From: "Zhangjian (Bamvor)" <bamvor.zhangjian@huawei.com>
To: Yury Norov <ynorov@caviumnetworks.com>, <arnd@arndb.de>,
<catalin.marinas@arm.com>, <linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <linux-doc@vger.kernel.org>,
<linux-arch@vger.kernel.org>, <linux-s390@vger.kernel.org>,
<libc-alpha@sourceware.org>
Cc: <schwidefsky@de.ibm.com>, <heiko.carstens@de.ibm.com>,
<pinskia@gmail.com>, <broonie@kernel.org>,
<joseph@codesourcery.com>,
<christoph.muellner@theobroma-systems.com>,
<szabolcs.nagy@arm.com>, <klimov.linux@gmail.com>,
<Nathan_Lynch@mentor.com>, <agraf@suse.de>,
<Prasun.Kapoor@caviumnetworks.com>, <kilobyte@angband.pl>,
<geert@linux-m68k.org>, <philipp.tomsich@theobroma-systems.com>,
"Andrew Pinski" <apinski@cavium.com>,
Andrew Pinski <Andrew.Pinski@caviumnetworks.com>,
Hanjun Guo <guohanjun@huawei.com>,
"Zhangjian (Bamvor)" <bamvor.zhangjian@huawei.com>
Subject: Re: [PATCH 21/23] arm64: ilp32: introduce ilp32-specific handlers for sigframe and ucontext
Date: Sun, 12 Jun 2016 20:39:00 +0800 [thread overview]
Message-ID: <575D57E4.6020709@huawei.com> (raw)
In-Reply-To: <1464048292-30136-22-git-send-email-ynorov@caviumnetworks.com>
Hi, Yury
Here is another print issue in this patch:
On 2016/5/24 8:04, Yury Norov wrote:
> From: Andrew Pinski <apinski@cavium.com>
>
> ILP32 uses AARCH32 compat structures and syscall handlers for signals.
> But ILP32 struct rt_sigframe and ucontext differs from both LP64 and
> AARCH32. So some specific mechanism is needed to take care of it.
>
[...]
> diff --git a/arch/arm64/kernel/signal_ilp32.c b/arch/arm64/kernel/signal_ilp32.c
> new file mode 100644
> index 0000000..841e8f8
> --- /dev/null
> +++ b/arch/arm64/kernel/signal_ilp32.c
> @@ -0,0 +1,192 @@
> +/*
[...]
> +asmlinkage long ilp32_sys_rt_sigreturn(struct pt_regs *regs)
> +{
> + struct ilp32_rt_sigframe __user *frame;
> +
> + /* Always make any pending restarted system calls return -EINTR */
> + current->restart_block.fn = do_no_restart_syscall;
> +
> + /*
> + * Since we stacked the signal on a 128-bit boundary,
> + * then 'sp' should be word aligned here. If it's
> + * not, then the user is trying to mess with us.
> + */
> + if (regs->sp & 15)
> + goto badframe;
> +
> + frame = (struct ilp32_rt_sigframe __user *)regs->sp;
> +
> + if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
> + goto badframe;
> +
> + if (restore_ilp32_sigframe(regs, &frame->sig))
> + goto badframe;
> +
> + if (compat_restore_altstack(&frame->sig.uc.uc_stack))
> + goto badframe;
> +
> + return regs->regs[0];
> +
> +badframe:
> + if (show_unhandled_signals)
> + pr_info_ratelimited("%s[%d]: bad frame in %s: pc=%08llx sp=%08llx\n",
> + current->comm, task_pid_nr(current), __func__,
> + regs->pc, regs->compat_sp);
It should be sp instead of compat_sp. The latter one is used by aarch32 EE.
