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