From 1d022697d9081c6c39c3aa950c245bff518ebce7 Mon Sep 17 00:00:00 2001
From: Paul Brook <paul@codesourcery.com>
Date: Tue, 7 Feb 2006 03:50:20 +0000
Subject: [PATCH] 2006-02-07  Paul Brook  <paul@codesourcery.com>

ld/
	* emultempl/armelf.em: Include elf/arm.h.
	(arm_elf_finish): Set low address bit if enty point is a Thumb
	function.
ld/testsuite/
	* ld-arm/arm-elf.exp: Add thumb-entry test.
	* ld-arm/thumb-entry.d: New test.
	* ld-arm/thumb-entry.s: New test.
---
 ld/ChangeLog                      |  6 ++++++
 ld/emultempl/armelf.em            | 27 ++++++++++++++++++++++-----
 ld/testsuite/ChangeLog            |  6 ++++++
 ld/testsuite/ld-arm/arm-elf.exp   |  3 +++
 ld/testsuite/ld-arm/thumb-entry.d |  3 +++
 ld/testsuite/ld-arm/thumb-entry.s |  8 ++++++++
 6 files changed, 48 insertions(+), 5 deletions(-)
 create mode 100644 ld/testsuite/ld-arm/thumb-entry.d
 create mode 100644 ld/testsuite/ld-arm/thumb-entry.s

diff --git a/ld/ChangeLog b/ld/ChangeLog
index 81a0e398158..2cb4fd08bcf 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,9 @@
+2006-02-07  Paul Brook  <paul@codesourcery.com>
+
+	* emultempl/armelf.em: Include elf/arm.h.
+	(arm_elf_finish): Set low address bit if enty point is a Thumb
+	function.
+
 2006-02-01  Danny Smith  <dannysmith@users.sourceforge.net>
 
 	* deffilep.y (def_image_name): If the image name does not have
diff --git a/ld/emultempl/armelf.em b/ld/emultempl/armelf.em
index 71498da1b33..bd74ab5705b 100644
--- a/ld/emultempl/armelf.em
+++ b/ld/emultempl/armelf.em
@@ -26,6 +26,8 @@
 test -z "$TARGET2_TYPE" && TARGET2_TYPE="rel"
 cat >>e${EMULATION_NAME}.c <<EOF
 
+#include "elf/arm.h"
+
 static char *thumb_entry_symbol = NULL;
 static bfd *bfd_for_interwork;
 static int byteswap_code = 0;
@@ -150,11 +152,25 @@ arm_elf_finish (void)
   /* Call the elf32.em routine.  */
   gld${EMULATION_NAME}_finish ();
 
-  if (thumb_entry_symbol == NULL)
-    return;
+  if (thumb_entry_symbol)
+    {
+      h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
+				FALSE, FALSE, TRUE);
+    }
+  else
+    {
+      struct elf_link_hash_entry * eh;
+
+      if (!entry_symbol.name)
+	return;
+
+      h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name,
+				FALSE, FALSE, TRUE);
+      eh = (struct elf_link_hash_entry *)h;
+      if (!h || ELF_ST_TYPE(eh->type) != STT_ARM_TFUNC)
+	return;
+    }
 
-  h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
-			    FALSE, FALSE, TRUE);
 
   if (h != (struct bfd_link_hash_entry *) NULL
       && (h->type == bfd_link_hash_defined
@@ -180,7 +196,8 @@ arm_elf_finish (void)
 
       sprintf_vma (buffer + 2, val);
 
-      if (entry_symbol.name != NULL && entry_from_cmdline)
+      if (thumb_entry_symbol != NULL && entry_symbol.name != NULL
+	  && entry_from_cmdline)
 	einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
 	       thumb_entry_symbol, entry_symbol.name);
       entry_symbol.name = buffer;
diff --git a/ld/testsuite/ChangeLog b/ld/testsuite/ChangeLog
index f7e13cdf4fe..d1692eda703 100644
--- a/ld/testsuite/ChangeLog
+++ b/ld/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2006-02-07  Paul Brook  <paul@codesourcery.com>
+
+	* ld-arm/arm-elf.exp: Add thumb-entry test.
+	* ld-arm/thumb-entry.d: New test.
+	* ld-arm/thumb-entry.s: New test.
+
 2006-02-04  Richard Sandiford  <richard@codesourcery.com>
 
 	* ld-mips-elf/tls-hidden2a.s, ld-mips-elf/tls-hidden2b.s,
diff --git a/ld/testsuite/ld-arm/arm-elf.exp b/ld/testsuite/ld-arm/arm-elf.exp
index 384b2899baf..76a743e1f2e 100644
--- a/ld/testsuite/ld-arm/arm-elf.exp
+++ b/ld/testsuite/ld-arm/arm-elf.exp
@@ -89,6 +89,9 @@ set armelftests {
     {"TLS dynamic application" "-T arm-dyn.ld tmpdir/tls-lib.so" "" {tls-app.s}
      {{objdump -fdw tls-app.d} {objdump -Rw tls-app.r}}
      "tls-app"}
+    {"Thumb entry point" "-T arm.ld" "" {thumb-entry.s}
+     {{readelf -h thumb-entry.d}}
+     "thumb-entry"}
 }
 
 run_ld_link_tests $armelftests
diff --git a/ld/testsuite/ld-arm/thumb-entry.d b/ld/testsuite/ld-arm/thumb-entry.d
new file mode 100644
index 00000000000..602fd6cfb70
--- /dev/null
+++ b/ld/testsuite/ld-arm/thumb-entry.d
@@ -0,0 +1,3 @@
+#...
+  Entry point address:               0x8001
+#...
diff --git a/ld/testsuite/ld-arm/thumb-entry.s b/ld/testsuite/ld-arm/thumb-entry.s
new file mode 100644
index 00000000000..5b3659d9c0e
--- /dev/null
+++ b/ld/testsuite/ld-arm/thumb-entry.s
@@ -0,0 +1,8 @@
+	.text
+	.arch armv4t
+	.thumb
+	.global _start
+	.thumb_func
+_start:
+	bx lr
+	
-- 
2.30.2