int do_cpuvar(struct proc *caller_ptr, message *m_ptr){
char *p_pi_ptr = m_ptr->m1_p1;
int i;
struct proc **queueHeadPtr = NULL;
struct proc qh_send[NR_SCHED_QUEUES];
struct proc nullProc;
queueHeadPtr = get_cpu_var(0,run_q_head);
nullProc.p_priority = -1;
for(i=0; i<NR_SCHED_QUEUES; i++){
qh_send[i] = nullProc;
}
for(i=0; i<NR_SCHED_QUEUES; i++){
if(queueHeadPtr[i]){
qh_send[i] = *queueHeadPtr[i];
}
}
data_copy_vmcheck(caller_ptr, KERNEL,(vir_bytes) &qh_send, caller_ptr->p_endpoint,(vir_bytes) p_pi_ptr, sizeof(struct proc)*NR_SCHED_QUEUES);
return(OK);
}
/*===========================================================================*
* do_sysctl *
*===========================================================================*/
PUBLIC int do_sysctl(struct proc * caller, message * m_ptr)
{
vir_bytes len, buf;
static char mybuf[DIAG_BUFSIZE];
int s, i, proc_nr;
switch (m_ptr->SYSCTL_CODE) {
case SYSCTL_CODE_DIAG:
buf = (vir_bytes) m_ptr->SYSCTL_ARG1;
len = (vir_bytes) m_ptr->SYSCTL_ARG2;
if(len < 1 || len > DIAG_BUFSIZE) {
printf("do_sysctl: diag for %d: len %d out of range\n",
caller->p_endpoint, len);
return EINVAL;
}
if((s=data_copy_vmcheck(caller, caller->p_endpoint, buf, KERNEL,
(vir_bytes) mybuf, len)) != OK) {
printf("do_sysctl: diag for %d: len %d: copy failed: %d\n",
caller->p_endpoint, len, s);
return s;
}
for(i = 0; i < len; i++)
kputc(mybuf[i]);
kputc(END_OF_KMESS);
return OK;
case SYSCTL_CODE_STACKTRACE:
if(!isokendpt(m_ptr->SYSCTL_ARG2, &proc_nr))
return EINVAL;
proc_stacktrace(proc_addr(proc_nr));
proc_dump_regs(proc_addr(proc_nr));
return OK;
default:
printf("do_sysctl: invalid request %d\n", m_ptr->SYSCTL_CODE);
return(EINVAL);
}
panic("do_sysctl: can't happen");
return(OK);
}
/*===========================================================================*
* do_getinfo *
*===========================================================================*/
int do_getinfo(struct proc * caller, message * m_ptr)
{
/* Request system information to be copied to caller's address space. This
* call simply copies entire data structures to the caller.
*/
size_t length;
vir_bytes src_vir;
int nr_e, nr, r;
int wipe_rnd_bin = -1;
struct proc *p;
/* Set source address and length based on request type. */
switch (m_ptr->I_REQUEST) {
case GET_MACHINE: {
length = sizeof(struct machine);
src_vir = (vir_bytes) &machine;
break;
}
case GET_KINFO: {
length = sizeof(struct kinfo);
src_vir = (vir_bytes) &kinfo;
break;
}
case GET_LOADINFO: {
length = sizeof(struct loadinfo);
src_vir = (vir_bytes) &kloadinfo;
break;
}
case GET_CPUINFO: {
length = sizeof(cpu_info);
src_vir = (vir_bytes) &cpu_info;
break;
}
case GET_HZ: {
length = sizeof(system_hz);
src_vir = (vir_bytes) &system_hz;
break;
}
case GET_IMAGE: {
length = sizeof(struct boot_image) * NR_BOOT_PROCS;
src_vir = (vir_bytes) image;
break;
}
case GET_IRQHOOKS: {
length = sizeof(struct irq_hook) * NR_IRQ_HOOKS;
src_vir = (vir_bytes) irq_hooks;
break;
}
case GET_PROCTAB: {
update_idle_time();
length = sizeof(struct proc) * (NR_PROCS + NR_TASKS);
src_vir = (vir_bytes) proc;
break;
}
case GET_PRIVTAB: {
length = sizeof(struct priv) * (NR_SYS_PROCS);
src_vir = (vir_bytes) priv;
break;
}
case GET_PROC: {
nr_e = (m_ptr->I_VAL_LEN2_E == SELF) ?
caller->p_endpoint : m_ptr->I_VAL_LEN2_E;
if(!isokendpt(nr_e, &nr)) return EINVAL; /* validate request */
length = sizeof(struct proc);
src_vir = (vir_bytes) proc_addr(nr);
break;
}
case GET_PRIV: {
nr_e = (m_ptr->I_VAL_LEN2_E == SELF) ?
