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Hello. We've got a large-ish ARM-targetted project which we've been compiling in coff format, and would like to continue doing so. We need to link in a third-party library which we cannot get source for. They will only supply us with object files, and in arm-elf format. I downloaded binutils 2.10, and compiled a multiple-target version that understands both arm-coff and arm-elf. I used objcopy to convert their object files from elf to coff, but when I link, ld returns a bunch of "relocation truncated to fit" errors in the converted files. An excerpt from "objdump -r" on the original files... synwindow.go: file format elf32-littlearm RELOCATION RECORDS FOR [.text]: OFFSET TYPE VALUE 000005b8 R_ARM_ABS32 synthesis_win 000005f0 R_ARM_PC24 nonapcs_dctIII_32 000005f8 R_ARM_PC24 .text 00000618 R_ARM_PC24 .text The same section from our objcopy converted files... synwindow.go: file format coff-arm-little RELOCATION RECORDS FOR [.text]: OFFSET TYPE VALUE 000005b8 ARM_32 _synthesis_win 000005f0 ARM_16 _nonapcs_dctIII_32 000005f8 ARM_16 _NONAPCS_SYNWINDOW 00000618 ARM_16 _NONAPCS_SYNWINDOW I checked over both versions of each object file. All the original relocations were either of type R_ARM_ABS32 or R_ARM_PC24, and every R_ARM_ABS32 had been converted to an ARM_32, and every R_ARM_PC24 had been converted to an ARM_16. I'm far from being an expert on how relocations work, but the PC24 -> 16 conversion sounds pretty fishy to me. Can someone confirm for me that objcopy in fact did not convert the relocations properly, and suggest a workaround (other than compiling our whole project elf, a painful road which we're reluctantly starting down)? Thanks for your thoughts... ------------------------------------------- Carl Miller Firmware Engineer chaz@gordian.com Gordian, Inc. (714) 850-0205 http://www.gordian.com (personal mail: chaz@devastator.extern.ucsd.edu) ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sourceware.cygnus.com
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