OS without linking

[Hery]

i make my os in real mode (16 bits) i compile it using as and gcc, but i don't link it:

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gcc -c [...] qi.c qex.s

Does it run in real mode (like normal binary file) ?? I don't want to link it if I don't have to do it. [/code]

[DruG5t0r3]

I'm fairly sure that you need to tell gcc that your code will be running in 16bit mode at compile time first. How? Don't ask me... man gcc

[rexlunae]

I don't want to link it if I don't have to do it.

Why not?

[Hery]

I'm fairly sure that you need to tell gcc that your code will be running in 16bit mode at compile time first. How? Don't ask me... man gcc

ok, but what format of executable file i get if I only use gcc -c and as?? does it format run like binary file

[Legend]

No, it won't run like a binary file. If you use Linux, you'll get an ELF object(!) file, if use DJGPP, you will get a COFF object file ...
Those NEED to be relocated if you have more then one file, if there are no two files, then there should be no relocation necessary.

[Hery]

ok, I need answer like your now i must read man gcc

[Legend]

You could try gcc -Xlinker --oformat -Xlinker binary -o qex.s qi.c ...

Then you have a binary, but that invokes the linker

Perhaps objcopy can do what you need in a second step!

[Hery]

i'll try lot of options and configurations don't worry
PS. i have got nasty linker errors and i ask about binary file without ld (i know i'm lazy), but now...

[Hery]

i have problem with my nasty bug :/ when i link os i get lot of errors: "relocation trunaced to fit" this error are connected to variables from heading files, what's wrong?? maybay i must write everywhere:

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extern int...

, it also i connected to $0001 in instruction like this:

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movw $0001, %ax

!!

[Legend]

You are using the 16 bit ld, don't you?

[Hery]

heh, thanks, i don't know which ld i used (now, i'm sure that i used 32 bits ld), heh, i don't khow that 16 bits ld exist ;D
UPDATE: i search in google.com and i can't find 16 bits ld, on gnu.org i also can't find it. Where is 16 bits ld?? (yes, iknow i'm so lazy, but i'm really search it)

[Legend]

After finding some links I'm not that sure if this was a good hint from me :Z

http://lists.debian.org/debian-user/199 ... 00314.html

[Hery]

now, i don't know what i should do, thank you very much, i'll check many configurations & options
UPDATE:
when i try ld86 qi.o i've got message qi.o: has got bad magic number, i know that i must use as86, but:
as86 qi.s make lot of errors, in Intel syntax and in AT&T syntax are errors, what's the problem? does ld86 help me??
UPDATE2:
ok, i read som texts, now i've got problem. I'm using bcc and i've got error in instruction like this:

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#if ! defined INCLUDE
..............
#endif

i've got error after word include (sign of new line) does "bcc syntax" need something like { or maybay it's strange error which is only on my computer and i should put computer behind window??

[Hery]

i searched informations about bcc but i don't found it :/