/*
- * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_LICENSE_OSREFERENCE_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 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.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * 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_LICENSE_OSREFERENCE_HEADER_END@
*/
#ifdef MACH_BSD
-#include <cpus.h>
#include <mach_rt.h>
#include <mach_debug.h>
#include <mach_ldebug.h>
#include <mach/kern_return.h>
+#include <mach/mach_traps.h>
#include <mach/thread_status.h>
#include <mach/vm_param.h>
#include <kern/mach_param.h>
#include <kern/task.h>
#include <kern/thread.h>
-#include <kern/thread_swap.h>
#include <kern/sched_prim.h>
#include <kern/misc_protos.h>
#include <kern/assert.h>
#include <vm/vm_kern.h>
#include <vm/pmap.h>
+#include <i386/cpu_data.h>
+#include <i386/cpu_number.h>
#include <i386/thread.h>
#include <i386/eflags.h>
#include <i386/proc_reg.h>
#include <i386/fpu.h>
#include <i386/iopb_entries.h>
#include <i386/machdep_call.h>
-
+#include <i386/misc_protos.h>
+#include <i386/cpu_data.h>
+#include <i386/cpu_number.h>
+#include <i386/mp_desc.h>
+#include <i386/vmparam.h>
#include <sys/syscall.h>
+#include <sys/kdebug.h>
#include <sys/ktrace.h>
-struct proc;
+#include <../bsd/sys/sysent.h>
+
+extern struct proc *current_proc(void);
kern_return_t
thread_userstack(
int,
thread_state_t,
unsigned int,
- vm_offset_t *,
+ mach_vm_offset_t *,
int *
);
int,
thread_state_t,
unsigned int,
- vm_offset_t *
+ mach_vm_offset_t *
);
-struct i386_saved_state *
-get_user_regs(
- thread_act_t);
-
unsigned int get_msr_exportmask(void);
unsigned int get_msr_nbits(void);
kern_return_t
thread_compose_cthread_desc(unsigned int addr, pcb_t pcb);
+void IOSleep(int);
+
/*
* thread_userstack:
*
*/
kern_return_t
thread_userstack(
- thread_t thread,
+ __unused thread_t thread,
int flavor,
thread_state_t tstate,
unsigned int count,
- vm_offset_t *user_stack,
+ user_addr_t *user_stack,
int *customstack
)
{
state25 = (i386_thread_state_t *) tstate;
if (state25->esp)
*user_stack = state25->esp;
+ else
+ *user_stack = USRSTACK;
if (customstack && state25->esp)
*customstack = 1;
else
/* If a valid user stack is specified, use it. */
if (uesp)
*user_stack = uesp;
+ else
+ *user_stack = USRSTACK;
if (customstack && uesp)
*customstack = 1;
else
kern_return_t
thread_entrypoint(
- thread_t thread,
+ __unused thread_t thread,
int flavor,
thread_state_t tstate,
unsigned int count,
- vm_offset_t *entry_point
+ mach_vm_offset_t *entry_point
)
{
struct i386_saved_state *state;
}
struct i386_saved_state *
-get_user_regs(thread_act_t th)
+get_user_regs(thread_t th)
{
- if (th->mact.pcb)
+ if (th->machine.pcb)
return(USER_REGS(th));
else {
printf("[get_user_regs: thread does not have pcb]");
*/
kern_return_t
machine_thread_dup(
- thread_act_t parent,
- thread_act_t child
+ thread_t parent,
+ thread_t child
)
{
- struct i386_saved_state *parent_state, *child_state;
- struct i386_machine_state *ims;
struct i386_float_state floatregs;
#ifdef XXX
/* Save the FPU state */
- if ((pcb_t)(per_proc_info[cpu_number()].fpu_pcb) == parent->mact.pcb) {
+ if ((pcb_t)(per_proc_info[cpu_number()].fpu_pcb) == parent->machine.pcb) {
fp_state_save(parent);
}
#endif
- if (child->mact.pcb == NULL || parent->mact.pcb == NULL)
+ if (child->machine.pcb == NULL || parent->machine.pcb == NULL)
return (KERN_FAILURE);
/* Copy over the i386_saved_state registers */
- child->mact.pcb->iss = parent->mact.pcb->iss;
+ child->machine.pcb->iss = parent->machine.pcb->iss;
/* Check to see if parent is using floating point
* and if so, copy the registers to the child
* FIXME - make sure this works.
