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da07e694 WL |
1 | /* |
2 | * FreeBSD sysctl() and sysarch() system call emulation | |
3 | * | |
4 | * Copyright (c) 2013-15 Stacey D. Son | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
48e438a3 | 20 | #include "qemu/osdep.h" |
da07e694 WL |
21 | #include "qemu.h" |
22 | #include "target_arch_sysarch.h" | |
23 | ||
08675078 WL |
24 | #include <sys/sysctl.h> |
25 | ||
26 | /* | |
27 | * Length for the fixed length types. | |
28 | * 0 means variable length for strings and structures | |
29 | * Compare with sys/kern_sysctl.c ctl_size | |
30 | * Note: Not all types appear to be used in-tree. | |
31 | */ | |
32 | static const int G_GNUC_UNUSED guest_ctl_size[CTLTYPE + 1] = { | |
33 | [CTLTYPE_INT] = sizeof(abi_int), | |
34 | [CTLTYPE_UINT] = sizeof(abi_uint), | |
35 | [CTLTYPE_LONG] = sizeof(abi_long), | |
36 | [CTLTYPE_ULONG] = sizeof(abi_ulong), | |
37 | [CTLTYPE_S8] = sizeof(int8_t), | |
38 | [CTLTYPE_S16] = sizeof(int16_t), | |
39 | [CTLTYPE_S32] = sizeof(int32_t), | |
40 | [CTLTYPE_S64] = sizeof(int64_t), | |
41 | [CTLTYPE_U8] = sizeof(uint8_t), | |
42 | [CTLTYPE_U16] = sizeof(uint16_t), | |
43 | [CTLTYPE_U32] = sizeof(uint32_t), | |
44 | [CTLTYPE_U64] = sizeof(uint64_t), | |
45 | }; | |
46 | ||
47 | static const int G_GNUC_UNUSED host_ctl_size[CTLTYPE + 1] = { | |
48 | [CTLTYPE_INT] = sizeof(int), | |
49 | [CTLTYPE_UINT] = sizeof(u_int), | |
50 | [CTLTYPE_LONG] = sizeof(long), | |
51 | [CTLTYPE_ULONG] = sizeof(u_long), | |
52 | [CTLTYPE_S8] = sizeof(int8_t), | |
53 | [CTLTYPE_S16] = sizeof(int16_t), | |
54 | [CTLTYPE_S32] = sizeof(int32_t), | |
55 | [CTLTYPE_S64] = sizeof(int64_t), | |
56 | [CTLTYPE_U8] = sizeof(uint8_t), | |
57 | [CTLTYPE_U16] = sizeof(uint16_t), | |
58 | [CTLTYPE_U32] = sizeof(uint32_t), | |
59 | [CTLTYPE_U64] = sizeof(uint64_t), | |
60 | }; | |
61 | ||
62 | #ifdef TARGET_ABI32 | |
63 | /* | |
64 | * Limit the amount of available memory to be most of the 32-bit address | |
65 | * space. 0x100c000 was arrived at through trial and error as a good | |
66 | * definition of 'most'. | |
67 | */ | |
68 | static const abi_ulong guest_max_mem = UINT32_MAX - 0x100c000 + 1; | |
69 | ||
70 | static abi_ulong G_GNUC_UNUSED cap_memory(uint64_t mem) | |
71 | { | |
72 | return MIN(guest_max_mem, mem); | |
73 | } | |
74 | #endif | |
75 | ||
76 | static abi_ulong G_GNUC_UNUSED scale_to_guest_pages(uint64_t pages) | |
77 | { | |
78 | /* Scale pages from host to guest */ | |
79 | pages = muldiv64(pages, qemu_real_host_page_size(), TARGET_PAGE_SIZE); | |
80 | #ifdef TARGET_ABI32 | |
81 | /* cap pages if need be */ | |
82 | pages = MIN(pages, guest_max_mem / (abi_ulong)TARGET_PAGE_SIZE); | |
83 | #endif | |
84 | return pages; | |
85 | } | |
86 | ||
87 | #ifdef TARGET_ABI32 | |
88 | /* Used only for TARGET_ABI32 */ | |
89 | static abi_long G_GNUC_UNUSED h2g_long_sat(long l) | |
90 | { | |
91 | if (l > INT32_MAX) { | |
92 | l = INT32_MAX; | |
93 | } else if (l < INT32_MIN) { | |
94 | l = INT32_MIN; | |
95 | } | |
96 | return l; | |
97 | } | |
98 | ||
99 | static abi_ulong G_GNUC_UNUSED h2g_ulong_sat(u_long ul) | |
100 | { | |
101 | return MIN(ul, UINT32_MAX); | |
102 | } | |
103 | #endif | |
104 | ||
105 | /* | |
106 | * placeholder until bsd-user downstream upstreams this with its thread support | |
107 | */ | |
108 | #define bsd_get_ncpu() 1 | |
109 | ||
da07e694 WL |
110 | /* sysarch() is architecture dependent. */ |
111 | abi_long do_freebsd_sysarch(void *cpu_env, abi_long arg1, abi_long arg2) | |
112 | { | |
113 | return do_freebsd_arch_sysarch(cpu_env, arg1, arg2); | |
114 | } |