Hi all. I have a problem and would appreciate some help. The scenario is: A process executes a trap instruction (0xCC). The debug exception handler will be invoked, and I want to be able to change the instruction following the 0xCC, ie, I need to write to process address space (via access_process_vm ?) The problem is: I cannot do it from within do_debug, since the interrupts are disabled, and access_process_vm compains about it. So I thought about deferring this to tasklets or workqueues, that will run with interrupts enabled. I tried to look for help in Love's book, and it says: 1) "tasklets cannot sleep". Does it imply I cannot use access_process_vm? 2) "work queues cannot access userspace, since they do not run behalf of any process". Does it also imply I cannot use access_process_vm? I am a bit lost here. TIA, Fabiano -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
