/*
- * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 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@
*/
#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 <kern/spl.h>
+#include <kern/syscall_sw.h>
#include <ipc/ipc_port.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/tss.h>
#include <i386/user_ldt.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 <i386/trap.h>
+#include <mach/i386/syscall_sw.h>
#include <sys/syscall.h>
-#include <sys/ktrace.h>
-struct proc;
+#include <sys/kdebug.h>
+#include <sys/errno.h>
+#include <../bsd/sys/sysent.h>
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);
-
-void
-act_thread_dup(
- thread_act_t,
- thread_act_t
-);
+void * find_user_regs(thread_t);
unsigned int get_msr_exportmask(void);
unsigned int get_msr_rbits(void);
+kern_return_t
+thread_compose_cthread_desc(unsigned int addr, pcb_t pcb);
+
+void IOSleep(int);
+
+void thread_set_cthreadself(thread_t thread, uint64_t pself, int isLP64);
+
/*
* 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,
+ __unused unsigned int count,
+ user_addr_t *user_stack,
int *customstack
)
{
- struct i386_saved_state *state;
- i386_thread_state_t *state25;
- vm_offset_t uesp;
-
- if (customstack)
- *customstack = 0;
-
- switch (flavor) {
- case i386_THREAD_STATE: /* FIXME */
- state25 = (i386_thread_state_t *) tstate;
- if (state25->esp)
- *user_stack = state25->esp;
- if (customstack && state25->esp)
- *customstack = 1;
- else
- *customstack = 0;
- break;
+ if (customstack)
+ *customstack = 0;
+
+ switch (flavor) {
+ case x86_THREAD_STATE32:
+ {
+ x86_thread_state32_t *state25;
+
+ state25 = (x86_thread_state32_t *) tstate;
+
+ if (state25->esp)
+ *user_stack = state25->esp;
+ else
+ *user_stack = VM_USRSTACK32;
+ if (customstack && state25->esp)
+ *customstack = 1;
+ else
+ *customstack = 0;
+ break;
+ }
+
+ case x86_THREAD_STATE64:
+ {
+ x86_thread_state64_t *state25;
+
+ state25 = (x86_thread_state64_t *) tstate;
+
+ if (state25->rsp)
+ *user_stack = state25->rsp;
+ else
+ *user_stack = VM_USRSTACK64;
+ if (customstack && state25->rsp)
+ *customstack = 1;
+ else
+ *customstack = 0;
+ break;
+ }
+
+ default:
+ return (KERN_INVALID_ARGUMENT);
+ }
+
+ return (KERN_SUCCESS);
+}
- case i386_NEW_THREAD_STATE:
- if (count < i386_NEW_THREAD_STATE_COUNT)
- return (KERN_INVALID_ARGUMENT);
- else {
- state = (struct i386_saved_state *) tstate;
- uesp = state->uesp;
- }
-
- /* If a valid user stack is specified, use it. */
- if (uesp)
- *user_stack = uesp;
- if (customstack && uesp)
- *customstack = 1;
- else
- *customstack = 0;
- break;
- default :
- return (KERN_INVALID_ARGUMENT);
- }
-
- return (KERN_SUCCESS);
-}
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
+ __unused unsigned int count,
+ mach_vm_offset_t *entry_point
)
{
- struct i386_saved_state *state;
- i386_thread_state_t *state25;
-
- /*
- * Set a default.
- */
- if (*entry_point == 0)
- *entry_point = VM_MIN_ADDRESS;
-
- switch (flavor) {
- case i386_THREAD_STATE:
- state25 = (i386_thread_state_t *) tstate;
- *entry_point = state25->eip ? state25->eip: VM_MIN_ADDRESS;
- break;
-
- case i386_NEW_THREAD_STATE:
- if (count < i386_THREAD_STATE_COUNT)
- return (KERN_INVALID_ARGUMENT);
- else {
- state = (struct i386_saved_state *) tstate;
-
- /*
- * If a valid entry point is specified, use it.
