Makefile 1.7 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344
  1. # SPDX-License-Identifier: GPL-2.0
  2. #
  3. # Makefile for the Linux/Xtensa kernel.
  4. #
  5. extra-y := head.o vmlinux.lds
  6. obj-y := align.o coprocessor.o entry.o irq.o platform.o process.o \
  7. ptrace.o setup.o signal.o stacktrace.o syscall.o time.o traps.o \
  8. vectors.o
  9. obj-$(CONFIG_MMU) += pci-dma.o
  10. obj-$(CONFIG_PCI) += pci.o
  11. obj-$(CONFIG_MODULES) += xtensa_ksyms.o module.o
  12. obj-$(CONFIG_FUNCTION_TRACER) += mcount.o
  13. obj-$(CONFIG_SMP) += smp.o mxhead.o
  14. obj-$(CONFIG_XTENSA_VARIANT_HAVE_PERF_EVENTS) += perf_event.o
  15. obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
  16. obj-$(CONFIG_S32C1I_SELFTEST) += s32c1i_selftest.o
  17. obj-$(CONFIG_JUMP_LABEL) += jump_label.o
  18. # In the Xtensa architecture, assembly generates literals which must always
  19. # precede the L32R instruction with a relative offset less than 256 kB.
  20. # Therefore, the .text and .literal section must be combined in parenthesis
  21. # in the linker script, such as: *(.literal .text).
  22. #
  23. # We need to post-process the generated vmlinux.lds scripts to convert
  24. # *(xxx.text) to *(xxx.literal xxx.text) for the following text sections:
  25. # .text .ref.text .*init.text .*exit.text .text.*
  26. #
  27. # Replicate rules in scripts/Makefile.build
  28. sed-y = -e ':a; s/\*(\([^)]*\)\.text\.unlikely/*(\1.literal.unlikely .{text}.unlikely/; ta; ' \
  29. -e ':b; s/\*(\([^)]*\)\.text\(\.[a-z]*\)/*(\1.{text}\2.literal .{text}\2/; tb; ' \
  30. -e ':c; s/\*(\([^)]*\)\(\.[a-z]*it\|\.ref\)\.text/*(\1\2.literal \2.{text}/; tc; ' \
  31. -e ':d; s/\*(\([^)]\+ \|\)\.text/*(\1.literal .{text}/; td; ' \
  32. -e 's/\.{text}/.text/g'
  33. quiet_cmd__cpp_lds_S = LDS $@
  34. cmd__cpp_lds_S = $(CPP) $(cpp_flags) -P -C -Uxtensa -D__ASSEMBLY__ \
  35. -DLINKER_SCRIPT $< | sed $(sed-y) >$@
  36. $(obj)/vmlinux.lds: $(src)/vmlinux.lds.S FORCE
  37. $(call if_changed_dep,_cpp_lds_S)