From 9f2fec8ec46e47f04673276363af290ddfef1b89 Mon Sep 17 00:00:00 2001 From: AKASHI Takahiro Date: Thu, 21 Aug 2014 17:56:44 +0900 Subject: [PATCH 11/12] arm64: add SIGSYS siginfo for compat task SIGSYS is primarily used in secure computing to notify tracer. This patch allows signal handler on compat task to get correct information with SA_SYSINFO specified when this signal is delivered. Signed-off-by: AKASHI Takahiro Reviewed-by: Kees Cook --- arch/arm64/include/asm/compat.h | 7 +++++++ arch/arm64/kernel/signal32.c | 8 ++++++++ 2 files changed, 15 insertions(+) diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h index 56de5aadede2..e94e8dde78b4 100644 --- a/arch/arm64/include/asm/compat.h +++ b/arch/arm64/include/asm/compat.h @@ -205,6 +205,13 @@ typedef struct compat_siginfo { compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ int _fd; } _sigpoll; + + /* SIGSYS */ + struct { + compat_uptr_t _call_addr; /* calling user insn */ + int _syscall; /* triggering system call number */ + unsigned int _arch; /* AUDIT_ARCH_* of syscall */ + } _sigsys; } _sifields; } compat_siginfo_t; diff --git a/arch/arm64/kernel/signal32.c b/arch/arm64/kernel/signal32.c index 327a68c915e2..2b53747bc87f 100644 --- a/arch/arm64/kernel/signal32.c +++ b/arch/arm64/kernel/signal32.c @@ -186,6 +186,14 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from) err |= __put_user(from->si_uid, &to->si_uid); err |= __put_user(from->si_int, &to->si_int); break; +#ifdef __ARCH_SIGSYS + case __SI_SYS: + err |= __put_user((compat_uptr_t)(unsigned long) + from->si_call_addr, &to->si_call_addr); + err |= __put_user(from->si_syscall, &to->si_syscall); + err |= __put_user(from->si_arch, &to->si_arch); + break; +#endif default: /* this is just in case for now ... */ err |= __put_user(from->si_pid, &to->si_pid); err |= __put_user(from->si_uid, &to->si_uid); -- 2.19.0