Apple

Hi,

I am trying to use a spinlock in my kext and am having problems with loading it. I am calling the initialization functions and using lck_spin_lock() and lck_spin_unlock(). Here is the error message:

kextload: resolving dependencies for kernel extensions with validation and authentication failures

kextload: extension /System/Library/Extensions/MyKext.kext/ appears to be loadable

kextload: loading extension /System/Library/Extensions/MyKext.kext/

kld(): Undefined symbols:

_lck_attr_alloc_init

_lck_attr_free

_lck_grp_alloc_init

_lck_grp_attr_alloc_init

_lck_grp_attr_free

_lck_grp_attr_setstat

_lck_grp_free

_lck_spin_alloc_init

_lck_spin_free

_lck_spin_lock

_lck_spin_unlock

kextload: kld_load_from_memory() failed for module /System/Library/Extensions/MyKext.kext/Contents/MacOS/MyKext

kextload: a link/load error occured for kernel extension /System/Library/Extensions/MyKext.kext/

However, I am able to find these symbols when doing the command nm /mach_kernel | less.

I am also including kernel.frameworks in my project.

Any ideas what's wrong?

Thanks.