From 1bce6bd86f99b05ddc311eb34545165983ff8ddc Mon Sep 17 00:00:00 2001
From: Paul Brook <paul@codesourcery.com>
Date: Mon, 9 May 2011 13:17:58 +0000
Subject: [PATCH] 2011-05-09  Paul Brook  <paul@codesourcery.com>

	bfd/
	* elf32-tic6x.c (is_tic6x_elf_unwind_section_name,
	elf32_tic6x_fake_sections): New functions.
	(elf_backend_fake_sections): Define.

	gas/
	* config/tc-tic6x.c (streq): Define.
	(tic6x_get_unwind): New.
	(s_tic6x_cantunwind, s_tic6x_handlerdata, s_tic6x_endp,
	s_tic6x_personalityindex, s_tic6x_personality): New functions.
	(md_pseudo_table): Add "endp", "handlerdata", "personalityindex",
	"personality" and "cantunwind".
	(tic6x_regname_to_dw2regnum, tic6x_frame_initial_instructions,
	tic6x_start_unwind_section, tic6x_unwind_frame_regs,
	tic6x_pop_rts_offset_little, tic6x_pop_rts_offset_big,
	tic6x_unwind_reg_from_dwarf, tic6x_flush_unwind_word,
	tic6x_unwind_byte, tic6x_unwind_2byte, tic6x_unwind_uleb,
	tic6x_cfi_startproc, output_exidx_entry, tic6x_output_unwinding,
	tic6x_cfi_endproc): New.
	* config/tc-tic6x.h (TIC6X_NUM_UNWIND_REGS): Define.
	(tic6x_unwind_info): New.
	(tic6x_segment_info_type): Add marked_pr_dependency, unwind and
	text_unwind.
	(TARGET_USE_CFIPOP, tc_regname_to_dw2regnum,
	tc_cfi_frame_initial_instructions, DWARF2_DEFAULT_RETURN_COLUMN,
	DWARF2_CIE_DATA_ALIGNMENT, tc_cfi_startproc, tc_cfi_endproc,
	tc_cfi_section_name): Define.
	* doc/c-tic6x.texi: Document new unwinding directives.
	* dw2gencfi.c (tc_cfi_startproc, tc_cfi_endproc): Add default
	definitions.
	(cfi_insn_data, fde_entry, CFI_adjust_cfa_offset, CFI_return_column,
	CFI_rel_offset, CFI_escape, CFI_signal_frame, CFI_val_encoded_addr):
	Move to dw2gencfi.h.
	(CFI_EMIT_target): Define.
	(dot_cfi_sections): Check tc_cfi_section_name.
	(dot_cfi_startproc): Use tc_cfi_startproc.
	(dot_cfi_endproc): Use tc_cfi_endproc.
	* dw2gencfi.h (cfi_insn_data, fde_entry, CFI_adjust_cfa_offset,
	CFI_return_column, CFI_rel_offset, CFI_escape, CFI_signal_frame,
	CFI_val_encoded_addr):  Move to here from dw2gencfi.c.

	gas/testsuite:
	* gas/tic6x/unwind-1.d: New test.
	* gas/tic6x/unwind-1.s: New test.
	* gas/tic6x/unwind-2.d: New test.
	* gas/tic6x/unwind-2.s: New test.
	* gas/tic6x/unwind-3.d: New test.
	* gas/tic6x/unwind-3.s: New test.
	* gas/tic6x/unwind-bad-1.d: New test.
	* gas/tic6x/unwind-bad-1.s: New test.
	* gas/tic6x/unwind-bad-1.l: New test.
	* gas/tic6x/unwind-bad-2.d: New test.
	* gas/tic6x/unwind-bad-2.s: New test.
	* gas/tic6x/unwind-bad-2.l: New test.

	include/
	* elf/tic6x.h (ELF_STRING_C6000_unwind,
	ELF_STRING_C6000_unwind_info, ELF_STRING_C6000_unwind_once,
	ELF_STRING_C6000_unwind_info_once): Define.
---
 bfd/ChangeLog                          |   6 +
 bfd/elf32-tic6x.c                      |  31 +
 gas/ChangeLog                          |  37 +
 gas/config/tc-tic6x.c                  | 997 ++++++++++++++++++++++++-
 gas/config/tc-tic6x.h                  |  65 ++
 gas/doc/c-tic6x.texi                   |  32 +
 gas/dw2gencfi.c                        |  98 +--
 gas/dw2gencfi.h                        |  77 ++
 gas/testsuite/ChangeLog                |  15 +
 gas/testsuite/gas/tic6x/unwind-1.d     | 100 +++
 gas/testsuite/gas/tic6x/unwind-1.s     | 242 ++++++
 gas/testsuite/gas/tic6x/unwind-2.d     | 100 +++
 gas/testsuite/gas/tic6x/unwind-2.s     | 242 ++++++
 gas/testsuite/gas/tic6x/unwind-3.d     |  18 +
 gas/testsuite/gas/tic6x/unwind-3.s     |  33 +
 gas/testsuite/gas/tic6x/unwind-bad-1.d |   3 +
 gas/testsuite/gas/tic6x/unwind-bad-1.l |  12 +
 gas/testsuite/gas/tic6x/unwind-bad-1.s |  62 ++
 gas/testsuite/gas/tic6x/unwind-bad-2.d |   3 +
 gas/testsuite/gas/tic6x/unwind-bad-2.l |  14 +
 gas/testsuite/gas/tic6x/unwind-bad-2.s | 113 +++
 include/ChangeLog                      |   6 +
 include/elf/tic6x.h                    |   6 +
 23 files changed, 2236 insertions(+), 76 deletions(-)
 create mode 100644 gas/testsuite/gas/tic6x/unwind-1.d
 create mode 100644 gas/testsuite/gas/tic6x/unwind-1.s
 create mode 100644 gas/testsuite/gas/tic6x/unwind-2.d
 create mode 100644 gas/testsuite/gas/tic6x/unwind-2.s
 create mode 100644 gas/testsuite/gas/tic6x/unwind-3.d
 create mode 100644 gas/testsuite/gas/tic6x/unwind-3.s
 create mode 100644 gas/testsuite/gas/tic6x/unwind-bad-1.d
 create mode 100644 gas/testsuite/gas/tic6x/unwind-bad-1.l
 create mode 100644 gas/testsuite/gas/tic6x/unwind-bad-1.s
 create mode 100644 gas/testsuite/gas/tic6x/unwind-bad-2.d
 create mode 100644 gas/testsuite/gas/tic6x/unwind-bad-2.l
 create mode 100644 gas/testsuite/gas/tic6x/unwind-bad-2.s

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 57025970efb..e04ede9e96f 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,9 @@
+2011-05-09  Paul Brook  <paul@codesourcery.com>
+
+	* elf32-tic6x.c (is_tic6x_elf_unwind_section_name,
+	elf32_tic6x_fake_sections): New functions.
+	(elf_backend_fake_sections): Define.
+
 2011-05-09  Paul Brook  <paul@codesourcery.com>
 
 	* elf32-tic6x.c (elf32_tic6x_gc_mark_extra_sections): New function.
diff --git a/bfd/elf32-tic6x.c b/bfd/elf32-tic6x.c
index 6b1065432fa..a70ef01c05b 100644
--- a/bfd/elf32-tic6x.c
+++ b/bfd/elf32-tic6x.c
@@ -1886,6 +1886,36 @@ elf32_tic6x_gc_mark_extra_sections (struct bfd_link_info *info,
   return TRUE;
 }
 
+/* Return TRUE if this is an unwinding table index.  */
+
+static bfd_boolean
+is_tic6x_elf_unwind_section_name (const char *name)
+{
+  return (CONST_STRNEQ (name, ELF_STRING_C6000_unwind)
+	  || CONST_STRNEQ (name, ELF_STRING_C6000_unwind_once));
+}
+
+
+/* Set the type and flags for an unwinding index table.  We do this by
+   the section name, which is a hack, but ought to work.  */
+
+static bfd_boolean
+elf32_tic6x_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
+			   Elf_Internal_Shdr *hdr, asection *sec)
+{
+  const char * name;
+
+  name = bfd_get_section_name (abfd, sec);
+
+  if (is_tic6x_elf_unwind_section_name (name))
+    {
+      hdr->sh_type = SHT_C6000_UNWIND;
+      hdr->sh_flags |= SHF_LINK_ORDER;
+    }
+
+  return TRUE;
+}
+
 /* Update the got entry reference counts for the section being removed.  */
 
 static bfd_boolean
@@ -3979,6 +4009,7 @@ elf32_tic6x_copy_private_data (bfd * ibfd, bfd * obfd)
 #define elf_backend_plt_readonly	1
 #define elf_backend_rela_normal		1
 #define elf_backend_got_header_size     8
+#define elf_backend_fake_sections       elf32_tic6x_fake_sections
 #define elf_backend_gc_sweep_hook	elf32_tic6x_gc_sweep_hook
 #define elf_backend_gc_mark_extra_sections elf32_tic6x_gc_mark_extra_sections
 #define elf_backend_modify_program_headers \
diff --git a/gas/ChangeLog b/gas/ChangeLog
index 37da802241c..aba8bc5503e 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,40 @@
+2011-05-09  Paul Brook  <paul@codesourcery.com>
+
+	* config/tc-tic6x.c (streq): Define.
+	(tic6x_get_unwind): New.
+	(s_tic6x_cantunwind, s_tic6x_handlerdata, s_tic6x_endp,
+	s_tic6x_personalityindex, s_tic6x_personality): New functions.
+	(md_pseudo_table): Add "endp", "handlerdata", "personalityindex",
+	"personality" and "cantunwind".
+	(tic6x_regname_to_dw2regnum, tic6x_frame_initial_instructions,
+	tic6x_start_unwind_section, tic6x_unwind_frame_regs,
+	tic6x_pop_rts_offset_little, tic6x_pop_rts_offset_big,
+	tic6x_unwind_reg_from_dwarf, tic6x_flush_unwind_word,
+	tic6x_unwind_byte, tic6x_unwind_2byte, tic6x_unwind_uleb,
+	tic6x_cfi_startproc, output_exidx_entry, tic6x_output_unwinding,
+	tic6x_cfi_endproc): New.
+	* config/tc-tic6x.h (TIC6X_NUM_UNWIND_REGS): Define.
+	(tic6x_unwind_info): New.
+	(tic6x_segment_info_type): Add marked_pr_dependency, unwind and
+	text_unwind.
+	(TARGET_USE_CFIPOP, tc_regname_to_dw2regnum,
+	tc_cfi_frame_initial_instructions, DWARF2_DEFAULT_RETURN_COLUMN,
+	DWARF2_CIE_DATA_ALIGNMENT, tc_cfi_startproc, tc_cfi_endproc,
+	tc_cfi_section_name): Define.
+	* doc/c-tic6x.texi: Document new unwinding directives.
+	* dw2gencfi.c (tc_cfi_startproc, tc_cfi_endproc): Add default
+	definitions.
+	(cfi_insn_data, fde_entry, CFI_adjust_cfa_offset, CFI_return_column,
+	CFI_rel_offset, CFI_escape, CFI_signal_frame, CFI_val_encoded_addr):
+	Move to dw2gencfi.h.
+	(CFI_EMIT_target): Define.
+	(dot_cfi_sections): Check tc_cfi_section_name.
+	(dot_cfi_startproc): Use tc_cfi_startproc.
+	(dot_cfi_endproc): Use tc_cfi_endproc.
+	* dw2gencfi.h (cfi_insn_data, fde_entry, CFI_adjust_cfa_offset,
+	CFI_return_column, CFI_rel_offset, CFI_escape, CFI_signal_frame,
+	CFI_val_encoded_addr):  Move to here from dw2gencfi.c.
+
 2011-05-07  Alan Modra  <amodra@gmail.com>
 
