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b4a746bc89
The new 'raise' function can be used instead of 'throw' to keep the framework headers void of C++ throw statements, which would otherwise prevent the compilation of the headers with -fno-exceptions. In the presence of the C++ runtime, the 'raise' implementation reflects the supplied error value(s) as C++ exceptions of the appropriate type. In the (future) optional absence of the C++ runtime, 'raise' remains unresolved, which then gives us the assurance that the binary contains no code path leading to 'raise', all error conditions must have been covered in other ways than 'raise'. For this reason, 'Genode::raise' is not provided by the base library but the cxx library (C++ runtime). Once we allow components to opt out of the cxx library, 'raise' will automatically become unresolved for those strict components. Issue #5245
104 lines
3.5 KiB
Makefile
104 lines
3.5 KiB
Makefile
CXX_SRC_CC += misc.cc new_delete.cc malloc_free.cc exception.cc guard.cc \
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emutls.cc raise.cc
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INC_DIR += $(REP_DIR)/src/include
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# We need the libsupc++ include directory
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STDINC = yes
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vpath %.cc $(BASE_DIR)/src/lib/cxx
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vpath %.c $(BASE_DIR)/src/lib/cxx
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#
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# Here we define all symbols we want to hide in libsupc++ and libgcc_eh
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#
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LIBC_SYMBOLS += malloc free calloc realloc \
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abort fputc fputs fwrite \
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stderr strcat strcpy strlen \
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memcmp strncmp strcmp sprintf \
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__stderrp
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#
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# Symbols for supc++.o local use only
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#
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LOCAL_CXX_SYMBOLS += _Znam _Znwm
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#
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# Symbols we wrap (see unwind.cc)
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#
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EH_SYMBOLS = _Unwind_Resume _Unwind_Complete _Unwind_DeleteException
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#
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# Additional functions for ARM
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#
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EH_SYMBOLS += __aeabi_unwind_cpp_pr0 __aeabi_unwind_cpp_pr1
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#
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# Take the right system libraries
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#
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# Normally, we never include build-system-internal files from library-
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# description files. For building the 'cxx' library, however, we need the
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# information about the used 'gcc' for resolving the location of the C++
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# support libraries. This definition is performed by 'mk/lib.mk' after
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# including this library description file. Hence, we need to manually
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# include 'global.mk' here.
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#
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include $(BASE_DIR)/mk/global.mk
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LIBCXX_GCC = $(shell $(CUSTOM_CXX_LIB) $(CC_MARCH) -print-file-name=libsupc++.a) \
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$(shell $(CUSTOM_CXX_LIB) $(CC_MARCH) -print-file-name=libgcc_eh.a || true)
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#
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# Dummy target used by the build system
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#
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SRC_O = supc++.o
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SRC_C = unwind.c
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CXX_SRC = $(sort $(CXX_SRC_CC))
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CXX_OBJECTS = $(addsuffix .o,$(basename $(CXX_SRC)))
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LOCAL_SYMBOLS = $(patsubst %,--localize-symbol=%,$(LIBC_SYMBOLS) $(LOCAL_CXX_SYMBOLS))
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REDEF_SYMBOLS = $(foreach S, $(EH_SYMBOLS), --redefine-sym $(S)=_cxx_$(S))
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#
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# Prevent symbols of the gcc support libs from being discarded during 'ld -r'
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#
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KEEP_SYMBOLS += __cxa_guard_acquire
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KEEP_SYMBOLS += __dynamic_cast
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KEEP_SYMBOLS += __cxa_throw_bad_array_new_length
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KEEP_SYMBOLS += __cxa_current_exception_type
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KEEP_SYMBOLS += _ZTVN10__cxxabiv116__enum_type_infoE
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KEEP_SYMBOLS += _ZN10__cxxabiv121__vmi_class_type_infoD0Ev
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KEEP_SYMBOLS += _ZTVN10__cxxabiv119__pointer_type_infoE
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KEEP_SYMBOLS += _ZTSN10__cxxabiv120__function_type_infoE
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KEEP_SYMBOLS += __cxa_init_primary_exception
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KEEP_SYMBOLS += __cxa_vec_new
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KEEP_SYMBOLS += _ZN9__gnu_cxx9__freeresEv
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KEEP_SYMBOLS += _ZSt17current_exceptionv
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KEEP_SYMBOLS += _ZSt17rethrow_exceptionNSt15__exception_ptr13exception_ptrE
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KEEP_SYMBOLS += _ZSt13set_terminatePFvvE
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KEEP_SYMBOLS += _ZTIPv
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KEEP_SYMBOLS += _ZTISt16nested_exception
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KEEP_SYMBOLS += _ZTVSt16nested_exception
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#
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# Include dependency files for the corresponding object files except
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# when cleaning.
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#
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# Normally, the inclusion of dependency files is handled by 'generic.mk'.
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# However, the mechanism in 'generic.mk' considers only the dependencies
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# for the compilation units contained in the 'OBJECTS' variable. For building
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# the cxx library, we rely on the 'CXX_OBJECTS' variable instead. So we need to
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# include the dependenies manually.
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#
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ifneq ($(filter-out $(MAKECMDGOALS),clean),)
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-include $(CXX_OBJECTS:.o=.d)
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endif
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#
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# Rule to link all libc definitions and libsupc++ libraries
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# and to hide after that the exported libc symbols
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#
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$(SRC_O): $(CXX_OBJECTS)
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$(MSG_MERGE)$@
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$(VERBOSE)$(LD) $(LD_MARCH) $(addprefix -u ,$(KEEP_SYMBOLS)) -r $(CXX_OBJECTS) $(LIBCXX_GCC) -o $@.tmp
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$(MSG_CONVERT)$@
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$(VERBOSE)$(OBJCOPY) $(LOCAL_SYMBOLS) $(REDEF_SYMBOLS) $@.tmp $@
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$(VERBOSE)$(RM) $@.tmp
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