From: Iain Sandoe <iain@sandoe.co.uk>
Date: Fri, 9 Apr 2021 12:40:11 +0000 (+0100)
Subject: libiberty, Darwin : Fix simple-object LTO table for cross-endian case.
X-Git-Tag: releases/gcc-10.4.0~87
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d1618884bc3d0013df18a1e550357e6156e9a5ed;p=thirdparty%2Fgcc.git

libiberty, Darwin : Fix simple-object LTO table for cross-endian case.

We encapsulate streamed IR in three special sections with a table
that describes their entries.  The table is expected to be written
with native endianness for the target, but for cross-endian cross-
compilation the swapping was omitted.  Fixed thus.

Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>

libiberty/ChangeLog:

	* simple-object-mach-o.c (simple_object_mach_o_write_segment):
	Arrange to swap the LTO index tables where needed.

(cherry picked from commit 220c410162ebece4fffa2912ed79e348d3731d77)
---

diff --git a/libiberty/simple-object-mach-o.c b/libiberty/simple-object-mach-o.c
index 14f53428643e..f36b9640ebe1 100644
--- a/libiberty/simple-object-mach-o.c
+++ b/libiberty/simple-object-mach-o.c
@@ -1225,6 +1225,11 @@ simple_object_mach_o_write_segment (simple_object_write *sobj, int descriptor,
 	index[4 * i] -= index[0];
       index[0] = 0;
 
+      /* Swap the indices, if required.  */
+
+      for (i = 0; i < (nsects_in * 4); ++i)
+	set_32 ((unsigned char *) &index[i], index[i]);
+
       sechdr_offset += sechdrsize;
 
       /* Write out the section names.