ARM: 6252/1: Use SIGBUS for unaligned access instead of SIGILL

POSIX specify to use signal SIGBUS with code BUS_ADRALN for invalid
address alignment.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mm/alignment.c b/arch/arm/mm/alignment.c
index 6f98c35..53a6096 100644 (file)
--- a/arch/arm/mm/alignment.c
+++ b/arch/arm/mm/alignment.c
@@ -924,8 +924,8 @@ static int __init alignment_init(void)
                ai_usermode = UM_FIXUP;
        }
 
-       hook_fault_code(1, do_alignment, SIGILL, "alignment exception");
-       hook_fault_code(3, do_alignment, SIGILL, "alignment exception");
+       hook_fault_code(1, do_alignment, SIGBUS, "alignment exception");
+       hook_fault_code(3, do_alignment, SIGBUS, "alignment exception");
 
        return 0;
 }

diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index cbfb2ed..ce6f3a4 100644 (file)
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -463,9 +463,9 @@ static struct fsr_info {
         * defines these to be "precise" aborts.
         */
        { do_bad,               SIGSEGV, 0,             "vector exception"                 },
-       { do_bad,               SIGILL,  BUS_ADRALN,    "alignment exception"              },
+       { do_bad,               SIGBUS,  BUS_ADRALN,    "alignment exception"              },
        { do_bad,               SIGKILL, 0,             "terminal exception"               },
-       { do_bad,               SIGILL,  BUS_ADRALN,    "alignment exception"              },
+       { do_bad,               SIGBUS,  BUS_ADRALN,    "alignment exception"              },
 /* Do we need runtime check ? */
 #if __LINUX_ARM_ARCH__ < 6
        { do_bad,               SIGBUS,  0,             "external abort on linefetch"      },