arc: 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: Vineet Gupta <[email protected]> Acked-by: Paul Moore <[email protected]> Cc: Elvira Khabirova <[email protected]> Cc: Eugene Syromyatnikov <[email protected]> Cc: Alexey Brodkin <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Dmitry V. Levin <[email protected]> Signed-off-by: Paul Moore <[email protected]>
jb55 · Mar 21, 2019 · 67f2a8a · 67f2a8a
1 parent 162f33d
commit 67f2a8a
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diff --git a/arch/arc/include/asm/syscall.h b/arch/arc/include/asm/syscall.h
@@ -9,6 +9,7 @@
 #ifndef _ASM_ARC_SYSCALL_H
 #define _ASM_ARC_SYSCALL_H  1
 
+#include <uapi/linux/audit.h>
 #include <linux/err.h>
 #include <linux/sched.h>
 #include <asm/unistd.h>
@@ -68,4 +69,14 @@ syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
 	}
 }
 
+static inline int
+syscall_get_arch(void)
+{
+	return IS_ENABLED(CONFIG_ISA_ARCOMPACT)
+		? (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)
+			? AUDIT_ARCH_ARCOMPACTBE : AUDIT_ARCH_ARCOMPACT)
+		: (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)
+			? AUDIT_ARCH_ARCV2BE : AUDIT_ARCH_ARCV2);
+}
+
 #endif
diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
@@ -375,6 +375,10 @@ enum {
 
 #define AUDIT_ARCH_AARCH64	(EM_AARCH64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
 #define AUDIT_ARCH_ALPHA	(EM_ALPHA|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
+#define AUDIT_ARCH_ARCOMPACT	(EM_ARCOMPACT|__AUDIT_ARCH_LE)
+#define AUDIT_ARCH_ARCOMPACTBE	(EM_ARCOMPACT)
+#define AUDIT_ARCH_ARCV2	(EM_ARCV2|__AUDIT_ARCH_LE)
+#define AUDIT_ARCH_ARCV2BE	(EM_ARCV2)
 #define AUDIT_ARCH_ARM		(EM_ARM|__AUDIT_ARCH_LE)
 #define AUDIT_ARCH_ARMEB	(EM_ARM)
 #define AUDIT_ARCH_CRIS		(EM_CRIS|__AUDIT_ARCH_LE)