From 6ef6d01185c423643a23d6b02acbac104f0795fd Mon Sep 17 00:00:00 2001
From: chn <chn@chn.moe>
Date: Thu, 25 Sep 2025 08:30:18 +0800
Subject: [PATCH] lib.buildNixpkgsConfig: fix xen build

---
 flake/lib/buildNixpkgsConfig/default.nix |  1 +
 flake/lib/buildNixpkgsConfig/xen.patch   | 15 +++++++++++++++
 2 files changed, 16 insertions(+)
 create mode 100644 flake/lib/buildNixpkgsConfig/xen.patch

diff --git a/flake/lib/buildNixpkgsConfig/default.nix b/flake/lib/buildNixpkgsConfig/default.nix
index 3d0d08be..9594bbaf 100644
--- a/flake/lib/buildNixpkgsConfig/default.nix
+++ b/flake/lib/buildNixpkgsConfig/default.nix
@@ -115,6 +115,7 @@ in platformConfig //
         assimp = prev.assimp.override { stdenv = final.genericPackages.stdenv; };
         redis = prev.redis.overrideAttrs (prev: { doCheck = false; });
         wannier90 = prev.wannier90.overrideAttrs { buildFlags = [ "dynlib" ]; };
+        xen = prev.xen.overrideAttrs (prev: { patches = prev.patches or [] ++ [ ./xen.patch ]; });
       #   libinsane = prev.libinsane.overrideAttrs (prev:
       #     { nativeCheckInputs = builtins.filter (p: p.pname != "valgrind") prev.nativeCheckInputs; });
         lib2geom = prev.lib2geom.overrideAttrs (prev: { doCheck = false; });
diff --git a/flake/lib/buildNixpkgsConfig/xen.patch b/flake/lib/buildNixpkgsConfig/xen.patch
new file mode 100644
index 00000000..0b1a3aa3
--- /dev/null
+++ b/flake/lib/buildNixpkgsConfig/xen.patch
@@ -0,0 +1,15 @@
+diff --git a/xen/arch/x86/boot/Makefile b/xen/arch/x86/boot/Makefile
+index d45787665907..80c32163fbbd 100644
+--- a/xen/arch/x86/boot/Makefile
++++ b/xen/arch/x86/boot/Makefile
+@@ -40,8 +40,8 @@ LD32 := $(LD) $(subst x86_64,i386,$(LDFLAGS_DIRECT))
+ # are affected by both text_diff and text_gap.  Ensure the sum of gap and diff
+ # is greater than 2^16 so that any 16bit relocations if present in the object
+ # file turns into a build-time error.
+-text_gap := 0x010200
+-text_diff := 0x408020
++text_gap := 0x010240
++text_diff := 0x608040
+ 
+ $(obj)/build32.base.lds: AFLAGS-y += -DGAP=$(text_gap) -DTEXT_DIFF=$(text_diff)
+ $(obj)/build32.offset.lds: AFLAGS-y += -DGAP=$(text_gap) -DTEXT_DIFF=$(text_diff) -DAPPLY_OFFSET