From patchwork Tue Jan 7 23:04:00 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Dmitry V. Levin" X-Patchwork-Id: 13929714 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3E91CE77198 for ; Tue, 7 Jan 2025 23:09:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:References: List-Owner; bh=jfitusRGBHtgUQJJHtru2BOu0/U/XBgtS+dyh+B8grg=; b=nzxF1ZesymDVp6 SafiMZKORtrI0LYpM4XGpAaZurLIsn6RmhEKTK6Lvr3EYhPUdFG5CSzBEBf+JeXcktfUI8rQx9Prh lYM2glRSl6nPIws3/UkVpQifzgYkLnNm6C3zlXgH3wjO+amUbstLvrhlCyD3xbDbb9dySImbQ/61y 94iNuNHEx90SkSpPdFTIS82JDjVQ5jQXhN7kh2xRQk/+l02Um+d846Y9m8ykMCpVvrwEn/2sbCnXC u6Gar8SezAxyx0fu5m67loGKPptfggIs3Y/2bfGq9MQTyhibi90cXVy0ZZ16RDGECmGYkbnskK4+t 4u7H4penbl/z7NbJhzDQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tVIgt-00000006Uge-1jrg; Tue, 07 Jan 2025 23:08:51 +0000 Received: from vmicros1.altlinux.org ([194.107.17.57]) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tVIcD-00000006Tp8-1349; Tue, 07 Jan 2025 23:04:02 +0000 Received: from mua.local.altlinux.org (mua.local.altlinux.org [192.168.1.14]) by vmicros1.altlinux.org (Postfix) with ESMTP id 517C872C8FB; Wed, 8 Jan 2025 02:04:00 +0300 (MSK) Received: by mua.local.altlinux.org (Postfix, from userid 508) id 404667CCB3A; Wed, 8 Jan 2025 01:04:00 +0200 (IST) Date: Wed, 8 Jan 2025 01:04:00 +0200 From: "Dmitry V. Levin" To: Oleg Nesterov Cc: Eugene Syromyatnikov , Mike Frysinger , Renzo Davoli , Davide Berardi , strace-devel@lists.strace.io, Dinh Nguyen , Jonas Bonn , Stefan Kristiansson , Stafford Horne , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Naveen N Rao , Madhavan Srinivasan , Paul Walmsley , Palmer Dabbelt , Albert Ou , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Yoshinori Sato , Rich Felker , John Paul Adrian Glaubitz , "David S. Miller" , Andreas Larsson , Richard Weinberger , Anton Ivanov , Johannes Berg , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Chris Zankel , Max Filippov , Arnd Bergmann , linux-kernel@vger.kernel.org, linux-openrisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-arch@vger.kernel.org Subject: [PATCH 1/6] Revert "arch: remove unused function syscall_set_arguments()" Message-ID: <20250107230359.GA30633@strace.io> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20250107230153.GA30560@strace.io> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250107_150401_625020_C76D6AC4 X-CRM114-Status: GOOD ( 18.59 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org syscall_set_arguments() is going to be needed to implement PTRACE_SET_SYSCALL_INFO API. This is a partial revert: on a few architectures syscall_set_arguments() implementations were buggy, so instead of adding them here and applying fixes on top, cleaner implementations are coming in follow-up commits. This reverts commit 7962c2eddbfe7cce879acb06f9b4f205789e57b7. Signed-off-by: Dmitry V. Levin --- arch/nios2/include/asm/syscall.h | 11 ++++++++ arch/openrisc/include/asm/syscall.h | 7 ++++++ arch/powerpc/include/asm/syscall.h | 10 ++++++++ arch/riscv/include/asm/syscall.h | 9 +++++++ arch/s390/include/asm/syscall.h | 12 +++++++++ arch/sh/include/asm/syscall_32.h | 12 +++++++++ arch/sparc/include/asm/syscall.h | 10 ++++++++ arch/um/include/asm/syscall-generic.h | 14 +++++++++++ arch/x86/include/asm/syscall.h | 36 +++++++++++++++++++++++++++ arch/xtensa/include/asm/syscall.h | 11 ++++++++ include/asm-generic/syscall.h | 16 ++++++++++++ 11 files changed, 148 insertions(+) diff --git a/arch/nios2/include/asm/syscall.h b/arch/nios2/include/asm/syscall.h index fff52205fb65..526449edd768 100644 --- a/arch/nios2/include/asm/syscall.h +++ b/arch/nios2/include/asm/syscall.h @@ -58,6 +58,17 @@ static inline void