/*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <kern/sched_prim.h>
#include <kern/misc_protos.h>
#include <kern/assert.h>
+#include <kern/debug.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/seg.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/mp_desc.h>
+#include <i386/misc_protos.h>
+#include <i386/thread.h>
#include <i386/trap.h>
+#include <i386/seg.h>
#include <mach/i386/syscall_sw.h>
#include <sys/syscall.h>
#include <sys/kdebug.h>
-#include <sys/ktrace.h>
#include <sys/errno.h>
#include <../bsd/sys/sysent.h>
-extern struct proc *current_proc(void);
-extern struct proc * kernproc;
-
-kern_return_t
-thread_userstack(
- thread_t,
- int,
- thread_state_t,
- unsigned int,
- mach_vm_offset_t *,
- int *
-);
-
-kern_return_t
-thread_entrypoint(
- thread_t,
- int,
- thread_state_t,
- unsigned int,
- mach_vm_offset_t *
-);
+#ifdef MACH_BSD
+extern void mach_kauth_cred_uthread_update(void);
+extern void throttle_lowpri_io(int);
+#endif
void * find_user_regs(thread_t);
unsigned int get_msr_rbits(void);
-kern_return_t
-thread_compose_cthread_desc(unsigned int addr, pcb_t pcb);
-
-void IOSleep(int);
-
/*
* thread_userstack:
*
*/
kern_return_t
thread_userstack(
- __unused thread_t thread,
- int flavor,
- thread_state_t tstate,
- __unused unsigned int count,
- user_addr_t *user_stack,
- int *customstack
- )
+ __unused thread_t thread,
+ int flavor,
+ thread_state_t tstate,
+ __unused unsigned int count,
+ mach_vm_offset_t *user_stack,
+ int *customstack,
+ __unused boolean_t is64bit
+)
{
- if (customstack)
- *customstack = 0;
-
- switch (flavor) {
- case OLD_i386_THREAD_STATE:
- 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;
- }
+ if (customstack)
+ *customstack = 0;
- 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;
- }
+ switch (flavor) {
+ case x86_THREAD_STATE32:
+ {
+ x86_thread_state32_t *state25;
- default :
- return (KERN_INVALID_ARGUMENT);
- }
-
- return (KERN_SUCCESS);
-}
+ state25 = (x86_thread_state32_t *) tstate;
+ if (state25->esp) {
+ *user_stack = state25->esp;
+ if (customstack)
+ *customstack = 1;
+ } else {
+ *user_stack = VM_USRSTACK32;
+ if (customstack)
+ *customstack = 0;
+ }
+ break;
+ }
-kern_return_t
-thread_entrypoint(
- __unused thread_t thread,
- int flavor,
- thread_state_t tstate,
- __unused unsigned int count,
- mach_vm_offset_t *entry_point
- )
-{
- /*
- * Set a default.
- */
- if (*entry_point == 0)
- *entry_point = VM_MIN_ADDRESS;
-
- switch (flavor) {
- case OLD_i386_THREAD_STATE:
- case x86_THREAD_STATE32:
- {
- x86_thread_state32_t *state25;
+ case x86_THREAD_STATE64:
+ {
+ x86_thread_state64_t *state25;
- state25 = (x86_thread_state32_t *) tstate;
- *entry_point = state25->eip ? state25->eip: VM_MIN_ADDRESS;
- break;
- }
+ state25 = (x86_thread_state64_t *) tstate;
- case x86_THREAD_STATE64:
- {
- x86_thread_state64_t *state25;
+ if (state25->rsp) {
+ *user_stack = state25->rsp;
+ if (customstack)
+ *customstack = 1;
+ } else {
+ *user_stack = VM_USRSTACK64;
+ if (customstack)
+ *customstack = 0;
+ }
+ break;
+ }
- state25 = (x86_thread_state64_t *) tstate;
- *entry_point = state25->rip ? state25->rip: VM_MIN_ADDRESS64;
- break;
- }
- }
- return (KERN_SUCCESS);
-}
+ default:
+ return (KERN_INVALID_ARGUMENT);
+ }
+ return (KERN_SUCCESS);
+}
/*
- * Duplicate parent state in child
- * for U**X fork.
+ * thread_userstackdefault:
+ *
+ * Return the default stack location for the
+ * thread, if otherwise unknown.