 	* dw2gencfi.c (CUR_SEG, SET_CUR_SEG, HANDLED, SET_HANDLED): Define.
diff --git a/gas/config/tc-tic6x.c b/gas/config/tc-tic6x.c
index 15ce88a68e8..73bea632651 100644
--- a/gas/config/tc-tic6x.c
+++ b/gas/config/tc-tic6x.c
@@ -23,6 +23,7 @@
 
 #include "as.h"
 #include "dwarf2dbg.h"
+#include "dw2gencfi.h"
 #include "safe-ctype.h"
 #include "subsegs.h"
 #include "opcode/tic6x.h"
@@ -34,6 +35,8 @@
 #define TRUNC(X)	((valueT) (X) & 0xffffffffU)
 #define SEXT(X)		((TRUNC (X) ^ 0x80000000U) - 0x80000000U)
 
+#define streq(a, b)           (strcmp (a, b) == 0)
+
 /* Stuff for .scomm symbols.  */
 static segT sbss_section;
 static asection scom_section;
@@ -162,6 +165,49 @@ static const tic6x_arch_table tic6x_arches[] =
 				      | TIC6X_INSN_C674X) }
   };
 
+/* Caller saved register encodings.  The standard frame layout uses this
+   order, starting from the highest address.  There must be
+   TIC6X_NUM_UNWIND_REGS values.  */
+enum
+{
+  UNWIND_A15,
+  UNWIND_B15,
+  UNWIND_B14,
+  UNWIND_B13,
+  UNWIND_B12,
+  UNWIND_B11,
+  UNWIND_B10,
+  UNWIND_B3,
+  UNWIND_A14,
+  UNWIND_A13,
+  UNWIND_A12,
+  UNWIND_A11,
+  UNWIND_A10
+};
+
+static void tic6x_output_unwinding (bfd_boolean need_extab);
+
+/* Return the frame unwind state for the current function, allocating
+   as necessary.  */
+
+static tic6x_unwind_info *tic6x_get_unwind (void)
+{
+  tic6x_unwind_info *unwind;
+
+  unwind = seg_info (now_seg)->tc_segment_info_data.unwind;
+  if (unwind)
+    return unwind;
+
+  unwind = seg_info (now_seg)->tc_segment_info_data.text_unwind;
+  if (unwind)
+    return unwind;
+
+  unwind = (tic6x_unwind_info *)xmalloc (sizeof (tic6x_unwind_info));
+  seg_info (now_seg)->tc_segment_info_data.unwind = unwind;
+  memset (unwind, 0, sizeof (*unwind));
+  return unwind;
+}
+
 /* Update the selected architecture based on ARCH, giving an error if
    ARCH is an invalid value.  Does not call tic6x_update_features; the
    caller must do that if necessary.  */
@@ -325,8 +371,122 @@ tic6x_after_parse_args (void)
   tic6x_update_features ();
 }
 
-/* Parse a .arch directive.  */
+/* Parse a .cantunwind directive.  */
+static void
+s_tic6x_cantunwind (int ignored ATTRIBUTE_UNUSED)
+{
+  tic6x_unwind_info *unwind = tic6x_get_unwind ();
+
+  /* GCC sometimes spits out superfluous .cantunwind directives, so ignore
+     them.  */
+  if (unwind->data_bytes == 0)
+    return;
+
+  if (unwind->data_bytes != -1)
+    {
+      as_bad (_("unexpected .cantunwind directive"));
+      return;
+    }
+
+  demand_empty_rest_of_line ();
+
+  if (unwind->personality_routine || unwind->personality_index != -1)
+    as_bad (_("personality routine specified for cantunwind frame"));
+
+  unwind->personality_index = -2;
+}
+
+/* Parse a .handlerdata directive.  */
+static void
+s_tic6x_handlerdata (int ignored ATTRIBUTE_UNUSED)
+{
+  tic6x_unwind_info *unwind = tic6x_get_unwind ();
+
+  if (!unwind->saved_seg)
+    {
+      as_bad (_("unexpected .handlerdata directive"));
+      return;
+    }
+
+  if (unwind->table_entry || unwind->personality_index == -2)
+    {
+      as_bad (_("duplicate .handlerdata directive"));
+      return;
+    }
+
+  if (unwind->personality_index == -1 && unwind->personality_routine == NULL)
+    {
+      as_bad (_("personality routine required before .handlerdata directive"));
+      return;
+    }
+
+  tic6x_output_unwinding (TRUE);
+}
+
+/* Parse a .endp directive.  */
+static void
+s_tic6x_endp (int ignored ATTRIBUTE_UNUSED)
+{
+  tic6x_unwind_info *unwind = tic6x_get_unwind ();
+
+  if (unwind->data_bytes != 0)
+    {
+      /* Output a .exidx entry if we have not already done so.
+	 Then switch back to the text section.  */
+      if (!unwind->table_entry)
+	tic6x_output_unwinding (FALSE);
+
+      subseg_set (unwind->saved_seg, unwind->saved_subseg);
+    }
+
+  unwind->saved_seg = NULL;
+  unwind->table_entry = NULL;
+  unwind->data_bytes = 0;
+}
+
+/* Parse a .personalityindex directive.  */
+static void
+s_tic6x_personalityindex (int ignored ATTRIBUTE_UNUSED)
+{
+  tic6x_unwind_info *unwind = tic6x_get_unwind ();
+  expressionS exp;
+
+  if (unwind->personality_routine || unwind->personality_index != -1)
+    as_bad (_("duplicate .personalityindex directive"));
+
+  expression (&exp);
+
+  if (exp.X_op != O_constant
+      || exp.X_add_number < 0 || exp.X_add_number > 15)
+    {
+      as_bad (_("bad personality routine number"));
+      ignore_rest_of_line ();
+      return;
+    }
+
+  unwind->personality_index = exp.X_add_number;
+
+  demand_empty_rest_of_line ();
+}
 
+static void
+s_tic6x_personality (int ignored ATTRIBUTE_UNUSED)
+{
+  char *name, *p, c;
+  tic6x_unwind_info *unwind = tic6x_get_unwind ();
+
+  if (unwind->personality_routine || unwind->personality_index != -1)
+    as_bad (_("duplicate .personality directive"));
+
+  name = input_line_pointer;
+  c = get_symbol_end ();
+  p = input_line_pointer;
+  unwind->personality_routine = symbol_find_or_make (name);
+  *p = c;
+  demand_empty_rest_of_line ();
+}
+
+/* Parse a .arch directive.  */
 static void
 s_tic6x_arch (int ignored ATTRIBUTE_UNUSED)
 {
@@ -574,6 +734,11 @@ const pseudo_typeS md_pseudo_table[] =
     { "scomm",	s_tic6x_scomm, 0 },
     { "word", cons, 4 },
     { "ehtype", s_tic6x_ehtype, 0 },
+    { "endp", s_tic6x_endp, 0 },
+    { "handlerdata", s_tic6x_handlerdata, 0 },
+    { "personalityindex", s_tic6x_personalityindex, 0 },
+    { "personality", s_tic6x_personality, 0 },
+    { "cantunwind", s_tic6x_cantunwind, 0 },
     { 0, 0, 0 }
   };
 
@@ -1843,6 +2008,9 @@ tic6x_fix_adjustable (fixS *fixP)
     case BFD_RELOC_C6000_EHTYPE:
       return 0;
 
+    case BFD_RELOC_C6000_PREL31:
+      return 0;
+
     default:
       return 1;
     }
@@ -3806,6 +3974,11 @@ md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
 	}
       break;
 
+    case BFD_RELOC_C6000_PREL31:
+      /* Force output to the object file.  */
+      fixP->fx_done = 0;
+      break;
+
     default:
       abort ();
     }
@@ -4267,3 +4440,825 @@ tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp)
 
