arch/xtensa/kernel/Makefile

   1 #
   2 # Makefile for the Linux/Xtensa kernel.
   3 #
   4
   5 extra-y := head.o vmlinux.lds
   6
   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 \
   9          vectors.o
  10
  11 obj-$(CONFIG_KGDB) += xtensa-stub.o
  12 obj-$(CONFIG_PCI) += pci.o
  13 obj-$(CONFIG_MODULES) += xtensa_ksyms.o module.o
  14 obj-$(CONFIG_FUNCTION_TRACER) += mcount.o
  15 obj-$(CONFIG_SMP) += smp.o mxhead.o
  16
  17 AFLAGS_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
  30 sed-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/\*(\(\.text\.[a-z]*\))/*(\1.literal \1)/g'
  33
  34 quiet_cmd__cpp_lds_S = LDS     $@
  35 cmd__cpp_lds_S = $(CPP) $(cpp_flags) -P -C -Uxtensa -D__ASSEMBLY__ $<    \
  36                  | sed $(sed-y) >$@
  37
  38 $(obj)/vmlinux.lds: $(src)/vmlinux.lds.S FORCE
  39         $(call if_changed_dep,_cpp_lds_S)