How to link the object files(.o) into one BIG object file with "Symbols partly located" ? - Embedded

Hi,

"Symbols partly located" is means:


Link some .o files with option "-Ttext 0xXXXXXX" of "ld" (fixed the
offset of .text segment),
So I want the "ld" will locate the .text with symbols those are
already exist in
.o files . keep the undefined symbols for an other follow link.


But ,"ld" will fail to output *BIG* .o file. Because there are
undefined symbols.


Please give your advice, thank you. (to the exclusion of dynmaic
library solution ,please)


ELF symbol table:


CONTENTS, READONLY
SYMBOL TABLE:
....
00007414 l F .text 0000002c _ZN6CToolsD0Ev
00000604 l O .rodata 00000008 _ZTI4CMgr
0000728c l F .text 0000006c _ZN4CMgrD1Ev
000072f8 l F .text 00000074 _ZN4CMgrD0Ev <<< exits <<<<<
....
00000000 *UND* 00000000 _Unwind_SjLj_Unregister
00000000 g F .text 000003dc _ZN9CSdhXcMgrC2EP3CNe
00000000 *UND* 00000000 _ZnwjmPKc
00000000 *UND* 00000000 _ZN8CAdapterC1Ev << keep it for
link again<
00000530 g O .rodata 00000068 _ZTV9CSdhXcMgr


thank you!


Tangkun

"tangkun" writes:

> "Symbols partly located" is means:

Doesn't "ld -r -o big.o -Ttext 0xXXXXX foo.o bar.o ..." do exactly what
you want?

Cheers,
--
In order to understand recursion you must first understand recursion.
Remove /-nsp/ for email.

Paul Pluzhnikov 写道：

> "tangkun" writes:
>
> > "Symbols partly located" is means:
>
> Doesn't "ld -r -o big.o -Ttext 0xXXXXX foo.o bar.o ..." do exactly what
> you want?
>
> Cheers,
> --
> In order to understand recursion you must first understand recursion.
> Remove /-nsp/ for email.


Hi Paul,

Thank for your advice.
But ld with "-r" will output object with all symbols NOT located(the
output just
like a Normal .o file, not doing any location).

I want ld will output a "partial" located object:
Those symbols already exisit in foo.o bar.o ... need be update into
all .text segment.
And, keep the undefined(*UND*) symbols for ld again.


Cheers,

Tangkun