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Darwin: Rework handling for unwinder code in libgcc_s and specs [PR80556].

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This addresses a long-standing problem where a work-around for an unwinder
issue (also a regression) regresses other functionality.  The patch replaces
several work-arounds with a fix for PR80556 and a work-around for PR88590.

* The fix for PR80556 requires a bump to the SO name for libgcc_s, since we
need to remove the unwinder symbols from it.  This would trigger PR88590
hence the work-around for that.

* We weaken the symbols for emulated TLS support so that it is possible
for a DSO linked with static-libgcc to interoperate with a DSO linked with
libgcc_s.  Likewise main exes.

* We remove all the gcc-4.2.1 era stubs machinery and workarounds.

* libgcc is always now linked ahead of libc, which avoids fails where the
libc (libSystem) builtins implementations are not up to date.

* The unwinder now always comes from the system
 - for Darwin9 from /usr/lib/libgcc_s.1.dylib
 - for Darwin10 from /usr/lib/libSystem.dylib
 - for Darwin11+ from /usr/lib/system/libunwind.dylib.

 We still insert a shim on Darwin10 to fix an omitted unwind function, but
 the underlying unwinder remains the system one.

* The work-around for PR88590 has two parts (1) we always link libgcc from
its convenience lib on affected system versions (avoiding the need to find
the DSO path); (2) we add and export the emutls functions from DSOs - this
makes a relatively small (20k) addition to a DSO.  These can be backed out
when a proper fix for PR88590 is committed.

For distributions that wish to install a libgcc_s.1.dylib to satisfy linkage
from exes that linked against the stubs can use a reexported libgcc_s.1.1
(since that contains all the symbols that were previously exported via the
 stubs).

Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>

gcc/ChangeLog:

	PR target/80556
	* config/darwin-driver.c (darwin_driver_init): Handle exported
	symbols and symbol lists (suppress automatic export of the TLS
	symbols).
	* config/darwin.c (darwin_rename_builtins): Remove workaround.
	* config/darwin.h (LINK_GCC_C_SEQUENCE_SPEC): Likewise.
	(REAL_LIBGCC_SPEC): Handle revised library uses.
	* config/darwin.opt (nodefaultexport): New.
	* config/i386/darwin.h (PR80556_WORKAROUND): Remove.
	* config/i386/darwin32-biarch.h (PR80556_WORKAROUND): Likewise.
	* config/i386/darwin64-biarch.h (PR80556_WORKAROUND): Likewise.

libgcc/ChangeLog:

	* config.host: Add weak emutls crt to the extra_parts.
	* config/i386/darwin-lib.h (DECLARE_LIBRARY_RENAMES): Remove
	workaround.
	* config/libgcc-libsystem.ver: Add exclude list for the system-
	provided unwinder.
	* config/t-slibgcc-darwin: Bump SO version, remove stubs code.
	* config/i386/libgcc-darwin.10.4.ver: Removed.
	* config/i386/libgcc-darwin.10.5.ver: Removed.
	* config/rs6000/libgcc-darwin.10.4.ver: Removed.
	* config/rs6000/libgcc-darwin.10.5.ver: Removed.
	* config/t-darwin-noeh: New file.

gcc/testsuite/ChangeLog:

	* gcc.dg/torture/fp-int-convert-timode-3.c: Remove XFAIL.
	* gcc.dg/torture/fp-int-convert-timode-4.c: Likewise.
This commit is contained in:
Iain Sandoe 2021-09-20 18:41:56 +01:00
parent b9873b4e2c
commit d4943ce939
18 changed files with 155 additions and 583 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
gcc/config/darwin-driver.c
View file

@ -281,6 +281,7 @@ darwin_driver_init (unsigned int *decoded_options_count,
const char *vers_string = NULL;
bool seen_version_min = false;
bool seen_sysroot_p = false;
bool noexport_p = true;
for (i = 1; i < *decoded_options_count; i++)
{
@ -349,6 +350,13 @@ darwin_driver_init (unsigned int *decoded_options_count,
seen_sysroot_p = true;
break;
case OPT_Xlinker:
case OPT_Wl_:
gcc_checking_assert ((*decoded_options)[i].arg);
if (startswith ((*decoded_options)[i].arg, "-exported_symbol"))
noexport_p = false;
break;
default:
break;
}
@ -474,4 +482,14 @@ darwin_driver_init (unsigned int *decoded_options_count,
&(*decoded_options)[*decoded_options_count - 1]);
}
}
if (noexport_p)
{
++*decoded_options_count;
*decoded_options = XRESIZEVEC (struct cl_decoded_option,
*decoded_options,
*decoded_options_count);
generate_option (OPT_nodefaultexport, NULL, 1, CL_DRIVER,
&(*decoded_options)[*decoded_options_count - 1]);
}
}

