2012-03-21 Andreas Tobler <andreast@fgznet.ch>

        * config.host: Add bits to support powerpc64-*-freebsd*.
        * config/rs6000/freebsd-unwind.h: New file.
        * config/rs6000/t-freebsd64: New file.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@185614 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index 11379bb..c4a34f6 100644 (file)
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,9 @@
+2012-03-21  Andreas Tobler  <andreast@fgznet.ch>
+
+       * config.host: Add bits to support powerpc64-*-freebsd*.
+       * config/rs6000/freebsd-unwind.h: New file.
+       * config/rs6000/t-freebsd64: New file.
+
 2012-03-20  Richard Guenther  <rguenther@suse.de>
 
        PR gcov-profile/52627

diff --git a/libgcc/config.host b/libgcc/config.host
index 4a0897c..1e81518 100644 (file)
--- a/libgcc/config.host
+++ b/libgcc/config.host
@@ -830,9 +830,15 @@ powerpc64-*-darwin*)
        tmake_file="$tmake_file rs6000/t-darwin64 rs6000/t-ibm-ldouble"
        extra_parts="$extra_parts crt2.o"
        ;;
-powerpc-*-freebsd*)
-       tmake_file="${tmake_file} rs6000/t-ppccomm rs6000/t-savresfgpr rs6000/t-crtstuff rs6000/t-freebsd t-softfp-sfdf t-softfp-excl t-softfp t-slibgcc-libgcc"
+powerpc*-*-freebsd*)
+       tmake_file="${tmake_file} rs6000/t-ppccomm rs6000/t-savresfgpr rs6000/t-crtstuff rs6000/t-freebsd t-softfp-sfdf t-softfp-excl t-softfp"
        extra_parts="$extra_parts crtbeginT.o ecrti.o ecrtn.o ncrti.o ncrtn.o"
+       case ${host} in
+       powerpc64*)
+         tmake_file="${tmake_file} rs6000/t-freebsd64"
+         md_unwind_header=rs6000/freebsd-unwind.h
+         ;;
+       esac
        ;;
 powerpc-*-netbsd*)
        tmake_file="$tmake_file rs6000/t-netbsd rs6000/t-crtstuff"

diff --git a/libgcc/config/rs6000/freebsd-unwind.h b/libgcc/config/rs6000/freebsd-unwind.h
new file mode 100644 (file)
index 0000000..3bdedff
--- /dev/null
+++ b/libgcc/config/rs6000/freebsd-unwind.h
@@ -0,0 +1,69 @@
+/* DWARF2 EH unwinding support for PowerPC64 FreeBSD.
+   Copyright (C) 2012 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/>.  */
+
+#define R_LR           65
+
+#define MD_FROB_UPDATE_CONTEXT frob_update_context
+
+static void
+frob_update_context (struct _Unwind_Context *context,
+                    _Unwind_FrameState *fs ATTRIBUTE_UNUSED)
+{
+  const unsigned int *pc = (const unsigned int *) context->ra;
+
+#ifdef __powerpc64__
+  if (fs->regs.reg[2].how == REG_UNSAVED)
+    {
+      /* If the current unwind info (FS) does not contain explicit info
+        saving R2, then we have to do a minor amount of code reading to
+        figure out if it was saved.  The big problem here is that the
+        code that does the save/restore is generated by the linker, so
+        we have no good way to determine at compile time what to do.  */
+      if (pc[0] == 0xF8410028
+         || ((pc[0] & 0xFFFF0000) == 0x3D820000
+             && pc[1] == 0xF8410028))
+       {
+         /* We are in a plt call stub or r2 adjusting long branch stub,
+            before r2 has been saved.  Keep REG_UNSAVED.  */
+       }
+      else
+       {
+         unsigned int *insn
+           = (unsigned int *) _Unwind_GetGR (context, R_LR);
+         if (insn && *insn == 0xE8410028)
+           _Unwind_SetGRPtr (context, 2, context->cfa + 40);
+         else if (pc[0] == 0x4E800421
+                  && pc[1] == 0xE8410028)
+           {
+             /* We are at the bctrl instruction in a call via function
+                pointer.  gcc always emits the load of the new R2 just
+                before the bctrl so this is the first and only place
+                we need to use the stored R2.  */
+             _Unwind_Word sp = _Unwind_GetGR (context, 1);
+             _Unwind_SetGRPtr (context, 2, (void *)(sp + 40));
+           }
+       }
+    }
+#endif
+}

diff --git a/libgcc/config/rs6000/t-freebsd64 b/libgcc/config/rs6000/t-freebsd64
new file mode 100644 (file)
index 0000000..5dc0d48
--- /dev/null
+++ b/libgcc/config/rs6000/t-freebsd64
@@ -0,0 +1,5 @@
+HOST_LIBGCC2_CFLAGS += -mno-minimal-toc
+SHLIB_MAPFILES = libgcc-std.ver
+
+softfp_wrap_start := '\#ifndef __powerpc64__'
+softfp_wrap_end := '\#endif'