1 files changed, 47 insertions, 0 deletions

diff --git a/arch/nios2/include/asm/ptrace.h b/arch/nios2/include/asm/ptrace.h
index 20fb1cf2dab6..642462144872 100644
--- a/arch/nios2/include/asm/ptrace.h
+++ b/arch/nios2/include/asm/ptrace.h
@@ -15,7 +15,54 @@
 
 #include <uapi/asm/ptrace.h>
 
+/* This struct defines the way the registers are stored on the
+   stack during a system call.  */
+
 #ifndef __ASSEMBLY__
+struct pt_regs {
+        unsigned long  r8;      /* r8-r15 Caller-saved GP registers */
+        unsigned long  r9;
+        unsigned long  r10;
+        unsigned long  r11;
+        unsigned long  r12;
+        unsigned long  r13;
+        unsigned long  r14;
+        unsigned long  r15;
+        unsigned long  r1;      /* Assembler temporary */
+        unsigned long  r2;      /* Retval LS 32bits */
+        unsigned long  r3;      /* Retval MS 32bits */
+        unsigned long  r4;      /* r4-r7 Register arguments */
+        unsigned long  r5;
+        unsigned long  r6;
+        unsigned long  r7;
+        unsigned long  orig_r2; /* Copy of r2 ?? */
+        unsigned long  ra;      /* Return address */
+        unsigned long  fp;      /* Frame pointer */
+        unsigned long  sp;      /* Stack pointer */
+        unsigned long  gp;      /* Global pointer */
+        unsigned long  estatus;
+        unsigned long  ea;      /* Exception return address (pc) */
+        unsigned long  orig_r7;
+};
+
+/*
+ * This is the extended stack used by signal handlers and the context
+ * switcher: it's pushed after the normal "struct pt_regs".
+ */
+struct switch_stack {
+        unsigned long  r16;     /* r16-r23 Callee-saved GP registers */
+        unsigned long  r17;
+        unsigned long  r18;
+        unsigned long  r19;
+        unsigned long  r20;
+        unsigned long  r21;
+        unsigned long  r22;
+        unsigned long  r23;
+        unsigned long  fp;
+        unsigned long  gp;
+        unsigned long  ra;
+};
+
 #define user_mode(regs) (((regs)->estatus & ESTATUS_EU))
 
 #define instruction_pointer(regs)       ((regs)->ra)