/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2009 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
* the rights to redistribute these changes.
*/
-#include <cpus.h>
#include <mach_rt.h>
#include <mach_debug.h>
#include <mach_ldebug.h>
#include <mach/vm_param.h>
#include <kern/counters.h>
+#include <kern/kalloc.h>
#include <kern/mach_param.h>
+#include <kern/processor.h>
+#include <kern/cpu_data.h>
+#include <kern/cpu_number.h>
#include <kern/task.h>
#include <kern/thread.h>
-#include <kern/thread_act.h>
-#include <kern/thread_swap.h>
#include <kern/sched_prim.h>
#include <kern/misc_protos.h>
#include <kern/assert.h>
#include <kern/spl.h>
+#include <kern/machine.h>
#include <ipc/ipc_port.h>
#include <vm/vm_kern.h>
+#include <vm/vm_map.h>
#include <vm/pmap.h>
+#include <vm/vm_protos.h>
-#include <i386/thread.h>
+#include <i386/cpu_data.h>
+#include <i386/cpu_number.h>
#include <i386/eflags.h>
#include <i386/proc_reg.h>
-#include <i386/seg.h>
#include <i386/tss.h>
#include <i386/user_ldt.h>
#include <i386/fpu.h>
-#include <i386/iopb_entries.h>
+#include <i386/mp_desc.h>
+#include <i386/misc_protos.h>
+#include <i386/thread.h>
+#if defined(__i386__)
+#include <i386/fpu.h>
+#endif
+#include <i386/seg.h>
+#include <i386/machine_routines.h>
+#include <i386/lapic.h> /* LAPIC_PMC_SWI_VECTOR */
+
+#include <machine/commpage.h>
+
+#if CONFIG_COUNTERS
+#include <pmc/pmc.h>
+#endif /* CONFIG_COUNTERS */
/*
* Maps state flavor to number of words in the state:
*/
-unsigned int state_count[] = {
- /* FLAVOR_LIST */ 0,
- i386_NEW_THREAD_STATE_COUNT,
- i386_FLOAT_STATE_COUNT,
- i386_ISA_PORT_MAP_STATE_COUNT,
- i386_V86_ASSIST_STATE_COUNT,
- i386_REGS_SEGS_STATE_COUNT,
- i386_THREAD_SYSCALL_STATE_COUNT,
- /* THREAD_STATE_NONE */ 0,
- i386_SAVED_STATE_COUNT,
+unsigned int _MachineStateCount[] = {
+ /* FLAVOR_LIST */
+ 0,
+ x86_THREAD_STATE32_COUNT,
+ x86_FLOAT_STATE32_COUNT,
+ x86_EXCEPTION_STATE32_COUNT,
+ x86_THREAD_STATE64_COUNT,
+ x86_FLOAT_STATE64_COUNT,
+ x86_EXCEPTION_STATE64_COUNT,
+ x86_THREAD_STATE_COUNT,
+ x86_FLOAT_STATE_COUNT,
+ x86_EXCEPTION_STATE_COUNT,
+ 0,
+ x86_SAVED_STATE32_COUNT,
+ x86_SAVED_STATE64_COUNT,
+ x86_DEBUG_STATE32_COUNT,
+ x86_DEBUG_STATE64_COUNT,
+ x86_DEBUG_STATE_COUNT
};
+zone_t iss_zone; /* zone for saved_state area */
+zone_t ids_zone; /* zone for debug_state area */
+
/* Forward */
-void act_machine_throughcall(thread_act_t thr_act);
-extern thread_t Switch_context(
- thread_t old,
- void (*cont)(void),
- thread_t new);
+void act_machine_throughcall(thread_t thr_act);
+void act_machine_return(int);
+
extern void Thread_continue(void);
extern void Load_context(
- thread_t thread);
+ thread_t thread);
-/*
- * consider_machine_collect:
- *
- * Try to collect machine-dependent pages
- */
-void
-consider_machine_collect()
-{
-}
+static void
+get_exception_state32(thread_t thread, x86_exception_state32_t *es);
-void
-consider_machine_adjust()
-{
-}
+static void
+get_exception_state64(thread_t thread, x86_exception_state64_t *es);
+static void
+get_thread_state32(thread_t thread, x86_thread_state32_t *ts);
-/*
- * machine_kernel_stack_init:
- *
- * Initialize a kernel stack which has already been
- * attached to its thread_activation.
- */
+static void
+get_thread_state64(thread_t thread, x86_thread_state64_t *ts);
-void
-machine_kernel_stack_init(
- thread_t thread,
- void (*start_pos)(thread_t))
-{
- thread_act_t thr_act = thread->top_act;
- vm_offset_t stack;
+static int
+set_thread_state32(thread_t thread, x86_thread_state32_t *ts);
- assert(thr_act);
- stack = thread->kernel_stack;
- assert(stack);
+static int
+set_thread_state64(thread_t thread, x86_thread_state64_t *ts);
-#if MACH_ASSERT
- if (watchacts & WA_PCB) {
- printf("machine_kernel_stack_init(thr=%x,stk=%x,start_pos=%x)\n",
- thread,stack,start_pos);
- printf("\tstack_iks=%x, stack_iel=%x\n",
- STACK_IKS(stack), STACK_IEL(stack));
- }
-#endif /* MACH_ASSERT */
+#if CONFIG_COUNTERS
+static inline void
+machine_pmc_cswitch(thread_t /* old */, thread_t /* new */);
- /*
- * We want to run at start_pos, giving it as an argument
- * the return value from Load_context/Switch_context.
- * Thread_continue takes care of the mismatch between
- * the argument-passing/return-value conventions.
- * This function will not return normally,
- * so we don`t have to worry about a return address.
- */
- STACK_IKS(stack)->k_eip = (int) Thread_continue;
- STACK_IKS(stack)->k_ebx = (int) start_pos;
- STACK_IKS(stack)->k_esp = (int) STACK_IEL(stack);
+static inline boolean_t
+machine_thread_pmc_eligible(thread_t);
+
+static inline void
+pmc_swi(thread_t /* old */, thread_t /*new */);
+static inline boolean_t
+machine_thread_pmc_eligible(thread_t t) {
/*
- * Point top of kernel stack to user`s registers.
+ * NOTE: Task-level reservations are propagated to child threads via
+ * thread_create_internal. Any mutation of task reservations forces a
+ * recalculate of t_chud (for the pmc flag) for all threads in that task.
+ * Consequently, we can simply check the current thread's flag against
+ * THREAD_PMC_FLAG. If the result is non-zero, we SWI for a PMC switch.
*/
- STACK_IEL(stack)->saved_state = &thr_act->mact.pcb->iss;
+ return (t != NULL) ? ((t->t_chud & THREAD_PMC_FLAG) ? TRUE : FALSE) : FALSE;
}
+static inline void
+pmc_swi(thread_t old, thread_t new) {
+ current_cpu_datap()->csw_old_thread = old;
+ current_cpu_datap()->csw_new_thread = new;
+ __asm__ __volatile__("int %0"::"i"(LAPIC_PMC_SWI_VECTOR):"memory");
+}
-#if NCPUS > 1
-#define curr_gdt(mycpu) (mp_gdt[mycpu])
-#define curr_ktss(mycpu) (mp_ktss[mycpu])
-#else
-#define curr_gdt(mycpu) (gdt)
-#define curr_ktss(mycpu) (&ktss)
-#endif
+static inline void
+machine_pmc_cswitch(thread_t old, thread_t new) {
+ if (machine_thread_pmc_eligible(old) || machine_thread_pmc_eligible(new)) {
+ pmc_swi(old, new);
+ }
+}
+
+void ml_get_csw_threads(thread_t *old, thread_t *new) {
+ *old = current_cpu_datap()->csw_old_thread;
+ *new = current_cpu_datap()->csw_new_thread;
+}
-#define gdt_desc_p(mycpu,sel) \
- ((struct real_descriptor *)&curr_gdt(mycpu)[sel_idx(sel)])
+#endif /* CONFIG_COUNTERS */
-void
-act_machine_switch_pcb( thread_act_t new_act )
+/*
+ * Don't let an illegal value for dr7 get set. Specifically,
+ * check for undefined settings. Setting these bit patterns
+ * result in undefined behaviour and can lead to an unexpected
+ * TRCTRAP.
+ */
+static boolean_t
+dr7_is_valid(uint32_t *dr7)
{
- pcb_t pcb = new_act->mact.pcb;
- int mycpu;
- {
- register iopb_tss_t tss = pcb->ims.io_tss;
- vm_offset_t pcb_stack_top;
+ int i;
+ uint32_t mask1, mask2;
- assert(new_act->thread != NULL);
- assert(new_act->thread->kernel_stack != 0);
- STACK_IEL(new_act->thread->kernel_stack)->saved_state =
- &new_act->mact.pcb->iss;
+ /*
+ * If the DE bit is set in CR4, R/W0-3 can be pattern
+ * "10B" to indicate i/o reads and write
+ */
+ if (!(get_cr4() & CR4_DE))
+ for (i = 0, mask1 = 0x3<<16, mask2 = 0x2<<16; i < 4;
+ i++, mask1 <<= 4, mask2 <<= 4)
+ if ((*dr7 & mask1) == mask2)
+ return (FALSE);
/*
- * Save a pointer to the top of the "kernel" stack -
- * actually the place in the PCB where a trap into
- * kernel mode will push the registers.
- * The location depends on V8086 mode. If we are
- * not in V8086 mode, then a trap into the kernel
- * won`t save the v86 segments, so we leave room.
+ * len0-3 pattern "10B" is ok for len on Merom and newer processors
+ * (it signifies an 8-byte wide region). We use the 64bit capability
+ * of the processor in lieu of the more laborious model/family checks
+ * as all 64-bit capable processors so far support this.
+ * Reject an attempt to use this on 64-bit incapable processors.
*/
+ if (current_cpu_datap()->cpu_is64bit == FALSE)
+ for (i = 0, mask1 = 0x3<<18, mask2 = 0x2<<18; i < 4;
+ i++, mask1 <<= 4, mask2 <<= 4)
+ if ((*dr7 & mask1) == mask2)
+ return (FALSE);
- pcb_stack_top = (pcb->iss.efl & EFL_VM)
- ? (int) (&pcb->iss + 1)
- : (int) (&pcb->iss.v86_segs);
-
- mp_disable_preemption();
- mycpu = cpu_number();
-
- if (tss == 0) {
- /*
- * No per-thread IO permissions.
- * Use standard kernel TSS.
- */
- if (!(gdt_desc_p(mycpu,KERNEL_TSS)->access & ACC_TSS_BUSY))
- set_tr(KERNEL_TSS);
- curr_ktss(mycpu)->esp0 = pcb_stack_top;
- }
- else {
- /*
- * Set the IO permissions. Use this thread`s TSS.
- */
- *gdt_desc_p(mycpu,USER_TSS)
- = *(struct real_descriptor *)tss->iopb_desc;
- tss->tss.esp0 = pcb_stack_top;
- set_tr(USER_TSS);
- gdt_desc_p(mycpu,KERNEL_TSS)->access &= ~ ACC_TSS_BUSY;
- }
- }
+ /*
+ * if we are doing an instruction execution break (indicated
+ * by r/w[x] being "00B"), then the len[x] must also be set
+ * to "00B"
+ */
+ for (i = 0; i < 4; i++)
+ if (((((*dr7 >> (16 + i*4))) & 0x3) == 0) &&
+ ((((*dr7 >> (18 + i*4))) & 0x3) != 0))
+ return (FALSE);
- {
- register user_ldt_t ldt = pcb->ims.ldt;
/*
- * Set the thread`s LDT.
+ * Intel docs have these bits fixed.
*/
- if (ldt == 0) {
- /*
- * Use system LDT.
- */
- set_ldt(KERNEL_LDT);
- }
- else {
- /*
- * Thread has its own LDT.
- */
- *gdt_desc_p(mycpu,USER_LDT) = ldt->desc;
- set_ldt(USER_LDT);
- }
- }
- mp_enable_preemption();
+ *dr7 |= 0x1 << 10; /* set bit 10 to 1 */
+ *dr7 &= ~(0x1 << 11); /* set bit 11 to 0 */
+ *dr7 &= ~(0x1 << 12); /* set bit 12 to 0 */
+ *dr7 &= ~(0x1 << 14); /* set bit 14 to 0 */
+ *dr7 &= ~(0x1 << 15); /* set bit 15 to 0 */
+
/*
- * Load the floating-point context, if necessary.
+ * We don't allow anything to set the global breakpoints.
*/
- fpu_load_context(pcb);
+ if (*dr7 & 0x2)
+ return (FALSE);
+
+ if (*dr7 & (0x2<<2))
+ return (FALSE);
+
+ if (*dr7 & (0x2<<4))
+ return (FALSE);
+
+ if (*dr7 & (0x2<<6))
+ return (FALSE);
+
+ return (TRUE);
}
-/*
- * flush out any lazily evaluated HW state in the
- * owning thread's context, before termination.
- */
-void
-thread_machine_flush( thread_act_t cur_act )
+static inline void
+set_live_debug_state32(cpu_data_t *cdp, x86_debug_state32_t *ds)
{
- fpflush(cur_act);
+ __asm__ volatile ("movl %0,%%db0" : :"r" (ds->dr0));
+ __asm__ volatile ("movl %0,%%db1" : :"r" (ds->dr1));
+ __asm__ volatile ("movl %0,%%db2" : :"r" (ds->dr2));
+ __asm__ volatile ("movl %0,%%db3" : :"r" (ds->dr3));
+ if (cpu_mode_is64bit())
+ cdp->cpu_dr7 = ds->dr7;
}
-/*
- * Switch to the first thread on a CPU.
- */
-void
-load_context(
- thread_t new)
+extern void set_64bit_debug_regs(x86_debug_state64_t *ds);
+
+static inline void
+set_live_debug_state64(cpu_data_t *cdp, x86_debug_state64_t *ds)
{
- act_machine_switch_pcb(new->top_act);
- Load_context(new);
+ /*
+ * We need to enter 64-bit mode in order to set the full
+ * width of these registers
+ */
+ set_64bit_debug_regs(ds);
+ cdp->cpu_dr7 = ds->dr7;
}
-/*
- * Number of times we needed to swap an activation back in before
- * switching to it.
- */
-int switch_act_swapins = 0;
-
-/*
- * machine_switch_act
- *
- * Machine-dependent details of activation switching. Called with
- * RPC locks held and preemption disabled.
- */
-void
-machine_switch_act(
- thread_t thread,
- thread_act_t old,
- thread_act_t new,
- int cpu)
+boolean_t
+debug_state_is_valid32(x86_debug_state32_t *ds)
{
+ if (!dr7_is_valid(&ds->dr7))
+ return FALSE;
+
+#if defined(__i386__)
/*
- * Switch the vm, ast and pcb context.
- * Save FP registers if in use and set TS (task switch) bit.
+ * Only allow local breakpoints and make sure they are not
+ * in the trampoline code.
