80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
/* Copyright (C) 1991,94,1995,1997,2002,2005 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <mach.h>
|
|
#include <thread_state.h>
|
|
#include <string.h>
|
|
#include <mach/machine/vm_param.h>
|
|
#include "sysdep.h" /* Defines stack direction. */
|
|
|
|
#define STACK_SIZE (16 * 1024 * 1024) /* 16MB, arbitrary. */
|
|
|
|
/* Give THREAD a stack and set it to run at PC when resumed.
|
|
If *STACK_SIZE is nonzero, that size of stack is allocated.
|
|
If *STACK_BASE is nonzero, that stack location is used.
|
|
If STACK_BASE is not null it is filled in with the chosen stack base.
|
|
If STACK_SIZE is not null it is filled in with the chosen stack size.
|
|
Regardless, an extra page of red zone is allocated off the end; this
|
|
is not included in *STACK_SIZE. */
|
|
|
|
kern_return_t
|
|
__mach_setup_thread (task_t task, thread_t thread, void *pc,
|
|
vm_address_t *stack_base, vm_size_t *stack_size)
|
|
{
|
|
kern_return_t error;
|
|
struct machine_thread_state ts;
|
|
mach_msg_type_number_t tssize = MACHINE_THREAD_STATE_COUNT;
|
|
vm_address_t stack;
|
|
vm_size_t size;
|
|
int anywhere;
|
|
|
|
size = stack_size ? *stack_size ? : STACK_SIZE : STACK_SIZE;
|
|
stack = stack_base ? *stack_base ? : 0 : 0;
|
|
anywhere = !stack_base || !*stack_base;
|
|
|
|
error = __vm_allocate (task, &stack, size + __vm_page_size, anywhere);
|
|
if (error)
|
|
return error;
|
|
|
|
if (stack_size)
|
|
*stack_size = size;
|
|
|
|
memset (&ts, 0, sizeof (ts));
|
|
MACHINE_THREAD_STATE_SET_PC (&ts, pc);
|
|
#ifdef STACK_GROWTH_DOWN
|
|
if (stack_base)
|
|
*stack_base = stack + __vm_page_size;
|
|
ts.SP = stack + __vm_page_size + size;
|
|
#elif defined (STACK_GROWTH_UP)
|
|
if (stack_base)
|
|
*stack_base = stack;
|
|
ts.SP = stack;
|
|
stack += size;
|
|
#else
|
|
#error stack direction unknown
|
|
#endif
|
|
|
|
/* Create the red zone. */
|
|
if (error = __vm_protect (task, stack, __vm_page_size, 0, VM_PROT_NONE))
|
|
return error;
|
|
|
|
return __thread_set_state (thread, MACHINE_THREAD_STATE_FLAVOR,
|
|
(natural_t *) &ts, tssize);
|
|
}
|
|
|
|
weak_alias (__mach_setup_thread, mach_setup_thread)
|