xref: /openbmc/qemu/bsd-user/bsd-proc.c (revision 259ebed4)
1 /*
2  *  BSD process related system call helpers
3  *
4  *  Copyright (c) 2013-14 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 #include "qemu/osdep.h"
20 
21 #include <sys/param.h>
22 #include <sys/types.h>
23 #include <sys/cpuset.h>
24 #include <sys/resource.h>
25 #include <sys/wait.h>
26 
27 #include "qemu.h"
28 #include "qemu-bsd.h"
29 #include "signal-common.h"
30 
31 #include "bsd-proc.h"
32 
33 /*
34  * resource/rusage conversion
35  */
36 int target_to_host_resource(int code)
37 {
38     return code;
39 }
40 
41 rlim_t target_to_host_rlim(abi_llong target_rlim)
42 {
43     return tswap64(target_rlim);
44 }
45 
46 abi_llong host_to_target_rlim(rlim_t rlim)
47 {
48     return tswap64(rlim);
49 }
50 
51 void h2g_rusage(const struct rusage *rusage,
52                 struct target_freebsd_rusage *target_rusage)
53 {
54     __put_user(rusage->ru_utime.tv_sec, &target_rusage->ru_utime.tv_sec);
55     __put_user(rusage->ru_utime.tv_usec, &target_rusage->ru_utime.tv_usec);
56 
57     __put_user(rusage->ru_stime.tv_sec, &target_rusage->ru_stime.tv_sec);
58     __put_user(rusage->ru_stime.tv_usec, &target_rusage->ru_stime.tv_usec);
59 
60     __put_user(rusage->ru_maxrss, &target_rusage->ru_maxrss);
61     __put_user(rusage->ru_idrss, &target_rusage->ru_idrss);
62     __put_user(rusage->ru_idrss, &target_rusage->ru_idrss);
63     __put_user(rusage->ru_isrss, &target_rusage->ru_isrss);
64     __put_user(rusage->ru_minflt, &target_rusage->ru_minflt);
65     __put_user(rusage->ru_majflt, &target_rusage->ru_majflt);
66     __put_user(rusage->ru_nswap, &target_rusage->ru_nswap);
67     __put_user(rusage->ru_inblock, &target_rusage->ru_inblock);
68     __put_user(rusage->ru_oublock, &target_rusage->ru_oublock);
69     __put_user(rusage->ru_msgsnd, &target_rusage->ru_msgsnd);
70     __put_user(rusage->ru_msgrcv, &target_rusage->ru_msgrcv);
71     __put_user(rusage->ru_nsignals, &target_rusage->ru_nsignals);
72     __put_user(rusage->ru_nvcsw, &target_rusage->ru_nvcsw);
73     __put_user(rusage->ru_nivcsw, &target_rusage->ru_nivcsw);
74 }
75 
76 abi_long host_to_target_rusage(abi_ulong target_addr,
77         const struct rusage *rusage)
78 {
79     struct target_freebsd_rusage *target_rusage;
80 
81     if (!lock_user_struct(VERIFY_WRITE, target_rusage, target_addr, 0)) {
82         return -TARGET_EFAULT;
83     }
84     h2g_rusage(rusage, target_rusage);
85     unlock_user_struct(target_rusage, target_addr, 1);
86 
87     return 0;
88 }
89 
90 abi_long host_to_target_wrusage(abi_ulong target_addr,
91                                 const struct __wrusage *wrusage)
92 {
93     struct target_freebsd__wrusage *target_wrusage;
94 
95     if (!lock_user_struct(VERIFY_WRITE, target_wrusage, target_addr, 0)) {
96         return -TARGET_EFAULT;
97     }
98     h2g_rusage(&wrusage->wru_self, &target_wrusage->wru_self);
99     h2g_rusage(&wrusage->wru_children, &target_wrusage->wru_children);
100     unlock_user_struct(target_wrusage, target_addr, 1);
101 
102     return 0;
103 }
104 
105 /*
106  * wait status conversion.
107  *
108  * Map host to target signal numbers for the wait family of syscalls.
109  * Assume all other status bits are the same.
110  */
111 int host_to_target_waitstatus(int status)
112 {
113     if (WIFSIGNALED(status)) {
114         return host_to_target_signal(WTERMSIG(status)) | (status & ~0x7f);
115     }
116     if (WIFSTOPPED(status)) {
117         return (host_to_target_signal(WSTOPSIG(status)) << 8) | (status & 0xff);
118     }
119     return status;
120 }
121 
122 int bsd_get_ncpu(void)
123 {
124     int ncpu = -1;
125     cpuset_t mask;
126 
127     CPU_ZERO(&mask);
128 
129     if (cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_TID, -1, sizeof(mask),
130                            &mask) == 0) {
131         ncpu = CPU_COUNT(&mask);
132     }
133 
134     if (ncpu == -1) {
135         ncpu = sysconf(_SC_NPROCESSORS_ONLN);
136     }
137 
138     if (ncpu == -1) {
139         gemu_log("XXX Missing bsd_get_ncpu() implementation\n");
140         ncpu = 1;
141     }
142 
143     return ncpu;
144 }
145 
146