[PATCH_v8 1/2] arm64: Add audit support

On AArch64, audit is supported through generic lib/audit.c and compat_audit.c, and so this patch adds arch specific definitions required. Acked-by Will Deacon <will.deacon(a)arm.com&gt; Acked-by: Richard Guy Briggs <rgb(a)redhat.com&gt; Signed-off-by: AKASHI Takahiro <takahiro.akashi(a)linaro.org&gt; --- arch/arm64/Kconfig | 2 ++ arch/arm64/include/asm/syscall.h | 15 +++++++++++++++ include/uapi/linux/audit.h | 1 + 3 files changed, 18 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index b1dcdb4..7c1f8c7 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -9,6 +9,7 @@ config ARM64 select ARM_AMBA select ARM_ARCH_TIMER select ARM_GIC + select AUDIT_ARCH_COMPAT_GENERIC select BUILDTIME_EXTABLE_SORT select CLONE_BACKWARDS select COMMON_CLK @@ -25,6 +26,7 @@ config ARM64 select GENERIC_STRNLEN_USER select GENERIC_TIME_VSYSCALL select HARDIRQS_SW_RESEND + select HAVE_ARCH_AUDITSYSCALL select HAVE_ARCH_JUMP_LABEL select HAVE_ARCH_TRACEHOOK select HAVE_C_RECORDMCOUNT diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/syscall.h index 383771e..ce3882f 100644 --- a/arch/arm64/include/asm/syscall.h +++ b/arch/arm64/include/asm/syscall.h @@ -16,7 +16,9 @@ #ifndef __ASM_SYSCALL_H #define __ASM_SYSCALL_H +#include <uapi/linux/audit.h> #include <linux/err.h> +#include <asm/compat.h> extern const void *sys_call_table[]; @@ -105,4 +107,17 @@ static inline void syscall_set_arguments(struct task_struct *task, memcpy(&regs->regs[i], args, n * sizeof(args[0])); } +/* + * We don't care about endianness (__AUDIT_ARCH_LE bit) here because + * AArch64 has the same system calls both on little- and big- endian. + */ +static inline int syscall_get_arch(struct task_struct *task, + struct pt_regs *regs) +{ + if (is_compat_thread(task_thread_info(task))) + return AUDIT_ARCH_ARM; + + return AUDIT_ARCH_AARCH64; +} + #endif /* __ASM_SYSCALL_H */ diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h index 624df43..aa86fab 100644 --- a/include/uapi/linux/audit.h +++ b/include/uapi/linux/audit.h @@ -333,6 +333,7 @@ enum { /* distinguish syscall tables */ #define __AUDIT_ARCH_64BIT 0x80000000 #define __AUDIT_ARCH_LE 0x40000000 +#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_ARM (EM_ARM|__AUDIT_ARCH_LE) #define AUDIT_ARCH_ARMEB (EM_ARM) -- 1.8.3.2