*/
- fpu_save_context(thread);
+ if (ds->dr7 & 0x1)
+ if (ds->dr0 >= (unsigned long)HIGH_MEM_BASE)
+ return FALSE;
- active_stacks[cpu] = thread->kernel_stack;
- ast_context(new, cpu);
+ if (ds->dr7 & (0x1<<2))
+ if (ds->dr1 >= (unsigned long)HIGH_MEM_BASE)
+ return FALSE;
- PMAP_SWITCH_CONTEXT(old, new, cpu);
- act_machine_switch_pcb(new);
+ if (ds->dr7 & (0x1<<4))
+ if (ds->dr2 >= (unsigned long)HIGH_MEM_BASE)
+ return FALSE;
+
+ if (ds->dr7 & (0x1<<6))
+ if (ds->dr3 >= (unsigned long)HIGH_MEM_BASE)
+ return FALSE;
+#endif
+
+ return TRUE;
}
-/*
- * Switch to a new thread.
- * Save the old thread`s kernel state or continuation,
- * and return it.
- */
-thread_t
-switch_context(
- thread_t old,
- void (*continuation)(void),
- thread_t new)
+boolean_t
+debug_state_is_valid64(x86_debug_state64_t *ds)
{
- register thread_act_t old_act = old->top_act,
- new_act = new->top_act;
-
-#if MACH_RT
- assert(old_act->kernel_loaded ||
- active_stacks[cpu_number()] == old_act->thread->kernel_stack);
- assert (get_preemption_level() == 1);
-#endif
- check_simple_locks();
+ if (!dr7_is_valid((uint32_t *)&ds->dr7))
+ return FALSE;
/*
- * Save FP registers if in use.
+ * Don't allow the user to set debug addresses above their max
+ * value
*/
- fpu_save_context(old);
+ if (ds->dr7 & 0x1)
+ if (ds->dr0 >= VM_MAX_PAGE_ADDRESS)
+ return FALSE;
-#if MACH_ASSERT
- if (watchacts & WA_SWITCH)
- printf("\tswitch_context(old=%x con=%x new=%x)\n",
- old, continuation, new);
-#endif /* MACH_ASSERT */
+ if (ds->dr7 & (0x1<<2))
+ if (ds->dr1 >= VM_MAX_PAGE_ADDRESS)
+ return FALSE;
- /*
- * Switch address maps if need be, even if not switching tasks.
- * (A server activation may be "borrowing" a client map.)
- */
- {
- int mycpu = cpu_number();
+ if (ds->dr7 & (0x1<<4))
+ if (ds->dr2 >= VM_MAX_PAGE_ADDRESS)
+ return FALSE;
- PMAP_SWITCH_CONTEXT(old_act, new_act, mycpu)
- }
+ if (ds->dr7 & (0x1<<6))
+ if (ds->dr3 >= VM_MAX_PAGE_ADDRESS)
+ return FALSE;
- /*
- * Load the rest of the user state for the new thread
- */
- act_machine_switch_pcb(new_act);
- KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_SCHED,MACH_SCHED) | DBG_FUNC_NONE,
- (int)old, (int)new, old->sched_pri, new->sched_pri, 0);
- return(Switch_context(old, continuation, new));
+ return TRUE;
}
-void
-pcb_module_init(void)
+
+static kern_return_t
+set_debug_state32(thread_t thread, x86_debug_state32_t *ds)
{
- fpu_module_init();
- iopb_init();
+ x86_debug_state32_t *ids;
+ pcb_t pcb;
+
+ pcb = thread->machine.pcb;
+ ids = pcb->ids;
+
+ if (debug_state_is_valid32(ds) != TRUE) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ if (ids == NULL) {
+ ids = zalloc(ids_zone);
+ bzero(ids, sizeof *ids);
+
+ simple_lock(&pcb->lock);
+ /* make sure it wasn't already alloc()'d elsewhere */
+ if (pcb->ids == NULL) {
+ pcb->ids = ids;
+ simple_unlock(&pcb->lock);
+ } else {
+ simple_unlock(&pcb->lock);
+ zfree(ids_zone, ids);
+ }
+ }
+
+
+ copy_debug_state32(ds, ids, FALSE);
+
+ return (KERN_SUCCESS);
}
-void
-pcb_init( register thread_act_t thr_act )
+static kern_return_t
+set_debug_state64(thread_t thread, x86_debug_state64_t *ds)
{
- register pcb_t pcb;
+ x86_debug_state64_t *ids;
+ pcb_t pcb;
- assert(thr_act->mact.pcb == (pcb_t)0);
- pcb = thr_act->mact.pcb = &thr_act->mact.xxx_pcb;
+ pcb = thread->machine.pcb;
+ ids = pcb->ids;
-#if MACH_ASSERT
- if (watchacts & WA_PCB)
- printf("pcb_init(%x) pcb=%x\n", thr_act, pcb);
-#endif /* MACH_ASSERT */
+ if (debug_state_is_valid64(ds) != TRUE) {
+ return KERN_INVALID_ARGUMENT;
+ }
- /*
- * We can't let random values leak out to the user.
- * (however, act_create() zeroed the entire thr_act, mact, pcb)
- * bzero((char *) pcb, sizeof *pcb);
- */
- simple_lock_init(&pcb->lock, ETAP_MISC_PCB);
+ if (ids == NULL) {
+ ids = zalloc(ids_zone);
+ bzero(ids, sizeof *ids);
- /*
- * Guarantee that the bootstrapped thread will be in user
- * mode.
- */
- pcb->iss.cs = USER_CS;
- pcb->iss.ss = USER_DS;
- pcb->iss.ds = USER_DS;
- pcb->iss.es = USER_DS;
- pcb->iss.fs = USER_DS;
- pcb->iss.gs = USER_DS;
- pcb->iss.efl = EFL_USER_SET;
+ simple_lock(&pcb->lock);
+ /* make sure it wasn't already alloc()'d elsewhere */
+ if (pcb->ids == NULL) {
+ pcb->ids = ids;
+ simple_unlock(&pcb->lock);
+ } else {
+ simple_unlock(&pcb->lock);
+ zfree(ids_zone, ids);
+ }
+ }
+
+ copy_debug_state64(ds, ids, FALSE);
+
+ return (KERN_SUCCESS);
}
-/*
- * Adjust saved register state for thread belonging to task
- * created with kernel_task_create().
- */
-void
-pcb_user_to_kernel(
- thread_act_t thr_act)
+static void
+get_debug_state32(thread_t thread, x86_debug_state32_t *ds)
{
- register pcb_t pcb = thr_act->mact.pcb;
-
- pcb->iss.cs = KERNEL_CS;
- pcb->iss.ss = KERNEL_DS;
- pcb->iss.ds = KERNEL_DS;
- pcb->iss.es = KERNEL_DS;
- pcb->iss.fs = KERNEL_DS;
- pcb->iss.gs = CPU_DATA;
+ x86_debug_state32_t *saved_state;
+
+ saved_state = thread->machine.pcb->ids;
+
+ if (saved_state) {
+ copy_debug_state32(saved_state, ds, TRUE);
+ } else
+ bzero(ds, sizeof *ds);
}
-void
-pcb_terminate(
- register thread_act_t thr_act)
+static void
+get_debug_state64(thread_t thread, x86_debug_state64_t *ds)
{
- register pcb_t pcb = thr_act->mact.pcb;
+ x86_debug_state64_t *saved_state;
- assert(pcb);
+ saved_state = (x86_debug_state64_t *)thread->machine.pcb->ids;
- if (pcb->ims.io_tss != 0)
- iopb_destroy(pcb->ims.io_tss);
- if (pcb->ims.ifps != 0)
- fp_free(pcb->ims.ifps);
- if (pcb->ims.ldt != 0)
- user_ldt_free(pcb->ims.ldt);
- thr_act->mact.pcb = (pcb_t)0;
+ if (saved_state) {
+ copy_debug_state64(saved_state, ds, TRUE);
+ } else
+ bzero(ds, sizeof *ds);
}
/*
- * pcb_collect:
+ * consider_machine_collect:
*
- * Attempt to free excess pcb memory.
+ * Try to collect machine-dependent pages
*/
-
void
-pcb_collect(
- register thread_act_t thr_act)
+consider_machine_collect(void)
{
- /* accomplishes very little */
}
-/*
- * act_machine_sv_free
- * release saveareas associated with an act. if flag is true, release
- * user level savearea(s) too, else don't
- */
void
-act_machine_sv_free(thread_act_t act, int flag)
+consider_machine_adjust(void)
{
-
}
+extern void *get_bsduthreadarg(thread_t th);
-/*
- * act_machine_set_state:
- *
- * Set the status of the specified thread. Called with "appropriate"
- * thread-related locks held (see act_lock_thread()), so
- * thr_act->thread is guaranteed not to change.
- */
-
-kern_return_t
-act_machine_set_state(
- thread_act_t thr_act,
- thread_flavor_t flavor,
- thread_state_t tstate,
- mach_msg_type_number_t count)
+#if defined(__x86_64__)
+static void
+act_machine_switch_pcb( thread_t new )
{
- int kernel_act = thr_act->kernel_loading ||
- thr_act->kernel_loaded;
-
-#if MACH_ASSERT
- if (watchacts & WA_STATE)
- printf("act_%x act_m_set_state(thr_act=%x,flav=%x,st=%x,cnt=%x)\n",
- current_act(), thr_act, flavor, tstate, count);
-#endif /* MACH_ASSERT */
+ pcb_t pcb = new->machine.pcb;
+ struct real_descriptor *ldtp;
+ mach_vm_offset_t pcb_stack_top;
+ cpu_data_t *cdp = current_cpu_datap();
- switch (flavor) {
- case THREAD_SYSCALL_STATE:
- {
- register struct thread_syscall_state *state;
- register struct i386_saved_state *saved_state = USER_REGS(thr_act);
+ assert(new->kernel_stack != 0);
- state = (struct thread_syscall_state *) tstate;
- saved_state->eax = state->eax;
- saved_state->edx = state->edx;
- if (kernel_act)
- saved_state->efl = state->efl;
- else
- saved_state->efl = (state->efl & ~EFL_USER_CLEAR) | EFL_USER_SET;
- saved_state->eip = state->eip;
- saved_state->uesp = state->esp;
- break;
- }
+ if (!cpu_mode_is64bit()) {
+ panic("K64 is 64bit!");
+ } else if (is_saved_state64(pcb->iss)) {
+ /*
+ * The test above is performed against the thread save state
+ * flavor and not task's 64-bit feature flag because of the
+ * thread/task 64-bit state divergence that can arise in
+ * task_set_64bit() x86: the task state is changed before
+ * the individual thread(s).
+ */
+ x86_saved_state64_tagged_t *iss64;
+ vm_offset_t isf;
- case i386_SAVED_STATE:
- {
- register struct i386_saved_state *state;
- register struct i386_saved_state *saved_state;
+ assert(is_saved_state64(pcb->iss));
+
+ iss64 = (x86_saved_state64_tagged_t *) pcb->iss;
+
+ /*
+ * Set pointer to PCB's interrupt stack frame in cpu data.
+ * Used by syscall and double-fault trap handlers.
+ */
+ isf = (vm_offset_t) &iss64->state.isf;
+ cdp->cpu_uber.cu_isf = isf;
+ pcb_stack_top = (vm_offset_t) (iss64 + 1);
+ /* require 16-byte alignment */
+ assert((pcb_stack_top & 0xF) == 0);
- if (count < i386_SAVED_STATE_COUNT) {
- return(KERN_INVALID_ARGUMENT);
- }
+ /* Interrupt stack is pcb */
+ current_ktss64()->rsp0 = pcb_stack_top;
- state = (struct i386_saved_state *) tstate;
+ /*
+ * Top of temporary sysenter stack points to pcb stack.
+ * Although this is not normally used by 64-bit users,
+ * it needs to be set in case a sysenter is attempted.
+ */
+ *current_sstk64() = pcb_stack_top;
- saved_state = USER_REGS(thr_act);
+ cdp->cpu_task_map = new->map->pmap->pm_task_map;
/*
- * General registers
+ * Enable the 64-bit user code segment, USER64_CS.
+ * Disable the 32-bit user code segment, USER_CS.
*/
- saved_state->edi = state->edi;
- saved_state->esi = state->esi;
- saved_state->ebp = state->ebp;
- saved_state->uesp = state->uesp;
- saved_state->ebx = state->ebx;
- saved_state->edx = state->edx;
- saved_state->ecx = state->ecx;
- saved_state->eax = state->eax;
- saved_state->eip = state->eip;
- if (kernel_act)
- saved_state->efl = state->efl;
- else
- saved_state->efl = (state->efl & ~EFL_USER_CLEAR)
- | EFL_USER_SET;
+ ldt_desc_p(USER64_CS)->access |= ACC_PL_U;
+ ldt_desc_p(USER_CS)->access &= ~ACC_PL_U;
/*
- * Segment registers. Set differently in V8086 mode.
+ * Switch user's GS base if necessary
+ * by setting the Kernel's GS base MSR
+ * - this will become the user's on the swapgs when
+ * returning to user-space.
*/
- if (state->efl & EFL_VM) {
- /*
- * Set V8086 mode segment registers.
- */
- saved_state->cs = state->cs & 0xffff;
- saved_state->ss = state->ss & 0xffff;
- saved_state->v86_segs.v86_ds = state->ds & 0xffff;
- saved_state->v86_segs.v86_es = state->es & 0xffff;
- saved_state->v86_segs.v86_fs = state->fs & 0xffff;
- saved_state->v86_segs.v86_gs = state->gs & 0xffff;
-
- /*
- * Zero protected mode segment registers.
- */
- saved_state->ds = 0;
- saved_state->es = 0;
- saved_state->fs = 0;
- saved_state->gs = 0;
-
- if (thr_act->mact.pcb->ims.v86s.int_table) {
- /*
- * Hardware assist on.
- */
- thr_act->mact.pcb->ims.v86s.flags =
- state->efl & (EFL_TF | EFL_IF);
- }
- }
- else if (!kernel_act) {
- /*
- * 386 mode. Set segment registers for flat
- * 32-bit address space.
- */
- saved_state->cs = USER_CS;
- saved_state->ss = USER_DS;
- saved_state->ds = USER_DS;
- saved_state->es = USER_DS;
- saved_state->fs = USER_DS;
- saved_state->gs = USER_DS;
+ if (cdp->cpu_uber.cu_user_gs_base != pcb->cthread_self) {
+ cdp->cpu_uber.cu_user_gs_base = pcb->cthread_self;
+ wrmsr64(MSR_IA32_KERNEL_GS_BASE, pcb->cthread_self);
}
- else {
- /*
- * User setting segment registers.
- * Code and stack selectors have already been
- * checked. Others will be reset by 'iret'
- * if they are not valid.
