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2024-01-12libgcc, nios2: Fix exception handling on nios2 with -fpicSandra Loosemore1-2/+3
Exception handling on nios2-linux-gnu with -fpic has been broken since revision 790854ea7670f11c14d431c102a49181d2915965, "Use _dl_find_object in _Unwind_Find_FDE". For whatever reason, this doesn't work on nios2. Nios2 uses the GOT address as the base for DW_EH_PE_datarel relocations in PIC; see my previous fix to make this work, revision 2d33dcfe9f0494c9b56a8d704c3d27c5a4329ebc, "Support for GOT-relative DW_EH_PE_datarel encoding". So this may be a horrible bug in the ABI or in my interpretation of it or just glibc's implementation of _dl_find_object for this target, but there's existing code out there that does things this way; and realistically, nobody is going to re-engineer this now that the vendor has EOL'ed the nios2 architecture. So, just skip over the code trying to use _dl_find_object on this target and fall back to the way that works. I plan to backport this patch to the GCC 12 and GCC 13 branches as well. libgcc/ChangeLog * unwind-dw2-fde-dip.c (_Unwind_Find_FDE): Do not try to use _dl_find_object on nios2; it doesn't work.
2024-01-03Update copyright years.Jakub Jelinek1-1/+1
2023-07-11libgcc: Fix -Wint-conversion warning in find_fde_tailFlorian Weimer1-1/+1
Fixes commit r14-1614-g49310a99330849 ("libgcc: Fix eh_frame fast path in find_fde_tail"). libgcc/ PR libgcc/110179 * unwind-dw2-fde-dip.c (find_fde_tail): Add cast to avoid implicit conversion of pointer value to integer.
2023-06-07libgcc: Fix eh_frame fast path in find_fde_tailFlorian Weimer1-1/+1
The eh_frame value is only used by linear_search_fdes, not the binary search directly in find_fde_tail, so the bug is not immediately apparent with most programs. Fixes commit e724b0480bfa5ec04f39be8c7290330b495c59de ("libgcc: Special-case BFD ld unwind table encodings in find_fde_tail"). libgcc/ PR libgcc/109712 * unwind-dw2-fde-dip.c (find_fde_tail): Correct fast path for parsing eh_frame.
2023-01-16Update copyright years.Jakub Jelinek1-1/+1
2022-11-04libgcc: Special-case BFD ld unwind table encodings in find_fde_tailFlorian Weimer1-10/+48
BFD ld (and the other linkers) only produce one encoding of these values. It is not necessary to use the general read_encoded_value_with_base decoding routine. This avoids the data-dependent branches in its implementation. libgcc/ * unwind-dw2-fde-dip.c (find_fde_tail): Special-case encoding values actually used by BFD ld.
2022-02-25libgcc: fix a warning calling find_fde_tailXi Ruoyao1-1/+1
The third parameter of find_fde_tail is an _Unwind_Ptr (which is an integer type instead of a pointer), but we are passing NULL to it. This causes a -Wint-conversion warning. libgcc/ * unwind-dw2-fde-dip.c (_Unwind_Find_FDE): Call find_fde_tail with 0 instead of NULL.
2022-01-25libgcc: Fix _Unwind_Find_FDE for missing unwind data with glibc 2.35Florian Weimer1-1/+1
_dl_find_object returns success even if no unwind information has been found, and dlfo_eh_frame is NULL. libgcc/ChangeLog: PR libgcc/104207 * unwind-dw2-fde-dip.c (_Unwind_Find_FDE): Add NULL check.
2022-01-04libgcc: Use _dl_find_object in _Unwind_Find_FDEFlorian Weimer1-0/+18
libgcc/ChangeLog: * unwind-dw2-fde-dip.c (_Unwind_Find_FDE): Call _dl_find_object if available.
