1#
2# Makefile for the Linux/Xtensa kernel.
3#
4
5extra-y := head.o vmlinux.lds
6
7obj-y := align.o coprocessor.o entry.o irq.o pci-dma.o platform.o process.o \
8	 ptrace.o setup.o signal.o stacktrace.o syscall.o time.o traps.o \
9	 vectors.o
10
11obj-$(CONFIG_KGDB) += xtensa-stub.o
12obj-$(CONFIG_PCI) += pci.o
13obj-$(CONFIG_MODULES) += xtensa_ksyms.o module.o
14obj-$(CONFIG_FUNCTION_TRACER) += mcount.o
15obj-$(CONFIG_SMP) += smp.o mxhead.o
16
17AFLAGS_head.o += -mtext-section-literals
18
19# In the Xtensa architecture, assembly generates literals which must always
20# precede the L32R instruction with a relative offset less than 256 kB.
21# Therefore, the .text and .literal section must be combined in parenthesis
22# in the linker script, such as: *(.literal .text).
23#
24# We need to post-process the generated vmlinux.lds scripts to convert
25# *(xxx.text) to  *(xxx.literal xxx.text) for the following text sections:
26#   .text .ref.text .*init.text .*exit.text .text.*
27#
28# Replicate rules in scripts/Makefile.build
29
30sed-y = -e 's/\*(\(\.[a-z]*it\|\.ref\|\)\.text)/*(\1.literal \1.text)/g' \
31	-e 's/\.text\.unlikely/.literal.unlikely .text.unlikely/g'	 \
32	-e 's/\*(\(\.text .*\))/*(.literal \1)/g'			 \
33	-e 's/\*(\(\.text\.[a-z]*\))/*(\1.literal \1)/g'
34
35quiet_cmd__cpp_lds_S = LDS     $@
36cmd__cpp_lds_S = $(CPP) $(cpp_flags) -P -C -Uxtensa -D__ASSEMBLY__ $<    \
37                 | sed $(sed-y) >$@
38
39$(obj)/vmlinux.lds: $(src)/vmlinux.lds.S FORCE
40	$(call if_changed_dep,_cpp_lds_S)
41