24
gcc/config/darwin.c
View file

@ -3637,30 +3637,6 @@ darwin_fold_builtin (tree fndecl, int n_args, tree *argp,
void
darwin_rename_builtins (void)
{
/* The system ___divdc3 routine in libSystem on darwin10 is not
accurate to 1ulp, ours is, so we avoid ever using the system name
for this routine and instead install a non-conflicting name that
is accurate.
When -ffast-math or -funsafe-math-optimizations is given, we can
use the faster version. */
if (!flag_unsafe_math_optimizations)
{
enum built_in_function dcode
= (enum built_in_function)(BUILT_IN_COMPLEX_DIV_MIN
+ DCmode - MIN_MODE_COMPLEX_FLOAT);
tree fn = builtin_decl_explicit (dcode);
/* Fortran and c call TARGET_INIT_BUILTINS and
TARGET_INIT_LIBFUNCS at different times, so we have to put a
call into each to ensure that at least one of them is called
after build_common_builtin_nodes. A better fix is to add a
new hook to run after build_common_builtin_nodes runs. */
if (fn)
set_user_assembler_name (fn, "___ieee_divdc3");
fn = builtin_decl_implicit (dcode);
if (fn)
set_user_assembler_name (fn, "___ieee_divdc3");
}
}
/* Implementation for the TARGET_LIBC_HAS_FUNCTION hook. */

