;
- *regptr = &regs->regs[insn.i_format.rt];
+ compute_return_epc(regs);
+ regs->regs[insn.i_format.rt] = value;
break;
case lwu_op:
@@ -283,8 +281,8 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
: "r" (addr), "i" (-EFAULT));
if (res)
goto fault;
- *newvalue = value;
- *regptr = &regs->regs[insn.i_format.rt];
+ compute_return_epc(regs);
+ regs->regs[insn.i_format.rt] = value;
break;
#endif /* CONFIG_64BIT */
@@ -325,8 +323,8 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
: "r" (addr), "i" (-EFAULT));
if (res)
goto fault;
- *newvalue = value;
- *regptr = &regs->regs[insn.i_format.rt];
+ compute_return_epc(regs);
+ regs->regs[insn.i_format.rt] = value;
break;
#endif /* CONFIG_64BIT */
@@ -367,6 +365,7 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
: "r" (value), "r" (addr), "i" (-EFAULT));
if (res)
goto fault;
+ compute_return_epc(regs);
break;
case sw_op:
@@ -397,6 +396,7 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
: "r" (value), "r" (addr), "i" (-EFAULT));
if (res)
goto fault;
+ compute_return_epc(regs);
break;
case sd_op:
@@ -435,6 +435,7 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
: "r" (value), "r" (addr), "i" (-EFAULT));
if (res)
goto fault;
+ compute_return_epc(regs);
break;
#endif /* CONFIG_64BIT */
@@ -473,34 +474,31 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
unaligned_instructions++;
#endif
- return 0;
+ return;
fault:
/* Did we have an exception handler installed? */
if (fixup_exception(regs))
- return 1;
+ return;
die_if_kernel ("Unhandled kernel unaligned access", regs);
send_sig(SIGSEGV, current, 1);
- return 0;
+ return;
sigbus:
die_if_kernel("Unhandled kernel unaligned access", regs);
send_sig(SIGBUS, current, 1);
- return 0;
+ return;
sigill:
die_if_kernel("Unhandled kernel unaligned access or invalid instruction", regs);
send_sig(SIGILL, current, 1);
-
- return 0;
}
asmlinkage void do_ade(struct pt_regs *regs)
{
- unsigned long *regptr, newval;
extern int do_dsemulret(struct pt_regs *);
unsigned int __user *pc;
mm_segment_t seg;
@@ -538,16 +536,7 @@ asmlinkage void do_ade(struct pt_regs *regs)
seg = get_fs();
if (!user_mode(regs))
set_fs(KERNEL_DS);
- if (!emulate_load_store_insn(regs, (void __user *)regs->cp0_badvaddr, pc,
- &regptr, &newval)) {
- compute_return_epc(regs);
- /*
- * Now that branch is evaluated, update the dest
- * register if necessary
- */
- if (regptr)
- *regptr = newval;
- }
+ emulate_load_store_insn(regs, (void __user *)regs->cp0_badvaddr, pc);
set_fs(seg);
return;