From 2a67688880dc1a9cbb6308c22ea6e62ff4c51297 Mon Sep 17 00:00:00 2001
From: Mark Shinwell <shinwell@codesourcery.com>
Date: Tue, 15 May 2007 10:06:03 +0000
Subject: [PATCH] 	gas/ 	* app.c (do_scrub_chars): Don't damage \@
 pseudo-variables.

	gas/testsuite/
	* gas/arm/backslash-at.d: New.
	* gas/arm/backslash-at.s: New.
---
 gas/ChangeLog                        |  4 ++++
 gas/app.c                            |  9 +++++++++
 gas/testsuite/ChangeLog              |  5 +++++
 gas/testsuite/gas/arm/backslash-at.d | 16 ++++++++++++++++
 gas/testsuite/gas/arm/backslash-at.s | 16 ++++++++++++++++
 5 files changed, 50 insertions(+)
 create mode 100644 gas/testsuite/gas/arm/backslash-at.d
 create mode 100644 gas/testsuite/gas/arm/backslash-at.s

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 2a03e5acb1..85bbe26082 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,7 @@
+2007-05-15  Mark Shinwell  <shinwell@codesourcery.com>
+
+	* app.c (do_scrub_chars): Don't damage \@ pseudo-variables.
+
 2007-05-15  Vincent Riviere  <vincent.riviere@freesbee.fr>	
 
 	PR gas/3041
diff --git a/gas/app.c b/gas/app.c
index d2308596dc..aa180044e7 100644
--- a/gas/app.c
+++ b/gas/app.c
@@ -1219,6 +1219,15 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen)
 	  if ((symver_state != NULL) && (*symver_state == 0))
 	    goto de_fault;
 #endif
+
+#ifdef TC_ARM
+	  /* For the ARM, care is needed not to damage occurrences of \@
+	     by stripping the @ onwards.  Yuck.  */
+	  if (to > tostart && *(to - 1) == '\\')
+	    /* Do not treat the @ as a start-of-comment.  */
+	    goto de_fault;
+#endif
+
 #ifdef WARN_COMMENTS
 	  if (!found_comment)
 	    as_where (&found_comment_file, &found_comment);
diff --git a/gas/testsuite/ChangeLog b/gas/testsuite/ChangeLog
index 4b4b2dba88..05e191e56f 100644
--- a/gas/testsuite/ChangeLog
+++ b/gas/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2007-05-15  Mark Shinwell  <shinwell@codesourcery.com>
+
+	* gas/arm/backslash-at.d: New.
+	* gas/arm/backslash-at.s: New.
+
 2007-05-15  Vincent Riviere  <vincent.riviere@freesbee.fr>
 	    Nick Clifton  <nickc@redhat.com>
 
diff --git a/gas/testsuite/gas/arm/backslash-at.d b/gas/testsuite/gas/arm/backslash-at.d
new file mode 100644
index 0000000000..a51def5577
--- /dev/null
+++ b/gas/testsuite/gas/arm/backslash-at.d
@@ -0,0 +1,16 @@
+#objdump: -dr --prefix-addresses --show-raw-insn
+#name: Backslash-at for ARM
+
+.*:     file format .*arm.*
+
+Disassembly of section .text:
+00000000 <.text> 615c      	.short	0x615c
+00000002 <foo> e3a00000 	mov	r0, #0	; 0x0
+00000006 <foo\+0x4> e3a00000 	mov	r0, #0	; 0x0
+0000000a <foo\+0x8> e3a00000 	mov	r0, #0	; 0x0
+0000000e <foo\+0xc> e3a00001 	mov	r0, #1	; 0x1
+00000012 <foo\+0x10> e3a00001 	mov	r0, #1	; 0x1
+00000016 <foo\+0x14> e3a00001 	mov	r0, #1	; 0x1
+0000001a <foo\+0x18> e3a00002 	mov	r0, #2	; 0x2
+0000001e <foo\+0x1c> e3a00002 	mov	r0, #2	; 0x2
+00000022 <foo\+0x20> e3a00002 	mov	r0, #2	; 0x2
diff --git a/gas/testsuite/gas/arm/backslash-at.s b/gas/testsuite/gas/arm/backslash-at.s
new file mode 100644
index 0000000000..4975aea688
--- /dev/null
+++ b/gas/testsuite/gas/arm/backslash-at.s
@@ -0,0 +1,16 @@
+@ Check that \@ is not destroyed when assembling for the ARM.
+
+.macro bar
+	mov	r0, #\@
+	mov	r0, #\@@comment
+	mov	r0, #\@ @comment
+.endm
+
+.byte	'\\
+.byte	'\a
+
+foo:
+	bar
+	bar
+	bar
+
-- 
2.34.1