Author: tsoome
Date: Tue Jun 16 20:35:00 2020
New Revision: 362239
URL: https://svnweb.freebsd.org/changeset/base/362239
Log:
boot2: need to expand tab output and mask getchar
The BIOS ouput char function does not expand tab.
Mask getchar with 0xFF.
Sponsored by: Netflix, Klara Inc.
Modified:
head/stand/i386/common/cons.c
Modified: head/stand/i386/common/cons.c
==============================================================================
--- head/stand/i386/common/cons.c Tue Jun 16 20:23:57 2020
(r362238)
+++ head/stand/i386/common/cons.c Tue Jun 16 20:35:00 2020
(r362239)
@@ -53,12 +53,38 @@ xputc(int c)
sio_putc(c);
}
+static void
+getcursor(int *row, int *col)
+{
+ v86.ctl = V86_FLAGS;
+ v86.addr = 0x10;
+ v86.eax = 0x300;
+ v86.ebx = 0x7;
+ v86int();
+
+ if (row != NULL)
+ *row = v86.edx >> 8;
+ if (col != NULL)
+ *col = v86.edx & 0xff;
+}
+
void
putchar(int c)
{
+ int i, col;
- if (c == '\n')
+ switch (c) {
+ case '\n':
xputc('\r');
+ break;
+ case '\t':
+ col = 0;
+ getcursor(NULL, &col);
+ col = 8 - (col % 8);
+ for (i = 0; i < col; i++)
+ xputc(' ');
+ return;
+ }
xputc(c);
}
@@ -100,7 +126,7 @@ int
getchar(void)
{
- return (xgetc(0));
+ return (xgetc(0) & 0xff);
}
int
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