*/
- if (parent->mact.pcb->ims.ifps) {
+ if (parent->machine.pcb->ims.ifps) {
if (fpu_get_state(parent, &floatregs) == KERN_SUCCESS)
fpu_set_state(child, &floatregs);
}
/* FIXME - should a user specified LDT, TSS and V86 info
* be duplicated as well?? - probably not.
*/
-
+ // duplicate any use LDT entry that was set I think this is appropriate.
+#ifdef MACH_BSD
+ if (parent->machine.pcb->uldt_selector!= 0) {
+ child->machine.pcb->uldt_selector = parent->machine.pcb->uldt_selector;
+ child->machine.pcb->uldt_desc = parent->machine.pcb->uldt_desc;
+ }
+#endif
+
+
return (KERN_SUCCESS);
}
* FIXME - thread_set_child
*/
-void thread_set_child(thread_act_t child, int pid);
+void thread_set_child(thread_t child, int pid);
void
-thread_set_child(thread_act_t child, int pid)
+thread_set_child(thread_t child, int pid)
{
- child->mact.pcb->iss.eax = pid;
- child->mact.pcb->iss.edx = 1;
- child->mact.pcb->iss.efl &= ~EFL_CF;
+ child->machine.pcb->iss.eax = pid;
+ child->machine.pcb->iss.edx = 1;
+ child->machine.pcb->iss.efl &= ~EFL_CF;
}
-void thread_set_parent(thread_act_t parent, int pid);
+void thread_set_parent(thread_t parent, int pid);
void
-thread_set_parent(thread_act_t parent, int pid)
+thread_set_parent(thread_t parent, int pid)
{
- parent->mact.pcb->iss.eax = pid;
- parent->mact.pcb->iss.edx = 0;
- parent->mact.pcb->iss.efl &= ~EFL_CF;
+ parent->machine.pcb->iss.eax = pid;
+ parent->machine.pcb->iss.edx = 0;
+ parent->machine.pcb->iss.efl &= ~EFL_CF;
}
-/*
- * Move pages from one kernel virtual address to another.
- * Both addresses are assumed to reside in the Sysmap,
- * and size must be a multiple of the page size.
- */
-void
-pagemove(
- register caddr_t from,
- register caddr_t to,
- int size)
-{
- pmap_movepage((unsigned long)from, (unsigned long)to, (vm_size_t)size);
-}
-
/*
* System Call handling code
*/
#define ERESTART -1 /* restart syscall */
#define EJUSTRETURN -2 /* don't modify regs, just return */
-struct sysent { /* system call table */
- unsigned short sy_narg; /* number of args */
- char sy_parallel; /* can execute in parallel */
- char sy_funnel; /* funnel type */
- unsigned long (*sy_call)(void *, void *, int *); /* implementing function */
-};
#define NO_FUNNEL 0
#define KERNEL_FUNNEL 1
-#define NETWORK_FUNNEL 2
extern funnel_t * kernel_flock;
-extern funnel_t * network_flock;
-extern struct sysent sysent[];
+extern int set_bsduthreadargs (thread_t, struct i386_saved_state *, void *);
+extern void * get_bsduthreadarg(thread_t);
+extern int * get_bsduthreadrval(thread_t th);
+extern int * get_bsduthreadlowpridelay(thread_t th);
+
+extern long fuword(vm_offset_t);
+
+extern void unix_syscall(struct i386_saved_state *);
+extern void unix_syscall_return(int);
-int set_bsduthreadargs (thread_act_t, struct i386_saved_state *, void *);
+/* following implemented in bsd/dev/i386/unix_signal.c */
+int __pthread_cset(struct sysent *);
-void * get_bsduthreadarg(thread_act_t);
+void __pthread_creset(struct sysent *);
-void unix_syscall(struct i386_saved_state *);
void
unix_syscall_return(int error)
