Consider TLS_DTV_OFFSET when calculating the TLS range.

The dynamic thread vector (DTV) pointers may point 0x8000 past the start of
each TLS block. This is at least true for PowerPC and Mips platforms.

src/rt/sections_linux.d

@@ -820,12 +820,40 @@ struct tls_index
 
 extern(C) void* __tls_get_addr(tls_index* ti);
 
+/* The dynamic thread vector (DTV) pointers may point 0x8000 past the start of
+ * each TLS block. This is at least true for PowerPC and Mips platforms.
+ * See: https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/powerpc/dl-tls.h;h=f7cf6f96ebfb505abfd2f02be0ad0e833107c0cd;hb=HEAD#l34
+ *      https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/mips/dl-tls.h;h=93a6dc050cb144b9f68b96fb3199c60f5b1fcd18;hb=HEAD#l32
+ */
+version(X86)
+    enum TLS_DTV_OFFSET = 0x;
+else version(X86_64)
+    enum TLS_DTV_OFFSET = 0x;
+else version(ARM)
+    enum TLS_DTV_OFFSET = 0x;
+else version(AArch64)
+    enum TLS_DTV_OFFSET = 0x;
+else version(SPARC)
+    enum TLS_DTV_OFFSET = 0x;
+else version(SPARC64)
+    enum TLS_DTV_OFFSET = 0x;
+else version(PPC)
+    enum TLS_DTV_OFFSET = 0x8000;
+else version(PPC64)
+    enum TLS_DTV_OFFSET = 0x8000;
+else version(MIPS)
+    enum TLS_DTV_OFFSET = 0x8000;
+else version(MIPS64)
+    enum TLS_DTV_OFFSET = 0x8000;
+else
+    static assert( false, "Platform not supported." );
+
 void[] getTLSRange(size_t mod, size_t sz)
 {
     if (mod == 0)
         return null;
 
     // base offset
     auto ti = tls_index(mod, 0);
-    return __tls_get_addr(&ti)[0 .. sz];
+    return (__tls_get_addr(&ti)-TLS_DTV_OFFSET)[0 .. sz];
 }