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mirror of https://git.FreeBSD.org/src.git synced 2024-12-14 10:09:48 +00:00
freebsd/stand/i386/common/cons.c
Warner Losh 6562843997 Remove the 'mini libstand in libstand' that util.[ch] provided. These
weren't needed, and their existance interfered with things in subtle
ways. One of these subtle ways was that malloc could be different
based on what files were included when (even within the same .c file,
it turns out). Move to a single malloc implementation as well by
adding the calls to setheap() to gptboot.c and zfsboot.c. Once upon a
time, these boot loaders strove to not use libstand. However, with the
proliferation of features, that striving is too hard for too little
gain and lead to stupid mistakes.

This fixes the GELI-enabled (but not even using) boot environment. The
geli routines were calling libstand malloc but zfsboot.c and gptboot.c
were using the mini libstand malloc, so this failed when we tried to
probe for GELI partitions. Subtle changes in build order when moving
to self-contained stand build in r326593 toggled what it used from one
type to another due to odd nesting of the zfs implementation code that
differed subtly between zfsloader and zfsboot.

Sponsored by: Netflix
2017-12-15 23:16:53 +00:00

179 lines
2.7 KiB
C

/*-
* Copyright (c) 1998 Robert Nordier
* All rights reserved.
*
* Redistribution and use in source and binary forms are freely
* permitted provided that the above copyright notice and this
* paragraph and the following disclaimer are duplicated in all
* such forms.
*
* This software is provided "AS IS" and without any express or
* implied warranties, including, without limitation, the implied
* warranties of merchantability and fitness for a particular
* purpose.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <machine/psl.h>
#include <btxv86.h>
#include "stand.h"
#include "lib.h"
#include "rbx.h"
#include "cons.h"
#define SECOND 18 /* Circa that many ticks in a second. */
uint8_t ioctrl = IO_KEYBOARD;
void
putc(int c)
{
v86.ctl = V86_FLAGS;
v86.addr = 0x10;
v86.eax = 0xe00 | (c & 0xff);
v86.ebx = 0x7;
v86int();
}
void
xputc(int c)
{
if (ioctrl & IO_KEYBOARD)
putc(c);
if (ioctrl & IO_SERIAL)
sio_putc(c);
}
void
putchar(int c)
{
if (c == '\n')
xputc('\r');
xputc(c);
}
int
getc(int fn)
{
v86.ctl = V86_FLAGS;
v86.addr = 0x16;
v86.eax = fn << 8;
v86int();
if (fn == 0)
return (v86.eax);
if (V86_ZR(v86.efl))
return (0);
return (v86.eax);
}
int
xgetc(int fn)
{
if (OPT_CHECK(RBX_NOINTR))
return (0);
for (;;) {
if (ioctrl & IO_KEYBOARD && getc(1))
return (fn ? 1 : getc(0));
if (ioctrl & IO_SERIAL && sio_ischar())
return (fn ? 1 : sio_getc());
if (fn)
return (0);
}
/* NOTREACHED */
}
int
getchar(void)
{
return (xgetc(0));
}
int
keyhit(unsigned int secs)
{
uint32_t t0, t1, c;
if (OPT_CHECK(RBX_NOINTR))
return (0);
secs *= SECOND;
t0 = 0;
for (;;) {
/*
* The extra comparison is an attempt to work around
* what appears to be a bug in QEMU and Bochs. Both emulators
* sometimes report a key-press with scancode one and ascii zero
* when no such key is pressed in reality. As far as I can tell,
* this only happens shortly after a reboot.
*/
c = xgetc(1);
if (c != 0 && c != 0x0100)
return (1);
if (secs > 0) {
t1 = *(uint32_t *)PTOV(0x46c);
if (!t0)
t0 = t1;
if (t1 < t0 || t1 >= t0 + secs)
return (0);
}
}
/* NOTREACHED */
}
void
getstr(char *cmdstr, size_t cmdstrsize)
{
char *s;
int c;
s = cmdstr;
for (;;) {
c = xgetc(0);
/* Translate some extended codes. */
switch (c) {
case 0x5300: /* delete */
c = '\177';
break;
default:
c &= 0xff;
break;
}
switch (c) {
case '\177':
case '\b':
if (s > cmdstr) {
s--;
printf("\b \b");
}
break;
case '\n':
case '\r':
*s = 0;
return;
default:
if (c >= 0x20 && c <= 0x7e) {
if (s - cmdstr < cmdstrsize - 1)
*s++ = c;
putchar(c);
}
break;
}
}
}