- */
- saved_state->cs = state->cs;
- saved_state->ss = state->ss;
- saved_state->ds = state->ds;
- saved_state->es = state->es;
- saved_state->fs = state->fs;
- saved_state->gs = state->gs;
- }
- break;
- }
+ } else {
+ x86_saved_state_compat32_t *iss32compat;
+ vm_offset_t isf;
- case i386_NEW_THREAD_STATE:
- case i386_REGS_SEGS_STATE:
- {
- register struct i386_new_thread_state *state;
- register struct i386_saved_state *saved_state;
+ assert(is_saved_state32(pcb->iss));
+ iss32compat = (x86_saved_state_compat32_t *) pcb->iss;
- if (count < i386_NEW_THREAD_STATE_COUNT) {
- return(KERN_INVALID_ARGUMENT);
- }
+ pcb_stack_top = (uintptr_t) (iss32compat + 1);
+ /* require 16-byte alignment */
+ assert((pcb_stack_top & 0xF) == 0);
- if (flavor == i386_REGS_SEGS_STATE) {
- /*
- * Code and stack selectors must not be null,
- * and must have user protection levels.
- * Only the low 16 bits are valid.
- */
- state->cs &= 0xffff;
- state->ss &= 0xffff;
- state->ds &= 0xffff;
- state->es &= 0xffff;
- state->fs &= 0xffff;
- state->gs &= 0xffff;
-
- if (!kernel_act &&
- (state->cs == 0 || (state->cs & SEL_PL) != SEL_PL_U
- || state->ss == 0 || (state->ss & SEL_PL) != SEL_PL_U))
- return KERN_INVALID_ARGUMENT;
- }
+ /*
+ * Set pointer to PCB's interrupt stack frame in cpu data.
+ * Used by debug trap handler.
+ */
+ isf = (vm_offset_t) &iss32compat->isf64;
+ cdp->cpu_uber.cu_isf = isf;
+
+ /* Top of temporary sysenter stack points to pcb stack */
+ *current_sstk64() = pcb_stack_top;
- state = (struct i386_new_thread_state *) tstate;
+ /* Interrupt stack is pcb */
+ current_ktss64()->rsp0 = pcb_stack_top;
- saved_state = USER_REGS(thr_act);
+ cdp->cpu_task_map = TASK_MAP_32BIT;
+ /* Precalculate pointers to syscall argument store, for use
+ * in the trampolines.
+ */
+ cdp->cpu_uber_arg_store = (vm_offset_t)get_bsduthreadarg(new);
+ cdp->cpu_uber_arg_store_valid = (vm_offset_t)&pcb->arg_store_valid;
+ pcb->arg_store_valid = 0;
/*
- * General registers
+ * Disable USER64_CS
+ * Enable USER_CS
*/
- saved_state->edi = state->edi;
- saved_state->esi = state->esi;
- saved_state->ebp = state->ebp;
- saved_state->uesp = state->uesp;
- saved_state->ebx = state->ebx;
- saved_state->edx = state->edx;
- saved_state->ecx = state->ecx;
- saved_state->eax = state->eax;
- saved_state->eip = state->eip;
- if (kernel_act)
- saved_state->efl = state->efl;
- else
- saved_state->efl = (state->efl & ~EFL_USER_CLEAR)
- | EFL_USER_SET;
+ ldt_desc_p(USER64_CS)->access &= ~ACC_PL_U;
+ ldt_desc_p(USER_CS)->access |= ACC_PL_U;
/*
- * Segment registers. Set differently in V8086 mode.
+ * Set the thread`s cthread (a.k.a pthread)
+ * For 32-bit user this involves setting the USER_CTHREAD
+ * descriptor in the LDT to point to the cthread data.
+ * The involves copying in the pre-initialized descriptor.
+ */
+ ldtp = (struct real_descriptor *)current_ldt();
+ ldtp[sel_idx(USER_CTHREAD)] = pcb->cthread_desc;
+ if (pcb->uldt_selector != 0)
+ ldtp[sel_idx(pcb->uldt_selector)] = pcb->uldt_desc;
+ cdp->cpu_uber.cu_user_gs_base = pcb->cthread_self;
+
+ /*
+ * Set the thread`s LDT or LDT entry.
*/
- if (state->efl & EFL_VM) {
- /*
- * Set V8086 mode segment registers.
- */
- saved_state->cs = state->cs & 0xffff;
- saved_state->ss = state->ss & 0xffff;
- saved_state->v86_segs.v86_ds = state->ds & 0xffff;
- saved_state->v86_segs.v86_es = state->es & 0xffff;
- saved_state->v86_segs.v86_fs = state->fs & 0xffff;
- saved_state->v86_segs.v86_gs = state->gs & 0xffff;
-
- /*
- * Zero protected mode segment registers.
- */
- saved_state->ds = 0;
- saved_state->es = 0;
- saved_state->fs = 0;
- saved_state->gs = 0;
-
- if (thr_act->mact.pcb->ims.v86s.int_table) {
+ if (new->task == TASK_NULL || new->task->i386_ldt == 0) {
/*
- * Hardware assist on.
+ * Use system LDT.
*/
- thr_act->mact.pcb->ims.v86s.flags =
- state->efl & (EFL_TF | EFL_IF);
- }
- }
- else if (flavor == i386_NEW_THREAD_STATE && !kernel_act) {
- /*
- * 386 mode. Set segment registers for flat
- * 32-bit address space.
- */
- saved_state->cs = USER_CS;
- saved_state->ss = USER_DS;
- saved_state->ds = USER_DS;
- saved_state->es = USER_DS;
- saved_state->fs = USER_DS;
- saved_state->gs = USER_DS;
- }
- else {
- /*
- * User setting segment registers.
- * Code and stack selectors have already been
- * checked. Others will be reset by 'iret'
- * if they are not valid.
- */
- saved_state->cs = state->cs;
- saved_state->ss = state->ss;
- saved_state->ds = state->ds;
- saved_state->es = state->es;
- saved_state->fs = state->fs;
- saved_state->gs = state->gs;
+ ml_cpu_set_ldt(KERNEL_LDT);
+ } else {
+ /*
+ * Task has its own LDT.
+ */
+ user_ldt_set(new);
}
- break;
- }
-
- case i386_FLOAT_STATE: {
+ }
- if (count < i386_FLOAT_STATE_COUNT)
- return(KERN_INVALID_ARGUMENT);
+ /*
+ * Bump the scheduler generation count in the commpage.
+ * This can be read by user code to detect its preemption.
+ */
+ commpage_sched_gen_inc();
+}
+#else
+static void
+act_machine_switch_pcb( thread_t new )
+{
+ pcb_t pcb = new->machine.pcb;
+ struct real_descriptor *ldtp;
+ vm_offset_t pcb_stack_top;
+ vm_offset_t hi_pcb_stack_top;
+ vm_offset_t hi_iss;
+ cpu_data_t *cdp = current_cpu_datap();
- return fpu_set_state(thr_act,(struct i386_float_state*)tstate);
- }
+ assert(new->kernel_stack != 0);
+ STACK_IEL(new->kernel_stack)->saved_state = pcb->iss;
- /*
- * Temporary - replace by i386_io_map
- */
- case i386_ISA_PORT_MAP_STATE: {
- register struct i386_isa_port_map_state *state;
- register iopb_tss_t tss;
+ if (!cpu_mode_is64bit()) {
+ x86_saved_state32_tagged_t *hi_iss32;
+ /*
+ * Save a pointer to the top of the "kernel" stack -
+ * actually the place in the PCB where a trap into
+ * kernel mode will push the registers.
+ */
+ hi_iss = (vm_offset_t)((unsigned long)
+ pmap_cpu_high_map_vaddr(cpu_number(), HIGH_CPU_ISS0) |
+ ((unsigned long)pcb->iss & PAGE_MASK));
- if (count < i386_ISA_PORT_MAP_STATE_COUNT)
- return(KERN_INVALID_ARGUMENT);
+ cdp->cpu_hi_iss = (void *)hi_iss;
- break;
- }
+ pmap_high_map(pcb->iss_pte0, HIGH_CPU_ISS0);
+ pmap_high_map(pcb->iss_pte1, HIGH_CPU_ISS1);
- case i386_V86_ASSIST_STATE:
- {
- register struct i386_v86_assist_state *state;
- vm_offset_t int_table;
- int int_count;
+ hi_iss32 = (x86_saved_state32_tagged_t *) hi_iss;
+ assert(hi_iss32->tag == x86_SAVED_STATE32);
- if (count < i386_V86_ASSIST_STATE_COUNT)
- return KERN_INVALID_ARGUMENT;
+ hi_pcb_stack_top = (int) (hi_iss32 + 1);
- state = (struct i386_v86_assist_state *) tstate;
- int_table = state->int_table;
- int_count = state->int_count;
+ /*
+ * For fast syscall, top of interrupt stack points to pcb stack
+ */
+ *(vm_offset_t *) current_sstk() = hi_pcb_stack_top;
- if (int_table >= VM_MAX_ADDRESS ||
- int_table +
- int_count * sizeof(struct v86_interrupt_table)
- > VM_MAX_ADDRESS)
- return KERN_INVALID_ARGUMENT;
+ current_ktss()->esp0 = hi_pcb_stack_top;
- thr_act->mact.pcb->ims.v86s.int_table = int_table;
- thr_act->mact.pcb->ims.v86s.int_count = int_count;
+ } else if (is_saved_state64(pcb->iss)) {
+ /*
+ * The test above is performed against the thread save state
+ * flavor and not task's 64-bit feature flag because of the
+ * thread/task 64-bit state divergence that can arise in
+ * task_set_64bit() x86: the task state is changed before
+ * the individual thread(s).
+ */
+ x86_saved_state64_tagged_t *iss64;
+ vm_offset_t isf;
- thr_act->mact.pcb->ims.v86s.flags =
- USER_REGS(thr_act)->efl & (EFL_TF | EFL_IF);
- break;
- }
+ assert(is_saved_state64(pcb->iss));
+
+ iss64 = (x86_saved_state64_tagged_t *) pcb->iss;
+
+ /*
+ * Set pointer to PCB's interrupt stack frame in cpu data.
+ * Used by syscall and double-fault trap handlers.
+ */
+ isf = (vm_offset_t) &iss64->state.isf;
+ cdp->cpu_uber.cu_isf = UBER64(isf);
+ pcb_stack_top = (vm_offset_t) (iss64 + 1);
+ /* require 16-byte alignment */
+ assert((pcb_stack_top & 0xF) == 0);
+ /* Interrupt stack is pcb */
+ current_ktss64()->rsp0 = UBER64(pcb_stack_top);
- case i386_THREAD_STATE: {
- struct i386_saved_state *saved_state;
- i386_thread_state_t *state25;
-
- saved_state = USER_REGS(thr_act);
- state25 = (i386_thread_state_t *)tstate;
-
- saved_state->eax = state25->eax;
- saved_state->ebx = state25->ebx;
- saved_state->ecx = state25->ecx;
- saved_state->edx = state25->edx;
- saved_state->edi = state25->edi;
- saved_state->esi = state25->esi;
- saved_state->ebp = state25->ebp;
- saved_state->uesp = state25->esp;
- saved_state->efl = (state25->eflags & ~EFL_USER_CLEAR)
- | EFL_USER_SET;
- saved_state->eip = state25->eip;
- saved_state->cs = USER_CS; /* FIXME? */
- saved_state->ss = USER_DS;
- saved_state->ds = USER_DS;
- saved_state->es = USER_DS;
- saved_state->fs = USER_DS;
- saved_state->gs = USER_DS;
- }
- break;
+ /*
+ * Top of temporary sysenter stack points to pcb stack.
+ * Although this is not normally used by 64-bit users,
+ * it needs to be set in case a sysenter is attempted.
+ */
+ *current_sstk64() = UBER64(pcb_stack_top);
- default:
- return(KERN_INVALID_ARGUMENT);
- }
+ cdp->cpu_task_map = new->map->pmap->pm_task_map;
+
+ /*
+ * Enable the 64-bit user code segment, USER64_CS.
+ * Disable the 32-bit user code segment, USER_CS.
+ */
+ ldt_desc_p(USER64_CS)->access |= ACC_PL_U;
+ ldt_desc_p(USER_CS)->access &= ~ACC_PL_U;
+
+ } else {
+ x86_saved_state_compat32_t *iss32compat;
+ vm_offset_t isf;
+
+ assert(is_saved_state32(pcb->iss));
+ iss32compat = (x86_saved_state_compat32_t *) pcb->iss;
+
+ pcb_stack_top = (int) (iss32compat + 1);
+ /* require 16-byte alignment */
+ assert((pcb_stack_top & 0xF) == 0);
+
+ /*
+ * Set pointer to PCB's interrupt stack frame in cpu data.
+ * Used by debug trap handler.
+ */
+ isf = (vm_offset_t) &iss32compat->isf64;
+ cdp->cpu_uber.cu_isf = UBER64(isf);
+
+ /* Top of temporary sysenter stack points to pcb stack */
+ *current_sstk64() = UBER64(pcb_stack_top);
+
+ /* Interrupt stack is pcb */
+ current_ktss64()->rsp0 = UBER64(pcb_stack_top);
+
+ cdp->cpu_task_map = TASK_MAP_32BIT;
+ /* Precalculate pointers to syscall argument store, for use
+ * in the trampolines.
+ */
+ cdp->cpu_uber_arg_store = UBER64((vm_offset_t)get_bsduthreadarg(new));
+ cdp->cpu_uber_arg_store_valid = UBER64((vm_offset_t)&pcb->arg_store_valid);
+ pcb->arg_store_valid = 0;
+
+ /*
+ * Disable USER64_CS
+ * Enable USER_CS
+ */
+ ldt_desc_p(USER64_CS)->access &= ~ACC_PL_U;
+ ldt_desc_p(USER_CS)->access |= ACC_PL_U;
+ }
+
+ /*
+ * Set the thread`s cthread (a.k.a pthread)
+ * For 32-bit user this involves setting the USER_CTHREAD
+ * descriptor in the LDT to point to the cthread data.
+ * The involves copying in the pre-initialized descriptor.
+ */
+ ldtp = (struct real_descriptor *)current_ldt();
+ ldtp[sel_idx(USER_CTHREAD)] = pcb->cthread_desc;
+ if (pcb->uldt_selector != 0)
+ ldtp[sel_idx(pcb->uldt_selector)] = pcb->uldt_desc;
+
+
+ /*
+ * For 64-bit, we additionally set the 64-bit User GS base
+ * address. On return to 64-bit user, the GS.Base MSR will be written.
+ */
+ cdp->cpu_uber.cu_user_gs_base = pcb->cthread_self;
+
+ /*
+ * Set the thread`s LDT or LDT entry.
+ */
+ if (new->task == TASK_NULL || new->task->i386_ldt == 0) {
+ /*
+ * Use system LDT.
+ */
+ ml_cpu_set_ldt(KERNEL_LDT);
+ } else {
+ /*
+ * Task has its own LDT.
+ */
+ user_ldt_set(new);
+ }
+
+ /*
+ * Bump the scheduler generation count in the commpage.
+ * This can be read by user code to detect its preemption.