   return reloc;
 }
+
+/* Convert REGNAME to a DWARF-2 register number.  */
+
+int
+tic6x_regname_to_dw2regnum (char *regname)
+{
+  bfd_boolean reg_ok;
+  tic6x_register reg;
+  char *rq = regname;
+
+  reg_ok = tic6x_parse_register (&rq, &reg);
+
+  if (!reg_ok)
+    return -1;
+
+  switch (reg.side)
+    {
+    case 1: /* A regs.  */
+      if (reg.num < 16)
+	return reg.num;
+      else if (reg.num < 32)
+	return (reg.num - 16) + 37;
+      else
+	return -1;
+
+    case 2: /* B regs.  */
+      if (reg.num < 16)
+	return reg.num + 16;
+      else if (reg.num < 32)
+	return (reg.num - 16) + 53;
+      else
+	return -1;
+
+    default:
+      return -1;
+    }
+}
+
+/* Initialize the DWARF-2 unwind information for this procedure.  */
+
+void
+tic6x_frame_initial_instructions (void)
+{
+  /* CFA is initial stack pointer (B15).  */
+  cfi_add_CFA_def_cfa (31, 0);
+}
+
+/* Start an exception table entry.  If idx is nonzero this is an index table
+   entry.  */
+
+static void
+tic6x_start_unwind_section (const segT text_seg, int idx)
+{
+  tic6x_unwind_info *unwind = tic6x_get_unwind ();
+  const char * text_name;
+  const char * prefix;
+  const char * prefix_once;
+  const char * group_name;
+  size_t prefix_len;
+  size_t text_len;
+  char * sec_name;
+  size_t sec_name_len;
+  int type;
+  int flags;
+  int linkonce;
+
+  if (idx)
+    {
+      prefix = ELF_STRING_C6000_unwind;
+      prefix_once = ELF_STRING_C6000_unwind_once;
+      type = SHT_C6000_UNWIND;
+    }
+  else
+    {
+      prefix = ELF_STRING_C6000_unwind_info;
+      prefix_once = ELF_STRING_C6000_unwind_info_once;
+      type = SHT_PROGBITS;
+    }
+
+  text_name = segment_name (text_seg);
+  if (streq (text_name, ".text"))
+    text_name = "";
+
+  if (strncmp (text_name, ".gnu.linkonce.t.",
+	       strlen (".gnu.linkonce.t.")) == 0)
+    {
+      prefix = prefix_once;
+      text_name += strlen (".gnu.linkonce.t.");
+    }
+
+  prefix_len = strlen (prefix);
+  text_len = strlen (text_name);
+  sec_name_len = prefix_len + text_len;
+  sec_name = (char *) xmalloc (sec_name_len + 1);
+  memcpy (sec_name, prefix, prefix_len);
+  memcpy (sec_name + prefix_len, text_name, text_len);
+  sec_name[prefix_len + text_len] = '\0';
+
+  flags = SHF_ALLOC;
+  linkonce = 0;
+  group_name = 0;
+
+  /* Handle COMDAT group.  */
+  if (prefix != prefix_once && (text_seg->flags & SEC_LINK_ONCE) != 0)
+    {
+      group_name = elf_group_name (text_seg);
+      if (group_name == NULL)
+	{
+	  as_bad (_("group section `%s' has no group signature"),
+		  segment_name (text_seg));
+	  ignore_rest_of_line ();
+	  return;
+	}
+      flags |= SHF_GROUP;
+      linkonce = 1;
+    }
+
+  obj_elf_change_section (sec_name, type, flags, 0, group_name, linkonce, 0);
+
+  /* Set the section link for index tables.  */
+  if (idx)
+    elf_linked_to_section (now_seg) = text_seg;
+
+  seg_info (now_seg)->tc_segment_info_data.text_unwind = unwind;
+}
+
+
+static const int
+tic6x_unwind_frame_regs[TIC6X_NUM_UNWIND_REGS] = 
+/* A15 B15 B14 B13 B12 B11 B10  B3 A14 A13 A12 A11 A10.  */
+  { 15, 31, 30, 29, 28, 27, 26, 19, 14, 13, 12, 11, 10 };
+
+/* Register save offsets for __c6xabi_push_rts.  */
+static const int
+tic6x_pop_rts_offset_little[TIC6X_NUM_UNWIND_REGS] = 
+/* A15 B15 B14 B13 B12 B11 B10  B3 A14 A13 A12 A11 A10.  */
+  { -1,  1,  0, -3, -4, -7, -8,-11, -2, -5, -6, -9,-10};
+
+static const int
+tic6x_pop_rts_offset_big[TIC6X_NUM_UNWIND_REGS] = 
+/* A15 B15 B14 B13 B12 B11 B10  B3 A14 A13 A12 A11 A10.  */
+  { -2,  1,  0, -4, -3, -8, -7,-12, -1, -6, -5,-10, -9};
+
+/* Map from dwarf register number to unwind frame register number.  */
+static int
+tic6x_unwind_reg_from_dwarf (int dwarf)
+{
+  int reg;
+
+  for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++)
+    {
+      if (tic6x_unwind_frame_regs[reg] == dwarf)
+	return reg;
+    }
+
+  return -1;
+}
+
+/* Unwinding bytecode definitions.  */
+#define UNWIND_OP_ADD_SP  0x00
+#define UNWIND_OP_ADD_SP2 0xd2
+#define UNWIND_OP2_POP 0x8000
+#define UNWIND_OP2_POP_COMPACT 0xa000
+#define UNWIND_OP_POP_REG 0xc0
+#define UNWIND_OP_MV_FP 0xd0
+#define UNWIND_OP_POP_RTS 0xd1
+#define UNWIND_OP_RET 0xe0
+
+/* Maximum stack adjustment for __c6xabi_unwind_cpp_pr3/4 */
+#define MAX_COMPACT_SP_OFFSET (0x7f << 3)
+
+static void
+tic6x_flush_unwind_word (valueT data)
+{
+  tic6x_unwind_info *unwind = tic6x_get_unwind ();
+  char *ptr;
+
+  /* Create EXTAB entry if it does not exist.  */
+  if (unwind->table_entry == NULL)
+    {
+      tic6x_start_unwind_section (unwind->saved_seg, 0);
+      frag_align (2, 0, 0);
+      record_alignment (now_seg, 2);
+      unwind->table_entry = expr_build_dot ();
+      ptr = frag_more (4);
+      unwind->frag_start = ptr;
+    }
+  else
+    {
+      /* Append additional word of data.  */
+      ptr = frag_more (4);
+    }
+
+  md_number_to_chars (ptr, data, 4);
+}
+
+/* Add a single byte of unwinding data.  */
+
+static void
+tic6x_unwind_byte (int byte)
+{
+  tic6x_unwind_info *unwind = tic6x_get_unwind ();
+
+  unwind->data_bytes++;
+  /* Only flush the first word after we know multiple words are required.  */
+  if (unwind->data_bytes == 5)
+    {
+      if (unwind->personality_index == -1)
+	{
+	  /* At this point we know we are too big for pr0.  */
+	  unwind->personality_index = 1;
+	  tic6x_flush_unwind_word (0x81000000 | ((unwind->data >> 8) & 0xffff));
+	  unwind->data = ((unwind->data & 0xff) << 8) | byte;
+	  unwind->data_bytes++;
+	}
+      else
+	{
+	  tic6x_flush_unwind_word (unwind->data);
+	  unwind->data = byte;
+	}
+    }
+  else
+    {
+      unwind->data = (unwind->data << 8) | byte;
+      if ((unwind->data_bytes & 3) == 0 && unwind->data_bytes > 4)
+	{
+	  tic6x_flush_unwind_word (unwind->data);
+	  unwind->data = 0;
+	}
+    }
+}
+
+/* Add a two-byte unwinding opcode.  */
+static void
+tic6x_unwind_2byte (int bytes)
+{
+  tic6x_unwind_byte (bytes >> 8);
+  tic6x_unwind_byte (bytes & 0xff);
+}
+
+static void
+tic6x_unwind_uleb (offsetT offset)
+{
+  while (offset > 0x7f)
+    {
+      tic6x_unwind_byte ((offset & 0x7f) | 0x80);
+      offset >>= 7;
+    }
+  tic6x_unwind_byte (offset);
+}
+
+void
+tic6x_cfi_startproc (void)
+{
+  tic6x_unwind_info *unwind = tic6x_get_unwind ();
+
+  unwind->personality_index = -1;
+  unwind->personality_routine = NULL;
+  if (unwind->table_entry)
+    as_bad (_("missing .endp before .cfi_startproc"));
+
+  unwind->table_entry = NULL;
+  unwind->data_bytes = -1;
+}
+
+static void
+tic6x_output_exidx_entry (void)
+{
+  char *ptr;
+  long where;
+  unsigned int marked_pr_dependency;
+  segT old_seg;
+  subsegT old_subseg;
+  tic6x_unwind_info *unwind = tic6x_get_unwind ();
+
+  old_seg = now_seg;
+  old_subseg = now_subseg;
+
+  /* Add index table entry.  This is two words.	 */
+  tic6x_start_unwind_section (unwind->saved_seg, 1);
+  frag_align (2, 0, 0);
+  record_alignment (now_seg, 2);
+
+  ptr = frag_more (8);
+  where = frag_now_fix () - 8;
+
+  /* Self relative offset of the function start.  */
+  fix_new (frag_now, where, 4, unwind->function_start, 0, 1,
+	   BFD_RELOC_C6000_PREL31);
+
+  /* Indicate dependency on ABI-defined personality routines to the
+     linker, if it hasn't been done already.  */
+  marked_pr_dependency
+    = seg_info (now_seg)->tc_segment_info_data.marked_pr_dependency;
+  if (unwind->personality_index >= 0 && unwind->personality_index < 5
+      && !(marked_pr_dependency & (1 << unwind->personality_index)))
+    {
+      static const char *const name[] =
+	{
+	  "__c6xabi_unwind_cpp_pr0",
+	  "__c6xabi_unwind_cpp_pr1",
+	  "__c6xabi_unwind_cpp_pr2",
+	  "__c6xabi_unwind_cpp_pr3",
+	  "__c6xabi_unwind_cpp_pr4"
+	};
+      symbolS *pr = symbol_find_or_make (name[unwind->personality_index]);
+      fix_new (frag_now, where, 0, pr, 0, 1, BFD_RELOC_NONE);
+      seg_info (now_seg)->tc_segment_info_data.marked_pr_dependency
+	|= 1 << unwind->personality_index;
+    }
+
+  if (unwind->table_entry)
+    {
+      /* Self relative offset of the table entry.	 */
+      fix_new (frag_now, where + 4, 4, unwind->table_entry, 0, 1,
+	       BFD_RELOC_C6000_PREL31);
+    }
+  else
+    {
+      /* Inline exception table entry.  */
+      md_number_to_chars (ptr + 4, unwind->data, 4);
+    }
+
+  /* Restore the original section.  */
+  subseg_set (old_seg, old_subseg);
+}
+
+static void
+tic6x_output_unwinding (bfd_boolean need_extab)
+{
+  tic6x_unwind_info *unwind = tic6x_get_unwind ();
+  unsigned safe_mask = unwind->safe_mask;
+  unsigned compact_mask = unwind->compact_mask;
+  unsigned reg_saved_mask = unwind->reg_saved_mask;
+  offsetT cfa_offset = unwind->cfa_offset;
+  long where;
+  int reg;
+
+  if (unwind->personality_index == -2)
+    {
+      /* Function can not be unwound.  */
+      unwind->data = 1;
+      tic6x_output_exidx_entry ();
+      return;
+    }
+
+  if (unwind->personality_index == -1 && unwind->personality_routine == NULL)
+    {
+      /* Auto-select a personality routine if none specified.  */
+      if (reg_saved_mask || cfa_offset >= MAX_COMPACT_SP_OFFSET)
+	unwind->personality_index = -1;
+      else if (safe_mask)
+	unwind->personality_index = 3;
+      else
+	unwind->personality_index = 4;
+    }
+
+  /* Calculate unwinding opcodes, and emit to EXTAB if necessary.  */
+  unwind->table_entry = NULL;
+  if (unwind->personality_index == 3 || unwind->personality_index == 4)
+    {
+      if (cfa_offset >= MAX_COMPACT_SP_OFFSET)
+	{
+	  as_bad (_("stack pointer offset too large for personality routine"));
+	  return;
+	}
+      if (reg_saved_mask
+	  || (unwind->personality_index == 3 && compact_mask != 0)
+	  || (unwind->personality_index == 4 && safe_mask != 0))
+	{
+	  as_bad (_("stack frame layout does not match personality routine"));
+	  return;
+	}
+
+      unwind->data = (1u << 31) | (unwind->personality_index << 24);
+      if (unwind->cfa_reg == 15)
+	unwind->data |= 0x7f << 17;
+      else
+	unwind->data |= cfa_offset << (17 - 3);
+
+      if (unwind->personality_index == 3)
+	unwind->data |= safe_mask << 4;
+      else
+	unwind->data |= compact_mask << 4;
+      unwind->data |= unwind->return_reg;
+      unwind->data_bytes = 4;
+    }
+  else
+    {
+      if (unwind->personality_routine)
+	{
+	  unwind->data = 0;
+	  unwind->data_bytes = 5;
+	  tic6x_flush_unwind_word (0);
+	  /* First word is personality routine.  */
+	  where = frag_now_fix () - 4;
+	  fix_new (frag_now, where, 4, unwind->personality_routine, 0, 1,
+		   BFD_RELOC_C6000_PREL31);
+	}
+      else if (unwind->personality_index > 0)
+	{
+	  unwind->data = 0x8000 | (unwind->personality_index << 8);
+	  unwind->data_bytes = 2;
+	}
+      else /* pr0 or undecided */
+	{
+	  unwind->data = 0x80;
+	  unwind->data_bytes = 1;
+	}
+
+      if (unwind->return_reg != UNWIND_B3)
+	{
+	  tic6x_unwind_byte (UNWIND_OP_RET | unwind->return_reg);
+	}
+
+      if (unwind->cfa_reg == 15)
+	{
+	  tic6x_unwind_byte (UNWIND_OP_MV_FP);
+	}
+      else if (cfa_offset != 0)
+	{
+	  cfa_offset >>= 3;
+	  if (cfa_offset > 0x80)
+	    {
+	      tic6x_unwind_byte (UNWIND_OP_ADD_SP2);
+	      tic6x_unwind_uleb (cfa_offset - 0x81);
+	    }
+	  else if (cfa_offset > 0x40)
+	    {
+	      tic6x_unwind_byte (UNWIND_OP_ADD_SP | 0x3f);
+	      tic6x_unwind_byte (UNWIND_OP_ADD_SP | (cfa_offset - 0x40));
+	    }
+	  else
+	    {
+	      tic6x_unwind_byte (UNWIND_OP_ADD_SP | (cfa_offset - 1));
+	    }
+	}
+
+      if (safe_mask)
+	tic6x_unwind_2byte (UNWIND_OP2_POP | unwind->safe_mask);
+      else if (unwind->pop_rts)
+	tic6x_unwind_byte (UNWIND_OP_POP_RTS);
+      else if (compact_mask)
+	tic6x_unwind_2byte (UNWIND_OP2_POP_COMPACT | unwind->compact_mask);
+      else if (reg_saved_mask)
+	{
+	  offsetT cur_offset;
+	  int val;
+	  int last_val;
+
+	  tic6x_unwind_byte (UNWIND_OP_POP_REG | unwind->saved_reg_count);
+	  last_val = 0;
+	  for (cur_offset = 0; unwind->saved_reg_count > 0; cur_offset -= 4)
+	    {
+	      val = 0xf;
+	      for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++)
+		{
+		  if (!unwind->reg_saved[reg])
+		    continue;
+
+		  if (unwind->reg_offset[reg] == cur_offset)
+		    {
+		      unwind->saved_reg_count--;
+		      val = reg;
+		      break;
+		    }
+		}
+	      if ((cur_offset & 4) == 4)
+		tic6x_unwind_byte ((last_val << 4) | val);
+	      else
+		last_val = val;
+	    }
+	  if ((cur_offset & 4) == 4)
+	    tic6x_unwind_byte ((last_val << 4) | 0xf);
+	}
+
+      /* Pad with RETURN opcodes.  */
+      while ((unwind->data_bytes & 3) != 0)
+	tic6x_unwind_byte (UNWIND_OP_RET | UNWIND_B3);
+
+      if (unwind->personality_index == -1 && unwind->personality_routine == NULL)
+	unwind->personality_index = 0;
+    }
+
+  /* Force creation of an EXTAB entry if an LSDA is required.  */
+  if (need_extab && !unwind->table_entry)
+    {
+      if (unwind->data_bytes != 4)
+	abort ();
+
+      tic6x_flush_unwind_word (unwind->data);
+    }
+  else if (unwind->table_entry && !need_extab)
+    {
+      /* Add an empty descriptor if there is no user-specified data.   */
+      char *ptr = frag_more (4);
+      md_number_to_chars (ptr, 0, 4);
+    }
+
+  /* Fill in length of unwinding bytecode.  */
+  if (unwind->table_entry)
+    {
+      valueT tmp;
+      if (unwind->data_bytes > 0x400)
+	as_bad (_("too many unwinding instructions"));
+
+      if (unwind->personality_index == -1)
+	{
+	  tmp = md_chars_to_number (unwind->frag_start + 4, 4);
+	  tmp |= ((unwind->data_bytes - 8) >> 2) << 24;
+	  md_number_to_chars (unwind->frag_start + 4, tmp, 4);
+	}
+      else if (unwind->personality_index == 1 || unwind->personality_index == 2)
+	{
+	  tmp = md_chars_to_number (unwind->frag_start, 4);
+	  tmp |= ((unwind->data_bytes - 4) >> 2) << 16;
+	  md_number_to_chars (unwind->frag_start, tmp, 4);
+	}
+    }
+  tic6x_output_exidx_entry ();
+}
+
+/* FIXME: This will get horribly confused if cfi directives are emitted for
+   function epilogue.  */
+void
+tic6x_cfi_endproc (struct fde_entry *fde)
+{
+  tic6x_unwind_info *unwind = tic6x_get_unwind ();
+  struct cfi_insn_data *insn;
+  int reg;
+  unsigned safe_mask = 0;
+  unsigned compact_mask = 0;
+  unsigned reg_saved_mask = 0;
+  offsetT cfa_offset = 0;
+  offsetT save_offset = 0;
+
+  unwind->cfa_reg = 31;
+  unwind->return_reg = UNWIND_B3;
+  unwind->saved_reg_count = 0;
+  unwind->pop_rts = FALSE;
+
+  unwind->saved_seg = now_seg;
+  unwind->saved_subseg = now_subseg;
+
+  for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++)
+    unwind->reg_saved[reg] = FALSE;
+
+  /* Scan FDE instructions to build up stack frame layout.  */
+  for (insn = fde->data; insn; insn = insn->next)
+    {
+      switch (insn->insn)
+	{
+	case DW_CFA_advance_loc:
+	  break;
+
+	case DW_CFA_def_cfa:
+	  unwind->cfa_reg = insn->u.ri.reg;
+	  cfa_offset = insn->u.ri.offset;
+	  break;
+
+	case DW_CFA_def_cfa_register:
+	  unwind->cfa_reg = insn->u.r;
+	  break;
+
+	case DW_CFA_def_cfa_offset:
+	  cfa_offset = insn->u.i;
+	  break;
+
+	case DW_CFA_undefined:
+	case DW_CFA_same_value:
+	  reg = tic6x_unwind_reg_from_dwarf (insn->u.r);
+	  if (reg >= 0)
+	    unwind->reg_saved[reg] = FALSE;
+	  break;
+
+	case DW_CFA_offset:
+	  reg = tic6x_unwind_reg_from_dwarf (insn->u.ri.reg);
+	  if (reg < 0)
+	    {
+	      as_bad (_("unable to generate unwinding opcode for reg %d"),
+		      insn->u.ri.reg);
+	      return;
+	    }
+	  unwind->reg_saved[reg] = TRUE;
+	  unwind->reg_offset[reg] = insn->u.ri.offset;
+	  if (insn->u.ri.reg == UNWIND_B3)
+	    unwind->return_reg = UNWIND_B3;
+	  break;
+
+	case DW_CFA_register:
+	  if (insn->u.rr.reg1 != 19)
+	    {
+	      as_bad (_("unable to generate unwinding opcode for reg %d"),
+		      insn->u.rr.reg1);
+	      return;
+	    }
+
+	  reg = tic6x_unwind_reg_from_dwarf (insn->u.rr.reg2);
+	  if (reg < 0)
+	    {
+	      as_bad (_("unable to generate unwinding opcode for reg %d"),
+		      insn->u.rr.reg2);
+	      return;
+	    }
+
+	  unwind->return_reg = reg;
+	  unwind->reg_saved[UNWIND_B3] = FALSE;
+	  if (unwind->reg_saved[reg])
+	    {
+	      as_bad (_("unable to restore return address from "
+			"previously restored reg"));
+	      return;
+	    }
+	  break;
+
+	case DW_CFA_restore:
+	case DW_CFA_remember_state:
+	case DW_CFA_restore_state:
+	case DW_CFA_GNU_window_save:
+	case CFI_escape:
+	case CFI_val_encoded_addr:
+	  as_bad (_("unhandled CFA insn for unwinding (%d)"), insn->insn);
+	  break;
+
+	default:
+	  abort ();
+	}
+    }
+
+  if (unwind->cfa_reg != 15 && unwind->cfa_reg != 31)
+    {
+      as_bad (_("unable to generate unwinding opcode for frame pointer reg %d"),
+	      unwind->cfa_reg);
+      return;
+    }
+
+  if (unwind->cfa_reg == 15)
+    {
+      if (cfa_offset != 0)
+	{
+	  as_bad (_("unable to generate unwinding opcode for "
+		    "frame pointer offset"));
+	  return;
+	}
+    }
+  else
+    {
+      if ((cfa_offset & 7) != 0)
+	{
+	  as_bad (_("unwound stack pointer not doubleword aligned"));
+	  return;
+	}
+    }
+
+  for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++)
+    {
+      if (unwind->reg_saved[reg])
+	reg_saved_mask |= 1 << (TIC6X_NUM_UNWIND_REGS - (reg + 1));
+    }
+
+  /* Check for standard "safe debug" frame layout */
+  if (reg_saved_mask)
+    {
+      save_offset = 0;
+      for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++)
+	{
+	  if (!unwind->reg_saved[reg])
+	    continue;
+
+	  if (target_big_endian
+	      && reg < TIC6X_NUM_UNWIND_REGS - 1
+	      && unwind->reg_saved[reg + 1]
+	      && tic6x_unwind_frame_regs[reg]
+		  == tic6x_unwind_frame_regs[reg + 1] + 1
+	      && (tic6x_unwind_frame_regs[reg] & 1) == 1
+	      && (save_offset & 4) == 4)
+	    {
+	      /* Swapped pair */
+	      if (save_offset != unwind->reg_offset[reg + 1]
+		  || save_offset - 4 != unwind->reg_offset[reg])
+		break;
+	      save_offset -= 8;
+	      reg++;
+	    }
+	  else
+	    {
+	      if (save_offset != unwind->reg_offset[reg])
+		break;
+	      save_offset -= 4;
+	    }
+	}
+      if (reg == TIC6X_NUM_UNWIND_REGS)
+	{
+	  safe_mask = reg_saved_mask;
+	  reg_saved_mask = 0;
+	}
+    }
+
+  /* Check for compact frame layout.  */
+  if (reg_saved_mask)
+    {
+      save_offset = 0;
+      for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++)
+	{
+	  int reg2;
+
+	  if (!unwind->reg_saved[reg])
+	    continue;
+
+	  if (reg < TIC6X_NUM_UNWIND_REGS - 1)
+	    {
+	      reg2 = reg + 1;
+
+	      if (!unwind->reg_saved[reg2]
+		  || tic6x_unwind_frame_regs[reg]
+		      != tic6x_unwind_frame_regs[reg2] + 1
+		  || (tic6x_unwind_frame_regs[reg2] & 1) != 0
+		  || save_offset == 0)
+		reg2 = -1;
+	    }
+	  else
+	    reg2 = -1;
+
+	  if (reg2 >= 0)
+	    {
+	      int high_offset;
+	      if (target_big_endian)
+		high_offset = 4; /* lower address = positive stack offset.  */
+	      else
+		high_offset = 0;
+
+	      if (save_offset + 4 - high_offset != unwind->reg_offset[reg]
+		  || save_offset + high_offset != unwind->reg_offset[reg2])
+		{
+		  break;
+		}
+	      reg++;
+	    }
+	  else
+	    {
+	      if (save_offset != unwind->reg_offset[reg])
+		break;
+	    }
+	  save_offset -= 8;
+	}
+
+      if (reg == TIC6X_NUM_UNWIND_REGS)
+	{
+	  compact_mask = reg_saved_mask;
+	  reg_saved_mask = 0;
+	}
+    }
+
+  /* Check for __c6xabi_pop_rts format */
+  if (reg_saved_mask == 0x17ff)
+    {
+      const int *pop_rts_offset = target_big_endian
+				? tic6x_pop_rts_offset_big
+			       	: tic6x_pop_rts_offset_little;
+
+      save_offset = 0;
+      for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++)
+	{
+	  if (reg == UNWIND_B15)
+	    continue;
+
+	  if (unwind->reg_offset[reg] != pop_rts_offset[reg] * 4)
+	    break;
+	}
+
+      if (reg == TIC6X_NUM_UNWIND_REGS)
+	{
+	  unwind->pop_rts = TRUE;
+	  reg_saved_mask = 0;
+	}
+    }
+  /* If all else fails then describe the frame manually.  */
+  if (reg_saved_mask)
+    {
+      save_offset = 0;
+
+      for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++)
+	{
+	  if (!unwind->reg_saved[reg])
+	    continue;
+
+	  unwind->saved_reg_count++;
+	  /* Encoding uses 4 bits per word, so size of unwinding opcode data 
+	     limits the save area size.  The exact cap will be figured out
+	     later due to overflow, the 0x800 here is just a quick sanity
+	     check to weed out obviously excessive offsets.  */
+	  if (unwind->reg_offset[reg] > 0 || unwind->reg_offset[reg] < -0x800
+	      || (unwind->reg_offset[reg] & 3) != 0)
+	    {
+	      as_bad (_("stack frame layout too complex for unwinder"));
+	      return;
+	    }
+
+	  if (unwind->reg_offset[reg] < save_offset)
+	    save_offset = unwind->reg_offset[reg] - 4;
+	}
+    }
+
+  /* Align to 8-byte boundary (stack grows towards negative offsets).  */
+  save_offset &= ~7;
+
+  if (unwind->cfa_reg == 31 && !reg_saved_mask)
+    {
+      cfa_offset += save_offset;
+      if (cfa_offset < 0)
+	{
+	  as_bad (_("unwound frame has negative size"));
+	  return;
+	}
+    }
+
+  unwind->safe_mask = safe_mask;
+  unwind->compact_mask = compact_mask;
+  unwind->reg_saved_mask = reg_saved_mask;
+  unwind->cfa_offset = cfa_offset;
+  unwind->function_start = fde->start_address;
+}
diff --git a/gas/config/tc-tic6x.h b/gas/config/tc-tic6x.h
index a324c0273d7..ca859689629 100644
--- a/gas/config/tc-tic6x.h
+++ b/gas/config/tc-tic6x.h
@@ -43,6 +43,38 @@ typedef struct tic6x_label_list
   symbolS *label;
 } tic6x_label_list;
 
