2 # Makefile for the Linux/Xtensa kernel.
5 extra-y := head.o vmlinux.lds
7 obj-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 \
11 obj-$(CONFIG_PCI) += pci.o
12 obj-$(CONFIG_MODULES) += xtensa_ksyms.o module.o
13 obj-$(CONFIG_FUNCTION_TRACER) += mcount.o
14 obj-$(CONFIG_SMP) += smp.o mxhead.o
15 obj-$(CONFIG_XTENSA_VARIANT_HAVE_PERF_EVENTS) += perf_event.o
16 obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
18 AFLAGS_head.o += -mtext-section-literals
19 AFLAGS_mxhead.o += -mtext-section-literals
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).
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.*
30 # Replicate rules in scripts/Makefile.build
32 sed-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'
38 quiet_cmd__cpp_lds_S = LDS $@
39 cmd__cpp_lds_S = $(CPP) $(cpp_flags) -P -C -Uxtensa -D__ASSEMBLY__ $< \
42 $(obj)/vmlinux.lds: $(src)/vmlinux.lds.S FORCE
43 $(call if_changed_dep,_cpp_lds_S)