linux-kernel - [PATCH 12/13] riscv: define syscall_get

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Date:   Fri, 9 Nov 2018 06:17:13 +0300
From:   "Dmitry V. Levin" <ldv@...linux.org>
To:     Andy Lutomirski <luto@...nel.org>,
        Palmer Dabbelt <palmer@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Paul Moore <paul@...l-moore.com>,
        Eric Paris <eparis@...hat.com>
Cc:     Elvira Khabirova <lineprinter@...linux.org>,
        linux-riscv@...ts.infradead.org, linux-audit@...hat.com,
        linux-kernel@...r.kernel.org
Subject: [PATCH 12/13] riscv: define syscall_get_arch()

syscall_get_arch() is required to be implemented on all architectures
that use tracehook_report_syscall_entry() in order to extend
the generic ptrace API with PTRACE_GET_SYSCALL_INFO request.

Signed-off-by: Dmitry V. Levin <ldv@...linux.org>
---
 arch/riscv/include/asm/syscall.h | 6 ++++++
 include/uapi/linux/audit.h       | 1 +
 2 files changed, 7 insertions(+)

diff --git a/arch/riscv/include/asm/syscall.h b/arch/riscv/include/asm/syscall.h
index 8d25f8904c00..7e1e26ca7317 100644
--- a/arch/riscv/include/asm/syscall.h
+++ b/arch/riscv/include/asm/syscall.h
@@ -18,6 +18,7 @@
 #ifndef _ASM_RISCV_SYSCALL_H
 #define _ASM_RISCV_SYSCALL_H
 
+#include <uapi/linux/audit.h>
 #include <linux/sched.h>
 #include <linux/err.h>
 
@@ -99,4 +100,9 @@ static inline void syscall_set_arguments(struct task_struct *task,
 	memcpy(&regs->a1 + i * sizeof(regs->a1), args, n * sizeof(regs->a0));
 }
 
+static inline int syscall_get_arch(void)
+{
+	return AUDIT_ARCH_RISCV;
+}
+
 #endif	/* _ASM_RISCV_SYSCALL_H */
diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
index c4c8b131af48..ad4105c602a1 100644
--- a/include/uapi/linux/audit.h
+++ b/include/uapi/linux/audit.h
@@ -405,6 +405,7 @@ enum {
 /* do not define AUDIT_ARCH_PPCLE since it is not supported by audit */
 #define AUDIT_ARCH_PPC64	(EM_PPC64|__AUDIT_ARCH_64BIT)
 #define AUDIT_ARCH_PPC64LE	(EM_PPC64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
+#define AUDIT_ARCH_RISCV	(EM_RISCV|__AUDIT_ARCH_64BIT)
 #define AUDIT_ARCH_S390		(EM_S390)
 #define AUDIT_ARCH_S390X	(EM_S390|__AUDIT_ARCH_64BIT)
 #define AUDIT_ARCH_SH		(EM_SH)
-- 
ldv