+/* Must be consistent with the enum in tc-tic6x.c.  */
+#define TIC6X_NUM_UNWIND_REGS 13
+
+/* Unwinding information state.  */
+typedef struct tic6x_unwind_info {
+    int personality_index;
+    symbolS *personality_routine;
+    symbolS *function_start;
+    segT saved_seg;
+    subsegT saved_subseg;
+    /* NULL if table entry is inline.  */
+    symbolS *table_entry;
+    char *frag_start;
+    valueT data;
+    /* 0 before .cfi_startproc
+      -1 between .cfi_startproc and .handlerdata
+      >0 between .handlerdata and .endp */
+    int data_bytes;
+
+    offsetT reg_offset[TIC6X_NUM_UNWIND_REGS];
+    bfd_boolean reg_saved[TIC6X_NUM_UNWIND_REGS];
+    int cfa_reg;
+    int return_reg;
+    unsigned safe_mask;
+    unsigned compact_mask;
+    unsigned reg_saved_mask;
+    offsetT cfa_offset;
+    bfd_boolean pop_rts;
+    /* Only valid for UNWIND_OP_POP_REG */
+    int saved_reg_count;
+} tic6x_unwind_info;
+
 typedef struct
 {
   /* Any labels seen since the last instruction or data.  If not NULL,
@@ -77,6 +109,14 @@ typedef struct
      from the SPLOOP instruction (in the range 1 to 14); otherwise
      0.  */
   int sploop_ii;
+
+  /* Bit N indicates that an R_C6000_NONE relocation has been output for
+     __c6xabi_unwind_cpp_prN already if set. This enables dependencies to be
+     emitted only once per section, to save unnecessary bloat.  */
+  unsigned int marked_pr_dependency;
+
+  tic6x_unwind_info *unwind;
+  tic6x_unwind_info *text_unwind;
 } tic6x_segment_info_type;
 #define TC_SEGMENT_INFO_TYPE tic6x_segment_info_type
 
