linux.h (MD_UNWIND_SUPPORT): Remove.

	gcc:
	* config/alpha/linux.h (MD_UNWIND_SUPPORT): Remove.
	* config/alpha/osf5.h (MD_UNWIND_SUPPORT): Remove.
	* config/alpha/vms.h (MD_UNWIND_SUPPORT): Remove.
	* config/bfin/linux.h (MD_UNWIND_SUPPORT): Remove.
	* config/bfin/uclinux.h (MD_UNWIND_SUPPORT): Remove.
	* config/i386/linux.h (MD_UNWIND_SUPPORT): Remove.
	* config/i386/linux64.h (MD_UNWIND_SUPPORT): Remove.
	* config/i386/sol2.h (MD_UNWIND_SUPPORT): Remove.
	* config/i386/mingw32.h (MD_UNWIND_SUPPORT): Remove.
	* config/ia64/linux.h (MD_UNWIND_SUPPORT): Remove.
	* config/ia64/vms.h (MD_UNWIND_SUPPORT): Remove.
	* config/m68k/linux.h (MD_UNWIND_SUPPORT): Remove.
	* config/mips/linux.h (MD_UNWIND_SUPPORT): Remove.
	* config/pa/pa-hpux.h (MD_UNWIND_SUPPORT): Remove.
	* config/pa/pa32-linux.h (MD_UNWIND_SUPPORT): Remove.
	* config/rs6000/darwin.h (MD_UNWIND_SUPPORT): Remove.
	* config/rs6000/linux.h (MD_UNWIND_SUPPORT): Remove.
	* config/rs6000/linux64.h (MD_UNWIND_SUPPORT): Remove.
	* config/s390/linux.h (MD_UNWIND_SUPPORT): Remove.
	* config/s390/tpf.h (MD_UNWIND_SUPPORT): Remove.
	* config/sh/linux.h (MD_UNWIND_SUPPORT): Remove.
	* config/sparc/linux.h (MD_UNWIND_SUPPORT): Remove.
	* config/sparc/linux64.h (MD_UNWIND_SUPPORT): Remove.
	* config/sparc/sol2.h (MD_UNWIND_SUPPORT): Remove.
	* config/xtensa/linux.h (MD_UNWIND_SUPPORT): Remove.
	* config/alpha/linux-unwind.h: Move to ../libgcc/config/alpha.
	* config/alpha/osf5-unwind.h: Move to ../libgcc/config/alpha.
	* config/alpha/vms-unwind.h: Move to ../libgcc/config/alpha.
	* config/bfin/linux-unwind.h: Move to ../libgcc/config/bfin.
	* config/i386/linux-unwind.h: Move to ../libgcc/config/i386.
	* config/i386/sol2-unwind.h: Move to ../libgcc/config/i386.
	* config/i386/w32-unwind.h: Move to ../libgcc/config/i386.
	* config/ia64/linux-unwind.h: Move to ../libgcc/config/ia64.
	* config/ia64/vms-unwind.h: Move to ../libgcc/config/ia64.
	* config/m68k/linux-unwind.h: Move to ../libgcc/config/m68k.
	* config/mips/linux-unwind.h: Move to ../libgcc/config/mips.
	* config/pa/hpux-unwind.h: Move to ../libgcc/config/pa.
	* config/pa/linux-unwind.h: Move to ../libgcc/config/pa.
	* config/rs6000/darwin-unwind.h: Move to ../libgcc/config/rs6000.
	* config/rs6000/linux-unwind.h: Move to ../libgcc/config/rs6000.
	* config/s390/linux-unwind.h: Move to ../libgcc/config/s390.
	* config/s390/tpf-unwind.h: Move to ../libgcc/config/s390.
	* config/sh/linux-unwind.h: Move to ../libgcc/config/sh.
	* config/sparc/linux-unwind.h: Move to ../libgcc/config/sparc.
	* config/sparc/sol2-unwind.h: Move to ../libgcc/config/sparc.
	* config/xtensa/linux-unwind.h: Move to ../libgcc/config/xtensa.
