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/*
* Copyright (c) 2000-2012 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* 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.
*
* 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
*/
/*
* File: machine/thread.h
*
* This file contains the structure definitions for the thread
* state as applied to I386 processors.
*/
#ifndef _I386_THREAD_H_
#define _I386_THREAD_H_
#include <mach/boolean.h>
#include <mach/i386/vm_types.h>
#include <mach/i386/fp_reg.h>
#include <mach/thread_status.h>
#include <kern/simple_lock.h>
#include <i386/fpu.h>
#include <i386/iopb.h>
#include <i386/seg.h>
#include <i386/tss.h>
#include <i386/eflags.h>
#include <i386/cpu_data.h>
#include <i386/proc_reg.h>
#include <machine/pal_routines.h>
/*
* machine_thread_kernel_state, x86_kernel_state:
*
* This structure corresponds to the state of kernel registers
* as saved in a context-switch. It lives at the base of the stack.
*/
struct x86_kernel_state {
uint64_t k_rbx; /* kernel context */
uint64_t k_rsp;
uint64_t k_rbp;
uint64_t k_r12;
uint64_t k_r13;
uint64_t k_r14;
uint64_t k_r15;
uint64_t k_rip;
};
#ifdef MACH_KERNEL_PRIVATE
typedef struct x86_kernel_state machine_thread_kernel_state;
#include <kern/thread_kernel_state.h>
#endif
/*
* Maps state flavor to number of words in the state:
*/
extern unsigned int _MachineStateCount[];
/*
* The machine-dependent thread state - registers and all platform-dependent
* state - is saved in the machine thread structure which is embedded in
* the thread data structure. For historical reasons this is also referred to
* as the PCB.
*/
struct machine_thread {
x86_saved_state_t *iss;
void *ifps;
void *ids;
decl_simple_lock_data(,lock); /* protects ifps and ids */
xstate_t xstate;
#ifdef MACH_BSD
uint64_t cthread_self; /* for use of cthread package */
struct real_descriptor cthread_desc;
unsigned long uldt_selector; /* user ldt selector to set */
struct real_descriptor uldt_desc; /* actual user setable ldt */
#endif
struct pal_pcb pal_pcb;
uint32_t specFlags;
/* N.B.: These "specFlags" are read-modify-written non-atomically within
* the copyio routine. So conceivably any exception that modifies the
* flags in a persistent manner could be clobbered if it occurs within
* a copyio context. For now, the only other flag here is OnProc which
* is not modified except at context switch.
*/
#define OnProc 0x1
#define CopyIOActive 0x2 /* Checked to ensure DTrace actions do not re-enter copyio(). */
uint64_t thread_gpu_ns;
#if NCOPY_WINDOWS > 0
struct {
user_addr_t user_base;
} copy_window[NCOPY_WINDOWS];
int nxt_window;
int copyio_state;
#define WINDOWS_DIRTY 0
#define WINDOWS_CLEAN 1
#define WINDOWS_CLOSED 2
#define WINDOWS_OPENED 3
uint64_t physwindow_pte;
int physwindow_busy;
#endif
};
typedef struct machine_thread *pcb_t;
#define THREAD_TO_PCB(Thr) (&(Thr)->machine)
#define USER_STATE(Thr) ((Thr)->machine.iss)
#define USER_REGS32(Thr) (saved_state32(USER_STATE(Thr)))
#define USER_REGS64(Thr) (saved_state64(USER_STATE(Thr)))
#define user_pc(Thr) (is_saved_state32(USER_STATE(Thr)) ? \
USER_REGS32(Thr)->eip : \
USER_REGS64(Thr)->isf.rip )
extern void *get_user_regs(thread_t);
extern void *act_thread_csave(void);
extern void act_thread_catt(void *ctx);
extern void act_thread_cfree(void *ctx);
#define FIND_PERFCONTROL_STATE(th) (PERFCONTROL_STATE_NULL)
/*
* On the kernel stack is:
* stack: ...
* struct thread_kernel_state
* stack+kernel_stack_size
*/
#define STACK_IKS(stack) \
(&(((struct thread_kernel_state *)((stack) + kernel_stack_size)) - 1)->machine)
/*
* Return the current stack depth including thread_kernel_state
*/
static inline vm_offset_t
current_stack_depth(void)
{
vm_offset_t stack_ptr;
assert(get_preemption_level() > 0 || !ml_get_interrupts_enabled());
#if defined(__x86_64__)
__asm__ volatile("mov %%rsp, %0" : "=m" (stack_ptr));
#else
__asm__ volatile("mov %%esp, %0" : "=m" (stack_ptr));
#endif
return (current_cpu_datap()->cpu_kernel_stack
+ sizeof(struct thread_kernel_state)
- stack_ptr);
}
/*
* Return address of the function that called current function, given
* address of the first parameter of current function.
*/
#define GET_RETURN_PC(addr) (__builtin_return_address(0))
#endif /* _I386_THREAD_H_ */