{
- thread_act_t thread;
+ thread_t thread;
volatile int *rval;
struct i386_saved_state *regs;
struct proc *p;
- struct proc *current_proc();
unsigned short code;
vm_offset_t params;
struct sysent *callp;
- extern int nsysent;
+ volatile int *lowpri_delay;
- thread = current_act();
- rval = (int *)get_bsduthreadrval(thread);
+ thread = current_thread();
+ rval = get_bsduthreadrval(thread);
+ lowpri_delay = get_bsduthreadlowpridelay(thread);
p = current_proc();
regs = USER_REGS(thread);
}
}
- ktrsysret(p, code, error, rval[0], callp->sy_funnel);
+ ktrsysret(p, code, error, rval[0], (callp->sy_funnel & FUNNEL_MASK));
- KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_EXCP_SC, code) | DBG_FUNC_END,
- error, rval[0], rval[1], 0, 0);
+ __pthread_creset(callp);
- if (callp->sy_funnel != NO_FUNNEL)
+ if ((callp->sy_funnel & FUNNEL_MASK) != NO_FUNNEL)
(void) thread_funnel_set(current_thread()->funnel_lock, FALSE);
+ if (*lowpri_delay) {
+ /*
+ * task is marked as a low priority I/O type
+ * and the I/O we issued while in this system call
+ * collided with normal I/O operations... we'll
+ * delay in order to mitigate the impact of this
+ * task on the normal operation of the system
+ */
+ IOSleep(*lowpri_delay);
+ *lowpri_delay = 0;
+ }
+ KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_EXCP_SC, code) | DBG_FUNC_END,
+ error, rval[0], rval[1], 0, 0);
+
thread_exception_return();
/* NOTREACHED */
}
void
unix_syscall(struct i386_saved_state *regs)
{
- thread_act_t thread;
+ thread_t thread;
void *vt;
unsigned short code;
struct sysent *callp;
- int nargs, error;
- volatile int *rval;
+ int nargs;
+ int error;
+ int *rval;
int funnel_type;
vm_offset_t params;
- extern int nsysent;
struct proc *p;
- struct proc *current_proc();
+ volatile int *lowpri_delay;
- thread = current_act();
+ thread = current_thread();
p = current_proc();
- rval = (int *)get_bsduthreadrval(thread);
+ rval = get_bsduthreadrval(thread);
+ lowpri_delay = get_bsduthreadlowpridelay(thread);
+
+ thread->task->syscalls_unix++; /* MP-safety ignored */
//printf("[scall : eax %x]", regs->eax);
code = regs->eax;
vt = get_bsduthreadarg(thread);
if ((nargs = (callp->sy_narg * sizeof (int))) &&
- (error = copyin((char *) params, (char *)vt , nargs)) != 0) {
+ (error = copyin((user_addr_t) params, (char *) vt, nargs)) != 0) {
regs->eax = error;
regs->efl |= EFL_CF;
thread_exception_return();
rval[0] = 0;
rval[1] = regs->edx;
- funnel_type = callp->sy_funnel;
+ if ((error = __pthread_cset(callp))) {
+ /* cancelled system call; let it returned with EINTR for handling */
+ regs->eax = error;
+ regs->efl |= EFL_CF;
+ thread_exception_return();
+ /* NOTREACHED */
+ }
+
+ funnel_type = (callp->sy_funnel & FUNNEL_MASK);
if(funnel_type == KERNEL_FUNNEL)
(void) thread_funnel_set(kernel_flock, TRUE);
- else if (funnel_type == NETWORK_FUNNEL)
- (void) thread_funnel_set(network_flock, TRUE);
- set_bsduthreadargs(thread, regs, NULL);
+ (void) set_bsduthreadargs(thread, regs, NULL);
if (callp->sy_narg > 8)
panic("unix_syscall max arg count exceeded (%d)", callp->sy_narg);