*/
kern_return_t
-machine_thread_dup(
- thread_t parent,
- thread_t child
-)
+thread_userstackdefault(
+ mach_vm_offset_t *default_user_stack,
+ boolean_t is64bit)
{
-
- pcb_t parent_pcb;
- pcb_t child_pcb;
+ if (is64bit) {
+ *default_user_stack = VM_USRSTACK64;
+ } else {
+ *default_user_stack = VM_USRSTACK32;
+ }
+ return (KERN_SUCCESS);
+}
- if ((child_pcb = child->machine.pcb) == NULL ||
- (parent_pcb = parent->machine.pcb) == NULL)
- return (KERN_FAILURE);
+kern_return_t
+thread_entrypoint(
+ __unused thread_t thread,
+ int flavor,
+ thread_state_t tstate,
+ __unused unsigned int count,
+ mach_vm_offset_t *entry_point
+)
+{
/*
- * Copy over the i386_saved_state registers
+ * Set a default.
*/
- 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));
+ if (*entry_point == 0)
+ *entry_point = VM_MIN_ADDRESS;
- /*
- * Check to see if parent is using floating point
- * and if so, copy the registers to the child
- */
- fpu_dup_fxstate(parent, child);
+ switch (flavor) {
+ case x86_THREAD_STATE32:
+ {
+ x86_thread_state32_t *state25;
-#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;
+ state25 = (i386_thread_state_t *) tstate;
+ *entry_point = state25->eip ? state25->eip: VM_MIN_ADDRESS;
+ break;
+ }
- /*
- * 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
-
+ 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);
}
void
thread_set_child(thread_t child, int pid)
{
+ pal_register_cache_state(child, DIRTY);
+
+ if (thread_is_64bit(child)) {
+ x86_saved_state64_t *iss64;
- 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;
-
+ x86_saved_state32_t *iss32;
+
iss32 = USER_REGS32(child);
iss32->eax = pid;
}
-void thread_set_parent(thread_t parent, int pid);
-void
-thread_set_parent(thread_t parent, int pid)
-{
-
- 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
*/
-extern struct proc * i386_current_proc(void);
-
extern long fuword(vm_offset_t);
-
-/* following implemented in bsd/dev/i386/unix_signal.c */
-int __pthread_cset(struct sysent *);
-
-void __pthread_creset(struct sysent *);
-
-
+__attribute__((noreturn))
void
machdep_syscall(x86_saved_state_t *state)
{
int args[machdep_call_count];
- int trapno;
+ int trapno;
int nargs;
- machdep_call_t *entry;
+ const machdep_call_t *entry;
x86_saved_state32_t *regs;
assert(is_saved_state32(state));
kprintf("machdep_syscall(0x%08x) code=%d\n", regs, trapno);
#endif
+ DEBUG_KPRINT_SYSCALL_MDEP(
+ "machdep_syscall: trapno=%d\n", trapno);
+
if (trapno < 0 || trapno >= machdep_call_count) {
- regs->eax = (unsigned int)kern_invalid(NULL);
+ regs->eax = (unsigned int)kern_invalid(NULL);
thread_exception_return();
/* NOTREACHED */
nargs = entry->nargs;
if (nargs != 0) {
- if (copyin((user_addr_t) regs->uesp + sizeof (int),
- (char *) args, (nargs * sizeof (int)))) {
- regs->eax = KERN_INVALID_ADDRESS;
+ 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)();
+ case 0:
+ regs->eax = (*entry->routine.args_0)();
break;
- case 1:
+ case 1:
regs->eax = (*entry->routine.args_1)(args[0]);
break;
- case 2:
- regs->eax = (*entry->routine.args_2)(args[0], args[1]);
+ 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]);
+ case 3:
+ if (!entry->bsd_style)
+ regs->eax = (*entry->routine.args_3)(args[0],args[1],args[2]);
else {
- int error;
- int rval;
+ int error;
+ uint32_t rval;
- error = (*entry->routine.args_bsd_3)(&rval, args[0], args[1], args[2]);
+ error = (*entry->routine.args_bsd_3)(&rval, args[0], args[1], args[2]);
if (error) {
- regs->eax = error;