caller->p_endpoint : m_ptr->I_VAL_LEN2_E;
if(!isokendpt(nr_e, &nr)) return EINVAL; /* validate request */
length = sizeof(struct priv);
src_vir = (vir_bytes) priv_addr(nr_to_id(nr));
break;
}
case GET_REGS: {
nr_e = (m_ptr->I_VAL_LEN2_E == SELF) ?
caller->p_endpoint : m_ptr->I_VAL_LEN2_E;
if(!isokendpt(nr_e, &nr)) return EINVAL; /* validate request */
p = proc_addr(nr);
length = sizeof(p->p_reg);
src_vir = (vir_bytes) &p->p_reg;
break;
}
case GET_WHOAMI: {
int len;
/* GET_WHOAMI uses m3 and only uses the message contents for info. */
m_ptr->GIWHO_EP = caller->p_endpoint;
len = MIN(sizeof(m_ptr->GIWHO_NAME), sizeof(caller->p_name))-1;
strncpy(m_ptr->GIWHO_NAME, caller->p_name, len);
m_ptr->GIWHO_NAME[len] = '\0';
m_ptr->GIWHO_PRIVFLAGS = priv(caller)->s_flags;
return OK;
}
case GET_MONPARAMS: {
src_vir = (vir_bytes) params_buffer;
length = sizeof(params_buffer);
break;
}
case GET_RANDOMNESS: {
static struct k_randomness copy; /* copy to keep counters */
int i;
copy = krandom;
for (i= 0; i<RANDOM_SOURCES; i++) {
krandom.bin[i].r_size = 0; /* invalidate random data */
krandom.bin[i].r_next = 0;
}
length = sizeof(copy);
src_vir = (vir_bytes) ©
break;
}
case GET_RANDOMNESS_BIN: {
int bin = m_ptr->I_VAL_LEN2_E;
if(bin < 0 || bin >= RANDOM_SOURCES) {
printf("SYSTEM: GET_RANDOMNESS_BIN: %d out of range\n", bin);
return EINVAL;
}
if(krandom.bin[bin].r_size < RANDOM_ELEMENTS)
return ENOENT;
length = sizeof(krandom.bin[bin]);
src_vir = (vir_bytes) &krandom.bin[bin];
wipe_rnd_bin = bin;
break;
}
case GET_KMESSAGES: {
length = sizeof(struct kmessages);
src_vir = (vir_bytes) &kmess;
break;
}
case GET_IRQACTIDS: {
length = sizeof(irq_actids);
src_vir = (vir_bytes) irq_actids;
break;
}
case GET_IDLETSC: {
struct proc * idl;
update_idle_time();
idl = proc_addr(IDLE);
length = sizeof(idl->p_cycles);
src_vir = (vir_bytes) &idl->p_cycles;
break;
}
default:
printf("do_getinfo: invalid request %d\n", m_ptr->I_REQUEST);
return(EINVAL);
}
/* Try to make the actual copy for the requested data. */
if (m_ptr->I_VAL_LEN > 0 && length > m_ptr->I_VAL_LEN) return (E2BIG);
r = data_copy_vmcheck(caller, KERNEL, src_vir, caller->p_endpoint,
(vir_bytes) m_ptr->I_VAL_PTR, length);
if(r != OK) return r;
if(wipe_rnd_bin >= 0 && wipe_rnd_bin < RANDOM_SOURCES) {
krandom.bin[wipe_rnd_bin].r_size = 0;
krandom.bin[wipe_rnd_bin].r_next = 0;
}
return(OK);
}
/*===========================================================================*
* do_vumap *
*===========================================================================*/
int do_vumap(struct proc *caller, message *m_ptr)
{
/* Map a vector of grants or local virtual addresses to physical addresses.
* Designed to be used by drivers to perform an efficient lookup of physical
* addresses for the purpose of direct DMA from/to a remote process.
*/
endpoint_t endpt, source, granter;
struct proc *procp;
struct vumap_vir vvec[MAPVEC_NR];
struct vumap_phys pvec[MAPVEC_NR];
vir_bytes vaddr, paddr, vir_addr;
phys_bytes phys_addr;
int i, r, proc_nr, vcount, pcount, pmax, access;
size_t size, chunk, offset;
endpt = caller->p_endpoint;
/* Retrieve and check input parameters. */
source = m_ptr->VUMAP_ENDPT;
vaddr = (vir_bytes) m_ptr->VUMAP_VADDR;
vcount = m_ptr->VUMAP_VCOUNT;
offset = m_ptr->VUMAP_OFFSET;
access = m_ptr->VUMAP_ACCESS;
paddr = (vir_bytes) m_ptr->VUMAP_PADDR;
pmax = m_ptr->VUMAP_PMAX;
if (vcount <= 0 || pmax <= 0)
return EINVAL;
if (vcount > MAPVEC_NR) vcount = MAPVEC_NR;
if (pmax > MAPVEC_NR) pmax = MAPVEC_NR;
/* Convert access to safecopy access flags. */
switch (access) {
case VUA_READ: access = CPF_READ; break;
case VUA_WRITE: access = CPF_WRITE; break;
case VUA_READ|VUA_WRITE: access = CPF_READ|CPF_WRITE; break;
default: return EINVAL;
}
/* Copy in the vector of virtual addresses. */
size = vcount * sizeof(vvec[0]);
if (data_copy(endpt, vaddr, KERNEL, (vir_bytes) vvec, size) != OK)
return EFAULT;
pcount = 0;
/* Go through the input entries, one at a time. Stop early in case the output
* vector has filled up.
