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Fix to device table at FS.

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BIOS and AT installed in /sbin.
Floppy boot fixed.
This commit is contained in:
Jorrit Herder
2005-08-05 18:57:20 +00:00
parent cfd27c36cb
commit 941b5ebd1c
13 changed files with 98 additions and 79 deletions
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34
kernel/proc.c
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@@ -105,7 +105,6 @@ message *m_ptr; /* pointer to message in the caller's space */
unsigned flags = call_nr & SYSCALL_FLAGS; /* get flags */
int mask_entry; /* bit to check in send mask */
int result; /* the system call's result */
vir_bytes vb; /* message buffer pointer as vir_bytes */
vir_clicks vlo, vhi; /* virtual clicks containing message to send */
/* Check if the process has privileges for the requested call. Calls to the
@@ -113,13 +112,17 @@ message *m_ptr; /* pointer to message in the caller's space */
* if the caller doesn't do receive().
*/
if (! (priv(caller_ptr)->s_trap_mask & (1 << function)) ||
(iskerneln(src_dst) && function != SENDREC))
return(ECALLDENIED);
(iskerneln(src_dst) && function != SENDREC)) {
kprintf("sys_call: trap not allowed, function %d, caller %d\n",
function, proc_nr(caller_ptr));
return(ECALLDENIED); /* call denied by trap mask */
}
/* Require a valid source and/ or destination process, unless echoing. */
if (! (isokprocn(src_dst) || src_dst == ANY || function == ECHO)) {
kprintf("sys_call: function %d, src_dst %d\n", function, src_dst);
return(EBADSRCDST);
kprintf("sys_call: invalid src_dst, src_dst %d, caller %d\n",
src_dst, proc_nr(caller_ptr));
return(EBADSRCDST); /* invalid process number */
}
/* If the call involves a message buffer, i.e., for SEND, RECEIVE, SENDREC,
@@ -128,12 +131,15 @@ message *m_ptr; /* pointer to message in the caller's space */
* for machines which don't have the gap mapped.
*/
if (function & CHECK_PTR) {
vb = (vir_bytes) m_ptr; /* virtual clicks */
vlo = vb >> CLICK_SHIFT; /* bottom of message */
vhi = (vb + MESS_SIZE - 1) >> CLICK_SHIFT; /* top of message */
vlo = (vir_bytes) m_ptr >> CLICK_SHIFT;
vhi = ((vir_bytes) m_ptr + MESS_SIZE - 1) >> CLICK_SHIFT;
if (vlo < caller_ptr->p_memmap[D].mem_vir || vlo > vhi ||
vhi >= caller_ptr->p_memmap[S].mem_vir +
caller_ptr->p_memmap[S].mem_len) return(EFAULT);
caller_ptr->p_memmap[S].mem_len) {
kprintf("sys_call: invalid message pointer, function %d, caller %d\n",
function, proc_nr(caller_ptr));
return(EFAULT); /* invalid message pointer */
}
}
/* If the call is to send to a process, i.e., for SEND, SENDREC or NOTIFY,
@@ -142,12 +148,16 @@ message *m_ptr; /* pointer to message in the caller's space */
*/
if (function & CHECK_DST) {
if (! get_sys_bit(priv(caller_ptr)->s_ipc_to, nr_to_id(src_dst))) {
kprintf("Warning, send_mask denied %d sending to %d\n",
kprintf("sys_call: ipc mask denied %d sending to %d\n",
proc_nr(caller_ptr), src_dst);
return(ECALLDENIED);
return(ECALLDENIED); /* call denied by ipc mask */
}
if (isemptyn(src_dst)) return(EDEADDST); /* cannot send to the dead */
if (isemptyn(src_dst)) {
kprintf("sys_call: dead destination, function %d, caller %d\n",
function, proc_nr(caller_ptr));
return(EDEADDST); /* cannot send to the dead */
}
}
/* Now check if the call is known and try to perform the request. The only