move arch-specific checks out of shared dl-syscall.h and into arch-specific dl-syscalls.h

ldso/include/dl-syscall.h

@@ -104,8 +104,7 @@ static inline _syscall0(gid_t, _dl_getpid);
 static inline _syscall3(int, _dl_readlink, const char *, path, char *, buf, size_t, bufsiz);
 
 #ifdef __NR_mmap
-#if defined(__powerpc__) || defined(__mips__) || defined(__sh__) || defined(__sparc__) || defined(__x86_64__)
+#ifdef MMAP_HAS_6_ARGS
-/* PowerPC, MIPS and SuperH have a different calling convention for mmap(). */
 #define __NR__dl_mmap __NR_mmap
 static inline _syscall6(void *, _dl_mmap, void *, start, size_t, length,
 		int, prot, int, flags, int, fd, off_t, offset);
@@ -141,6 +140,8 @@ static inline void * _dl_mmap(void * addr, unsigned long size, int prot,
     return(__syscall_mmap2(addr, size, prot, flags,
 		fd, (off_t) (offset >> MMAP2_PAGE_SHIFT)));
 }
+#else
+#error Your architecture doesn't provide mmap() !?
 #endif
 
 #endif /* _LD_SYSCALL_H_ */

ldso/ldso/i386/dl-syscalls.h

@@ -3,4 +3,3 @@
 extern int _dl_errno;
 #define __set_errno(X) {(_dl_errno) = (X);}
 #include "sys/syscall.h"
-

ldso/ldso/mips/dl-syscalls.h

@@ -4,3 +4,4 @@ extern int _dl_errno;
 #define __set_errno(X) {(_dl_errno) = (X);}
 #include "sys/syscall.h"
 
+#define MMAP_HAS_6_ARGS

ldso/ldso/powerpc/dl-syscalls.h

@@ -3,6 +3,8 @@
  * numbers used by the shared library loader.
  */
 
+#define MMAP_HAS_6_ARGS
+
 #define __NR_exit		  1
 #define __NR_read		  3
 #define __NR_write		  4

ldso/ldso/sh/dl-syscalls.h

@@ -3,3 +3,5 @@
 extern int _dl_errno;
 #define __set_errno(X) {(_dl_errno) = (X);}
 #include "sys/syscall.h"
+
+#define MMAP_HAS_6_ARGS

ldso/ldso/sparc/dl-syscalls.h

@@ -6,6 +6,8 @@
  *       sysdeps/linux/sparc/bits/syscalls.h at some point ...
  */
 
+#define MMAP_HAS_6_ARGS
+
 #define __NR_exit		  1
 #define __NR_read		  3
 #define __NR_write		  4

ldso/ldso/x86_64/dl-syscalls.h

@@ -3,3 +3,5 @@
 extern int _dl_errno;
 #define __set_errno(X) {(_dl_errno) = (X);}
 #include "sys/syscall.h"
+
+#define MMAP_HAS_6_ARGS