- */
- *entry_point = state->eip ? state->eip: VM_MIN_ADDRESS;
- }
- break;
- }
-
- return (KERN_SUCCESS);
-}
-
-struct i386_saved_state *
-get_user_regs(thread_act_t th)
-{
- if (th->mact.pcb)
- return(USER_REGS(th));
- else {
- printf("[get_user_regs: thread does not have pcb]");
- return NULL;
+ /*
+ * Set a default.
+ */
+ if (*entry_point == 0)
+ *entry_point = VM_MIN_ADDRESS;
+
+ switch (flavor) {
+ case x86_THREAD_STATE32:
+ {
+ x86_thread_state32_t *state25;
+
+ state25 = (i386_thread_state_t *) tstate;
+ *entry_point = state25->eip ? state25->eip: VM_MIN_ADDRESS;
+ break;
+ }
+
+ case x86_THREAD_STATE64:
+ {
+ x86_thread_state64_t *state25;
+
+ state25 = (x86_thread_state64_t *) tstate;
+ *entry_point = state25->rip ? state25->rip: VM_MIN_ADDRESS64;
+ break;
+ }
}
+ return (KERN_SUCCESS);
}
+
/*
* Duplicate parent state in child
* for U**X fork.
*/
-void
-act_thread_dup(
- thread_act_t parent,
- thread_act_t child
+kern_return_t
+machine_thread_dup(
+ 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) {
- fp_state_save(parent);
- }
-#endif
-
- if (child->mact.pcb == NULL
- || parent->mact.pcb == NULL) {
- panic("[thread_dup, child (%x) or parent (%x) is NULL!]",
- child->mact.pcb, parent->mact.pcb);
- return;
- }
-
- /* Copy over the i386_saved_state registers */
- child->mact.pcb->iss = parent->mact.pcb->iss;
+
+ pcb_t parent_pcb;
+ pcb_t child_pcb;
+
+ if ((child_pcb = child->machine.pcb) == NULL ||
+ (parent_pcb = parent->machine.pcb) == NULL)
+ return (KERN_FAILURE);
+ /*
+ * Copy over the x86_saved_state registers
+ */
+ if (cpu_mode_is64bit()) {
+ if (thread_is_64bit(parent))
+ bcopy(USER_REGS64(parent), USER_REGS64(child), sizeof(x86_saved_state64_t));
+ else
+ bcopy(USER_REGS32(parent), USER_REGS32(child), sizeof(x86_saved_state_compat32_t));
+ } else
+ bcopy(USER_REGS32(parent), USER_REGS32(child), sizeof(x86_saved_state32_t));
- /* Check to see if parent is using floating point
+ /*
+ * Check to see if parent is using floating point
* and if so, copy the registers to the child
- * FIXME - make sure this works.
*/
+ fpu_dup_fxstate(parent, child);
- if (parent->mact.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
+#ifdef MACH_BSD
+ /*
+ * Copy the parent's cthread id and USER_CTHREAD descriptor, if 32-bit.
+ */
+ child_pcb->cthread_self = parent_pcb->cthread_self;
+ if (!thread_is_64bit(parent))
+ child_pcb->cthread_desc = parent_pcb->cthread_desc;
+
+ /*
+ * 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.
