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.

1 files changed, 23 insertions, 75 deletions

diff --git a/gas/dw2gencfi.c b/gas/dw2gencfi.c
index 705157bff1..c35240bb35 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);
 }