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tomoyo: Omit use of bin2c

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bin2c was, as its name implies, introduced to convert a binary file to
C code.

However, I did not see any good reason ever for using this tool because
using the .incbin directive is much faster, and often results in simpler
code.

Most of the uses of bin2c have been killed, for example:

  - 13610aa908 ("kernel/configs: use .incbin directive to embed config_data.gz")
  - 4c0f032d49 ("s390/purgatory: Omit use of bin2c")

security/tomoyo/Makefile has even less reason for using bin2c because
the policy files are text data. So, sed is enough for converting them
to C string literals, and what is nicer, generates human-readable
builtin-policy.h.

This is the last user of bin2c. After this commit lands, bin2c will be
removed.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
[penguin-kernel: Update sed script to also escape backslash and quote ]
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
This commit is contained in:
Masahiro Yamada 2023-01-08 22:47:26 +09:00 committed by Tetsuo Handa
parent df4840c1b8
commit 80f8be7af0
2 changed files with 8 additions and 8 deletions
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1
security/tomoyo/Kconfig
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@ -7,7 +7,6 @@ config SECURITY_TOMOYO
select SECURITY_PATH
select SECURITY_NETWORK
select SRCU
select BUILD_BIN2C
default n
help
This selects TOMOYO Linux, pathname-based access control.

15
security/tomoyo/Makefile
View File

@ -2,13 +2,14 @@
obj-y = audit.o common.o condition.o domain.o environ.o file.o gc.o group.o load_policy.o memory.o mount.o network.o realpath.o securityfs_if.o tomoyo.o util.o
targets += builtin-policy.h
define do_policy
echo "static char tomoyo_builtin_$(1)[] __initdata ="; \
$(objtree)/scripts/bin2c <$(firstword $(wildcard $(obj)/policy/$(1).conf $(srctree)/$(src)/policy/$(1).conf.default) /dev/null); \
echo ";"
endef
quiet_cmd_policy = POLICY $@
cmd_policy = ($(call do_policy,profile); $(call do_policy,exception_policy); $(call do_policy,domain_policy); $(call do_policy,manager); $(call do_policy,stat)) >$@
quiet_cmd_policy = POLICY $@
cmd_policy = { \
$(foreach x, profile exception_policy domain_policy manager stat, \
printf 'static char tomoyo_builtin_$x[] __initdata =\n'; \
sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/\t"\1\\n"/' -- $(firstword $(filter %/$x.conf %/$x.conf.default, $^) /dev/null); \
printf '\t"";\n';) \
} > $@
$(obj)/builtin-policy.h: $(wildcard $(obj)/policy/*.conf $(srctree)/$(src)/policy/*.conf.default) FORCE
$(call if_changed,policy)