mirror of
https://gcc.gnu.org/git/gcc.git
synced 2024-12-21 01:55:15 +08:00
d4943ce939
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.
38 lines
839 B
Plaintext
38 lines
839 B
Plaintext
# 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
|
||
}
|