94
gcc/config/darwin.h
View file

@ -378,6 +378,16 @@ extern GTY(()) int darwin_ms_struct;
%(link_ssp) \
%:version-compare(>< 10.6 10.7 mmacosx-version-min= -ld10-uwfef) \
%(link_gcc_c_sequence) \
%{!nodefaultexport:%{dylib|dynamiclib|bundle: \
%:version-compare(>= 10.11 asm_macosx_version_min= -U) \
%:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_get_address) \
%:version-compare(>= 10.11 asm_macosx_version_min= -exported_symbol) \
%:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_get_address) \
%:version-compare(>= 10.11 asm_macosx_version_min= -U) \
%:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_register_common) \
%:version-compare(>= 10.11 asm_macosx_version_min= -exported_symbol) \
%:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_register_common) \
}} \
}}}\
%{!r:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} "\
DARWIN_PIE_SPEC \
@ -404,14 +414,11 @@ extern GTY(()) int darwin_ms_struct;
/* Tell collect2 to run dsymutil for us as necessary. */
#define COLLECT_RUN_DSYMUTIL 1
/* Fix PR47558 by linking against libSystem ahead of libgcc. See also
PR 80556 and the fallout from this. */
/* We only want one instance of %G, since libSystem (Darwin's -lc) does not
depend on libgcc. */
#undef LINK_GCC_C_SEQUENCE_SPEC
#define LINK_GCC_C_SEQUENCE_SPEC \
"%{!static:%{!static-libgcc: \
%:version-compare(>= 10.6 mmacosx-version-min= -lSystem) } } \
%G %{!nolibc:%L}"
"%G %{!nolibc:%L} "
/* ld64 supports a sysroot, it just has a different name and there's no easy
way to check for it at config time. */
@ -456,37 +463,62 @@ extern GTY(()) int darwin_ms_struct;
#define LIB_SPEC "%{!static:-lSystem}"
/* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
libraries to link against, and by not linking against libgcc_s on
earlier-than-10.3.9. If we need exceptions, prior to 10.3.9, then we have
to link the static eh lib, since there's no shared version on the system.
Note that by default, except as above, -lgcc_eh is not linked against.
/*
Note that by default, -lgcc_eh is not linked against.
This is because,in general, we need to unwind through system libraries that
are linked with the shared unwinder in libunwind (or libgcc_s for 10.4/5).
The static version of the current libgcc unwinder (which differs from the
implementation in libunwind.dylib on systems Darwin10 [10.6]+) can be used
by specifying -static-libgcc.
For -static-libgcc: < 10.6, use the unwinder in libgcc_eh (and find
the emultls impl. there too).
If libgcc_eh is linked against, it has to be before -lgcc, because it might
need symbols from -lgcc. */
For -static-libgcc: >= 10.6, the unwinder *still* comes from libSystem and
we find the emutls impl from lemutls_w. In either case, the builtins etc.
are linked from -lgcc.
When we have specified shared-libgcc or any case that might require
exceptions, we pull the libgcc content (including emulated tls) from
-lgcc_s.1 in GCC and the unwinder from /usr/lib/libgcc_s.1 for < 10.6 and
libSystem for >= 10.6 respectively.
Otherwise, we just link the emutls/builtins from convenience libs.
If we need exceptions, prior to 10.3.9, then we have to link the static
eh lib, since there's no shared version on the system.
In all cases, libgcc_s.1 will be installed with the compiler, or any app
built using it, so we can link the builtins and emutls shared on all.
We have to work around that DYLD_XXXX are disabled in macOS 10.11+ which
means that any bootstrap trying to use a shared libgcc with a bumped SO-
name will fail. This means that we do not accept shared libgcc for these
versions.
For -static-libgcc: >= 10.6, the unwinder *still* comes from libSystem and
we find the emutls impl from lemutls_w. In either case, the builtins etc.
are linked from -lgcc.
>
Otherwise, we just link the shared version of gcc_s.1.1 and pick up
exceptions:
* Prior to 10.3.9, then we have to link the static eh lib, since there
is no shared version on the system.
* from 10.3.9 to 10.5, from /usr/lib/libgcc_s.1.dylib
* from 10.6 onwards, from libSystem.dylib
In all cases, libgcc_s.1.1 will be installed with the compiler, or any app
built using it, so we can link the builtins and emutls shared on all.
*/
#undef REAL_LIBGCC_SPEC
#define REAL_LIBGCC_SPEC \
"%{static-libgcc|static: -lgcc_eh -lgcc; \
shared-libgcc|fexceptions|fobjc-exceptions|fgnu-runtime: \
%:version-compare(!> 10.3.9 mmacosx-version-min= -lgcc_eh) \
%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
%:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \
%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
%:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \
-lgcc ; \
:%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
%:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \
%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
%:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \
-lgcc }"
#define REAL_LIBGCC_SPEC \
"%{static-libgcc|static: \
%:version-compare(!> 10.6 mmacosx-version-min= -lgcc_eh) \
%:version-compare(>= 10.6 mmacosx-version-min= -lemutls_w); \
shared-libgcc|fexceptions|fobjc-exceptions|fgnu-runtime: \
%:version-compare(!> 10.11 mmacosx-version-min= -lgcc_s.1.1) \
%:version-compare(>= 10.11 mmacosx-version-min= -lemutls_w) \
%:version-compare(!> 10.3.9 mmacosx-version-min= -lgcc_eh) \
%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
%:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5); \
: -lemutls_w \
} -lgcc "
/* We specify crt0.o as -lcrt0.o so that ld will search the library path. */

4
gcc/config/darwin.opt
View file

@ -233,6 +233,10 @@ no_dead_strip_inits_and_terms
Driver RejectNegative
(Obsolete) Current linkers never dead-strip these items, so the option is not needed.
nodefaultexport
Driver RejectNegative
Do not add a default symbol exports to modules or dynamic libraries.
nofixprebinding
Driver RejectNegative
(Obsolete after 10.3.9) Set MH_NOPREFIXBINDING, in an executable.

