Commit 9a4af027 authored by Andre Draszik's avatar Andre Draszik Committed by Paul Mundt
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sh: ratelimit unaligned fixups 



This patch makes sure we see messages about unaligned access fixups
every now and then. Else especially userspace apps suffering from
bad programming won't ever be noticed...

Signed-off by: Andre Draszik <andre.draszik@st.com>
Signed-off-by: default avatarStuart Menefy <stuart.menefy@st.com>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent c3144fc4

arch/sh/kernel/traps_32.c

+4 −13
Original line number Diff line number Diff line
@@ -359,13 +359,6 @@ static inline int handle_delayslot(struct pt_regs *regs, 
#define SH_PC_8BIT_OFFSET(instr) ((((signed char)(instr))*2) + 4)

#define SH_PC_12BIT_OFFSET(instr) ((((signed short)(instr<<4))>>3) + 4)



/*

 * XXX: SH-2A needs this too, but it needs an overhaul thanks to mixed 32-bit

 * opcodes..

 */



static int handle_unaligned_notify_count = 10;



int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,

			    struct mem_access *ma)

{
@@ -375,15 +368,13 @@ int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs, 
	index = (instruction>>8)&15;	/* 0x0F00 */

	rm = regs->regs[index];



	/* shout about the first ten userspace fixups */

	if (user_mode(regs) && handle_unaligned_notify_count>0) {

		handle_unaligned_notify_count--;



		printk(KERN_NOTICE "Fixing up unaligned userspace access "

	/* shout about fixups */

	if (printk_ratelimit())

		printk(KERN_NOTICE "Fixing up unaligned %s access "

		       "in \"%s\" pid=%d pc=0x%p ins=0x%04hx\n",

		       user_mode(regs) ? "userspace" : "kernel",

		       current->comm, task_pid_nr(current),

		       (void *)regs->pc, instruction);

	}



	ret = -EFAULT;

	switch (instruction&0xF000) {