The problem is fixed now. For reference: I was using 2.19.1, after updating to 2.19.51 the ARM interworking link bugs disappeared. Greetings, Miguel Angel. 2009/6/14 Miguel Angel <miguelangel@xxxxxx>: > I've tried to setup a special section for .glue_7 and .glue_7t in the > linker script, and they got moved, but still broken. > > I could see that the _from_arm and _from_elf stubs and their code are > generated in the bfd library, and the code > seems correct, but for some reason like 1/2 of the stubs have > invalid/broken opcodes (with the correct size). > > That suggest me that they're being overwritten before being written to > .elf in disk. > > Any hint about how to debug this? > > Thanks Again, > Miguel Angel. > > PD: I've seen that the "thunk" / "noreturn" it's from the decompiler i > used to check the .elf output > > 2009/6/13 Miguel Angel <miguelangel@xxxxxx>: >> Hello, I hope I'm writting to the right list, >> >> I'm having a problem with gcc 4.4.0 cross compiler from IA32 to >> ARM7TDMI in embedded >> environments (newlib) with ARM/THUMB interworking. >> >> Everything has worked fine in my tests until I tried to make use >> of the libc, after >> doing that, some parts of the "_from_arm" generated stubs for >> interworking got broken/ >> overwritten/ ?? at linking time. Also the function attributes change >> from "thunk" to "noreturn". >> >> But it doesn't happen to all of the _from_arm stubs, only some of them. >> >> If you have any hints about where to look to solve this it or whom >> to ask , that would be great. >> >> Thanks in advance, >> Miguel Angel >> >> Correctly generated (from main.elf) >> >> .text:00003CA4 ; =============== S U B R O U T I N E >> ======================================= >> .text:00003CA4 >> .text:00003CA4 ; Attributes: thunk >> .text:00003CA4 >> .text:00003CA4 __memcpy_from_arm ; >> CODE XREF: HandleClassRequest+38 p >> .text:00003CA4 00 C0 9F E5 LDR R12, =(memcpy+1) >> .text:00003CA8 1C FF 2F E1 BX R12 >> .text:00003CA8 ; >> --------------------------------------------------------------------------- >> .text:00003CAC 25 3C 00 00 off_3CAC DCD memcpy+1 ; >> DATA XREF: __memcpy_from_arm r >> .text:00003CAC ; End of function __memcpy_from_arm >> .text:00003CAC >> .text:00003CB0 >> .text:00003CB0 ; =============== S U B R O U T I N E >> ======================================= >> .text:00003CB0 >> .text:00003CB0 ; Attributes: thunk >> .text:00003CB0 >> .text:00003CB0 ____umodsi3_from_arm ; >> CODE XREF: print_integer:loc_383C p >> .text:00003CB0 00 C0 9F E5 LDR R12, =(__umodsi3+1) >> .text:00003CB4 1C FF 2F E1 BX R12 >> .text:00003CB4 ; >> --------------------------------------------------------------------------- >> .text:00003CB8 59 3B 00 00 off_3CB8 DCD __umodsi3+1 ; >> DATA XREF: ____umodsi3_from_arm r >> .text:00003CB8 ; End of function ____umodsi3_from_arm >> .text:00003CB8 >> .text:00003CBC >> .text:00003CBC ; =============== S U B R O U T I N E >> ======================================= >> .text:00003CBC >> .text:00003CBC ; Attributes: thunk >> .text:00003CBC >> .text:00003CBC ____udivsi3_from_arm ; >> CODE XREF: print_integer+AC p >> .text:00003CBC 00 C0 9F E5 LDR R12, =(__udivsi3+1) >> .text:00003CC0 1C FF 2F E1 BX R12 >> .text:00003CC0 ; >> --------------------------------------------------------------------------- >> .text:00003CC4 CD 3A 00 00 off_3CC4 DCD __udivsi3+1 ; >> DATA XREF: ____udivsi3_from_arm r >> .text:00003CC4 ; End of function ____udivsi3_from_arm >> .text:00003CC4 >> >> >> Incorrectly generated (from main.elf) >> .text:0000514C ; =============== S U B R O U T I N E >> ======================================= >> .text:0000514C >> .text:0000514C ; Attributes: noreturn >> .text:0000514C >> .text:0000514C __memcpy_from_arm ; >> CODE XREF: HandleClassRequest+38 p >> .text:0000514C 07 00 A0 01 MOVEQ R0, R7 >> .text:00005150 0A 20 A0 03 MOVEQ R2, #0xA >> .text:00005154 01 30 A0 03 MOVEQ R3, #1 >> .text:00005154 ; End of function __memcpy_from_arm >> .text:00005154 >> .text:00005158 >> .text:00005158 ; =============== S U B R O U T I N E >> ======================================= >> .text:00005158 >> .text:00005158 ; Attributes: noreturn >> .text:00005158 >> .text:00005158 ____umodsi3_from_arm ; >> CODE XREF: print_integer:loc_4CE4 p >> .text:00005158 15 00 00 0A BEQ 0x51B4 >> .text:0000515C 78 00 53 E3 CMP R3, #0x78 >> .text:00005160 04 10 96 04 LDREQ R1, [R6],#4 >> .text:00005160 ; End of function ____umodsi3_from_arm >> .text:00005160 >> .text:00005164 >> .text:00005164 ; =============== S U B R O U T I N E >> ======================================= >> .text:00005164 >> .text:00005164 ; Attributes: noreturn >> .text:00005164 >> .text:00005164 ____udivsi3_from_arm ; >> CODE XREF: print_integer+AC p >> .text:00005164 07 00 A0 01 MOVEQ R0, R7 >> .text:00005168 10 20 A0 03 MOVEQ R2, #0x10 >> .text:0000516C 0F 00 00 0A BEQ 0x51B0 >> .text:0000516C ; End of function ____udivsi3_from_arm >> >> >> -- >> Miguel Angel Ajo Pelayo >> http://www.nbee.es >> +34 91 120 1798 >> +34 636 52 25 69 >> skype: ajoajoajo >> >> -- >> Miguel Angel Ajo Pelayo >> http://www.nbee.es >> +34 91 120 1798 >> +34 636 52 25 69 >> skype: ajoajoajo >> > > > > -- > Miguel Angel Ajo Pelayo > http://www.nbee.es > +34 91 120 1798 > +34 636 52 25 69 > skype: ajoajoajo > -- Miguel Angel Ajo Pelayo http://www.nbee.es +34 91 120 1798 +34 636 52 25 69 skype: ajoajoajo
