linux-kernel - [PATCH v2 03/13] c6x: define syscall_get

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Date:   Mon, 18 Mar 2019 02:28:53 +0300
From:   "Dmitry V. Levin" <ldv@...linux.org>
To:     Paul Moore <paul@...l-moore.com>
Cc:     Mark Salter <msalter@...hat.com>,
        Elvira Khabirova <lineprinter@...linux.org>,
        Eugene Syromyatnikov <esyr@...hat.com>,
        Aurelien Jacquiot <jacquiot.aurelien@...il.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Andy Lutomirski <luto@...nel.org>, linux-c6x-dev@...ux-c6x.org,
        linux-audit@...hat.com, linux-kernel@...r.kernel.org
Subject: [PATCH v2 03/13] c6x: define syscall_get_arch()

syscall_get_arch() is required to be implemented on all architectures
in addition to already implemented syscall_get_nr(),
syscall_get_arguments(), syscall_get_error(), and
syscall_get_return_value() functions in order to extend the generic
ptrace API with PTRACE_GET_SYSCALL_INFO request.

Acked-by: Mark Salter <msalter@...hat.com>
Acked-by: Paul Moore <paul@...l-moore.com>
Cc: Elvira Khabirova <lineprinter@...linux.org>
Cc: Eugene Syromyatnikov <esyr@...hat.com>
Cc: Aurelien Jacquiot <jacquiot.aurelien@...il.com>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: linux-c6x-dev@...ux-c6x.org
Cc: linux-audit@...hat.com
Signed-off-by: Dmitry V. Levin <ldv@...linux.org>
---

Notes:
    v2: unchanged

 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 1626727bb921..35ccf269ca3d 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_CSKY		(EM_CSKY|__AUDIT_ARCH_LE)
 #define AUDIT_ARCH_FRV		(EM_FRV)
-- 
ldv