2022-01-03Update copyright years.Jakub Jelinek1-1/+1
2021-11-25libgcc: Split FDE search code from PT_GNU_EH_FRAME lookupFlorian Weimer1-42/+50
This allows switching to a different implementation for PT_GNU_EH_FRAME lookup in a subsequent commit. This moves some of the PT_GNU_EH_FRAME parsing out of the glibc loader lock that is implied by dl_iterate_phdr. However, the FDE is already parsed outside the lock before this change, so this does not introduce additional crashes in case of a concurrent dlclose. libgcc/ChangeLog: * unwind-dw2-fde-dip.c (struct unw_eh_callback_data): Add hdr. Remove func, ret. (find_fde_tail): New function. Split from _Unwind_IteratePhdrCallback. Move the result initialization from _Unwind_Find_FDE. (_Unwind_Find_FDE): Updated to call find_fde_tail.
2021-11-22libgcc: Remove dbase member from struct unw_eh_callback_data if NULLFlorian Weimer1-7/+39
Only bfin, frv, i386 and nios2 need this member at present. libgcc/ChangeLog * unwind-dw2-fde-dip.c (NEED_DBASE_MEMBER): Define. (struct unw_eh_callback_data): Make dbase member conditional. (unw_eh_callback_data_dbase): New function. (base_from_cb_data): Simplify for the non-dbase case. (_Unwind_IteratePhdrCallback): Adjust. (_Unwind_Find_FDE): Likewise.
2021-11-22libgcc: Remove tbase member from struct unw_eh_callback_dataFlorian Weimer1-5/+3
It is always a null pointer. libgcc/ChangeLog * unwind-dw2-fde-dip.c (struct unw_eh_callback_data): Remove tbase member. (base_from_cb_data): Adjust. (_Unwind_IteratePhdrCallback): Likewise. (_Unwind_Find_FDE): Likewise.
2021-01-04Update copyright years.Jakub Jelinek1-1/+1
2020-11-20NetBSD/libgcc: Check for TARGET_DL_ITERATE_PHDR in the unwinderMaciej W. Rozycki1-0/+1
Disable USE_PT_GNU_EH_FRAME frame unwinder support for old OS versions, fixing compilation errors: .../libgcc/unwind-dw2-fde-dip.c:75:21: error: unknown type name 'Elf_Phdr' 75 | # define ElfW(type) Elf_##type | ^~~~ .../libgcc/unwind-dw2-fde-dip.c:132:9: note: in expansion of macro 'ElfW' 132 | const ElfW(Phdr) *p_eh_frame_hdr; | ^~~~ .../libgcc/unwind-dw2-fde-dip.c:75:21: error: unknown type name 'Elf_Phdr' 75 | # define ElfW(type) Elf_##type | ^~~~ .../libgcc/unwind-dw2-fde-dip.c:133:9: note: in expansion of macro 'ElfW' 133 | const ElfW(Phdr) *p_dynamic; | ^~~~ .../libgcc/unwind-dw2-fde-dip.c:165:37: warning: 'struct dl_phdr_info' declared inside parameter list will not be visible outside of this definition or declaration 165 | _Unwind_IteratePhdrCallback (struct dl_phdr_info *info, size_t size, void *ptr) | ^~~~~~~~~~~~ [...] and producing a working cross-compiler at least with VAX/NetBSD 1.6.2. libgcc/ * unwind-dw2-fde-dip.c [__OpenBSD__ || __NetBSD__] (USE_PT_GNU_EH_FRAME): Do not define if !TARGET_DL_ITERATE_PHDR.
