From: Michael Ellerman <mpe@ellerman.id.au>
To: <linuxppc-dev@ozlabs.org>
Cc: <linux-kernel@vger.kernel.org>,
keescook@chromium.org, luto@amacapital.net, wad@chromium.org,
strosake@linux.vnet.ibm.com, bogdan.purcareata@freescale.com
Subject: [RFC PATCH 01/12] powerpc/kernel: Get pt_regs from r9 before calling do_syscall_trace_enter()
Date: Wed, 15 Jul 2015 17:37:03 +1000 [thread overview]
Message-ID: <1436945834-26660-1-git-send-email-mpe@ellerman.id.au> (raw)
To call do_syscall_trace_enter() we need pt_regs in r3, but we don't need
to recalculate it based on r1, it's already in r9.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/kernel/entry_64.S | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 579e0f9a2d57..0796c487d3db 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -243,7 +243,9 @@ syscall_error:
/* Traced system call support */
syscall_dotrace:
bl save_nvgprs
- addi r3,r1,STACK_FRAME_OVERHEAD
+
+ /* Get pt_regs into r3 */
+ mr r3, r9
bl do_syscall_trace_enter
/*
* Restore argument registers possibly just changed.
--
2.1.0
next reply other threads:[~2015-07-15 7:37 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-15 7:37 Michael Ellerman [this message]
2015-07-15 7:37 ` [RFC PATCH 02/12] powerpc/kernel: Switch to using MAX_ERRNO Michael Ellerman
2015-07-16 22:42 ` Benjamin Herrenschmidt
2015-07-15 7:37 ` [RFC PATCH 03/12] powerpc/kernel: Change the do_syscall_trace_enter() API Michael Ellerman
2015-07-15 7:37 ` [RFC PATCH 04/12] powerpc: Drop unused syscall_get_error() Michael Ellerman
2015-07-15 7:37 ` [RFC PATCH 05/12] powerpc: Don't negate error in syscall_set_return_value() Michael Ellerman
2015-07-15 7:37 ` [RFC PATCH 06/12] powerpc: Rework syscall_get_arguments() so there is only one loop Michael Ellerman
2015-07-15 7:37 ` [RFC PATCH 07/12] powerpc: Use orig_gpr3 in syscall_get_arguments() Michael Ellerman
2015-07-15 7:37 ` [RFC PATCH 08/12] powerpc: Change syscall_get_nr() to return int Michael Ellerman
2015-07-15 7:37 ` [RFC PATCH 09/12] powerpc/kernel: Add SIG_SYS support for compat tasks Michael Ellerman
2015-07-15 15:12 ` Kees Cook
2015-07-16 3:38 ` Michael Ellerman
2015-07-15 7:37 ` [RFC PATCH 10/12] powerpc/kernel: Enable seccomp filter Michael Ellerman
2015-07-15 7:37 ` [RFC PATCH 11/12] selftests/seccomp: Make seccomp tests work on big endian Michael Ellerman
2015-07-15 15:16 ` Kees Cook
2015-07-16 3:41 ` Michael Ellerman
2015-07-15 7:37 ` [RFC PATCH 12/12] selftests/seccomp: Add powerpc support Michael Ellerman
2015-07-15 15:16 ` Kees Cook
2015-07-16 22:40 ` [RFC PATCH 01/12] powerpc/kernel: Get pt_regs from r9 before calling do_syscall_trace_enter() Benjamin Herrenschmidt
2015-07-17 4:41 ` Michael Ellerman
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