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Make .note.android.ident section type SH_NOTE

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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
This commit is contained in:
Colin Cross
2015-02-12 17:03:22 -08:00
parent f9fb52ab30
commit e09ab2cc2f
4 changed files with 61 additions and 59 deletions
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31
libc/crt.mk
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@@ -31,18 +31,19 @@ my_libc_crt_target_so_cflags := \
my_libc_crt_target_ldflags := $(libc_crt_target_ldflags_$(my_arch))
# crtbrand.S -> crtbrand.o
GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbrand.o
$(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
$(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_so_cflags)
$(GEN): $(LOCAL_PATH)/bionic/crtbrand.c
$(GEN): $(LOCAL_PATH)/arch-common/bionic/crtbrand.S
@mkdir -p $(dir $@)
$(hide) $(PRIVATE_CC) $(PRIVATE_CFLAGS) \
-MD -MF $(@:%.o=%.d) -o $@ -c $<
$(transform-d-to-p)
-include $(GEN:%.o=%.P)
GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
# crtbegin_so.c -> crtbegin_so1.o
GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so1.o
$(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
$(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_so_cflags)
$(GEN): $(my_libc_crt_target_crtbegin_so_file)
@@ -52,7 +53,16 @@ $(GEN): $(my_libc_crt_target_crtbegin_so_file)
$(transform-d-to-p)
-include $(GEN:%.o=%.P)
# crtbegin_so1.o + crtbrand.o -> crtbegin_so.o
GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
$(GEN): PRIVATE_LD := $($(my_2nd_arch_prefix)TARGET_LD)
$(GEN): PRIVATE_LDFLAGS := $(my_libc_crt_target_ldflags)
$(GEN): $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so1.o \
$($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbrand.o
@mkdir -p $(dir $@)
$(hide) $(PRIVATE_LD) $(PRIVATE_LDFLAGS) -r -o $@ $^
# crtend_so.S -> crtend_so.o
GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
$(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
$(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_so_cflags)
@@ -63,8 +73,7 @@ $(GEN): $(LOCAL_PATH)/arch-common/bionic/crtend_so.S
$(transform-d-to-p)
-include $(GEN:%.o=%.P)
# The following two are installed to device
# crtbegin_so.o and crtend_so.o are installed to device
GEN := $($(my_2nd_arch_prefix)TARGET_OUT_SHARED_LIBRARIES)/crtbegin_so.o
$(GEN): $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
$(hide) mkdir -p $(dir $@) && cp -f $< $@
@@ -75,7 +84,7 @@ $(GEN): $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
$(hide) mkdir -p $(dir $@) && cp -f $< $@
ALL_GENERATED_SOURCES += $(GEN)
# crtbegin.c -> crtbegin_static1.o
GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static1.o
$(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
$(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_cflags)
@@ -86,7 +95,7 @@ $(GEN): $(my_libc_crt_target_crtbegin_file)
$(transform-d-to-p)
-include $(GEN:%.o=%.P)
# crtbegin_static1.o + crtbrand.o -> crtbegin_static.o
GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o
$(GEN): PRIVATE_LD := $($(my_2nd_arch_prefix)TARGET_LD)
$(GEN): PRIVATE_LDFLAGS := $(my_libc_crt_target_ldflags)
@@ -95,7 +104,7 @@ $(GEN): $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_stati
@mkdir -p $(dir $@)
$(hide) $(PRIVATE_LD) $(PRIVATE_LDFLAGS) -r -o $@ $^
# crtbegin.c -> crtbegin_dynamic1.o
GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic1.o
$(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
$(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_cflags)
@@ -106,7 +115,7 @@ $(GEN): $(my_libc_crt_target_crtbegin_file)
$(transform-d-to-p)
-include $(GEN:%.o=%.P)
# crtbegin_dynamic1.o + crtbrand.o -> crtbegin_dynamic.o
GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o
$(GEN): PRIVATE_LD := $($(my_2nd_arch_prefix)TARGET_LD)
$(GEN): PRIVATE_LDFLAGS := $(my_libc_crt_target_ldflags)
@@ -115,7 +124,7 @@ $(GEN): $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynam
@mkdir -p $(dir $@)
$(hide) $(PRIVATE_LD) $(PRIVATE_LDFLAGS) -r -o $@ $^
# crtend.S -> crtend_android.o
# We rename crtend.o to crtend_android.o to avoid a
# name clash between gcc and bionic.
GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o