+ regs->eax = error;
regs->efl |= EFL_CF; /* carry bit */
} else {
- regs->eax = rval;
- regs->efl &= ~EFL_CF;
+ regs->eax = rval;
+ regs->efl &= ~EFL_CF;
}
}
break;
- case 4:
+ case 4:
regs->eax = (*entry->routine.args_4)(args[0], args[1], args[2], args[3]);
break;
- default:
- panic("machdep_syscall: too many args");
+ default:
+ panic("machdep_syscall: too many args");
}
- if (current_thread()->funnel_lock)
- (void) thread_funnel_set(current_thread()->funnel_lock, FALSE);
+
+ DEBUG_KPRINT_SYSCALL_MDEP("machdep_syscall: retval=%u\n", regs->eax);
+
+ throttle_lowpri_io(1);
thread_exception_return();
/* NOTREACHED */
}
-
+__attribute__((noreturn))
void
machdep_syscall64(x86_saved_state_t *state)
{
- int trapno;
- machdep_call_t *entry;
+ int trapno;
+ const machdep_call_t *entry;
x86_saved_state64_t *regs;
assert(is_saved_state64(state));
regs = saved_state64(state);
- trapno = regs->rax & SYSCALL_NUMBER_MASK;
+ trapno = (int)(regs->rax & SYSCALL_NUMBER_MASK);
+
+ DEBUG_KPRINT_SYSCALL_MDEP(
+ "machdep_syscall64: trapno=%d\n", trapno);
if (trapno < 0 || trapno >= machdep_call_count) {
- regs->rax = (unsigned int)kern_invalid(NULL);
+ regs->rax = (unsigned int)kern_invalid(NULL);
thread_exception_return();
/* NOTREACHED */
entry = &machdep_call_table64[trapno];
switch (entry->nargs) {
- case 0:
- regs->rax = (*entry->routine.args_0)();
+ case 0:
+ regs->rax = (*entry->routine.args_0)();
break;
- case 1:
+ case 1:
regs->rax = (*entry->routine.args64_1)(regs->rdi);
break;
- default:
- panic("machdep_syscall64: too many args");
+ case 2:
+ regs->rax = (*entry->routine.args64_2)(regs->rdi, regs->rsi);
+ break;
+ default:
+ panic("machdep_syscall64: too many args");
}
- 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;
+ DEBUG_KPRINT_SYSCALL_MDEP("machdep_syscall: retval=%llu\n", regs->rax);
- mp_enable_preemption();
+ throttle_lowpri_io(1);
- 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);
-}
-
-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;
+ thread_exception_return();
+ /* NOTREACHED */
}
#endif /* MACH_BSD */
syscall_arg_t arg9;
};
-
static kern_return_t
-mach_call_arg_munger32(uint32_t sp, int nargs, int call_number, struct mach_call_args *args);
+mach_call_arg_munger32(uint32_t sp, struct mach_call_args *args, const mach_trap_t *trapp);
static kern_return_t
-mach_call_arg_munger32(uint32_t sp, int nargs, int call_number, struct mach_call_args *args)
+mach_call_arg_munger32(uint32_t sp, struct mach_call_args *args, const mach_trap_t *trapp)
{
- 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)));
- }
-
+ if (copyin((user_addr_t)(sp + sizeof(int)), (char *)args, trapp->mach_trap_u32_words * sizeof (int)))
+ return KERN_INVALID_ARGUMENT;
+#if CONFIG_REQUIRES_U32_MUNGING
+ trapp->mach_trap_arg_munge32(args);
+#else
+#error U32 mach traps on x86_64 kernel requires munging
+#endif
return KERN_SUCCESS;
}
-__private_extern__ void
-mach_call_munger(x86_saved_state_t *state);
+__private_extern__ void mach_call_munger(x86_saved_state_t *state);
+extern const char *mach_syscall_name_table[];
-__private_extern__
+__attribute__((noreturn))
void
mach_call_munger(x86_saved_state_t *state)
{
struct mach_call_args args = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
x86_saved_state32_t *regs;
+ struct uthread *ut = get_bsdthread_info(current_thread());
+ uthread_reset_proc_refcount(ut);
+
assert(is_saved_state32(state));
regs = saved_state32(state);
call_number = -(regs->eax);
+
