[IA64] utrace syscall.h support for ia64
Add asm/syscall.h for IA64. Utrace requires this.
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/include/asm/syscall.h b/arch/ia64/include/asm/syscall.h
new file mode 100644
index 0000000..3fd4fa6
--- /dev/null
+++ b/arch/ia64/include/asm/syscall.h
@@ -0,0 +1,92 @@
+/*
+ * Access to user system call parameters and results
+ *
+ * Copyright (C) 2008 Intel Corp. Shaohua Li <shaohua.li@intel.com>
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License v.2.
+ *
+ * See asm-generic/syscall.h for descriptions of what we must do here.
+ */
+
+#ifndef _ASM_SYSCALL_H
+#define _ASM_SYSCALL_H 1
+
+#include <linux/sched.h>
+#include <linux/err.h>
+
+static inline long syscall_get_nr(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ BUG_ON(IS_IA32_PROCESS(regs));
+
+ if ((long)regs->cr_ifs < 0) /* Not a syscall */
+ return -1;
+ return regs->r15;
+}
+
+static inline void syscall_rollback(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ BUG_ON(IS_IA32_PROCESS(regs));
+ /* do nothing */
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ BUG_ON(IS_IA32_PROCESS(regs));
+
+ return regs->r10 == -1 ? regs->r8:0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ BUG_ON(IS_IA32_PROCESS(regs));
+
+ return regs->r8;
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+ struct pt_regs *regs,
+ int error, long val)
+{
+ BUG_ON(IS_IA32_PROCESS(regs));
+
+ if (error) {
+ /* error < 0, but ia64 uses > 0 return value */
+ regs->r8 = -error;
+ regs->r10 = -1;
+ } else {
+ regs->r8 = val;
+ regs->r10 = 0;
+ }
+}
+
+extern void ia64_syscall_get_set_arguments(struct task_struct *task,
+ struct pt_regs *regs, unsigned int i, unsigned int n,
+ unsigned long *args, int rw);
+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(IS_IA32_PROCESS(regs));
+ BUG_ON(i + n > 6);
+
+ ia64_syscall_get_set_arguments(task, regs, i, n, args, 0);
+}
+
+static inline void syscall_set_arguments(struct task_struct *task,
+ struct pt_regs *regs,
+ unsigned int i, unsigned int n,
+ unsigned long *args)
+{
+ BUG_ON(IS_IA32_PROCESS(regs));
+ BUG_ON(i + n > 6);
+
+ ia64_syscall_get_set_arguments(task, regs, i, n, args, 1);
+}
+#endif /* _ASM_SYSCALL_H */