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