2020-01-31nios2: Support for GOT-relative DW_EH_PE_datarel encoding.Sandra Loosemore1-1/+1
On nios2-linux-gnu, there has been a long-standing bug in C++ exception handling that sometimes resulted in link errors like ../nios2-linux-gnu/bin/ld: FDE encoding in /tmp/cccfpQ2l.o(.eh_frame) prevents .eh_frame_hdr table being created when building some shared libraries or PIE executables. The root of the problem is that GCC was incorrectly emitting an absolute encoding in EH tables for PIC. This patch changes it to use either DW_EH_PE_indirect (for global) or DW_EH_PE_datarel (for local), and fixes libgcc so it can find the address of the GOT as the base address for DW_EH_PE_datarel. Complicating matters somewhat, GAS was missing support for %gotoff(symbol) relocation syntax. I have just pushed a fix for that, but I've added a configure check to test for presence of the binutils support and fall back to the current absolute encoding (which works most of the time) if it is not available. Once the fix makes it into an official binutils release it might be appropriate to make this error out instead. Since this is a wrong-code bug and affects only nios2 target, I think this is appropriate for Stage 4. I regression-tested on both nios2-linux-gnu and nios2-elf, with and without the binutils support present, before committing this. 2020-01-31 Sandra Loosemore <sandra@codesourcery.com> gcc/ * configure.ac [nios2-*-*]: Check HAVE_AS_NIOS2_GOTOFF_RELOCATION. * config.in: Regenerated. * configure: Regenerated. * config/nios2/nios2.h (ASM_PREFERRED_EH_DATA_FORMAT): Fix handling for PIC when HAVE_AS_NIOS2_GOTOFF_RELOCATION. (ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX): New. gcc/testsuite/ * g++.target/nios2/hello-pie.C: New. * g++.target/nios2/nios2.exp: New. libgcc/ * config.host [nios2-*-linux*] (tmake_file, tm_file): Adjust. * config/nios2-elf-lib.h: New. * unwind-dw2-fde-dip.c (_Unwind_IteratePhdrCallback): Use existing code for finding GOT base for nios2.
2020-01-01Update copyright years.Jakub Jelinek1-1/+1
From-SVN: r279813
2019-01-01Update copyright years.Jakub Jelinek1-1/+1
From-SVN: r267494
2018-01-03Update copyright years.Jakub Jelinek1-1/+1
From-SVN: r256169
2017-01-01Update copyright years.Jakub Jelinek1-1/+1
From-SVN: r243994
2016-12-19config.host (*-*-netbsd*): Add t-eh-dw2-dip to tmake_file.Krister Walfridsson1-1/+1
2016-12-19 Krister Walfridsson <krister.walfridsson@gmail.com> * config.host (*-*-netbsd*): Add t-eh-dw2-dip to tmake_file. * crtstuff.c (BSD_DL_ITERATE_PHDR_AVAILABLE): Define for NetBSD. * unwind-dw2-fde-dip.c (USE_PT_GNU_EH_FRAME, ElfW): Likewise. From-SVN: r243790
2016-11-16re PR libgcc/68468 (frv/bfin FDPIC toolchain build error)Waldemar Brodkorb1-2/+6
PR libgcc/68468 * unwind-dw2-fde-dip.c: Fix build on FDPIC targets. From-SVN: r242468
2016-01-04Update copyright years.Jakub Jelinek1-1/+1
From-SVN: r232055
2015-04-22unwind fix for muslGregor Richards1-0/+6
