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