[Gcl-devel] Patch to support aarch64 relocs

[Jerry James]

Here are some new reloc types to handle, courtesy of the Fedora toolchain:

--- ./h/elf64_aarch64_reloc.h.orig 2014-09-06 09:45:30.000000000 -0600
+++ ./h/elf64_aarch64_reloc.h 2014-10-10 12:30:00.000000000 -0600
@@ -46,3 +46,12 @@
     case R_AARCH64_LDST128_ABS_LO12_NC: /* LD/ST128: (S+A) & 0xff0 */
       store_val(where,MASK(12) << 10,((s+a) & 0xff0) << 6);
       break;
+    case R_AARCH64_PREL64:
+      store_val(where,~0L,(s+a-p));
+      break;
+    case R_AARCH64_PREL32:
+      store_val(where,MASK(32),(s+a-p));
+      break;
+    case R_AARCH64_PREL16:
+      store_val(where,MASK(16),(s+a-p));
+      break;

Incidentally, maybe you would also be interested in this patch:

--- ./o/sfaslelf.c.orig 2014-09-06 09:45:30.000000000 -0600
+++ ./o/sfaslelf.c 2014-09-06 20:00:00.000000000 -0600
@@ -181,6 +181,7 @@ relocate(Sym *sym1,void *v,ul a,ul start
 #include RELOC_H

   default:
+    fprintf(stderr, "Unknown reloc type %lu\n", tp);
     massert(tp&~tp);

   }

I added that one to the Fedora build.  When one of the secondary
architecture teams contacts me to tell me that gcl failed to build for
them, they give me a log of the failed build.  With this patch in
place, if the build is due to an unhandled reloc type (which it has
been 3 times now), I already have the reloc number.  Otherwise, I'd
have to ask them to do a special build, diagnose the failure with gdb,
etc.

Regards,
-- 
Jerry James
http://www.jamezone.org/