On behalf of szabolcs.nagy@arm.com 2015-04-22 Gregor Richards <gregor.richards@uwaterloo.ca> Szabolcs Nagy <szabolcs.nagy@arm.com> * unwind-dw2-fde-dip.c (USE_PT_GNU_EH_FRAME): Define it on Linux if target provides dl_iterate_phdr. Co-Authored-By: Szabolcs Nagy <szabolcs.nagy@arm.com> From-SVN: r222328
2015-01-27Move Solaris/x86 CRT_GET_RFIB_DATA definition to libgccRainer Orth1-3/+0
gcc: * config/i386/sysv4.h (CRT_GET_RFIB_DATA): Remove. libgcc: * config.host (i[34567]86-*-solaris2*, x86_64-*-solaris2.1[0-9]*): Add i386/elf-lib.h to tm_file. * config/i386/elf-lib.h: Fix comment. * unwind-dw2-fde-dip.c (_Unwind_IteratePhdrCallback) [__x86_64__ && __sun__ && __svr4__]: Remove workaround. From-SVN: r220160
2015-01-05Update copyright years.Jakub Jelinek1-1/+1
From-SVN: r219188
2014-05-21config.gcc (*-*-dragonfly*): New target.John Marino1-1/+2
2014-05-21 John Marino <gnugcc@marino.st> gcc: * config.gcc (*-*-dragonfly*): New target. * configure.ac: Detect dl_iterate_phdr (*freebsd*, *dragonfly*). * configure: Regenerate. * config/dragonfly-stdint.h: New. * config/dragonfly.h: New. * config/dragonfly.opt: New. * config/i386/dragonfly.h: New. * ginclude/stddef.h: Detect _PTRDIFF_T_DECLARED for DragonFly. include: * liberty.h: Use basename function on DragonFly. libcilkrts: * runtime/os-unix.c (__DragonFly__): New target. libgcc: * config.host (*-*-dragonfly*): New target. * crtstuff.c: Make dl_iterate_support generic on *bsd. * enable-execute-stack-mprotect.c: Always mprotect on FreeBSD. * unwind-dw2-fde-dip.c: Add dl_iterate_phr support for DragonFly. * config/i386/dragonfly-unwind.h: New. libitm: * configure.tgt (*-*-dragonfly*): New target. libstdc++-v3: * acinclude.m4 (*-*-dragonfly*): New target. * configure: Regenerate. * configure.host (*-*-dragonfly*): New target. * config/locale/dragonfly/c_locale.cc: New. * config/locale/dragonfly/ctype_members.cc: New. * config/os/bsd/dragonfly/ctype_base.h: New. * config/os/bsd/dragonfly/ctype_configure_char.cc: New. * config/os/bsd/dragonfly/ctype_inline.h: New. * config/os/bsd/dragonfly/os_defines.h: New. From-SVN: r210694
2014-01-02Update copyright years in libgcc/Richard Sandiford1-1/+1
From-SVN: r206295
2013-02-04Update copyright in libgcc.Richard Sandiford1-2/+1
From-SVN: r195731
2012-10-05config.host (*-*-openbsd*): Add t-eh-dw2-dip to tmake_file.Mark Kettenis1-1/+7
* config.host (*-*-openbsd*): Add t-eh-dw2-dip to tmake_file. * unwind-dw2-fde-dip.c: Don't include <elf.h> on OpenBSD. (USE_PT_GNU_EH_FRAME): Define for OpenBSD. (ElfW): Likewise. From-SVN: r192148
2012-04-24unwind-dw2-fde-dip.c: Define USE_PT_GNU_EH_FRAME for BIONIC.Chao-ying Fu1-0/+5
2012-04-24 Chao-ying Fu <fu@mips.com> * unwind-dw2-fde-dip.c: Define USE_PT_GNU_EH_FRAME for BIONIC. From-SVN: r186788
2011-11-02Move libgcc_tm_file to toplevel libgccRainer Orth1-1/+2
