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ARC: unaligned access emulation error handling consolidation 

If CONFIG_ARC_MISALIGN_ACCESS is not enabled, or if the fixup fails,
call the same error handler: same signal/si_code to user (SIGBUS)

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2013-04-04 14:37:52 +05:30
parent bd3c8b11ec
commit c723ea4620
2 changed files with 5 additions and 14 deletions
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4
arch/arc/kernel/entry.S
View File

@ -393,12 +393,12 @@ ARC_ENTRY EV_TLBProtV
#ifdef CONFIG_ARC_MISALIGN_ACCESS
SAVE_CALLEE_SAVED_USER
mov r3, sp ; callee_regs
#endif
bl do_misaligned_access
#ifdef CONFIG_ARC_MISALIGN_ACCESS
DISCARD_CALLEE_SAVED_USER
#else
bl do_misaligned_error
#endif
b ret_from_exception

15
arch/arc/kernel/traps.c
View File

@ -84,6 +84,7 @@ DO_ERROR_INFO(SIGILL, "Invalid Extn Insn", do_extension_fault, ILL_ILLOPC)
DO_ERROR_INFO(SIGILL, "Illegal Insn (or Seq)", insterror_is_error, ILL_ILLOPC)
DO_ERROR_INFO(SIGBUS, "Invalid Mem Access", do_memory_error, BUS_ADRERR)
DO_ERROR_INFO(SIGTRAP, "Breakpoint Set", trap_is_brkpt, TRAP_BRKPT)
DO_ERROR_INFO(SIGBUS, "Misaligned Access", do_misaligned_error, BUS_ADRALN)
#ifdef CONFIG_ARC_MISALIGN_ACCESS
/*
@ -92,21 +93,11 @@ DO_ERROR_INFO(SIGTRAP, "Breakpoint Set", trap_is_brkpt, TRAP_BRKPT)
int do_misaligned_access(unsigned long cause, unsigned long address,
struct pt_regs *regs, struct callee_regs *cregs)
{
if (misaligned_fixup(address, regs, cause, cregs) != 0) {
siginfo_t info;
if (misaligned_fixup(address, regs, cause, cregs) != 0)
return do_misaligned_error(cause, address, regs);
info.si_signo = SIGBUS;
info.si_errno = 0;
info.si_code = BUS_ADRALN;
info.si_addr = (void __user *)address;
return handle_exception(cause, "Misaligned Access", regs,
&info);
}
return 0;
}
#else
DO_ERROR_INFO(SIGSEGV, "Misaligned Access", do_misaligned_access, SEGV_ACCERR)
#endif
/*