X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/1c79356b52d46aa6b508fb032f5ae709b1f2897b..a3d08fcd5120d2aa8303b6349ca8b14e3f284af3:/osfmk/kern/bsd_kern.c diff --git a/osfmk/kern/bsd_kern.c b/osfmk/kern/bsd_kern.c index 24017dd53..5a86b23ad 100644 --- a/osfmk/kern/bsd_kern.c +++ b/osfmk/kern/bsd_kern.c @@ -34,47 +34,34 @@ #undef thread_should_halt #undef ipc_port_release -#undef thread_ast_set -#undef thread_ast_clear - -decl_simple_lock_data(extern,reaper_lock) -extern queue_head_t reaper_queue; /* BSD KERN COMPONENT INTERFACE */ -vm_address_t bsd_init_task = 0; +task_t bsd_init_task = TASK_NULL; char init_task_failure_data[1024]; +extern unsigned int not_in_kdp; /* Skip acquiring locks if we're in kdp */ thread_act_t get_firstthread(task_t); vm_map_t get_task_map(task_t); ipc_space_t get_task_ipcspace(task_t); boolean_t is_kerneltask(task_t); boolean_t is_thread_idle(thread_t); -boolean_t is_thread_running(thread_t); -thread_shuttle_t getshuttle_thread( thread_act_t); -thread_act_t getact_thread( thread_shuttle_t); vm_offset_t get_map_min( vm_map_t); vm_offset_t get_map_max( vm_map_t); int get_task_userstop(task_t); int get_thread_userstop(thread_act_t); -int inc_task_userstop(task_t); -boolean_t thread_should_abort(thread_shuttle_t); +boolean_t thread_should_abort(thread_t); boolean_t current_thread_aborted(void); void task_act_iterate_wth_args(task_t, void(*)(thread_act_t, void *), void *); void ipc_port_release(ipc_port_t); -void thread_ast_set(thread_act_t, ast_t); -void thread_ast_clear(thread_act_t, ast_t); boolean_t is_thread_active(thread_t); -event_t get_thread_waitevent(thread_t); kern_return_t get_thread_waitresult(thread_t); vm_size_t get_vmmap_size(vm_map_t); int get_vmmap_entries(vm_map_t); int get_task_numacts(task_t); thread_act_t get_firstthread(task_t task); -kern_return_t get_signalact(task_t , thread_act_t *, thread_t *, int); - -kern_return_t bsd_refvm_object(vm_object_t object); - +kern_return_t get_signalact(task_t , thread_act_t *, int); +void astbsd_on(void); /* * @@ -110,15 +97,15 @@ thread_act_t get_firstthread(task_t task) { thread_act_t thr_act; - thr_act = (thread_act_t)queue_first(&task->thr_acts); - if (thr_act == (thread_act_t)&task->thr_acts) + thr_act = (thread_act_t)queue_first(&task->threads); + if (queue_end(&task->threads, (queue_entry_t)thr_act)) thr_act = THR_ACT_NULL; if (!task->active) return(THR_ACT_NULL); return(thr_act); } -kern_return_t get_signalact(task_t task,thread_act_t * thact, thread_t * thshut, int setast) +kern_return_t get_signalact(task_t task,thread_act_t * thact, int setast) { thread_act_t inc; @@ -133,29 +120,25 @@ kern_return_t get_signalact(task_t task,thread_act_t * thact, thread_t * thshut, } thr_act = THR_ACT_NULL; - for (inc = (thread_act_t)queue_first(&task->thr_acts); - inc != (thread_act_t)&task->thr_acts; + for (inc = (thread_act_t)queue_first(&task->threads); + !queue_end(&task->threads, (queue_entry_t)inc); inc = ninc) { th = act_lock_thread(inc); - if ((inc->active) && ((th->state & TH_ABORT) != TH_ABORT)) { + if ((inc->active) && + ((th->state & (TH_ABORT|TH_ABORT_SAFELY)) != TH_ABORT)) { thr_act = inc; break; } act_unlock_thread(inc); - ninc = (thread_act_t)queue_next(&inc->thr_acts); + ninc = (thread_act_t)queue_next(&inc->task_threads); } out: if (thact) *thact = thr_act; - - if (thshut) - *thshut = thr_act? thr_act->thread: THREAD_NULL ; if (thr_act) { - if (setast) { - thread_ast_set(thr_act, AST_BSD); - if (current_act() == thr_act) - ast_on(AST_BSD); - } + if (setast) + act_set_astbsd(thr_act); + act_unlock_thread(thr_act); } task_unlock(task); @@ -166,6 +149,57 @@ out: return(KERN_FAILURE); } + +kern_return_t check_actforsig(task_t task, thread_act_t thact, int setast) +{ + + thread_act_t inc; + thread_act_t ninc; + thread_act_t thr_act; + thread_t th; + int found=0; + + task_lock(task); + if (!task->active) { + task_unlock(task); + return(KERN_FAILURE); + } + + thr_act = THR_ACT_NULL; + for (inc = (thread_act_t)queue_first(&task->threads); + !queue_end(&task->threads, (queue_entry_t)inc); + inc = ninc) { + + if (inc != thact) { + ninc = (thread_act_t)queue_next(&inc->task_threads); + continue; + } + th = act_lock_thread(inc); + if ((inc->active) && + ((th->state & (TH_ABORT|TH_ABORT_SAFELY)) != TH_ABORT)) { + found = 1; + thr_act = inc; + break; + } + act_unlock_thread(inc); + /* ninc = (thread_act_t)queue_next(&inc->thr_acts); */ + break; + } +out: + if (found) { + if (setast) + act_set_astbsd(thr_act); + + act_unlock_thread(thr_act); + } + task_unlock(task); + + if (found) + return(KERN_SUCCESS); + else + return(KERN_FAILURE); +} + /* * */ @@ -184,41 +218,42 @@ ipc_space_t get_task_ipcspace(task_t t) int get_task_numacts(task_t t) { - return(t->thr_act_count); + return(t->thread_count); +} + +/* does this machine need 64bit register set for signal handler */ +int is_64signalregset(void) +{ + task_t t = current_task(); + if(t->taskFeatures[0] & tf64BitData) + return(1); + else + return(0); } /* - * Reset the current task's map by taking a reference - * on the new map. The old map reference is returned. + * The old map reference is returned. */ vm_map_t swap_task_map(task_t task,vm_map_t map) { + thread_act_t act = current_act(); vm_map_t old_map; - vm_map_reference(map); + if (task != act->task) + panic("swap_task_map"); + task_lock(task); old_map = task->map; - task->map = map; + act->map = task->map = map; task_unlock(task); return old_map; } -/* - * Reset the current act map. - * The caller donates us a reference to the new map - * and we donote our reference to the old map to him. - */ vm_map_t swap_act_map(thread_act_t thr_act,vm_map_t map) { - vm_map_t old_map; - - act_lock(thr_act); - old_map = thr_act->map; - thr_act->map = map; - act_unlock(thr_act); - return old_map; + panic("swap_act_map"); } /* @@ -264,27 +299,21 @@ boolean_t is_thread_running(thread_t th) /* * */ -thread_shuttle_t +thread_t getshuttle_thread( - thread_act_t th) + thread_t th) { -#ifdef DEBUG - assert(th->thread); -#endif - return(th->thread); + return(th); } /* * */ -thread_act_t +thread_t getact_thread( - thread_shuttle_t th) + thread_t th) { -#ifdef DEBUG - assert(th->top_act); -#endif - return(th->top_act); + return(th); } /* @@ -322,7 +351,8 @@ get_vmsubmap_entries( int total_entries = 0; vm_map_entry_t entry; - vm_map_lock(map); + if (not_in_kdp) + vm_map_lock(map); entry = vm_map_first_entry(map); while((entry != vm_map_to_entry(map)) && (entry->vme_start < start)) { entry = entry->vme_next; @@ -340,7 +370,8 @@ get_vmsubmap_entries( } entry = entry->vme_next; } - vm_map_unlock(map); + if (not_in_kdp) + vm_map_unlock(map); return(total_entries); } @@ -351,7 +382,8 @@ get_vmmap_entries( int total_entries = 0; vm_map_entry_t entry; - vm_map_lock(map); + if (not_in_kdp) + vm_map_lock(map); entry = vm_map_first_entry(map); while(entry != vm_map_to_entry(map)) { @@ -366,7 +398,8 @@ get_vmmap_entries( } entry = entry->vme_next; } - vm_map_unlock(map); + if (not_in_kdp) + vm_map_unlock(map); return(total_entries); } @@ -393,41 +426,45 @@ get_thread_userstop( return(th->user_stop_count); } -/* - * - */ -int -inc_task_userstop( - task_t task) -{ - int i=0; - i = task->user_stop_count; - task->user_stop_count++; - return(i); -} - - /* * */ boolean_t thread_should_abort( - thread_shuttle_t th) + thread_t th) { - return( (!th->top_act || !th->top_act->active || - th->state & TH_ABORT)); + return(!th->top_act || + (th->state & (TH_ABORT|TH_ABORT_SAFELY)) == TH_ABORT); } /* - * + * This routine is like thread_should_abort() above. It checks to + * see if the current thread is aborted. But unlike above, it also + * checks to see if thread is safely aborted. If so, it returns + * that fact, and clears the condition (safe aborts only should + * have a single effect, and a poll of the abort status + * qualifies. */ boolean_t current_thread_aborted ( void) { thread_t th = current_thread(); - - return(!th->top_act || (th->state & TH_ABORT)); + spl_t s; + + if (!th->top_act || + ((th->state & (TH_ABORT|TH_ABORT_SAFELY)) == TH_ABORT && + th->interrupt_level != THREAD_UNINT)) + return (TRUE); + if (th->state & TH_ABORT_SAFELY) { + s = splsched(); + thread_lock(th); + if (th->state & TH_ABORT_SAFELY) + th->state &= ~(TH_ABORT|TH_ABORT_SAFELY); + thread_unlock(th); + splx(s); + } + return FALSE; } /* @@ -442,10 +479,10 @@ task_act_iterate_wth_args( thread_act_t inc, ninc; task_lock(task); - for (inc = (thread_act_t)queue_first(&task->thr_acts); - inc != (thread_act_t)&task->thr_acts; + for (inc = (thread_act_t)queue_first(&task->threads); + !queue_end(&task->threads, (queue_entry_t)inc); inc = ninc) { - ninc = (thread_act_t)queue_next(&inc->thr_acts); + ninc = (thread_act_t)queue_next(&inc->task_threads); (void) (*func_callback)(inc, func_arg); } task_unlock(task); @@ -458,46 +495,26 @@ ipc_port_release( ipc_object_release(&(port)->ip_object); } -void -thread_ast_set( - thread_act_t act, - ast_t reason) -{ - act->ast |= reason; -} -void -thread_ast_clear( - thread_act_t act, - ast_t reason) -{ - act->ast &= ~(reason); -} - boolean_t is_thread_active( - thread_shuttle_t th) + thread_t th) { return(th->active); } -event_t -get_thread_waitevent( - thread_shuttle_t th) -{ - return(th->wait_event); -} - kern_return_t get_thread_waitresult( - thread_shuttle_t th) + thread_t th) { return(th->wait_result); } -kern_return_t -bsd_refvm_object(vm_object_t object) +void +astbsd_on(void) { - vm_object_reference(object); - return(KERN_SUCCESS); -} + boolean_t reenable; + reenable = ml_set_interrupts_enabled(FALSE); + ast_on_fast(AST_BSD); + (void)ml_set_interrupts_enabled(reenable); +}