e09ab2cc2f
The .note.android.ident section is only used by GDB, which doesn't care what section type the section is, but it would be convenient for readelf -n to be able to find the section too. The old way of getting the .note.android.ident section to be of type SH_NOTE involved compiling from .c to .s using gcc, running sed to change progbits to note, and then compiling from .s to .o using gcc. Since crtbrand.c only contains a section containing data, a crtbrand.S can be checked in that will compile on all platforms, avoiding the need for sed. Also add crtbrand.o to crtbegin_so.o so that libraries also get the note, and to the crt workaround in arm libc.so. Change-Id: Ica71942a6af4553b56978ceaa288b3f4c15ebfa2
146 lines
5.9 KiB
Makefile
146 lines
5.9 KiB
Makefile
# Define the libc run-time (crt) support object files that must be built,
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# which are needed to build all other objects (shared/static libs and
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# executables)
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# ==========================================================================
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# AArch64, ARM, MIPS, and x86 all need crtbegin_so/crtend_so.
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#
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# For x86, the .init section must point to a function that calls all
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# entries in the .ctors section. (on ARM this is done through the
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# .init_array section instead).
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#
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# For all the platforms, the .fini_array section must point to a function
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# that will call __cxa_finalize(&__dso_handle) in order to ensure that
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# static C++ destructors are properly called on dlclose().
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#
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# Args:
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# my_2nd_arch_prefix: set to $(TARGET_2ND_ARCH_VAR_PREFIX) if it's
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# for the 2nd arch; otherwise empty.
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my_arch := $(TARGET_$(my_2nd_arch_prefix)ARCH)
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my_libc_crt_target_crtbegin_file := $(libc_crt_target_crtbegin_file_$(my_arch))
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my_libc_crt_target_crtbegin_so_file := $(libc_crt_target_crtbegin_so_file_$(my_arch))
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my_libc_crt_target_cflags := \
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$(libc_crt_target_cflags) \
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$(libc_crt_target_cflags_$(my_arch))
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my_libc_crt_target_so_cflags := \
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$(libc_crt_target_so_cflags_$(my_arch)) \
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$(my_libc_crt_target_cflags)
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my_libc_crt_target_ldflags := $(libc_crt_target_ldflags_$(my_arch))
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# crtbrand.S -> crtbrand.o
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GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbrand.o
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$(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
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$(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_so_cflags)
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$(GEN): $(LOCAL_PATH)/arch-common/bionic/crtbrand.S
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@mkdir -p $(dir $@)
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$(hide) $(PRIVATE_CC) $(PRIVATE_CFLAGS) \
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-MD -MF $(@:%.o=%.d) -o $@ -c $<
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$(transform-d-to-p)
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-include $(GEN:%.o=%.P)
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# crtbegin_so.c -> crtbegin_so1.o
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GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so1.o
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$(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
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$(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_so_cflags)
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$(GEN): $(my_libc_crt_target_crtbegin_so_file)
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@mkdir -p $(dir $@)
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$(hide) $(PRIVATE_CC) $(PRIVATE_CFLAGS) \
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-MD -MF $(@:%.o=%.d) -o $@ -c $<
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$(transform-d-to-p)
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-include $(GEN:%.o=%.P)
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# crtbegin_so1.o + crtbrand.o -> crtbegin_so.o
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GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
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$(GEN): PRIVATE_LD := $($(my_2nd_arch_prefix)TARGET_LD)
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$(GEN): PRIVATE_LDFLAGS := $(my_libc_crt_target_ldflags)
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$(GEN): $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so1.o \
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$($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbrand.o
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@mkdir -p $(dir $@)
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$(hide) $(PRIVATE_LD) $(PRIVATE_LDFLAGS) -r -o $@ $^
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# crtend_so.S -> crtend_so.o
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GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
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$(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
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$(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_so_cflags)
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$(GEN): $(LOCAL_PATH)/arch-common/bionic/crtend_so.S
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@mkdir -p $(dir $@)
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$(hide) $(PRIVATE_CC) $(PRIVATE_CFLAGS) \
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-MD -MF $(@:%.o=%.d) -o $@ -c $<
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$(transform-d-to-p)
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-include $(GEN:%.o=%.P)
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# crtbegin_so.o and crtend_so.o are installed to device
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GEN := $($(my_2nd_arch_prefix)TARGET_OUT_SHARED_LIBRARIES)/crtbegin_so.o
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$(GEN): $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
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$(hide) mkdir -p $(dir $@) && cp -f $< $@
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ALL_GENERATED_SOURCES += $(GEN)
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GEN := $($(my_2nd_arch_prefix)TARGET_OUT_SHARED_LIBRARIES)/crtend_so.o
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$(GEN): $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
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$(hide) mkdir -p $(dir $@) && cp -f $< $@
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ALL_GENERATED_SOURCES += $(GEN)
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# crtbegin.c -> crtbegin_static1.o
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GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static1.o
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$(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
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$(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_cflags)
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$(GEN): $(my_libc_crt_target_crtbegin_file)
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@mkdir -p $(dir $@)
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$(hide) $(PRIVATE_CC) $(PRIVATE_CFLAGS) \
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-MD -MF $(@:%.o=%.d) -o $@ -c $<
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$(transform-d-to-p)
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-include $(GEN:%.o=%.P)
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# crtbegin_static1.o + crtbrand.o -> crtbegin_static.o
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GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o
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$(GEN): PRIVATE_LD := $($(my_2nd_arch_prefix)TARGET_LD)
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$(GEN): PRIVATE_LDFLAGS := $(my_libc_crt_target_ldflags)
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$(GEN): $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static1.o \
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$($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbrand.o
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@mkdir -p $(dir $@)
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$(hide) $(PRIVATE_LD) $(PRIVATE_LDFLAGS) -r -o $@ $^
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# crtbegin.c -> crtbegin_dynamic1.o
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GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic1.o
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$(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
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$(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_cflags)
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$(GEN): $(my_libc_crt_target_crtbegin_file)
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@mkdir -p $(dir $@)
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$(hide) $(PRIVATE_CC) $(PRIVATE_CFLAGS) \
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-MD -MF $(@:%.o=%.d) -o $@ -c $<
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$(transform-d-to-p)
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-include $(GEN:%.o=%.P)
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# crtbegin_dynamic1.o + crtbrand.o -> crtbegin_dynamic.o
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GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o
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$(GEN): PRIVATE_LD := $($(my_2nd_arch_prefix)TARGET_LD)
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$(GEN): PRIVATE_LDFLAGS := $(my_libc_crt_target_ldflags)
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$(GEN): $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic1.o \
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$($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbrand.o
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@mkdir -p $(dir $@)
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$(hide) $(PRIVATE_LD) $(PRIVATE_LDFLAGS) -r -o $@ $^
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# crtend.S -> crtend_android.o
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# We rename crtend.o to crtend_android.o to avoid a
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# name clash between gcc and bionic.
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GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o
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$(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
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$(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_cflags)
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$(GEN): $(LOCAL_PATH)/arch-common/bionic/crtend.S
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@mkdir -p $(dir $@)
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$(hide) $(PRIVATE_CC) $(PRIVATE_CFLAGS) \
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-MD -MF $(@:%.o=%.d) -o $@ -c $<
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$(transform-d-to-p)
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-include $(GEN:%.o=%.P)
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# Clear temp vars
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my_libc_crt_target_ldflags :=
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my_libc_crt_target_so_cflags :=
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my_libc_crt_target_cflags :=
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my_libc_crt_target_crtbegin_so_file :=
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my_libc_crt_target_crtbegin_file :=
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my_arch :=
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