srinivas bakki wrote:
You have to write a linker script to generate symbols that mark
the start and end of your section. The kernel uses this trick for
initializing all the modules, without having to call them individually
by their names.
An example of how this can be done is explained in the following link
http://geek.vtnet.ca/doc/initcall/index.html
what next after editing the script ? This section still cannot be
recognised by the running program !!! because the symbol table for
that binary is local to it. its not recognised by the current running
program.
A simple example :-
int __attribute__((section ("my_code_section")))
dummy()
{
return 100;
}
extern int __start_my_code_section, __stop_my_code_section;
int
main (void)
{
printf(" my code section start = %x, end = %x, size = %d\n",
&__start_my_code_section, &__stop_my_code_section,
&__stop_my_code_section - &__start_my_code_section);
printf(" dummy = %d\n", dummy());
return 0;
}
Here the linker automatically generates __start_my_code_section,
__stop_my_code_section variables.
Vikesh
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