git://sourceware.org / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| c84142e8 UD |
1 | /* Copyright (C) 1991, 1994, 1995, 1997 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. | |
| 28f540f4 | 3 | |
| c84142e8 UD |
4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Library General Public License as | |
| 6 | published by the Free Software Foundation; either version 2 of the | |
| 7 | License, or (at your option) any later version. | |
| 28f540f4 | 8 | |
| c84142e8 UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | Library General Public License for more details. | |
| 28f540f4 | 13 | |
| c84142e8 UD |
14 | You should have received a copy of the GNU Library General Public |
| 15 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
| 16 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 17 | Boston, MA 02111-1307, USA. */ | |
| 28f540f4 RM |
18 | |
| 19 | #include <mach.h> | |
| 20 | #include "thread_state.h" | |
| 21 | #include <string.h> | |
| 22 | #include <mach/machine/vm_param.h> | |
| 23 | #include "sysdep.h" /* Defines stack direction. */ | |
| 24 | ||
| 25 | #define STACK_SIZE (16 * 1024 * 1024) /* 16MB, arbitrary. */ | |
| 26 | ||
| 27 | /* Give THREAD a stack and set it to run at PC when resumed. | |
| 28 | If *STACK_SIZE is nonzero, that size of stack is allocated. | |
| 29 | If *STACK_BASE is nonzero, that stack location is used. | |
| 30 | If STACK_BASE is not null it is filled in with the chosen stack base. | |
| 31 | If STACK_SIZE is not null it is filled in with the chosen stack size. | |
| 32 | Regardless, an extra page of red zone is allocated off the end; this | |
| 33 | is not included in *STACK_SIZE. */ | |
| 34 | ||
| 35 | kern_return_t | |
| 36 | __mach_setup_thread (task_t task, thread_t thread, void *pc, | |
| 37 | vm_address_t *stack_base, vm_size_t *stack_size) | |
| 38 | { | |
| 39 | kern_return_t error; | |
| 40 | struct machine_thread_state ts; | |
| 41 | mach_msg_type_number_t tssize = MACHINE_THREAD_STATE_COUNT; | |
| 42 | vm_address_t stack; | |
| 43 | vm_size_t size; | |
| 0413b54c | 44 | int anywhere; |
| 28f540f4 RM |
45 | |
| 46 | size = stack_size ? *stack_size ? : STACK_SIZE : STACK_SIZE; | |
| 0413b54c UD |
47 | stack = stack_base ? *stack_base ? : 0 : 0; |
| 48 | anywhere = !stack_base || !*stack_base; | |
| 28f540f4 | 49 | |
| 0413b54c UD |
50 | error = __vm_allocate (task, &stack, size + __vm_page_size, anywhere); |
| 51 | if (error) | |
| 28f540f4 RM |
52 | return error; |
| 53 | ||
| 54 | if (stack_size) | |
| 55 | *stack_size = size; | |
| 56 | ||
| 57 | memset (&ts, 0, sizeof (ts)); | |
| 58 | MACHINE_THREAD_STATE_SET_PC (&ts, pc); | |
| 59 | #ifdef STACK_GROWTH_DOWN | |
| 60 | if (stack_base) | |
| 61 | *stack_base = stack + __vm_page_size; | |
| 62 | ts.SP = stack + __vm_page_size + size; | |
| 63 | #elif defined (STACK_GROWTH_UP) | |
| 64 | if (stack_base) | |
| 65 | *stack_base = stack; | |
| 66 | ts.SP = stack; | |
| 67 | stack += size; | |
| 68 | #else | |
| 69 | #error stack direction unknown | |
| 70 | #endif | |
| 71 | ||
| 72 | /* Create the red zone. */ | |
| 73 | if (error = __vm_protect (task, stack, __vm_page_size, 0, VM_PROT_NONE)) | |
| 74 | return error; | |
| c84142e8 | 75 | |
| 28f540f4 RM |
76 | return __thread_set_state (thread, MACHINE_THREAD_STATE_FLAVOR, |
| 77 | (int *) &ts, tssize); | |
| 78 | } | |
| 79 | ||
| 80 | weak_alias (__mach_setup_thread, mach_setup_thread) |