*/
for (i = 0; i < vcount && pcount < pmax; i++) {
size = vvec[i].vv_size;
if (size <= offset)
return EINVAL;
size -= offset;
if (source != SELF) {
r = verify_grant(source, endpt, vvec[i].vv_grant, size, access,
offset, &vir_addr, &granter);
if (r != OK)
return r;
} else {
vir_addr = vvec[i].vv_addr + offset;
granter = endpt;
}
okendpt(granter, &proc_nr);
procp = proc_addr(proc_nr);
/* Each virtual range is made up of one or more physical ranges. */
while (size > 0 && pcount < pmax) {
chunk = vm_lookup_range(procp, vir_addr, &phys_addr, size);
if (!chunk) {
/* Try to get the memory allocated, unless the memory
* is supposed to be there to be read from.
*/
if (access & CPF_READ)
return EFAULT;
/* This call may suspend the current call, or return an
* error for a previous invocation.
*/
return vm_check_range(caller, procp, vir_addr, size);
}
pvec[pcount].vp_addr = phys_addr;
pvec[pcount].vp_size = chunk;
pcount++;
vir_addr += chunk;
size -= chunk;
}
offset = 0;
}
/* Copy out the resulting vector of physical addresses. */
assert(pcount > 0);
size = pcount * sizeof(pvec[0]);
r = data_copy_vmcheck(caller, KERNEL, (vir_bytes) pvec, endpt, paddr, size);
if (r == OK)
m_ptr->VUMAP_PCOUNT = pcount;
return r;
}
/*===========================================================================*
* do_sigsend *
*===========================================================================*/
int do_sigsend(struct proc * caller, message * m_ptr)
{
/* Handle sys_sigsend, POSIX-style signal handling. */
struct sigmsg smsg;
register struct proc *rp;
struct sigcontext sc, *scp;
struct sigframe fr, *frp;
int proc_nr, r;
if (!isokendpt(m_ptr->SIG_ENDPT, &proc_nr)) return(EINVAL);
if (iskerneln(proc_nr)) return(EPERM);
rp = proc_addr(proc_nr);
/* Get the sigmsg structure into our address space. */
if((r=data_copy_vmcheck(caller, caller->p_endpoint,
(vir_bytes) m_ptr->SIG_CTXT_PTR, KERNEL, (vir_bytes) &smsg,
(phys_bytes) sizeof(struct sigmsg))) != OK)
return r;
/* Compute the user stack pointer where sigcontext will be stored. */
smsg.sm_stkptr = arch_get_sp(rp);
scp = (struct sigcontext *) smsg.sm_stkptr - 1;
/* Copy the registers to the sigcontext structure. */
memcpy(&sc.sc_regs, (char *) &rp->p_reg, sizeof(sigregs));
#if defined(__i386__)
sc.trap_style = rp->p_seg.p_kern_trap_style;
if(sc.trap_style == KTS_NONE) {
printf("do_sigsend: sigsend an unsaved process\n");
return EINVAL;
}
if(proc_used_fpu(rp)) {
/* save the FPU context before saving it to the sig context */
save_fpu(rp);
memcpy(&sc.sc_fpu_state, rp->p_seg.fpu_state, FPU_XFP_SIZE);
}
#endif
/* Finish the sigcontext initialization. */
sc.sc_mask = smsg.sm_mask;
sc.sc_flags = rp->p_misc_flags & MF_FPU_INITIALIZED;
/* Copy the sigcontext structure to the user's stack. */
if((r=data_copy_vmcheck(caller, KERNEL, (vir_bytes) &sc, m_ptr->SIG_ENDPT,
(vir_bytes) scp, (vir_bytes) sizeof(struct sigcontext))) != OK)
return r;
/* Initialize the sigframe structure. */
frp = (struct sigframe *) scp - 1;
fr.sf_scpcopy = scp;
fr.sf_retadr2= (void (*)()) rp->p_reg.pc;
fr.sf_fp = rp->p_reg.fp;
rp->p_reg.fp = (reg_t) &frp->sf_fp;
fr.sf_scp = scp;
fpu_sigcontext(rp, &fr, &sc);
fr.sf_signo = smsg.sm_signo;
fr.sf_retadr = (void (*)()) smsg.sm_sigreturn;
#if defined(__arm__)
/* use the ARM link register to set the return address from the signal