+ DEBUG_KPRINT_SYSCALL_MACH(
+ "mach_call_munger: code=%d(%s)\n",
+ call_number, mach_syscall_name_table[call_number]);
#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);
+ 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);
+ DEBUG_KPRINT_SYSCALL_MACH(
+ "mach_call_munger: kern_invalid 0x%x\n", regs->eax);
+ i386_exception(EXC_SYSCALL, call_number, 1);
/* NOTREACHED */
}
- argc = mach_trap_table[call_number].mach_trap_arg_count;
+ argc = mach_trap_table[call_number].mach_trap_arg_count;
if (argc) {
- retval = mach_call_arg_munger32(regs->uesp, argc, call_number, &args);
-
+ retval = mach_call_arg_munger32(regs->uesp, &args, &mach_trap_table[call_number]);
if (retval != KERN_SUCCESS) {
- regs->eax = retval;
-
+ regs->eax = retval;
+
+ DEBUG_KPRINT_SYSCALL_MACH(
+ "mach_call_munger: retval=0x%x\n", 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);
-
+
+#ifdef MACH_BSD
+ mach_kauth_cred_uthread_update();
+#endif
+
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
+ MACHDBG_CODE(DBG_MACH_EXCP_SC, (call_number)) | DBG_FUNC_START,
+ args.arg1, args.arg2, args.arg3, 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);
+ DEBUG_KPRINT_SYSCALL_MACH("mach_call_munger: retval=0x%x\n", retval);
+
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
+ MACHDBG_CODE(DBG_MACH_EXCP_SC,(call_number)) | DBG_FUNC_END,
+ retval, 0, 0, 0, 0);
+
regs->eax = retval;
-
+
+ throttle_lowpri_io(1);
+
+#if PROC_REF_DEBUG
+ if (__improbable(uthread_get_proc_refcount(ut) != 0)) {
+ panic("system call returned with uu_proc_refcount != 0");
+ }
+#endif
+
thread_exception_return();
/* NOTREACHED */
}
+__private_extern__ void mach_call_munger64(x86_saved_state_t *regs);
-__private_extern__ void
-mach_call_munger64(x86_saved_state_t *state);
-
-
-__private_extern__
+__attribute__((noreturn))
void
mach_call_munger64(x86_saved_state_t *state)
{
int call_number;
int argc;
mach_call_t mach_call;
+ struct mach_call_args args = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
x86_saved_state64_t *regs;
+ struct uthread *ut = get_bsdthread_info(current_thread());
+ uthread_reset_proc_refcount(ut);
+
assert(is_saved_state64(state));
regs = saved_state64(state);
- call_number = regs->rax & SYSCALL_NUMBER_MASK;
+ call_number = (int)(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);
+ DEBUG_KPRINT_SYSCALL_MACH(
+ "mach_call_munger64: code=%d(%s)\n",
+ call_number, mach_syscall_name_table[call_number]);
+
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
+ MACHDBG_CODE(DBG_MACH_EXCP_SC,(call_number)) | DBG_FUNC_START,
+ regs->rdi, regs->rsi, regs->rdx, regs->r10, 0);
if (call_number < 0 || call_number >= mach_trap_count) {
i386_exception(EXC_SYSCALL, regs->rax, 1);
/* NOTREACHED */
}
argc = mach_trap_table[call_number].mach_trap_arg_count;
+ if (argc) {
+ int args_in_regs = MIN(6, argc);
- if (argc > 6) {
+ memcpy(&args.arg1, ®s->rdi, args_in_regs * sizeof(syscall_arg_t));
+
+ if (argc > 6) {
int copyin_count;
- copyin_count = (argc - 6) * sizeof(uint64_t);
+ assert(argc <= 9);
+ copyin_count = (argc - 6) * (int)sizeof(syscall_arg_t);
- if (copyin((user_addr_t)(regs->isf.rsp + sizeof(user_addr_t)), (char *)®s->v_arg6, copyin_count)) {
+ if (copyin((user_addr_t)(regs->isf.rsp + sizeof(user_addr_t)), (char *)&args.arg7, copyin_count)) {
regs->rax = KERN_INVALID_ARGUMENT;
- thread_exception_return();
- /* NOTREACHED */
+ thread_exception_return();
+ /* NOTREACHED */
+ }
}
}
- regs->rax = (uint64_t)mach_call((void *)(®s->rdi));