@@ -158,3 +198,28 @@ extern void tic6x_init_after_args (void);
 
 #define tc_unrecognized_line(c) tic6x_unrecognized_line (c)
 extern int tic6x_unrecognized_line (int c);
+
+/* We want .cfi_* pseudo-ops for generating unwind info.  */
+#define TARGET_USE_CFIPOP              1
+
+/* CFI hooks.  */
+#define tc_regname_to_dw2regnum            tic6x_regname_to_dw2regnum
+int tic6x_regname_to_dw2regnum (char *regname);
+
+#define tc_cfi_frame_initial_instructions  tic6x_frame_initial_instructions
+void tic6x_frame_initial_instructions (void);
+
+/* The return register is B3.  */
+#define DWARF2_DEFAULT_RETURN_COLUMN  (16 + 3)
+
+/* Registers are generally saved at negative offsets to the CFA.  */
+#define DWARF2_CIE_DATA_ALIGNMENT     (-4)
+
+#define tc_cfi_startproc tic6x_cfi_startproc
+void tic6x_cfi_startproc (void);
+
+#define tc_cfi_endproc tic6x_cfi_endproc
+struct fde_entry;
+void tic6x_cfi_endproc (struct fde_entry *fde);
+
+#define tc_cfi_section_name ".c6xabi.exidx"
diff --git a/gas/doc/c-tic6x.texi b/gas/doc/c-tic6x.texi
index b1e04f9a7a1..bc69160c9da 100644
--- a/gas/doc/c-tic6x.texi
+++ b/gas/doc/c-tic6x.texi
@@ -131,6 +131,14 @@ subsequent directive overriding it.
 @item .arch @var{arch}
 This has the same effect as @option{-march=@var{arch}}.
 
+@cindex @code{.cantunwind} directive, TIC6X
+@item .cantunwind
+Prevents unwinding through the current function.  No personality routine
+or exception table data is required or permitted.
+
+If this is not specified then frame unwinding information will be
+constructed from CFI directives. @pxref{CFI directives}.
+
 @cindex @code{.c6xabi_attribute} directive, TIC6X
 @item .c6xabi_attribute @var{tag}, @var{value}
 Set the C6000 EABI build attribute @var{tag} to @var{value}.
@@ -150,11 +158,35 @@ The @var{tag} is either an attribute number or one of
 @item .ehtype @var{symbol}
 Output an exception type table reference to @var{symbol}.
 
+@cindex @code{.endp} directive, TIC6X
+@item .endp
+Marks the end of and exception table or function.  If preceeded by a
+@code{.handlerdata} directive then this also switched back to the previous
+text section.
+
+@cindex @code{.handlerdata} directive, TIC6X
+@item .handlerdata
+Marks the end of the current function, and the start of the exception table
+entry for that function.  Anything between this directive and the
+@code{.endp} directive will be added to the exception table entry.
+
+Must be preceded by a CFI block containing a @code{.cfi_lsda} directive.
+directive.
+
 @cindex @code{.nocmp} directive, TIC6X
 @item .nocmp
 Disallow use of C64x+ compact instructions in the current text
 section.
 
+@cindex @code{.personalityindex} directive, TIC6X
+@item .personalityindex @var{index}
+Sets the personality routine for the current function to the ABI specified 
+compact routine number @var{index}
+
+@cindex @code{.personality} directive, TIC6X
+@item .personality @var{name}
+Sets the personality routine for the current function to @var{name}.
+
 @cindex @code{.scomm} directive, TIC6X
 @item .scomm @var{symbol}, @var{size}, @var{align}
 Like @code{.comm}, creating a common symbol @var{symbol} with size @var{size}
diff --git a/gas/dw2gencfi.c b/gas/dw2gencfi.c
index 705157bff1f..c35240bb355 100644
--- a/gas/dw2gencfi.c
+++ b/gas/dw2gencfi.c
@@ -68,6 +68,14 @@
 #define tc_cfi_frame_initial_instructions() ((void)0)
 #endif
 
+#ifndef tc_cfi_startproc
+# define tc_cfi_startproc() ((void)0)
+#endif
+
+#ifndef tc_cfi_endproc
+# define tc_cfi_endproc(fde) ((void)0)
+#endif
+
 #ifndef DWARF2_FORMAT
 #define DWARF2_FORMAT(SEC) dwarf2_format_32bit
 #endif
@@ -76,12 +84,6 @@
 #define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8)
 #endif
 
-#if defined (TE_PE) || defined (TE_PEP)
-#define SUPPORT_FRAME_LINKONCE 1
-#else
-#define SUPPORT_FRAME_LINKONCE 0
-#endif
-
 #if SUPPORT_FRAME_LINKONCE
 #define CUR_SEG(structp) structp->cur_seg
 #define SET_CUR_SEG(structp, seg) structp->cur_seg = seg 
@@ -268,67 +270,6 @@ struct cfi_escape_data
   expressionS exp;
 };
 
-struct cfi_insn_data
-{
-  struct cfi_insn_data *next;
-#if SUPPORT_FRAME_LINKONCE
-  segT cur_seg;
-#endif
-  int insn;
-  union
-  {
-    struct
-    {
-      unsigned reg;
-      offsetT offset;
-    } ri;
-
-    struct
-    {
-      unsigned reg1;
-      unsigned reg2;
-    } rr;
-
-    unsigned r;
-    offsetT i;
-
-    struct
-    {
-      symbolS *lab1;
-      symbolS *lab2;
-    } ll;
-
-    struct cfi_escape_data *esc;
-
-    struct
-    {
-      unsigned reg, encoding;
-      expressionS exp;
-    } ea;
-  } u;
-};
-
-struct fde_entry
-{
-  struct fde_entry *next;
-#if SUPPORT_FRAME_LINKONCE
-  segT cur_seg;
-#endif
-  symbolS *start_address;
-  symbolS *end_address;
-  struct cfi_insn_data *data;
-  struct cfi_insn_data **last;
-  unsigned char per_encoding;
-  unsigned char lsda_encoding;
-  expressionS personality;
-  expressionS lsda;
-  unsigned int return_column;
-  unsigned int signal_frame;
-#if SUPPORT_FRAME_LINKONCE
-  int handled;
-#endif
-};
-
 struct cie_entry
 {
   struct cie_entry *next;
@@ -611,14 +552,6 @@ static void dot_cfi_personality (int);
 static void dot_cfi_lsda (int);
 static void dot_cfi_val_encoded_addr (int);
 
-/* Fake CFI type; outside the byte range of any real CFI insn.  */
-#define CFI_adjust_cfa_offset	0x100
-#define CFI_return_column	0x101
-#define CFI_rel_offset		0x102
-#define CFI_escape		0x103
-#define CFI_signal_frame	0x104
-#define CFI_val_encoded_addr	0x105
-
 const pseudo_typeS cfi_pseudo_table[] =
   {
     { "cfi_sections", dot_cfi_sections, 0 },
@@ -1087,6 +1020,7 @@ dot_cfi_val_encoded_addr (int ignored ATTRIBUTE_UNUSED)
 /* By default emit .eh_frame only, not .debug_frame.  */
 #define CFI_EMIT_eh_frame	(1 << 0)
 #define CFI_EMIT_debug_frame	(1 << 1)
+#define CFI_EMIT_target		(1 << 2)
 static int cfi_sections = CFI_EMIT_eh_frame;
 
 static void
@@ -1108,6 +1042,10 @@ dot_cfi_sections (int ignored ATTRIBUTE_UNUSED)
 	  sections |= CFI_EMIT_eh_frame;
 	else if (strncmp (name, ".debug_frame", sizeof ".debug_frame") == 0)
 	  sections |= CFI_EMIT_debug_frame;
+#ifdef tc_cfi_section_name
+	else if (strcmp (name, tc_cfi_section_name) == 0)
+	  sections |= CFI_EMIT_target;
+#endif
 	else
 	  {
 	    *input_line_pointer = c;
@@ -1170,11 +1108,16 @@ dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED)
   frchain_now->frch_cfi_data->cur_cfa_offset = 0;
   if (!simple)
     tc_cfi_frame_initial_instructions ();
+
+  if ((cfi_sections & CFI_EMIT_target) != 0)
+    tc_cfi_startproc ();
 }
 
 static void
 dot_cfi_endproc (int ignored ATTRIBUTE_UNUSED)
 {
+  struct fde_entry *fde;
+
   if (frchain_now->frch_cfi_data == NULL)
     {
       as_bad (_(".cfi_endproc without corresponding .cfi_startproc"));
@@ -1182,9 +1125,14 @@ dot_cfi_endproc (int ignored ATTRIBUTE_UNUSED)
       return;
     }
 
+  fde = frchain_now->frch_cfi_data->cur_fde_data;
+
   cfi_end_fde (symbol_temp_new_now ());
 
   demand_empty_rest_of_line ();
+
+  if ((cfi_sections & CFI_EMIT_target) != 0)
+    tc_cfi_endproc (fde);
 }
 
 
diff --git a/gas/dw2gencfi.h b/gas/dw2gencfi.h
index f8f235d8e54..0226cdd388e 100644
--- a/gas/dw2gencfi.h
+++ b/gas/dw2gencfi.h
@@ -49,4 +49,81 @@ extern void cfi_add_CFA_same_value (unsigned);
 extern void cfi_add_CFA_remember_state (void);
 extern void cfi_add_CFA_restore_state (void);
 