*ip, *(ip+1), *(ip+2), *(ip+3), 0);
}
- error = (*(callp->sy_call))(p, (void *) vt, (int *) &rval[0]);
+ error = (*(callp->sy_call))((void *) p, (void *) vt, &rval[0]);
#if 0
/* May be needed with vfork changes */
ktrsysret(p, code, error, rval[0], funnel_type);
- KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_EXCP_SC, code) | DBG_FUNC_END,
- error, rval[0], rval[1], 0, 0);
+ __pthread_creset(callp);
if(funnel_type != NO_FUNNEL)
(void) thread_funnel_set(current_thread()->funnel_lock, FALSE);
+ if (*lowpri_delay) {
+ /*
+ * task is marked as a low priority I/O type
+ * and the I/O we issued while in this system call
+ * collided with normal I/O operations... we'll
+ * delay in order to mitigate the impact of this
+ * task on the normal operation of the system
+ */
+ IOSleep(*lowpri_delay);
+ *lowpri_delay = 0;
+ }
+ KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_EXCP_SC, code) | DBG_FUNC_END,
+ error, rval[0], rval[1], 0, 0);
+
thread_exception_return();
/* NOTREACHED */
}
{
int trapno, nargs;
machdep_call_t *entry;
- thread_t thread;
- struct proc *p;
- struct proc *current_proc();
trapno = regs->eax;
if (trapno < 0 || trapno >= machdep_call_count) {
- regs->eax = (unsigned int)kern_invalid();
+ regs->eax = (unsigned int)kern_invalid(NULL);
thread_exception_return();
/* NOTREACHED */
if (nargs > 0) {
int args[nargs];
- if (copyin((char *) regs->uesp + sizeof (int),
+ if (copyin((user_addr_t) regs->uesp + sizeof (int),
(char *) args,
nargs * sizeof (int))) {
switch (nargs) {
case 1:
- regs->eax = (*entry->routine)(args[0]);
+ regs->eax = (*entry->routine.args_1)(args[0]);
break;
case 2:
- regs->eax = (*entry->routine)(args[0],args[1]);
+ regs->eax = (*entry->routine.args_2)(args[0],args[1]);
break;
case 3:
- regs->eax = (*entry->routine)(args[0],args[1],args[2]);
+ regs->eax = (*entry->routine.args_3)(args[0],args[1],args[2]);
break;
case 4:
- regs->eax = (*entry->routine)(args[0],args[1],args[2],args[3]);
+ regs->eax = (*entry->routine.args_4)(args[0],args[1],args[2],args[3]);
break;
default:
panic("machdep_syscall(): too many args");
}
}
else
- regs->eax = (*entry->routine)();
+ regs->eax = (*entry->routine.args_0)();
if (current_thread()->funnel_lock)
(void) thread_funnel_set(current_thread()->funnel_lock, FALSE);
thread_compose_cthread_desc(unsigned int addr, pcb_t pcb)
{
struct real_descriptor desc;
- extern struct fake_descriptor *mp_ldt[];
- struct real_descriptor *ldtp;
- int mycpu = cpu_number();
- ldtp = (struct real_descriptor *)mp_ldt[mycpu];
+ mp_disable_preemption();
+
desc.limit_low = 1;
desc.limit_high = 0;
desc.base_low = addr & 0xffff;
desc.access = ACC_P|ACC_PL_U|ACC_DATA_W;
desc.granularity = SZ_32|SZ_G;
pcb->cthread_desc = desc;
- ldtp[sel_idx(USER_CTHREAD)] = desc;
+ *ldt_desc_p(USER_CTHREAD) = desc;
+
+ mp_enable_preemption();
+
return(KERN_SUCCESS);
}
kern_return_t
-thread_set_cthread_self(int self)
+thread_set_cthread_self(uint32_t self)
{
- current_act()->mact.pcb->cthread_self = (unsigned int)self;
+ current_thread()->machine.pcb->cthread_self = self;
