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Kernel changes:

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- reinstalled priority changing, now in sched() and unready()
- reinstalled check on message buffer in sys_call()
- reinstalled check in send masks in sys_call()
- changed do_fork() to get new privilege structure for SYS_PROCs
- removed some processes from boot image---will be dynamically started later
This commit is contained in:
Jorrit Herder
2005-07-26 12:48:34 +00:00
parent 153fdabb26
commit 8866b4d0ef
15 changed files with 160 additions and 124 deletions
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18
kernel/main.c
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@@ -49,7 +49,7 @@ PUBLIC void main()
/* Clear the process table. Anounce each slot as empty and set up mappings
* for proc_addr() and proc_nr() macros. Do the same for the table with
* system properties structures.
* privilege structures for the system processes.
*/
for (rp = BEG_PROC_ADDR, i = -NR_TASKS; rp < END_PROC_ADDR; ++rp, ++i) {
rp->p_rts_flags = SLOT_FREE; /* initialize free slot */
@@ -76,17 +76,17 @@ PUBLIC void main()
for (i=0; i < NR_BOOT_PROCS; ++i) {
ip = &image[i]; /* process' attributes */
rp = proc_addr(ip->proc_nr); /* get process pointer */
rp->p_name[P_NAME_LEN-1] = '\0'; /* just for safety */
rp->p_max_priority = ip->priority; /* max scheduling priority */
rp->p_priority = ip->priority; /* current priority */
rp->p_quantum_size = ip->quantum; /* quantum size in ticks */
rp->p_sched_ticks = ip->quantum; /* current credit */
rp->p_full_quantums = QUANTUMS(ip->priority); /* nr quantums left */
strncpy(rp->p_name, ip->proc_name, P_NAME_LEN); /* set process name */
(void) set_priv(rp, (ip->flags & SYS_PROC)); /* assign structure */
rp->p_priv->s_flags = ip->flags; /* process flags */
rp->p_priv->s_call_mask = ip->call_mask;/* allowed system calls */
if (i-NR_TASKS < 0) { /* part of the kernel? */
(void) get_priv(rp, (ip->flags & SYS_PROC)); /* assign structure */
priv(rp)->s_flags = ip->flags; /* process flags */
priv(rp)->s_call_mask = ip->call_mask; /* allowed traps */
priv(rp)->s_send_mask.chunk[0] = ip->send_mask; /* restrict targets */
if (iskerneln(proc_nr(rp))) { /* part of the kernel? */
if (ip->stksize > 0) { /* HARDWARE stack size is 0 */
rp->p_priv->s_stack_guard = (reg_t *) ktsb;
*rp->p_priv->s_stack_guard = STACK_GUARD;
@@ -97,14 +97,14 @@ PUBLIC void main()
/* processes that are in the kernel */
hdrindex = 0; /* all use the first a.out header */
} else {
hdrindex = 1 + i-NR_TASKS; /* drivers, servers, INIT follow */
hdrindex = 1 + i-NR_TASKS; /* servers, drivers, INIT */
}
/* The bootstrap loader created an array of the a.out headers at
* absolute address 'aout'. Get one element to e_hdr.
*/
phys_copy(aout + hdrindex * A_MINHDR, vir2phys(&e_hdr),
(phys_bytes) A_MINHDR);
(phys_bytes) A_MINHDR);
/* Convert addresses to clicks and build process memory map */
text_base = e_hdr.a_syms >> CLICK_SHIFT;
text_clicks = (e_hdr.a_text + CLICK_SIZE-1) >> CLICK_SHIFT;
@@ -127,7 +127,7 @@ PUBLIC void main()
/* Initialize the server stack pointer. Take it down one word
* to give crtso.s something to use as "argc".
*/
if (i-NR_TASKS >= 0) {
if (isusern(proc_nr(rp))) { /* user-space process? */
rp->p_reg.sp = (rp->p_memmap[S].mem_vir +
rp->p_memmap[S].mem_len) << CLICK_SHIFT;
rp->p_reg.sp -= sizeof(reg_t);