+/* Structures for md_cfi_end.  */
+
+#if defined (TE_PE) || defined (TE_PEP)
+#define SUPPORT_FRAME_LINKONCE 1
+#else
+#define SUPPORT_FRAME_LINKONCE 0
+#endif
+
+struct cfi_insn_data
+{
+  struct cfi_insn_data *next;
+#if SUPPORT_FRAME_LINKONCE
+  segT cur_seg;
+#endif
+  int insn;
+  union
+  {
+    struct
+    {
+      unsigned reg;
+      offsetT offset;
+    } ri;
+
+    struct
+    {
+      unsigned reg1;
+      unsigned reg2;
+    } rr;
+
+    unsigned r;
+    offsetT i;
+
+    struct
+    {
+      symbolS *lab1;
+      symbolS *lab2;
+    } ll;
+
+    struct cfi_escape_data *esc;
+
+    struct
+    {
+      unsigned reg, encoding;
+      expressionS exp;
+    } ea;
+  } u;
+};
+
+struct fde_entry
+{
+  struct fde_entry *next;
+#if SUPPORT_FRAME_LINKONCE
+  segT cur_seg;
+#endif
+  symbolS *start_address;
+  symbolS *end_address;
+  struct cfi_insn_data *data;
+  struct cfi_insn_data **last;
+  unsigned char per_encoding;
+  unsigned char lsda_encoding;
+  expressionS personality;
+  expressionS lsda;
+  unsigned int return_column;
+  unsigned int signal_frame;
+#if SUPPORT_FRAME_LINKONCE
+  int handled;
+#endif
+};
+
+/* Fake CFI type; outside the byte range of any real CFI insn.  */
+#define CFI_adjust_cfa_offset	0x100
+#define CFI_return_column	0x101
+#define CFI_rel_offset		0x102
+#define CFI_escape		0x103
+#define CFI_signal_frame	0x104
+#define CFI_val_encoded_addr	0x105
+
 #endif /* DW2GENCFI_H */
diff --git a/gas/testsuite/ChangeLog b/gas/testsuite/ChangeLog
index 25618f86b41..d5790a1352d 100644
--- a/gas/testsuite/ChangeLog
+++ b/gas/testsuite/ChangeLog
@@ -1,3 +1,18 @@
+2011-05-09  Paul Brook  <paul@codesourcery.com>
+
+	* gas/tic6x/unwind-1.d: New test.
+	* gas/tic6x/unwind-1.s: New test.
+	* gas/tic6x/unwind-2.d: New test.
+	* gas/tic6x/unwind-2.s: New test.
+	* gas/tic6x/unwind-3.d: New test.
+	* gas/tic6x/unwind-3.s: New test.
+	* gas/tic6x/unwind-bad-1.d: New test.
+	* gas/tic6x/unwind-bad-1.s: New test.
+	* gas/tic6x/unwind-bad-1.l: New test.
+	* gas/tic6x/unwind-bad-2.d: New test.
+	* gas/tic6x/unwind-bad-2.s: New test.
+	* gas/tic6x/unwind-bad-2.l: New test.
+
 2011-04-29  Hans-Peter Nilsson  <hp@axis.com>
 