Regards
Bamvor
> + force_sig(SIGSEGV, current);
> + return 0;
> +}
> +
next prev parent reply other threads:[~2016-06-12 12:39 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-24 0:04 [PATCH v6 00/21] ILP32 for ARM64 Yury Norov
2016-05-24 0:04 ` [PATCH 01/23] all: syscall wrappers: add documentation Yury Norov
2016-05-25 19:30 ` David Miller
2016-05-25 20:03 ` Yury Norov
2016-05-25 20:21 ` David Miller
2016-05-25 20:47 ` Arnd Bergmann
2016-05-25 20:50 ` David Miller
2016-05-25 21:01 ` Arnd Bergmann
2016-05-25 21:28 ` David Miller
2016-05-26 14:20 ` Catalin Marinas
2016-05-26 14:50 ` Szabolcs Nagy
2016-05-26 15:19 ` Catalin Marinas
2016-05-26 19:43 ` David Miller
2016-05-27 10:10 ` Catalin Marinas
2016-05-26 20:48 ` Yury Norov
2016-05-26 22:29 ` Catalin Marinas
2016-05-27 0:37 ` Yury Norov
2016-05-27 6:03 ` Heiko Carstens
2016-05-27 8:42 ` Arnd Bergmann
2016-05-27 9:30 ` Catalin Marinas
2016-05-27 10:49 ` Arnd Bergmann
2016-05-27 13:04 ` Catalin Marinas
2016-05-27 16:58 ` Yury Norov
2016-05-27 17:36 ` Catalin Marinas
2016-05-27 9:01 ` Catalin Marinas
2016-06-14 23:08 ` Yury Norov
2016-05-27 5:52 ` Heiko Carstens
2016-05-24 0:04 ` [PATCH 02/23] all: introduce COMPAT_WRAPPER option and enable it for s390 Yury Norov
2016-05-24 0:04 ` [PATCH 03/23] all: s390: move wrapper infrastructure to generic headers Yury Norov
2016-05-24 0:04 ` [PATCH 04/23] all: s390: move compat_wrappers.c from arch/s390/kernel to kernel/ Yury Norov
2016-05-24 0:04 ` [PATCH 05/23] all: wrap needed syscalls in generic unistd Yury Norov
2016-05-24 0:04 ` [PATCH 06/23] compat ABI: use non-compat openat and open_by_handle_at variants Yury Norov
2016-05-24 0:04 ` [PATCH 07/23] 32-bit ABI: introduce ARCH_32BIT_OFF_T config option Yury Norov
2016-05-24 0:04 ` [PATCH 08/23] arm64: ilp32: add documentation on the ILP32 ABI for ARM64 Yury Norov
2016-05-24 0:04 ` [PATCH 09/23] arm64: ensure the kernel is compiled for LP64 Yury Norov
2016-05-24 0:04 ` [PATCH 10/23] arm64: rename COMPAT to AARCH32_EL0 in Kconfig Yury Norov
2016-05-24 0:04 ` [PATCH 11/23] arm64:uapi: set __BITS_PER_LONG correctly for ILP32 and LP64 Yury Norov
2016-05-24 0:04 ` [PATCH 12/23] thread: move thread bits accessors to separated file Yury Norov
2016-05-24 0:04 ` [PATCH 13/23] arm64: introduce is_a32_task and is_a32_thread (for AArch32 compat) Yury Norov
2016-06-12 12:21 ` Zhangjian (Bamvor)
2016-06-12 13:08 ` Zhangjian (Bamvor)
2016-06-12 17:56 ` Yury Norov
2016-05-24 0:04 ` [PATCH 14/23] arm64: ilp32: add is_ilp32_compat_{task,thread} and TIF_32BIT_AARCH64 Yury Norov
2016-05-24 0:04 ` [PATCH 15/23] arm64: introduce binfmt_elf32.c Yury Norov
2016-05-24 0:04 ` [PATCH 16/23] arm64: ilp32: introduce binfmt_ilp32.c Yury Norov
2016-05-26 13:49 ` Zhangjian (Bamvor)
2016-05-26 21:08 ` Yury Norov
2016-06-15 0:40 ` Yury Norov
2016-06-13 3:05 ` Zhangjian (Bamvor)
2016-06-13 13:22 ` Zhangjian (Bamvor)
2016-05-24 0:04 ` [PATCH 17/23] arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32 Yury Norov
2016-06-08 1:34 ` zhouchengming
2016-06-08 17:00 ` Yury Norov
2016-06-25 9:36 ` zhouchengming
2016-06-25 14:15 ` Bamvor Zhang
2016-06-27 2:09 ` zhouchengming
2016-05-24 0:04 ` [PATCH 18/23] arm64: ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it Yury Norov
2016-05-25 20:26 ` Arnd Bergmann
2016-05-24 0:04 ` [PATCH 19/23] arm64: signal: share lp64 signal routines to ilp32 Yury Norov
2016-05-24 0:04 ` [PATCH 20/23] arm64: signal32: move ilp32 and aarch32 common code to separated file Yury Norov
2016-05-24 0:04 ` [PATCH 21/23] arm64: ilp32: introduce ilp32-specific handlers for sigframe and ucontext Yury Norov
2016-06-04 11:34 ` Zhangjian (Bamvor)
2016-06-12 12:34 ` Zhangjian (Bamvor)
2016-06-12 13:12 ` Zhangjian (Bamvor)
2016-06-12 17:44 ` Yury Norov
2016-06-16 11:21 ` Zhangjian (Bamvor)
2016-06-12 12:39 ` Zhangjian (Bamvor) [this message]
2016-05-24 0:04 ` [PATCH 22/23] arm64:ilp32: add vdso-ilp32 and use for signal return Yury Norov
2016-05-24 0:04 ` [PATCH 23/23] arm64:ilp32: add ARM64_ILP32 to Kconfig Yury Norov
2016-05-25 10:42 ` [PATCH v6 00/21] ILP32 for ARM64 Szabolcs Nagy
2016-05-25 16:41 ` Yury Norov
2016-06-02 19:03 ` Yury Norov
2016-06-03 11:02 ` Szabolcs Nagy
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