From 84798bd6b6da79bc96633b981573ededa9727d44 Mon Sep 17 00:00:00 2001
From: Julian Brown <julian@codesourcery.com>
Date: Tue, 29 Mar 2005 16:29:09 +0000
Subject: 	* gas/config/tc-arm.c (marked_pr_dependency): New bitmap, bit
 N 	indicates whether personality routine index N has been output for this
 	section. 	(mapping_state): tc_segment_info_data now struct not
 enum. 	(arm_elf_change_section): Likewise, and marked_pr_dependency is now 
 handled on section change. 	(create_unwind_entry): Previous code to output
 dependency removed. 	(s_arm_unwind_fnend): Output dependency if it hasn't
 been done already 	for this section. 	* gas/config/tc-arm.h
 (TC_SEGMENT_INFO_TYPE): Redefined as struct 	arm_segment_info_type. 
 (arm_segment_info_type): New struct. 	* gas/testsuite/gas/arm/unwind.d:
 Update expected output.

---
 gas/config/tc-arm.c | 49 ++++++++++++++++++++++++++++---------------------
 1 file changed, 28 insertions(+), 21 deletions(-)

(limited to 'gas/config/tc-arm.c')

diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c
index 19faa62..9baf888 100644
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -83,6 +83,11 @@ static struct
   unsigned        sp_restored:1;
 } unwind;
 
+/* Bit N indicates that an R_ARM_NONE relocation has been output for
+   __aeabi_unwind_cpp_prN already if set. This enables dependencies to be
+   emitted only once per section, to save unnecessary bloat.  */
+static unsigned int marked_pr_dependency = 0;
+
 #endif /* OBJ_ELF */
 
 enum arm_float_abi
@@ -1347,7 +1352,7 @@ mapping_state (enum mstate state)
       abort ();
     }
 
-  seg_info (now_seg)->tc_segment_info_data = state;
+  seg_info (now_seg)->tc_segment_info_data.mapstate = state;
 
   symbolP = symbol_new (symname, now_seg, (valueT) frag_now_fix (), frag_now);
   symbol_table_insert (symbolP);
@@ -1379,6 +1384,7 @@ void
 arm_elf_change_section (void)
 {
   flagword flags;
+  segment_info_type *seginfo;
 
   /* Link an unlinked unwind index table section to the .text section.  */
   if (elf_section_type (now_seg) == SHT_ARM_EXIDX
@@ -1394,7 +1400,9 @@ arm_elf_change_section (void)
   if ((flags & SEC_ALLOC) == 0)
     return;
 
-  mapstate = seg_info (now_seg)->tc_segment_info_data;
+  seginfo = seg_info (now_seg);
+  mapstate = seginfo->tc_segment_info_data.mapstate;
+  marked_pr_dependency = seginfo->tc_segment_info_data.marked_pr_dependency;
 }
 
 int
@@ -14303,13 +14311,6 @@ create_unwind_entry (int have_data)
       fix_new (frag_now, where, 4, unwind.personality_routine, 0, 1,
 	       BFD_RELOC_ARM_PREL31);
 
-      /* Indicate dependency to linker.  */
-        {
-          char *name = "__aeabi_unwind_cpp_pr0";
-	  symbolS *pr = symbol_find_or_make (name);
-	  fix_new (frag_now, where, 4, pr, 0, 1, BFD_RELOC_NONE);
-	}
-
       where += 4;
       ptr += 4;
 
@@ -14323,24 +14324,13 @@ create_unwind_entry (int have_data)
       /* Three opcodes bytes are packed into the first word.  */
       data = 0x80;
       n = 3;
-      goto emit_reloc;
+      break;
 
     case 1:
     case 2:
       /* The size and first two opcode bytes go in the first word.  */
       data = ((0x80 + unwind.personality_index) << 8) | size;
       n = 2;
-      goto emit_reloc;
-
-    emit_reloc:
-      {
-	/* Indicate dependency to linker.  */
-	char *name[] = { "__aeabi_unwind_cpp_pr0",
-	                 "__aeabi_unwind_cpp_pr1",
-			 "__aeabi_unwind_cpp_pr2" };
-	symbolS *pr = symbol_find_or_make (name[unwind.personality_index]);
-	fix_new (frag_now, where, 4, pr, 0, 1, BFD_RELOC_NONE);
-      }
       break;
 
     default:
@@ -14449,6 +14439,23 @@ s_arm_unwind_fnend (int ignored ATTRIBUTE_UNUSED)
   fix_new (frag_now, where, 4, unwind.proc_start, 0, 1,
 	   BFD_RELOC_ARM_PREL31);
 
+  /* Indicate dependency on EHABI-defined personality routines to the
+     linker, if it hasn't been done already.  */
+  if (unwind.personality_index >= 0 && unwind.personality_index < 3)
+    {
+      char *name[] = { "__aeabi_unwind_cpp_pr0",
+		       "__aeabi_unwind_cpp_pr1",
+		       "__aeabi_unwind_cpp_pr2" };
+      if (!(marked_pr_dependency & (1 << unwind.personality_index)))
+	{
+	  symbolS *pr = symbol_find_or_make (name[unwind.personality_index]);
+	  fix_new (frag_now, where, 0, pr, 0, 1, BFD_RELOC_NONE);
+	  marked_pr_dependency |= 1 << unwind.personality_index;
+	  seg_info (now_seg)->tc_segment_info_data.marked_pr_dependency
+	    = marked_pr_dependency;
+        }
+    }
+
   if (val)
     /* Inline exception table entry.  */
     md_number_to_chars (ptr + 4, val, 4);
-- 
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