 	* gas/elf/dwarf2-1.d, gas/elf/dwarf2-2.d: Adjust for change in
diff --git a/gas/testsuite/gas/tic6x/unwind-1.d b/gas/testsuite/gas/tic6x/unwind-1.d
new file mode 100644
index 00000000000..1b240f9df35
--- /dev/null
+++ b/gas/testsuite/gas/tic6x/unwind-1.d
@@ -0,0 +1,100 @@
+#readelf: -u
+#name: C6X unwinding directives 1 (little endian)
+#as: -mlittle-endian
+#source: unwind-1.s
+
+Unwind table index '.c6xabi.exidx' .*
+
+0x0: 0x83020227
+  Compact model 3
+  Stack increment 8
+  Registers restored: A11, B3
+  Return register: B3
+
+0x100: 0x808003e7
+  Compact model 0
+  0x80 0x03 pop {A10, A11}
+  0xe7      RETURN
+
+0x200: 0x81008863
+  Compact model 1
+  0x88 0x63 pop {A10, A11, B3, B10, B15}
+
+0x300: 0x83020227
+  Compact model 3
+  Stack increment 8
+  Registers restored: A11, B3
+  Return register: B3
+
+0x400: 0x84000227
+  Compact model 4
+  Stack increment 0
+  Registers restored:  \(compact\) A11, B3
+  Return register: B3
+
+0x500: 0x80a022e7
+  Compact model 0
+  0xa0 0x22 pop compact {A11, B3}
+  0xe7      RETURN
+
+0x600: 0x84000227
+  Compact model 4
+  Stack increment 0
+  Registers restored:  \(compact\) A11, B3
+  Return register: B3
+
+0x700: 0x84000637
+  Compact model 4
+  Stack increment 0
+  Registers restored:  \(compact\) A10, A11, B3, B10
+  Return register: B3
+
+0x800: 0x840002d7
+  Compact model 4
+  Stack increment 0
+  Registers restored:  \(compact\) A10, A12, A13, B3
+  Return register: B3
+
+0x900: 0x84000c07
+  Compact model 4
+  Stack increment 0
+  Registers restored:  \(compact\) B10, B11
+  Return register: B3
+
+0xa00: 0x83ff0027
+  Compact model 3
+  Restore stack from frame pointer
+  Registers restored: A11, A15
+  Return register: B3
+
+0xb00: 0x84ff0027
+  Compact model 4
+  Restore stack from frame pointer
+  Registers restored:  \(compact\) A11, A15
+  Return register: B3
+
+0xc00: 0x8001c1f7
+  Compact model 0
+  0x01      sp = sp \+ 16
+  0xc1 0xf7 pop frame {B3, \[pad\]}
+
+0xd00: @0x.*
+  Compact model 1
+  0x01      sp = sp \+ 16
+  0xc2 0xf7 0xbf pop frame {\[pad\], A11, B3, \[pad\]}
+  0xe7      RETURN
+  0xe7      RETURN
+
+0xe00: @0x.*
+  Compact model 1
+  0x01      sp = sp \+ 16
+  0xc2 0xf7 0xfb pop frame {A11, \[pad\], B3, \[pad\]}
+  0xe7      RETURN
+  0xe7      RETURN
+
+0xf00: @0x.*
+  Compact model 1
+  0x02      sp = sp \+ 24
+  0xc2 0x7f 0xff 0xfb pop frame {A11, \[pad\], \[pad\], \[pad\], \[pad\], B3}
+  0xe7      RETURN
+
diff --git a/gas/testsuite/gas/tic6x/unwind-1.s b/gas/testsuite/gas/tic6x/unwind-1.s
new file mode 100644
index 00000000000..3fbc88886e4
--- /dev/null
+++ b/gas/testsuite/gas/tic6x/unwind-1.s
@@ -0,0 +1,242 @@
+.cfi_sections .c6xabi.exidx
+
+# standard layout
+.p2align 8
+f0:
+.cfi_startproc
+stw .d2t2 B3, *B15--(16)
+.cfi_def_cfa_offset 16
+.cfi_offset 19, 0
+stw .d2t1 A11, *+B15(12)
+.cfi_offset 11, -4
+nop 4
+.cfi_endproc
+.endp
+
+# standard layout (pr0)
+.p2align 8
+f1:
+.cfi_startproc
+.cfi_def_cfa_offset 8
+stw .d2t1 A11, *+B15(8)
+.cfi_offset 11, -0
+stw .d2t1 A10, *+B15(4)
+.cfi_offset 10, -4
+nop 4
+.cfi_endproc
+.personalityindex 0
+.endp
+
+# standard layout (pr1)
+.p2align 8
+f2:
+.cfi_startproc
+stw .d2t2 B15, *B15--(24)
+.cfi_def_cfa_offset 24
+.cfi_offset 31, 0
+stw .d2t2 B10, *+B15(20)
+.cfi_offset 26, -4
+stw .d2t2 B3, *+B15(16)
+.cfi_offset 19, -8
+stdw .d2t1 A11:A10, *+B15(8)
+.cfi_offset 11, -12
+.cfi_offset 10, -16
+nop 4
+.cfi_endproc
+.personalityindex 1
+.endp
+
+# standard layout (pr3)
+.p2align 8
+f3:
+.cfi_startproc
+stw .d2t2 B3, *B15--(16)
+.cfi_def_cfa_offset 16
+.cfi_offset 19, 0
+stw .d2t1 A11, *+B15(12)
+.cfi_offset 11, -4
+nop 4
+.cfi_endproc
+.personalityindex 3
+.endp
+
+# compact layout
+.p2align 8
+f4:
+.cfi_startproc
+stw .d2t2 B3, *B15--(8)
+.cfi_offset 19, 0
+.cfi_def_cfa_offset 8
+stw .d2t1 A11, *B15--(8)
+.cfi_offset 11, -8
+.cfi_def_cfa_offset 16
+nop 4
+.cfi_endproc
+.endp
+
+# compact layout (pr0)
+.p2align 8
+f5:
+.cfi_startproc
+stw .d2t2 B3, *B15--(8)
+.cfi_offset 19, 0
+.cfi_def_cfa_offset 8
+stw .d2t1 A11, *B15--(8)
+.cfi_offset 11, -8
+.cfi_def_cfa_offset 16
+nop 4
+.cfi_endproc
+.personalityindex 0
+.endp
+
+# compact layout (pr4)
+.p2align 8
+f6:
+.cfi_startproc
+stw .d2t2 B3, *B15--(8)
+.cfi_offset 19, 0
+.cfi_def_cfa_offset 8
+stw .d2t1 A11, *B15--(8)
+.cfi_offset 11, -8
+.cfi_def_cfa_offset 16
+nop 4
+.cfi_endproc
+.personalityindex 4
+.endp
+
+# compact layout (aligned pair)
+.p2align 8
+f7:
+.cfi_startproc
+stw .d2t2 B10, *B15--(8)
+.cfi_offset 26, 0
+.cfi_def_cfa_offset 8
+stw .d2t2 B3, *B15--(8)
+.cfi_offset 19, -8
+.cfi_def_cfa_offset 8
+stdw .d2t1 A11:A10, *B15--(8)
+.cfi_offset 11, -12
+.cfi_offset 10, -16
+.cfi_def_cfa_offset 24
+nop 4
+.cfi_endproc
+.endp
+
+# compact layout (aligned pair + 1)
+.p2align 8
+f8:
+.cfi_startproc
+stw .d2t2 B3, *B15--(8)
+.cfi_offset 19, 0
+.cfi_def_cfa_offset 8
+stdw .d2t1 A13:A12, *B15--(8)
+.cfi_offset 13, -4
+.cfi_offset 12, -8
+.cfi_def_cfa_offset 16
+stw .d2t1 A10, *B15--(8)
+.cfi_offset 10, -16
+.cfi_def_cfa_offset 24
+nop 4
+.cfi_endproc
+.endp
+
+# compact layout (misaligned pair)
+.p2align 8
+f9:
+.cfi_startproc
+stw .d2t2 B11, *B15--(8)
+.cfi_offset 27, 0
+.cfi_def_cfa_offset 8
+stw .d2t2 B10, *B15--(8)
+.cfi_offset 26, -8
+.cfi_def_cfa_offset 16
+nop 4
+.cfi_endproc
+.endp
+
+# standard frame pointer
+.p2align 8
+fa:
+.cfi_startproc
+stw .d2t1 A15, *B15--(16)
+.cfi_def_cfa_offset 8
+.cfi_offset 15, 0
+mv .s1x B15, A15
+addk .s1 16, A15
+.cfi_def_cfa 15, 0
+stw .d2t1 A11, *+B15(12)
+.cfi_offset 11, -4
+nop 4
+.cfi_endproc
+.endp
+
+# compact frame pointer
+.p2align 8
+fb:
+.cfi_startproc
+stw .d2t1 A15, *B15--(8)
+.cfi_def_cfa_offset 8
+.cfi_offset 15, 0
+mv .s1x B15, A15
+addk .s1 16, A15
+.cfi_def_cfa 15, 0
+stw .d2t1 A11, *B15--(8)
+.cfi_offset 11, -8
+nop 4
+.cfi_endproc
+.endp
+
+# custom layout
+.p2align 8
+fc:
+.cfi_startproc
+sub .s2 B15, 16, B15
+stw .d2t2 B3, *+B15(12)
+.cfi_def_cfa_offset 16
+.cfi_offset 19, -4
+nop 4
+.cfi_endproc
+.endp
+
+# custom layout
+.p2align 8
+fd:
+.cfi_startproc
+sub .s2 B15, 16, B15
+stw .d2t2 B3, *+B15(12)
+.cfi_def_cfa_offset 16
+.cfi_offset 19, -4
+stw .d2t1 A11, *+B15(8)
+.cfi_offset 11, -8
+nop 4
+.cfi_endproc
+.endp
+
+# custom layout
+.p2align 8
+fe:
+.cfi_startproc
+sub .s2 B15, 16, B15
+stw .d2t2 B3, *+B15(12)
+.cfi_def_cfa_offset 16
+.cfi_offset 19, -4
+stw .d2t1 A11, *+B15(4)
+.cfi_offset 11, -12
+nop 4
+.cfi_endproc
+.endp
+
+# custom layout
+.p2align 8
+ff:
+.cfi_startproc
+addk .s2 -24, B15
+stw .d2t2 B3, *+B15(24)
+.cfi_def_cfa_offset 24
+.cfi_offset 19, 0
+stw .d2t1 A11, *+B15(4)
+.cfi_offset 11, -20
+nop 4
+.cfi_endproc
+.endp
+
diff --git a/gas/testsuite/gas/tic6x/unwind-2.d b/gas/testsuite/gas/tic6x/unwind-2.d
new file mode 100644
index 00000000000..c022ec4ebc0
--- /dev/null
+++ b/gas/testsuite/gas/tic6x/unwind-2.d
@@ -0,0 +1,100 @@
+#readelf: -u
+#name: C6X unwinding directives 2 (big endian)
+#as: -mbig-endian
+#source: unwind-2.s
+
+Unwind table index '.c6xabi.exidx' .*
+
+0x0: 0x83020227
+  Compact model 3
+  Stack increment 8
+  Registers restored: A11, B3
+  Return register: B3
+
+0x100: 0x808003e7
+  Compact model 0
+  0x80 0x03 pop {A10, A11}
+  0xe7      RETURN
+
+0x200: 0x81008863
+  Compact model 1
+  0x88 0x63 pop {A10, A11, B3, B10, B15}
+
+0x300: 0x83020227
+  Compact model 3
+  Stack increment 8
+  Registers restored: A11, B3
+  Return register: B3
+
+0x400: 0x84000227
+  Compact model 4
+  Stack increment 0
+  Registers restored:  \(compact\) A11, B3
+  Return register: B3
+
+0x500: 0x80a022e7
+  Compact model 0
+  0xa0 0x22 pop compact {A11, B3}
+  0xe7      RETURN
+
+0x600: 0x84000227
+  Compact model 4
+  Stack increment 0
+  Registers restored:  \(compact\) A11, B3
+  Return register: B3
+
+0x700: 0x84000637
+  Compact model 4
+  Stack increment 0
+  Registers restored:  \(compact\) A10, A11, B3, B10
+  Return register: B3
+
+0x800: 0x840002d7
+  Compact model 4
+  Stack increment 0
+  Registers restored:  \(compact\) A10, A12, A13, B3
+  Return register: B3
+
+0x900: 0x84000c07
+  Compact model 4
+  Stack increment 0
+  Registers restored:  \(compact\) B10, B11
+  Return register: B3
+
+0xa00: 0x83ff0027
+  Compact model 3
+  Restore stack from frame pointer
+  Registers restored: A11, A15
+  Return register: B3
+
+0xb00: 0x84ff0027
+  Compact model 4
+  Restore stack from frame pointer
+  Registers restored:  \(compact\) A11, A15
+  Return register: B3
+
+0xc00: 0x8001c1f7
+  Compact model 0
+  0x01      sp = sp \+ 16
+  0xc1 0xf7 pop frame {B3, \[pad\]}
+
+0xd00: @0x.*
+  Compact model 1
+  0x01      sp = sp \+ 16
+  0xc2 0xf7 0xbf pop frame {\[pad\], A11, B3, \[pad\]}
+  0xe7      RETURN
+  0xe7      RETURN
+
+0xe00: @0x.*
+  Compact model 1
+  0x01      sp = sp \+ 16
+  0xc2 0xf7 0xfb pop frame {A11, \[pad\], B3, \[pad\]}
+  0xe7      RETURN
+  0xe7      RETURN
+
+0xf00: @0x.*
+  Compact model 1
+  0x02      sp = sp \+ 24
+  0xc2 0x7f 0xff 0xfb pop frame {A11, \[pad\], \[pad\], \[pad\], \[pad\], B3}
+  0xe7      RETURN
+
diff --git a/gas/testsuite/gas/tic6x/unwind-2.s b/gas/testsuite/gas/tic6x/unwind-2.s
new file mode 100644
index 00000000000..1ab4d674b8d
--- /dev/null
+++ b/gas/testsuite/gas/tic6x/unwind-2.s
@@ -0,0 +1,242 @@
+.cfi_sections .c6xabi.exidx
+
+# standard layout
+.p2align 8
+f0:
+.cfi_startproc
+stw .d2t2 B3, *B15--(16)
+.cfi_def_cfa_offset 16
+.cfi_offset 19, 0
+stw .d2t1 A11, *+B15(12)
+.cfi_offset 11, -4
+nop 4
+.cfi_endproc
+.endp
+
+# standard layout (pr0)
+.p2align 8
+f1:
+.cfi_startproc
+.cfi_def_cfa_offset 8
+stw .d2t1 A11, *+B15(8)
+.cfi_offset 11, -0
+stw .d2t1 A10, *+B15(4)
+.cfi_offset 10, -4
+nop 4
+.cfi_endproc
+.personalityindex 0
+.endp
+
+# standard layout (pr1)
+.p2align 8
+f2:
+.cfi_startproc
+stw .d2t2 B15, *B15--(24)
+.cfi_def_cfa_offset 24
+.cfi_offset 31, 0
+stw .d2t2 B10, *+B15(20)
+.cfi_offset 26, -4
+stw .d2t2 B3, *+B15(16)
+.cfi_offset 19, -8
+stdw .d2t1 A11:A10, *+B15(8)
+.cfi_offset 11, -16
+.cfi_offset 10, -12
+nop 4
+.cfi_endproc
+.personalityindex 1
+.endp
+
+# standard layout (pr3)
+.p2align 8
+f3:
+.cfi_startproc
+stw .d2t2 B3, *B15--(16)
+.cfi_def_cfa_offset 16
+.cfi_offset 19, 0
+stw .d2t1 A11, *+B15(12)
+.cfi_offset 11, -4
+nop 4
+.cfi_endproc
+.personalityindex 3
+.endp
+
+# compact layout
+.p2align 8
+f4:
+.cfi_startproc
+stw .d2t2 B3, *B15--(8)
+.cfi_offset 19, 0
+.cfi_def_cfa_offset 8
+stw .d2t1 A11, *B15--(8)
+.cfi_offset 11, -8
+.cfi_def_cfa_offset 16
+nop 4
+.cfi_endproc
+.endp
+
+# compact layout (pr0)
+.p2align 8
+f5:
+.cfi_startproc
+stw .d2t2 B3, *B15--(8)
+.cfi_offset 19, 0
+.cfi_def_cfa_offset 8
+stw .d2t1 A11, *B15--(8)
+.cfi_offset 11, -8
+.cfi_def_cfa_offset 16
+nop 4
+.cfi_endproc
+.personalityindex 0
+.endp
+
+# compact layout (pr4)
+.p2align 8
+f6:
+.cfi_startproc
+stw .d2t2 B3, *B15--(8)
+.cfi_offset 19, 0
+.cfi_def_cfa_offset 8
+stw .d2t1 A11, *B15--(8)
