Hi Richard, Thanks for valuable suggestion. I will try the following to certify if Image is running correctly on target. Another thing, the symbols I am linking are in ROM. ROM code is compiled with ADSv1.2 & "symbols.o" was generated using "-symdefs symbols.o" option for armlink. Now when I link my Flash (project) code with "symbols.o" using ADSv1.2 or RVDSv2.2,linker generates image with no error but if I use GCC-ARM ,linker gives a error " symbols.o: File format not recognised". This occurs due to EABI differences between ADS & GCC-ARM. As per your suggestion, one "sym.s" will be included in project code. We want to use the same source code for ADS,RVDS & GCC-ARM(few changes in *.s files are done using perl script). This will make sources to be generic & compiled with above mentioned too chains. Can I change "symbols.o" in a way so that GCC-ARM linker recognises it ? In this way I don?t have to add "sym.s" file. Regards, Kanwal -----Original Message----- From: Richard Earnshaw [mailto:Richard.Earnshaw@xxxxxxx] Sent: Tuesday, August 29, 2006 7:54 PM To: Kanwal Preet Singh CHANANA Cc: vinayakbhalkar@xxxxxxxx; gcc-help@xxxxxxxxxxx; crossgcc@xxxxxxxxxxxxxxxxxx Subject: RE: FW: GCC ARM Cross Linker Problem The following works fine for me: sym.s: .global tfunc .type tfunc %function .equ tfunc, 0x1235 main.c: extern void tfunc(void); int main() { tfunc(); return 0; } arm-elf-as sym.s -o sym.o arm-elf-gcc main.c sym.o -o main.exe arm-elf-objdump -xd main.exe ... 00008224 <main>: 8224: e1a0c00d mov ip, sp 8228: e92dd800 stmdb sp!, {fp, ip, lr, pc} 822c: e24cb004 sub fp, ip, #4 ; 0x4 8230: eb0007f8 bl a218 <__tfunc_from_arm> 8234: e3a03000 mov r3, #0 ; 0x0 8238: e1a00003 mov r0, r3 823c: e89da800 ldmia sp, {fp, sp, pc} ... 0000a218 <__tfunc_from_arm>: a218: e59fc000 ldr ip, [pc, #0] ; a220 <__tfunc_from_arm +0x8> a21c: e12fff1c bx ip a220: 00001235 andeq r1, r0, r5, lsr r2 ... Notice that __tfunc_from_arm loads the value 0x1235 into a register and issues a bx instruction, which will then correctly switch to Thumb state. R. On Tue, 2006-08-29 at 14:47, Kanwal Preet Singh CHANANA wrote: > Hi Vinayak, > Kindly refer to below mail. I am already using this following method > but it is not working. > > Regards, > Kanwal > > -----Original Message----- > From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx] > On Behalf Of Vinayak Bhalkar > Sent: Tuesday, August 29, 2006 5:42 PM > To: kanwalpreet.singh@xxxxxx > Cc: gcc-help@xxxxxxxxxxx; crossgcc@xxxxxxxxxxxxxxxxxx > Subject: Re: FW: GCC ARM Cross Linker Problem > > > > Try following- > > MaskInterrupt = 0x00c008f9; > > Regards, > vinayak > > --- kanwalpreet.singh@xxxxxx wrote: > > From: Kanwal Preet Singh CHANANA <kanwalpreet.singh@xxxxxx> > To: <gcc-help@xxxxxxxxxxx>, <crossgcc@xxxxxxxxxxxxxxxxxx> > Subject: FW: GCC ARM Cross Linker Problem > Date: Tue, 29 Aug 2006 14:59:35 +0530 > > Hi all, > > I am able to compile & Link my source files with a workaround > mentioned below: > > The absolute symbols defined in symbols.o are > > 0x000002a8 D CurTask > 0x00c008f8 T MaskInterrupt > Where Curtask is data located in RoM & MaskInterrupt is function in > Thumb Mode. > > I used following definations in Linker Script > > pCurTask = 0x000002a8; > MaskInterrupt = 0x00c008f8; > > With this I am able to link & built Image.axf file. But when running > on target,the image crashes at a point when it jumps to > MaskInterrupt(shown above) . The reason is that the Linker assumes > MaskInterrupt function to be in ARM mode.When it jumps there, it > expects 4 byte ARM instruction but the code at this location has 2 > Byte Thumb Instruction. > > The Thumb Interwork option is enabled in Build options. > > Can anyone suggest me a method to Link above symbols in a way so that > GCC-ARMv4.0.3 knows whether the symbols is Data or Thumb Function or > ARM function? If there is a way, then Image will run correctly on > Target. Also if anyone needs any help on Project porting from ADS to > GCC-ARM,then I can help him out. > > Please suggest a wayout to fix the above problem. > Regards, > Kanwal > > > > > -----Original Message----- > From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx] > On Behalf Of Kanwal Preet Singh CHANANA > Sent: Monday, August 21, 2006 3:48 PM > To: gcc-help@xxxxxxxxxxx > Subject: GCC ARM Cross Linker Problem > > > Hi all, > > I am porting my project from ADS from ARM to GCC ARM Tool chain. I am > able to compile my source files but fail to link. I have a symbols file (symbols.o) with absolute symbols addresses in format > Symboladdress SymbolType Symbolname e.g > > 0x000002a8 D CurTask > 0x00c008f8 T MaskInterrupt > > These symbols are located in ROM( code built with ADS) & project image > will be in flash. When I use this same file during build with ARM ADS, > it works fine but with GCC ARM tool chain,I get following error > message > > "./symbols.o: file not recognized: File format not recognized" > > Can anybody please tell me the solution to this error? Can I link > objects built with ADS with GCC ARM ? > > Regards, > Kanwal > > > > _____________________________________________________________ > Get your free web-based e-mail account from http://www.Math.net Your > online tourguide of Mathematics, with books, links, news, message > boards, and much more! > > > -- > For unsubscribe information see http://sourceware.org/lists.html#faq -- Richard Earnshaw Email: Richard.Earnshaw@xxxxxxx ARM Ltd Phone: +44 1223 400569 (Direct + VoiceMail) 110 Fulbourn Road Switchboard: +44 1223 400400 Cherry Hinton Fax: +44 1223 400410 Cambridge CB1 9NJ Web: http://www.arm.com/ UK -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. 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