+ */
+ commpage_sched_gen_inc();
+}
+#endif
+
+/*
+ * Switch to the first thread on a CPU.
+ */
+void
+machine_load_context(
+ thread_t new)
+{
+#if CONFIG_COUNTERS
+ machine_pmc_cswitch(NULL, new);
+#endif
+ new->machine.specFlags |= OnProc;
+ act_machine_switch_pcb(new);
+ Load_context(new);
+}
+
+/*
+ * Switch to a new thread.
+ * Save the old thread`s kernel state or continuation,
+ * and return it.
+ */
+thread_t
+machine_switch_context(
+ thread_t old,
+ thread_continue_t continuation,
+ thread_t new)
+{
+#if MACH_RT
+ assert(current_cpu_datap()->cpu_active_stack == old->kernel_stack);
+#endif
+#if CONFIG_COUNTERS
+ machine_pmc_cswitch(old, new);
+#endif
+ /*
+ * Save FP registers if in use.
+ */
+ fpu_save_context(old);
+
+
+ old->machine.specFlags &= ~OnProc;
+ new->machine.specFlags |= OnProc;
+
+ /*
+ * Monitor the stack depth and report new max,
+ * not worrying about races.
+ */
+ vm_offset_t depth = current_stack_depth();
+ if (depth > kernel_stack_depth_max) {
+ kernel_stack_depth_max = depth;
+ KERNEL_DEBUG_CONSTANT(
+ MACHDBG_CODE(DBG_MACH_SCHED, MACH_STACK_DEPTH),
+ (long) depth, 0, 0, 0, 0);
+ }
+
+ /*
+ * Switch address maps if need be, even if not switching tasks.
+ * (A server activation may be "borrowing" a client map.)
+ */
+ PMAP_SWITCH_CONTEXT(old, new, cpu_number())
+
+ /*
+ * Load the rest of the user state for the new thread
+ */
+ act_machine_switch_pcb(new);
+
+ return(Switch_context(old, continuation, new));
+}
+
+thread_t
+machine_processor_shutdown(
+ thread_t thread,
+ void (*doshutdown)(processor_t),
+ processor_t processor)
+{
+#if CONFIG_VMX
+ vmx_suspend();
+#endif
+ fpu_save_context(thread);
+ PMAP_SWITCH_CONTEXT(thread, processor->idle_thread, cpu_number());
+ return(Shutdown_context(thread, doshutdown, processor));
+}
+
+/*
+ * act_machine_sv_free
+ * release saveareas associated with an act. if flag is true, release
+ * user level savearea(s) too, else don't
+ */
+void
+act_machine_sv_free(__unused thread_t act, __unused int flag)
+{
+}
+
+
+/*
+ * This is where registers that are not normally specified by the mach-o
+ * file on an execve would be nullified, perhaps to avoid a covert channel.
+ */
+kern_return_t
+machine_thread_state_initialize(
+ thread_t thread)
+{
+ /*
+ * If there's an fpu save area, free it.
+ * The initialized state will then be lazily faulted-in, if required.
+ * And if we're target, re-arm the no-fpu trap.
+ */
+ if (thread->machine.pcb->ifps) {
+ (void) fpu_set_fxstate(thread, NULL);
+
+ if (thread == current_thread())
+ clear_fpu();
+ }
+
+ if (thread->machine.pcb->ids) {
+ zfree(ids_zone, thread->machine.pcb->ids);
+ thread->machine.pcb->ids = NULL;
+ }
+
+ return KERN_SUCCESS;
+}
+
+uint32_t
+get_eflags_exportmask(void)
+{
+ return EFL_USER_SET;
+}
+
+/*
+ * x86_SAVED_STATE32 - internal save/restore general register state on 32/64 bit processors
+ * for 32bit tasks only
+ * x86_SAVED_STATE64 - internal save/restore general register state on 64 bit processors
+ * for 64bit tasks only
+ * x86_THREAD_STATE32 - external set/get general register state on 32/64 bit processors
+ * for 32bit tasks only
+ * x86_THREAD_STATE64 - external set/get general register state on 64 bit processors
+ * for 64bit tasks only
+ * x86_SAVED_STATE - external set/get general register state on 32/64 bit processors
+ * for either 32bit or 64bit tasks
+ * x86_FLOAT_STATE32 - internal/external save/restore float and xmm state on 32/64 bit processors
+ * for 32bit tasks only
+ * x86_FLOAT_STATE64 - internal/external save/restore float and xmm state on 64 bit processors
+ * for 64bit tasks only
+ * x86_FLOAT_STATE - external save/restore float and xmm state on 32/64 bit processors
+ * for either 32bit or 64bit tasks
+ * x86_EXCEPTION_STATE32 - external get exception state on 32/64 bit processors
+ * for 32bit tasks only
+ * x86_EXCEPTION_STATE64 - external get exception state on 64 bit processors
+ * for 64bit tasks only
+ * x86_EXCEPTION_STATE - external get exception state on 323/64 bit processors
+ * for either 32bit or 64bit tasks
+ */
+
+
+static void
+get_exception_state64(thread_t thread, x86_exception_state64_t *es)
+{
+ x86_saved_state64_t *saved_state;
+
+ saved_state = USER_REGS64(thread);
+
+ es->trapno = saved_state->isf.trapno;
+ es->err = (typeof(es->err))saved_state->isf.err;
+ es->faultvaddr = saved_state->cr2;
+}
+
+static void
+get_exception_state32(thread_t thread, x86_exception_state32_t *es)
+{
+ x86_saved_state32_t *saved_state;
+
+ saved_state = USER_REGS32(thread);
+
+ es->trapno = saved_state->trapno;
+ es->err = saved_state->err;
+ es->faultvaddr = saved_state->cr2;
+}
+
+
+static int
+set_thread_state32(thread_t thread, x86_thread_state32_t *ts)
+{
+ x86_saved_state32_t *saved_state;
+
+
+ saved_state = USER_REGS32(thread);
+
+ /*
+ * Scrub segment selector values:
+ */
+ ts->cs = USER_CS;
+#ifdef __i386__
+ if (ts->ss == 0) ts->ss = USER_DS;
+ if (ts->ds == 0) ts->ds = USER_DS;
+ if (ts->es == 0) ts->es = USER_DS;
+#else /* __x86_64__ */
+ /*
+ * On a 64 bit kernel, we always override the data segments,
+ * as the actual selector numbers have changed. This also
+ * means that we don't support setting the data segments
+ * manually any more.
+ */
+ ts->ss = USER_DS;
+ ts->ds = USER_DS;
+ ts->es = USER_DS;
+#endif
+
+ /* Check segment selectors are safe */
+ if (!valid_user_segment_selectors(ts->cs,
+ ts->ss,
+ ts->ds,
+ ts->es,
+ ts->fs,
+ ts->gs))
+ return(KERN_INVALID_ARGUMENT);
+
+ saved_state->eax = ts->eax;
+ saved_state->ebx = ts->ebx;
+ saved_state->ecx = ts->ecx;
+ saved_state->edx = ts->edx;
+ saved_state->edi = ts->edi;
+ saved_state->esi = ts->esi;
+ saved_state->ebp = ts->ebp;
+ saved_state->uesp = ts->esp;
+ saved_state->efl = (ts->eflags & ~EFL_USER_CLEAR) | EFL_USER_SET;
+ saved_state->eip = ts->eip;
+ saved_state->cs = ts->cs;
+ saved_state->ss = ts->ss;
+ saved_state->ds = ts->ds;
+ saved_state->es = ts->es;
+ saved_state->fs = ts->fs;
+ saved_state->gs = ts->gs;
+
+ /*
+ * If the trace trap bit is being set,
+ * ensure that the user returns via iret
+ * - which is signaled thusly:
+ */
+ if ((saved_state->efl & EFL_TF) && saved_state->cs == SYSENTER_CS)
+ saved_state->cs = SYSENTER_TF_CS;
+
+ return(KERN_SUCCESS);
+}
+
+static int
+set_thread_state64(thread_t thread, x86_thread_state64_t *ts)
+{
+ x86_saved_state64_t *saved_state;
+
+
+ saved_state = USER_REGS64(thread);
+
+ if (!IS_USERADDR64_CANONICAL(ts->rsp) ||
+ !IS_USERADDR64_CANONICAL(ts->rip))
+ return(KERN_INVALID_ARGUMENT);
+
+ saved_state->r8 = ts->r8;
+ saved_state->r9 = ts->r9;
+ saved_state->r10 = ts->r10;
+ saved_state->r11 = ts->r11;
+ saved_state->r12 = ts->r12;
+ saved_state->r13 = ts->r13;
+ saved_state->r14 = ts->r14;
+ saved_state->r15 = ts->r15;
+ saved_state->rax = ts->rax;
+ saved_state->rbx = ts->rbx;
+ saved_state->rcx = ts->rcx;
+ saved_state->rdx = ts->rdx;
+ saved_state->rdi = ts->rdi;
+ saved_state->rsi = ts->rsi;
+ saved_state->rbp = ts->rbp;
+ saved_state->isf.rsp = ts->rsp;
+ saved_state->isf.rflags = (ts->rflags & ~EFL_USER_CLEAR) | EFL_USER_SET;
+ saved_state->isf.rip = ts->rip;
+ saved_state->isf.cs = USER64_CS;
+ saved_state->fs = (uint32_t)ts->fs;
+ saved_state->gs = (uint32_t)ts->gs;
return(KERN_SUCCESS);
}
+
+
+static void
+get_thread_state32(thread_t thread, x86_thread_state32_t *ts)
+{
+ x86_saved_state32_t *saved_state;
+
+
+ saved_state = USER_REGS32(thread);
+
+ ts->eax = saved_state->eax;
+ ts->ebx = saved_state->ebx;
+ ts->ecx = saved_state->ecx;
+ ts->edx = saved_state->edx;
+ ts->edi = saved_state->edi;
+ ts->esi = saved_state->esi;
+ ts->ebp = saved_state->ebp;
+ ts->esp = saved_state->uesp;
+ ts->eflags = saved_state->efl;
+ ts->eip = saved_state->eip;
+ ts->cs = saved_state->cs;
+ ts->ss = saved_state->ss;
+ ts->ds = saved_state->ds;
+ ts->es = saved_state->es;
+ ts->fs = saved_state->fs;
+ ts->gs = saved_state->gs;
+}
+
+
+static void
+get_thread_state64(thread_t thread, x86_thread_state64_t *ts)
+{
+ x86_saved_state64_t *saved_state;
+
+
+ saved_state = USER_REGS64(thread);
+
+ ts->r8 = saved_state->r8;
+ ts->r9 = saved_state->r9;
+ ts->r10 = saved_state->r10;
+ ts->r11 = saved_state->r11;
+ ts->r12 = saved_state->r12;
+ ts->r13 = saved_state->r13;
+ ts->r14 = saved_state->r14;
+ ts->r15 = saved_state->r15;
+ ts->rax = saved_state->rax;
+ ts->rbx = saved_state->rbx;
+ ts->rcx = saved_state->rcx;
+ ts->rdx = saved_state->rdx;
+ ts->rdi = saved_state->rdi;
+ ts->rsi = saved_state->rsi;
+ ts->rbp = saved_state->rbp;
+ ts->rsp = saved_state->isf.rsp;
+ ts->rflags = saved_state->isf.rflags;
+ ts->rip = saved_state->isf.rip;
+ ts->cs = saved_state->isf.cs;
+ ts->fs = saved_state->fs;
+ ts->gs = saved_state->gs;
+}
+
+
+void
+thread_set_wq_state32(thread_t thread, thread_state_t tstate)
+{
+ x86_thread_state32_t *state;
+ x86_saved_state32_t *saved_state;
+ thread_t curth = current_thread();
+ spl_t s=0;
+
+
+ saved_state = USER_REGS32(thread);
+
+ state = (x86_thread_state32_t *)tstate;
+
+ if (curth != thread) {
+ s = splsched();
+ thread_lock(thread);
+ }
+
+ saved_state->ebp = 0;
+ saved_state->eip = state->eip;
+ saved_state->eax = state->eax;
+ saved_state->ebx = state->ebx;
+ saved_state->ecx = state->ecx;
+ saved_state->edx = state->edx;
+ saved_state->edi = state->edi;
+ saved_state->esi = state->esi;
+ saved_state->uesp = state->esp;
+ saved_state->efl = EFL_USER_SET;
+
+ saved_state->cs = USER_CS;
+ saved_state->ss = USER_DS;
+ saved_state->ds = USER_DS;
+ saved_state->es = USER_DS;
+
+
+ if (curth != thread) {
+ thread_unlock(thread);
+ splx(s);
+ }
+}
+
+
+void
+thread_set_wq_state64(thread_t thread, thread_state_t tstate)
+{
+ x86_thread_state64_t *state;
+ x86_saved_state64_t *saved_state;
+ thread_t curth = current_thread();
+ spl_t s=0;
+
+
+ saved_state = USER_REGS64(thread);
+ state = (x86_thread_state64_t *)tstate;
+
+ if (curth != thread) {
+ s = splsched();
+ thread_lock(thread);
+ }
+
+ saved_state->rbp = 0;
+ saved_state->rdi = state->rdi;
+ saved_state->rsi = state->rsi;
+ saved_state->rdx = state->rdx;
+ saved_state->rcx = state->rcx;
+ saved_state->r8 = state->r8;
+ saved_state->r9 = state->r9;
+
+ saved_state->isf.rip = state->rip;
+ saved_state->isf.rsp = state->rsp;
+ saved_state->isf.cs = USER64_CS;
+ saved_state->isf.rflags = EFL_USER_SET;
+
+
+ if (curth != thread) {
+ thread_unlock(thread);
+ splx(s);
+ }
+}
+
+
+
+/*
+ * act_machine_set_state:
+ *
+ * Set the status of the specified thread.
+ */
+
+kern_return_t
+machine_thread_set_state(
+ thread_t thr_act,
+ thread_flavor_t flavor,
+ thread_state_t tstate,
+ mach_msg_type_number_t count)
+{
+ switch (flavor) {
+ case x86_SAVED_STATE32:
+ {
+ x86_saved_state32_t *state;
+ x86_saved_state32_t *saved_state;
+
+ if (count < x86_SAVED_STATE32_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ if (thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
+
+ state = (x86_saved_state32_t *) tstate;
+
+ /* Check segment selectors are safe */
+ if (!valid_user_segment_selectors(state->cs,
+ state->ss,
+ state->ds,
+ state->es,
+ state->fs,
+ state->gs))
+ return KERN_INVALID_ARGUMENT;
+
+
+ saved_state = USER_REGS32(thr_act);
+
+ /*
+ * General registers
+ */
+ saved_state->edi = state->edi;
+ saved_state->esi = state->esi;
+ saved_state->ebp = state->ebp;
+ saved_state->uesp = state->uesp;
+ saved_state->ebx = state->ebx;
+ saved_state->edx = state->edx;
+ saved_state->ecx = state->ecx;
+ saved_state->eax = state->eax;
+ saved_state->eip = state->eip;
+
+ saved_state->efl = (state->efl & ~EFL_USER_CLEAR) | EFL_USER_SET;
+
+ /*
+ * If the trace trap bit is being set,
+ * ensure that the user returns via iret
+ * - which is signaled thusly:
+ */
+ if ((saved_state->efl & EFL_TF) && state->cs == SYSENTER_CS)
+ state->cs = SYSENTER_TF_CS;
+
+ /*
+ * User setting segment registers.