+ if (parent_pcb->uldt_selector!= 0) {
+ child_pcb->uldt_selector = parent_pcb->uldt_selector;
+ child_pcb->uldt_desc = parent_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_act_t child, int pid)
-{
- child->mact.pcb->iss.eax = pid;
- child->mact.pcb->iss.edx = 1;
- child->mact.pcb->iss.efl &= ~EFL_CF;
-}
-void thread_set_parent(thread_act_t parent, int pid);
+void thread_set_child(thread_t child, int pid);
void
-thread_set_parent(thread_act_t parent, int pid)
+thread_set_child(thread_t child, int pid)
{
- parent->mact.pcb->iss.eax = pid;
- parent->mact.pcb->iss.edx = 0;
- parent->mact.pcb->iss.efl &= ~EFL_CF;
+ if (thread_is_64bit(child)) {
+ x86_saved_state64_t *iss64;
+
+ iss64 = USER_REGS64(child);
+
+ iss64->rax = pid;
+ iss64->rdx = 1;
+ iss64->isf.rflags &= ~EFL_CF;
+ } else {
+ x86_saved_state32_t *iss32;
+
+ iss32 = USER_REGS32(child);
+
+ iss32->eax = pid;
+ iss32->edx = 1;
+ iss32->efl &= ~EFL_CF;
+ }
}
+void thread_set_parent(thread_t parent, int pid);
-/*
- * 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)
+thread_set_parent(thread_t parent, int pid)
{
- pmap_movepage((unsigned long)from, (unsigned long)to, (vm_size_t)size);
+ if (thread_is_64bit(parent)) {
+ x86_saved_state64_t *iss64;
+
+ iss64 = USER_REGS64(parent);
+
+ iss64->rax = pid;
+ iss64->rdx = 0;
+ iss64->isf.rflags &= ~EFL_CF;
+ } else {
+ x86_saved_state32_t *iss32;
+
+ iss32 = USER_REGS32(parent);
+
+ iss32->eax = pid;
+ iss32->edx = 0;
+ iss32->efl &= ~EFL_CF;
+ }
}
+
/*
* System Call handling code
*/
-#define ERESTART -1 /* restart syscall */
-#define EJUSTRETURN -2 /* don't modify regs, just return */
+extern long fuword(vm_offset_t);
-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;
+void
+machdep_syscall(x86_saved_state_t *state)
+{
+ int args[machdep_call_count];
+ int trapno;
+ int nargs;
+ machdep_call_t *entry;
+ x86_saved_state32_t *regs;
+
+ assert(is_saved_state32(state));
+ regs = saved_state32(state);
+
+ trapno = regs->eax;
+#if DEBUG_TRACE
+ kprintf("machdep_syscall(0x%08x) code=%d\n", regs, trapno);
+#endif
+
+ if (trapno < 0 || trapno >= machdep_call_count) {
+ regs->eax = (unsigned int)kern_invalid(NULL);
+
+ thread_exception_return();
+ /* NOTREACHED */
+ }
+ entry = &machdep_call_table[trapno];
+ nargs = entry->nargs;
-extern struct sysent sysent[];
+ if (nargs != 0) {
+ if (copyin((user_addr_t) regs->uesp + sizeof (int),
+ (char *) args, (nargs * sizeof (int)))) {
+ regs->eax = KERN_INVALID_ADDRESS;
+
+ thread_exception_return();
+ /* NOTREACHED */
+ }
+ }
+ switch (nargs) {
+ case 0:
+ regs->eax = (*entry->routine.args_0)();
+ break;
+ case 1:
+ regs->eax = (*entry->routine.args_1)(args[0]);
+ break;
+ case 2:
+ regs->eax = (*entry->routine.args_2)(args[0],args[1]);
+ break;
+ case 3:
+ if (!entry->bsd_style)
+ regs->eax = (*entry->routine.args_3)(args[0],args[1],args[2]);
+ else {
+ int error;
+ uint32_t rval;
+
+ error = (*entry->routine.args_bsd_3)(&rval, args[0], args[1], args[2]);
+ if (error) {
+ regs->eax = error;
+ regs->efl |= EFL_CF; /* carry bit */
+ } else {
+ regs->eax = rval;
+ regs->efl &= ~EFL_CF;
+ }
+ }
+ break;
+ case 4:
+ regs->eax = (*entry->routine.args_4)(args[0], args[1], args[2], args[3]);
