1 files changed, 95 insertions, 14 deletions
diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h
index 3673ff1f1bc5..a168bf81c7f4 100644
--- a/arch/xtensa/include/asm/syscall.h
+++ b/arch/xtensa/include/asm/syscall.h
@@ -1,27 +1,108 @@
 /*
- * include/asm-xtensa/syscall.h
- *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
  * Copyright (C) 2001 - 2007 Tensilica Inc.
+ * Copyright (C) 2018 Cadence Design Systems Inc.
  */
 
-struct pt_regs;
-asmlinkage long xtensa_ptrace(long, long, long, long);
-asmlinkage long xtensa_sigreturn(struct pt_regs*);
+#ifndef _ASM_SYSCALL_H
+#define _ASM_SYSCALL_H
+
+#include <linux/err.h>
+#include <asm/ptrace.h>
+#include <uapi/linux/audit.h>
+
+static inline int syscall_get_arch(void)
+{
+	return AUDIT_ARCH_XTENSA;
+}
+
+typedef void (*syscall_t)(void);
+extern syscall_t sys_call_table[];
+
+static inline long syscall_get_nr(struct task_struct *task,
+				  struct pt_regs *regs)
+{
+	return regs->syscall;
+}
+
+static inline void syscall_rollback(struct task_struct *task,
+				    struct pt_regs *regs)
+{
+	/* Do nothing. */
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+				     struct pt_regs *regs)
+{
+	/* 0 if syscall succeeded, otherwise -Errorcode */
+	return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+					    struct pt_regs *regs)
+{
+	return regs->areg[2];
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+					    struct pt_regs *regs,
+					    int error, long val)
+{
+	regs->areg[0] = (long) error ? error : val;
+}
+
+#define SYSCALL_MAX_ARGS 6
+#define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9}
+
+static inline void syscall_get_arguments(struct task_struct *task,
+					 struct pt_regs *regs,
+					 unsigned int i, unsigned int n,
+					 unsigned long *args)
+{
+	static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
+	unsigned int j;
+
+	if (n == 0)
+		return;
+
+	WARN_ON_ONCE(i + n > SYSCALL_MAX_ARGS);
+
+	for (j = 0; j < n; ++j) {
+		if (i + j < SYSCALL_MAX_ARGS)
+			args[j] = regs->areg[reg[i + j]];
+		else
+			args[j] = 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)
+{
+	static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
+	unsigned int j;
+
+	if (n == 0)
+		return;
+
+	if (WARN_ON_ONCE(i + n > SYSCALL_MAX_ARGS)) {
+		if (i < SYSCALL_MAX_ARGS)
+			n = SYSCALL_MAX_ARGS - i;
+		else
+			return;
+	}
+
+	for (j = 0; j < n; ++j)
+		regs->areg[reg[i + j]] = args[j];
+}
+
 asmlinkage long xtensa_rt_sigreturn(struct pt_regs*);
 asmlinkage long xtensa_shmat(int, char __user *, int);
 asmlinkage long xtensa_fadvise64_64(int, int,
 				    unsigned long long, unsigned long long);
 
-/* Should probably move to linux/syscalls.h */
-struct pollfd;
-asmlinkage long sys_pselect6(int n, fd_set __user *inp, fd_set __user *outp,
-			     fd_set __user *exp, struct timespec __user *tsp,
-			     void __user *sig);
-asmlinkage long sys_ppoll(struct pollfd __user *ufds, unsigned int nfds,
-			  struct timespec __user *tsp,
-			  const sigset_t __user *sigmask,
-			  size_t sigsetsize);
+#endif