+ * Code and stack selectors have already been
+ * checked. Others will be reset by 'iret'
+ * if they are not valid.
+ */
+ saved_state->cs = state->cs;
+ saved_state->ss = state->ss;
+ saved_state->ds = state->ds;
+ saved_state->es = state->es;
+ saved_state->fs = state->fs;
+ saved_state->gs = state->gs;
+
+ break;
+ }
+
+ case x86_SAVED_STATE64:
+ {
+ x86_saved_state64_t *state;
+ x86_saved_state64_t *saved_state;
+
+ if (count < x86_SAVED_STATE64_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ if (!thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
+
+ state = (x86_saved_state64_t *) tstate;
+
+ /* Verify that the supplied code segment selector is
+ * valid. In 64-bit mode, the FS and GS segment overrides
+ * use the FS.base and GS.base MSRs to calculate
+ * base addresses, and the trampolines don't directly
+ * restore the segment registers--hence they are no
+ * longer relevant for validation.
+ */
+ if (!valid_user_code_selector(state->isf.cs))
+ return KERN_INVALID_ARGUMENT;
+
+ /* Check pc and stack are canonical addresses */
+ if (!IS_USERADDR64_CANONICAL(state->isf.rsp) ||
+ !IS_USERADDR64_CANONICAL(state->isf.rip))
+ return KERN_INVALID_ARGUMENT;
+
+
+ saved_state = USER_REGS64(thr_act);
+
+ /*
+ * General registers
+ */
+ saved_state->r8 = state->r8;
+ saved_state->r9 = state->r9;
+ saved_state->r10 = state->r10;
+ saved_state->r11 = state->r11;
+ saved_state->r12 = state->r12;
+ saved_state->r13 = state->r13;
+ saved_state->r14 = state->r14;
+ saved_state->r15 = state->r15;
+ saved_state->rdi = state->rdi;
+ saved_state->rsi = state->rsi;
+ saved_state->rbp = state->rbp;
+ saved_state->rbx = state->rbx;
+ saved_state->rdx = state->rdx;
+ saved_state->rcx = state->rcx;
+ saved_state->rax = state->rax;
+ saved_state->isf.rsp = state->isf.rsp;
+ saved_state->isf.rip = state->isf.rip;
+
+ saved_state->isf.rflags = (state->isf.rflags & ~EFL_USER_CLEAR) | EFL_USER_SET;
+
+ /*
+ * User setting segment registers.
+ * Code and stack selectors have already been
+ * checked. Others will be reset by 'sys'
+ * if they are not valid.
+ */
+ saved_state->isf.cs = state->isf.cs;
+ saved_state->isf.ss = state->isf.ss;
+ saved_state->fs = state->fs;
+ saved_state->gs = state->gs;
+
+ break;
+ }
+
+ case x86_FLOAT_STATE32:
+ {
+ if (count != x86_FLOAT_STATE32_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ if (thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
+
+ return fpu_set_fxstate(thr_act, tstate);
+ }
+
+ case x86_FLOAT_STATE64:
+ {
+ if (count != x86_FLOAT_STATE64_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ if ( !thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
+
+ return fpu_set_fxstate(thr_act, tstate);
+ }
+
+ case x86_FLOAT_STATE:
+ {
+ x86_float_state_t *state;
+
+ if (count != x86_FLOAT_STATE_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ state = (x86_float_state_t *)tstate;
+ if (state->fsh.flavor == x86_FLOAT_STATE64 && state->fsh.count == x86_FLOAT_STATE64_COUNT &&
+ thread_is_64bit(thr_act)) {
+ return fpu_set_fxstate(thr_act, (thread_state_t)&state->ufs.fs64);
+ }
+ if (state->fsh.flavor == x86_FLOAT_STATE32 && state->fsh.count == x86_FLOAT_STATE32_COUNT &&
+ !thread_is_64bit(thr_act)) {
+ return fpu_set_fxstate(thr_act, (thread_state_t)&state->ufs.fs32);
+ }
+ return(KERN_INVALID_ARGUMENT);
+ }
+
+ case x86_THREAD_STATE32:
+ {
+ if (count != x86_THREAD_STATE32_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ if (thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
+
+ return set_thread_state32(thr_act, (x86_thread_state32_t *)tstate);
+ }
+
+ case x86_THREAD_STATE64:
+ {
+ if (count != x86_THREAD_STATE64_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ if (!thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
+
+ return set_thread_state64(thr_act, (x86_thread_state64_t *)tstate);
+
+ }
+ case x86_THREAD_STATE:
+ {
+ x86_thread_state_t *state;
+
+ if (count != x86_THREAD_STATE_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ state = (x86_thread_state_t *)tstate;
+
+ if (state->tsh.flavor == x86_THREAD_STATE64 &&
+ state->tsh.count == x86_THREAD_STATE64_COUNT &&
+ thread_is_64bit(thr_act)) {
+ return set_thread_state64(thr_act, &state->uts.ts64);
+ } else if (state->tsh.flavor == x86_THREAD_STATE32 &&
+ state->tsh.count == x86_THREAD_STATE32_COUNT &&
+ !thread_is_64bit(thr_act)) {
+ return set_thread_state32(thr_act, &state->uts.ts32);
+ } else
+ return(KERN_INVALID_ARGUMENT);
+
+ break;
+ }
+ case x86_DEBUG_STATE32:
+ {
+ x86_debug_state32_t *state;
+ kern_return_t ret;
+
+ if (thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
+
+ state = (x86_debug_state32_t *)tstate;
+
+ ret = set_debug_state32(thr_act, state);
+
+ return ret;
+ }
+ case x86_DEBUG_STATE64:
+ {
+ x86_debug_state64_t *state;
+ kern_return_t ret;
+
+ if (!thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
+
+ state = (x86_debug_state64_t *)tstate;
+
+ ret = set_debug_state64(thr_act, state);
+
+ return ret;
+ }
+ case x86_DEBUG_STATE:
+ {
+ x86_debug_state_t *state;
+ kern_return_t ret = KERN_INVALID_ARGUMENT;
+
+ if (count != x86_DEBUG_STATE_COUNT)
+ return (KERN_INVALID_ARGUMENT);
+
+ state = (x86_debug_state_t *)tstate;
+ if (state->dsh.flavor == x86_DEBUG_STATE64 &&
+ state->dsh.count == x86_DEBUG_STATE64_COUNT &&
+ thread_is_64bit(thr_act)) {
+ ret = set_debug_state64(thr_act, &state->uds.ds64);
+ }
+ else
+ if (state->dsh.flavor == x86_DEBUG_STATE32 &&
+ state->dsh.count == x86_DEBUG_STATE32_COUNT &&
+ !thread_is_64bit(thr_act)) {
+ ret = set_debug_state32(thr_act, &state->uds.ds32);
+ }
+ return ret;
+ }
+ default:
+ return(KERN_INVALID_ARGUMENT);
+ }
+
+ return(KERN_SUCCESS);
+}
+
+
+
/*
* thread_getstatus:
*
* Get the status of the specified thread.
*/
-
kern_return_t
-act_machine_get_state(
- thread_act_t thr_act,
+machine_thread_get_state(
+ thread_t thr_act,
thread_flavor_t flavor,
thread_state_t tstate,
mach_msg_type_number_t *count)
{
-#if MACH_ASSERT
- if (watchacts & WA_STATE)
- printf("act_%x act_m_get_state(thr_act=%x,flav=%x,st=%x,cnt@%x=%x)\n",
- current_act(), thr_act, flavor, tstate,
- count, (count ? *count : 0));
-#endif /* MACH_ASSERT */
switch (flavor) {
- case i386_SAVED_STATE:
+ case THREAD_STATE_FLAVOR_LIST:
+ {
+ if (*count < 3)
+ return (KERN_INVALID_ARGUMENT);
+
+ tstate[0] = i386_THREAD_STATE;
+ tstate[1] = i386_FLOAT_STATE;
+ tstate[2] = i386_EXCEPTION_STATE;
+
+ *count = 3;
+ break;
+ }
+
+ case THREAD_STATE_FLAVOR_LIST_NEW:
{
- register struct i386_saved_state *state;
- register struct i386_saved_state *saved_state;
+ if (*count < 4)
+ return (KERN_INVALID_ARGUMENT);
+
+ tstate[0] = x86_THREAD_STATE;
+ tstate[1] = x86_FLOAT_STATE;
+ tstate[2] = x86_EXCEPTION_STATE;
+ tstate[3] = x86_DEBUG_STATE;
- if (*count < i386_SAVED_STATE_COUNT)
- return(KERN_INVALID_ARGUMENT);
+ *count = 4;
+ break;
+ }
+
+ case x86_SAVED_STATE32:
+ {
+ x86_saved_state32_t *state;
+ x86_saved_state32_t *saved_state;
+
+ if (*count < x86_SAVED_STATE32_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ if (thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
- state = (struct i386_saved_state *) tstate;
- saved_state = USER_REGS(thr_act);
+ state = (x86_saved_state32_t *) tstate;
+ saved_state = USER_REGS32(thr_act);
/*
* First, copy everything:
*/
*state = *saved_state;
+ state->ds = saved_state->ds & 0xffff;
+ state->es = saved_state->es & 0xffff;
+ state->fs = saved_state->fs & 0xffff;
+ state->gs = saved_state->gs & 0xffff;
- if (saved_state->efl & EFL_VM) {
- /*
- * V8086 mode.
- */
- state->ds = saved_state->v86_segs.v86_ds & 0xffff;
- state->es = saved_state->v86_segs.v86_es & 0xffff;
- state->fs = saved_state->v86_segs.v86_fs & 0xffff;
- state->gs = saved_state->v86_segs.v86_gs & 0xffff;
+ *count = x86_SAVED_STATE32_COUNT;
+ break;
+ }
- if (thr_act->mact.pcb->ims.v86s.int_table) {
- /*
- * Hardware assist on
- */
- if ((thr_act->mact.pcb->ims.v86s.flags &
- (EFL_IF|V86_IF_PENDING)) == 0)
- state->efl &= ~EFL_IF;
- }
- }
- else {
- /*
- * 386 mode.
- */
- state->ds = saved_state->ds & 0xffff;
- state->es = saved_state->es & 0xffff;
- state->fs = saved_state->fs & 0xffff;
- state->gs = saved_state->gs & 0xffff;
- }
- *count = i386_SAVED_STATE_COUNT;
+ case x86_SAVED_STATE64:
+ {
+ x86_saved_state64_t *state;
+ x86_saved_state64_t *saved_state;
+
+ if (*count < x86_SAVED_STATE64_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ if (!thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
+
+ state = (x86_saved_state64_t *)tstate;
+ saved_state = USER_REGS64(thr_act);
+
+ /*
+ * First, copy everything:
+ */
+ *state = *saved_state;
+ state->fs = saved_state->fs & 0xffff;
+ state->gs = saved_state->gs & 0xffff;
+
+ *count = x86_SAVED_STATE64_COUNT;
break;
}
- case i386_NEW_THREAD_STATE:
- case i386_REGS_SEGS_STATE:
+ case x86_FLOAT_STATE32:
+ {
+ if (*count < x86_FLOAT_STATE32_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ if (thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
+
+ *count = x86_FLOAT_STATE32_COUNT;
+
+ return fpu_get_fxstate(thr_act, tstate);
+ }
+
+ case x86_FLOAT_STATE64:
{
- register struct i386_new_thread_state *state;
- register struct i386_saved_state *saved_state;
+ if (*count < x86_FLOAT_STATE64_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ if ( !thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
- if (*count < i386_NEW_THREAD_STATE_COUNT)
- return(KERN_INVALID_ARGUMENT);
+ *count = x86_FLOAT_STATE64_COUNT;
- state = (struct i386_new_thread_state *) tstate;
- saved_state = USER_REGS(thr_act);
+ return fpu_get_fxstate(thr_act, tstate);
+ }
+
+ case x86_FLOAT_STATE:
+ {
+ x86_float_state_t *state;
+ kern_return_t kret;
+
+ if (*count < x86_FLOAT_STATE_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ state = (x86_float_state_t *)tstate;
/*
- * General registers.
+ * no need to bzero... currently
+ * x86_FLOAT_STATE64_COUNT == x86_FLOAT_STATE32_COUNT
*/
- state->edi = saved_state->edi;
- state->esi = saved_state->esi;
- state->ebp = saved_state->ebp;
- state->ebx = saved_state->ebx;
- state->edx = saved_state->edx;
- state->ecx = saved_state->ecx;
- state->eax = saved_state->eax;
- state->eip = saved_state->eip;
- state->efl = saved_state->efl;
- state->uesp = saved_state->uesp;
+ if (thread_is_64bit(thr_act)) {
+ state->fsh.flavor = x86_FLOAT_STATE64;
+ state->fsh.count = x86_FLOAT_STATE64_COUNT;
- state->cs = saved_state->cs;
- state->ss = saved_state->ss;
- if (saved_state->efl & EFL_VM) {
- /*
- * V8086 mode.
- */
- state->ds = saved_state->v86_segs.v86_ds & 0xffff;
- state->es = saved_state->v86_segs.v86_es & 0xffff;
- state->fs = saved_state->v86_segs.v86_fs & 0xffff;
- state->gs = saved_state->v86_segs.v86_gs & 0xffff;
-
- if (thr_act->mact.pcb->ims.v86s.int_table) {
- /*
- * Hardware assist on
- */
- if ((thr_act->mact.pcb->ims.v86s.flags &
- (EFL_IF|V86_IF_PENDING)) == 0)
- state->efl &= ~EFL_IF;
- }
+ kret = fpu_get_fxstate(thr_act, (thread_state_t)&state->ufs.fs64);
+ } else {
+ state->fsh.flavor = x86_FLOAT_STATE32;
+ state->fsh.count = x86_FLOAT_STATE32_COUNT;
+
+ kret = fpu_get_fxstate(thr_act, (thread_state_t)&state->ufs.fs32);
}
- else {
- /*
- * 386 mode.
