95 lines
3.0 KiB
ArmAsm
95 lines
3.0 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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.code16
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.section .start,"ax",@progbits
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_start: jmp 1f
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1: ljmp $0x600>>4,$_begin
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_begin: push %cs
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pop %ds
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push %cs
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pop %es
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mov $0x70000>>4,%ax
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cli
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mov %ax,%ss
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xor %sp,%sp
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sti
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cld
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xor %ax,%ax
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xor %di,%di
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mov $0x7c00-0x600,%cx
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rep stosb
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xchg %di,%bx
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inc %cx
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xor %dh,%dh
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mov $v_sectors+0x0200,%ax
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int $0x13
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xor %bp,%bp
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sub $6,%sp
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call main
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nop
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.type _start,@function
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.size _start,.-_start
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.globl _start
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.globl v_sectors
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.globl main
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setjmp: mov %sp,%ax
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stosw # sp
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xchg %ax,%si
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movsw %ss:(%si),(%di) # ip
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mov %bp,%ax
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stosw # bp
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ret
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.type setjmp,@function
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.size setjmp,.-setjmp
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.globl setjmp
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longjmp:
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mov (%di),%sp
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mov 2(%di),%dx
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mov 4(%di),%bp
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pop %ax
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mov %si,%ax
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jmp *%dx
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.type longjmp,@function
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.size longjmp,.-longjmp
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.globl longjmp
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.globl q.syntax
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.type q.syntax,@function
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.globl q.look
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.type q.look,@function
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.globl q.globals
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.type q.globals,@function
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.globl q.index
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.type q.index,@function
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.globl q.token
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.type q.token,@function
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.globl q.str
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.type q.str,@function
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.globl boot
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.type boot,@function
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.globl bss
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.type bss,@function
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.globl rodata
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.type rodata,@function
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