diff --git a/gas/ChangeLog b/gas/ChangeLog
index f3df01d507..64852b0ff6 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,16 @@
+2003-05-03  H.J. Lu <hjl@gnu.org>
+
+	* config/obj-elf.c (obj_elf_parse_section_letters): Make it a
+	fatal error for unknown section attribute.
+
+	* config/tc-alpha.c (alpha_elf_section_letter): Return -1 for
+	unknown section attribute.
+	* config/tc-ia64.c (ia64_elf_section_letter): Likewise.
+	* config/tc-ppc.c (ppc_section_letter): Likewise.
+
+	* config/tc-ia64.c (ia64_elf_section_letter): Handle 'o'.
+	(ia64_elf_section_type): Accept "unwind".
+
 2003-05-02  H.J. Lu <hjl@gnu.org>
 
 	* read.h (demand_copy_string): New.
diff --git a/gas/config/obj-elf.c b/gas/config/obj-elf.c
index 08e131fe30..ac836d7355 100644
--- a/gas/config/obj-elf.c
+++ b/gas/config/obj-elf.c
@@ -845,10 +845,7 @@ obj_elf_parse_section_letters (str, len)
 	      attr |= md_attr;
 	    else
 #endif
-	      {
-		as_warn ("%s", bad_msg);
-		attr = -1;
-	      }
+	      as_fatal ("%s", bad_msg);
 	  }
 	  break;
 	}
diff --git a/gas/config/tc-alpha.c b/gas/config/tc-alpha.c
index ec4668b0b8..fd1a0d8a58 100644
--- a/gas/config/tc-alpha.c
+++ b/gas/config/tc-alpha.c
@@ -5635,7 +5635,7 @@ alpha_elf_section_letter (letter, ptr_msg)
     return SHF_ALPHA_GPREL;
 
   *ptr_msg = _("Bad .section directive: want a,s,w,x,M,S,G,T in string");
-  return 0;
+  return -1;
 }
 
 /* Map SHF_ALPHA_GPREL to SEC_SMALL_DATA.  */
diff --git a/gas/config/tc-ia64.c b/gas/config/tc-ia64.c
index 7a8d5f5214..eacf471032 100644
--- a/gas/config/tc-ia64.c
+++ b/gas/config/tc-ia64.c
@@ -968,9 +968,11 @@ ia64_elf_section_letter (letter, ptr_msg)
 {
   if (letter == 's')
     return SHF_IA_64_SHORT;
+  else if (letter == 'o')
+    return SHF_LINK_ORDER;
 
-  *ptr_msg = _("Bad .section directive: want a,s,w,x,M,S,G,T in string");
-  return 0;
+  *ptr_msg = _("Bad .section directive: want a,o,s,w,x,M,S,G,T in string");
+  return -1;
 }
 
 /* Map SHF_IA_64_SHORT to SEC_SMALL_DATA.  */
@@ -1004,6 +1006,9 @@ ia64_elf_section_type (str, len)
   if (STREQ (ELF_STRING_ia64_unwind_once))
     return SHT_IA_64_UNWIND;
 
+  if (STREQ ("unwind"))
+    return SHT_IA_64_UNWIND;
+
   if (STREQ ("init_array"))
     return SHT_INIT_ARRAY;
 
diff --git a/gas/config/tc-ppc.c b/gas/config/tc-ppc.c
index 9da89b362f..6b62e6b9f2 100644
--- a/gas/config/tc-ppc.c
+++ b/gas/config/tc-ppc.c
@@ -2754,7 +2754,7 @@ ppc_section_letter (letter, ptr_msg)
     return SHF_EXCLUDE;
 
   *ptr_msg = _("Bad .section directive: want a,e,w,x,M,S,G,T in string");
-  return 0;
+  return -1;
 }
 
 int
diff --git a/gas/testsuite/ChangeLog b/gas/testsuite/ChangeLog
index 2da83f2f16..0822e43c09 100644
--- a/gas/testsuite/ChangeLog
+++ b/gas/testsuite/ChangeLog
@@ -1,3 +1,11 @@
+2003-05-03  H.J. Lu <hjl@gnu.org>
+
+	* gas/ia64/ia64.exp: Add unwind.
+
+	* gas/ia64/unwind.s: New. Test the new section attribute 'o'
+	and the new section type "unwind".
+	* gas/ia64/unwind.d: Likewise.
+
 2003-05-02  Chris Demetriou  <cgd@broadcom.com>
 
 	* gas/mips/mips.exp (mips_arch_init): Reimplement in
diff --git a/gas/testsuite/gas/ia64/ia64.exp b/gas/testsuite/gas/ia64/ia64.exp
index 57c0e381cb..4597ca144a 100644
--- a/gas/testsuite/gas/ia64/ia64.exp
+++ b/gas/testsuite/gas/ia64/ia64.exp
@@ -47,4 +47,5 @@ if [istarget "ia64-*"] then {
     run_dump_test "order"
     run_dump_test "global"
     run_dump_test "secname"
+    run_dump_test "unwind"
 }
diff --git a/gas/testsuite/gas/ia64/unwind.d b/gas/testsuite/gas/ia64/unwind.d
new file mode 100644
index 0000000000..b29ef01518
--- /dev/null
+++ b/gas/testsuite/gas/ia64/unwind.d
@@ -0,0 +1,30 @@
+#readelf: -S
+#name: ia64 unwind section
+
+There are 9 section headers, starting at offset 0xa0:
+
+Section Headers:
+  \[Nr\] Name              Type             Address           Offset
+       Size              EntSize          Flags  Link  Info  Align
+  \[ 0\]                   NULL             0000000000000000  00000000
+       0000000000000000  0000000000000000           0     0     0
+  \[ 1\] \.text             PROGBITS         0000000000000000  00000040
+       0000000000000000  0000000000000000  AX       0     0     16
+  \[ 2\] \.data             PROGBITS         0000000000000000  00000040
+       0000000000000000  0000000000000000  WA       0     0     1
+  \[ 3\] \.bss              NOBITS           0000000000000000  00000040
+       0000000000000000  0000000000000000  WA       0     0     1
+  \[ 4\] \.IA_64\.unwind_inf PROGBITS         0000000000000000  00000040
+       0000000000000008  0000000000000000   A       0     0     8
+  \[ 5\] \.IA_64\.unwind     IA_64_UNWIND     0000000000000000  00000048
+       0000000000000008  0000000000000000  AL       1     1     8
+  \[ 6\] \.shstrtab         STRTAB           0000000000000000  00000050
+       000000000000004d  0000000000000000           0     0     1
+  \[ 7\] \.symtab           SYMTAB           0000000000000000  000002e0
+       0000000000000090  0000000000000018           8     6     8
+  \[ 8\] \.strtab           STRTAB           0000000000000000  00000370
+       0000000000000001  0000000000000000           0     0     1
+Key to Flags:
+  W \(write\), A \(alloc\), X \(execute\), M \(merge\), S \(strings\)
+  I \(info\), L \(link order\), G \(group\), x \(unknown\)
+  O \(extra OS processing required\) o \(OS specific\), p \(processor specific\)
diff --git a/gas/testsuite/gas/ia64/unwind.s b/gas/testsuite/gas/ia64/unwind.s
new file mode 100644
index 0000000000..a8c2be0242
--- /dev/null
+++ b/gas/testsuite/gas/ia64/unwind.s
@@ -0,0 +1,4 @@
+	.section .IA_64.unwind_info, "a", "progbits"
+	data8 1234
+	.section .IA_64.unwind, "ao", "unwind"
+	data8 1234