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/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of GNU Mes.
*
* GNU Mes is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* GNU Mes 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
*/
#include <gnu/syscall.h>
struct mach_msg_int_address
{
mach_msg_header_t header;
mach_msg_type_t type_one; int one;
mach_msg_type_t type_two; vm_address_t two;
};
struct mach_msg_address_int_int
{
mach_msg_header_t header;
mach_msg_type_t type_one; vm_address_t one;
mach_msg_type_t type_two; vm_size_t two;
mach_msg_type_t type_three; boolean_t three;
};
const mach_msg_type_t mach_msg_type_boolean =
{
(unsigned char) MACH_MSG_TYPE_BOOLEAN, // msgt_name
32, // msgt_size
1, // msgt_number
1, // msgt_inline
0, // msgt_longform
0, // msgt_deallocate
0 // msgt_unused
};
kern_return_t
__vm_allocate (mach_port_t task, vm_address_t *address, vm_size_t size, boolean_t anywhere)
{
union message
{
struct mach_msg_address_int_int request;
struct mach_msg_int_address reply;
};
union message message = {0};
message.request.header.msgh_size = sizeof (message.request);
message.request.type_one = mach_msg_type_int32;
message.request.one = *address;
message.request.type_two = mach_msg_type_int32;
message.request.two = size;
message.request.type_three = mach_msg_type_boolean;
message.request.three = anywhere;
kern_return_t result = __syscall_get (task, SYS__vm_allocate,
&message.request.header,
sizeof (message.reply));
if (message.reply.one != KERN_SUCCESS)
return message.reply.one;
if (result == KERN_SUCCESS)
*address = message.reply.two;
return result;
}
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