On Tue, Jan 20, 2015 at 10:58 AM, Jakub Jelinek <ja...@redhat.com> wrote:
>> >>> The target is i386-pc-solaris2.10, which includes i386/sysv4.h. Only
>> >>> the amd64 crtbegin.o is affected, the i386 one is fine.
>> >>
>> >> Please split sysv4-common.h out of i386/sysv4.h, similar to how
>> >> i386/gnu-user.h and gnu-user-common.h are split.
>> >
>> > This would break Solaris/SPARC (there's no sparc/sysv4-common.h), and
>> > only works on Linux/x86 by accident:
>> >
>> > * CRT_GET_RFIB_DATA is only defined in i386/gnu-user.h there, but that
>> > file is only included for 32-bit-only configurations, not
>> > 32-bit-default ones (--enable-targets=all). In the latter case, the
>> > macro is not defined for the 32-bit multilib, where it should be.
>> >
>> > * CRT_GET_RFIB_DATA is only used in libgcc/crtstuff.c and
>> > libgcc/unwind-dw2-fde-dip.c (which already has a workaround for it
>> > being incorrectly defined for 64-bit Solaris/x86).
>> >
>> > IMO, the definition has no business living in gcc/config/i386 at all,
>> > but should move to libgcc/config instead (together with the one in
>> > frv/frv.h). That being probably too intrusive at this stage, I think
>> > the best workaround for now is to simply wrap the definition in
>> > i386/syv4.h (which is Solaris/x86-only anyway) in __i386__.
>>
>> Ugh...
>>
>> Considering your explanation and the mess in the unwinder, IMO this
>> should be fixed in the correct way even at this stage.
>>
>> CC RMs for their opinion.
>
> Agreed.
I'm testing the attached patch that moves the definition to libgcc
*and* wraps it in __i386__ to fix multilibs. Rainer, can you please
implement the fix for the Solaris/x86, presumably in the same way?
libgcc/ChangeLog:
2015-23-01 Uros Bizjak <ubiz...@gmail.com>
* config/i386/gnu-user-lib.h New file.
(CRT_GET_RFIB_DATA): Move definition from gcc/config/i386/gnu-user.h.
Wrap definition in #ifdef __i386__.
* libgcc/config.host (i[34567]86-*-linux*, i[34567]86-*-kfreebsd*-gnu,
i[34567]86-*-knetbsd*-gnu, i[34567]86-*-gnu*,
i[34567]86-*-kopensolaris*-gnu, x86_64-*-linux*,
x86_64-*-kfreebsd*-gnu, x86_64-*-knetbsd*-gnu): Add i386/gnu-user-lib.h
to tm_file.
gcc/ChangeLog:
2015-23-01 Uros Bizjak <ubiz...@gmail.com>
* config/i386/gnu-user.h (CRT_GET_RFIB_DATA): Move definition to
libgcc/config/i386/gnu-user-lib.h.
Bootstrap and regression test on x86_64-linux-gnu {,-m32} in progress.
Uros.
Index: libgcc/config.host
===================================================================
--- libgcc/config.host (revision 220027)
+++ libgcc/config.host (working copy)
@@ -585,20 +585,24 @@
i[34567]86-*-linux*)
extra_parts="$extra_parts crtprec32.o crtprec64.o crtprec80.o
crtfastmath.o"
tmake_file="${tmake_file} i386/t-crtpc i386/t-crtfm i386/t-crtstuff
t-dfprules"
+ tm_file="${tm_file} i386/gnu-user-lib.h"
md_unwind_header=i386/linux-unwind.h
;;
i[34567]86-*-kfreebsd*-gnu | i[34567]86-*-knetbsd*-gnu | i[34567]86-*-gnu* |
i[34567]86-*-kopensolaris*-gnu)
extra_parts="$extra_parts crtprec32.o crtprec64.o crtprec80.o
crtfastmath.o"
tmake_file="${tmake_file} i386/t-crtpc i386/t-crtfm i386/t-crtstuff
t-dfprules"
+ tm_file="${tm_file} i386/gnu-user-lib.h"
;;
x86_64-*-linux*)
extra_parts="$extra_parts crtprec32.o crtprec64.o crtprec80.o
crtfastmath.o"
tmake_file="${tmake_file} i386/t-crtpc i386/t-crtfm i386/t-crtstuff
t-dfprules"
+ tm_file="${tm_file} i386/gnu-user-lib.h"
md_unwind_header=i386/linux-unwind.h
;;
x86_64-*-kfreebsd*-gnu | x86_64-*-knetbsd*-gnu)
extra_parts="$extra_parts crtprec32.o crtprec64.o crtprec80.o
crtfastmath.o"
tmake_file="${tmake_file} i386/t-crtpc i386/t-crtfm i386/t-crtstuff
t-dfprules"
+ tm_file="${tm_file} i386/gnu-user-lib.h"
;;
i[34567]86-pc-msdosdjgpp*)
;;
Index: libgcc/config/i386/gnu-user-lib.h
===================================================================
--- libgcc/config/i386/gnu-user-lib.h (revision 0)
+++ libgcc/config/i386/gnu-user-lib.h (revision 0)
@@ -0,0 +1,36 @@
+/* Definitions for Intel 386 systems using GNU userspace.
+ Copyright (C) 2015 Free Software Foundation, Inc.
+
+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/>. */
+
+#ifdef __i386__
+/* Used by crtstuff.c to initialize the base of data-relative relocations.
+ These are GOT relative on x86, so return the pic register. */
+#define CRT_GET_RFIB_DATA(BASE)
\
+ __asm__ ("call\t.LPR%=\n" \
+ ".LPR%=:\n\t" \
+ "pop{l}\t%0\n\t" \
+ /* Due to a GAS bug, this cannot use EAX. That encodes \
+ smaller than the traditional EBX, which results in the \
+ offset being off by one. */ \
+ "add{l}\t{$_GLOBAL_OFFSET_TABLE_+[.-.LPR%=],%0" \
+ "|%0,_GLOBAL_OFFSET_TABLE_+(.-.LPR%=)}" \
+ : "=d"(BASE))
+#endif
Index: gcc/config/i386/gnu-user.h
===================================================================
--- gcc/config/i386/gnu-user.h (revision 220027)
+++ gcc/config/i386/gnu-user.h (working copy)
@@ -129,19 +129,6 @@
}
\
} while (0)
-/* Used by crtstuff.c to initialize the base of data-relative relocations.
- These are GOT relative on x86, so return the pic register. */
-#define CRT_GET_RFIB_DATA(BASE)
\
- __asm__ ("call\t.LPR%=\n" \
- ".LPR%=:\n\t" \
- "pop{l}\t%0\n\t" \
- /* Due to a GAS bug, this cannot use EAX. That encodes \
- smaller than the traditional EBX, which results in the \
- offset being off by one. */ \
- "add{l}\t{$_GLOBAL_OFFSET_TABLE_+[.-.LPR%=],%0" \
- "|%0,_GLOBAL_OFFSET_TABLE_+(.-.LPR%=)}" \
- : "=d"(BASE))
-
#ifdef TARGET_LIBC_PROVIDES_SSP
/* i386 glibc provides __stack_chk_guard in %gs:0x14. */
#define TARGET_THREAD_SSP_OFFSET 0x14