syscall_get_arguments(struct task_struct *task, *args = regs->r9; } +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, const unsigned long *args) +{ + regs->r4 = *args++; + regs->r5 = *args++; + regs->r6 = *args++; + regs->r7 = *args++; + regs->r8 = *args++; + regs->r9 = *args; +} + static inline int syscall_get_arch(struct task_struct *task) { return AUDIT_ARCH_NIOS2; diff --git a/arch/openrisc/include/asm/syscall.h b/arch/openrisc/include/asm/syscall.h index 903ed882bdec..e6383be2a195 100644 --- a/arch/openrisc/include/asm/syscall.h +++ b/arch/openrisc/include/asm/syscall.h @@ -57,6 +57,13 @@ syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, memcpy(args, ®s->gpr[3], 6 * sizeof(args[0])); } +static inline void +syscall_set_arguments(struct task_struct *task, struct pt_regs *regs, + const unsigned long *args) +{ + memcpy(®s->gpr[3], args, 6 * sizeof(args[0])); +} + static inline int syscall_get_arch(struct task_struct *task) { return AUDIT_ARCH_OPENRISC; diff --git a/arch/powerpc/include/asm/syscall.h b/arch/powerpc/include/asm/syscall.h index 3dd36c5e334a..b2715448a660 100644 --- a/arch/powerpc/include/asm/syscall.h +++ b/arch/powerpc/include/asm/syscall.h @@ -110,6 +110,16 @@ static inline void syscall_get_arguments(struct task_struct *task, } } +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, + const unsigned long *args) +{ + memcpy(®s->gpr[3], args, 6 * sizeof(args[0])); + + /* Also copy the first argument into orig_gpr3 */ + regs->orig_gpr3 = args[0]; +} + static inline int syscall_get_arch(struct task_struct *task) { if (is_tsk_32bit_task(task)) diff --git a/arch/riscv/include/asm/syscall.h b/arch/riscv/include/asm/syscall.h index 121fff429dce..8d389ba995c8 100644 --- a/arch/riscv/include/asm/syscall.h +++ b/arch/riscv/include/asm/syscall.h @@ -66,6 +66,15 @@ static inline void syscall_get_arguments(struct task_struct *task, memcpy(args, ®s->a1, 5 * sizeof(args[0])); } +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, + const unsigned long *args) +{ + regs->orig_a0 = args[0]; + args++; + memcpy(®s->a1, args, 5 * sizeof(regs->a1)); +} + static inline int syscall_get_arch(struct task_struct *task) { #ifdef CONFIG_64BIT diff --git a/arch/s390/include/asm/syscall.h b/arch/s390/include/asm/syscall.h index 27e3d804b311..b3dd883699e7 100644 --- a/arch/s390/include/asm/syscall.h +++ b/arch/s390/include/asm/syscall.h @@ -78,6 +78,18 @@ static inline void syscall_get_arguments(struct task_struct *task, args[0] = regs->orig_gpr2 & mask; } +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, + const unsigned long *args) +{ + unsigned int n = 6; + + while (n-- > 0) + if (n > 0) + regs->gprs[2 + n] = args[n]; + regs->orig_gpr2 = args[0]; +} + static inline int syscall_get_arch(struct task_struct *task) { #ifdef CONFIG_COMPAT diff --git a/arch/sh/include/asm/syscall_32.h b/arch/sh/include/asm/syscall_32.h index d87738eebe30..cb51a7528384 100644 --- a/arch/sh/include/asm/syscall_32.h +++ b/arch/sh/include/asm/syscall_32.h @@ -57,6 +57,18 @@ static inline void syscall_get_arguments(struct task_struct *task, args[0] = regs->regs[4]; } +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, + const unsigned long *args) +{ + regs->regs[1] = args[5]; + regs->regs[0] = args[4]; + regs->regs[7] = args[3]; + regs->regs[6] = args[2]; + regs->regs[5] = args[1]; + regs->regs[4] = args[0]; +} + static inline int syscall_get_arch(struct task_struct *task) { int arch = AUDIT_ARCH_SH; diff --git a/arch/sparc/include/asm/syscall.h b/arch/sparc/include/asm/syscall.h index 20c109ac8cc9..62a5a78804c4 100644 --- a/arch/sparc/include/asm/syscall.h +++ b/arch/sparc/include/asm/syscall.h @@ -117,6 +117,16 @@ static inline