From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from s3.sipsolutions.net ([2a01:4f8:191:4433::2] helo=sipsolutions.net) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lHTvu-005VSr-8h for linux-um@lists.infradead.org; Wed, 03 Mar 2021 16:01:08 +0000 From: Benjamin Berg Subject: [PATCH 15/27] um: Add generic stub_syscall6 function Date: Wed, 3 Mar 2021 16:55:11 +0100 Message-Id: <20210303155523.124277-16-benjamin@sipsolutions.net> In-Reply-To: <20210303155523.124277-1-benjamin@sipsolutions.net> References: <20210303155523.124277-1-benjamin@sipsolutions.net> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-um" Errors-To: linux-um-bounces+geert=linux-m68k.org@lists.infradead.org To: linux-um@lists.infradead.org Cc: Benjamin Berg This function will be used by the new syscall handling code. Signed-off-by: Benjamin Berg --- arch/x86/um/shared/sysdep/stub_32.h | 22 ++++++++++++++++++++++ arch/x86/um/shared/sysdep/stub_64.h | 16 ++++++++++++++++ 2 files changed, 38 insertions(+) diff --git a/arch/x86/um/shared/sysdep/stub_32.h b/arch/x86/um/shared/sysdep/stub_32.h index d7284dd4a850..3fb8559fe994 100644 --- a/arch/x86/um/shared/sysdep/stub_32.h +++ b/arch/x86/um/shared/sysdep/stub_32.h @@ -79,6 +79,28 @@ static __always_inline long stub_syscall5(long syscall, long arg1, long arg2, return ret; } +static __always_inline long stub_syscall6(long syscall, long arg1, long arg2, + long arg3, long arg4, long arg5, + long arg6) +{ + struct syscall_args { + int ebx, ebp; + } args = { arg1, arg6 }; + long ret; + + __asm__ volatile ("pushl %%ebp;" + "movl 0x4(%%ebx),%%ebp;" + "movl (%%ebx),%%ebx;" + "int $0x80;" + "popl %%ebp" + : "=a" (ret) + : "0" (syscall), "b" (&args), + "c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5) + : "memory"); + + return ret; +} + static __always_inline void trap_myself(void) { __asm("int3"); diff --git a/arch/x86/um/shared/sysdep/stub_64.h b/arch/x86/um/shared/sysdep/stub_64.h index 871c770fc44b..c41ae0462c8f 100644 --- a/arch/x86/um/shared/sysdep/stub_64.h +++ b/arch/x86/um/shared/sysdep/stub_64.h @@ -78,6 +78,22 @@ static __always_inline long stub_syscall5(long syscall, long arg1, long arg2, return ret; } +static __always_inline long stub_syscall6(long syscall, long arg1, long arg2, + long arg3, long arg4, long arg5, + long arg6) +{ + long ret; + + __asm__ volatile ("movq %5,%%r10 ; movq %6,%%r8 ; movq %7,%%r9 ; " + __syscall + : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3), + "g" (arg4), "g" (arg5), "g" (arg6) + : __syscall_clobber, "r10", "r8", "r9"); + + return ret; +} + static __always_inline void trap_myself(void) { __asm("int3"); -- 2.29.2 _______________________________________________ linux-um mailing list linux-um@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-um