	* config/darwin9.h (DARWIN_LIBSYSTEM_HAS_UNWIND): Remove.
	* system.h (MD_UNWIND_SUPPORT): Poison.
	* doc/tm.texi.in (Exception Handling, MD_UNWIND_SUPPORT): Remove.
	* doc/tm.texi: Regenerate.
	* unwind-dw2.c: Include md-unwind-support.h instead of
	MD_UNWIND_SUPPORT.
	* config/ia64/unwind-ia64.c: Likewise.
	* config/xtensa/unwind-dw2-xtensa.c: Likewise.

	libgcc:
	* config/alpha/linux-unwind.h: Move from ../gcc/config/alpha.
	* config/alpha/osf5-unwind.h: Move from ../gcc/config/alpha.
	* config/alpha/vms-unwind.h: Move from ../gcc/config/alpha.
	* config/bfin/linux-unwind.h: Move from ../gcc/config/bfin.
	* config/i386/linux-unwind.h: Move from ../gcc/config/i386.
	* config/i386/sol2-unwind.h: Move from ../gcc/config/i386.
	* config/i386/w32-unwind.h: Move from ../gcc/config/i386.
	Wrap in !__MINGW64__.
	* config/ia64/linux-unwind.h: Move from ../gcc/config/ia64.
	* config/ia64/vms-unwind.h: Move from ../gcc/config/ia64.
	* config/m68k/linux-unwind.h: Move from ../gcc/config/m68k.
	* config/mips/linux-unwind.h: Move from ../gcc/config/mips.
	* config/pa/hpux-unwind.h: Move from ../gcc/config/pa.
	* config/pa/linux-unwind.h: Move from ../gcc/config/pa.
	* config/rs6000/darwin-unwind.h: Move from ../gcc/config/rs6000.
	Wrap in !__LP64__.
	* config/rs6000/linux-unwind.h: Move from ../gcc/config/rs6000.
	* config/s390/linux-unwind.h: Move from ../gcc/config/s390.
	* config/s390/tpf-unwind.h: Move from ../gcc/config/s390.
	* config/sh/linux-unwind.h: Move from ../gcc/config/sh.
	* config/sparc/linux-unwind.h: Move from ../gcc/config/sparc.
	* config/sparc/sol2-unwind.h: Move from ../gcc/config/sparc.
	* config/xtensa/linux-unwind.h: Move from ../gcc/config/xtensa.
	* config/no-unwind.h: New file.
	* config.host (md_unwind_header): Document.
	Define.
	(alpha*-*-linux*, alpha*-dec-osf5.1*, alpha64-dec-*vms*,
	alpha*-dec-*vms*, bfin*-uclinux*, bfin*-linux-uclibc*,
	hppa*-*-linux*, hppa[12]*-*-hpux10*, hppa*64*-*-hpux11*,
	hppa[12]*-*-hpux11*): Set md_unwind_header.
	(i[34567]86-*-linux*): Handle i[34567]86-*-kopensolaris*-gnu.
	Set md_unwind_header.
	(x86_64-*-linux*, i[34567]86-*-solaris2*): Set md_unwind_header.
	(i[34567]86-*-cygwin*): Split from i[34567]86-*-mingw*.
	(i[34567]86-*-mingw*, ia64*-*-linux*, ia64-hp-*vms*,
	m68k-*-uclinux*, m68k-*-linux*, mips64*-*-linux*, mips*-*-linux*,
	powerpc-*-darwin*, powerpc-*-linux*, s390-*-linux*,
	s390x-*-linux*,  s390x-ibm-tpf*, sh*-*-linux*, sparc-*-linux*,
	sparc*-*-solaris2*, sparc64-*-linux*, xtensa*-*-linux*): Set
	md_unwind_header.
	* configure.ac: Link md-unwind-support.h to $md_unwind_header.
	* configure: Regenerate.

From-SVN: r174613

1 files changed, 199 insertions, 0 deletions

diff --git a/libgcc/config/ia64/linux-unwind.h b/libgcc/config/ia64/linux-unwind.h
new file mode 100644
index 00000000000..93f762de573
--- /dev/null
+++ b/libgcc/config/ia64/linux-unwind.h
@@ -0,0 +1,199 @@
+/* DWARF2 EH unwinding support for IA64 Linux.
