nsz Git - musl/blob - src/linux/x32/sysinfo.c

   1 #include <sys/sysinfo.h>
   2 #include "syscall.h"
   3
   4 #define klong long long
   5 #define kulong unsigned long long
   6
   7 struct kernel_sysinfo {
   8         klong uptime;
   9         kulong loads[3];
  10         kulong totalram;
  11         kulong freeram;
  12         kulong sharedram;
  13         kulong bufferram;
  14         kulong totalswap;
  15         kulong freeswap;
  16         short procs;
  17         short pad;
  18         kulong totalhigh;
  19         kulong freehigh;
  20         unsigned mem_unit;
  21 };
  22
  23 int __lsysinfo(struct sysinfo *info)
  24 {
  25         struct kernel_sysinfo tmp;
  26         int ret = syscall(SYS_sysinfo, &tmp);
  27         if(ret == -1) return ret;
  28         info->uptime = tmp.uptime;
  29         info->loads[0] = tmp.loads[0];
  30         info->loads[1] = tmp.loads[1];
  31         info->loads[2] = tmp.loads[2];
  32         kulong shifts;
  33         kulong max = tmp.totalram | tmp.totalswap;
  34         __asm__("bsr %1,%0" : "=r"(shifts) : "r"(max));
  35         shifts = shifts >= 32 ? shifts - 31 : 0;
  36         info->totalram = tmp.totalram >> shifts;
  37         info->freeram = tmp.freeram >> shifts;
  38         info->sharedram = tmp.sharedram >> shifts;
  39         info->bufferram = tmp.bufferram >> shifts;
  40         info->totalswap = tmp.totalswap >> shifts;
  41         info->freeswap = tmp.freeswap >> shifts;
  42         info->procs = tmp.procs ;
  43         info->totalhigh = tmp.totalhigh >> shifts;
  44         info->freehigh = tmp.freehigh >> shifts;
  45         info->mem_unit = (tmp.mem_unit ? tmp.mem_unit : 1) << shifts;
  46         return ret;
  47 }
  48
  49 weak_alias(__lsysinfo, sysinfo);