Add support for embedded operation withou console
The boot.c patch is applied only to teh JULIAN_HACK branch the muted console is controlable by a sysctl variable kern.consmute
This commit is contained in:
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66478c637b
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=18951
@ -36,7 +36,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)cons.c 7.2 (Berkeley) 5/9/91
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* $Id: cons.c,v 1.46 1996/05/01 03:32:46 bde Exp $
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* $Id: cons.c,v 1.47 1996/09/14 04:25:32 bde Exp $
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*/
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#include <sys/param.h>
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@ -46,6 +46,7 @@
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/reboot.h>
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#include <sys/sysctl.h>
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#include <sys/proc.h>
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#include <sys/tty.h>
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@ -88,6 +89,8 @@ struct tty *constty = 0; /* virtual console output device */
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static dev_t cn_dev_t;
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SYSCTL_OPAQUE(_machdep, CPU_CONSDEV, consdev, CTLTYPE_OPAQUE|CTLFLAG_RD,
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&cn_dev_t, sizeof cn_dev_t, "T,dev_t", "");
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static int cn_mute;
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SYSCTL_INT(_kern, KERN_CONSMUTE, consmute, CTLFLAG_RW, &cn_mute, 0, "");
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int cons_unavail = 0; /* XXX:
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* physical console not available for
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@ -120,6 +123,18 @@ cninit()
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best_cp = cp;
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}
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/*
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* Check if we should mute the console (for security reasons perhaps)
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* It can be changes dynamically using sysctl kern.consmute
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* once we are up and going.
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*
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*/
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cn_mute = ((boothowto & (RB_MUTE
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|RB_SINGLE
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|RB_VERBOSE
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|RB_ASKNAME
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|RB_CONFIG)) == RB_MUTE);
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/*
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* If no console, give up.
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*/
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@ -220,7 +235,7 @@ cnread(dev, uio, flag)
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struct uio *uio;
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int flag;
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{
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if (cn_tab == NULL)
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if ((cn_tab == NULL) || cn_mute)
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return (0);
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dev = cn_tab->cn_dev;
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return ((*cdevsw[major(dev)]->d_read)(dev, uio, flag));
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@ -232,7 +247,7 @@ cnwrite(dev, uio, flag)
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struct uio *uio;
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int flag;
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{
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if (cn_tab == NULL)
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if ((cn_tab == NULL) || cn_mute)
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return (0);
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if (constty)
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dev = constty->t_dev;
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@ -251,7 +266,7 @@ cnioctl(dev, cmd, data, flag, p)
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{
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int error;
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if (cn_tab == NULL)
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if ((cn_tab == NULL) || cn_mute)
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return (0);
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/*
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* Superuser can always use this to wrest control of console
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@ -274,7 +289,7 @@ cnselect(dev, rw, p)
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int rw;
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struct proc *p;
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{
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if (cn_tab == NULL)
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if ((cn_tab == NULL) || cn_mute)
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return (1);
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dev = cn_tab->cn_dev;
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@ -286,7 +301,7 @@ int
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cngetc()
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{
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int c;
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if (cn_tab == NULL)
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if ((cn_tab == NULL) || cn_mute)
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return (0);
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c = (*cn_tab->cn_getc)(cn_tab->cn_dev);
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if (c == '\r') c = '\n'; /* console input is always ICRNL */
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@ -296,7 +311,7 @@ cngetc()
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int
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cncheckc()
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{
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if (cn_tab == NULL)
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if ((cn_tab == NULL) || cn_mute)
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return (-1);
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return ((*cn_tab->cn_checkc)(cn_tab->cn_dev));
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}
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@ -305,7 +320,7 @@ void
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cnputc(c)
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register int c;
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{
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if (cn_tab == NULL)
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if ((cn_tab == NULL) || cn_mute)
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return;
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if (c) {
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if (c == '\n')
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@ -36,7 +36,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)cons.c 7.2 (Berkeley) 5/9/91
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* $Id: cons.c,v 1.46 1996/05/01 03:32:46 bde Exp $
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* $Id: cons.c,v 1.47 1996/09/14 04:25:32 bde Exp $
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*/
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#include <sys/param.h>
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@ -46,6 +46,7 @@
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/reboot.h>
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#include <sys/sysctl.h>
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#include <sys/proc.h>
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#include <sys/tty.h>
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@ -88,6 +89,8 @@ struct tty *constty = 0; /* virtual console output device */
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static dev_t cn_dev_t;
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SYSCTL_OPAQUE(_machdep, CPU_CONSDEV, consdev, CTLTYPE_OPAQUE|CTLFLAG_RD,
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&cn_dev_t, sizeof cn_dev_t, "T,dev_t", "");
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static int cn_mute;
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SYSCTL_INT(_kern, KERN_CONSMUTE, consmute, CTLFLAG_RW, &cn_mute, 0, "");
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int cons_unavail = 0; /* XXX:
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* physical console not available for
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@ -120,6 +123,18 @@ cninit()
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best_cp = cp;
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}
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/*
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* Check if we should mute the console (for security reasons perhaps)
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* It can be changes dynamically using sysctl kern.consmute
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* once we are up and going.
