366d18b2b8
This functionality is required for BSD top(1), as exposed through
the CTL_KERN KERN_CP_TIME sysctl(2) call. The idea is that the
overall time spent in the system is divided into five categories.
While NetBSD uses a separate category for the kernel ("system") and
interrupts, we redefine "system" to mean userspace system services
and "interrupts" to mean time spent in the kernel, thereby providing
the same categories as MINIX3's own top(1), while adding the "nice"
category which, like on NetBSD, is used for time spent by processes
with a priority lowered by the system administrator.
Change-Id: I2114148d1e07d9635055ceca7b163f337c53c43a
229 lines
6.6 KiB
C
229 lines
6.6 KiB
C
/* The kernel call implemented in this file:
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* m_type: SYS_GETINFO
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*
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* The parameters for this kernel call are:
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* m_lsys_krn_sys_getinfo.request (what info to get)
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* m_lsys_krn_sys_getinfo.val_ptr (where to put it)
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* m_lsys_krn_sys_getinfo.val_len (maximum length expected, optional)
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* m_lsys_krn_sys_getinfo.val_ptr2 (second, optional pointer)
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* m_lsys_krn_sys_getinfo.val_len2_e (second length or process nr)
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*
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* Upon return of the GETWHOAMI request the following parameters are used:
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* m_krn_lsys_sys_getwhoami.endpt (the caller endpoint)
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* m_krn_lsys_sys_getwhoami.privflags (the caller priviledes)
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* m_krn_lsys_sys_getwhoami.initflags (the caller initflags)
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* m_krn_lsys_sys_getwhoami.name (the caller process name)
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*
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*/
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#include <string.h>
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#include "kernel/system.h"
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#if USE_GETINFO
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#include <minix/u64.h>
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#include <sys/resource.h>
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/*===========================================================================*
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* update_idle_time *
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*===========================================================================*/
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static void update_idle_time(void)
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{
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int i;
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struct proc * idl = proc_addr(IDLE);
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idl->p_cycles = make64(0, 0);
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for (i = 0; i < CONFIG_MAX_CPUS ; i++) {
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idl->p_cycles += get_cpu_var(i, idle_proc).p_cycles;
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}
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}
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/*===========================================================================*
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* do_getinfo *
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*===========================================================================*/
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int do_getinfo(struct proc * caller, message * m_ptr)
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{
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/* Request system information to be copied to caller's address space. This
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* call simply copies entire data structures to the caller.
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*/
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size_t length;
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vir_bytes src_vir;
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int nr_e, nr, r;
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int wipe_rnd_bin = -1;
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struct proc *p;
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struct rusage r_usage;
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/* Set source address and length based on request type. */
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switch (m_ptr->m_lsys_krn_sys_getinfo.request) {
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case GET_MACHINE: {
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length = sizeof(struct machine);
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src_vir = (vir_bytes) &machine;
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break;
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}
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case GET_KINFO: {
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length = sizeof(struct kinfo);
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src_vir = (vir_bytes) &kinfo;
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break;
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}
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case GET_LOADINFO: {
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length = sizeof(struct loadinfo);
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src_vir = (vir_bytes) &kloadinfo;
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break;
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}
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case GET_CPUINFO: {
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length = sizeof(cpu_info);
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src_vir = (vir_bytes) &cpu_info;
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break;
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}
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case GET_HZ: {
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length = sizeof(system_hz);
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src_vir = (vir_bytes) &system_hz;
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break;
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}
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case GET_IMAGE: {
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length = sizeof(struct boot_image) * NR_BOOT_PROCS;
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src_vir = (vir_bytes) image;
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break;
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}
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case GET_IRQHOOKS: {
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length = sizeof(struct irq_hook) * NR_IRQ_HOOKS;
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src_vir = (vir_bytes) irq_hooks;
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break;
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}
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case GET_PROCTAB: {
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update_idle_time();
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length = sizeof(struct proc) * (NR_PROCS + NR_TASKS);
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src_vir = (vir_bytes) proc;
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break;
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}
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case GET_PRIVTAB: {
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length = sizeof(struct priv) * (NR_SYS_PROCS);
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src_vir = (vir_bytes) priv;
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break;
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}
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case GET_PROC: {
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nr_e = (m_ptr->m_lsys_krn_sys_getinfo.val_len2_e == SELF) ?
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caller->p_endpoint : m_ptr->m_lsys_krn_sys_getinfo.val_len2_e;
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if(!isokendpt(nr_e, &nr)) return EINVAL; /* validate request */
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length = sizeof(struct proc);
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src_vir = (vir_bytes) proc_addr(nr);
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break;
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}
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case GET_PRIV: {
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nr_e = (m_ptr->m_lsys_krn_sys_getinfo.val_len2_e == SELF) ?
