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Use the db_alt_break() state machine instead of rolling our own. This

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brings sio(4) in-line with zs(4) et al.
This commit is contained in:
Nate Lawson 2003-08-26 05:37:48 +00:00
parent 1809be3cd4
commit 6e433dcdea
1 changed files with 14 additions and 32 deletions
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46
sys/dev/sio/sio.c
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@ -73,6 +73,10 @@ __FBSDID("$FreeBSD$");
#include <sys/rman.h>
#include <sys/timepps.h>
#include <sys/uio.h>
#include <sys/cons.h>
#if DDB > 0
#include <ddb/ddb.h>
#endif
#include <isa/isavar.h>
@ -257,6 +261,9 @@ struct com_s {
struct timeval dcd_timestamp;
struct pps_state pps;
int pps_bit;
#ifdef ALT_BREAK_TO_DEBUGGER
int alt_brk_state;
#endif
u_long bytes_in; /* statistics */
u_long bytes_out;
@ -1786,39 +1793,19 @@ siointr1(com)
recv_data = 0;
else
recv_data = inb(com->data_port);
#if defined(DDB) && defined(ALT_BREAK_TO_DEBUGGER)
#ifdef DDB
#ifdef ALT_BREAK_TO_DEBUGGER
/*
* Solaris implements a new BREAK which is initiated
* by a character sequence CR ~ ^b which is similar
* to a familiar pattern used on Sun servers by the
* Remote Console.
*/
#define KEY_CRTLB 2 /* ^B */
#define KEY_CR 13 /* CR '\r' */
#define KEY_TILDE 126 /* ~ */
if (com->unit == comconsole) {
static int brk_state1 = 0, brk_state2 = 0;
if (recv_data == KEY_CR) {
brk_state1 = recv_data;
brk_state2 = 0;
} else if (brk_state1 == KEY_CR
&& (recv_data == KEY_TILDE
|| recv_data == KEY_CRTLB)) {
if (recv_data == KEY_TILDE)
brk_state2 = recv_data;
else if (brk_state2 == KEY_TILDE
&& recv_data == KEY_CRTLB) {
breakpoint();
brk_state1 = 0;
brk_state2 = 0;
goto cont;
} else
brk_state2 = 0;
} else
brk_state1 = 0;
}
#endif
if (com->unit == comconsole &&
db_alt_break(recv_data, &com->alt_brk_state) != 0)
breakpoint();
#endif /* ALT_BREAK_TO_DEBUGGER */
#endif /* DDB */
if (line_status & (LSR_BI | LSR_FE | LSR_PE)) {
/*
* Don't store BI if IGNBRK or FE/PE if IGNPAR.
@ -2773,8 +2760,6 @@ disc_optim(tp, t, com)
/*
* Following are all routines needed for SIO to act as console
*/
#include <sys/cons.h>
struct siocnstate {
u_char dlbl;
u_char dlbh;
@ -2809,11 +2794,8 @@ CONS_DRIVER(sio, siocnprobe, siocninit, siocnterm, siocngetc, siocncheckc,
siocnputc, NULL);
#endif
/* To get the GDB related variables */
#if DDB > 0
#include <ddb/ddb.h>
static struct consdev gdbconsdev;
#endif
static void