get_regs: define for all architectures

* defs.h (get_regs_error): Remove.
(clear_regs): Update prototype, declare unconditionally.
(get_regs): Declare unconditionally.
* syscall.c (clear_regs): New function.
(get_regs): Define unconditionally.
(get_regs_error): Define unconditionally, change scope to static.

defs.h

@@ -457,25 +457,9 @@ extern int trace_syscall(struct tcb *);
 extern void count_syscall(struct tcb *, const struct timeval *);
 extern void call_summary(FILE *);
 
-#if defined(AVR32) \
- || defined(I386) \
- || defined(X86_64) || defined(X32) \
- || defined(AARCH64) \
- || defined(ARM) \
- || defined(SPARC) || defined(SPARC64) \
- || defined(TILE) \
- || defined(OR1K) \
- || defined(METAG) \
- || defined(ARC) \
- || defined(POWERPC)
-extern long get_regs_error;
-# define clear_regs()  (get_regs_error = -1)
+extern void clear_regs(void);
 extern void get_regs(pid_t pid);
-#else
-# define get_regs_error 0
-# define clear_regs()  ((void)0)
-# define get_regs(pid) ((void)0)
-#endif
+
 extern int umoven(struct tcb *, long, unsigned int, char *);
 #define umove(pid, addr, objp)	\
 	umoven((pid), (addr), sizeof(*(objp)), (char *) (objp))

syscall.c

@@ -791,6 +791,8 @@ static struct user_regs_struct arc_regs;
 # define ARCH_REGS_FOR_GETREGSET arc_regs
 #endif
 
+static long get_regs_error;
+
 void
 print_pc(struct tcb *tcp)
 {
@@ -1017,8 +1019,11 @@ static int powerpc_getregs_old(pid_t pid)
 }
 #endif
 
-#ifndef get_regs
-long get_regs_error;
+void
+clear_regs(void)
+{
+	get_regs_error = -1;
+}
 
 #if defined ARCH_REGS_FOR_GETREGSET
 static long
@@ -1116,7 +1121,6 @@ get_regs(pid_t pid)
 	get_regs_error = 0;
 #endif
 }
-#endif /* !get_regs */
 
 /* Returns:
  * 0: "ignore this ptrace stop", bail out of trace_syscall_entering() silently.