+ break;
-int set_bsduthreadargs (thread_act_t, struct i386_saved_state *, void *);
+ default:
+ panic("machdep_syscall: too many args");
+ }
+ if (current_thread()->funnel_lock)
+ (void) thread_funnel_set(current_thread()->funnel_lock, FALSE);
-void * get_bsduthreadarg(thread_act_t);
+ thread_exception_return();
+ /* NOTREACHED */
+}
-void unix_syscall(struct i386_saved_state *);
void
-unix_syscall_return(int error)
+machdep_syscall64(x86_saved_state_t *state)
{
- thread_act_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;
-
- thread = current_act();
- rval = (int *)get_bsduthreadrval(thread);
- p = current_proc();
-
- regs = USER_REGS(thread);
-
- /* reconstruct code for tracing before blasting eax */
- code = regs->eax;
- params = (vm_offset_t) ((caddr_t)regs->uesp + sizeof (int));
- callp = (code >= nsysent) ? &sysent[63] : &sysent[code];
- if (callp == sysent) {
- code = fuword(params);
+ int trapno;
+ machdep_call_t *entry;
+ x86_saved_state64_t *regs;
+
+ assert(is_saved_state64(state));
+ regs = saved_state64(state);
+
+ trapno = regs->rax & SYSCALL_NUMBER_MASK;
+
+ if (trapno < 0 || trapno >= machdep_call_count) {
+ regs->rax = (unsigned int)kern_invalid(NULL);
+
+ thread_exception_return();
+ /* NOTREACHED */
}
+ entry = &machdep_call_table64[trapno];
- if (error == ERESTART) {
- regs->eip -= 7;
+ switch (entry->nargs) {
+ case 0:
+ regs->rax = (*entry->routine.args_0)();
+ break;
+ case 1:
+ regs->rax = (*entry->routine.args64_1)(regs->rdi);
+ break;
+ default:
+ panic("machdep_syscall64: too many args");
}
- else if (error != EJUSTRETURN) {
- if (error) {
- regs->eax = error;
- regs->efl |= EFL_CF; /* carry bit */
- } else { /* (not error) */
- regs->eax = rval[0];
- regs->edx = rval[1];
- regs->efl &= ~EFL_CF;
- }
+ if (current_thread()->funnel_lock)
+ (void) thread_funnel_set(current_thread()->funnel_lock, FALSE);
+
+ thread_exception_return();
+ /* NOTREACHED */
+}
+
+
+kern_return_t
+thread_compose_cthread_desc(unsigned int addr, pcb_t pcb)
+{
+ struct real_descriptor desc;
+
+ mp_disable_preemption();
+
+ desc.limit_low = 1;
+ desc.limit_high = 0;
+ desc.base_low = addr & 0xffff;
+ desc.base_med = (addr >> 16) & 0xff;
+ desc.base_high = (addr >> 24) & 0xff;
+ desc.access = ACC_P|ACC_PL_U|ACC_DATA_W;
+ desc.granularity = SZ_32|SZ_G;
+ pcb->cthread_desc = desc;
+ *ldt_desc_p(USER_CTHREAD) = desc;
+
+ mp_enable_preemption();
+
+ return(KERN_SUCCESS);
+}
+
+kern_return_t
+thread_set_cthread_self(uint32_t self)
+{
+ current_thread()->machine.pcb->cthread_self = (uint64_t) self;
+
+ return (KERN_SUCCESS);
+}
+
+kern_return_t
+thread_get_cthread_self(void)
+{
+ return ((kern_return_t)current_thread()->machine.pcb->cthread_self);
+}
+
+kern_return_t
+thread_fast_set_cthread_self(uint32_t self)
+{
+ pcb_t pcb;
+ x86_saved_state32_t *iss;
+
+ pcb = (pcb_t)current_thread()->machine.pcb;
+ thread_compose_cthread_desc(self, pcb);
+ pcb->cthread_self = (uint64_t) self; /* preserve old func too */
+ iss = saved_state32(pcb->iss);
+ iss->gs = USER_CTHREAD;
+
+ return (USER_CTHREAD);
+}
+
+void
+thread_set_cthreadself(thread_t thread, uint64_t pself, int isLP64)
