--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/sparc/linux-unwind.h	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,155 @@
+/* DWARF2 EH unwinding support for SPARC Linux.
+   Copyright 2004, 2005, 2009 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+
+/* Do code reading to identify a signal frame, and set the frame
+   state data appropriately.  See unwind-dw2.c for the structs.  */
+
+/* Handle multilib correctly.  */
+#if defined(__arch64__)
+
+/* 64-bit SPARC version */
+#define MD_FALLBACK_FRAME_STATE_FOR sparc64_fallback_frame_state
+
+static _Unwind_Reason_Code
+sparc64_fallback_frame_state (struct _Unwind_Context *context,
+			      _Unwind_FrameState *fs)
+{
+  unsigned int *pc = context->ra;
+  long new_cfa, i;
+  long regs_off, fpu_save_off;
+  long this_cfa, fpu_save;
+
+  if (pc[0] != 0x82102065		/* mov NR_rt_sigreturn, %g1 */
+      || pc[1] != 0x91d0206d)		/* ta 0x6d */
+    return _URC_END_OF_STACK;
+  regs_off = 192 + 128;
+  fpu_save_off = regs_off + (16 * 8) + (3 * 8) + (2 * 4);
+  this_cfa = (long) context->cfa;
+  new_cfa = *(long *)((context->cfa) + (regs_off + (14 * 8)));
+  new_cfa += 2047; /* Stack bias */
+  fpu_save = *(long *)((this_cfa) + (fpu_save_off));
+  fs->regs.cfa_how = CFA_REG_OFFSET;
+  fs->regs.cfa_reg = 14;
+  fs->regs.cfa_offset = new_cfa - (long) context->cfa;
+  for (i = 1; i < 16; ++i)
+    {
+      fs->regs.reg[i].how = REG_SAVED_OFFSET;
+      fs->regs.reg[i].loc.offset =
+	this_cfa + (regs_off + (i * 8)) - new_cfa;
+    }
+  for (i = 0; i < 16; ++i)
+    {
+      fs->regs.reg[i + 16].how = REG_SAVED_OFFSET;
+      fs->regs.reg[i + 16].loc.offset =
+	this_cfa + (i * 8) - new_cfa;
+    }
+  if (fpu_save)
+    {
+      for (i = 0; i < 64; ++i)
+	{
+	  if (i > 32 && (i & 0x1))
+	    continue;
+	  fs->regs.reg[i + 32].how = REG_SAVED_OFFSET;
+	  fs->regs.reg[i + 32].loc.offset =
+	    (fpu_save + (i * 4)) - new_cfa;
+	}
+    }
+  /* Stick return address into %g0, same trick Alpha uses.  */
+  fs->regs.reg[0].how = REG_SAVED_OFFSET;
+  fs->regs.reg[0].loc.offset =
+    this_cfa + (regs_off + (16 * 8) + 8) - new_cfa;
+  fs->retaddr_column = 0;
+  return _URC_NO_REASON;
+}
+
+#else
+
+/* 32-bit SPARC version */
+#define MD_FALLBACK_FRAME_STATE_FOR sparc_fallback_frame_state
+
+static _Unwind_Reason_Code
+sparc_fallback_frame_state (struct _Unwind_Context *context,
+			    _Unwind_FrameState *fs)
+{
+  unsigned int *pc = context->ra;
+  int new_cfa, i, oldstyle;
+  int regs_off, fpu_save_off;
+  int fpu_save, this_cfa;
+
+  if (pc[1] != 0x91d02010)		/* ta 0x10 */
+    return _URC_END_OF_STACK;
+  if (pc[0] == 0x821020d8)		/* mov NR_sigreturn, %g1 */
+    oldstyle = 1;
+  else if (pc[0] == 0x82102065)	/* mov NR_rt_sigreturn, %g1 */
+    oldstyle = 0;
+  else
+    return _URC_END_OF_STACK;
+  if (oldstyle)
+    {
+      regs_off = 96;
+      fpu_save_off = regs_off + (4 * 4) + (16 * 4);
+    }
+  else
+    {
+      regs_off = 96 + 128;
+      fpu_save_off = regs_off + (4 * 4) + (16 * 4) + (2 * 4);
+    }
+  this_cfa = (int) context->cfa;
+  new_cfa = *(int *)((context->cfa) + (regs_off+(4*4)+(14 * 4)));
+  fpu_save = *(int *)((this_cfa) + (fpu_save_off));
+  fs->regs.cfa_how = CFA_REG_OFFSET;
+  fs->regs.cfa_reg = 14;
+  fs->regs.cfa_offset = new_cfa - (int) context->cfa;
+  for (i = 1; i < 16; ++i)
+    {
+      if (i == 14)
+	continue;
+      fs->regs.reg[i].how = REG_SAVED_OFFSET;
+      fs->regs.reg[i].loc.offset =
+	this_cfa + (regs_off+(4 * 4)+(i * 4)) - new_cfa;
+    }
+  for (i = 0; i < 16; ++i)
+    {
+      fs->regs.reg[i + 16].how = REG_SAVED_OFFSET;
+      fs->regs.reg[i + 16].loc.offset =
+	this_cfa + (i * 4) - new_cfa;
+    }
+  if (fpu_save)
+    {
+      for (i = 0; i < 32; ++i)
+	{
+	  fs->regs.reg[i + 32].how = REG_SAVED_OFFSET;
+	  fs->regs.reg[i + 32].loc.offset =
+	    (fpu_save + (i * 4)) - new_cfa;
+	}
+    }
+  /* Stick return address into %g0, same trick Alpha uses.  */
+  fs->regs.reg[0].how = REG_SAVED_OFFSET;
+  fs->regs.reg[0].loc.offset = this_cfa+(regs_off+4)-new_cfa;
+  fs->retaddr_column = 0;
+  return _URC_NO_REASON;
+}
+
+#endif