From: Ian Lance Taylor <ian@airs.com>
Date: Fri, 11 Jun 1999 20:23:58 +0000 (+0000)
Subject: 	* reloc.c (_bfd_relocate_contents): Permit bitfield relocations to
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=44257b8b9dc15f3328edf0fc4647384a9bb2336e;p=binutils-gdb.git

	* reloc.c (_bfd_relocate_contents): Permit bitfield relocations to
	wrap if the relocation covers the high bit of an address.
---

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index e5edd46f3fe..0606b908194 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,5 +1,8 @@
 1999-06-11  Ian Lance Taylor  <ian@zembu.com>
 
+	* reloc.c (_bfd_relocate_contents): Permit bitfield relocations to
+	wrap if the relocation covers the high bit of an address.
+
 	* dwarf2.c (decode_line_info): Remove unused variable first_time.
 
 1999-06-10  Jakub Jelinek  <jj@ultra.linux.cz>
diff --git a/bfd/reloc.c b/bfd/reloc.c
index 9e8735e5ed6..360c1b2799b 100644
--- a/bfd/reloc.c
+++ b/bfd/reloc.c
@@ -1560,6 +1560,15 @@ _bfd_relocate_contents (howto, input_bfd, relocation, location)
 
 	  /* We just assume (b & ~ fieldmask) == 0.  */
 
+	  /* We explicitly permit wrap around if this relocation
+	     covers the high bit of an address.  The Linux kernel
+	     relies on it, and it is the only way to write assembler
+	     code which can run when loaded at a location 0x80000000
+	     away from the location at which it is linked.  */
+	  if (howto->bitsize + rightshift
+	      == bfd_arch_bits_per_address (input_bfd))
+	    break;
+
 	  sum = a + b;
 	  if (sum < a || (sum & ~ fieldmask) != 0)
 	    {