31
gcc/config/i386/darwin.h
View file

@ -25,37 +25,6 @@ along with GCC; see the file COPYING3. If not see
#undef DARWIN_X86
#define DARWIN_X86 1
/* WORKAROUND pr80556:
For x86_64 Darwin10 and later, the unwinder is in libunwind (redirected
from libSystem). This doesn't use the keymgr (see keymgr.c) and therefore
the calls that libgcc makes to obtain the KEYMGR_GCC3_DW2_OBJ_LIST are not
updated to include new images, and might not even be valid for a single
image.
Therefore, for 64b exes at least, we must use the libunwind implementation,
even when static-libgcc is specified. We put libSystem first so that
unwinder symbols are satisfied from there.
We default to 64b for single-arch builds, so apply this unconditionally. */
#ifndef PR80556_WORKAROUND
#define PR80556_WORKAROUND \
" %:version-compare(>= 10.6 mmacosx-version-min= -lSystem) "
#endif
#undef REAL_LIBGCC_SPEC
#define REAL_LIBGCC_SPEC \
"%{static-libgcc|static: " \
PR80556_WORKAROUND \
" -lgcc_eh -lgcc; \
shared-libgcc|fexceptions|fgnu-runtime: \
%:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
%:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \
%:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
%:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \
-lgcc ; \
:%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
%:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \
%:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
%:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \
-lgcc }"
/* Size of the Obj-C jump buffer. */
#define OBJC_JBLEN ((TARGET_64BIT) ? ((9 * 2) + 3 + 16) : (18))

13
gcc/config/i386/darwin32-biarch.h
View file

@ -24,19 +24,6 @@ along with GCC; see the file COPYING3. If not see
#define TARGET_64BIT_DEFAULT 0
#define TARGET_BI_ARCH 1
/* WORKAROUND pr80556:
For x86_64 Darwin10 and later, the unwinder is in libunwind (redirected
from libSystem). This doesn't use the keymgr (see keymgr.c) and therefore
the calls that libgcc makes to obtain the KEYMGR_GCC3_DW2_OBJ_LIST are not
updated to include new images, and might not even be valid for a single
image.
Therefore, for 64b exes at least, we must use the libunwind implementation,
even when static-libgcc is specified. We put libSystem first so that
unwinder symbols are satisfied from there. */
#undef PR80556_WORKAROUND
#define PR80556_WORKAROUND \
" %{m64:%:version-compare(>= 10.6 mmacosx-version-min= -lSystem)} "
#undef DARWIN_SUBARCH_SPEC
#define DARWIN_SUBARCH_SPEC DARWIN_ARCH_SPEC

13
gcc/config/i386/darwin64-biarch.h
View file

@ -25,19 +25,6 @@ along with GCC; see the file COPYING3. If not see
#define TARGET_64BIT_DEFAULT (OPTION_MASK_ISA_64BIT | OPTION_MASK_ABI_64)
#define TARGET_BI_ARCH 1
/* WORKAROUND pr80556:
For x86_64 Darwin10 and later, the unwinder is in libunwind (redirected
from libSystem). This doesn't use the keymgr (see keymgr.c) and therefore
the calls that libgcc makes to obtain the KEYMGR_GCC3_DW2_OBJ_LIST are not
updated to include new images, and might not even be valid for a single
image.
Therefore, for 64b exes at least, we must use the libunwind implementation,
even when static-libgcc is specified. We put libSystem first so that
unwinder symbols are satisfied from there. */
#undef PR80556_WORKAROUND
#define PR80556_WORKAROUND \
" %{!m32:%:version-compare(>= 10.6 mmacosx-version-min= -lSystem)} "
#undef DARWIN_SUBARCH_SPEC
#define DARWIN_SUBARCH_SPEC DARWIN_ARCH_SPEC

1
gcc/testsuite/gcc.dg/torture/fp-int-convert-timode-3.c
View file

@ -4,7 +4,6 @@
/* { dg-require-effective-target int128 } */
/* { dg-require-effective-target fenv } */
/* { dg-options "-frounding-math" } */
/* { dg-xfail-run-if "see PR80556 c63" { x86_64-*-darwin* i68?-*-darwin* } { "*" } { "" } } */
#include <fenv.h>
#include <stdlib.h>

1
gcc/testsuite/gcc.dg/torture/fp-int-convert-timode-4.c
View file

@ -4,7 +4,6 @@
/* { dg-require-effective-target int128 } */
/* { dg-require-effective-target fenv } */
/* { dg-options "-frounding-math" } */
/* { dg-xfail-run-if "see PR80556 c63" { x86_64-*-darwin* i68?-*-darwin* } { "*" } { "" } } */
#include <fenv.h>
#include <stdlib.h>

