diff options
Diffstat (limited to 'kern/ipc_mig.c')
| -rw-r--r-- | kern/ipc_mig.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/kern/ipc_mig.c b/kern/ipc_mig.c index b753a25f..18ac88ef 100644 --- a/kern/ipc_mig.c +++ b/kern/ipc_mig.c @@ -55,6 +55,7 @@ #include <device/dev_hdr.h> #include <device/device_types.h> #include <device/ds_routines.h> +#include <machine/pcb.h> /* * Routine: mach_msg_send_from_kernel @@ -879,6 +880,46 @@ kern_return_t syscall_thread_depress_abort(mach_port_name_t thread) } /* + * Routine: thread_set_self_state [mach trap] + * Purpose: + * Set current thread's state, as if with + * thread_set_state() RPC. + * + * When setting the generic state (one that contains + * the register used for syscall return value) succeeds, + * the successful return does not overwire the just-set + * register value. + * Conditions: + * Nothing locked. + * Returns: + * Nothing at all Successfully set generic state. + * KERN_SUCCESS Successfully set other state. + * KERN_INVALID_ARGUMENT Invalid flavor or state. + */ +kern_return_t thread_set_self_state( + int flavor, + thread_state_t new_state, + natural_t new_state_count) +{ + thread_t t = current_thread(); + kern_return_t kr; + natural_t new_state_copy[150]; + + if (new_state_count <= 0 || new_state_count > 150) + return KERN_INVALID_ARGUMENT; + + if (copyin(new_state, new_state_copy, new_state_count * sizeof(natural_t))) + return KERN_INVALID_ARGUMENT; + + thread_set_syscall_return(t, KERN_SUCCESS); + kr = thread_setstatus(t, flavor, new_state_copy, new_state_count); + if (kr == KERN_SUCCESS) + thread_exception_return(); + + return kr; +} + +/* * Device traps -- these are way experimental. */ io_return_t |