* handler
*/
rp->p_reg.lr = (reg_t) fr.sf_retadr;
if(rp->p_reg.lr & 1) { printf("sigsend: LSB LR makes no sense.\n"); }
/* pass signal handler parameters in registers */
rp->p_reg.retreg = (reg_t) fr.sf_signo;
rp->p_reg.r1 = (reg_t) fr.sf_code;
rp->p_reg.r2 = (reg_t) fr.sf_scp;
rp->p_misc_flags |= MF_CONTEXT_SET;
#endif
/* Copy the sigframe structure to the user's stack. */
if((r=data_copy_vmcheck(caller, KERNEL, (vir_bytes) &fr,
m_ptr->SIG_ENDPT, (vir_bytes) frp,
(vir_bytes) sizeof(struct sigframe))) != OK)
return r;
/* Reset user registers to execute the signal handler. */
rp->p_reg.sp = (reg_t) frp;
rp->p_reg.pc = (reg_t) smsg.sm_sighandler;
/* Signal handler should get clean FPU. */
rp->p_misc_flags &= ~MF_FPU_INITIALIZED;
if(!RTS_ISSET(rp, RTS_PROC_STOP)) {
printf("system: warning: sigsend a running process\n");
printf("caller stack: ");
proc_stacktrace(caller);
}
return(OK);
}
/*===========================================================================*
* do_sigsend *
*===========================================================================*/
PUBLIC int do_sigsend(struct proc * caller, message * m_ptr)
{
/* Handle sys_sigsend, POSIX-style signal handling. */
struct sigmsg smsg;
register struct proc *rp;
struct sigcontext sc, *scp;
struct sigframe fr, *frp;
int proc_nr, r;
if (!isokendpt(m_ptr->SIG_ENDPT, &proc_nr)) return(EINVAL);
if (iskerneln(proc_nr)) return(EPERM);
rp = proc_addr(proc_nr);
/* Get the sigmsg structure into our address space. */
if((r=data_copy_vmcheck(caller, caller->p_endpoint,
(vir_bytes) m_ptr->SIG_CTXT_PTR, KERNEL, (vir_bytes) &smsg,
(phys_bytes) sizeof(struct sigmsg))) != OK)
return r;
/* Compute the user stack pointer where sigcontext will be stored. */
scp = (struct sigcontext *) smsg.sm_stkptr - 1;
/* Copy the registers to the sigcontext structure. */
memcpy(&sc.sc_regs, (char *) &rp->p_reg, sizeof(sigregs));
#if (_MINIX_CHIP == _CHIP_INTEL)
if(proc_used_fpu(rp)) {
/* save the FPU context before saving it to the sig context */
save_fpu(rp);
memcpy(&sc.sc_fpu_state, rp->p_fpu_state.fpu_save_area_p,
FPU_XFP_SIZE);
}
#endif
/* Finish the sigcontext initialization. */
sc.sc_mask = smsg.sm_mask;
sc.sc_flags = rp->p_misc_flags & MF_FPU_INITIALIZED;
/* Copy the sigcontext structure to the user's stack. */
if((r=data_copy_vmcheck(caller, KERNEL, (vir_bytes) &sc, m_ptr->SIG_ENDPT,
(vir_bytes) scp, (vir_bytes) sizeof(struct sigcontext))) != OK)
return r;
/* Initialize the sigframe structure. */
frp = (struct sigframe *) scp - 1;
fr.sf_scpcopy = scp;
fr.sf_retadr2= (void (*)()) rp->p_reg.pc;
fr.sf_fp = rp->p_reg.fp;
rp->p_reg.fp = (reg_t) &frp->sf_fp;
fr.sf_scp = scp;
fpu_sigcontext(rp, &fr, &sc);
fr.sf_signo = smsg.sm_signo;
fr.sf_retadr = (void (*)()) smsg.sm_sigreturn;
/* Copy the sigframe structure to the user's stack. */
if((r=data_copy_vmcheck(caller, KERNEL, (vir_bytes) &fr,
m_ptr->SIG_ENDPT, (vir_bytes) frp,
(vir_bytes) sizeof(struct sigframe))) != OK)
return r;
/* Reset user registers to execute the signal handler. */
rp->p_reg.sp = (reg_t) frp;
rp->p_reg.pc = (reg_t) smsg.sm_sighandler;
/* Signal handler should get clean FPU. */
rp->p_misc_flags &= ~MF_FPU_INITIALIZED;
if(!RTS_ISSET(rp, RTS_PROC_STOP)) {
printf("system: warning: sigsend a running process\n");
printf("caller stack: ");
proc_stacktrace(caller);
}
return(OK);
}
