Signed-off-by: Vineet Gupta
Cc: Arnd Bergmann
---
arch/arc/include/asm/ptrace.h |5 ++
arch/arc/include/asm/syscall.h | 72 +++
arch/arc/include/asm/syscalls.h | 30 ++
arch/arc/include/asm/unistd.h | 29 ++
arch/arc/kernel/entry.S | 49
arch/arc/kernel/process.c | 119 +++
arch/arc/kernel/sys.c | 19 ++
7 files changed, 323 insertions(+), 0 deletions(-)
create mode 100644 arch/arc/include/asm/syscall.h
create mode 100644 arch/arc/include/asm/syscalls.h
create mode 100644 arch/arc/include/asm/unistd.h
create mode 100644 arch/arc/kernel/process.c
create mode 100644 arch/arc/kernel/sys.c
diff --git a/arch/arc/include/asm/ptrace.h b/arch/arc/include/asm/ptrace.h
index 561c7eb..9abbb7c 100644
--- a/arch/arc/include/asm/ptrace.h
+++ b/arch/arc/include/asm/ptrace.h
@@ -125,6 +125,11 @@ struct user_regs_struct {
sp = -1;\
sp; \
})
+
+/* return 1 if in syscall, 0 if Intr or Exception */
+#define in_syscall(regs) (((regs->orig_r8) >= 0 && \
+ (regs->orig_r8 <= NR_syscalls)) ? 1 : 0)
+
#endif /* !__ASSEMBLY__ */
#endif /* __KERNEL__ */
diff --git a/arch/arc/include/asm/syscall.h b/arch/arc/include/asm/syscall.h
new file mode 100644
index 000..33ab304
--- /dev/null
+++ b/arch/arc/include/asm/syscall.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _ASM_ARC_SYSCALL_H
+#define _ASM_ARC_SYSCALL_H 1
+
+#include
+#include
+#include
+#include /* in_syscall() */
+
+static inline long
+syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
+{
+ if (user_mode(regs) && in_syscall(regs))
+ return regs->orig_r8;
+ else
+ return -1;
+}
+
+static inline void
+syscall_rollback(struct task_struct *task, struct pt_regs *regs)
+{
+ /* XXX: I can't fathom how pt_regs->r8 will be clobbered ? */
+ regs->r8 = regs->orig_r8;
+}
+
+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->r0) ? regs->r0 : 0;
+}
+
+static inline long
+syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
+{
+ return regs->r0;
+}
+
+static inline void
+syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
+int error, long val)
+{
+ regs->r0 = (long) error ?: val;
+}
+
+/*
+ * @i: argument index [0,5]
+ * @n: number of arguments; n+i must be [1,6].
+ */
+static inline void
+syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
+ unsigned int i, unsigned int n, unsigned long *args)
+{
+ unsigned long *inside_ptregs = &(regs->r0);
+ inside_ptregs -= i;
+
+ BUG_ON((i + n) > 6);
+
+ while (n--) {
+ args[i++] = (*inside_ptregs);
+ inside_ptregs--;
+ }
+}
+
+#endif
diff --git a/arch/arc/include/asm/syscalls.h b/arch/arc/include/asm/syscalls.h
new file mode 100644
index 000..cf5d2f5
--- /dev/null
+++ b/arch/arc/include/asm/syscalls.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _ASM_ARC_SYSCALLS_H
+#define _ASM_ARC_SYSCALLS_H 1
+
+#ifdef __KERNEL__
+
+#include
+#include
+#include
+
+int sys_execve_wrapper(int, int, int);
+int sys_clone_wrapper(int, int, int, int, int);
+int sys_fork_wrapper(void);
+int sys_vfork_wrapper(void);
+int sys_cacheflush(uint32_t, uint32_t uint32_t);
+int sys_arc_settls(void *);
+int sys_arc_gettls(void);
+
+#include
+
+#endif /* __KERNEL__ */
+
+#endif
diff --git a/arch/arc/include/asm/unistd.h b/arch/arc/include/asm/unistd.h
new file mode 100644
index 000..6a2d101
--- /dev/null
+++ b/arch/arc/include/asm/unistd.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/ no-legacy-syscalls-ABI ***/
+
+#define sys_mmap2 sys_mmap_pgoff
+
+#include
+
+#define NR_syscalls__NR_syscalls
+
+/* ARC specific syscall */
+#define __NR_cacheflush(__NR_arch_specific_syscall + 0)
+#define __NR_arc_settls(__NR_arch_specific_syscall +
