add sh fdpic subarch variants

with this commit it should be possible to produce a working
static-linked fdpic libc and application binaries for sh.

the changes in reloc.h are largely unused at this point since dynamic
linking is not supported, but the CRTJMP macro is used one place
outside of dynamic linking, in __unmapself.

arch/sh/reloc.h

@@ -12,7 +12,13 @@
 #define FP_SUFFIX "-nofpu"
 #endif
 
-#define LDSO_ARCH "sh" ENDIAN_SUFFIX FP_SUFFIX
+#if __SH_FDPIC__
+#define ABI_SUFFIX "-fdpic"
+#else
+#define ABI_SUFFIX ""
+#endif
+
+#define LDSO_ARCH "sh" ENDIAN_SUFFIX FP_SUFFIX ABI_SUFFIX
 
 #define TPOFF_K 8
 
@@ -26,5 +32,14 @@
 #define REL_DTPOFF      R_SH_TLS_DTPOFF32
 #define REL_TPOFF       R_SH_TLS_TPOFF32
 
+#if __SH_FDPIC__
+#define REL_FUNCDESC    R_SH_FUNCDESC
+#define REL_FUNCDESC_VAL R_SH_FUNCDESC_VALUE
+#undef  REL_RELATIVE
+#define CRTJMP(pc,sp) __asm__ __volatile__( \
+	"mov.l @%0+,r0 ; mov.l @%0,r12 ; jmp @r0 ; mov %1,r15" \
+	: : "r"(pc), "r"(sp) : "r0", "memory" )
+#else
 #define CRTJMP(pc,sp) __asm__ __volatile__( \
 	"jmp @%0 ; mov %1,r15" : : "r"(pc), "r"(sp) : "memory" )
+#endif

configure

@@ -558,6 +558,10 @@ fi
 else
 SUBARCH=${SUBARCH}-nofpu
 fi
+if trycppif __SH_FDPIC__ "$t" ; then
+SUBARCH=${SUBARCH}-fdpic
+shared=no
+fi
 fi
 
 test "$SUBARCH" \