+{
+ if (isLP64 == 0) {
+ pcb_t pcb;
+ x86_saved_state32_t *iss;
+
+ pcb = (pcb_t)thread->machine.pcb;
+ thread_compose_cthread_desc(pself, pcb);
+ pcb->cthread_self = (uint64_t) pself; /* preserve old func too */
+ iss = saved_state32(pcb->iss);
+ iss->gs = USER_CTHREAD;
+ } else {
+ pcb_t pcb;
+ x86_saved_state64_t *iss;
+
+ pcb = thread->machine.pcb;
+
+ /* check for canonical address, set 0 otherwise */
+ if (!IS_USERADDR64_CANONICAL(pself))
+ pself = 0ULL;
+ pcb->cthread_self = pself;
+
+ /* XXX for 64-in-32 */
+ iss = saved_state64(pcb->iss);
+ iss->gs = USER_CTHREAD;
+ thread_compose_cthread_desc((uint32_t) pself, pcb);
}
+}
- ktrsysret(p, code, error, rval[0], callp->sy_funnel);
- KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_EXCP_SC, code) | DBG_FUNC_END,
- error, rval[0], rval[1], 0, 0);
+kern_return_t
+thread_fast_set_cthread_self64(uint64_t self)
+{
+ pcb_t pcb;
+ x86_saved_state64_t *iss;
+
+ pcb = current_thread()->machine.pcb;
+
+ /* check for canonical address, set 0 otherwise */
+ if (!IS_USERADDR64_CANONICAL(self))
+ self = 0ULL;
+ pcb->cthread_self = self;
+ current_cpu_datap()->cpu_uber.cu_user_gs_base = self;
+
+ /* XXX for 64-in-32 */
+ iss = saved_state64(pcb->iss);
+ iss->gs = USER_CTHREAD;
+ thread_compose_cthread_desc((uint32_t) self, pcb);
+
+ 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;
+}
+
+#endif /* MACH_BSD */
+
+
+typedef kern_return_t (*mach_call_t)(void *);
+
+struct mach_call_args {
+ syscall_arg_t arg1;
+ syscall_arg_t arg2;
+ syscall_arg_t arg3;
+ syscall_arg_t arg4;
+ syscall_arg_t arg5;
+ syscall_arg_t arg6;
+ syscall_arg_t arg7;
+ syscall_arg_t arg8;
+ syscall_arg_t arg9;
+};
- if (callp->sy_funnel != NO_FUNNEL) {
- assert(thread_funnel_get() == THR_FUNNEL_NULL);
- (void) thread_funnel_set(current_thread()->funnel_lock, FALSE);
+static kern_return_t
+mach_call_arg_munger32(uint32_t sp, int nargs, int call_number, struct mach_call_args *args);
+
+
+static kern_return_t
+mach_call_arg_munger32(uint32_t sp, int nargs, int call_number, struct mach_call_args *args)
+{
+ unsigned int args32[9];
+
+ if (copyin((user_addr_t)(sp + sizeof(int)), (char *)args32, nargs * sizeof (int)))
+ return KERN_INVALID_ARGUMENT;
+
+ switch (nargs) {
+ case 9: args->arg9 = args32[8];
+ case 8: args->arg8 = args32[7];
+ case 7: args->arg7 = args32[6];
+ case 6: args->arg6 = args32[5];
+ case 5: args->arg5 = args32[4];
+ case 4: args->arg4 = args32[3];
+ case 3: args->arg3 = args32[2];
+ case 2: args->arg2 = args32[1];
+ case 1: args->arg1 = args32[0];
+ }
+ if (call_number == 90) {
+ /* munge_l for mach_wait_until_trap() */
+ args->arg1 = (((uint64_t)(args32[0])) | ((((uint64_t)(args32[1]))<<32)));
+ }
+ if (call_number == 93) {
+ /* munge_wl for mk_timer_arm_trap() */
+ args->arg2 = (((uint64_t)(args32[1])) | ((((uint64_t)(args32[2]))<<32)));
}
- thread_exception_return();
- /* NOTREACHED */
+ return KERN_SUCCESS;
}
+__private_extern__ void mach_call_munger(x86_saved_state_t *state);
+
void
-unix_syscall(struct i386_saved_state *regs)
+mach_call_munger(x86_saved_state_t *state)
{
- thread_act_t thread;
- void *vt;
- unsigned short code;
- struct sysent *callp;