7
libgcc/config.host
View file

@ -214,8 +214,11 @@ esac
case ${host} in
*-*-darwin*)
asm_hidden_op=.private_extern
tmake_file="$tmake_file t-darwin ${cpu_type}/t-darwin t-libgcc-pic t-slibgcc-darwin"
extra_parts="crt3.o libd10-uwfef.a crttms.o crttme.o"
tmake_file="$tmake_file t-darwin ${cpu_type}/t-darwin t-libgcc-pic"
extra_parts="crt3.o libd10-uwfef.a crttms.o crttme.o libemutls_w.a"
# The unwinder is provided by the system shared libraries, do not add one
# to the shared libgcc.
tmake_file="$tmake_file t-darwin-noeh t-slibgcc-darwin"
;;
*-*-dragonfly*)
tmake_file="$tmake_file t-crtstuff-pic t-libgcc-pic t-eh-dw2-dip"

9
libgcc/config/i386/darwin-lib.h
View file

@ -22,13 +22,4 @@ 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/>. */
/* The system ___divdc3 routine in libSystem on darwin10 is not
accurate to 1ulp, ours is, so we avoid ever using the system name
for this routine and instead install a non-conflicting name that is
accurate. See darwin_rename_builtins. */
#ifdef L_divdc3
#define DECLARE_LIBRARY_RENAMES \
asm(".text; ___divdc3: jmp ___ieee_divdc3 ; .globl ___divdc3");
#endif
extern void * _darwin10_Unwind_FindEnclosingFunction (void *);

98
libgcc/config/i386/libgcc-darwin.10.4.ver
View file

@ -1,98 +0,0 @@
# Copyright (C) 2005-2021 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.
#
# You should have received a copy of the GNU General Public License
# along with GCC; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>.
__Unwind_Backtrace
__Unwind_DeleteException
__Unwind_FindEnclosingFunction
__Unwind_Find_FDE
__Unwind_ForcedUnwind
__Unwind_GetCFA
__Unwind_GetDataRelBase
__Unwind_GetGR
__Unwind_GetIP
__Unwind_GetLanguageSpecificData
__Unwind_GetRegionStart
__Unwind_GetTextRelBase
__Unwind_RaiseException
__Unwind_Resume
__Unwind_Resume_or_Rethrow
__Unwind_SetGR
__Unwind_SetIP
___absvdi2
___absvsi2
___addvdi3
___addvsi3
___ashldi3
___ashrdi3
___clear_cache
___clzdi2
___clzsi2
___cmpdi2
___ctzdi2
___ctzsi2
___deregister_frame
___deregister_frame_info
___deregister_frame_info_bases
___divdc3
___divdi3
___divsc3
___divxc3
___enable_execute_stack
___ffsdi2
___fixdfdi
___fixsfdi
___fixunsdfdi
___fixunsdfsi
___fixunssfdi
___fixunssfsi
___fixunsxfdi
___fixunsxfsi
___fixxfdi
___floatdidf
___floatdisf
___floatdixf
___gcc_personality_v0
___lshrdi3
___moddi3
___muldc3
___muldi3
___mulsc3
___mulvdi3
___mulvsi3
___mulxc3
___negdi2
___negvdi2
___negvsi2
___paritydi2
___paritysi2
___popcountdi2
___popcountsi2
___powidf2
___powisf2
___powixf2
___register_frame
___register_frame_info
___register_frame_info_bases
___register_frame_info_table
___register_frame_info_table_bases
___register_frame_table
___subvdi3
___subvsi3
___ucmpdi2
___udivdi3
___udivmoddi4
___umoddi3

