The .incbin assembler directive is much faster than bin2c + $(CC).
Do similar refactoring as in
4c0f032d4963 ("s390/purgatory: Omit use of bin2c").
Please note the .quad directive matches to size_t in C (both 8
byte) because the purgatory is compiled only for the 64-bit kernel.
(KEXEC_FILE depends on X86_64).
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220725020812.622255-2-masahiroy@kernel.org
tools/test_get_len
tools/insn_sanity
tools/insn_decoder_test
-purgatory/kexec-purgatory.c
purgatory/purgatory.ro
-
config KEXEC_FILE
bool "kexec file based system call"
select KEXEC_CORE
- select BUILD_BIN2C
depends on X86_64
depends on CRYPTO=y
depends on CRYPTO_SHA256=y
$(obj)/purgatory.chk: $(obj)/purgatory.ro FORCE
$(call if_changed,ld)
-targets += kexec-purgatory.c
-
-quiet_cmd_bin2c = BIN2C $@
- cmd_bin2c = $(objtree)/scripts/bin2c kexec_purgatory < $< > $@
-
-$(obj)/kexec-purgatory.c: $(obj)/purgatory.ro $(obj)/purgatory.chk FORCE
- $(call if_changed,bin2c)
+$(obj)/kexec-purgatory.o: $(obj)/purgatory.ro $(obj)/purgatory.chk
obj-y += kexec-purgatory.o
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+
+ .section .rodata, "a"
+
+ .align 8
+kexec_purgatory:
+ .globl kexec_purgatory
+ .incbin "arch/x86/purgatory/purgatory.ro"
+.Lkexec_purgatory_end:
+
+ .align 8
+kexec_purgatory_size:
+ .globl kexec_purgatory_size
+ .quad .Lkexec_purgatory_end - kexec_purgatory
fi
rm -f scripts/extract-cert
+
+rm -f arch/x86/purgatory/kexec-purgatory.c