/*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#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.
- *
- * We define the following as an alias for the "esp" field of the
- * structure, because we actually save cr2 here, not the kernel esp.
- */
-#define cr2 esp
-
-/*
- * Save area for user floating-point state.
- * Allocated only when necessary.
- */
-
-struct i386_fpsave_state {
- boolean_t fp_valid;
- struct i386_fp_save fp_save_state;
- struct i386_fp_regs fp_regs;
- struct i386_fx_save fx_save_state __attribute__ ((aligned (16)));
- int fp_save_flavor;
-};
-
-/*
- * v86_assist_state:
- *
- * This structure provides data to simulate 8086 mode
- * interrupts. It lives in the pcb.
- */
+#include <i386/cpu_data.h>
-struct v86_assist_state {
- vm_offset_t int_table;
- unsigned short int_count;
- unsigned short flags; /* 8086 flag bits */
-};
-#define V86_IF_PENDING 0x8000 /* unused bit */
-
-/*
- * i386_interrupt_state:
- *
- * This structure describes the set of registers that must
- * be pushed on the current ring-0 stack by an interrupt before
- * we can switch to the interrupt stack.
- */
-
-struct i386_interrupt_state {
- int gs;
- int fs;
- int es;
- int ds;
- int edx;
- int ecx;
- int eax;
- int eip;
- int cs;
- int efl;
-};
+#include <machine/pal_routines.h>
/*
- * i386_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 i386_kernel_state {
- int k_ebx; /* kernel context */
- int k_esp;
- int k_ebp;
- int k_edi;
- int k_esi;
- int k_eip;
+#ifdef __i386__
+struct x86_kernel_state {
+ uint32_t k_ebx; /* kernel context */
+ uint32_t k_esp;
+ uint32_t k_ebp;
+ uint32_t k_edi;
+ uint32_t k_esi;
+ uint32_t k_eip;
+ /*
+ * Kernel stacks are 16-byte aligned with x86_kernel_state at the top,
+ * so we need a couple of dummy 32-bit words here.
+ */
+ uint32_t dummy[2];
};
-
-/*
- * i386_machine_state:
- *
- * This structure corresponds to special machine state.
- * It lives in the pcb. It is not saved by default.
- */
-
-struct i386_machine_state {
- iopb_tss_t io_tss;
- struct user_ldt * ldt;
- struct i386_fpsave_state *ifps;
- struct v86_assist_state v86s;
+#else
+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 {
- struct i386_interrupt_state iis[2]; /* interrupt and NMI */
- struct i386_saved_state iss;
- struct i386_machine_state ims;
-#ifdef MACH_BSD
- unsigned long 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)
-} *pcb_t;
/*
* Maps state flavor to number of words in the state:
*/
__private_extern__ unsigned int _MachineStateCount[];
-#define USER_REGS(ThrAct) (&(ThrAct)->machine.pcb->iss)
-
-#define act_machine_state_ptr(ThrAct) (thread_state_t)USER_REGS(ThrAct)
+/*
+ * 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 {
+ void *sf;
+ 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;
+ uint32_t arg_store_valid;
+#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;
+#define OnProc 0x1
+#define CopyIOActive 0x2 /* Checked to ensure DTrace actions do not re-enter copyio(). */
+
+#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 is_user_thread(ThrAct) \
- ((USER_REGS(ThrAct)->efl & EFL_VM) \
- || ((USER_REGS(ThrAct)->cs & 0x03) != 0))
+#define THREAD_TO_PCB(Thr) (&(Thr)->machine)
-#define user_pc(ThrAct) (USER_REGS(ThrAct)->eip)
-#define user_sp(ThrAct) (USER_REGS(ThrAct)->uesp)
+#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)))
-struct machine_thread {
- /*
- * pointer to process control block
- * (actual storage may as well be here, too)
- */
- struct pcb xxx_pcb;
- pcb_t pcb;
+#define user_pc(Thr) (is_saved_state32(USER_STATE(Thr)) ? \
+ USER_REGS32(Thr)->eip : \
+ USER_REGS64(Thr)->isf.rip )
-};
-
-extern struct i386_saved_state *get_user_regs(thread_t);
+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);
-/*
- * 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 {
- struct i386_saved_state *saved_state;
-};
-
/*
* 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 i386_kernel_state *)((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