projects/linux·blob master · refs

46 lines · 1.8 KiB

1# SPDX-License-Identifier: GPL-2.0
2#
3# Makefile for the Linux/Xtensa kernel.
4#
5
6always-$(KBUILD_BUILTIN) := vmlinux.lds
7
8obj-y := head.o align.o coprocessor.o entry.o irq.o platform.o process.o \
9 ptrace.o setup.o signal.o stacktrace.o syscall.o time.o traps.o \
10 vectors.o
11
12obj-$(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
17obj-$(CONFIG_SECONDARY_RESET_VECTOR) += mxhead.o
18obj-$(CONFIG_XTENSA_VARIANT_HAVE_PERF_EVENTS) += perf_event.o
19obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
20obj-$(CONFIG_S32C1I_SELFTEST) += s32c1i_selftest.o
21obj-$(CONFIG_JUMP_LABEL) += jump_label.o
22obj-$(CONFIG_HIBERNATION) += hibernate.o
23
24# In the Xtensa architecture, assembly generates literals which must always
25# precede the L32R instruction with a relative offset less than 256 kB.
26# Therefore, the .text and .literal section must be combined in parenthesis
27# in the linker script, such as: *(.literal .text).
28#
29# We need to post-process the generated vmlinux.lds scripts to convert
30# *(xxx.text) to *(xxx.literal xxx.text) for the following text sections:
31# .text .ref.text .*init.text .*exit.text .text.*
32#
33# Replicate rules in scripts/Makefile.build
34
35sed-y = -e ':a; s/\*(\([^)]*\)\.text\.unlikely/*(\1.literal.unlikely .{text}.unlikely/; ta; ' \
36 -e ':b; s/\*(\([^)]*\)\.text\(\.[a-z]*\)/*(\1.{text}\2.literal .{text}\2/; tb; ' \
37 -e ':c; s/\*(\([^)]*\)\(\.[a-z]*it\|\.ref\)\.text/*(\1\2.literal \2.{text}/; tc; ' \
38 -e ':d; s/\*(\([^)]\+ \|\)\.text/*(\1.literal .{text}/; td; ' \
39 -e 's/\.{text}/.text/g'
40
41quiet_cmd__cpp_lds_S = LDS $@
42cmd__cpp_lds_S = $(CPP) $(cpp_flags) -P -C -Uxtensa -D__ASSEMBLY__ \
43 -DLINKER_SCRIPT $< | sed $(sed-y) >$@
44
45$(obj)/vmlinux.lds: $(src)/vmlinux.lds.S FORCE
46 $(call if_changed_dep,_cpp_lds_S)