+.cfi_offset 11, -8
+.cfi_def_cfa_offset 16
+nop 4
+.cfi_endproc
+.personalityindex 4
+.endp
+
+# compact layout (aligned pair)
+.p2align 8
+f7:
+.cfi_startproc
+stw .d2t2 B10, *B15--(8)
+.cfi_offset 26, 0
+.cfi_def_cfa_offset 8
+stw .d2t2 B3, *B15--(8)
+.cfi_offset 19, -8
+.cfi_def_cfa_offset 8
+stdw .d2t1 A11:A10, *B15--(8)
+.cfi_offset 11, -16
+.cfi_offset 10, -12
+.cfi_def_cfa_offset 24
+nop 4
+.cfi_endproc
+.endp
+
+# compact layout (aligned pair + 1)
+.p2align 8
+f8:
+.cfi_startproc
+stw .d2t2 B3, *B15--(8)
+.cfi_offset 19, 0
+.cfi_def_cfa_offset 8
+stdw .d2t1 A13:A12, *B15--(8)
+.cfi_offset 13, -8
+.cfi_offset 12, -4
+.cfi_def_cfa_offset 16
+stw .d2t1 A10, *B15--(8)
+.cfi_offset 10, -16
+.cfi_def_cfa_offset 24
+nop 4
+.cfi_endproc
+.endp
+
+# compact layout (misaligned pair)
+.p2align 8
+f9:
+.cfi_startproc
+stw .d2t2 B11, *B15--(8)
+.cfi_offset 27, 0
+.cfi_def_cfa_offset 8
+stw .d2t2 B10, *B15--(8)
+.cfi_offset 26, -8
+.cfi_def_cfa_offset 16
+nop 4
+.cfi_endproc
+.endp
+
+# standard frame pointer
+.p2align 8
+fa:
+.cfi_startproc
+stw .d2t1 A15, *B15--(16)
+.cfi_def_cfa_offset 8
+.cfi_offset 15, 0
+mv .s1x B15, A15
+addk .s1 16, A15
+.cfi_def_cfa 15, 0
+stw .d2t1 A11, *+B15(12)
+.cfi_offset 11, -4
+nop 4
+.cfi_endproc
+.endp
+
+# compact frame pointer
+.p2align 8
+fb:
+.cfi_startproc
+stw .d2t1 A15, *B15--(8)
+.cfi_def_cfa_offset 8
+.cfi_offset 15, 0
+mv .s1x B15, A15
+addk .s1 16, A15
+.cfi_def_cfa 15, 0
+stw .d2t1 A11, *B15--(8)
+.cfi_offset 11, -8
+nop 4
+.cfi_endproc
+.endp
+
+# custom layout
+.p2align 8
+fc:
+.cfi_startproc
+sub .s2 B15, 16, B15
+stw .d2t2 B3, *+B15(12)
+.cfi_def_cfa_offset 16
+.cfi_offset 19, -4
+nop 4
+.cfi_endproc
+.endp
+
+# custom layout
+.p2align 8
+fd:
+.cfi_startproc
+sub .s2 B15, 16, B15
+stw .d2t2 B3, *+B15(12)
+.cfi_def_cfa_offset 16
+.cfi_offset 19, -4
+stw .d2t1 A11, *+B15(8)
+.cfi_offset 11, -8
+nop 4
+.cfi_endproc
+.endp
+
+# custom layout
+.p2align 8
+fe:
+.cfi_startproc
+sub .s2 B15, 16, B15
+stw .d2t2 B3, *+B15(12)
+.cfi_def_cfa_offset 16
+.cfi_offset 19, -4
+stw .d2t1 A11, *+B15(4)
+.cfi_offset 11, -12
+nop 4
+.cfi_endproc
+.endp
+
+# custom layout
+.p2align 8
+ff:
+.cfi_startproc
+addk .s2 -24, B15
+stw .d2t2 B3, *+B15(24)
+.cfi_def_cfa_offset 24
+.cfi_offset 19, 0
+stw .d2t1 A11, *+B15(4)
+.cfi_offset 11, -20
+nop 4
+.cfi_endproc
+.endp
+
diff --git a/gas/testsuite/gas/tic6x/unwind-3.d b/gas/testsuite/gas/tic6x/unwind-3.d
new file mode 100644
index 00000000000..d03243db3fd
--- /dev/null
+++ b/gas/testsuite/gas/tic6x/unwind-3.d
@@ -0,0 +1,18 @@
+#readelf: -u
+#name: C6X unwinding directives 3 (segment change)
+#source: unwind-3.s
+
+Unwind table index '.c6xabi.exidx.text.bar' .*
+
+0x0: 0x830e2807
+  Compact model 3
+  Stack increment 56
+  Registers restored: B11, B13
+  Return register: B3
+
+Unwind table index '.c6xabi.exidx' .*
+
+0x0: 0x80008021
+  Compact model 0
+  0x00      sp = sp \+ 8
+  0x80 0x21 pop {A10, B3}
diff --git a/gas/testsuite/gas/tic6x/unwind-3.s b/gas/testsuite/gas/tic6x/unwind-3.s
new file mode 100644
index 00000000000..0239e23bc42
--- /dev/null
+++ b/gas/testsuite/gas/tic6x/unwind-3.s
@@ -0,0 +1,33 @@
+.cfi_sections .c6xabi.exidx
+
+.text
+# standard layout
+.p2align 8
+foo:
+.cfi_startproc
+.personalityindex 0
+stw .d2t2 B3, *B15--(16)
+.cfi_def_cfa_offset 16
+.cfi_offset B3, 0
+
+
+.section .text.bar, "ax"
+
+bar:
+.cfi_startproc
+stw .d2t2 B13, *B15--(16)
+.cfi_def_cfa_offset 64
+.cfi_offset B13, 0
+stw .d2t2 B13, *+B15(12)
+.cfi_offset B11, -4
+nop 4
+.cfi_endproc
+.endp
+
+.text
+
+stw .d2t1 A10, *+B15(12)
+.cfi_offset A10, -4
+nop 4
+.cfi_endproc
+.endp
diff --git a/gas/testsuite/gas/tic6x/unwind-bad-1.d b/gas/testsuite/gas/tic6x/unwind-bad-1.d
new file mode 100644
index 00000000000..077062d934f
--- /dev/null
+++ b/gas/testsuite/gas/tic6x/unwind-bad-1.d
@@ -0,0 +1,3 @@
+#name: C6X unwinding directive errors
+#error-output: unwind-bad-1.l
+
diff --git a/gas/testsuite/gas/tic6x/unwind-bad-1.l b/gas/testsuite/gas/tic6x/unwind-bad-1.l
new file mode 100644
index 00000000000..523dac183ce
--- /dev/null
+++ b/gas/testsuite/gas/tic6x/unwind-bad-1.l
@@ -0,0 +1,12 @@
+[^:]*: Assembler messages:
+[^:]*:4: Error: unexpected \.handlerdata directive
+[^:]*:9: Error: duplicate \.personalityindex directive
+[^:]*:11: Error: personality routine specified for cantunwind frame
+[^:]*:19: Error: personality routine specified for cantunwind frame
+[^:]*:29: Error: duplicate \.personality directive
+[^:]*:32: Error: unexpected \.cantunwind directive
+[^:]*:34: Error: duplicate \.handlerdata directive
+[^:]*:41: Error: personality routine required before \.handlerdata directive
+[^:]*:48: Error: bad personality routine number
+[^:]*:50: Error: bad personality routine number
+[^:]*:59: Error: missing \.endp before \.cfi_startproc
diff --git a/gas/testsuite/gas/tic6x/unwind-bad-1.s b/gas/testsuite/gas/tic6x/unwind-bad-1.s
new file mode 100644
index 00000000000..b68df502827
--- /dev/null
+++ b/gas/testsuite/gas/tic6x/unwind-bad-1.s
@@ -0,0 +1,62 @@
+.cfi_sections .c6xabi.exidx
+
+# unexpected .handlerdata directive
+.handlerdata
+
+.cfi_startproc
+.personalityindex 0
+# duplicate .personalityindex directive
+.personalityindex 1
+# personality routine specified for cantunwind frame
+.cantunwind
+nop
+.cfi_endproc
+.endp
+
+.cfi_startproc
+.personality foo
+# personality routine specified for cantunwind frame
+.cantunwind
+nop
+.cfi_endproc
+.endp
+
+.cfi_startproc
+nop
+.cfi_endproc
+.personality foo
+# duplicate .personality directive
+.personality bar
+.handlerdata
+# unexpected .cantunwind directive
+.cantunwind
+# duplicate .handlerdata directive
+.handlerdata
+.endp
+
+.cfi_startproc
+nop
+.cfi_endproc
+# personality routine required before .handlerdata directive
+.handlerdata
+.endp
+
+.cfi_startproc
+nop
+.cfi_endproc
+# bad personality routine number
+.personalityindex 16
+# bad personality routine number
+.personalityindex -1
+.endp
+
+.cfi_startproc
+nop
+.cfi_endproc
+.personalityindex 1
+.handlerdata
+# missing .endp before .cfi_startproc
+.cfi_startproc
+.cfi_endproc
+.endp
+
diff --git a/gas/testsuite/gas/tic6x/unwind-bad-2.d b/gas/testsuite/gas/tic6x/unwind-bad-2.d
new file mode 100644
index 00000000000..5f8899ed3e8
--- /dev/null
+++ b/gas/testsuite/gas/tic6x/unwind-bad-2.d
@@ -0,0 +1,3 @@
+#name: C6X unwinding bad frame layouts
+#error-output: unwind-bad-2.l
+
diff --git a/gas/testsuite/gas/tic6x/unwind-bad-2.l b/gas/testsuite/gas/tic6x/unwind-bad-2.l
new file mode 100644
index 00000000000..bf171dc03c6
--- /dev/null
+++ b/gas/testsuite/gas/tic6x/unwind-bad-2.l
@@ -0,0 +1,14 @@
+[^:]*: Assembler messages:
+[^:]*:8: Error: stack pointer offset too large for personality routine
+[^:]*:20: Error: stack frame layout does not match personality routine
+[^:]*:33: Error: stack frame layout does not match personality routine
+[^:]*:39: Error: unable to generate unwinding opcode for reg 20
+[^:]*:46: Error: unable to generate unwinding opcode for reg 20
+[^:]*:53: Error: unable to generate unwinding opcode for reg 20
+[^:]*:63: Error: unable to restore return address from previously restored reg
+[^:]*:70: Error: unhandled CFA insn for unwinding \(259\)
+[^:]*:77: Error: unable to generate unwinding opcode for frame pointer reg 14
+[^:]*:84: Error: unable to generate unwinding opcode for frame pointer offset
+[^:]*:91: Error: unwound stack pointer not doubleword aligned
+[^:]*:100: Error: stack frame layout too complex for unwinder
+[^:]*:110: Error: unwound frame has negative size
diff --git a/gas/testsuite/gas/tic6x/unwind-bad-2.s b/gas/testsuite/gas/tic6x/unwind-bad-2.s
new file mode 100644
index 00000000000..9373bbd78eb
--- /dev/null
+++ b/gas/testsuite/gas/tic6x/unwind-bad-2.s
@@ -0,0 +1,113 @@
+.cfi_sections .c6xabi.exidx
+
+.cfi_startproc
+# stack pointer offset too large for personality routine
+.cfi_def_cfa_offset 0x3f8
+.cfi_endproc
+.personalityindex 3
+.endp
+
+.cfi_startproc
+.cfi_def_cfa_offset 8
+stw .d2t1 A11, *+B15(8)
+.cfi_offset 11, -0
+stw .d2t1 A10, *+B15(4)
+.cfi_offset 10, -4
+nop 4
+.cfi_endproc
+# stack frame layout does not match personality routine
+.personalityindex 4
+.endp
+
+.cfi_startproc
+stw .d2t2 B3, *B15--(8)
+.cfi_offset 19, 0
+.cfi_def_cfa_offset 8
+stw .d2t1 A11, *B15--(8)
+.cfi_offset 11, -8
+.cfi_def_cfa_offset 16
+nop 4
+.cfi_endproc
+# stack frame layout does not match personality routine
+.personalityindex 3
+.endp
+
+.cfi_startproc
+stw .d2t2 B4, *B15--(8)
+# unable to generate unwinding opcode for reg 20
+.cfi_offset 20, 0
+.cfi_endproc
+.endp
+
+.cfi_startproc
+mv .s2 B3, B4
+# unable to generate unwinding opcode for reg 20
+.cfi_register 19, 20
+.cfi_endproc
+.endp
+
+.cfi_startproc
+mv .s2 B4, B3
+# unable to generate unwinding opcode for reg 20
+.cfi_register 20, 19
+.cfi_endproc
+.endp
+
+.cfi_startproc
+stw .d2t2 B10, *B15--(8)
+# unable to generate unwinding opcode for reg 20
+.cfi_offset 26, 0
+mv .s2 B3, B10
+# unable to restore return address from previously restored reg
+.cfi_register 19, 26
+.cfi_endproc
+.endp
+
+.cfi_startproc
+nop
+# unhandled CFA insn for unwinding (259)
+.cfi_escape 42
+.cfi_endproc
+.endp
+
+.cfi_startproc
+nop
+# unable to generate unwinding opcode for frame pointer reg 14
+.cfi_def_cfa_register 14
+.cfi_endproc
+.endp
+
+.cfi_startproc
+nop
+# unable to generate unwinding opcode for frame pointer offset
+.cfi_def_cfa 15, 8
+.cfi_endproc
+.endp
+
+.cfi_startproc
+nop
+# unwound stack pointer not doubleword aligned
+.cfi_def_cfa_offset 12
+.cfi_endproc
+.endp
+
+.cfi_startproc
+nop
+.cfi_offset 10, 0
+# stack frame layout too complex for unwinder
+.cfi_offset 11, -0x808
+.cfi_def_cfa_offset 0x10000
+.cfi_endproc
+.endp
+
+.cfi_startproc
+nop
+.cfi_offset 12, -0
+.cfi_offset 11, -4
+.cfi_offset 10, -8
+.cfi_def_cfa_offset 8
+# unwound frame has negative size
+.cfi_endproc
+.endp
+
+
diff --git a/include/ChangeLog b/include/ChangeLog
index 231f4ba481e..5e96914724b 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,9 @@
+2011-05-09  Paul Brook  <paul@codesourcery.com>
+
+	* elf/tic6x.h (ELF_STRING_C6000_unwind,
+	ELF_STRING_C6000_unwind_info, ELF_STRING_C6000_unwind_once,
+	ELF_STRING_C6000_unwind_info_once): Define.
+
 2011-04-30  Jakub Jelinek  <jakub@redhat.com>
 
 	* dwarf2.h (DW_OP_GNU_const_type, DW_OP_GNU_regval_type,
diff --git a/include/elf/tic6x.h b/include/elf/tic6x.h
index 46f43c80707..e686cc3a584 100644
--- a/include/elf/tic6x.h
+++ b/include/elf/tic6x.h
@@ -158,4 +158,10 @@ enum
     C6XABI_Tag_ISA_C674X = 8
   };
 
+/* Special section names.  */
+#define ELF_STRING_C6000_unwind           ".c6xabi.exidx"
+#define ELF_STRING_C6000_unwind_info      ".c6xabi.extab"
+#define ELF_STRING_C6000_unwind_once      ".gnu.linkonce.c6xabi.exidx."
+#define ELF_STRING_C6000_unwind_info_once ".gnu.linkonce.c6xabi.extab."
+
 #endif /* _ELF_TIC6X_H */
-- 
2.30.2