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-$(CONFIG_SMP) += smp.o mxhead.o
16obj-$(CONFIG_XTENSA_VARIANT_HAVE_PERF_EVENTS) += perf_event.o
17
18AFLAGS_head.o += -mtext-section-literals
19AFLAGS_mxhead.o += -mtext-section-literals
20
21# In the Xtensa architecture, assembly generates literals which must always
22# precede the L32R instruction with a relative offset less than 256 kB.
23# Therefore, the .text and .literal section must be combined in parenthesis
24# in the linker script, such as: *(.literal .text).
25#
26# We need to post-process the generated vmlinux.lds scripts to convert
27# *(xxx.text) to  *(xxx.literal xxx.text) for the following text sections:
28#   .text .ref.text .*init.text .*exit.text .text.*
29#
30# Replicate rules in scripts/Makefile.build
31
32sed-y = -e ':a; s/\*(\([^)]*\)\.text\.unlikely/*(\1.literal.unlikely .{text}.unlikely/; ta; ' \
33	-e ':b; s/\*(\([^)]*\)\.text\(\.[a-z]*\)/*(\1.{text}\2.literal .{text}\2/; tb; ' \
34	-e ':c; s/\*(\([^)]*\)\(\.[a-z]*it\|\.ref\)\.text/*(\1\2.literal \2.{text}/; tc; ' \
35	-e ':d; s/\*(\([^)]\+ \|\)\.text/*(\1.literal .{text}/; td; ' \
36	-e 's/\.{text}/.text/g'
37
38quiet_cmd__cpp_lds_S = LDS     $@
39cmd__cpp_lds_S = $(CPP) $(cpp_flags) -P -C -Uxtensa -D__ASSEMBLY__ $<    \
40                 | sed $(sed-y) >$@
41
42$(obj)/vmlinux.lds: $(src)/vmlinux.lds.S FORCE
43	$(call if_changed_dep,_cpp_lds_S)
44