bsd-user/bsd-proc.c

   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