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caller->p_endpoint : m_ptr->m_lsys_krn_sys_getinfo.val_len2_e;
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if(!isokendpt(nr_e, &nr)) return EINVAL; /* validate request */
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length = sizeof(struct priv);
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src_vir = (vir_bytes) priv_addr(nr_to_id(nr));
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break;
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}
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case GET_REGS: {
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nr_e = (m_ptr->m_lsys_krn_sys_getinfo.val_len2_e == SELF) ?
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caller->p_endpoint : m_ptr->m_lsys_krn_sys_getinfo.val_len2_e;
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if(!isokendpt(nr_e, &nr)) return EINVAL; /* validate request */
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p = proc_addr(nr);
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length = sizeof(p->p_reg);
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src_vir = (vir_bytes) &p->p_reg;
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break;
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}
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case GET_WHOAMI: {
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int len;
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m_ptr->m_krn_lsys_sys_getwhoami.endpt = caller->p_endpoint;
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len = MIN(sizeof(m_ptr->m_krn_lsys_sys_getwhoami.name),
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sizeof(caller->p_name))-1;
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strncpy(m_ptr->m_krn_lsys_sys_getwhoami.name, caller->p_name, len);
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m_ptr->m_krn_lsys_sys_getwhoami.name[len] = '\0';
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m_ptr->m_krn_lsys_sys_getwhoami.privflags = priv(caller)->s_flags;
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m_ptr->m_krn_lsys_sys_getwhoami.initflags = priv(caller)->s_init_flags;
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return OK;
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}
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case GET_MONPARAMS: {
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src_vir = (vir_bytes) kinfo.param_buf;
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length = sizeof(kinfo.param_buf);
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break;
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}
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case GET_RANDOMNESS: {
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static struct k_randomness copy; /* copy to keep counters */
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int i;
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copy = krandom;
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for (i= 0; i<RANDOM_SOURCES; i++) {
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krandom.bin[i].r_size = 0; /* invalidate random data */
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krandom.bin[i].r_next = 0;
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}
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length = sizeof(copy);
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src_vir = (vir_bytes) ©
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break;
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}
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case GET_RANDOMNESS_BIN: {
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int bin = m_ptr->m_lsys_krn_sys_getinfo.val_len2_e;
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if(bin < 0 || bin >= RANDOM_SOURCES) {
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printf("SYSTEM: GET_RANDOMNESS_BIN: %d out of range\n", bin);
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return EINVAL;
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}
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if(krandom.bin[bin].r_size < RANDOM_ELEMENTS)
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return ENOENT;
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length = sizeof(krandom.bin[bin]);
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src_vir = (vir_bytes) &krandom.bin[bin];
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wipe_rnd_bin = bin;
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break;
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}
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case GET_IRQACTIDS: {
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length = sizeof(irq_actids);
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src_vir = (vir_bytes) irq_actids;
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break;
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}
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case GET_IDLETSC: {
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struct proc * idl;
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update_idle_time();
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idl = proc_addr(IDLE);
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length = sizeof(idl->p_cycles);
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src_vir = (vir_bytes) &idl->p_cycles;
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break;
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}
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case GET_CPUTICKS: {
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uint64_t ticks[MINIX_CPUSTATES];
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unsigned int cpu;
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cpu = (unsigned int)m_ptr->m_lsys_krn_sys_getinfo.val_len2_e;
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if (cpu >= CONFIG_MAX_CPUS)
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return EINVAL;
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get_cpu_ticks(cpu, ticks);
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length = sizeof(ticks);
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src_vir = (vir_bytes)ticks;
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break;
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}
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default:
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printf("do_getinfo: invalid request %d\n",
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m_ptr->m_lsys_krn_sys_getinfo.request);
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return(EINVAL);
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}
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/* Try to make the actual copy for the requested data. */
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if (m_ptr->m_lsys_krn_sys_getinfo.val_len > 0 &&
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length > m_ptr->m_lsys_krn_sys_getinfo.val_len)
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return (E2BIG);
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r = data_copy_vmcheck(caller, KERNEL, src_vir, caller->p_endpoint,
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m_ptr->m_lsys_krn_sys_getinfo.val_ptr, length);
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if(r != OK) return r;
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if(wipe_rnd_bin >= 0 && wipe_rnd_bin < RANDOM_SOURCES) {
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krandom.bin[wipe_rnd_bin].r_size = 0;
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krandom.bin[wipe_rnd_bin].r_next = 0;
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}
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return(OK);
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}
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#endif /* USE_GETINFO */
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