> -----Original Message----- > From: owner-linux...@kvack.org [mailto:owner-linux...@kvack.org] On > Behalf Of Qiaowei Ren > Sent: Monday, July 21, 2014 1:39 PM > To: H. Peter Anvin; Thomas Gleixner; Ingo Molnar; Hansen, Dave > Cc: x...@kernel.org; linux-kernel@vger.kernel.org; linux...@kvack.org; Ren, > Qiaowei > Subject: [PATCH v7 05/10] x86, 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....@intel.com> > --- > include/uapi/asm-generic/siginfo.h | 9 ++++++++- > kernel/signal.c | 4 ++++ > 2 files changed, 12 insertions(+), 1 deletions(-) > > diff --git a/include/uapi/asm-generic/siginfo.h > b/include/uapi/asm-generic/siginfo.h > index ba5be7f..1e35520 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 > diff --git a/kernel/signal.c b/kernel/signal.c index a4077e9..2131636 100644 > --- a/kernel/signal.c > +++ b/kernel/signal.c > @@ -2748,6 +2748,10 @@ int copy_siginfo_to_user(siginfo_t __user *to, > const siginfo_t *from) > if (from->si_code == BUS_MCEERR_AR || from->si_code == > BUS_MCEERR_AO) > err |= __put_user(from->si_addr_lsb, &to->si_addr_lsb); > #endif > +#ifdef SEGV_BNDERR > + err |= __put_user(from->si_lower, &to->si_lower); > + err |= __put_user(from->si_upper, &to->si_upper); #endif
"#endif" should be in a new line. > break; > case __SI_CHLD: > err |= __put_user(from->si_pid, &to->si_pid); > -- > 1.7.1 > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to > majord...@kvack.org. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Don't email: <a href=mailto:"d...@kvack.org";> em...@kvack.org </a> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