- int nargs, error;
- volatile int *rval;
- int funnel_type;
- vm_offset_t params;
- extern int nsysent;
- struct proc *p;
- struct proc *current_proc();
-
- thread = current_act();
- p = current_proc();
- rval = (int *)get_bsduthreadrval(thread);
-
- //printf("[scall : eax %x]", regs->eax);
- code = regs->eax;
- params = (vm_offset_t) ((caddr_t)regs->uesp + sizeof (int));
- callp = (code >= nsysent) ? &sysent[63] : &sysent[code];
- if (callp == sysent) {
- code = fuword(params);
- params += sizeof (int);
- callp = (code >= nsysent) ? &sysent[63] : &sysent[code];
- }
-
- vt = get_bsduthreadarg(thread);
+ int argc;
+ int call_number;
+ mach_call_t mach_call;
+ kern_return_t retval;
+ struct mach_call_args args = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+ x86_saved_state32_t *regs;
+
+ assert(is_saved_state32(state));
+ regs = saved_state32(state);
+
+ call_number = -(regs->eax);
+#if DEBUG_TRACE
+ kprintf("mach_call_munger(0x%08x) code=%d\n", regs, call_number);
+#endif
+
+ if (call_number < 0 || call_number >= mach_trap_count) {
+ i386_exception(EXC_SYSCALL, call_number, 1);
+ /* NOTREACHED */
+ }
+ mach_call = (mach_call_t)mach_trap_table[call_number].mach_trap_function;
+
+ if (mach_call == (mach_call_t)kern_invalid) {
+ i386_exception(EXC_SYSCALL, call_number, 1);
+ /* NOTREACHED */
+ }
+
+ argc = mach_trap_table[call_number].mach_trap_arg_count;
+ if (argc) {
+ retval = mach_call_arg_munger32(regs->uesp, argc, call_number, &args);
+ if (retval != KERN_SUCCESS) {
+ regs->eax = retval;
+
+ thread_exception_return();
+ /* NOTREACHED */
+ }
+ }
+ KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_SC, (call_number)) | DBG_FUNC_START,
+ (int) args.arg1, (int) args.arg2, (int) args.arg3, (int) args.arg4, 0);
+
+ retval = mach_call(&args);
+
+ KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_SC,(call_number)) | DBG_FUNC_END,
+ retval, 0, 0, 0, 0);
+ regs->eax = retval;
- if ((nargs = (callp->sy_narg * sizeof (int))) &&
- (error = copyin((char *) params, (char *)vt , nargs)) != 0) {
- regs->eax = error;
- regs->efl |= EFL_CF;
thread_exception_return();
/* NOTREACHED */
- }
-
- rval[0] = 0;
- rval[1] = regs->edx;
-
- funnel_type = callp->sy_funnel;
- 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);
+}
- if (callp->sy_narg > 8)
- panic("unix_syscall max arg count exceeded (%d)", callp->sy_narg);
- ktrsyscall(p, code, callp->sy_narg, vt, funnel_type);
+__private_extern__ void mach_call_munger64(x86_saved_state_t *regs);
- {
- int *ip = (int *)vt;
- KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_EXCP_SC, code) | DBG_FUNC_START,
- *ip, *(ip+1), *(ip+2), *(ip+3), 0);
- }
+void
+mach_call_munger64(x86_saved_state_t *state)
+{
+ int call_number;
+ int argc;
+ mach_call_t mach_call;
+ x86_saved_state64_t *regs;
- error = (*(callp->sy_call))(p, (void *) vt, rval);
+ assert(is_saved_state64(state));
+ regs = saved_state64(state);
+
+ call_number = regs->rax & SYSCALL_NUMBER_MASK;
+
+ KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_SC,
+ (call_number)) | DBG_FUNC_START,
+ (int) regs->rdi, (int) regs->rsi,
+ (int) regs->rdx, (int) regs->r10, 0);
-#if 0
