import PULS_20160108

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm64 / include / asm / syscall.h

diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/syscall.h
index 89c047f9a9717efe1d3a83db3988c1c621aa2882..709a574468f01a7fab6f20683310aee5f1689e3c 100644 (file)
--- a/arch/arm64/include/asm/syscall.h
+++ b/arch/arm64/include/asm/syscall.h
@@ -16,8 +16,11 @@
 #ifndef __ASM_SYSCALL_H
 #define __ASM_SYSCALL_H
 
+#include <uapi/linux/audit.h>
+#include <linux/compat.h>
 #include <linux/err.h>
 
+extern const void *sys_call_table[];
 
 static inline int syscall_get_nr(struct task_struct *task,
                                 struct pt_regs *regs)
@@ -59,6 +62,9 @@ static inline void syscall_get_arguments(struct task_struct *task,
                                         unsigned int i, unsigned int n,
                                         unsigned long *args)
 {
+       if (n == 0)
+               return;
+
        if (i + n > SYSCALL_MAX_ARGS) {
                unsigned long *args_bad = args + SYSCALL_MAX_ARGS - i;
                unsigned int n_bad = n + i - SYSCALL_MAX_ARGS;
@@ -82,6 +88,9 @@ static inline void syscall_set_arguments(struct task_struct *task,
                                         unsigned int i, unsigned int n,
                                         const unsigned long *args)
 {
+       if (n == 0)
+               return;
+
        if (i + n > SYSCALL_MAX_ARGS) {
                pr_warning("%s called with max args %d, handling only %d\n",
                           __func__, i + n, SYSCALL_MAX_ARGS);
@@ -98,4 +107,16 @@ 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(void)
+{
+       if (is_compat_task())
+               return AUDIT_ARCH_ARM;
+
+       return AUDIT_ARCH_AARCH64;
+}
+
 #endif /* __ASM_SYSCALL_H */