1# SPDX-License-Identifier: GPL-2.0 2# 3# Makefile for the Linux/Xtensa kernel. 4# 5 6extra-y := head.o vmlinux.lds 7 8obj-y := align.o coprocessor.o entry.o irq.o platform.o process.o \ 9 ptrace.o setup.o signal.o stacktrace.o syscall.o time.o traps.o \ 10 vectors.o 11 12obj-$(CONFIG_MMU) += pci-dma.o 13obj-$(CONFIG_PCI) += pci.o 14obj-$(CONFIG_MODULES) += xtensa_ksyms.o module.o 15obj-$(CONFIG_FUNCTION_TRACER) += mcount.o 16obj-$(CONFIG_SMP) += smp.o mxhead.o 17obj-$(CONFIG_XTENSA_VARIANT_HAVE_PERF_EVENTS) += perf_event.o 18obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o 19obj-$(CONFIG_S32C1I_SELFTEST) += s32c1i_selftest.o 20obj-$(CONFIG_JUMP_LABEL) += jump_label.o 21 22# In the Xtensa architecture, assembly generates literals which must always 23# precede the L32R instruction with a relative offset less than 256 kB. 24# Therefore, the .text and .literal section must be combined in parenthesis 25# in the linker script, such as: *(.literal .text). 26# 27# We need to post-process the generated vmlinux.lds scripts to convert 28# *(xxx.text) to *(xxx.literal xxx.text) for the following text sections: 29# .text .ref.text .*init.text .*exit.text .text.* 30# 31# Replicate rules in scripts/Makefile.build 32 33sed-y = -e ':a; s/\*(\([^)]*\)\.text\.unlikely/*(\1.literal.unlikely .{text}.unlikely/; ta; ' \ 34 -e ':b; s/\*(\([^)]*\)\.text\(\.[a-z]*\)/*(\1.{text}\2.literal .{text}\2/; tb; ' \ 35 -e ':c; s/\*(\([^)]*\)\(\.[a-z]*it\|\.ref\)\.text/*(\1\2.literal \2.{text}/; tc; ' \ 36 -e ':d; s/\*(\([^)]\+ \|\)\.text/*(\1.literal .{text}/; td; ' \ 37 -e 's/\.{text}/.text/g' 38 39quiet_cmd__cpp_lds_S = LDS $@ 40cmd__cpp_lds_S = $(CPP) $(cpp_flags) -P -C -Uxtensa -D__ASSEMBLY__ \ 41 -DLINKER_SCRIPT $< | sed $(sed-y) >$@ 42 43$(obj)/vmlinux.lds: $(src)/vmlinux.lds.S FORCE 44 $(call if_changed_dep,_cpp_lds_S) 45