OPENCORES.ORG

-----Original Message-----

I noticed this a while ago and there was no response about this
(http://www.opencores.org/forums.cgi/openrisc/2006/02/002518).

This only applies to binutils 2.16.1, not 2.11.93

Robert Cragie, Design Engineer
_______________________________________________________________
Jennic Ltd, Furnival Street, Sheffield, S1 4QT,  UK
http://www.jennic.com  Tel: +44 (0) 114 281 2655
_______________________________________________________________

> -----Original Message-----
> From: openrisc-bounces@o...
> [mailto:openrisc-bounces@o...]On Behalf Of Tzu-Chien Chiu
> Sent: 28 July 2006 10:48
> To: List about OpenRISC project
> Subject: Re: [openrisc] LD doesn't complain undefined reference
>
>
> No. Note that in my running log I test both gcc (native compiler) and
> or32-elf-gcc (cross compiler). The former complains undefined
> reference, while the later not.
>
>
> 2006/7/28, Korbinian Schmid <korbi@g...>:
> > Hello,
> > I'm not sure whether I understood. The linker did complain, didn't he?
> >
> > I tryed your main.c but with a functin body for foo and it
> works quite well:
> >
> > void foo(){}
> > int main() { foo(); return 0; }
> >
> > objdump -S
> >
> >
> > Tzu-Chien Chiu wrote:
> >
> > > Hello, everyone:
> > >
> > > My linker or32-elf-ld didn't report complain undefined reference. What
> > > should I check?
> > >
> > > The port GNU tool chain (binutils and gcc) are not modified.
> > >
> > > Log start:
> > >
> > > $ cat main.c
> > >
> > > void foo();
> > > int main() { foo(); return 0; }
> > >
> > > $ gcc main.c
> > >
> /cygdrive/c/DOCUME~1/s110/LOCALS~1/Temp/cck3LBzx.o:main.c:(.text+0x2b):
> > > undefined reference to `_foo'
> > > collect2: ld returned 1 exit status
> > >
> > > $ or32-elf-gcc --verbose main.c
> > > Reading specs from /usr/local/cross/lib/gcc/or32-elf/3.4.4/specs
> > > Configured with: ../configure --target=or32-elf
> > > --prefix=/usr/local/cross --disable-nls --with-gnu-ld --with-gnu-ls
> > > --enable-languages=c,c++ --with-new-lib
> > > Thread model: single
> > > gcc version 3.4.4
> > > /usr/local/cross/libexec/gcc/or32-elf/3.4.4/cc1.exe -quiet -v main.c
> > > -quiet -dumpbase main.c -auxbase main -version -o
> > > /cygdrive/c/DOCUME~1/s110/LOCALS~1/Temp/ccDF265T.s
> > > ignoring nonexistent directory
> > >
> "/usr/local/cross/lib/gcc/or32-elf/3.4.4/../../../../or32-elf/sys-include"
> > >
> > > #include "..." search starts here:
> > > #include <...> search starts here:
> > > /usr/local/cross/lib/gcc/or32-elf/3.4.4/include
> > > /usr/local/cross/lib/gcc/or32-elf/3.4.4/../../../../or32-elf/include
> > > End of search list.
> > > GNU C version 3.4.4 (or32-elf)
> > >        compiled by GNU C version 3.4.4 (cygming special) (gdc 0.12,
> > > using dmd 0.125).
> > > GGC heuristics: --param ggc-min-expand=100 --param
> > > ggc-min-heapsize=131072
> > >
> /usr/local/cross/lib/gcc/or32-elf/3.4.4/../../../../or32-elf/bin/as.exe
> > > -o /cygdrive/c/DOCUME~1/s110/LOCALS~1/Temp/ccA4HgLJ.o
> > > /cygdrive/c/DOCUME~1/s110/LOCALS~1/Temp/ccDF265T.s
> > > /usr/local/cross/libexec/gcc/or32-elf/3.4.4/collect2.exe
> > > /usr/local/cross/lib/gcc/or32-elf/3.4.4/crt0.o
> > > -L/usr/local/cross/lib/gcc/or32-elf/3.4.4
> > > -L/usr/local/cross/lib/gcc/or32-elf/3.4.4/../../../../or32-elf/lib
> > > /cygdrive/c/DOCUME~1/s110/LOCALS~1/Temp/ccA4HgLJ.o -lgcc -lc -lgcc
> > >
> > > $ or32-elf-objdump -S a.out
> > >
