Re: [PATCH] Add support for x86_64-*-gnu-* targets to build x86_64 gnumach/hurd

["Flávio Cruz" <flaviocruz@gmail.com>]

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Friendly ping

On Mon, Dec 26, 2022 at 12:34 PM Flavio Cruz <flaviocruz@gmail.com> wrote:

> Tested by building a toolchain and compiling gnumach for x86_64 [1].
> This is the basic version without unwind support which I think is only
> required to
> implement exceptions.
>
> [1] https://github.com/flavioc/cross-hurd/blob/master/bootstrap-kernel.sh.
>
> ---
>  gcc/config.gcc                  |  5 ++++-
>  gcc/config/i386/gnu64.h         | 40 +++++++++++++++++++++++++++++++++
>  libgcc/config.host              |  8 ++++++-
>  libgcc/config/i386/gnu-unwind.h | 10 +++++++++
>  4 files changed, 61 insertions(+), 2 deletions(-)
>  create mode 100644 gcc/config/i386/gnu64.h
>
> diff --git a/gcc/config.gcc b/gcc/config.gcc
> index 95190233820..0e2b15768bf 100644
> --- a/gcc/config.gcc
> +++ b/gcc/config.gcc
> @@ -1955,7 +1955,7 @@ i[34567]86-*-linux* | i[34567]86-*-kfreebsd*-gnu |
> i[34567]86-*-gnu* | i[34567]8
>                 ;;
>         esac
>         ;;
> -x86_64-*-linux* | x86_64-*-kfreebsd*-gnu)
> +x86_64-*-linux* | x86_64-*-kfreebsd*-gnu | x86_64-*-gnu*)
>         tm_file="${tm_file} i386/unix.h i386/att.h elfos.h gnu-user.h
> glibc-stdint.h \
>                  i386/x86-64.h i386/gnu-user-common.h i386/gnu-user64.h"
>         case ${target} in
> @@ -1966,6 +1966,9 @@ x86_64-*-linux* | x86_64-*-kfreebsd*-gnu)
>         x86_64-*-kfreebsd*-gnu)
>                 tm_file="${tm_file} kfreebsd-gnu.h i386/kfreebsd-gnu64.h"
>                 ;;
> +       x86_64-*-gnu*)
> +               tm_file="${tm_file} gnu.h i386/gnu64.h"
> +               ;;
>         esac
>         tmake_file="${tmake_file} i386/t-linux64"
>         x86_multilibs="${with_multilib_list}"
> diff --git a/gcc/config/i386/gnu64.h b/gcc/config/i386/gnu64.h
> new file mode 100644
> index 00000000000..a1ecfaa1cdb
> --- /dev/null
> +++ b/gcc/config/i386/gnu64.h
> @@ -0,0 +1,40 @@
> +/* Configuration for an x86_64 running GNU with ELF as the target
> machine.  */
> +
> +/*
> +Copyright (C) 2022 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 of the License, 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.
> +
> +You should have received a copy of the GNU General Public License
> +along with GCC.  If not, see <http://www.gnu.org/licenses/>.
> +*/
> +
> +#define GNU_USER_LINK_EMULATION32 "elf_i386"
> +#define GNU_USER_LINK_EMULATION64 "elf_x86_64"
> +#define GNU_USER_LINK_EMULATIONX32 "elf32_x86_64"
> +
> +#undef GNU_USER_DYNAMIC_LINKER
> +#define GNU_USER_DYNAMIC_LINKER32 "/lib/ld.so.1"
> +#define GNU_USER_DYNAMIC_LINKER64 "/lib/ld-x86-64.so.1"
> +#define GNU_USER_DYNAMIC_LINKERX32 "/lib/ld-x32.so.1"
> +
> +#undef STARTFILE_SPEC
> +#if defined HAVE_LD_PIE
> +#define STARTFILE_SPEC \
> +  "%{!shared:
> %{pg|p|profile:%{static:gcrt0.o%s;:gcrt1.o%s};pie:Scrt1.o%s;static:crt0.o%s;:crt1.o%s}}
> \
> +   crti.o%s
> %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
> +#else
> +#define STARTFILE_SPEC \
> +  "%{!shared:
> %{pg|p|profile:%{static:gcrt0.o%s;:gcrt1.o%s};static:crt0.o%s;:crt1.o%s}} \
> +   crti.o%s
> %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
> +#endif
> diff --git a/libgcc/config.host b/libgcc/config.host
> index eb23abe89f5..75fd1b778fe 100644
> --- a/libgcc/config.host
> +++ b/libgcc/config.host
> @@ -751,6 +751,12 @@ x86_64-*-kfreebsd*-gnu)
>         tmake_file="${tmake_file} i386/t-crtpc t-crtfm i386/t-crtstuff
> t-dfprules"
>         tm_file="${tm_file} i386/elf-lib.h"
>         ;;
> +x86_64-*-gnu*)
> +       extra_parts="$extra_parts crtprec32.o crtprec64.o crtprec80.o
> crtfastmath.o"
> +       tmake_file="${tmake_file} i386/t-crtpc t-crtfm i386/t-crtstuff
> t-dfprules"
> +       tm_file="${tm_file} i386/elf-lib.h"
> +       md_unwind_header=i386/gnu-unwind.h
> +       ;;
>  i[34567]86-pc-msdosdjgpp*)
>         ;;
>  i[34567]86-*-lynxos*)
> @@ -1523,7 +1529,7 @@ esac
>  case ${host} in
>  i[34567]86-*-linux* | x86_64-*-linux* | \
>    i[34567]86-*-kfreebsd*-gnu | x86_64-*-kfreebsd*-gnu | \
> -  i[34567]86-*-gnu*)
> +  i[34567]86-*-gnu* | x86_64-*-gnu*)
>         tmake_file="${tmake_file} t-tls i386/t-linux i386/t-msabi
> t-slibgcc-libgcc"
>         if test "$libgcc_cv_cfi" = "yes"; then
>                 tmake_file="${tmake_file} t-stack i386/t-stack-i386"
> diff --git a/libgcc/config/i386/gnu-unwind.h
> b/libgcc/config/i386/gnu-unwind.h
> index 25eb690e370..2cbfc40ea7e 100644
> --- a/libgcc/config/i386/gnu-unwind.h
> +++ b/libgcc/config/i386/gnu-unwind.h
> @@ -30,6 +30,14 @@ see the files COPYING3 and COPYING.RUNTIME
> respectively.  If not, see
>
>  #include <signal.h>
>
> +#ifdef __x86_64__
> +
> +/*
> + * TODO: support for 64 bits needs to be implemented.
> + */
> +
> +#else /* ifdef __x86_64__  */
> +
>  #define MD_FALLBACK_FRAME_STATE_FOR x86_gnu_fallback_frame_state
>
>  static _Unwind_Reason_Code
> @@ -138,4 +146,6 @@ x86_gnu_fallback_frame_state
>    return _URC_NO_REASON;
>  }
>
> +#endif /* ifdef __x86_64__  */
> +
>  #endif /* ifndef inhibit_libc */
> --
> 2.35.1
>
>

-- 
Flávio Cruz / flaviocruz@gmail.com