gcc: * configure.ac (libgcc_tm_file_list, libgcc_tm_include_list): Remove. * configure: Regenerate. * Makefile.in (libgcc_tm_file_list, libgcc_tm_include_list): Remove. (TM_H): Remove libgcc_tm.h, $(libgcc_tm_file_list). (libgcc_tm.h, cs-libgcc_tm.h): Remove. (clean): Remove libgcc_tm.h * mkconfig.sh: Don't include libgcc_tm.h in tm.h. * config.gcc (libgcc_tm_file): Remove. (arm*-*-linux*): Remove libgcc_tm_file for arm*-*-linux-*eabi. (arm*-*-uclinux*): Remove libgcc_tm_file for arm*-*-uclinux*eabi. (arm*-*-eabi*, arm*-*-symbianelf*): Remove libgcc_tm_file. (avr-*-rtems*): Likewise. (avr-*-*): Likewise. (frv-*-elf): Likewise. (frv-*-*linux*): Likewise. (h8300-*-rtems*): Likewise. (h8300-*-elf*): Likewise. (i[34567]86-*-darwin*): Likewise. (x86_64-*-darwin*): Likewise. (rx-*-elf*): Likewise. (tic6x-*-elf): Likewise. (tic6x-*-uclinux): Likewise. (i[34567]86-*-linux*, x86_64-*-linux*): Likewise. libgcc: * configure.ac (tm_file_): New variable. Determine from tm_file. (tm_file, tm_defines): Substitute. * configure: Regenerate. * mkheader.sh: New file. * Makefile.in (clean): Remove libgcc_tm.h. ($(objects)): Depend on libgcc_tm.h. (libgcc_tm_defines, libgcc_tm_file): New variables. (libgcc_tm.h, libgcc_tm.stamp): New targets. ($(libgcc-objects), $(libgcc-s-objects), $(libgcc-eh-objects)) ($(libgcov-objects), $(libunwind-objects), $(libunwind-s-objects)) ($(extra-parts)): Depend on libgcc_tm.h. * config.host (tm_defines, tm_file): New variable. (arm*-*-linux*): Set tm_file for arm*-*-linux-*eabi. (arm*-*-uclinux*): Set tm_file for arm*-*-uclinux*eabi. (arm*-*-eabi*, arm*-*-symbianelf*): Set tm_file. (avr-*-rtems*): Likewise. (avr-*-*): Likewise. (frv-*-elf): Likewise. (frv-*-*linux*): Likewise. (h8300-*-rtems*): Likewise. (h8300-*-elf*): Likewise. (i[34567]86-*-darwin*): Likewise. (x86_64-*-darwin*): Likewise. (rx-*-elf): Likewise. (tic6x-*-uclinux): Likewise. (tic6x-*-elf): Likewise. (i[34567]86-*-linux*, x86_64-*-linux*): Likewise. * config/alpha/gthr-posix.c: Include libgcc_tm.h. * config/i386/cygming-crtbegin.c: Likewise. * config/i386/cygming-crtend.c: Likewise. * config/ia64/fde-vms.c: Likewise. * config/ia64/unwind-ia64.c: Likewise. * config/libbid/bid_gcc_intrinsics.h: Likewise. * config/rs6000/darwin-fallback.c: Likewise. * config/stormy16/lib2funcs.c: Likewise. * config/xtensa/unwind-dw2-xtensa.c: Likewise. * crtstuff.c: Likewise. * dfp-bit.h: Likewise. * emutls.c: Likewise. * fixed-bit.c: Likewise. * fp-bit.c: Likewise. * generic-morestack-thread.c: Likewise. * generic-morestack.c: Likewise. * libgcc2.c: Likewise. * libgcov.c: Likewise. * unwind-dw2-fde-dip.c: Likewise. * unwind-dw2-fde.c: Likewise. * unwind-dw2.c: Likewise. * unwind-sjlj.c: Likewise. Co-Authored-By: Paolo Bonzini <bonzini@gnu.org> From-SVN: r180775
2011-08-05Makefile.in (UNWIND_H): Remove.Rainer Orth1-0/+470
