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----Original Message---- >From: David Karlton >Sent: 19 September 2005 16:00 > You guys are my heroes. LOL, save it for when/if we actually figure out what's going on! > Program Header: > PHDR off 0x00000034 vaddr 0x00400034 paddr 0x00400034 align 2**2 > filesz 0x000000e0 memsz 0x000000e0 flags r-x > INTERP off 0x00000114 vaddr 0x00400114 paddr 0x00400114 align 2**0 > filesz 0x0000000d memsz 0x0000000d flags r-- > 0x70000000 off 0x00000144 vaddr 0x00400144 paddr 0x00400144 align 2**2 > filesz 0x00000018 memsz 0x00000018 flags r-- > LOAD off 0x00000000 vaddr 0x00400000 paddr 0x00400000 align 2**16 > filesz 0x00000ac0 memsz 0x00000ac0 flags r-x > LOAD off 0x00010000 vaddr 0x10000000 paddr 0x10000000 align 2**16 > filesz 0x00000090 memsz 0x000000a0 flags rw- Heh, gotcha! Look at these two sections from the other (non-bloated) version: > LOAD off 0x00000000 vaddr 0x00400000 paddr 0x00400000 align 2**12 > filesz 0x00000950 memsz 0x00000950 flags r-x > LOAD off 0x00001000 vaddr 0x10000000 paddr 0x10000000 align 2**12 > filesz 0x00000080 memsz 0x000000a0 flags rw- Notice how the LOAD offset for the second one has jumped from 0x1000 to 0x10000 (4kB->64kB) owing to the alignment requirement having changed from 2^12 to 2^16. I believe this confirms Mike's guess about the binutils version which was stuffing executables with excess zero padding. That would also explain why zipping them works out at the same size: lots of continuous zeros zip down to almost nothing. > DYNAMIC off 0x0000015c vaddr 0x0040015c paddr 0x0040015c align 2**2 > filesz 0x000003a6 memsz 0x000003a6 flags rwx > NOTE off 0x00000124 vaddr 0x00400124 paddr 0x00400124 align 2**2 > filesz 0x00000020 memsz 0x00000020 flags r-- > Sections: > Idx Name Size VMA LMA File off Algn > 0 .interp 0000000d 00400114 00400114 00000114 2**0 > CONTENTS, ALLOC, LOAD, READONLY, DATA [snip] These are all pretty-much the same size, give or take a few dozen bytes, and the new .MIPS.stubs section which is also only a few dozen bytes, so there isn't any new code or data in the executable; it really is just padding, that should have been omitted. I do remember hearing of this bug before, although Mike seems more knowledgeable about it. What version of binutils are you using? If there's a more recent release, try it; if not, you should probably have a go with CVS HEAD, because I'm pretty sure the bug got fixed. cheers, DaveK -- Can't think of a witty .sigline today.... ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com
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