void syscall_get_arguments(struct task_struct *task, } } +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, + const unsigned long *args) +{ + unsigned int i; + + for (i = 0; i < 6; i++) + regs->u_regs[UREG_I0 + i] = args[i]; +} + static inline int syscall_get_arch(struct task_struct *task) { #if defined(CONFIG_SPARC64) && defined(CONFIG_COMPAT) diff --git a/arch/um/include/asm/syscall-generic.h b/arch/um/include/asm/syscall-generic.h index 172b74143c4b..2984feb9d576 100644 --- a/arch/um/include/asm/syscall-generic.h +++ b/arch/um/include/asm/syscall-generic.h @@ -62,6 +62,20 @@ static inline void syscall_get_arguments(struct task_struct *task, *args = UPT_SYSCALL_ARG6(r); } +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, + const unsigned long *args) +{ + struct uml_pt_regs *r = ®s->regs; + + UPT_SYSCALL_ARG1(r) = *args++; + UPT_SYSCALL_ARG2(r) = *args++; + UPT_SYSCALL_ARG3(r) = *args++; + UPT_SYSCALL_ARG4(r) = *args++; + UPT_SYSCALL_ARG5(r) = *args++; + UPT_SYSCALL_ARG6(r) = *args; +} + /* See arch/x86/um/asm/syscall.h for syscall_get_arch() definition. */ #endif /* __UM_SYSCALL_GENERIC_H */ diff --git a/arch/x86/include/asm/syscall.h b/arch/x86/include/asm/syscall.h index 7c488ff0c764..b9c249dd9e3d 100644 --- a/arch/x86/include/asm/syscall.h +++ b/arch/x86/include/asm/syscall.h @@ -90,6 +90,18 @@ static inline void syscall_get_arguments(struct task_struct *task, args[5] = regs->bp; } +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, + const unsigned long *args) +{ + regs->bx = args[0]; + regs->cx = args[1]; + regs->dx = args[2]; + regs->si = args[3]; + regs->di = args[4]; + regs->bp = args[5]; +} + static inline int syscall_get_arch(struct task_struct *task) { return AUDIT_ARCH_I386; @@ -121,6 +133,30 @@ static inline void syscall_get_arguments(struct task_struct *task, } } +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, + const unsigned long *args) +{ +# ifdef CONFIG_IA32_EMULATION + if (task->thread_info.status & TS_COMPAT) { + regs->bx = *args++; + regs->cx = *args++; + regs->dx = *args++; + regs->si = *args++; + regs->di = *args++; + regs->bp = *args; + } else +# endif + { + regs->di = *args++; + regs->si = *args++; + regs->dx = *args++; + regs->r10 = *args++; + regs->r8 = *args++; + regs->r9 = *args; + } +} + static inline int syscall_get_arch(struct task_struct *task) { /* x32 tasks should be considered AUDIT_ARCH_X86_64. */ diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h index 5ee974bf8330..f9a671cbf933 100644 --- a/arch/xtensa/include/asm/syscall.h +++ b/arch/xtensa/include/asm/syscall.h @@ -68,6 +68,17 @@ static inline void syscall_get_arguments(struct task_struct *task, args[i] = regs->areg[reg[i]]; } +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, + const unsigned long *args) +{ + static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS; + unsigned int i; + + for (i = 0; i < 6; ++i) + regs->areg[reg[i]] = args[i]; +} + asmlinkage long xtensa_rt_sigreturn(void); asmlinkage long xtensa_shmat(int, char __user *, int); asmlinkage long xtensa_fadvise64_64(int, int, diff --git a/include/asm-generic/syscall.h b/include/asm-generic/syscall.h index 5a80fe728dc8..0f7b9a493de7 100644 --- a/include/asm-generic/syscall.h +++ b/include/asm-generic/syscall.h @@ -117,6 +117,22 @@ void syscall_set_return_value(struct task_struct *task, struct pt_regs *regs, void syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, unsigned long *args); +/** + * syscall_set_arguments - change system call parameter value + * @task: task of interest, must be in system call entry tracing + * @regs: task_pt_regs() of @task + * @args: array of argument values to store + * + * Changes 6 