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
|
/*
* QEMU access to the auxiliary vector
*
* Copyright (C) 2013 Red Hat, Inc
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu-common.h"
#include "qemu/osdep.h"
#ifdef CONFIG_GETAUXVAL
/* Don't inline this in qemu/osdep.h, because pulling in <sys/auxv.h> for
the system declaration of getauxval pulls in the system <elf.h>, which
conflicts with qemu's version. */
#include <sys/auxv.h>
unsigned long qemu_getauxval(unsigned long key)
{
return getauxval(key);
}
#elif defined(__linux__)
#include "elf.h"
/* Our elf.h doesn't contain Elf32_auxv_t and Elf64_auxv_t, which is ok because
that just makes it easier to define it properly for the host here. */
typedef struct {
unsigned long a_type;
unsigned long a_val;
} ElfW_auxv_t;
static const ElfW_auxv_t *auxv;
void qemu_init_auxval(char **envp)
{
/* The auxiliary vector is located just beyond the initial environment. */
while (*envp++ != NULL) {
continue;
}
auxv = (const ElfW_auxv_t *)envp;
}
unsigned long qemu_getauxval(unsigned long type)
{
/* If we were able to find the auxiliary vector, use it. */
if (auxv) {
const ElfW_auxv_t *a;
for (a = auxv; a->a_type != 0; a++) {
if (a->a_type == type) {
return a->a_val;
}
}
}
return 0;
}
#endif
|
