From: Alexandre Oliva <aoliva@redhat.com>
Date: Sun, 28 May 2006 05:56:50 +0000 (+0000)
Subject: * dwarf2-frame.h (enum dwarf2_frame_reg_rule): Add
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=46ea248bcc124c1874e8783c5e4cd90dae6610a2;p=binutils-gdb.git

* dwarf2-frame.h (enum dwarf2_frame_reg_rule): Add
DWARF2_FRAME_REG_SAVED_VAL_OFFSET and
DWARF2_FRAME_REG_SAVED_VAL_EXP.
* dwarf2-frame.c (execute_cfa_program): Handle val_offset,
val_offset_sf and val_expression.
(dwarf2_frame_prev_register): Handle the new reg rules.
(dwarf2_frame_this_id): Use pc instead of function entry point.
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index d1fbeb6b7cf..f96c664c796 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,13 @@
+2006-05-28  Alexandre Oliva  <aoliva@redhat.com>
+
+	* dwarf2-frame.h (enum dwarf2_frame_reg_rule): Add
+	DWARF2_FRAME_REG_SAVED_VAL_OFFSET and
+	DWARF2_FRAME_REG_SAVED_VAL_EXP.
+	* dwarf2-frame.c (execute_cfa_program): Handle val_offset,
+	val_offset_sf and val_expression.
+	(dwarf2_frame_prev_register): Handle the new reg rules.
+	(dwarf2_frame_this_id): Use pc instead of function entry point.
+
 2006-05-28  Alexandre Oliva  <aoliva@redhat.com>
 
 	* dwarf2-frame.c (struct dwarf2_cie): Add signal_frame field.
diff --git a/gdb/dwarf2-frame.c b/gdb/dwarf2-frame.c
index 6b81dff7999..edd9a7536ae 100644
--- a/gdb/dwarf2-frame.c
+++ b/gdb/dwarf2-frame.c
@@ -481,6 +481,34 @@ bad CFI data; mismatched DW_CFA_restore_state at 0x%s"), paddr (fs->pc));
 	      fs->regs.reg[reg].loc.offset = offset;
 	      break;
 
+	    case DW_CFA_val_offset:
+	      insn_ptr = read_uleb128 (insn_ptr, insn_end, &reg);
+	      dwarf2_frame_state_alloc_regs (&fs->regs, reg + 1);
+	      insn_ptr = read_uleb128 (insn_ptr, insn_end, &utmp);
+	      offset = utmp * fs->data_align;
+	      fs->regs.reg[reg].how = DWARF2_FRAME_REG_SAVED_VAL_OFFSET;
+	      fs->regs.reg[reg].loc.offset = offset;
+	      break;
+
+	    case DW_CFA_val_offset_sf:
+	      insn_ptr = read_uleb128 (insn_ptr, insn_end, &reg);
+	      dwarf2_frame_state_alloc_regs (&fs->regs, reg + 1);
+	      insn_ptr = read_sleb128 (insn_ptr, insn_end, &offset);
+	      offset *= fs->data_align;
+	      fs->regs.reg[reg].how = DWARF2_FRAME_REG_SAVED_VAL_OFFSET;
+	      fs->regs.reg[reg].loc.offset = offset;
+	      break;
+
+	    case DW_CFA_val_expression:
+	      insn_ptr = read_uleb128 (insn_ptr, insn_end, &reg);
+	      dwarf2_frame_state_alloc_regs (&fs->regs, reg + 1);
+	      insn_ptr = read_uleb128 (insn_ptr, insn_end, &utmp);
+	      fs->regs.reg[reg].loc.exp = insn_ptr;
+	      fs->regs.reg[reg].exp_len = utmp;
+	      fs->regs.reg[reg].how = DWARF2_FRAME_REG_SAVED_VAL_EXP;
+	      insn_ptr += utmp;
+	      break;
+
 	    case DW_CFA_def_cfa_sf:
 	      insn_ptr = read_uleb128 (insn_ptr, insn_end, &fs->cfa_reg);
 	      if (eh_frame_p)
@@ -965,6 +993,28 @@ dwarf2_frame_prev_register (struct frame_info *next_frame, void **this_cache,
 	}
       break;
 
+    case DWARF2_FRAME_REG_SAVED_VAL_OFFSET:
+      *optimizedp = 0;
+      *lvalp = not_lval;
+      *addrp = 0;
+      *realnump = -1;
+      if (valuep)
+	store_unsigned_integer (valuep, register_size (gdbarch, regnum),
+				cache->cfa + cache->reg[regnum].loc.offset);
+      break;
+
+    case DWARF2_FRAME_REG_SAVED_VAL_EXP:
+      *optimizedp = 0;
+      *lvalp = not_lval;
+      *addrp = 0;
+      *realnump = -1;
+      if (valuep)
+	store_unsigned_integer (valuep, register_size (gdbarch, regnum),
+				execute_stack_op (cache->reg[regnum].loc.exp,
+						  cache->reg[regnum].exp_len,
+						  next_frame, cache->cfa));
+      break;
+
     case DWARF2_FRAME_REG_UNSPECIFIED:
       /* GCC, in its infinite wisdom decided to not provide unwind
 	 information for registers that are "same value".  Since
diff --git a/gdb/dwarf2-frame.h b/gdb/dwarf2-frame.h
index da9fe4788f1..15f456d7575 100644
--- a/gdb/dwarf2-frame.h
+++ b/gdb/dwarf2-frame.h
@@ -51,6 +51,10 @@ enum dwarf2_frame_reg_rule
   DWARF2_FRAME_REG_SAVED_EXP,
   DWARF2_FRAME_REG_SAME_VALUE,
 
+  /* These are defined in Dwarf3.  */
+  DWARF2_FRAME_REG_SAVED_VAL_OFFSET,
+  DWARF2_FRAME_REG_SAVED_VAL_EXP,
+
   /* These aren't defined by the DWARF2 CFI specification, but are
      used internally by GDB.  */
   DWARF2_FRAME_REG_RA,		/* Return Address.  */