return (KERN_SUCCESS);
}
kern_return_t
thread_get_cthread_self(void)
{
- return ((kern_return_t)current_act()->mact.pcb->cthread_self);
+ return ((kern_return_t)current_thread()->machine.pcb->cthread_self);
}
kern_return_t
-thread_fast_set_cthread_self(int self)
+thread_fast_set_cthread_self(uint32_t self)
{
pcb_t pcb;
- pcb = (pcb_t)current_act()->mact.pcb;
- thread_compose_cthread_desc((unsigned int)self, pcb);
- pcb->cthread_self = (unsigned int)self; /* preserve old func too */
+ pcb = (pcb_t)current_thread()->machine.pcb;
+ thread_compose_cthread_desc(self, pcb);
+ pcb->cthread_self = self; /* preserve old func too */
return (USER_CTHREAD);
}
+/*
+ * thread_set_user_ldt routine is the interface for the user level
+ * settable ldt entry feature. allowing a user to create arbitrary
+ * ldt entries seems to be too large of a security hole, so instead
+ * this mechanism is in place to allow user level processes to have
+ * an ldt entry that can be used in conjunction with the FS register.
+ *
+ * Swapping occurs inside the pcb.c file along with initialization
+ * when a thread is created. The basic functioning theory is that the
+ * pcb->uldt_selector variable will contain either 0 meaning the
+ * process has not set up any entry, or the selector to be used in
+ * the FS register. pcb->uldt_desc contains the actual descriptor the
+ * user has set up stored in machine usable ldt format.
+ *
+ * Currently one entry is shared by all threads (USER_SETTABLE), but
+ * this could be changed in the future by changing how this routine
+ * allocates the selector. There seems to be no real reason at this
+ * time to have this added feature, but in the future it might be
+ * needed.
+ *
+ * address is the linear address of the start of the data area size
+ * is the size in bytes of the area flags should always be set to 0
+ * for now. in the future it could be used to set R/W permisions or
+ * other functions. Currently the segment is created as a data segment
+ * up to 1 megabyte in size with full read/write permisions only.
+ *
+ * this call returns the segment selector or -1 if any error occurs
+ */
+kern_return_t
+thread_set_user_ldt(uint32_t address, uint32_t size, uint32_t flags)
+{
+ pcb_t pcb;
+ struct fake_descriptor temp;
+ int mycpu;
+
+ if (flags != 0)
+ return -1; // flags not supported
+ if (size > 0xFFFFF)
+ return -1; // size too big, 1 meg is the limit
+
+ mp_disable_preemption();
+ mycpu = cpu_number();
+
+ // create a "fake" descriptor so we can use fix_desc()
+ // to build a real one...
+ // 32 bit default operation size
+ // standard read/write perms for a data segment
+ pcb = (pcb_t)current_thread()->machine.pcb;
+ temp.offset = address;
+ temp.lim_or_seg = size;
+ temp.size_or_wdct = SZ_32;
+ temp.access = ACC_P|ACC_PL_U|ACC_DATA_W;
+
+ // turn this into a real descriptor
+ fix_desc(&temp,1);
+
+ // set up our data in the pcb
+ pcb->uldt_desc = *(struct real_descriptor*)&temp;
+ pcb->uldt_selector = USER_SETTABLE; // set the selector value
+
+ // now set it up in the current table...