arguments to the system call. + * The first argument gets value @args[0], and so on. + * + * It's only valid to call this when @task is stopped for tracing on + * entry to a system call, due to %SYSCALL_WORK_SYSCALL_TRACE or + * %SYSCALL_WORK_SYSCALL_AUDIT. + */ +void syscall_set_arguments(struct task_struct *task, struct pt_regs *regs, + const unsigned long *args); + /** * syscall_get_arch - return the AUDIT_ARCH for the current system call * @task: task of interest, must be blocked From patchwork Tue Jan 7 23:04:38 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Dmitry V. Levin" X-Patchwork-Id: 13929716 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0DAACE77197 for ; Tue, 7 Jan 2025 23:10:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:References: List-Owner; bh=uH3NQwkK7QuxJxkzyP5xhB3o/P8uJbuAQxJMf0KLzB8=; b=fXFJB3uLbH8CZo 2vqyC0UFw2DrJlfXwob1IjJyBTvQXq8+XGz/tH9aeQxeWEFkz4EjMGbgyCe536hqjTN6YZj9/yVMK /Ifh0jTfyXuonpkU/pU0+H3htc0RR+ggHe7u/MYncEKcDdG9zfxvZFEM5EycUIA68tYf7031uMyXY sZ3YJXwjA5S1erYnBOX7gkVl5sqZDWP+bpem02svbtQHSR1AKoe0Rp0ixvFcU2GhEFOEl/t49MD2/ LP4Nd+OeL3pspi3jiFiAuUfcQo4Ml6vILadheBe5802KEsVw+vM8YFJ2wiWobXT5VZ1ryNCZe0hbG Hcd+FgdTU42I7ykjvFzA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tVIi4-00000006V3v-1wM8; Tue, 07 Jan 2025 23:10:04 +0000 Received: from vmicros1.altlinux.org ([194.107.17.57]) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tVIcp-00000006Tyx-1h9E; Tue, 07 Jan 2025 23:04:40 +0000 Received: from mua.local.altlinux.org (mua.local.altlinux.org [192.168.1.14]) by vmicros1.altlinux.org (Postfix) with ESMTP id 9F09472C90D; Wed, 8 Jan 2025 02:04:38 +0300 (MSK) Received: by mua.local.altlinux.org (Postfix, from userid 508) id 734627CCB3A; Wed, 8 Jan 2025 01:04:38 +0200 (IST) Date: Wed, 8 Jan 2025 01:04:38 +0200 From: "Dmitry V. Levin" To: Oleg Nesterov Cc: Eugene Syromyatnikov , Mike Frysinger , Renzo Davoli , Davide Berardi , strace-devel@lists.strace.io, Vineet Gupta , Russell King , Catalin Marinas , Will Deacon , Brian Cain , Huacai Chen , WANG Xuerui , Geert Uytterhoeven , Michal Simek , Thomas Bogendoerfer , Dinh Nguyen , Jonas Bonn , Stefan Kristiansson , Stafford Horne , "James E.J. Bottomley" , Helge Deller , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Naveen N Rao , Madhavan Srinivasan , Paul Walmsley , Palmer Dabbelt , Albert Ou , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Yoshinori Sato , Rich Felker , John Paul Adrian Glaubitz , "David S. Miller" , Andreas Larsson , Richard Weinberger , Anton Ivanov , Johannes Berg , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Chris Zankel , Max Filippov , Arnd Bergmann , linux-snps-arc@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-arch@vger.kernel.org Subject: [PATCH 3/6] syscall.h: introduce syscall_set_nr() Message-ID: <20250107230438.GC30633@strace.io> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20250107230153.GA30560@strace.io> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250107_150439_937957_D9F052A1 X-CRM114-Status: GOOD ( 11.72 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Similar to syscall_set_arguments() that complements syscall_get_arguments(), introduce syscall_set_nr() that complements syscall_get_nr(). syscall_set_nr() is going to be needed along with syscall_set_arguments() on all HAVE_ARCH_TRACEHOOK architectures to implement PTRACE_SET_SYSCALL_INFO API. Signed-off-by: Dmitry V. Levin --- arch/arc/include/asm/syscall.h | 6 ++++++ arch/arm/include/asm/syscall.h | 12 ++++++++++++ arch/arm64/include/asm/syscall.h | 7 +++++++ arch/hexagon/include/asm/syscall.h | 7 +++++++ arch/loongarch/include/asm/syscall.h | 7 +++++++ arch/m68k/include/asm/syscall.h | 