- /* May be needed with vfork changes */
- regs = USER_REGS(thread);
-#endif
- if (error == ERESTART) {
- regs->eip -= 7;
+ if (call_number < 0 || call_number >= mach_trap_count) {
+ i386_exception(EXC_SYSCALL, regs->rax, 1);
+ /* NOTREACHED */
}
- else if (error != EJUSTRETURN) {
- if (error) {
- regs->eax = error;
- regs->efl |= EFL_CF; /* carry bit */
- } else { /* (not error) */
- regs->eax = rval[0];
- regs->edx = rval[1];
- regs->efl &= ~EFL_CF;
- }
+ mach_call = (mach_call_t)mach_trap_table[call_number].mach_trap_function;
+
+ if (mach_call == (mach_call_t)kern_invalid) {
+ i386_exception(EXC_SYSCALL, regs->rax, 1);
+ /* NOTREACHED */
}
+ argc = mach_trap_table[call_number].mach_trap_arg_count;
- ktrsysret(p, code, error, rval[0], funnel_type);
+ if (argc > 6) {
+ int copyin_count;
- KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_EXCP_SC, code) | DBG_FUNC_END,
- error, rval[0], rval[1], 0, 0);
+ copyin_count = (argc - 6) * sizeof(uint64_t);
- if(funnel_type != NO_FUNNEL)
- (void) thread_funnel_set(current_thread()->funnel_lock, FALSE);
+ if (copyin((user_addr_t)(regs->isf.rsp + sizeof(user_addr_t)), (char *)®s->v_arg6, copyin_count)) {
+ regs->rax = KERN_INVALID_ARGUMENT;
+
+ thread_exception_return();
+ /* NOTREACHED */
+ }
+ }
+ regs->rax = (uint64_t)mach_call((void *)(®s->rdi));
+
+ KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_SC,
+ (call_number)) | DBG_FUNC_END,
+ (int)regs->rax, 0, 0, 0, 0);
- thread_exception_return();
- /* NOTREACHED */
+ thread_exception_return();
+ /* NOTREACHED */
}
+/*
+ * thread_setuserstack:
+ *
+ * Sets the user stack pointer into the machine
+ * dependent thread state info.
+ */
void
-machdep_syscall( struct i386_saved_state *regs)
+thread_setuserstack(
+ thread_t thread,
+ mach_vm_address_t user_stack)
{
- 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();
+ if (thread_is_64bit(thread)) {
+ x86_saved_state64_t *iss64;
- thread_exception_return();
- /* NOTREACHED */
- }
-
- entry = &machdep_call_table[trapno];
- nargs = entry->nargs;
+ iss64 = USER_REGS64(thread);
+
+ iss64->isf.rsp = (uint64_t)user_stack;
+ } else {
+ x86_saved_state32_t *iss32;
+
+ iss32 = USER_REGS32(thread);
+
+ iss32->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)
+{
+ if (thread_is_64bit(thread)) {
+ x86_saved_state64_t *iss64;
- if (nargs > 0) {
- int args[nargs];
+ iss64 = USER_REGS64(thread);
- if (copyin((char *) regs->uesp + sizeof (int),
- (char *) args,
- nargs * sizeof (int))) {
+ iss64->isf.rsp += adjust;
- regs->eax = KERN_INVALID_ADDRESS;
+ return iss64->isf.rsp;
+ } else {
+ x86_saved_state32_t *iss32;
- thread_exception_return();
- /* NOTREACHED */
+ iss32 = USER_REGS32(thread);
+
+ iss32->uesp += adjust;
+
+ return CAST_USER_ADDR_T(iss32->uesp);
}
+}
- asm volatile("
- 1:
- mov (%2),%%eax;
- pushl %%eax;
- sub $4,%2;
- dec %1;
- jne 1b;
- mov %3,%%eax;
- call *%%eax;
- mov %%eax,%0"
-
- : "=r" (regs->eax)
- : "r" (nargs),
- "r" (&args[nargs - 1]),
- "g" (entry->routine)
- : "ax", "cx", "dx", "sp");
- }
- else
- regs->eax = (unsigned int)(*entry->routine)();
+/*
+ * thread_setentrypoint:
+ *
+ * Sets the user PC into the machine
+ * dependent thread state info.
