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authorQiaowei Ren <qiaowei.ren@intel.com>2014-11-14 07:18:19 -0800
committerThomas Gleixner <tglx@linutronix.de>2014-11-18 00:58:53 +0100
commitee1b58d36aa1b5a79eaba11f5c3633c88231da83 (patch)
treec27ee172205f77faf191d3112b5a88d688c722c4 /include/uapi/asm-generic/siginfo.h
parent62e7759b1bdaf9b753c3724a56fcbe3235ebd5f3 (diff)
mpx: Extend siginfo structure to include bound violation information
This patch adds new fields about bound violation into siginfo structure. si_lower and si_upper are respectively lower bound and upper bound when bound violation is caused. Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: linux-mm@kvack.org Cc: linux-mips@linux-mips.org Cc: Dave Hansen <dave@sr71.net> Link: http://lkml.kernel.org/r/20141114151819.1908C900@viggo.jf.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/uapi/asm-generic/siginfo.h')
-rw-r--r--include/uapi/asm-generic/siginfo.h9
1 files changed, 8 insertions, 1 deletions
diff --git a/include/uapi/asm-generic/siginfo.h b/include/uapi/asm-generic/siginfo.h
index ba5be7fdbdfe..1e3552037a5a 100644
--- a/include/uapi/asm-generic/siginfo.h
+++ b/include/uapi/asm-generic/siginfo.h
@@ -91,6 +91,10 @@ typedef struct siginfo {
int _trapno; /* TRAP # which caused the signal */
#endif
short _addr_lsb; /* LSB of the reported address */
+ struct {
+ void __user *_lower;
+ void __user *_upper;
+ } _addr_bnd;
} _sigfault;
/* SIGPOLL */
@@ -131,6 +135,8 @@ typedef struct siginfo {
#define si_trapno _sifields._sigfault._trapno
#endif
#define si_addr_lsb _sifields._sigfault._addr_lsb
+#define si_lower _sifields._sigfault._addr_bnd._lower
+#define si_upper _sifields._sigfault._addr_bnd._upper
#define si_band _sifields._sigpoll._band
#define si_fd _sifields._sigpoll._fd
#ifdef __ARCH_SIGSYS
@@ -199,7 +205,8 @@ typedef struct siginfo {
*/
#define SEGV_MAPERR (__SI_FAULT|1) /* address not mapped to object */
#define SEGV_ACCERR (__SI_FAULT|2) /* invalid permissions for mapped object */
-#define NSIGSEGV 2
+#define SEGV_BNDERR (__SI_FAULT|3) /* failed address bound checks */
+#define NSIGSEGV 3
/*
* SIGBUS si_codes

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