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/* ----------------------------------------------------------------------- *
*
* Copyright 2013 H. Peter Anvin - All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall
* be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* ----------------------------------------------------------------------- */
#include "v9fs.h"
.code16
.section ".text","ax"
/* ------------------------------------------------------------------------- *
* puterr
*
* Print a message (pointer on the stack) on standard error, prefixed by
* "v9fs: "
* ------------------------------------------------------------------------- */
.globl puterr
puterr:
printmsg "v9fs: "
/* Fall through */
.size puterr,.-puterr
.type puterr,@function
/* ------------------------------------------------------------------------- *
* puts
*
* Print a message (pointer on the stack) on standard error.
* ------------------------------------------------------------------------- */
.globl puts
puts:
pushaw
movw %sp,%bp
movw 18(%bp),%di
movw %di,%dx
xorb %al,%al
movw %di,%cx
notw %cx
cld
repne scasb
/* Now %di points to the byte *after* the terminating null */
leaw -1(%di),%cx
subw %dx,%cx
movw $2,%bx /* 2 = stderr */
movb $0x40,%ah
1:
jcxz 2f
int $0x21
jc 2f
subw %ax,%cx
jmp 1b
2:
popaw
retw $2
.size puts,.-puts
.type puts,@function
/* ------------------------------------------------------------------------- *
* printnum
*
* Print an unsigned 32-bit integer on the stack
* ------------------------------------------------------------------------- */
.globl printnum
printnum:
pushl %eax
pushl %edx
pushl %ecx
pushw %di
movw %sp,%di
movl (2+1*2+3*4)(%di),%eax
subw $12,%sp
decw %di
xorl %ecx,%ecx
movb %cl,(%di)
movb $10,%cl
1:
xorl %edx,%edx
divl %ecx
decw %di
addb $0x30,%dl
movb %dl,(%di)
andl %eax,%eax
jnz 1b
pushw %di
call puts
addw $12,%sp
popw %di
popl %ecx
popl %edx
popl %eax
retw $4
.size printnum,.-printnum
.type printnum,@function
/* ------------------------------------------------------------------------- *
* printhex4
*
* Print an hexadecimal 4-digit number from the stack
* ------------------------------------------------------------------------- */
.globl printhex4
printhex4:
pushw %ax
pushw %cx
pushw %dx
pushw %di
cld
subw $6,%sp
movw %sp,%di
movw (2+4*2+6)(%di),%dx
movw $4,%cx
1:
rolw $4,%dx
movb %dl,%al
andb $0x0f,%al
addb $0x30,%al
cmpb $0x3a,%al
jb 2f
addb $(0x41-0x3a),%al
2:
stosb
loopw 1b
movb %cl,(%di) /* %cl == 0 */
pushw %sp /* %sp -> address of buffer */
call puts
addw $6,%sp
popw %di
popw %dx
popw %cx
popw %ax
retw $2
.size printhex4,.-printhex4
.type printhex4,@function
/* ------------------------------------------------------------------------- *
* printhex8
*
* Print an hexadecimal 8-digit number from the stack
* ------------------------------------------------------------------------- */
.globl printhex8
printhex8:
pushw %bp
movw %sp,%bp
pushw 6(%bp)
call printhex4
pushw 4(%bp)
call printhex4
popw %bp
retw $4
.size printhex8,.-printhex8
.type printhex8,@function
/* ------------------------------------------------------------------------- *
* crlf
*
* Print a newline
* ------------------------------------------------------------------------- */
.globl crlf
crlf:
printmsg "\r\n"
retw
.size crlf,.-crlf
.type crlf,@function
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