+   Copyright (C) 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-ia64.c for the structs.  */
+
+/* This works only for glibc-2.3 and later, because sigcontext is different
+   in glibc-2.2.4.  */
+
+#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)
+#include <signal.h>
+#include <sys/ucontext.h>
+
+#define IA64_GATE_AREA_START 0xa000000000000100LL
+#define IA64_GATE_AREA_END   0xa000000000030000LL
+
+#define MD_FALLBACK_FRAME_STATE_FOR ia64_fallback_frame_state
+
+static _Unwind_Reason_Code
+ia64_fallback_frame_state (struct _Unwind_Context *context,
+			   _Unwind_FrameState *fs)
+{
+  if (context->rp >= IA64_GATE_AREA_START
+      && context->rp < IA64_GATE_AREA_END)
+    {
+      struct sigframe {
+	char scratch[16];
+	unsigned long sig_number;
+	struct siginfo *info;
+	struct sigcontext *sc;
+      } *frame_ = (struct sigframe *)context->psp;
+      struct sigcontext *sc = frame_->sc;
+
+      /* Restore scratch registers in case the unwinder needs to
+	 refer to a value stored in one of them.  */
+      {
+	int i;
+
+	for (i = 2; i < 4; i++)
+	  context->ireg[i - 2].loc = &sc->sc_gr[i];
+	for (i = 8; i < 12; i++)
+	  context->ireg[i - 2].loc = &sc->sc_gr[i];
+	for (i = 14; i < 32; i++)
+	  context->ireg[i - 2].loc = &sc->sc_gr[i];
+      }
+
+      context->fpsr_loc = &(sc->sc_ar_fpsr);
+      context->signal_pfs_loc = &(sc->sc_ar_pfs);
+      context->lc_loc = &(sc->sc_ar_lc);
+      context->unat_loc = &(sc->sc_ar_unat);
+      context->br_loc[0] = &(sc->sc_br[0]);
+      context->br_loc[6] = &(sc->sc_br[6]);
+      context->br_loc[7] = &(sc->sc_br[7]);
+      context->pr = sc->sc_pr;
+      context->psp = sc->sc_gr[12];
+      context->gp = sc->sc_gr[1];
+      /* Signal frame doesn't have an associated reg. stack frame
+         other than what we adjust for below.	  */
+      fs -> no_reg_stack_frame = 1;
+
+      if (sc->sc_rbs_base)
+	{
+	  /* Need to switch from alternate register backing store.  */
+	  long ndirty, loadrs = sc->sc_loadrs >> 16;
+	  unsigned long alt_bspstore = context->bsp - loadrs;
+	  unsigned long bspstore;
+	  unsigned long *ar_bsp = (unsigned long *)(sc->sc_ar_bsp);
+
+	  ndirty = ia64_rse_num_regs ((unsigned long *) alt_bspstore,
+				      (unsigned long *) context->bsp);
+	  bspstore = (unsigned long)
+	    ia64_rse_skip_regs (ar_bsp, -ndirty);
+	  ia64_copy_rbs (context, bspstore, alt_bspstore, loadrs,
+			 sc->sc_ar_rnat);
+	}
+
+      /* Don't touch the branch registers o.t. b0, b6 and b7.