7 +++++++ arch/microblaze/include/asm/syscall.h | 7 +++++++ arch/mips/include/asm/syscall.h | 7 +++++++ arch/nios2/include/asm/syscall.h | 5 +++++ arch/openrisc/include/asm/syscall.h | 6 ++++++ arch/parisc/include/asm/syscall.h | 7 +++++++ arch/powerpc/include/asm/syscall.h | 5 +++++ arch/riscv/include/asm/syscall.h | 7 +++++++ arch/s390/include/asm/syscall.h | 7 +++++++ arch/sh/include/asm/syscall_32.h | 7 +++++++ arch/sparc/include/asm/syscall.h | 7 +++++++ arch/um/include/asm/syscall-generic.h | 5 +++++ arch/x86/include/asm/syscall.h | 7 +++++++ arch/xtensa/include/asm/syscall.h | 7 +++++++ include/asm-generic/syscall.h | 14 ++++++++++++++ 20 files changed, 144 insertions(+) diff --git a/arch/arc/include/asm/syscall.h b/arch/arc/include/asm/syscall.h index 89c1e1736356..6095fbfa74ab 100644 --- a/arch/arc/include/asm/syscall.h +++ b/arch/arc/include/asm/syscall.h @@ -23,6 +23,12 @@ syscall_get_nr(struct task_struct *task, struct pt_regs *regs) return -1; } +static inline void +syscall_set_nr(struct task_struct *task, struct pt_regs *regs, int nr) +{ + regs->r8 = nr; +} + static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/arm/include/asm/syscall.h b/arch/arm/include/asm/syscall.h index 21927fa0ae2b..cfa61f355675 100644 --- a/arch/arm/include/asm/syscall.h +++ b/arch/arm/include/asm/syscall.h @@ -31,6 +31,18 @@ static inline int syscall_get_nr(struct task_struct *task, return task_thread_info(task)->abi_syscall & __NR_SYSCALL_MASK; } +static inline void syscall_set_nr(struct task_struct *task, + struct pt_regs *regs, + int nr) +{ + if (!IS_ENABLED(CONFIG_AEABI) || IS_ENABLED(CONFIG_OABI_COMPAT)) { + if (nr != -1) + nr &= __NR_SYSCALL_MASK; + } + + task_thread_info(task)->abi_syscall = nr; +} + static inline bool __in_oabi_syscall(struct task_struct *task) { return IS_ENABLED(CONFIG_OABI_COMPAT) && diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/syscall.h index 76020b66286b..0e6807618bed 100644 --- a/arch/arm64/include/asm/syscall.h +++ b/arch/arm64/include/asm/syscall.h @@ -23,6 +23,13 @@ static inline int syscall_get_nr(struct task_struct *task, return regs->syscallno; } +static inline void syscall_set_nr(struct task_struct *task, + struct pt_regs *regs, + int nr) +{ + regs->syscallno = nr; +} + static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/hexagon/include/asm/syscall.h b/arch/hexagon/include/asm/syscall.h index 12d2df6aaa03..72befa719434 100644 --- a/arch/hexagon/include/asm/syscall.h +++ b/arch/hexagon/include/asm/syscall.h @@ -26,6 +26,13 @@ static inline long syscall_get_nr(struct task_struct *task, return regs->r06; } +static inline void syscall_set_nr(struct task_struct *task, + struct pt_regs *regs, + int nr) +{ + regs->r06 = nr; +} + static inline void syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, unsigned long *args) diff --git a/arch/loongarch/include/asm/syscall.h b/arch/loongarch/include/asm/syscall.h index ff415b3c0a8e..81d2733f7b94 100644 --- a/arch/loongarch/include/asm/syscall.h +++ b/arch/loongarch/include/asm/syscall.h @@ -26,6 +26,13 @@ static inline long syscall_get_nr(struct task_struct *task, return regs->regs[11]; } +static inline void syscall_set_nr(struct task_struct *task, + struct pt_regs *regs, + int nr) +{ + regs->regs[11] = nr; +} + static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/m68k/include/asm/syscall.h b/arch/m68k/include/asm/syscall.h index d1453e850cdd..bf84b160c2eb 100644 --- a/arch/m68k/include/asm/syscall.h +++ b/arch/m68k/include/asm/syscall.h @@ -14,6 +14,13 @@ static inline int syscall_get_nr(struct task_struct *task, return regs->orig_d0; } +static inline void syscall_set_nr(struct task_struct *task, + struct pt_regs *regs, + int nr) +{ + regs->orig_d0 = nr; +} + static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/microblaze/include/asm/syscall.h b/arch/microblaze/include/asm/syscall.h index 5eb3f624cc59..b5b6b91fae3e 100644 --- a/arch/microblaze/include/asm/syscall.h +++ b/arch/microblaze/include/asm/syscall.h @@ -14,6 +14,13 @@ static inline long syscall_get_nr(struct task_struct *task, return regs->r12; } +static inline void syscall_set_nr(struct task_struct *task, + struct pt_regs *regs, + int nr) +{ + regs->r12 = nr; +} + static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/mips/include/asm/syscall.h b/arch/mips/include/asm/syscall.h index b8a19e465bf4..793026c4c7f0 100644 --- a/arch/mips/include/asm/syscall.h +++ b/arch/mips/include/asm/syscall.h @@ -41,6 +41,13 @@ static inline long syscall_get_nr(struct task_struct *task, return task_thread_info(task)->syscall; } +static inline void syscall_set_nr(struct task_struct *task, + struct pt_regs *regs, + int nr) +{ + task_thread_info(task)->syscall = nr; +} + static inline void mips_syscall_update_nr(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/nios2/include/asm/syscall.h b/arch/nios2/include/asm/syscall.h index 526449edd768..8e3eb1d689bb 100644 --- a/arch/nios2/include/asm/syscall.h +++ b/arch/nios2/include/asm/syscall.h @@ -15,6 +15,11 @@ static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs) return regs->r2; } +static inline void syscall_set_nr(struct task_struct *task, struct pt_regs *regs, int nr) +{ + regs->r2 = nr; +} + static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/openrisc/include/asm/syscall.h b/arch/openrisc/include/asm/syscall.h index e6383be2a195..5e037d9659c5 100644 --- a/arch/openrisc/include/asm/syscall.h +++ b/arch/openrisc/include/asm/syscall.h @@ -25,6 +25,12 @@ syscall_get_nr(struct task_struct *task, struct pt_regs *regs) return regs->orig_gpr11; } +static inline void +syscall_set_nr(struct task_struct *task, struct pt_regs *regs, int nr) +{ + regs->orig_gpr11 = nr; +} + static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/parisc/include/asm/syscall.h b/arch/parisc/include/asm/syscall.h index b146d0ae4c77..c11222798ab2 100644 --- a/arch/parisc/include/asm/syscall.h +++ b/arch/parisc/include/asm/syscall.h @@ -17,6 +17,13 @@ static inline long syscall_get_nr(struct task_struct *tsk, return regs->gr[20]; } +static inline void syscall_set_nr(struct task_struct *tsk, + struct pt_regs *regs, + int nr) +{ + regs->gr[20] = nr; +} + static inline void syscall_get_arguments(struct task_struct *tsk, struct pt_regs *regs, unsigned long *args) diff --git a/arch/powerpc/include/asm/syscall.h b/arch/powerpc/include/asm/syscall.h index b2715448a660..09e34d19c961 100644 --- a/arch/powerpc/include/asm/syscall.h +++ b/arch/powerpc/include/asm/syscall.h @@ -39,6 +39,11 @@ static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs) return -1; } +static inline void syscall_set_nr(struct task_struct *task, struct pt_regs *regs, int nr) +{ + regs->gpr[0] = nr; +} + static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/riscv/include/asm/syscall.h b/arch/riscv/include/asm/syscall.h index 8d389ba995c8..a5281cdf2b10 100644 --- a/arch/riscv/include/asm/syscall.h +++ b/arch/riscv/include/asm/syscall.h @@ -30,6 +30,13 @@ static inline int syscall_get_nr(struct task_struct *task, return regs->a7; } +static inline void syscall_set_nr(struct task_struct *task, + struct pt_regs *regs, + int nr) +{ + regs->a7 = nr; +} + static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/s390/include/asm/syscall.h b/arch/s390/include/asm/syscall.h index b3dd883699e7..1c0e349fd5c9 100644 --- a/arch/s390/include/asm/syscall.h +++ b/arch/s390/include/asm/syscall.h @@ -24,6 +24,13 @@ static inline long syscall_get_nr(struct task_struct *task, (regs->int_code & 0xffff) : -1; } +static inline void syscall_set_nr(struct task_struct *task, + struct pt_regs *regs, + int nr) +{ + regs->int_code = (regs->int_code & ~0xffff) | (nr & 0xffff); +} + static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/sh/include/asm/syscall_32.h b/arch/sh/include/asm/syscall_32.h index cb51a7528384..0e1e7b029457 100644 --- a/arch/sh/include/asm/syscall_32.h +++ b/arch/sh/include/asm/syscall_32.h @@ -15,6 +15,13 @@ static inline long syscall_get_nr(struct task_struct *task, return (regs->tra >= 0) ? regs->regs[3] : -1L; } +static inline void syscall_set_nr(struct task_struct *task, + struct pt_regs *regs, + int nr) +{ + regs->regs[3] = nr; +} + static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/sparc/include/asm/syscall.h b/arch/sparc/include/asm/syscall.h index 62a5a78804c4..36830a37fda4 100644 --- a/arch/sparc/include/asm/syscall.h +++ b/arch/sparc/include/asm/syscall.h @@ -25,6 +25,13 @@ static inline long syscall_get_nr(struct task_struct *task, return (syscall_p ? regs->u_regs[UREG_G1] : -1L); } +static inline void syscall_set_nr(struct task_struct *task, + struct pt_regs *regs, + int nr) +{ + regs->u_regs[UREG_G1] = nr; +} + static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/um/include/asm/syscall-generic.h b/arch/um/include/asm/syscall-generic.h index 2984feb9d576..bcd73bcfe577 100644 --- a/arch/um/include/asm/syscall-generic.h +++ b/arch/um/include/asm/syscall-generic.h @@ -21,6 +21,11 @@ static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs) return PT_REGS_SYSCALL_NR(regs); } +static inline void syscall_set_nr(struct task_struct *task, struct pt_regs *regs, int nr) +{ + PT_REGS_SYSCALL_NR(regs) = nr; +} + static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/x86/include/asm/syscall.h b/arch/x86/include/asm/syscall.h index b9c249dd9e3d..c10dbb74cd00 100644 --- a/arch/x86/include/asm/syscall.h +++ b/arch/x86/include/asm/syscall.h @@ -38,6 +38,13 @@ static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs) return regs->orig_ax; } +static inline void syscall_set_nr(struct task_struct *task, + struct pt_regs *regs, + int nr) +{ + regs->orig_ax = nr; +} + static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h index f9a671cbf933..7db3b489c8ad 100644 --- a/arch/xtensa/include/asm/syscall.h +++ b/arch/xtensa/include/asm/syscall.h @@ -28,6 +28,13 @@ static inline long syscall_get_nr(struct task_struct *task, return regs->syscall; } +static inline void syscall_set_nr(struct task_struct *task, + struct pt_regs *regs, + int nr) +{ + regs->syscall = nr; +} + static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { diff --git a/include/asm-generic/syscall.h b/include/asm-generic/syscall.h index 0f7b9a493de7..e33fd4e783c1 100644 --- a/include/asm-generic/syscall.h +++ b/include/asm-generic/syscall.h @@ -37,6 +37,20 @@ struct pt_regs; */ int syscall_get_nr(struct task_struct *task, struct pt_regs *regs); +/** + * syscall_set_nr - change the system call a task is executing + * @task: task of interest, must be blocked + * @regs: task_pt_regs() of @task + * @nr: system call number + * + * Changes the system call number @task is about to execute. + * + * It's only valid to call this when @task is stopped for tracing on + * entry to a system call, due to %SYSCALL_WORK_SYSCALL_TRACE or + * %SYSCALL_WORK_SYSCALL_AUDIT. + */ +void syscall_set_nr(struct task_struct *task, struct pt_regs *regs, int nr); + /** * syscall_rollback - roll back registers after an aborted system call * @task: task of interest, must be in system call exit tracing