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Date:   Sat, 10 Nov 2018 05:01:21 +0300
From:   "Dmitry V. Levin" <ldv@altlinux.org>
To:     Andy Lutomirski <luto@kernel.org>,
        Mark Salter <msalter@redhat.com>,
        Aurelien Jacquiot <jacquiot.aurelien@gmail.com>,
        Paul Moore <paul@paul-moore.com>,
        Eric Paris <eparis@redhat.com>
Cc:     Elvira Khabirova <lineprinter@altlinux.org>,
        linux-c6x-dev@linux-c6x.org, linux-audit@redhat.com,
        linux-kernel@vger.kernel.org
Subject: [PATCH 07/13 v2] c6x: define syscall_get_arch()
Message-ID: <20181110020121.GA4908@altlinux.org>
Mail-Followup-To: Andy Lutomirski <luto@kernel.org>,
        Mark Salter <msalter@redhat.com>,
        Aurelien Jacquiot <jacquiot.aurelien@gmail.com>,
        Paul Moore <paul@paul-moore.com>, Eric Paris <eparis@redhat.com>,
        Elvira Khabirova <lineprinter@altlinux.org>,
        linux-c6x-dev@linux-c6x.org, linux-audit@redhat.com,
        linux-kernel@vger.kernel.org
References: <20181109031303.GA20906@altlinux.org>
 <20181109031613.GG21511@altlinux.org>
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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@altlinux.org>
---
v2: apparently, this architecture can be configured as big-endian,
    so changed AUDIT_ARCH_C6X to be little-endian, and added AUDIT_ARCH_C6XBE.

 arch/c6x/include/asm/syscall.h | 7 +++++++
 include/uapi/linux/audit.h     | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/arch/c6x/include/asm/syscall.h b/arch/c6x/include/asm/syscall.h
index ae2be315ee9c..39dbd1ef994c 100644
--- a/arch/c6x/include/asm/syscall.h
+++ b/arch/c6x/include/asm/syscall.h
@@ -11,6 +11,7 @@
 #ifndef __ASM_C6X_SYSCALL_H
 #define __ASM_C6X_SYSCALL_H
 
+#include <uapi/linux/audit.h>
 #include <linux/err.h>
 #include <linux/sched.h>
 
@@ -120,4 +121,10 @@ static inline void syscall_set_arguments(struct task_struct *task,
 	}
 }
 
+static inline int syscall_get_arch(void)
+{
+	return IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)
+		? AUDIT_ARCH_C6XBE : AUDIT_ARCH_C6X;
+}
+
 #endif /* __ASM_C6X_SYSCALLS_H */
diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
index bedf3bf54c3a..72aeea0a740d 100644
--- a/include/uapi/linux/audit.h
+++ b/include/uapi/linux/audit.h
@@ -381,6 +381,8 @@ enum {
 #define AUDIT_ARCH_ARCV2BE	(EM_ARCV2)
 #define AUDIT_ARCH_ARM		(EM_ARM|__AUDIT_ARCH_LE)
 #define AUDIT_ARCH_ARMEB	(EM_ARM)
+#define AUDIT_ARCH_C6X		(EM_TI_C6000|__AUDIT_ARCH_LE)
+#define AUDIT_ARCH_C6XBE	(EM_TI_C6000)
 #define AUDIT_ARCH_CRIS		(EM_CRIS|__AUDIT_ARCH_LE)
 #define AUDIT_ARCH_FRV		(EM_FRV)
 #define AUDIT_ARCH_I386		(EM_386|__AUDIT_ARCH_LE)
-- 
ldv