swapd0 Posted November 20, 2007 Report Share Posted November 20, 2007 Hi, I've been looking at ALN fileformat and have some questions. Imagine that you that you've this code. .org $4000 lea foo,a0 lea bar,a1 rts foo .dc.w 0 bar .dc.w 1 If you generate a binary output, you'll have something like this .org $4000 lea $4000+14,a0 // 6 bytes lea $4000+16,a1 // 6 bytes rts // 2 bytes foo .dc.w 0 bar .dc.w 1 But on ALN file format, are the offsets $0 relative for object files? Second question, data and bss sections must be moved to the end of each object file? If you are linking some files data and bss sections must be moved at the end of the output? I think that Genst works like this. If this is true, then this code is wrong. Isn't it? .extern foo move.w foo(a0),d0 // illegal because offset can be .l .text move.w bar(a0),d0 // illegal because bar will be moved, and offset can be bigger than .w ... .data bar .dc.w 0 Thanks. Quote Link to comment Share on other sites More sharing options...
SebRmv Posted November 21, 2007 Report Share Posted November 21, 2007 Second question, data and bss sections must be moved to the end of each object file? If you are linking some files data and bss sections must be moved at the end of the output? I think that Genst works like this. I believe the answer is yes. I believe that ALN object file format is nothing more than BSD a.out file format. A good starting point to get documentation is certainly Wikipedia. Cheers Quote Link to comment Share on other sites More sharing options...
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