- */
- state->ds = saved_state->ds & 0xffff;
- state->es = saved_state->es & 0xffff;
- state->fs = saved_state->fs & 0xffff;
- state->gs = saved_state->gs & 0xffff;
+ *count = x86_FLOAT_STATE_COUNT;
+
+ return(kret);
+ }
+
+ case x86_THREAD_STATE32:
+ {
+ if (*count < x86_THREAD_STATE32_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ if (thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
+
+ *count = x86_THREAD_STATE32_COUNT;
+
+ get_thread_state32(thr_act, (x86_thread_state32_t *)tstate);
+ break;
+ }
+
+ case x86_THREAD_STATE64:
+ {
+ if (*count < x86_THREAD_STATE64_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ if ( !thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
+
+ *count = x86_THREAD_STATE64_COUNT;
+
+ get_thread_state64(thr_act, (x86_thread_state64_t *)tstate);
+ break;
+ }
+
+ case x86_THREAD_STATE:
+ {
+ x86_thread_state_t *state;
+
+ if (*count < x86_THREAD_STATE_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ state = (x86_thread_state_t *)tstate;
+
+ bzero((char *)state, sizeof(x86_thread_state_t));
+
+ if (thread_is_64bit(thr_act)) {
+ state->tsh.flavor = x86_THREAD_STATE64;
+ state->tsh.count = x86_THREAD_STATE64_COUNT;
+
+ get_thread_state64(thr_act, &state->uts.ts64);
+ } else {
+ state->tsh.flavor = x86_THREAD_STATE32;
+ state->tsh.count = x86_THREAD_STATE32_COUNT;
+
+ get_thread_state32(thr_act, &state->uts.ts32);
}
- *count = i386_NEW_THREAD_STATE_COUNT;
+ *count = x86_THREAD_STATE_COUNT;
+
break;
}
- case THREAD_SYSCALL_STATE:
+
+ case x86_EXCEPTION_STATE32:
{
- register struct thread_syscall_state *state;
- register struct i386_saved_state *saved_state = USER_REGS(thr_act);
+ if (*count < x86_EXCEPTION_STATE32_COUNT)
+ return(KERN_INVALID_ARGUMENT);
- state = (struct thread_syscall_state *) tstate;
- state->eax = saved_state->eax;
- state->edx = saved_state->edx;
- state->efl = saved_state->efl;
- state->eip = saved_state->eip;
- state->esp = saved_state->uesp;
- *count = i386_THREAD_SYSCALL_STATE_COUNT;
- break;
- }
+ if (thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
- case THREAD_STATE_FLAVOR_LIST:
- if (*count < 5)
- return (KERN_INVALID_ARGUMENT);
- tstate[0] = i386_NEW_THREAD_STATE;
- tstate[1] = i386_FLOAT_STATE;
- tstate[2] = i386_ISA_PORT_MAP_STATE;
- tstate[3] = i386_V86_ASSIST_STATE;
- tstate[4] = THREAD_SYSCALL_STATE;
- *count = 5;
+ *count = x86_EXCEPTION_STATE32_COUNT;
+
+ get_exception_state32(thr_act, (x86_exception_state32_t *)tstate);
break;
+ }
- case i386_FLOAT_STATE: {
+ case x86_EXCEPTION_STATE64:
+ {
+ if (*count < x86_EXCEPTION_STATE64_COUNT)
+ return(KERN_INVALID_ARGUMENT);
- if (*count < i386_FLOAT_STATE_COUNT)
+ if ( !thread_is_64bit(thr_act))
return(KERN_INVALID_ARGUMENT);
- *count = i386_FLOAT_STATE_COUNT;
- return fpu_get_state(thr_act,(struct i386_float_state *)tstate);
+ *count = x86_EXCEPTION_STATE64_COUNT;
+
+ get_exception_state64(thr_act, (x86_exception_state64_t *)tstate);
+ break;
}
- /*
- * Temporary - replace by i386_io_map
- */
- case i386_ISA_PORT_MAP_STATE: {
- register struct i386_isa_port_map_state *state;
- register iopb_tss_t tss;
+ case x86_EXCEPTION_STATE:
+ {
+ x86_exception_state_t *state;
- if (*count < i386_ISA_PORT_MAP_STATE_COUNT)
+ if (*count < x86_EXCEPTION_STATE_COUNT)
return(KERN_INVALID_ARGUMENT);
- state = (struct i386_isa_port_map_state *) tstate;
- tss = thr_act->mact.pcb->ims.io_tss;
+ state = (x86_exception_state_t *)tstate;
- if (tss == 0) {
- int i;
+ bzero((char *)state, sizeof(x86_exception_state_t));
- /*
- * The thread has no ktss, so no IO permissions.
- */
+ if (thread_is_64bit(thr_act)) {
+ state->esh.flavor = x86_EXCEPTION_STATE64;
+ state->esh.count = x86_EXCEPTION_STATE64_COUNT;
- for (i = 0; i < sizeof state->pm; i++)
- state->pm[i] = 0xff;
+ get_exception_state64(thr_act, &state->ues.es64);
} else {
- /*
- * The thread has its own ktss.
- */
+ state->esh.flavor = x86_EXCEPTION_STATE32;
+ state->esh.count = x86_EXCEPTION_STATE32_COUNT;
- bcopy((char *) tss->bitmap,
- (char *) state->pm,
- sizeof state->pm);
+ get_exception_state32(thr_act, &state->ues.es32);
}
+ *count = x86_EXCEPTION_STATE_COUNT;
- *count = i386_ISA_PORT_MAP_STATE_COUNT;
break;
- }
+ }
+ case x86_DEBUG_STATE32:
+ {
+ if (*count < x86_DEBUG_STATE32_COUNT)
+ return(KERN_INVALID_ARGUMENT);
- case i386_V86_ASSIST_STATE:
- {
- register struct i386_v86_assist_state *state;
+ if (thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
- if (*count < i386_V86_ASSIST_STATE_COUNT)
- return KERN_INVALID_ARGUMENT;
+ get_debug_state32(thr_act, (x86_debug_state32_t *)tstate);
- state = (struct i386_v86_assist_state *) tstate;
- state->int_table = thr_act->mact.pcb->ims.v86s.int_table;
- state->int_count = thr_act->mact.pcb->ims.v86s.int_count;
+ *count = x86_DEBUG_STATE32_COUNT;
- *count = i386_V86_ASSIST_STATE_COUNT;
break;
- }
+ }
+ case x86_DEBUG_STATE64:
+ {
+ if (*count < x86_DEBUG_STATE64_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ if (!thread_is_64bit(thr_act))
+ return(KERN_INVALID_ARGUMENT);
- case i386_THREAD_STATE: {
- struct i386_saved_state *saved_state;
- i386_thread_state_t *state;
+ get_debug_state64(thr_act, (x86_debug_state64_t *)tstate);
- saved_state = USER_REGS(thr_act);
- state = (i386_thread_state_t *)tstate;
+ *count = x86_DEBUG_STATE64_COUNT;
- state->eax = saved_state->eax;
- state->ebx = saved_state->ebx;
- state->ecx = saved_state->ecx;
- state->edx = saved_state->edx;
- state->edi = saved_state->edi;
- state->esi = saved_state->esi;
- state->ebp = saved_state->ebp;
- state->esp = saved_state->uesp;
- state->eflags = saved_state->efl;
- state->eip = saved_state->eip;
- state->cs = saved_state->cs;
- state->ss = saved_state->ss;
- state->ds = saved_state->ds;
- state->es = saved_state->es;
- state->fs = saved_state->fs;
- state->gs = saved_state->gs;
break;
}
+ case x86_DEBUG_STATE:
+ {
+ x86_debug_state_t *state;
+
+ if (*count < x86_DEBUG_STATE_COUNT)
+ return(KERN_INVALID_ARGUMENT);
+
+ state = (x86_debug_state_t *)tstate;
+
+ bzero(state, sizeof *state);
+
+ if (thread_is_64bit(thr_act)) {
+ state->dsh.flavor = x86_DEBUG_STATE64;
+ state->dsh.count = x86_DEBUG_STATE64_COUNT;
+
+ get_debug_state64(thr_act, &state->uds.ds64);
+ } else {
+ state->dsh.flavor = x86_DEBUG_STATE32;
+ state->dsh.count = x86_DEBUG_STATE32_COUNT;
- default:
+ get_debug_state32(thr_act, &state->uds.ds32);
+ }
+ *count = x86_DEBUG_STATE_COUNT;
+ break;
+ }
+ default:
return(KERN_INVALID_ARGUMENT);
}
return(KERN_SUCCESS);
}
-/*
- * Alter the thread`s state so that a following thread_exception_return
- * will make the thread return 'retval' from a syscall.
- */
-void
-thread_set_syscall_return(
- thread_t thread,
- kern_return_t retval)
+kern_return_t
+machine_thread_get_kern_state(
+ thread_t thread,
+ thread_flavor_t flavor,
+ thread_state_t tstate,
+ mach_msg_type_number_t *count)
{
- thread->top_act->mact.pcb->iss.eax = retval;
+ x86_saved_state_t *int_state = current_cpu_datap()->cpu_int_state;
+
+ /*
+ * This works only for an interrupted kernel thread
+ */
+ if (thread != current_thread() || int_state == NULL)
+ return KERN_FAILURE;
+
+ switch (flavor) {
+ case x86_THREAD_STATE32: {
+ x86_thread_state32_t *state;
+ x86_saved_state32_t *saved_state;
+
+ if (!is_saved_state32(int_state) ||
+ *count < x86_THREAD_STATE32_COUNT)
+ return (KERN_INVALID_ARGUMENT);
+
+ state = (x86_thread_state32_t *) tstate;
+
+ saved_state = saved_state32(int_state);
+ /*
+ * General registers.
+ */
+ state->eax = saved_state->eax;
+ state->ebx = saved_state->ebx;
+ state->ecx = saved_state->ecx;
+ state->edx = saved_state->edx;
+ state->edi = saved_state->edi;
+ state->esi = saved_state->esi;
+ state->ebp = saved_state->ebp;
+ state->esp = saved_state->uesp;
+ state->eflags = saved_state->efl;
+ state->eip = saved_state->eip;
+ state->cs = saved_state->cs;
+ state->ss = saved_state->ss;
+ state->ds = saved_state->ds & 0xffff;
+ state->es = saved_state->es & 0xffff;
+ state->fs = saved_state->fs & 0xffff;
+ state->gs = saved_state->gs & 0xffff;
+
+ *count = x86_THREAD_STATE32_COUNT;
+
+ return KERN_SUCCESS;
+ }
+
+ case x86_THREAD_STATE64: {
+ x86_thread_state64_t *state;
+ x86_saved_state64_t *saved_state;
+
+ if (!is_saved_state64(int_state) ||
+ *count < x86_THREAD_STATE64_COUNT)
+ return (KERN_INVALID_ARGUMENT);
+
+ state = (x86_thread_state64_t *) tstate;
+
+ saved_state = saved_state64(int_state);
+ /*
+ * General registers.
+ */
+ state->rax = saved_state->rax;
+ state->rbx = saved_state->rbx;
+ state->rcx = saved_state->rcx;
+ state->rdx = saved_state->rdx;
+ state->rdi = saved_state->rdi;
+ state->rsi = saved_state->rsi;
+ state->rbp = saved_state->rbp;
+ state->rsp = saved_state->isf.rsp;
+ state->r8 = saved_state->r8;
+ state->r9 = saved_state->r9;
+ state->r10 = saved_state->r10;
+ state->r11 = saved_state->r11;
+ state->r12 = saved_state->r12;
+ state->r13 = saved_state->r13;
+ state->r14 = saved_state->r14;
+ state->r15 = saved_state->r15;
+
+ state->rip = saved_state->isf.rip;
+ state->rflags = saved_state->isf.rflags;
+ state->cs = saved_state->isf.cs;
+ state->fs = saved_state->fs & 0xffff;
+ state->gs = saved_state->gs & 0xffff;
+ *count = x86_THREAD_STATE64_COUNT;
+
+ return KERN_SUCCESS;
+ }
+
+ case x86_THREAD_STATE: {
+ x86_thread_state_t *state = NULL;
+
+ if (*count < x86_THREAD_STATE_COUNT)
+ return (KERN_INVALID_ARGUMENT);
+
+ state = (x86_thread_state_t *) tstate;
+
+ if (is_saved_state32(int_state)) {
+ x86_saved_state32_t *saved_state = saved_state32(int_state);
+
+ state->tsh.flavor = x86_THREAD_STATE32;
+ state->tsh.count = x86_THREAD_STATE32_COUNT;
+
+ /*
+ * General registers.
+ */
+ state->uts.ts32.eax = saved_state->eax;
+ state->uts.ts32.ebx = saved_state->ebx;
+ state->uts.ts32.ecx = saved_state->ecx;
+ state->uts.ts32.edx = saved_state->edx;
+ state->uts.ts32.edi = saved_state->edi;
+ state->uts.ts32.esi = saved_state->esi;
+ state->uts.ts32.ebp = saved_state->ebp;
+ state->uts.ts32.esp = saved_state->uesp;
+ state->uts.ts32.eflags = saved_state->efl;
+ state->uts.ts32.eip = saved_state->eip;
+ state->uts.ts32.cs = saved_state->cs;
+ state->uts.ts32.ss = saved_state->ss;
+ state->uts.ts32.ds = saved_state->ds & 0xffff;
+ state->uts.ts32.es = saved_state->es & 0xffff;
+ state->uts.ts32.fs = saved_state->fs & 0xffff;
+ state->uts.ts32.gs = saved_state->gs & 0xffff;
+ } else if (is_saved_state64(int_state)) {
+ x86_saved_state64_t *saved_state = saved_state64(int_state);
+
+ state->tsh.flavor = x86_THREAD_STATE64;
+ state->tsh.count = x86_THREAD_STATE64_COUNT;
+
+ /*
+ * General registers.
+ */
+ state->uts.ts64.rax = saved_state->rax;
+ state->uts.ts64.rbx = saved_state->rbx;
+ state->uts.ts64.rcx = saved_state->rcx;
+ state->uts.ts64.rdx = saved_state->rdx;
+ state->uts.ts64.rdi = saved_state->rdi;
+ state->uts.ts64.rsi = saved_state->rsi;
+ state->uts.ts64.rbp = saved_state->rbp;
+ state->uts.ts64.rsp = saved_state->isf.rsp;
+ state->uts.ts64.r8 = saved_state->r8;
+ state->uts.ts64.r9 = saved_state->r9;
+ state->uts.ts64.r10 = saved_state->r10;
+ state->uts.ts64.r11 = saved_state->r11;
+ state->uts.ts64.r12 = saved_state->r12;
+ state->uts.ts64.r13 = saved_state->r13;
+ state->uts.ts64.r14 = saved_state->r14;
+ state->uts.ts64.r15 = saved_state->r15;
+
+ state->uts.ts64.rip = saved_state->isf.rip;
+ state->uts.ts64.rflags = saved_state->isf.rflags;
+ state->uts.ts64.cs = saved_state->isf.cs;
+ state->uts.ts64.fs = saved_state->fs & 0xffff;
+ state->uts.ts64.gs = saved_state->gs & 0xffff;
+ } else {
+ panic("unknown thread state");
+ }
+
+ *count = x86_THREAD_STATE_COUNT;
+ return KERN_SUCCESS;
+ }
+ }
+ return KERN_FAILURE;
}
+
/*
* Initialize the machine-dependent state for a new thread.
