1#include <sys/sysinfo.h> 2#include "syscall.h" 3 4#define klong long long 5#define kulong unsigned long long 6 7struct 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 23int __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 49weak_alias(__lsysinfo, sysinfo); 50