+ */
+void
+thread_setentrypoint(thread_t thread, mach_vm_address_t entry)
+{
+ if (thread_is_64bit(thread)) {
+ x86_saved_state64_t *iss64;
- if (current_thread()->funnel_lock)
- (void) thread_funnel_set(current_thread()->funnel_lock, FALSE);
+ iss64 = USER_REGS64(thread);
+
+ iss64->isf.rip = (uint64_t)entry;
+ } else {
+ x86_saved_state32_t *iss32;
- thread_exception_return();
- /* NOTREACHED */
+ iss32 = USER_REGS32(thread);
+
+ iss32->eip = CAST_DOWN(unsigned int, entry);
+ }
}
kern_return_t
-thread_set_cthread_self(int self)
+thread_setsinglestep(thread_t thread, int on)
{
- current_act()->mact.pcb->cthread_self = (unsigned int)self;
-
- return (KERN_SUCCESS);
+ if (thread_is_64bit(thread)) {
+ x86_saved_state64_t *iss64;
+
+ iss64 = USER_REGS64(thread);
+
+ if (on)
+ iss64->isf.rflags |= EFL_TF;
+ else
+ iss64->isf.rflags &= ~EFL_TF;
+ } else {
+ x86_saved_state32_t *iss32;
+
+ iss32 = USER_REGS32(thread);
+
+ if (on)
+ iss32->efl |= EFL_TF;
+ else
+ iss32->efl &= ~EFL_TF;
+ }
+
+ return (KERN_SUCCESS);
}
-kern_return_t
-thread_get_cthread_self(void)
+
+
+/* XXX this should be a struct savearea so that CHUD will work better on x86 */
+void *
+find_user_regs(thread_t thread)
{
- return ((kern_return_t)current_act()->mact.pcb->cthread_self);
+ return USER_STATE(thread);
}
-void
-mach25_syscall(struct i386_saved_state *regs)
+void *
+get_user_regs(thread_t th)
{
- printf("*** Atttempt to execute a Mach 2.5 system call at EIP=%x EAX=%x(%d)\n",
- regs->eip, regs->eax, -regs->eax);
- panic("FIXME!");
+ if (th->machine.pcb)
+ return(USER_STATE(th));
+ else {
+ printf("[get_user_regs: thread does not have pcb]");
+ return NULL;
+ }
}
-#endif /* MACH_BSD */
+#if CONFIG_DTRACE
+/*
+ * DTrace would like to have a peek at the kernel interrupt state, if available.
+ * Based on osfmk/chud/i386/chud_thread_i386.c:chudxnu_thread_get_state(), which see.
+ */
+x86_saved_state32_t *find_kern_regs(thread_t);
-#undef current_thread
-thread_t
-current_thread(void)
+x86_saved_state32_t *
+find_kern_regs(thread_t thread)
{
- return(current_thread_fast());
+ if (thread == current_thread() &&
+ NULL != current_cpu_datap()->cpu_int_state &&
+ !(USER_STATE(thread) == current_cpu_datap()->cpu_int_state &&
+ current_cpu_datap()->cpu_interrupt_level == 1)) {
+
+ return saved_state32(current_cpu_datap()->cpu_int_state);
+ } else {
+ return NULL;
+ }
}
+
+vm_offset_t dtrace_get_cpu_int_stack_top(void);
+
+vm_offset_t
+dtrace_get_cpu_int_stack_top(void)
+{
+ return current_cpu_datap()->cpu_int_stack_top;
+}
+#endif
projects / apple / xnu.git / blobdiff