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-rw-r--r--arch/sh/include/asm/syscall_32.h69
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/sh/include/asm/syscall_32.h b/arch/sh/include/asm/syscall_32.h
new file mode 100644
index 000000000..d87738eeb
--- /dev/null
+++ b/arch/sh/include/asm/syscall_32.h
@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_SH_SYSCALL_32_H
+#define __ASM_SH_SYSCALL_32_H
+
+#include <uapi/linux/audit.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/err.h>
+#include <asm/ptrace.h>
+
+/* The system call number is given by the user in R3 */
+static inline long syscall_get_nr(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ return (regs->tra >= 0) ? regs->regs[3] : -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 r0 value anywhere.
+ */
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ return IS_ERR_VALUE(regs->regs[0]) ? regs->regs[0] : 0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ return regs->regs[0];
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+ struct pt_regs *regs,
+ int error, long val)
+{
+ regs->regs[0] = (long) error ?: val;
+}
+
+static inline void syscall_get_arguments(struct task_struct *task,
+ struct pt_regs *regs,
+ unsigned long *args)
+{
+
+ /* Argument pattern is: R4, R5, R6, R7, R0, R1 */
+ args[5] = regs->regs[1];
+ args[4] = regs->regs[0];
+ args[3] = regs->regs[7];
+ args[2] = regs->regs[6];
+ args[1] = regs->regs[5];
+ args[0] = regs->regs[4];
+}
+
+static inline int syscall_get_arch(struct task_struct *task)
+{
+ int arch = AUDIT_ARCH_SH;
+
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+ arch |= __AUDIT_ARCH_LE;
+#endif
+ return arch;
+}
+#endif /* __ASM_SH_SYSCALL_32_H */