> > > 01000218 <_main>:
> > > 1000218:       9c 21 ff f4     l.addi r1,r1,0xfffffff4
> > > 100021c:       d4 01 10 04     l.sw 0x4(r1),r2
> > > 1000220:       9c 41 00 0c     l.addi r2,r1,0xc
> > > 1000224:       d4 01 48 00     l.sw 0x0(r1),r9
> > > 1000228:       04 00 00 84     l.jal 1000438 <___main>
> > > 100022c:       15 00 00 00     l.nop 0x0
> > > 1000230:       07 bf ff 74     l.jal 0 <_start_proc-0x1000074>
> > > 1000234:       15 00 00 00     l.nop 0x0
> > > 1000238:       9c 60 00 00     l.addi r3,r0,0x0
> > > 100023c:       d7 e2 1f fc     l.sw 0xfffffffc(r2),r3
> > > 1000240:       85 62 ff fc     l.lwz r11,0xfffffffc(r2)
> > > 1000244:       85 21 00 00     l.lwz r9,0x0(r1)
> > > 1000248:       84 41 00 04     l.lwz r2,0x4(r1)
> > > 100024c:       44 00 48 00     l.jr r9
> > > 1000250:       9c 21 00 0c     l.addi r1,r1,0xc
> > >
> > > Notice that in address 1000230, the program jump to address zero.
> > >
> > >
> >
> >
> >
> >
> > test:     file format elf32-or32
> >
> > Disassembly of section .text:
> >
> > 01000074 <_foo>:
> >  1000074:       9c 21 ff fc     l.addi r1,r1,0xfffffffc
> >  1000078:       d4 01 10 00     l.sw 0x0(r1),r2
> >  100007c:       9c 41 00 04     l.addi r2,r1,0x4
> >  1000080:       84 41 00 00     l.lwz r2,0x0(r1)
> >  1000084:       44 00 48 00     l.jr r9
> >  1000088:       9c 21 00 04     l.addi r1,r1,0x4
> >
> > 0100008c <_main>:
> >  100008c:       9c 21 ff f8     l.addi r1,r1,0xfffffff8
> >  1000090:       d4 01 10 04     l.sw 0x4(r1),r2
> >  1000094:       9c 41 00 08     l.addi r2,r1,0x8
> >  1000098:       d4 01 48 00     l.sw 0x0(r1),r9
> >  100009c:       07 ff ff f6     l.jal 1000074 <_foo>
> >  10000a0:       15 00 00 00     l.nop 0x0
> >  10000a4:       9c 60 00 00     l.addi r3,r0,0x0
> >  10000a8:       a9 63 00 00     l.ori r11,r3,0x0
> >  10000ac:       85 21 00 00     l.lwz r9,0x0(r1)
> >  10000b0:       84 41 00 04     l.lwz r2,0x4(r1)
> >  10000b4:       44 00 48 00     l.jr r9
> >  10000b8:       9c 21 00 08     l.addi r1,r1,0x8
> >
> > 010000bc <_start>:
> >  10000bc:       9c 21 ff fc     l.addi r1,r1,0xfffffffc
> >  10000c0:       d4 01 48 00     l.sw 0x0(r1),r9
> >  10000c4:       a8 a3 00 00     l.ori r5,r3,0x0
> >  10000c8:       84 63 ff fc     l.lwz r3,0xfffffffc(r3)
> >  10000cc:       a8 85 00 00     l.ori r4,r5,0x0
> >  10000d0:       b8 c3 00 02     l.slli r6,r3,0x2
> >  10000d4:       e0 a5 30 00     l.add r5,r5,r6
> >  10000d8:       04 00 00 05     l.jal 10000ec <___uClibc_main>
> >  10000dc:       9c a5 00 04     l.addi r5,r5,0x4
> >  10000e0:       85 21 00 00     l.lwz r9,0x0(r1)
> >  10000e4:       44 00 48 00     l.jr r9
> >  10000e8:       9c 21 00 04     l.addi r1,r1,0x4
> >
> > 010000ec <___uClibc_main>:
> >  10000ec:       9c 21 ff f0     l.addi r1,r1,0xfffffff0
> >  10000f0:       d4 01 48 00     l.sw 0x0(r1),r9
> >  10000f4:       d4 01 50 04     l.sw 0x4(r1),r10
> >  10000f8:       d4 01 60 08     l.sw 0x8(r1),r12
> >  10000fc:       d4 01 70 0c     l.sw 0xc(r1),r14
> >  1000100:       a9 c3 00 00     l.ori r14,r3,0x0
> >  1000104:       a9 84 00 00     l.ori r12,r4,0x0
> >  1000108:       18 60 01 00     l.movhi r3,0x100
> >  100010c:       a8 63 12 04     l.ori r3,r3,0x1204
> >  1000110:       d4 03 28 00     l.sw 0x0(r3),r5
> >  1000114:       18 80 00 00     l.movhi r4,0x0
> >  1000118:       a8 84 00 00     l.ori r4,r4,0x0