gcc: * Makefile.in (UNWIND_H): Remove. (LIB2ADDEH, LIB2ADDEHSTATIC, LIB2ADDEHSHARED): Move to ../libgcc/Makefile.in. (LIBUNWIND, SHLIBUNWIND_LINK, SHLIBUNWIND_INSTALL): Likewise. (LIBUNWINDDEP): Remove. (libgcc-support): Remove LIB2ADDEH, $(srcdir)/emutls.c dependencies. (libgcc.mvars): Remove LIB2ADDEH, LIB2ADDEHSTATIC, LIB2ADDEHSHARED, LIBUNWIND, SHLIBUNWIND_LINK, SHLIBUNWIND_INSTALL. (stmp-int-hdrs): Remove $(UNWIND_H) dependency. Don't copy $(UNWIND_H). * config.gcc (ia64*-*-linux*): Remove with_system_libunwind handling. * configure.ac (GCC_CHECK_UNWIND_GETIPINFO): Remove. * aclocal.m4: Regenerate. * configure: Regenerate. * emutls.c, unwind-c.c, unwind-compat.c, unwind-compat.h, unwind-dw2-fde-compat.c, unwind-dw2-fde-glibc.c, unwind-dw2-fde.c, unwind-dw2-fde.h, unwind-dw2.c, unwind-dw2.h, unwind-generic.h, unwind-pe.h, unwind-sjlj.c, unwind.inc: Move to ../libgcc. * unwind-dw2-fde-darwin.c: Move to ../libgcc/config. * config/arm/libunwind.S, config/arm/pr-support.c, config/arm/unwind-arm.c, config/arm/unwind-arm.h: Move to ../libgcc/config/arm. * config/arm/t-bpabi (UNWIND_H, LIB2ADDEH): Remove. * config/arm/t-symbian (UNWIND_H, LIB2ADDEH): Remove. * config/frv/t-frv ($(T)frvbegin$(objext)): Use $(srcdir)/../libgcc to refer to unwind-dw2-fde.h. ($(T)frvend$(objext)): Likewise. * config/ia64/t-glibc (LIB2ADDEH): Remove. * config/ia64/t-glibc-libunwind: Move to ../libgcc/config/ia64. * config/ia64/fde-glibc.c, config/ia64/fde-vms.c, config/ia64/unwind-ia64.c, config/ia64/unwind-ia64.h: Move to ../libgcc/config/ia64. * config/ia64/t-hpux (LIB2ADDEH): Remove. * config/ia64/t-ia64 (LIB2ADDEH): Remove. * config/ia64/t-vms (LIB2ADDEH): Remove. * config/ia64/vms.h (UNW_IVMS_MODE, MD_UNW_COMPATIBLE_PERSONALITY_P): Remove. * config/picochip/t-picochip (LIB2ADDEH): Remove. * config/rs6000/aix.h (R_LR, MD_FROB_UPDATE_CONTEXT): Remove. * config/rs6000/t-darwin (LIB2ADDEH): Remove. * config/rs6000/darwin-fallback.c: Move to ../libgcc/config/rs6000. * config/sh/t-sh ($(T)unwind-dw2-Os-4-200.o): Use $(srcdir)/../libgcc to refer to unwinder sources. * config/spu/t-spu-elf (LIB2ADDEH): Remove. * config/t-darwin (LIB2ADDEH): Remove. * config/t-freebsd (LIB2ADDEH): Remove. * config/t-libunwind (LIB2ADDEH, LIB2ADDEHSTATIC): Remove. * config/t-libunwind-elf: Move to ../libgcc/config. * config/t-linux (LIB2ADDEH): Remove. * config/t-sol2 (LIB2ADDEH): Remove. * config/xtensa/t-xtensa (LIB2ADDEH): Remove. * system.h (MD_FROB_UPDATE_CONTEXT): Poison. gcc/po: * EXCLUDES (unwind-c.c, unwind-dw2-fde-darwin.c) (unwind-dw2-fde-glibc.c, unwind-dw2-fde.c, unwind-dw2-fde.h) (unwind-dw2.c, unwind-pe.h, unwind-sjlj.c, unwind.h): Remove. libgcc: * Makefile.in (LIB2ADDEH, LIB2ADDEHSTATIC, LIB2ADDEHSHARED): New variables. (LIBUNWIND, SHLIBUNWIND_LINK, SHLIBUNWIND_INSTALL): New variables. (LIB2ADDEH, LIB2ADDEHSTATIC, LIB2ADDEHSHARED): Add $(srcdir)/emutls.c. (install-unwind_h): New target. (all): Depend on it. * config.host (unwind_header): New variable. (*-*-freebsd*): Set tmake_file to t-eh-dw2-dip. (*-*-linux*, frv-*-*linux*, *-*-kfreebsd*-gnu, *-*-knetbsd*-gnu, *-*-gnu*): Likewise, also