102
libgcc/config/i386/libgcc-darwin.10.5.ver
View file

@ -1,102 +0,0 @@
# Copyright (C) 2005-2021 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.
#
# You should have received a copy of the GNU General Public License
# along with GCC; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>.
__Unwind_Backtrace
__Unwind_DeleteException
__Unwind_FindEnclosingFunction
__Unwind_Find_FDE
__Unwind_ForcedUnwind
__Unwind_GetCFA
__Unwind_GetDataRelBase
__Unwind_GetGR
__Unwind_GetIP
__Unwind_GetIPInfo
__Unwind_GetLanguageSpecificData
__Unwind_GetRegionStart
__Unwind_GetTextRelBase
__Unwind_RaiseException
__Unwind_Resume
__Unwind_Resume_or_Rethrow
__Unwind_SetGR
__Unwind_SetIP
___absvdi2
___absvsi2
___addvdi3
___addvsi3
___ashldi3
___ashrdi3
___clear_cache
___clzdi2
___clzsi2
___cmpdi2
___ctzdi2
___ctzsi2
___deregister_frame
___deregister_frame_info
___deregister_frame_info_bases
___divdc3
___divdi3
___divsc3
___divxc3
___enable_execute_stack
___ffsdi2
___fixdfdi
___fixsfdi
___fixunsdfdi
___fixunsdfsi
___fixunssfdi
___fixunssfsi
___fixunsxfdi
___fixunsxfsi
___fixxfdi
___floatdidf
___floatdisf
___floatdixf
___floatundidf
___floatundisf
___floatundixf
___gcc_personality_v0
___lshrdi3
___moddi3
___muldc3
___muldi3
___mulsc3
___mulvdi3
___mulvsi3
___mulxc3
___negdi2
___negvdi2
___negvsi2
___paritydi2
___paritysi2
___popcountdi2
___popcountsi2
___powidf2
___powisf2
___powixf2
___register_frame
___register_frame_info
___register_frame_info_bases
___register_frame_info_table
___register_frame_info_table_bases
___register_frame_table
___subvdi3
___subvsi3
___ucmpdi2
___udivdi3
___udivmoddi4
___umoddi3

38
libgcc/config/libgcc-libsystem.ver
View file

@ -1 +1,37 @@
_darwin10_Unwind_FindEnclosingFunction
# We must use the unwinder provided by the OS, even if that has
# limitations or bug, so exclude the libgcc_s symbols.
%exclude {
_Unwind_DeleteException
_Unwind_Find_FDE
_Unwind_ForcedUnwind
_Unwind_GetGR
_Unwind_GetIP
_Unwind_GetLanguageSpecificData
_Unwind_GetRegionStart
_Unwind_GetTextRelBase
_Unwind_GetDataRelBase
_Unwind_RaiseException
_Unwind_Resume
_Unwind_SetGR
_Unwind_SetIP
_Unwind_SjLj_Register
_Unwind_SjLj_Unregister
_Unwind_SjLj_RaiseException
_Unwind_SjLj_ForcedUnwind
_Unwind_SjLj_Resume
_Unwind_FindEnclosingFunction
_Unwind_GetCFA
_Unwind_Backtrace
_Unwind_Resume_or_Rethrow
_Unwind_SjLj_Resume_or_Rethrow
_Unwind_GetIPInfo
__register_frame
__register_frame_table
__deregister_frame
__register_frame_info
__deregister_frame_info
__frame_state_for
__register_frame_info_table
}

93
libgcc/config/rs6000/libgcc-darwin.10.4.ver
View file

@ -1,93 +0,0 @@
# Copyright (C) 2005-2021 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.
#
# You should have received a copy of the GNU General Public License
# along with GCC; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>.
__Unwind_Backtrace
__Unwind_DeleteException
__Unwind_FindEnclosingFunction
__Unwind_Find_FDE
__Unwind_ForcedUnwind
__Unwind_GetCFA
__Unwind_GetDataRelBase
__Unwind_GetGR
__Unwind_GetIP
__Unwind_GetLanguageSpecificData
__Unwind_GetRegionStart
__Unwind_GetTextRelBase
__Unwind_RaiseException
__Unwind_Resume
__Unwind_Resume_or_Rethrow
__Unwind_SetGR
__Unwind_SetIP
___absvdi2
___absvsi2
___addvdi3
___addvsi3
___ashldi3
___ashrdi3
___clear_cache
___clzdi2
___clzsi2
___cmpdi2
___ctzdi2
___ctzsi2
___deregister_frame
___deregister_frame_info
___deregister_frame_info_bases
___divdi3
___enable_execute_stack
___ffsdi2
___fixdfdi
___fixsfdi
___fixtfdi
___fixunsdfdi
___fixunsdfsi
___fixunssfdi
___fixunssfsi
___fixunstfdi
___floatdidf
___floatdisf
___floatditf
___gcc_personality_v0
___gcc_qadd
___gcc_qdiv
___gcc_qmul
___gcc_qsub
___lshrdi3
___moddi3
___muldi3
___mulvdi3
___mulvsi3
___negdi2
___negvdi2
___negvsi2
___paritydi2
___paritysi2
___popcountdi2
___popcountsi2
___register_frame
___register_frame_info
___register_frame_info_bases
___register_frame_info_table
___register_frame_info_table_bases
___register_frame_table
___subvdi3
___subvsi3
___trampoline_setup
___ucmpdi2
___udivdi3
___udivmoddi4
___umoddi3

