Re: lua to native linux binary
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- Subject: Re: lua to native linux binary
- From: Axel Kittenberger <axkibe@...>
- Date: 2011年8月10日 14:54:29 +0200
Thats the Lua script I'm using. I'm waving any copyright claims of that:
------------------------------
if #arg < 3 then
error("Usage: "..arg[0].." [infile] [varname] [outfile]")
end
fin, err = io.open(arg[1], "rb")
if fin == nil then
error("Cannot open '"..arg[1].."' for reading: "..err)
end
fout, err = io.open(arg[3], "w")
if fout == nil then
error("Cannot open '"..arg[3].."'for writing: "..err)
end
fout:write("/* created by "..arg[0].." from file "..arg[1].." */\n")
fout:write("#include <stddef.h>\n")
fout:write("const char "..arg[2].."_out[] = {\n")
while true do
local block = fin:read(16)
if block == nil then
break
end
for i = 1, #block do
local val = string.format("%x", block:byte(i))
if #val < 2 then
val = "0" ..val
end
fout:write("0x",val,",")
end
fout:write("\n")
end
fout:write("};\n\nsize_t "..arg[2].."_size = sizeof("..arg[2].."_out);\n");
fin:close();
fout:close();
------------------------------
In my case with following Makefile rules:
------------------------------
luac.o: luac.c
luac.c: luac.out bin2carray.lua
lua ./bin2carray.lua luac.out luac luac.c
luac.out: lsyncd.lua
luac $<
------------------------------
In the past I've been using "objcopy", its theoretically quite an
effective way to store any binary data into an executable or library.
However, I've moved back to standard c-file-array-generation since a)
its really Linux only b) had some complains about some stack bits not
correctly set or something like that, so if you arent into
rocketscience thats binary formats and linking better stay away from
it - like I eventually decided to. I just wished the people within
this craft would make the tools simpler to directly link in arbitrary
data. Thats what I had before:
------------------------------
objarch: | lsyncd.o
objdump -f lsyncd.o | grep architecture | \
sed -e "s/,.*$$//" -e "s/[^ ]* \(.*\)/1円/" > $@ || rm $@
objtarget: | lsyncd.o
objdump -f lsyncd.o | grep "file format" | \
sed -e "s/.* \(.*\)/1円/" > $@ || rm $@
luac.o: luac.out objarch objtarget
objcopy --input-target=binary \
--output-target=`cat objtarget` \
--binary-architecture=`cat objarch` $< $@
luac.out: lsyncd.lua
luac $<