sanchayanmaity/minix
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Keep track of error statistics, rate limit debug output, added SYS_MAPDMA.

Browse source
This commit is contained in:
Philip Homburg 2008-02-22 12:38:22 +00:00
parent 992edfd558
commit 73ea967b6c
1 changed files with 22 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
kernel/system.c
View file

@ -37,6 +37,7 @@
#include <sys/sigcontext.h>
#include <minix/endpoint.h>
#include <minix/safecopies.h>
#include <minix/u64.h>
/* Declaration of the call vector that defines the mapping of system calls
* to handler functions. The vector is initialized in sys_init() with map(),
@ -77,19 +78,37 @@ PUBLIC void sys_task()
okendpt(who_e, &who_p);
caller_ptr = proc_addr(who_p);
if (caller_ptr->p_endpoint == ipc_stats_target)
sys_stats.total= add64u(sys_stats.total, 1);
/* See if the caller made a valid request and try to handle it. */
if (call_nr < 0 || call_nr >= NR_SYS_CALLS) { /* check call number */
#if DEBUG_ENABLE_IPC_WARNINGS
kprintf("SYSTEM: illegal request %d from %d.\n",
call_nr,m.m_source);
#endif
if (caller_ptr->p_endpoint == ipc_stats_target)
sys_stats.bad_req++;
result = EBADREQUEST; /* illegal message type */
}
else if (!GET_BIT(priv(caller_ptr)->s_k_call_mask, call_nr)) {
#if DEBUG_ENABLE_IPC_WARNINGS
kprintf("SYSTEM: request %d from %d denied.\n",
call_nr,m.m_source);
static int curr= 0, limit= 100, extra= 20;
if (curr < limit+extra)
{
kprintf("SYSTEM: request %d from %d denied.\n",
call_nr, m.m_source);
} else if (curr == limit+extra)
{
kprintf("sys_task: no debug output for a while\n");
}
else if (curr == 2*limit-1)
limit *= 2;
curr++;
#endif
if (caller_ptr->p_endpoint == ipc_stats_target)
sys_stats.not_allowed++;
result = ECALLDENIED; /* illegal message type */
}
else {
@ -194,6 +213,7 @@ PRIVATE void initialize(void)
map(SYS_READBIOS, do_readbios); /* read from BIOS locations */
map(SYS_IOPENABLE, do_iopenable); /* Enable I/O */
map(SYS_SDEVIO, do_sdevio); /* phys_insb, _insw, _outsb, _outsw */
map(SYS_MAPDMA, do_mapdma);
#endif
}