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Add support for x86_64-*-gnu-* targets to build x86_64 gnumach/hurd

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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/ChangeLog:
	* config.gcc: Recognize x86_64-*-gnu* targets and include
	i386/gnu64.h.
	* config/i386/gnu64.h: Define configuration for new target
	including ld.so location.

libgcc/ChangeLog:
	* config.host: Recognize x86_64-*-gnu* targets.
	* config/i386/gnu-unwind.h: Update to handle __x86_64__ with a
	TODO for now.

Signed-off-by: Flavio Cruz <flaviocruz@gmail.com>
This commit is contained in:
Flavio Cruz 2023-01-26 22:45:27 -05:00 • committed by Thomas Schwinge
parent 1472ba52f3
commit 5f8950b403
4 changed files with 61 additions and 2 deletions
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5
gcc/config.gcc
View file

@ -1971,7 +1971,7 @@ 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 ${target} in
@ -1982,6 +1982,9 @@ x86_64-*-linux* | x86_64-*-kfreebsd*-gnu)
x86_64-*-kfreebsd*-gnu)
tm_file="${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}"

40
gcc/config/i386/gnu64.h Normal file
View file

@ -0,0 +1,40 @@
/* Configuration for an x86_64 running GNU with ELF as the target machine. */
/*
Copyright (C) 2023 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

8
libgcc/config.host
View file

@ -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"

10
libgcc/config/i386/gnu-unwind.h
View file

@ -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 */