Messages in this thread Patch in this message | | | From | Khalid Aziz <> | Subject | [PATCH v11 01/10] signals, sparc: Add signal codes for ADI violations | Date | Thu, 1 Feb 2018 11:01:09 -0700 |
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SPARC M7 processor introduces a new feature - Application Data Integrity (ADI). ADI allows MMU to catch rogue accesses to memory. When a rogue access occurs, MMU blocks the access and raises an exception. In response to the exception, kernel sends the offending task a SIGSEGV with si_code that indicates the nature of exception. This patch adds three new signal codes specific to ADI feature:
1. ADI is not enabled for the address and task attempted to access memory using ADI 2. Task attempted to access memory using wrong ADI tag and caused a deferred exception. 3. Task attempted to access memory using wrong ADI tag and caused a precise exception.
Signed-off-by: Khalid Aziz <khalid.aziz@oracle.com> Cc: Khalid Aziz <khalid@gonehiking.org> Reviewed-by: Anthony Yznaga <anthony.yznaga@oracle.com> --- v10: - Updated si_code definitions to match other definitions
arch/x86/kernel/signal_compat.c | 2 +- include/uapi/asm-generic/siginfo.h | 5 ++++- 2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/signal_compat.c b/arch/x86/kernel/signal_compat.c index 8c6da1a643da..20be1bc923f9 100644 --- a/arch/x86/kernel/signal_compat.c +++ b/arch/x86/kernel/signal_compat.c @@ -27,7 +27,7 @@ static inline void signal_compat_build_tests(void) */ BUILD_BUG_ON(NSIGILL != 8); BUILD_BUG_ON(NSIGFPE != 8); - BUILD_BUG_ON(NSIGSEGV != 4); + BUILD_BUG_ON(NSIGSEGV != 7); BUILD_BUG_ON(NSIGBUS != 5); BUILD_BUG_ON(NSIGTRAP != 4); BUILD_BUG_ON(NSIGCHLD != 6); diff --git a/include/uapi/asm-generic/siginfo.h b/include/uapi/asm-generic/siginfo.h index e447283b8f52..279b7c0d2977 100644 --- a/include/uapi/asm-generic/siginfo.h +++ b/include/uapi/asm-generic/siginfo.h @@ -202,7 +202,10 @@ typedef struct siginfo { #define SEGV_ACCERR 2 /* invalid permissions for mapped object */ #define SEGV_BNDERR 3 /* failed address bound checks */ #define SEGV_PKUERR 4 /* failed protection key checks */ -#define NSIGSEGV 4 +#define SEGV_ACCADI 5 /* ADI not enabled for mapped object */ +#define SEGV_ADIDERR 6 /* Disrupting MCD error */ +#define SEGV_ADIPERR 7 /* Precise MCD exception */ +#define NSIGSEGV 7 /* * SIGBUS si_codes -- 2.11.0
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