summaryrefslogtreecommitdiffstats
path: root/kernel/arch/sh/include/asm/syscall_64.h
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/arch/sh/include/asm/syscall_64.h')
-rw-r--r--kernel/arch/sh/include/asm/syscall_64.h78
1 files changed, 78 insertions, 0 deletions
diff --git a/kernel/arch/sh/include/asm/syscall_64.h b/kernel/arch/sh/include/asm/syscall_64.h
new file mode 100644
index 000000000..c6a797b90
--- /dev/null
+++ b/kernel/arch/sh/include/asm/syscall_64.h
@@ -0,0 +1,78 @@
+#ifndef __ASM_SH_SYSCALL_64_H
+#define __ASM_SH_SYSCALL_64_H
+
+#include <uapi/linux/audit.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <asm/ptrace.h>
+
+/* The system call number is given by the user in R9 */
+static inline long syscall_get_nr(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ return (regs->syscall_nr >= 0) ? regs->regs[9] : -1L;
+}
+
+static inline void syscall_rollback(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ /*
+ * XXX: This needs some thought. On SH we don't
+ * save away the original R9 value anywhere.
+ */
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ return IS_ERR_VALUE(regs->regs[9]) ? regs->regs[9] : 0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ return regs->regs[9];
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+ struct pt_regs *regs,
+ int error, long val)
+{
+ if (error)
+ regs->regs[9] = -error;
+ else
+ regs->regs[9] = val;
+}
+
+static inline void syscall_get_arguments(struct task_struct *task,
+ struct pt_regs *regs,
+ unsigned int i, unsigned int n,
+ unsigned long *args)
+{
+ BUG_ON(i + n > 6);
+ memcpy(args, &regs->regs[2 + i], n * sizeof(args[0]));
+}
+
+static inline void syscall_set_arguments(struct task_struct *task,
+ struct pt_regs *regs,
+ unsigned int i, unsigned int n,
+ const unsigned long *args)
+{
+ BUG_ON(i + n > 6);
+ memcpy(&regs->regs[2 + i], args, n * sizeof(args[0]));
+}
+
+static inline int syscall_get_arch(void)
+{
+ int arch = AUDIT_ARCH_SH;
+
+#ifdef CONFIG_64BIT
+ arch |= __AUDIT_ARCH_64BIT;
+#endif
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+ arch |= __AUDIT_ARCH_LE;
+#endif
+
+ return arch;
+}
+#endif /* __ASM_SH_SYSCALL_64_H */