38 lines
1.3 KiB
Makefile
38 lines
1.3 KiB
Makefile
#
|
|
# Makefile for the Linux/Xtensa kernel.
|
|
#
|
|
|
|
extra-y := head.o vmlinux.lds
|
|
|
|
obj-y := align.o coprocessor.o entry.o irq.o pci-dma.o platform.o process.o \
|
|
ptrace.o setup.o signal.o stacktrace.o syscall.o time.o traps.o \
|
|
vectors.o
|
|
|
|
obj-$(CONFIG_KGDB) += xtensa-stub.o
|
|
obj-$(CONFIG_PCI) += pci.o
|
|
obj-$(CONFIG_MODULES) += xtensa_ksyms.o module.o
|
|
|
|
AFLAGS_head.o += -mtext-section-literals
|
|
|
|
# In the Xtensa architecture, assembly generates literals which must always
|
|
# precede the L32R instruction with a relative offset less than 256 kB.
|
|
# Therefore, the .text and .literal section must be combined in parenthesis
|
|
# in the linker script, such as: *(.literal .text).
|
|
#
|
|
# We need to post-process the generated vmlinux.lds scripts to convert
|
|
# *(xxx.text) to *(xxx.literal xxx.text) for the following text sections:
|
|
# .text .ref.text .*init.text .*exit.text .text.*
|
|
#
|
|
# Replicate rules in scripts/Makefile.build
|
|
|
|
sed-y = -e 's/\*(\(\.[a-z]*it\|\.ref\|\)\.text)/*(\1.literal \1.text)/g' \
|
|
-e 's/\.text\.unlikely/.literal.unlikely .text.unlikely/g' \
|
|
-e 's/\*(\(\.text\.[a-z]*\))/*(\1.literal \1)/g'
|
|
|
|
quiet_cmd__cpp_lds_S = LDS $@
|
|
cmd__cpp_lds_S = $(CPP) $(cpp_flags) -P -C -Uxtensa -D__ASSEMBLY__ $< \
|
|
| sed $(sed-y) >$@
|
|
|
|
$(obj)/vmlinux.lds: $(src)/vmlinux.lds.S FORCE
|
|
$(call if_changed_dep,_cpp_lds_S)
|