*/
kern_return_t
-thread_machine_create(thread_t thread, thread_act_t thr_act, void (*start_pos)(thread_t))
+machine_thread_create(
+ thread_t thread,
+ task_t task)
{
- MachineThrAct_t mact = &thr_act->mact;
+ pcb_t pcb = &thread->machine.xxx_pcb;
+ x86_saved_state_t *iss;
-#if MACH_ASSERT
- if (watchacts & WA_PCB)
- printf("thread_machine_create(thr=%x,thr_act=%x,st=%x)\n",
- thread, thr_act, start_pos);
-#endif /* MACH_ASSERT */
+#if NCOPY_WINDOWS > 0
+ inval_copy_windows(thread);
- assert(thread != NULL);
- assert(thr_act != NULL);
+ thread->machine.physwindow_pte = 0;
+ thread->machine.physwindow_busy = 0;
+#endif
/*
- * Allocate a kernel stack per shuttle
+ * Allocate pcb only if required.
*/
- thread->kernel_stack = (int)stack_alloc(thread,start_pos);
- thread->state &= ~TH_STACK_HANDOFF;
- assert(thread->kernel_stack != 0);
+ if (pcb->sf == NULL) {
+ pcb->sf = zalloc(iss_zone);
+ if (pcb->sf == NULL)
+ panic("iss_zone");
+ }
- /*
- * Point top of kernel stack to user`s registers.
- */
- STACK_IEL(thread->kernel_stack)->saved_state = &mact->pcb->iss;
+ if (task_has_64BitAddr(task)) {
+ x86_sframe64_t *sf64;
- return(KERN_SUCCESS);
-}
+ sf64 = (x86_sframe64_t *) pcb->sf;
-/*
- * Machine-dependent cleanup prior to destroying a thread
- */
-void
-thread_machine_destroy( thread_t thread )
-{
- spl_t s;
+ bzero((char *)sf64, sizeof(x86_sframe64_t));
+
+ iss = (x86_saved_state_t *) &sf64->ssf;
+ iss->flavor = x86_SAVED_STATE64;
+ /*
+ * Guarantee that the bootstrapped thread will be in user
+ * mode.
+ */
+ iss->ss_64.isf.rflags = EFL_USER_SET;
+ iss->ss_64.isf.cs = USER64_CS;
+ iss->ss_64.isf.ss = USER_DS;
+ iss->ss_64.fs = USER_DS;
+ iss->ss_64.gs = USER_DS;
+ } else {
+ if (cpu_mode_is64bit()) {
+ x86_sframe_compat32_t *sfc32;
+
+ sfc32 = (x86_sframe_compat32_t *)pcb->sf;
+
+ bzero((char *)sfc32, sizeof(x86_sframe_compat32_t));
+
+ iss = (x86_saved_state_t *) &sfc32->ssf.iss32;
+ iss->flavor = x86_SAVED_STATE32;
+#if defined(__i386__)
+#if DEBUG
+ {
+ x86_saved_state_compat32_t *xssc;
+
+ xssc = (x86_saved_state_compat32_t *) iss;
+
+ xssc->pad_for_16byte_alignment[0] = 0x64326432;
+ xssc->pad_for_16byte_alignment[1] = 0x64326432;
+ }
+#endif /* DEBUG */
+ } else {
+ x86_sframe32_t *sf32;
+ struct real_descriptor *ldtp;
+ pmap_paddr_t paddr;
+
+ sf32 = (x86_sframe32_t *) pcb->sf;
+
+ bzero((char *)sf32, sizeof(x86_sframe32_t));
+
+ iss = (x86_saved_state_t *) &sf32->ssf;
+ iss->flavor = x86_SAVED_STATE32;
+ pcb->iss_pte0 = pte_kernel_rw(kvtophys((vm_offset_t)iss));
+ if (0 == (paddr = pa_to_pte(kvtophys((vm_offset_t)iss + PAGE_SIZE))))
+ pcb->iss_pte1 = INTEL_PTE_INVALID;
+ else
+ pcb->iss_pte1 = pte_kernel_rw(paddr);
+
+
+ ldtp = (struct real_descriptor *)
+ pmap_index_to_virt(HIGH_FIXED_LDT_BEGIN);
+ pcb->cthread_desc = ldtp[sel_idx(USER_DS)];
+ pcb->uldt_desc = ldtp[sel_idx(USER_DS)];
+#endif /* __i386__ */
+ }
+ /*
+ * Guarantee that the bootstrapped thread will be in user
+ * mode.
+ */
+ iss->ss_32.cs = USER_CS;
+ iss->ss_32.ss = USER_DS;
+ iss->ss_32.ds = USER_DS;
+ iss->ss_32.es = USER_DS;
+ iss->ss_32.fs = USER_DS;
+ iss->ss_32.gs = USER_DS;
+ iss->ss_32.efl = EFL_USER_SET;
- if (thread->kernel_stack != 0) {
- s = splsched();
- stack_free(thread);
- splx(s);
}
-}
+ pcb->iss = iss;
-/*
- * This is used to set the current thr_act/thread
- * when starting up a new processor
- */
-void
-thread_machine_set_current( thread_t thread )
-{
- register int my_cpu;
+ thread->machine.pcb = pcb;
+ simple_lock_init(&pcb->lock, 0);
- mp_disable_preemption();
- my_cpu = cpu_number();
+ pcb->arg_store_valid = 0;
+ pcb->cthread_self = 0;
+ pcb->uldt_selector = 0;
- cpu_data[my_cpu].active_thread = thread;
- active_kloaded[my_cpu] =
- thread->top_act->kernel_loaded ? thread->top_act : THR_ACT_NULL;
- mp_enable_preemption();
+ return(KERN_SUCCESS);
}
-
/*
- * Pool of kernel activations.
+ * Machine-dependent cleanup prior to destroying a thread
*/
-
-void act_machine_init()
+void
+machine_thread_destroy(
+ thread_t thread)
{
- int i;
- thread_act_t thr_act;
+ register pcb_t pcb = thread->machine.pcb;
-#if MACH_ASSERT
- if (watchacts & WA_PCB)
- printf("act_machine_init()\n");
-#endif /* MACH_ASSERT */
+ assert(pcb);
+
+ if (pcb->ifps != 0)
+ fpu_free(pcb->ifps);
+ if (pcb->sf != 0) {
+ zfree(iss_zone, pcb->sf);
+ pcb->sf = 0;
+ }
+ if (pcb->ids) {
+ zfree(ids_zone, pcb->ids);
+ pcb->ids = NULL;
+ }
+ thread->machine.pcb = (pcb_t)0;
- /* Good to verify this once */
- assert( THREAD_MACHINE_STATE_MAX <= THREAD_STATE_MAX );
}
-kern_return_t
-act_machine_create(task_t task, thread_act_t thr_act)
+void
+machine_thread_switch_addrmode(thread_t thread)
{
- MachineThrAct_t mact = &thr_act->mact;
- pcb_t pcb;
-
-#if MACH_ASSERT
- if (watchacts & WA_PCB)
- printf("act_machine_create(task=%x,thr_act=%x) pcb=%x\n",
- task,thr_act, &mact->xxx_pcb);
-#endif /* MACH_ASSERT */
-
/*
- * Clear & Init the pcb (sets up user-mode s regs)
+ * We don't want to be preempted until we're done
+ * - particularly if we're switching the current thread
*/
- pcb_init(thr_act);
+ disable_preemption();
- return KERN_SUCCESS;
+ /*
+ * Reset the state saveareas.
+ */
+ machine_thread_create(thread, thread->task);
+
+ /* If we're switching ourselves, reset the pcb addresses etc. */
+ if (thread == current_thread()) {
+#if defined(__i386__)
+ if (current_cpu_datap()->cpu_active_cr3 != kernel_pmap->pm_cr3)
+ pmap_load_kernel_cr3();
+#endif /* defined(__i386) */
+ act_machine_switch_pcb(thread);
+ }
+ enable_preemption();
}
+
+
+/*
+ * This is used to set the current thr_act/thread
+ * when starting up a new processor
+ */
void
-act_virtual_machine_destroy(thread_act_t thr_act)
+machine_set_current_thread(thread_t thread)
{
- return;
+ current_cpu_datap()->cpu_active_thread = thread;
}
+/*
+ * This is called when a task is terminated, and also on exec().
+ * Clear machine-dependent state that is stored on the task.
+ */
void
-act_machine_destroy(thread_act_t thr_act)
+machine_thread_terminate_self(void)
{
+ task_t self_task = current_task();
+ if (self_task) {
+ user_ldt_t user_ldt = self_task->i386_ldt;
+ if (user_ldt != 0) {
+ self_task->i386_ldt = 0;
+ user_ldt_free(user_ldt);
+ }
-#if MACH_ASSERT
- if (watchacts & WA_PCB)
- printf("act_machine_destroy(0x%x)\n", thr_act);
-#endif /* MACH_ASSERT */
-
- pcb_terminate(thr_act);
+ if (self_task->task_debug != NULL) {
+ zfree(ids_zone, self_task->task_debug);
+ self_task->task_debug = NULL;
+ }
+ }
}
void
-act_machine_return(int code)
+act_machine_return(
+ int code
+ )
{
- thread_act_t thr_act = current_act();
-
-#if MACH_ASSERT
- /*
- * We don't go through the locking dance here needed to
- * acquire thr_act->thread safely.
- */
-
- if (watchacts & WA_EXIT)
- printf("act_machine_return(0x%x) cur_act=%x(%d) thr=%x(%d)\n",
- code, thr_act, thr_act->ref_count,
- thr_act->thread, thr_act->thread->ref_count);
-#endif /* MACH_ASSERT */
-
/*
* This code is called with nothing locked.
* It also returns with nothing locked, if it returns.
* activation) is terminated.
*/
assert( code == KERN_TERMINATED );
- assert( thr_act );
- /* This is the only activation attached to the shuttle... */
- /* terminate the entire thread (shuttle plus activation) */
-
- assert(thr_act->thread->top_act == thr_act);
thread_terminate_self();
/*NOTREACHED*/
- panic("act_machine_return: TALKING ZOMBIE! (1)");
+ panic("act_machine_return(%d): TALKING ZOMBIE! (1)", code);
}
* Perform machine-dependent per-thread initializations
*/
void
-thread_machine_init(void)
+machine_thread_init(void)
{
- pcb_module_init();
+ if (cpu_mode_is64bit()) {
+ assert(sizeof(x86_sframe_compat32_t) % 16 == 0);
+ iss_zone = zinit(sizeof(x86_sframe64_t),
+ thread_max * sizeof(x86_sframe64_t),
+ THREAD_CHUNK * sizeof(x86_sframe64_t),
+ "x86_64 saved state");
+
+ ids_zone = zinit(sizeof(x86_debug_state64_t),
+ thread_max * sizeof(x86_debug_state64_t),
+ THREAD_CHUNK * sizeof(x86_debug_state64_t),
+ "x86_64 debug state");
+
+ } else {
+ iss_zone = zinit(sizeof(x86_sframe32_t),
+ thread_max * sizeof(x86_sframe32_t),
+ THREAD_CHUNK * sizeof(x86_sframe32_t),
+ "x86 saved state");
+ ids_zone = zinit(sizeof(x86_debug_state32_t),
+ thread_max * (sizeof(x86_debug_state32_t)),
+ THREAD_CHUNK * (sizeof(x86_debug_state32_t)),
+ "x86 debug state");
+ }
+ fpu_module_init();
}
+
+#if defined(__i386__)
/*
* Some routines for debugging activation code
*/
-static void dump_handlers(thread_act_t);
-void dump_regs(thread_act_t);
+static void dump_handlers(thread_t);
+void dump_regs(thread_t);
+int dump_act(thread_t thr_act);
static void
-dump_handlers(thread_act_t thr_act)
+dump_handlers(thread_t thr_act)
{
- ReturnHandler *rhp = thr_act->handlers;
- int counter = 0;
-
- printf("\t");
- while (rhp) {
- if (rhp == &thr_act->special_handler){
- if (rhp->next)
- printf("[NON-Zero next ptr(%x)]", rhp->next);
- printf("special_handler()->");
- break;
- }
- printf("hdlr_%d(%x)->",counter,rhp->handler);
- rhp = rhp->next;
- if (++counter > 32) {
- printf("Aborting: HUGE handler chain\n");
- break;
+ ReturnHandler *rhp = thr_act->handlers;
+ int counter = 0;
+
+ printf("\t");
+ while (rhp) {
+ if (rhp == &thr_act->special_handler){
+ if (rhp->next)
+ printf("[NON-Zero next ptr(%p)]", rhp->next);
+ printf("special_handler()->");
+ break;
+ }
+ printf("hdlr_%d(%p)->", counter, rhp->handler);
+ rhp = rhp->next;
+ if (++counter > 32) {
+ printf("Aborting: HUGE handler chain\n");
+ break;
+ }
}
- }
- printf("HLDR_NULL\n");
+ printf("HLDR_NULL\n");
}
void
-dump_regs(thread_act_t thr_act)
+dump_regs(thread_t thr_act)
{
- if (thr_act->mact.pcb) {
- register struct i386_saved_state *ssp = USER_REGS(thr_act);
- /* Print out user register state */
+ if (thr_act->machine.pcb == NULL)
+ return;
+
+ if (thread_is_64bit(thr_act)) {
+ x86_saved_state64_t *ssp;
+
+ ssp = USER_REGS64(thr_act);
+
+ panic("dump_regs: 64bit tasks not yet supported");
+
+ } else {
+ x86_saved_state32_t *ssp;
+
+ ssp = USER_REGS32(thr_act);
+
+ /*
+ * Print out user register state
+ */
printf("\tRegs:\tedi=%x esi=%x ebp=%x ebx=%x edx=%x\n",
- ssp->edi, ssp->esi, ssp->ebp, ssp->ebx, ssp->edx);
+ ssp->edi, ssp->esi, ssp->ebp, ssp->ebx, ssp->edx);
+
printf("\t\tecx=%x eax=%x eip=%x efl=%x uesp=%x\n",
- ssp->ecx, ssp->eax, ssp->eip, ssp->efl, ssp->uesp);
+ ssp->ecx, ssp->eax, ssp->eip, ssp->efl, ssp->uesp);
+
printf("\t\tcs=%x ss=%x\n", ssp->cs, ssp->ss);
}
}
int
-dump_act(thread_act_t thr_act)
+dump_act(thread_t thr_act)
{
if (!thr_act)
return(0);
- printf("thr_act(0x%x)(%d): thread=%x(%d) task=%x(%d)\n",
- thr_act, thr_act->ref_count,
- thr_act->thread, thr_act->thread ? thr_act->thread->ref_count:0,
- thr_act->task, thr_act->task ? thr_act->task->ref_count : 0);
+ printf("thread(%p)(%d): task=%p(%d)\n",
+ thr_act, thr_act->ref_count,
+ thr_act->task,
+ thr_act->task ? thr_act->task->ref_count : 0);
- printf("\talerts=%x mask=%x susp=%d user_stop=%d active=%x ast=%x\n",
- thr_act->alerts, thr_act->alert_mask,
- thr_act->suspend_count, thr_act->user_stop_count,
- thr_act->active, thr_act->ast);
- printf("\thi=%x lo=%x\n", thr_act->higher, thr_act->lower);
- printf("\tpcb=%x\n", thr_act->mact.pcb);