+	 The kernel doesn't pass the preserved branch registers
+	 in the sigcontext but leaves them intact, so there's no
+	 need to do anything with them here.  */
+      {
+	unsigned long sof = sc->sc_cfm & 0x7f;
+	context->bsp = (unsigned long)
+	  ia64_rse_skip_regs ((unsigned long *)(sc->sc_ar_bsp), -sof);
+      }
+
+      /* Account for use of br.ret to resume execution of user code.  */
+      fs->curr.reg[UNW_REG_RP].where = UNW_WHERE_SPREL;
+      fs->curr.reg[UNW_REG_RP].val
+	= (unsigned long)&(sc->sc_ip) - context->psp;
+      fs->curr.reg[UNW_REG_RP].when = -1;
+
+      fs->curr.reg[UNW_REG_PFS].where = UNW_WHERE_SPREL;
+      fs->curr.reg[UNW_REG_PFS].val
+	= (unsigned long)&(sc->sc_cfm) - context->psp;
+      fs ->curr.reg[UNW_REG_PFS].when = -1;
+
+      return _URC_NO_REASON;
+    }
+  return _URC_END_OF_STACK;
+}
+
+#define MD_HANDLE_UNWABI ia64_handle_unwabi
+
+#define ABI_MARKER_OLD_LINUX_SIGTRAMP	((0 << 8) | 's')
+#define ABI_MARKER_OLD_LINUX_INTERRUPT	((0 << 8) | 'i')
+#define ABI_MARKER_LINUX_SIGTRAMP	((3 << 8) | 's')
+#define ABI_MARKER_LINUX_INTERRUPT	((3 << 8) | 'i')
+
+static void
+ia64_handle_unwabi (struct _Unwind_Context *context, _Unwind_FrameState *fs)
+{
+  if (fs->unwabi == ABI_MARKER_LINUX_SIGTRAMP
+      || fs->unwabi == ABI_MARKER_OLD_LINUX_SIGTRAMP)
+    {
+      struct sigframe {
+	char scratch[16];
+	unsigned long sig_number;
+	struct siginfo *info;
+	struct sigcontext *sc;
+      } *frame = (struct sigframe *)context->psp;
+      struct sigcontext *sc = frame->sc;
+
+      /* Restore scratch registers in case the unwinder needs to
+	 refer to a value stored in one of them.  */
+      {
+	int i;
+
+	for (i = 2; i < 4; i++)
+	  context->ireg[i - 2].loc = &sc->sc_gr[i];
+	for (i = 8; i < 12; i++)
+	  context->ireg[i - 2].loc = &sc->sc_gr[i];
+	for (i = 14; i < 32; i++)
+	  context->ireg[i - 2].loc = &sc->sc_gr[i];
+      }
+
+      context->signal_pfs_loc = &(sc->sc_ar_pfs);
+      context->lc_loc = &(sc->sc_ar_lc);
+      context->unat_loc = &(sc->sc_ar_unat);
+      context->br_loc[0] = &(sc->sc_br[0]);
+      context->br_loc[6] = &(sc->sc_br[6]);
+      context->br_loc[7] = &(sc->sc_br[7]);
+      context->pr = sc->sc_pr;
+      context->gp = sc->sc_gr[1];
+      /* Signal frame doesn't have an associated reg. stack frame
+         other than what we adjust for below.	  */
+      fs -> no_reg_stack_frame = 1;
+
+      if (sc->sc_rbs_base)
+	{
+	  /* Need to switch from alternate register backing store.  */
+	  long ndirty, loadrs = sc->sc_loadrs >> 16;
+	  unsigned long alt_bspstore = context->bsp - loadrs;
+	  unsigned long bspstore;
+	  unsigned long *ar_bsp = (unsigned long *)(sc->sc_ar_bsp);
+
+	  ndirty = ia64_rse_num_regs ((unsigned long *) alt_bspstore,
+				      (unsigned long *) context->bsp);
+	  bspstore = (unsigned long) ia64_rse_skip_regs (ar_bsp, -ndirty);
+	  ia64_copy_rbs (context, bspstore, alt_bspstore, loadrs,
+			 sc->sc_ar_rnat);
+	}
+
+      /* Don't touch the branch registers o.t. b0, b6 and b7.
+	 The kernel doesn't pass the preserved branch registers
+	 in the sigcontext but leaves them intact, so there's no
+	 need to do anything with them here.  */
+      {
+	unsigned long sof = sc->sc_cfm & 0x7f;
+	context->bsp = (unsigned long)
+	  ia64_rse_skip_regs ((unsigned long *)(sc->sc_ar_bsp), -sof);
+      }
+
+      /* The use of br.ret to resume execution of user code is already
+	 accounted for in the unwind ABI.  */
+    }
+}
+#endif /* glibc-2.3 or better */