gcc

[Mariusz Mazur]

On 2001-08-09 Michal Moskal wrote the folowyng:

MM> On Thu, Aug 09, 2001 at 02:46:52PM +0200, Artur Frysiak wrote:
>> On Thu, Aug 09, 2001 at 01:21:00PM +0200, Michal Moskal wrote:
>> > On Wed, Aug 08, 2001 at 06:20:57PM +0200, Mariusz Mazur wrote:
>> > > How do I convince gcc to produce pure bytecode (no elf headers,
>> > > sections or else).
>> > 
>> > You possibly gotta convince as, not gcc. AFAIK gas hasn't got such
>> > options, opposite to nasm (but this won't help you much...).
>> > Anyway, how do you think you will run it w/o relocation info and stuff?
>>
>> It's not true.
>> 
>>  From etherboot Makefile:
>> 
>> # general rule for .bin (plain binary loader code), may be overridden
>> bin/%.bin:  bin/%.s
>>     $(AS32) $(ASFLAGS32) -o bin/$*.tmp $<
>>     $(OBJCOPY) -O binary bin/$*.tmp $@
>>     $(RM) bin/$*.tmp
>> 
>> AS32=as
>> ASFLAGS32=

MM> Well, as hasn't, objcopy is used to extract binary data.
MM> Anyway, one should note, that .bin file is generated from .s
MM> file, which is surly written with care, not to need any relocation.
MM> I guess it will be hard to make gcc such code (maybe -fPIC can help
MM> but I don't think so).


So how is linux kernel produced? It doesn't have elf headers does it?


Mariusz Mazur
"One Ring to bring them all and in the darkness bind them"

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