+ printf("\tsusp=%d user_stop=%d active=%x ast=%x\n",
+ thr_act->suspend_count, thr_act->user_stop_count,
+ thr_act->active, thr_act->ast);
+ printf("\tpcb=%p\n", thr_act->machine.pcb);
- if (thr_act->thread && thr_act->thread->kernel_stack) {
- vm_offset_t stack = thr_act->thread->kernel_stack;
+ if (thr_act->kernel_stack) {
+ vm_offset_t stack = thr_act->kernel_stack;
- printf("\tk_stk %x eip %x ebx %x esp %x iss %x\n",
- stack, STACK_IKS(stack)->k_eip, STACK_IKS(stack)->k_ebx,
- STACK_IKS(stack)->k_esp, STACK_IEL(stack)->saved_state);
+ printf("\tk_stk %lx eip %x ebx %x esp %x iss %p\n",
+ (long)stack, STACK_IKS(stack)->k_eip, STACK_IKS(stack)->k_ebx,
+ STACK_IKS(stack)->k_esp, STACK_IEL(stack)->saved_state);
}
dump_handlers(thr_act);
dump_regs(thr_act);
return((int)thr_act);
}
-unsigned int
-get_useraddr()
+#endif
+
+user_addr_t
+get_useraddr(void)
{
-
- thread_act_t thr_act = current_act();
+ thread_t thr_act = current_thread();
- if (thr_act->mact.pcb)
- return(thr_act->mact.pcb->iss.eip);
- else
+ if (thr_act->machine.pcb == NULL)
return(0);
-}
+ if (thread_is_64bit(thr_act)) {
+ x86_saved_state64_t *iss64;
+
+ iss64 = USER_REGS64(thr_act);
-void
-thread_swapin_mach_alloc(thread_t thread)
-{
+ return(iss64->isf.rip);
+ } else {
+ x86_saved_state32_t *iss32;
- /* 386 does not have saveareas */
+ iss32 = USER_REGS32(thr_act);
+ return(iss32->eip);
+ }
}
+
/*
* detach and return a kernel stack from a thread
*/
vm_offset_t
-stack_detach(thread_t thread)
+machine_stack_detach(thread_t thread)
{
- vm_offset_t stack;
+ vm_offset_t stack;
- KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_SCHED,MACH_STACK_DETACH),
- thread, thread->priority,
- thread->sched_pri, 0,
- 0);
+ KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_SCHED, MACH_STACK_DETACH),
+ (uintptr_t)thread_tid(thread), thread->priority,
+ thread->sched_pri, 0,
+ 0);
+
+ stack = thread->kernel_stack;
+ thread->kernel_stack = 0;
- stack = thread->kernel_stack;
- thread->kernel_stack = 0;
- return(stack);
+ return (stack);
}
/*
*/
void
-stack_attach(struct thread_shuttle *thread,
- vm_offset_t stack,
- void (*start_pos)(thread_t))
+machine_stack_attach(
+ thread_t thread,
+ vm_offset_t stack)
{
- struct i386_kernel_state *statep;
+ struct x86_kernel_state *statep;
- KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_SCHED,MACH_STACK_ATTACH),
- thread, thread->priority,
- thread->sched_pri, continuation,
- 0);
+ KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_SCHED, MACH_STACK_ATTACH),
+ (uintptr_t)thread_tid(thread), thread->priority,
+ thread->sched_pri, 0, 0);
- assert(stack);
- statep = STACK_IKS(stack);
- thread->kernel_stack = stack;
+ assert(stack);
+ thread->kernel_stack = stack;
- statep->k_eip = (unsigned long) Thread_continue;
- statep->k_ebx = (unsigned long) start_pos;
- statep->k_esp = (unsigned long) STACK_IEL(stack);
- assert(thread->top_act);
- STACK_IEL(stack)->saved_state = &thread->top_act->mact.pcb->iss;
+ statep = STACK_IKS(stack);
+#if defined(__x86_64__)
+ statep->k_rip = (unsigned long) Thread_continue;
+ statep->k_rbx = (unsigned long) thread_continue;
+ statep->k_rsp = (unsigned long) STACK_IEL(stack);
+#else
+ statep->k_eip = (unsigned long) Thread_continue;
+ statep->k_ebx = (unsigned long) thread_continue;
+ statep->k_esp = (unsigned long) STACK_IEL(stack);
+#endif
- return;
+ return;
}
/*
*/
void
-stack_handoff(thread_t old,
+machine_stack_handoff(thread_t old,
thread_t new)
{
+ vm_offset_t stack;
- vm_offset_t stack;
- pmap_t new_pmap;
+ assert(new);
+ assert(old);
- KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_SCHED,MACH_STACK_HANDOFF),
- thread, thread->priority,
- thread->sched_pri, continuation,
- 0);
-
- assert(new->top_act);
- assert(old->top_act);
+#if CONFIG_COUNTERS
+ machine_pmc_cswitch(old, new);
+#endif
- stack = stack_detach(old);
- stack_attach(new, stack, 0);
+ stack = old->kernel_stack;
+ if (stack == old->reserved_stack) {
+ assert(new->reserved_stack);
+ old->reserved_stack = new->reserved_stack;
+ new->reserved_stack = stack;
+ }
+ old->kernel_stack = 0;
+ /*
+ * A full call to machine_stack_attach() is unnecessry
+ * because old stack is already initialized.
+ */
+ new->kernel_stack = stack;
- new_pmap = new->top_act->task->map->pmap;
- if (old->top_act->task->map->pmap != new_pmap)
- PMAP_ACTIVATE_MAP(new->top_act->task->map, cpu_number());
+ fpu_save_context(old);
+
- KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_SCHED,MACH_STACK_HANDOFF) | DBG_FUNC_NONE,
- (int)old, (int)new, old->sched_pri, new->sched_pri, 0);
+ old->machine.specFlags &= ~OnProc;
+ new->machine.specFlags |= OnProc;
- thread_machine_set_current(new);
+ PMAP_SWITCH_CONTEXT(old, new, cpu_number());
+ act_machine_switch_pcb(new);
- active_stacks[cpu_number()] = new->kernel_stack;
+ machine_set_current_thread(new);
- return;
+ return;
}
-struct i386_act_context {
- struct i386_saved_state ss;
- struct i386_float_state fs;
+
+
+
+struct x86_act_context32 {
+ x86_saved_state32_t ss;
+ x86_float_state32_t fs;
+ x86_debug_state32_t ds;
+};
+
+struct x86_act_context64 {
+ x86_saved_state64_t ss;
+ x86_float_state64_t fs;
+ x86_debug_state64_t ds;
};
+
+
void *
act_thread_csave(void)
{
-struct i386_act_context *ic;
-kern_return_t kret;
-int val;
+ kern_return_t kret;
+ mach_msg_type_number_t val;
+ thread_t thr_act = current_thread();
+
+ if (thread_is_64bit(thr_act)) {
+ struct x86_act_context64 *ic64;
+
+ ic64 = (struct x86_act_context64 *)kalloc(sizeof(struct x86_act_context64));
+
+ if (ic64 == (struct x86_act_context64 *)NULL)
+ return((void *)0);
+
+ val = x86_SAVED_STATE64_COUNT;
+ kret = machine_thread_get_state(thr_act, x86_SAVED_STATE64,
+ (thread_state_t) &ic64->ss, &val);
+ if (kret != KERN_SUCCESS) {
+ kfree(ic64, sizeof(struct x86_act_context64));
+ return((void *)0);
+ }
+ val = x86_FLOAT_STATE64_COUNT;
+ kret = machine_thread_get_state(thr_act, x86_FLOAT_STATE64,
+ (thread_state_t) &ic64->fs, &val);
+
+ if (kret != KERN_SUCCESS) {
+ kfree(ic64, sizeof(struct x86_act_context64));
+ return((void *)0);
+ }
+
+ val = x86_DEBUG_STATE64_COUNT;
+ kret = machine_thread_get_state(thr_act,
+ x86_DEBUG_STATE64,
+ (thread_state_t)&ic64->ds,
+ &val);
+ if (kret != KERN_SUCCESS) {
+ kfree(ic64, sizeof(struct x86_act_context64));
+ return((void *)0);
+ }
+ return(ic64);
+
+ } else {
+ struct x86_act_context32 *ic32;
- ic = (struct i386_act_context *)kalloc(sizeof(struct i386_act_context));
+ ic32 = (struct x86_act_context32 *)kalloc(sizeof(struct x86_act_context32));
- if (ic == (struct i386_act_context *)NULL)
- return((void *)0);
+ if (ic32 == (struct x86_act_context32 *)NULL)
+ return((void *)0);
- val = i386_SAVED_STATE_COUNT;
- kret = act_machine_get_state(current_act(), i386_SAVED_STATE, &ic->ss, &val);
+ val = x86_SAVED_STATE32_COUNT;
+ kret = machine_thread_get_state(thr_act, x86_SAVED_STATE32,
+ (thread_state_t) &ic32->ss, &val);
if (kret != KERN_SUCCESS) {
- kfree((vm_offset_t)ic,sizeof(struct i386_act_context));
- return((void *)0);
+ kfree(ic32, sizeof(struct x86_act_context32));
+ return((void *)0);
}
- val = i386_FLOAT_STATE_COUNT;
- kret = act_machine_get_state(current_act(), i386_FLOAT_STATE, &ic->fs, &val);
+ val = x86_FLOAT_STATE32_COUNT;
+ kret = machine_thread_get_state(thr_act, x86_FLOAT_STATE32,
+ (thread_state_t) &ic32->fs, &val);
if (kret != KERN_SUCCESS) {
- kfree((vm_offset_t)ic,sizeof(struct i386_act_context));
- return((void *)0);
+ kfree(ic32, sizeof(struct x86_act_context32));
+ return((void *)0);
}
- return(ic);
+
+ val = x86_DEBUG_STATE32_COUNT;
+ kret = machine_thread_get_state(thr_act,
+ x86_DEBUG_STATE32,
+ (thread_state_t)&ic32->ds,
+ &val);
+ if (kret != KERN_SUCCESS) {
+ kfree(ic32, sizeof(struct x86_act_context32));
+ return((void *)0);
+ }
+ return(ic32);
+ }
}
+
+
void
act_thread_catt(void *ctx)
{
-struct i386_act_context *ic;
-kern_return_t kret;
-int val;
+ thread_t thr_act = current_thread();
+ kern_return_t kret;
- ic = (struct i386_act_context *)ctx;
-
- if (ic == (struct i386_act_context *)NULL)
+ if (ctx == (void *)NULL)
return;
- kret = act_machine_set_state(current_act(), i386_SAVED_STATE, &ic->ss, i386_SAVED_STATE_COUNT);
- if (kret != KERN_SUCCESS)
- goto out;
+ if (thread_is_64bit(thr_act)) {
+ struct x86_act_context64 *ic64;
+
+ ic64 = (struct x86_act_context64 *)ctx;
+
+ kret = machine_thread_set_state(thr_act, x86_SAVED_STATE64,
+ (thread_state_t) &ic64->ss, x86_SAVED_STATE64_COUNT);
+ if (kret == KERN_SUCCESS) {
+ machine_thread_set_state(thr_act, x86_FLOAT_STATE64,
+ (thread_state_t) &ic64->fs, x86_FLOAT_STATE64_COUNT);
+ }
+ kfree(ic64, sizeof(struct x86_act_context64));
+ } else {
+ struct x86_act_context32 *ic32;
+
+ ic32 = (struct x86_act_context32 *)ctx;
+
+ kret = machine_thread_set_state(thr_act, x86_SAVED_STATE32,
+ (thread_state_t) &ic32->ss, x86_SAVED_STATE32_COUNT);
+ if (kret == KERN_SUCCESS) {
+ kret = machine_thread_set_state(thr_act, x86_FLOAT_STATE32,
+ (thread_state_t) &ic32->fs, x86_FLOAT_STATE32_COUNT);
+ if (kret == KERN_SUCCESS && thr_act->machine.pcb->ids)
+ machine_thread_set_state(thr_act,
+ x86_DEBUG_STATE32,
+ (thread_state_t)&ic32->ds,
+ x86_DEBUG_STATE32_COUNT);
+ }
+ kfree(ic32, sizeof(struct x86_act_context32));
+ }
+}
+
+
+void act_thread_cfree(__unused void *ctx)
+{
+ /* XXX - Unused */
+}
+void x86_toggle_sysenter_arg_store(thread_t thread, boolean_t valid);
+void x86_toggle_sysenter_arg_store(thread_t thread, boolean_t valid) {
+ thread->machine.pcb->arg_store_valid = valid;
+}
+
+boolean_t x86_sysenter_arg_store_isvalid(thread_t thread);
+
+boolean_t x86_sysenter_arg_store_isvalid(thread_t thread) {
+ return (thread->machine.pcb->arg_store_valid);
+}
+
+/*
+ * Duplicate one x86_debug_state32_t to another. "all" parameter
+ * chooses whether dr4 and dr5 are copied (they are never meant
+ * to be installed when we do machine_task_set_state() or
+ * machine_thread_set_state()).
+ */
+void
+copy_debug_state32(
+ x86_debug_state32_t *src,
+ x86_debug_state32_t *target,
+ boolean_t all)
+{
+ if (all) {
+ target->dr4 = src->dr4;
+ target->dr5 = src->dr5;
+ }
- kret = act_machine_set_state(current_act(), i386_FLOAT_STATE, &ic->fs, i386_FLOAT_STATE_COUNT);
- if (kret != KERN_SUCCESS)
- goto out;
-out:
- kfree((vm_offset_t)ic,sizeof(struct i386_act_context));
+ target->dr0 = src->dr0;
+ target->dr1 = src->dr1;
+ target->dr2 = src->dr2;
+ target->dr3 = src->dr3;
+ target->dr6 = src->dr6;
+ target->dr7 = src->dr7;
}
-void act_thread_cfree(void *ctx)
+/*
+ * Duplicate one x86_debug_state64_t to another. "all" parameter
+ * chooses whether dr4 and dr5 are copied (they are never meant
+ * to be installed when we do machine_task_set_state() or
+ * machine_thread_set_state()).
+ */
+void
+copy_debug_state64(
+ x86_debug_state64_t *src,
+ x86_debug_state64_t *target,
+ boolean_t all)
{
- kfree((vm_offset_t)ctx,sizeof(struct i386_act_context));
+ if (all) {
+ target->dr4 = src->dr4;
+ target->dr5 = src->dr5;
+ }
+
+ target->dr0 = src->dr0;
+ target->dr1 = src->dr1;
+ target->dr2 = src->dr2;
+ target->dr3 = src->dr3;
+ target->dr6 = src->dr6;
+ target->dr7 = src->dr7;
}
projects / apple / xnu.git / blobdiff