[uml-devel] [PATCH] UML: UML libc linking error fix

[Matthew R. M. <ma...@ug...>]

From: Matthew Maurer <ma...@ug...>

Fixes linking for UML against newer libcs by adding two hidden symbols
which are now expected.
Signed-off-by: Matthew Maurer <ma...@ug...>
---
Apologies ahead of time if I've missed something or if this has already
been fixed somewhere I couldn't find it.
diff --git a/arch/um/kernel/dyn.lds.S b/arch/um/kernel/dyn.lds.S
index 7fcad58..85babf5 100644
--- a/arch/um/kernel/dyn.lds.S
+++ b/arch/um/kernel/dyn.lds.S
@@ -50,8 +50,21 @@ SECTIONS
   .rela.got       : { *(.rela.got) }
   .rel.bss        : { *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*) }
   .rela.bss       : { *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*) }
-  .rel.plt        : { *(.rel.plt) }
-  .rela.plt       : { *(.rela.plt) }
+  /* Deal with multilib libc */
+  .rel.plt        :
+  {
+    *(.rel.plt)
+    PROVIDE_HIDDEN (__rel_iplt_start = .);
+    *(.rel.iplt)
+    PROVIDE_HIDDEN (__rel_iplt_end = .);
+  }
+  .rela.plt       :
+  {
+    *(.rela.plt)
+    PROVIDE_HIDDEN (__rela_iplt_start = .);
+    *(.rela.iplt)
+    PROVIDE_HIDDEN (__rela_iplt_end = .);
+  }
   .init           : {
     KEEP (*(.init))
   } =0x90909090
diff --git a/arch/um/kernel/uml.lds.S b/arch/um/kernel/uml.lds.S
index e7a6cca..50d80e8 100644
--- a/arch/um/kernel/uml.lds.S
+++ b/arch/um/kernel/uml.lds.S
@@ -35,6 +35,21 @@ SECTIONS
     *(.gnu.warning)
     *(.gnu.linkonce.t*)
   }
+  /* Deal with multilib libc */
+  .rel.plt        :
+  {
+    *(.rel.plt)
+    PROVIDE_HIDDEN (__rel_iplt_start = .);
+    *(.rel.iplt)
+    PROVIDE_HIDDEN (__rel_iplt_end = .);
+  }
+  .rela.plt       :
+  {
+    *(.rela.plt)
+    PROVIDE_HIDDEN (__rela_iplt_start = .);
+    *(.rela.iplt)
+    PROVIDE_HIDDEN (__rela_iplt_end = .);
+  }

   . = ALIGN(PAGE_SIZE);
   .syscall_stub : {
Signed-off-by: Matthew Maurer <ma...@ug...>