for *-*-kopensolaris*-gnu. (*-*-solaris2*): Add t-eh-dw2-dip to tmake_file. (arm*-*-linux*): Add arm/t-bpabi for arm*-*-linux-*eabi. Set unwind_header. (arm*-*-uclinux*): Add arm/t-bpabi for arm*-*-uclinux*eabi. Set unwind_header. (arm*-*-eabi*, arm*-*-symbianelf*): Add arm/t-bpabi for arm*-*-eabi*. Add arm/t-symbian to tmake_file for arm*-*-symbianelf*. Set unwind_header. (ia64*-*-elf*): Add ia64/t-eh-ia64 to tmake_file. (ia64*-*-freebsd*): Likewise. (ia64*-*-linux*): Add ia64/t-glibc, ia64/t-eh-ia64, t-libunwind to tmake_file. Add t-libunwind-elf, ia64/t-glibc-libunwind unless $with_system_libunwind. (ia64*-*-hpux*): Set tmake_file. (ia64-hp-*vms*): Add ia64/t-eh-ia64 to tmake_file. (picochip-*-*): Set tmake_file. (rs6000-ibm-aix4.[3456789]*, powerpc-ibm-aix4.[3456789]*): Set md_unwind_header. (rs6000-ibm-aix5.1.*, powerpc-ibm-aix5.1.*): Likewise. (rs6000-ibm-aix[56789].*, powerpc-ibm-aix[56789].*): Likewise. (s390x-ibm-tpf*): Add t-eh-dw2-dip to tmake_file. (xtensa*-*-elf*): Set tmake_file. (xtensa*-*-linux*): Likewise. * configure.ac: Include ../config/unwind_ipinfo.m4. Call GCC_CHECK_UNWIND_GETIPINFO. Link unwind.h to $unwind_header. * configure: Regenerate. * emutls.c, unwind-c.c, unwind-compat.c, unwind-compat.h, unwind-dw2-fde-compat.c, unwind-dw2-fde-dip.c, unwind-dw2-fde.c, unwind-dw2-fde.h, unwind-dw2.c, unwind-dw2.h, unwind-generic.h, unwind-pe.h, unwind-sjlj.c, unwind.inc: New files. * config/unwind-dw2-fde-darwin.c: New file. * config/arm/libunwind.S, config/arm/pr-support.c, config/arm/t-bpabi, config/arm/t-symbian, config/arm/unwind-arm.c, config/arm/unwind-arm.h,: New files. * config/ia64/fde-glibc.c, config/ia64/fde-vms.c, config/ia64/t-eh-ia64, config/ia64/t-glibc, config/ia64/t-glibc-libunwind, config/ia64/t-hpux, config/ia64/t-vms, config/ia64/unwind-ia64.c, config/ia64/unwind-ia64.h: New files. * config/picochip/t-picochip: New file. * config/rs6000/aix-unwind.h, config/rs6000/darwin-fallback.c: New files. * config/rs6000/t-darwin (LIB2ADDEH): Set. * config/s390/t-tpf (LIB2ADDEH): Remove. * config/t-darwin (LIB2ADDEH): Set. * config/t-eh-dw2-dip: New file. * config/t-libunwind, config/t-libunwind-elf: New files. * config/t-sol2 (LIB2ADDEH): Remove. * config/xtensa/t-xtensa: New file. gcc/ada: * gcc-interface/Makefile.in (raise-gcc.o): Search $(srcdir)/../libgcc. libgo: * Makefile.am (AM_CFLAGS): Search $(srcdir)/../libgcc. * Makefile.in: Regenerate. libjava: * configure.ac (GCC_UNWIND_INCLUDE): Rename to LIBGCC_UNWIND_INCLUDE. Point to $(multi_basedir)/./libjava/../libgcc. * configure: Regenerate. * Makefile.am (GCC_UNWIND_INCLUDE): Reflect this. * Makefile.in: Regenerate. libobjc: * Makefile.in (INCLUDES): Search $(srcdir)/$(MULTISRCTOP)../libgcc. libstdc++-v3: * acinclude.m4 (GLIBCXX_EXPORT_INCLUDES): Point TOPLEVEL_INCLUDES to $(toplevel_srcdir)/libgcc. * configure: Regenerate. From-SVN: r177447
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