> >  100011c:       9c 60 00 00     l.addi r3,r0,0x0
> >  1000120:       e4 04 18 00     l.sfeq r4,r3
> >  1000124:       10 00 00 04     l.bf 1000134 <___uClibc_main+0x48>
> >  1000128:       a9 45 00 00     l.ori r10,r5,0x0
> >  100012c:       07 bf ff b5     l.jal 0 <_foo-0x1000074>
> >  1000130:       15 00 00 00     l.nop 0x0
> >  1000134:       04 00 00 10     l.jal 1000174 <___errno_location>
> >  1000138:       15 00 00 00     l.nop 0x0
> >  100013c:       9c 60 00 00     l.addi r3,r0,0x0
> >  1000140:       a8 8c 00 00     l.ori r4,r12,0x0
> >  1000144:       d4 0b 18 00     l.sw 0x0(r11),r3
> >  1000148:       a8 aa 00 00     l.ori r5,r10,0x0
> >  100014c:       07 ff ff d0     l.jal 100008c <_main>
> >  1000150:       a8 6e 00 00     l.ori r3,r14,0x0
> >  1000154:       04 00 00 0c     l.jal 1000184 <_exit>
> >  1000158:       a8 6b 00 00     l.ori r3,r11,0x0
> >  100015c:       85 21 00 00     l.lwz r9,0x0(r1)
> >  1000160:       85 41 00 04     l.lwz r10,0x4(r1)
> >  1000164:       85 81 00 08     l.lwz r12,0x8(r1)
> >  1000168:       85 c1 00 0c     l.lwz r14,0xc(r1)
> >  100016c:       44 00 48 00     l.jr r9
> >  1000170:       9c 21 00 10     l.addi r1,r1,0x10
> >
> > 01000174 <___errno_location>:
> >  1000174:       19 60 01 00     l.movhi r11,0x100
> >  1000178:       a9 6b 12 08     l.ori r11,r11,0x1208
> >  100017c:       44 00 48 00     l.jr r9
> >  1000180:       15 00 00 00     l.nop 0x0
> >
> > 01000184 <_exit>:
> >  1000184:       9c 21 ff f8     l.addi r1,r1,0xfffffff8
> >  1000188:       d4 01 48 00     l.sw 0x0(r1),r9
> >  100018c:       d4 01 50 04     l.sw 0x4(r1),r10
> >  1000190:       a9 43 00 00     l.ori r10,r3,0x0
> >  1000194:       18 60 01 00     l.movhi r3,0x100
> >  1000198:       a8 63 12 00     l.ori r3,r3,0x1200
> >  100019c:       84 83 00 00     l.lwz r4,0x0(r3)
> >  10001a0:       9c 60 00 00     l.addi r3,r0,0x0
> >  10001a4:       e4 04 18 00     l.sfeq r4,r3
> >  10001a8:       10 00 00 04     l.bf 10001b8 <_exit+0x34>
> >  10001ac:       15 00 00 00     l.nop 0x0
> >  10001b0:       48 00 20 00     l.jalr r4
> >  10001b4:       15 00 00 00     l.nop 0x0
> >  10001b8:       04 00 00 06     l.jal 10001d0 <__exit>
> >  10001bc:       a8 6a 00 00     l.ori r3,r10,0x0
> >  10001c0:       85 21 00 00     l.lwz r9,0x0(r1)
> >  10001c4:       85 41 00 04     l.lwz r10,0x4(r1)
> >  10001c8:       44 00 48 00     l.jr r9
> >  10001cc:       9c 21 00 08     l.addi r1,r1,0x8
> >
> > 010001d0 <__exit>:
> >  10001d0:       9d 60 00 01     l.addi r11,r0,0x1
> >  10001d4:       20 00 00 01     l.sys 0x1
> >  10001d8:       15 00 00 00     l.nop 0x0
> >  10001dc:       9c 60 f0 00     l.addi r3,r0,0xfffff000
> >  10001e0:       e4 ab 18 00     l.sfleu r11,r3
> >  10001e4:       10 00 00 05     l.bf 10001f8 <__exit+0x28>
> >  10001e8:       e0 80 58 02     l.sub r4,r0,r11
> >  10001ec:       18 60 01 00     l.movhi r3,0x100
> >  10001f0:       a8 63 12 08     l.ori r3,r3,0x1208
> >  10001f4:       d4 03 20 00     l.sw 0x0(r3),r4
> >  10001f8:       44 00 48 00     l.jr r9
> >  10001fc:       15 00 00 00     l.nop 0x0
> >
> >
> > _______________________________________________
> > http://www.opencores.org/mailman/listinfo/openrisc
> >
> >
>
>
> --
> Tzu-Chien Chiu - SMedia Technology Corp.
> URL: http://www.csie.nctu.edu.tw/~jwchiu/
> _______________________________________________
> http://www.opencores.org/mailman/listinfo/openrisc