1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <Kernel/API/Syscall.h>
#include <errno.h>
#include <mman.h>
#include <stdio.h>
#include <string.h>
extern "C" {
void* serenity_mmap(void* addr, size_t size, int prot, int flags, int fd, off_t offset, size_t alignment, const char* name)
{
Syscall::SC_mmap_params params { (uintptr_t)addr, size, alignment, prot, flags, fd, offset, { name, name ? strlen(name) : 0 } };
ssize_t rc = syscall(SC_mmap, ¶ms);
if (rc < 0 && -rc < EMAXERRNO) {
errno = -rc;
return MAP_FAILED;
}
return (void*)rc;
}
void* mmap(void* addr, size_t size, int prot, int flags, int fd, off_t offset)
{
return serenity_mmap(addr, size, prot, flags, fd, offset, PAGE_SIZE, nullptr);
}
void* mmap_with_name(void* addr, size_t size, int prot, int flags, int fd, off_t offset, const char* name)
{
return serenity_mmap(addr, size, prot, flags, fd, offset, PAGE_SIZE, name);
}
void* mremap(void* old_address, size_t old_size, size_t new_size, int flags)
{
Syscall::SC_mremap_params params { (uintptr_t)old_address, old_size, new_size, flags };
ssize_t rc = syscall(SC_mremap, ¶ms);
if (rc < 0 && -rc < EMAXERRNO) {
errno = -rc;
return MAP_FAILED;
}
return (void*)rc;
}
int munmap(void* addr, size_t size)
{
int rc = syscall(SC_munmap, addr, size);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
int mprotect(void* addr, size_t size, int prot)
{
int rc = syscall(SC_mprotect, addr, size, prot);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
int set_mmap_name(void* addr, size_t size, const char* name)
{
if (!name) {
errno = EFAULT;
return -1;
}
Syscall::SC_set_mmap_name_params params { addr, size, { name, strlen(name) } };
int rc = syscall(SC_set_mmap_name, ¶ms);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
int madvise(void* address, size_t size, int advice)
{
int rc = syscall(SC_madvise, address, size, advice);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
void* allocate_tls(size_t size)
{
int rc = syscall(SC_allocate_tls, size);
if (rc < 0 && -rc < EMAXERRNO) {
errno = -rc;
return MAP_FAILED;
}
return (void*)rc;
}
}
|
