Patch genode_dyn.ld to not emit PHDR segments

This is important, because otherwise binutils will refuse to strip
Genode binaries, which causes runtime closures to explode, which
causes a giant image.elf, which takes so long to load that tests
break.

packages/genodelabs/default.nix

@@ -35,7 +35,11 @@ let
       version = builtins.substring 0 7 upstreamSources.rev;
       src = upstreamSources;
       nativeBuildInputs = [ expect gnumake tcl ];
-      patches = [ ./patches/binary-labels.patch ./patches/label-fail.patch ];
+      patches = [
+        ./patches/binary-labels.patch
+        ./patches/label-fail.patch
+        ./patches/phdr.patch
+      ];
       configurePhase = ''
         patchShebangs ./tool
         substituteInPlace repos/base/etc/tools.conf \

packages/genodelabs/patches/phdr.patch

@@ -0,0 +1,27 @@
+From 45c73b01d4609f59ca576141bc836baad8e468ed Mon Sep 17 00:00:00 2001
+From: Emery Hemingway <ehmry@posteo.net>
+Date: Thu, 28 Jan 2021 13:39:29 +0100
+Subject: [PATCH] genode_dyn.ld: do not emit PHDR segment
+
+Recent version of binutils check that PHDR segments are covered
+by a LOAD segment. In this case the unloaded PHDR segment can be
+ommited.
+---
+ repos/base/src/ld/genode_dyn.ld | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/repos/base/src/ld/genode_dyn.ld b/repos/base/src/ld/genode_dyn.ld
+index 5fa6ddc29e..57ec92f0f6 100644
+--- a/repos/base/src/ld/genode_dyn.ld
++++ b/repos/base/src/ld/genode_dyn.ld
+@@ -18,7 +18,6 @@
+ 
+ PHDRS
+ {
+-  phdr     PT_PHDR PHDRS;
+   interp   PT_INTERP;
+   ro       PT_LOAD;
+   rw       PT_LOAD;
+-- 
+2.29.2
+