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Change allowed kernel call bitmap to an array of bitmaps to allow

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any number of kernel calls.

Allowed kernel calls are stored in table.c for every image process as a
variably-sized array of allowed calls. This is used to fill the bitmap
of size determined at compile time by the number of kernel calls. This
filling is done by main.c. There is a special call called SYS_ALL_CALLS
which fills the bitmap of allowed calls completely, if that is the only
entry in the array.
This commit is contained in:
Ben Gras
2006-06-20 09:56:06 +00:00
parent eecb40cf21
commit 2e89eb5270
4 changed files with 66 additions and 28 deletions
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22
kernel/main.c
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@@ -73,6 +73,8 @@ PUBLIC void main()
ktsb = (reg_t) t_stack;
for (i=0; i < NR_BOOT_PROCS; ++i) {
int ci;
bitchunk_t fv;
ip = &image[i]; /* process' attributes */
rp = proc_addr(ip->proc_nr); /* get process pointer */
ip->endpoint = rp->p_endpoint; /* ipc endpoint */
@@ -84,7 +86,23 @@ PUBLIC void main()
(void) get_priv(rp, (ip->flags & SYS_PROC)); /* assign structure */
priv(rp)->s_flags = ip->flags; /* process flags */
priv(rp)->s_trap_mask = ip->trap_mask; /* allowed traps */
priv(rp)->s_call_mask = ip->call_mask; /* kernel call mask */
/* Initialize call mask bitmap from unordered set.
* A single SYS_ALL_CALLS is a special case - it
* means all calls are allowed.
*/
if(ip->nr_k_calls == 1 && ip->k_calls[0] == SYS_ALL_CALLS)
fv = ~0; /* fill call mask */
else
fv = 0; /* clear call mask */
for(ci = 0; ci < CALL_MASK_SIZE; ci++) /* fill or clear call mask */
priv(rp)->s_k_call_mask[ci] = fv;
if(!fv) /* not all full? enter calls bit by bit */
for(ci = 0; ci < ip->nr_k_calls; ci++)
SET_BIT(priv(rp)->s_k_call_mask,
ip->k_calls[ci]-KERNEL_CALL);
priv(rp)->s_ipc_to.chunk[0] = ip->ipc_to; /* restrict targets */
if (iskerneln(proc_nr(rp))) { /* part of the kernel? */
if (ip->stksize > 0) { /* HARDWARE stack size is 0 */
@@ -185,7 +203,7 @@ PRIVATE void announce(void)
#if (CHIP == INTEL)
/* Real mode, or 16/32-bit protected mode? */
kprintf("Executing in %s mode.\n\n",
machine.protected ? "32-bit protected" : "real");
machine.prot ? "32-bit protected" : "real");
#endif
}