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authorVineet Gupta <vgupta@synopsys.com>2013-04-04 14:37:52 +0530
committerVineet Gupta <vgupta@synopsys.com>2013-05-07 13:43:55 +0530
commitc723ea4620a67fb0dbed5f5c33183543799e2177 (patch)
tree19ee9abf49caa767017d41d2a337d8f174a8a87f /arch/arc/kernel
parentbd3c8b11eccddd311c9e6a56aa00c1af24ea5958 (diff)
downloadvexpress-lsk-c723ea4620a67fb0dbed5f5c33183543799e2177.tar.gz
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>
Diffstat (limited to 'arch/arc/kernel')
-rw-r--r--arch/arc/kernel/entry.S4
-rw-r--r--arch/arc/kernel/traps.c17
2 files changed, 6 insertions, 15 deletions
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S
index 91eeab81f52..666a486f1e7 100644
--- a/arch/arc/kernel/entry.S
+++ b/arch/arc/kernel/entry.S
@@ -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
diff --git a/arch/arc/kernel/traps.c b/arch/arc/kernel/traps.c
index 74839d10d80..0471d9c9dd5 100644
--- a/arch/arc/kernel/traps.c
+++ b/arch/arc/kernel/traps.c
@@ -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;
-
- 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);
- }
+ if (misaligned_fixup(address, regs, cause, cregs) != 0)
+ return do_misaligned_error(cause, address, regs);
+
return 0;
}
-
-#else
-DO_ERROR_INFO(SIGSEGV, "Misaligned Access", do_misaligned_access, SEGV_ACCERR)
#endif
/*