From: Mark Wielaard <mark@klomp.org>
Date: Tue, 17 Nov 2020 14:08:05 +0000 (+0100)
Subject: backends: Handle SHT_X86_64_UNWIND as valid relocation target type.
X-Git-Tag: elfutils-0.183~93
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=00a25cf38d56bacae6b82c79cf226c22d12295a5;p=thirdparty%2Felfutils.git

backends: Handle SHT_X86_64_UNWIND as valid relocation target type.

The x86_64 abi defines a special section type for .eh_frame[_hdr],
SHT_X86_64_UNWIND, which is a valid relocation target type.

https://sourceware.org/bugzilla/show_bug.cgi?id=26878

Signed-off-by: Mark Wielaard <mark@klomp.org>
---

diff --git a/backends/ChangeLog b/backends/ChangeLog
index 81d4127c0..e88dedf93 100644
--- a/backends/ChangeLog
+++ b/backends/ChangeLog
@@ -1,3 +1,8 @@
+2020-11-17  Mark Wielard  <mark@klomp.org>
+
+	* x86_64_symbol.c (x86_64_check_reloc_target_type): New function.
+	* x86_64_init.c (x86_64_init): Hook check_reloc_target_type.
+
 2020-10-19  Mark Wielard  <mark@klomp.org>
 
 	* Makefile.am (modules): Remove tilegx.
diff --git a/backends/x86_64_init.c b/backends/x86_64_init.c
index 8db9b6438..be965fa6b 100644
--- a/backends/x86_64_init.c
+++ b/backends/x86_64_init.c
@@ -63,6 +63,7 @@ x86_64_init (Elf *elf __attribute__ ((unused)),
   eh->frame_nregs = 17;
   HOOK (eh, set_initial_registers_tid);
   HOOK (eh, unwind);
+  HOOK (eh, check_reloc_target_type);
 
   return eh;
 }
diff --git a/backends/x86_64_symbol.c b/backends/x86_64_symbol.c
index 98457bcb8..d5f62e8f7 100644
--- a/backends/x86_64_symbol.c
+++ b/backends/x86_64_symbol.c
@@ -71,3 +71,11 @@ x86_64_section_type_name (int type,
 
   return NULL;
 }
+
+/* The SHT_X86_64_UNWIND section type is a valid target for relocation.  */
+bool
+x86_64_check_reloc_target_type (Ebl *ebl __attribute__ ((unused)),
+				Elf64_Word sh_type)
+{
+  return sh_type == SHT_X86_64_UNWIND;
+}