Hi,
I patched the SGI kernel debugger into my kernel today morning and
found the assembly equivalent of the foll. C lines
/* Initialize the module. */
atomic_set(&mod->uc.usecount,1);
if (mod->init && mod->init() != 0) {
atomic_set(&mod->uc.usecount,0);
error = -EBUSY;
goto err0;
}
to be
sys_init_module+0x433: movl $01,0x10(%ebx)
sys_init_module+0x43a: movl 0x2c(%ebx),%edx
sys_init_module+0x43d: testl %edx,%edx
sys_init_module+0x43f: je sys_init_module+0x458
sys_init_module+0x441: call *%edx
sys_init_module+0x443: testl %eax,%eax
sys_init_module+0x445: je sys_init_module+0x458
sys_init_module+0x447: movl $0x0,0x10(%ebx)
sys_init_module+0x44e: movl $0xfffffff0,0xffffffac(%ebp)
sys_init_module+0x455: jmp sys_init_module+0x4be
"mod" seems to be stored in %ebx for quite some time (I think from its
first occurence in sys_init_module, even). I dont know why.
And, about my original question, if I take my module out of the module link-
list, will it cause any problems? Till now, my modules have only been
replacing other system-calls (such as "getdents"). Would the kernel try
to reuse my kernel-memory (garbage-collection?) if I dont belong to the
module-list?
TIA
--vml,
Model Engg. College,
Cochin
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