106
libgcc/config/rs6000/libgcc-darwin.10.5.ver
View file

@ -1,106 +0,0 @@
# Copyright (C) 2005-2021 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.
#
# You should have received a copy of the GNU General Public License
# along with GCC; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>.
__Unwind_Backtrace
__Unwind_DeleteException
__Unwind_FindEnclosingFunction
__Unwind_Find_FDE
__Unwind_ForcedUnwind
__Unwind_GetCFA
__Unwind_GetDataRelBase
__Unwind_GetGR
__Unwind_GetIP
__Unwind_GetIPInfo
__Unwind_GetLanguageSpecificData
__Unwind_GetRegionStart
__Unwind_GetTextRelBase
__Unwind_RaiseException
__Unwind_Resume
__Unwind_Resume_or_Rethrow
__Unwind_SetGR
__Unwind_SetIP
___absvdi2
___absvsi2
___addvdi3
___addvsi3
___ashldi3
___ashrdi3
___clear_cache
___clzdi2
___clzsi2
___cmpdi2
___ctzdi2
___ctzsi2
___deregister_frame
___deregister_frame_info
___deregister_frame_info_bases
___divdc3
___divdi3
___divsc3
___divtc3
___enable_execute_stack
___ffsdi2
___fixdfdi
___fixsfdi
___fixtfdi
___fixunsdfdi
___fixunsdfsi
___fixunssfdi
___fixunssfsi
___fixunstfdi
___floatdidf
___floatdisf
___floatditf
___floatundidf
___floatundisf
___floatunditf
___gcc_personality_v0
___gcc_qadd
___gcc_qdiv
___gcc_qmul
___gcc_qsub
___lshrdi3
___moddi3
___muldc3
___muldi3
___mulsc3
___multc3
___mulvdi3
___mulvsi3
___negdi2
___negvdi2
___negvsi2
___paritydi2
___paritysi2
___popcountdi2
___popcountsi2
___powidf2
___powisf2
___powitf2
___register_frame
___register_frame_info
___register_frame_info_bases
___register_frame_info_table
___register_frame_info_table_bases
___register_frame_table
___subvdi3
___subvsi3
___trampoline_setup
___ucmpdi2
___udivdi3
___udivmoddi4
___umoddi3

4
libgcc/config/t-darwin-noeh Normal file
View file

@ -0,0 +1,4 @@
# Most Darwin versions get their unwinder from libSystem.
# so remove the unwinder from the shared lib.
# We still need it in the _eh.a for Darwin8/9.
LIB2ADDEHSHARED =

