/*
- * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2012 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@
#include <mach/i386/fp_reg.h>
#include <mach/thread_status.h>
-#include <kern/lock.h>
+#include <kern/simple_lock.h>
#include <i386/iopb.h>
#include <i386/seg.h>
#include <i386/tss.h>
#include <i386/eflags.h>
-/*
- * i386_saved_state:
- *
- * Has been exported to servers. See: mach/i386/thread_status.h
- *
- * This structure corresponds to the state of user registers
- * as saved upon kernel entry. It lives in the pcb.
- * It is also pushed onto the stack for exceptions in the kernel.
- * For performance, it is also used directly in syscall exceptions
- * if the server has requested i386_THREAD_STATE flavor for the exception
- * port.
- */
-
-/*
- * Save area for user floating-point state.
- * Allocated only when necessary.
- */
-
-struct x86_fpsave_state {
- boolean_t fp_valid;
- enum {
- FXSAVE32 = 1,
- FXSAVE64 = 2
- } fp_save_layout;
- struct x86_fx_save fx_save_state __attribute__ ((aligned (16)));
-};
+#include <i386/cpu_data.h>
+#include <machine/pal_routines.h>
/*
- * x86_kernel_state32:
+ * 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.
- * kernel only runs in 32 bit mode for now
*/
-struct x86_kernel_state32 {
- int k_ebx; /* kernel context */
- int k_esp;
- int k_ebp;
- int k_edi;
- int k_esi;
- int k_eip;
- /*
- * Kernel stacks are 16-byte aligned with a 4-byte i386_exception_link at
- * the top, followed by an x86_kernel_state32. After both structs have
- * been pushed, we want to be 16-byte aligned. A dummy int gets us there.
- */
- int dummy;
+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;
};
-
-typedef struct pcb {
- void *sf;
- x86_saved_state_t *iss;
- struct x86_fpsave_state *ifps;
-#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; /* the actual user setable ldt data */
-#endif
- decl_simple_lock_data(,lock);
- uint64_t iss_pte0;
- uint64_t iss_pte1;
- void *ids;
-} *pcb_t;
-
-
/*
* Maps state flavor to number of words in the state:
*/
-__private_extern__ unsigned int _MachineStateCount[];
-
-#define USER_STATE(ThrAct) ((ThrAct)->machine.pcb->iss)
-#define USER_REGS32(ThrAct) (saved_state32(USER_STATE(ThrAct)))
-#define USER_REGS64(ThrAct) (saved_state64(USER_STATE(ThrAct)))
+extern unsigned int _MachineStateCount[];
-#define user_pc(ThrAct) (is_saved_state32(USER_STATE(ThrAct)) ? \
- USER_REGS32(ThrAct)->eip : \
- USER_REGS64(ThrAct)->isf.rip )
+/*
+ * 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 */
+ uint64_t iss_pte0;
+ uint64_t iss_pte1;
+#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 machine_thread {
- /*
- * pointer to process control block
- * (actual storage may as well be here, too)
+ 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.
*/
- struct pcb xxx_pcb;
- pcb_t pcb;
-
- uint32_t specFlags;
-#define OnProc 0x1
-
+#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;
+ 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;
+ 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_catt(void *ctx);
extern void act_thread_cfree(void *ctx);
-/*
- * i386_exception_link:
- *
- * This structure lives at the high end of the kernel stack.
- * It points to the current thread`s user registers.
- */
-struct i386_exception_link {
- x86_saved_state_t *saved_state;
-};
-
+#define FIND_PERFCONTROL_STATE(th) (PERFCONTROL_STATE_NULL)
/*
* On the kernel stack is:
* stack: ...
- * struct i386_exception_link
- * struct i386_kernel_state
- * stack+KERNEL_STACK_SIZE
+ * struct x86_kernel_state
+ * stack+kernel_stack_size
*/
#define STACK_IKS(stack) \
- ((struct x86_kernel_state32 *)((stack) + KERNEL_STACK_SIZE) - 1)
-#define STACK_IEL(stack) \
- ((struct i386_exception_link *)STACK_IKS(stack) - 1)
+ ((struct x86_kernel_state *)((stack) + kernel_stack_size) - 1)
/*
- * Return address of the function that called current function, given
- * address of the first parameter of current function.
+ * Return the current stack depth including x86_kernel_state
*/
-#define GET_RETURN_PC(addr) (*((vm_offset_t *)addr - 1))
+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 x86_kernel_state)
+ - stack_ptr);
+}
/*
- * Defining this indicates that MD code will supply an exception()
- * routine, conformant with kern/exception.c (dependency alert!)
- * but which does wonderfully fast, machine-dependent magic.
+ * Return address of the function that called current function, given
+ * address of the first parameter of current function.
*/
-#define MACHINE_FAST_EXCEPTION 1
+#define GET_RETURN_PC(addr) (__builtin_return_address(0))
#endif /* _I386_THREAD_H_ */
projects / apple / xnu.git / blobdiff