arch/xtensa/kernel/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 #
   3 # Makefile for the Linux/Xtensa kernel.
   4 #
   5
   6 extra-y := head.o vmlinux.lds
   7
   8 obj-y := align.o coprocessor.o entry.o irq.o pci-dma.o platform.o process.o \
   9          ptrace.o setup.o signal.o stacktrace.o syscall.o time.o traps.o \
  10          vectors.o
  11
  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 obj-$(CONFIG_XTENSA_VARIANT_HAVE_PERF_EVENTS) += perf_event.o
  17 obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
  18 obj-$(CONFIG_S32C1I_SELFTEST) += s32c1i_selftest.o
  19
  20 AFLAGS_head.o += -mtext-section-literals
  21 AFLAGS_mxhead.o += -mtext-section-literals
  22
  23 # In the Xtensa architecture, assembly generates literals which must always
  24 # precede the L32R instruction with a relative offset less than 256 kB.
  25 # Therefore, the .text and .literal section must be combined in parenthesis
  26 # in the linker script, such as: *(.literal .text).
  27 #
  28 # We need to post-process the generated vmlinux.lds scripts to convert
  29 # *(xxx.text) to  *(xxx.literal xxx.text) for the following text sections:
  30 #   .text .ref.text .*init.text .*exit.text .text.*
  31 #
  32 # Replicate rules in scripts/Makefile.build
  33
  34 sed-y = -e ':a; s/\*(\([^)]*\)\.text\.unlikely/*(\1.literal.unlikely .{text}.unlikely/; ta; ' \
  35         -e ':b; s/\*(\([^)]*\)\.text\(\.[a-z]*\)/*(\1.{text}\2.literal .{text}\2/; tb; ' \
  36         -e ':c; s/\*(\([^)]*\)\(\.[a-z]*it\|\.ref\)\.text/*(\1\2.literal \2.{text}/; tc; ' \
  37         -e ':d; s/\*(\([^)]\+ \|\)\.text/*(\1.literal .{text}/; td; ' \
  38         -e 's/\.{text}/.text/g'
  39
  40 quiet_cmd__cpp_lds_S = LDS     $@
  41 cmd__cpp_lds_S = $(CPP) $(cpp_flags) -P -C -Uxtensa -D__ASSEMBLY__ $<    \
  42                  | sed $(sed-y) >$@
  43
  44 $(obj)/vmlinux.lds: $(src)/vmlinux.lds.S FORCE
  45         $(call if_changed_dep,_cpp_lds_S)