208 lines
6.8 KiB
C
208 lines
6.8 KiB
C
#include "../kernel.h"
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#include "../system.h"
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#include <unistd.h>
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INIT_ASSERT
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/*===========================================================================*
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* do_unused *
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*===========================================================================*/
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PUBLIC int do_unused(m)
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message *m; /* pointer to request message */
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{
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kprintf("SYS task got illegal request from %d.", m->m_source);
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return(EBADREQUEST); /* illegal message type */
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}
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/*===========================================================================*
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* do_random *
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*===========================================================================*/
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PUBLIC int do_random(m)
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message *m; /* pointer to request message */
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{
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return(ENOSYS); /* no yet implemented */
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}
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/* The system call implemented in this file:
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* m_type: SYS_ABORT
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*
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* The parameters for this system call are:
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* m1_i1: ABRT_HOW (how to abort, possibly fetch monitor params)
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* m1_i2: ABRT_MON_PROC (proc nr to get monitor params from)
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* m1_i3: ABRT_MON_LEN (length of monitor params)
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* m1_p1: ABRT_MON_ADDR (virtual address of params)
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*/
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/*===========================================================================*
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* do_abort *
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*===========================================================================*/
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PUBLIC int do_abort(m_ptr)
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message *m_ptr; /* pointer to request message */
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{
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/* Handle sys_abort. MINIX is unable to continue. This can originate in the
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* PM (normal abort or panic) or FS (panic), or TTY (a CTRL-ALT-DEL or ESC
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* after debugging dumps).
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*/
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register struct proc *rp;
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phys_bytes src_phys;
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vir_bytes len;
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int how = m_ptr->ABRT_HOW;
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rp = proc_addr(m_ptr->m_source);
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if (how == RBT_MONITOR) {
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/* The monitor is to run user specified instructions. */
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len = m_ptr->ABRT_MON_LEN + 1;
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assert(len <= kinfo.params_size);
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src_phys = numap_local(m_ptr->ABRT_MON_PROC,
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(vir_bytes) m_ptr->ABRT_MON_ADDR, len);
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assert(src_phys != 0);
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phys_copy(src_phys, kinfo.params_base, (phys_bytes) len);
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}
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prepare_shutdown(how);
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return(OK); /* pro-forma (really EDISASTER) */
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}
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/* The system 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 system call are:
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* m1_i3: I_REQUEST (what info to get)
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* m1_i4: I_PROC_NR (process to store value at)
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* m1_p1: I_VAL_PTR (where to put it)
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* m1_i1: I_VAL_LEN (maximum length expected, optional)
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* m1_p2: I_KEY_PTR (environment variable key)
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* m1_i2: I_KEY_LEN (lenght of environment variable key)
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*
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* Author:
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* Jorrit N. Herder <jnherder@cs.vu.nl>
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*/
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/*===========================================================================*
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* do_getinfo *
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*===========================================================================*/
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PUBLIC int do_getinfo(m_ptr)
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register message *m_ptr; /* pointer to request message */
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{
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/* Request system information to be copied to caller's address space. */
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size_t length;
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phys_bytes src_phys;
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phys_bytes dst_phys;
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int proc_nr, nr;
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/* Set source address and length based on request type. */
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switch (m_ptr->I_REQUEST) {
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case GET_MACHINE: {
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length = sizeof(struct machine);
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src_phys = vir2phys(&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_phys = vir2phys(&kinfo);
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break;
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}
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case GET_IMAGE: {
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length = sizeof(struct system_image) * IMAGE_SIZE;
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src_phys = vir2phys(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_phys = vir2phys(irq_hooks);
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break;
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}
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case GET_MEMCHUNKS: {
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length = sizeof(struct memory) * NR_MEMS;
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src_phys = vir2phys(mem);
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break;
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}
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case GET_SCHEDINFO: {
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/* This is slightly complicated because we need two data structures
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* at once, otherwise the scheduling information may be incorrect.
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* Copy the queue heads and fall through to copy the process table.
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*/
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length = sizeof(struct proc *) * NR_SCHED_QUEUES;
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src_phys = vir2phys(rdy_head);
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dst_phys = numap_local(m_ptr->m_source, (vir_bytes) m_ptr->I_KEY_PTR,
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length);
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if (src_phys == 0 || dst_phys == 0) return(EFAULT);
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phys_copy(src_phys, dst_phys, length);
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}
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case GET_PROCTAB: {
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length = sizeof(struct proc) * (NR_PROCS + NR_TASKS);
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src_phys = vir2phys(proc);
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break;
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}
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case GET_PROC: {
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nr = (m_ptr->I_KEY_LEN == SELF) ? m_ptr->m_source : m_ptr->I_KEY_LEN;
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if (! isokprocn(nr)) return(EINVAL);
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length = sizeof(struct proc);
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src_phys = vir2phys(proc_addr(nr));
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break;
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}
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case GET_MONPARAMS: {
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src_phys = kinfo.params_base; /* already is a physical address! */
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length = kinfo.params_size;
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break;
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}
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case GET_PROCNR: {
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if (m_ptr->I_KEY_LEN == 0) { /* get own process nr */
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#if DEAD_CODE
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/* GET_PROCNR functionality will be moved to the Process Manager! */
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kprintf("GET_PROCNR (own) from %d\n", m_ptr->m_source);
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#endif
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src_phys = vir2phys(&proc_nr);
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length = sizeof(int);
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} else { /* lookup nr by name */
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int proc_found = FALSE;
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struct proc *pp;
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struct vir_addr vsrc, vdst;
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char key[8]; /* storage for process name to lookup */
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#if DEAD_CODE
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/* GET_PROCNR functionality will be moved to the Process Manager! */
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kprintf("GET_PROCNR (by name) from %d\n", m_ptr->m_source);
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#endif
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proc_nr = m_ptr->m_source; /* only caller can request copy */
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if (m_ptr->I_KEY_LEN > sizeof(key)) return(EINVAL);
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vsrc.proc_nr = proc_nr; vsrc.segment = D; vsrc.offset = (vir_bytes) m_ptr->I_KEY_PTR;
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vdst.proc_nr = SYSTASK, vdst.segment = D; vdst.offset = (vir_bytes) key;
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if (virtual_copy(&vsrc, &vdst, m_ptr->I_KEY_LEN) != OK) return(EFAULT);
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#if DEAD_CODE
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if (vir_copy(proc_nr, (vir_bytes) m_ptr->I_KEY_PTR, SYSTASK,
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(vir_bytes) key, m_ptr->I_KEY_LEN) != OK) return(EFAULT);
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#endif
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for (pp=BEG_PROC_ADDR; pp<END_PROC_ADDR; pp++) {
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if (kstrncmp(pp->p_name, key, m_ptr->I_KEY_LEN) == 0) {
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src_phys = vir2phys(&(pp->p_nr));
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length = sizeof(int);
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proc_found = TRUE;
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break;
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}
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}
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if (! proc_found) return(ESRCH);
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}
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break;
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}
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case GET_KMESSAGES: {
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length = sizeof(struct kmessages);
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src_phys = vir2phys(&kmess);
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break;
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}
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default:
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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->I_VAL_LEN > 0 && length > m_ptr->I_VAL_LEN) return (E2BIG);
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proc_nr = m_ptr->m_source; /* only caller can request copy */
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dst_phys = numap_local(proc_nr, (vir_bytes) m_ptr->I_VAL_PTR, length);
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if (src_phys == 0 || dst_phys == 0) return(EFAULT);
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phys_copy(src_phys, dst_phys, length);
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return(OK);
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}
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