Rajesh Paul wrote:
Hi,
I was trying to put in some code in a file . Make it a shared object (.so)
with PIC and am trying to generate some Relative Relocations
(R_XXX_RELATIVE) type. For verifying the same, I take the Elf Dump of the
generated object (.so) file using 'elfdump'.
Can you please suggest me a C code construct or a means which would
make/force the compiler/linker to generate some Relative Relocations for any
data/function objects defined in my source file.
Regards,
Rajesh
Might I suggest [EMAIL PROTECTED] as a place
more likely to have experience here. This topic was just
covered; I've included the message here.
- Bart
--
Bart Smaalders Solaris Kernel Performance
[EMAIL PROTECTED] http://blogs.sun.com/barts
--- Begin Message ---
Here's a quick example:
collage0021# elfdump -c data.so
collage0021# more data.c
static int local_var = 0;
int *global_data = &local_var;
collage0021# gcc -fpic -shared data.c -o data.so
collage0021# elfdump -r data.so | grep RELATIVE
R_386_RELATIVE 0x105cc .rel.data.rel.
R_386_RELATIVE 0x105d0 .rel.data.rel.
collage0021# elfdump -r data.so | grep RELATIVE
collage0021# nm -xv data.so | grep 105d0
[63] |0x000105d0|0x00000004|OBJT |GLOB |0 |20 |global_data
collage0021#
Notice that the RELATIVE relocation against 0x105d0 is against the 'global_data'
symbol. So - it's going to adjust the value of '&local_data' (which
is already stored
there) with the offset of the library (data.so) when it's loaded into its final
location in memory.
_Mike_
On 2/21/07, bhushan verma <[EMAIL PROTECTED]> wrote:
Hi
can anyone give me an c example which produces R_386_RELATIVE type relocation
Thanks
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Michael Walker
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