82
libgcc/config/t-slibgcc-darwin
View file

@ -1,43 +1,34 @@
# Build a shared libgcc library with the darwin linker.
SHLIB_SOVERSION = 1
SHLIB_VERSTRING = -compatibility_version $(SHLIB_SOVERSION) -current_version $(SHLIB_SOVERSION).0
SHLIB_EXT = .dylib
SHLIB_INSTALL_NAME = @shlib_base_name@.$(SHLIB_SOVERSION)$(SHLIB_EXT)
SHLIB_SONAME = @shlib_base_name@$(SHLIB_EXT)
SHLIB_SOLINK = @shlib_base_name@.so
SHLIB_MAP = @shlib_map_file@
SHLIB_OBJS = @shlib_objs@
SHLIB_DIR = @multilib_dir@
SHLIB_LC = -lc
# Darwin only searches in /usr/lib for shared libraries, not in subdirectories,
# so the libgcc variants have different names not different locations.
# Note that this version is used for the loader, not the linker; the linker
# uses the stub versions named by the versioned members of $(INSTALL_FILES).
SHLIB_SOVERSION = 1.1
SHLIB_SO_MINVERSION = 1
SHLIB_VERSTRING = -compatibility_version $(SHLIB_SO_MINVERSION) -current_version $(SHLIB_SOVERSION)
SHLIB_EXT = .dylib
SHLIB_LC = -lSystem
# Shorthand expressions for the LINK below.
SHLIB_INSTALL_NAME = @shlib_base_name@.$(SHLIB_SOVERSION)$(SHLIB_EXT)
SHLIB_MAP = @shlib_map_file@
SHLIB_DIR = @multilib_dir@
SHLIB_SONAME = @shlib_base_name@$(SHLIB_EXT)
# Darwin only searches in shlib_slibdir for shared libraries, not in
# subdirectories. The link builds one architecture slice in its designated
# subdir. The code under MULTIBUILDTOP combines these into a single FAT
# library, that is what we eventually install.
SHLIB_LINK = $(CC) $(LIBGCC2_CFLAGS) $(LDFLAGS) -dynamiclib -nodefaultlibs \
-install_name @shlib_slibdir@/$(SHLIB_INSTALL_NAME) \
-single_module -o $(SHLIB_DIR)/$(SHLIB_SONAME) \
-Wl,-exported_symbols_list,$(SHLIB_MAP) \
$(SHLIB_VERSTRING) \
@multilib_flags@ $(SHLIB_OBJS) $(SHLIB_LC)
@multilib_flags@ @shlib_objs@ $(SHLIB_LC)
SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk
SHLIB_MKMAP_OPTS = -v leading_underscore=1
SHLIB_VERPFX = $(srcdir)/config/$(cpu_type)/libgcc-darwin
# we're only going to build the stubs if the target slib is /usr/lib
# there is no other case in which they're useful in a live system.
ifeq (/usr/lib,$(shlib_slibdir))
LGCC_STUBS = libgcc_s.10.4.dylib libgcc_s.10.5.dylib
else
LGCC_STUBS =
endif
LGCC_FILES = libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)
LGCC_FILES += $(LGCC_STUBS)
LEXT_STUBS = libgcc_ext.10.4$(SHLIB_EXT) libgcc_ext.10.5$(SHLIB_EXT)
LGCC_FILES += $(LEXT_STUBS)
INSTALL_FILES=$(LGCC_FILES)
# we do our own thing
@ -51,33 +42,6 @@ all: $(INSTALL_FILES)
install-leaf: install-darwin-libgcc-stubs
endif
# In order to support -mmacosx-version-min, you need to have multiple
# different libgcc_s libraries that actually get linked against, one for
# each system version supported. They are 'stub' libraries that
# contain no code, just a list of exported symbols.
# The actual use of the libraries is controlled by REAL_LIBGCC_SPEC.
#
# This assumes each multilib corresponds to a different architecture.
libgcc_s.%.dylib : all-multi $(SHLIB_VERPFX).%.ver libgcc_s$(SHLIB_EXT)
MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \
for mlib in $$MLIBS ; do \
$(STRIP) -o $(@)_T$${mlib} \
-s $(SHLIB_VERPFX).$(*).ver -c -u \
../$${mlib}/libgcc/$${mlib}/libgcc_s$(SHLIB_EXT) || exit 1 ; \
done
$(LIPO) -output $@ -create $(@)_T*
rm $(@)_T*
libgcc_ext.%.dylib : all-multi $(SHLIB_VERPFX).%.ver libgcc_s$(SHLIB_EXT)
MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \
for mlib in $$MLIBS ; do \
$(STRIP) -o $(@)_T$${mlib} \
-R $(SHLIB_VERPFX).$(*).ver -c -urx \
../$${mlib}/libgcc/$${mlib}/libgcc_s$(SHLIB_EXT) || exit 1 ; \
done
$(LIPO) -output $@ -create $(@)_T*
rm $(@)_T*
libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT): all-multi libgcc_s$(SHLIB_EXT)
MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \
for mlib in $$MLIBS ; do \
@ -88,6 +52,8 @@ libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT): all-multi libgcc_s$(SHLIB_EXT)
-create libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
rm libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
# Install the shared library.
install-darwin-libgcc-stubs :
$(mkinstalldirs) $(DESTDIR)$(slibdir)
for d in $(INSTALL_FILES) ; do \
@ -96,10 +62,10 @@ install-darwin-libgcc-stubs :
else
# Do not install shared libraries for any other multilibs. Unless
# we're putting them in the gcc directory during a build, for
# compatibility with the pre-top-level layout. In that case we
# need symlinks.
# Do not install shared libraries for any other multilibs. Unless we are
# putting them in the gcc directory during a build, for compatibility with
# the pre-top-level layout. In that case we provide symlinks to the FAT lib
# from the sub-directories.
ifeq ($(enable_shared),yes)
all: install-darwin-libgcc-links