+
+#ifdef MACH_BSD
+ mach_kauth_cred_uthread_update();
+#endif
+
+ regs->rax = (uint64_t)mach_call((void *)&args);
- KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_SC,(call_number)) | DBG_FUNC_END,
- (int)regs->rax, 0, 0, 0, 0);
+ DEBUG_KPRINT_SYSCALL_MACH( "mach_call_munger64: retval=0x%llx\n", regs->rax);
+
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
+ MACHDBG_CODE(DBG_MACH_EXCP_SC,(call_number)) | DBG_FUNC_END,
+ regs->rax, 0, 0, 0, 0);
+
+ throttle_lowpri_io(1);
+
+#if PROC_REF_DEBUG
+ if (__improbable(uthread_get_proc_refcount(ut) != 0)) {
+ panic("system call returned with uu_proc_refcount != 0");
+ }
+#endif
thread_exception_return();
/* NOTREACHED */
}
-
/*
* thread_setuserstack:
*
thread_t thread,
mach_vm_address_t user_stack)
{
- if (thread_is_64bit(thread)) {
- x86_saved_state64_t *iss64;
+ pal_register_cache_state(thread, DIRTY);
+ if (thread_is_64bit(thread)) {
+ x86_saved_state64_t *iss64;
iss64 = USER_REGS64(thread);
iss64->isf.rsp = (uint64_t)user_stack;
} else {
- x86_saved_state32_t *iss32;
-
+ x86_saved_state32_t *iss32;
+
iss32 = USER_REGS32(thread);
- iss32->uesp = CAST_DOWN(unsigned int, user_stack);
+ iss32->uesp = CAST_DOWN_EXPLICIT(unsigned int, user_stack);
}
}
thread_t thread,
int adjust)
{
- if (thread_is_64bit(thread)) {
- x86_saved_state64_t *iss64;
+ pal_register_cache_state(thread, DIRTY);
+ if (thread_is_64bit(thread)) {
+ x86_saved_state64_t *iss64;
iss64 = USER_REGS64(thread);
return iss64->isf.rsp;
} else {
- x86_saved_state32_t *iss32;
-
+ x86_saved_state32_t *iss32;
+
iss32 = USER_REGS32(thread);
iss32->uesp += adjust;
void
thread_setentrypoint(thread_t thread, mach_vm_address_t entry)
{
- if (thread_is_64bit(thread)) {
- x86_saved_state64_t *iss64;
+ pal_register_cache_state(thread, DIRTY);
+ if (thread_is_64bit(thread)) {
+ x86_saved_state64_t *iss64;
iss64 = USER_REGS64(thread);
iss64->isf.rip = (uint64_t)entry;
} else {
- x86_saved_state32_t *iss32;
-
+ x86_saved_state32_t *iss32;
+
iss32 = USER_REGS32(thread);
- iss32->eip = CAST_DOWN(unsigned int, entry);
+ iss32->eip = CAST_DOWN_EXPLICIT(unsigned int, entry);
}
}
-void
+kern_return_t
thread_setsinglestep(thread_t thread, int on)
{
- if (thread_is_64bit(thread)) {
- x86_saved_state64_t *iss64;
+ pal_register_cache_state(thread, DIRTY);
+ if (thread_is_64bit(thread)) {
+ x86_saved_state64_t *iss64;
iss64 = USER_REGS64(thread);
if (on)
- iss64->isf.rflags |= EFL_TF;
+ iss64->isf.rflags |= EFL_TF;
else
- iss64->isf.rflags &= ~EFL_TF;
+ iss64->isf.rflags &= ~EFL_TF;
} else {
- x86_saved_state32_t *iss32;
-
+ x86_saved_state32_t *iss32;
+
iss32 = USER_REGS32(thread);
- if (on)
- iss32->efl |= EFL_TF;
+ if (on) {
+ iss32->efl |= EFL_TF;
+ /* Ensure IRET */
+ if (iss32->cs == SYSENTER_CS)
+ iss32->cs = SYSENTER_TF_CS;
+ }
else
- iss32->efl &= ~EFL_TF;
+ iss32->efl &= ~EFL_TF;
}
+
+ return (KERN_SUCCESS);
}
+void *
+get_user_regs(thread_t th)
+{
+ pal_register_cache_state(th, DIRTY);
+ return(USER_STATE(th));
+}
-
-/* XXX this should be a struct savearea so that CHUD will work better on x86 */
void *
-find_user_regs(
- thread_t thread)
+find_user_regs(thread_t thread)
+{
+ return get_user_regs(thread);
+}
+
+#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_state_t *find_kern_regs(thread_t);
+
+x86_saved_state_t *
+find_kern_regs(thread_t thread)
{
- return USER_STATE(thread);
+ 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 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