Good day,
I'm trying to implement a binary format loader for a foreign
executable format, and have a few questions regarding the same:
1) The executable format is static, and thus, there's no dynamic/
shared library loading involved. Is it ok to leave `load_shlib' of
`linux_binfmt' unimplemented?
2) During execution of the foreign executable, system calls are
notified via an interrupt (or programmed exception in intel
terminology) - 0x64. This is different from the interrupt raised by
linux for system calls - 0x80. Thus, I'd like to be able to intercept
these interrupts and handle them gracefully (eg: call a real linux
system call via INT 0x80 instead). I think using `set_system_gate()'
is the way to do that, is it possible to call that function in a
kernel module to register my interrupt handler?
3) Is there a method by which the kernel manages allocation of
programmed exceptions? What happens when another module which also
wants to intercept INT 0x64 is loaded?
I'm not subscribed to the list, and would appreciate it if you could
CC me on any replies.
Thank you for your time.
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Anant
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