+ *ldt_desc_p(USER_SETTABLE) = *(struct real_descriptor*)&temp;
+
+ mp_enable_preemption();
+
+ return USER_SETTABLE;
+}
void
mach25_syscall(struct i386_saved_state *regs)
{
int i, argc;
unsigned int kdarg[3];
+ current_thread()->task->syscalls_mach++; /* MP-safety ignored */
+
/* Always prepare to trace mach system calls */
kdarg[0]=0;
return retval; /* pass this back thru */
}
+typedef kern_return_t (*mach_call_t)(void *);
+
+extern __attribute__((regparm(1))) kern_return_t
+mach_call_munger(unsigned int call_number,
+ unsigned int arg1,
+ unsigned int arg2,
+ unsigned int arg3,
+ unsigned int arg4,
+ unsigned int arg5,
+ unsigned int arg6,
+ unsigned int arg7,
+ unsigned int arg8,
+ unsigned int arg9
+);
+
+struct mach_call_args {
+ unsigned int arg1;
+ unsigned int arg2;
+ unsigned int arg3;
+ unsigned int arg4;
+ unsigned int arg5;
+ unsigned int arg6;
+ unsigned int arg7;
+ unsigned int arg8;
+ unsigned int arg9;
+};
+__private_extern__
+__attribute__((regparm(1))) kern_return_t
+mach_call_munger(unsigned int call_number,
+ unsigned int arg1,
+ unsigned int arg2,
+ unsigned int arg3,
+ unsigned int arg4,
+ unsigned int arg5,
+ unsigned int arg6,
+ unsigned int arg7,
+ unsigned int arg8,
+ unsigned int arg9
+)
+{
+ int argc;
+ mach_call_t mach_call;
+ kern_return_t retval;
+ struct mach_call_args args = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+
+ current_thread()->task->syscalls_mach++; /* MP-safety ignored */
+ call_number >>= 4;
+
+ argc = mach_trap_table[call_number].mach_trap_arg_count;
+ switch (argc) {
+ case 9: args.arg9 = arg9;
+ case 8: args.arg8 = arg8;
+ case 7: args.arg7 = arg7;
+ case 6: args.arg6 = arg6;
+ case 5: args.arg5 = arg5;
+ case 4: args.arg4 = arg4;
+ case 3: args.arg3 = arg3;
+ case 2: args.arg2 = arg2;
+ case 1: args.arg1 = arg1;
+ }
+
+ KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_SC, (call_number)) | DBG_FUNC_START,
+ args.arg1, args.arg2, args.arg3, 0, 0);
+
+ mach_call = (mach_call_t)mach_trap_table[call_number].mach_trap_function;
+ retval = mach_call(&args);
+
+ KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_SC,(call_number)) | DBG_FUNC_END,
+ retval, 0, 0, 0, 0);
+
+ return retval;
+}
+
+/*
+ * thread_setuserstack:
+ *
+ * Sets the user stack pointer into the machine
+ * dependent thread state info.
+ */
+void
+thread_setuserstack(
+ thread_t thread,
+ mach_vm_address_t user_stack)
+{
+ struct i386_saved_state *ss = get_user_regs(thread);
+
+ ss->uesp = CAST_DOWN(unsigned int,user_stack);
+}
+
+/*
+ * thread_adjuserstack:
+ *
+ * Returns the adjusted user stack pointer from the machine
+ * dependent thread state info. Used for small (<2G) deltas.
+ */
+uint64_t
+thread_adjuserstack(
+ thread_t thread,
+ int adjust)
+{
+ struct i386_saved_state *ss = get_user_regs(thread);
+
+ ss->uesp += adjust;
+ return CAST_USER_ADDR_T(ss->uesp);
+}
+
+/*
+ * thread_setentrypoint:
+ *
+ * Sets the user PC into the machine
+ * dependent thread state info.
+ */
+void
+thread_setentrypoint(
+ thread_t thread,
+ mach_vm_address_t entry)
+{
+ struct i386_saved_state *ss = get_user_regs(thread);
+
+ ss->eip = CAST_DOWN(unsigned int,entry);
+}
+
projects / apple / xnu.git / blobdiff