From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Dmitry V. Levin" Subject: [PATCH v7 03/22] alpha: define remaining syscall_get_* functions Date: Mon, 7 Jan 2019 05:52:57 +0300 Message-ID: <20190107025257.GC1207@altlinux.org> References: <20190107025101.GA1182@altlinux.org> Mime-Version: 1.0 Return-path: Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Richard Henderson , Ivan Kokshaysky , Matt Turner Cc: Elvira Khabirova , Eugene Syromyatnikov , Oleg Nesterov , Andy Lutomirski , linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org syscall_get_* functions are required to be implemented on all architectures in order to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request. This adds remaining 4 syscall_get_* functions as documented in asm-generic/syscall.h: syscall_get_nr, syscall_get_arguments, syscall_get_error, and syscall_get_return_value. Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Matt Turner Cc: Oleg Nesterov Cc: Andy Lutomirski Cc: Elvira Khabirova Cc: Eugene Syromyatnikov Cc: linux-alpha@vger.kernel.org Signed-off-by: Dmitry V. Levin --- Notes: v7: unchanged v6: use asm-generic/syscall.h v5: initial revision arch/alpha/include/asm/syscall.h | 31 ++++++++++++++++++++++++++++++- 1 file changed, 30 insertions(+), 1 deletion(-) diff --git a/arch/alpha/include/asm/syscall.h b/arch/alpha/include/asm/syscall.h index d73a6fcb519c..c67d6a69d7c8 100644 --- a/arch/alpha/include/asm/syscall.h +++ b/arch/alpha/include/asm/syscall.h @@ -2,9 +2,38 @@ #ifndef _ASM_ALPHA_SYSCALL_H #define _ASM_ALPHA_SYSCALL_H +#include +#include #include -static inline int syscall_get_arch(void) +static inline int +syscall_get_nr(struct task_struct *task, struct pt_regs *regs) +{ + return regs->r0; +} + +static inline void +__syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, + unsigned int i, unsigned int n, unsigned long *args) +{ + BUILD_BUG_ON(sizeof(regs->r16) != sizeof(args[0])); + memcpy(args, ®s->r16 + i, n * sizeof(args[0])); +} + +static inline long +syscall_get_error(struct task_struct *task, struct pt_regs *regs) +{ + return regs->r19 ? -regs->r0 : 0; +} + +static inline long +syscall_get_return_value(struct task_struct *task, struct pt_regs *regs) +{ + return regs->r0; +} + +static inline int +syscall_get_arch(void) { return AUDIT_ARCH_ALPHA; } -- ldv