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*
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*/
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cn_mute = ((boothowto & (RB_MUTE
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|RB_SINGLE
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|RB_VERBOSE
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|RB_ASKNAME
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|RB_CONFIG)) == RB_MUTE);
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/*
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* If no console, give up.
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*/
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@ -220,7 +235,7 @@ cnread(dev, uio, flag)
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struct uio *uio;
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int flag;
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{
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if (cn_tab == NULL)
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if ((cn_tab == NULL) || cn_mute)
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return (0);
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dev = cn_tab->cn_dev;
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return ((*cdevsw[major(dev)]->d_read)(dev, uio, flag));
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@ -232,7 +247,7 @@ cnwrite(dev, uio, flag)
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struct uio *uio;
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int flag;
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{
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if (cn_tab == NULL)
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if ((cn_tab == NULL) || cn_mute)
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return (0);
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if (constty)
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dev = constty->t_dev;
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@ -251,7 +266,7 @@ cnioctl(dev, cmd, data, flag, p)
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{
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int error;
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if (cn_tab == NULL)
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if ((cn_tab == NULL) || cn_mute)
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return (0);
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/*
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* Superuser can always use this to wrest control of console
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@ -274,7 +289,7 @@ cnselect(dev, rw, p)
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int rw;
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struct proc *p;
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{
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if (cn_tab == NULL)
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if ((cn_tab == NULL) || cn_mute)
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return (1);
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dev = cn_tab->cn_dev;
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@ -286,7 +301,7 @@ int
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cngetc()
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{
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int c;
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if (cn_tab == NULL)
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if ((cn_tab == NULL) || cn_mute)
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return (0);
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c = (*cn_tab->cn_getc)(cn_tab->cn_dev);
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if (c == '\r') c = '\n'; /* console input is always ICRNL */
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@ -296,7 +311,7 @@ cngetc()
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int
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cncheckc()
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{
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if (cn_tab == NULL)
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if ((cn_tab == NULL) || cn_mute)
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return (-1);
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return ((*cn_tab->cn_checkc)(cn_tab->cn_dev));
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}
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@ -305,7 +320,7 @@ void
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cnputc(c)
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register int c;
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{
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if (cn_tab == NULL)
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if ((cn_tab == NULL) || cn_mute)
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return;
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if (c) {
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if (c == '\n')
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@ -31,7 +31,7 @@
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* SUCH DAMAGE.
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*
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* @(#)reboot.h 8.3 (Berkeley) 12/13/94
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* $Id: reboot.h,v 1.12 1996/08/22 03:50:32 julian Exp $
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* $Id: reboot.h,v 1.13 1996/08/27 19:45:58 pst Exp $
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*/
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#ifndef _SYS_REBOOT_H_
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@ -59,6 +59,8 @@
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#define RB_CDROM 0x2000 /* use cdrom as root */
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#define RB_POWEROFF 0x4000 /* if you can, turn the power off */
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#define RB_GDB 0x8000 /* use GDB remote debugger instead of DDB */
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#define RB_MUTE 0x10000 /* Come up with the console muted */
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#define RB_SELFTEST 0x20000 /* don't boot to normal operation, do selftest */
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#define RB_BOOTINFO 0x80000000 /* have `struct bootinfo *' arg */
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@ -34,7 +34,7 @@
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* SUCH DAMAGE.
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*
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* @(#)sysctl.h 8.1 (Berkeley) 6/2/93
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* $Id: sysctl.h,v 1.45 1996/09/19 00:54:29 pst Exp $
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* $Id: sysctl.h,v 1.46 1996/10/07 04:32:42 pst Exp $
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*/
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#ifndef _SYS_SYSCTL_H_
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@ -223,7 +223,8 @@ int sysctl_handle_opaque SYSCTL_HANDLER_ARGS;
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#define KERN_MAXSOCKBUF 31 /* int: max size of a socket buffer */
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#define KERN_PS_STRINGS 32 /* int: address of PS_STRINGS */
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#define KERN_USRSTACK 33 /* int: address of USRSTACK */
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#define KERN_MAXID 34 /* number of valid kern ids */
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#define KERN_CONSMUTE 34 /* Mute the console output? */
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#define KERN_MAXID 35 /* number of valid kern ids */
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#define CTL_KERN_NAMES { \
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{ 0, 0 }, \
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@ -260,6 +261,7 @@ int sysctl_handle_opaque SYSCTL_HANDLER_ARGS;
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{ "maxsockbuf", CTLTYPE_INT }, \
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{ "ps_strings", CTLTYPE_INT }, \
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{ "usrstack", CTLTYPE_INT }, \
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{ "consmute", CTLTYPE_INT }, \
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}
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/*
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