iDunnoDev/xv6-custom-os
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Added buffer to the console

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Added hotkeys to switch between console buffers and to return to the home one
Added clear screen command
Added debug text outputs to the hello command and when loading sh
This commit is contained in:
iDunnoDev
2022-12-09 10:39:55 +00:00
committed by iDunnoDev
parent 0ee33aaa97
commit 9b23ca2a45
194 changed files with 283 additions and 49519 deletions
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115
entryother.asm
View File

@ -1,115 +0,0 @@
bootblockother.o: file format elf32-i386
Disassembly of section .text:
00007000 <start>:
# This code combines elements of bootasm.S and entry.S.
.code16
.globl start
start:
cli
7000: fa cli
# Zero data segment registers DS, ES, and SS.
xorw %ax,%ax
7001: 31 c0 xor %eax,%eax
movw %ax,%ds
7003: 8e d8 mov %eax,%ds
movw %ax,%es
7005: 8e c0 mov %eax,%es
movw %ax,%ss
7007: 8e d0 mov %eax,%ss
# Switch from real to protected mode. Use a bootstrap GDT that makes
# virtual addresses map directly to physical addresses so that the
# effective memory map doesn't change during the transition.
lgdt gdtdesc
7009: 0f 01 16 lgdtl (%esi)
700c: 74 70 je 707e <_end+0x2>
movl %cr0, %eax
700e: 0f 20 c0 mov %cr0,%eax
orl $CR0_PE, %eax
7011: 66 83 c8 01 or $0x1,%ax
movl %eax, %cr0
7015: 0f 22 c0 mov %eax,%cr0
# Complete the transition to 32-bit protected mode by using a long jmp
# to reload %cs and %eip. The segment descriptors are set up with no
# translation, so that the mapping is still the identity mapping.
ljmpl $(SEG_KCODE<<3), $(start32)
7018: 66 ea 20 70 00 00 ljmpw $0x0,$0x7020
701e: 08 00 or %al,(%eax)
00007020 <start32>:
.code32 # Tell assembler to generate 32-bit code now.
start32:
# Set up the protected-mode data segment registers
movw $(SEG_KDATA<<3), %ax # Our data segment selector
7020: 66 b8 10 00 mov $0x10,%ax
movw %ax, %ds # -> DS: Data Segment
7024: 8e d8 mov %eax,%ds
movw %ax, %es # -> ES: Extra Segment
7026: 8e c0 mov %eax,%es
movw %ax, %ss # -> SS: Stack Segment
7028: 8e d0 mov %eax,%ss
movw $0, %ax # Zero segments not ready for use
702a: 66 b8 00 00 mov $0x0,%ax
movw %ax, %fs # -> FS
702e: 8e e0 mov %eax,%fs
movw %ax, %gs # -> GS
7030: 8e e8 mov %eax,%gs
# Turn on page size extension for 4Mbyte pages
movl %cr4, %eax
7032: 0f 20 e0 mov %cr4,%eax
orl $(CR4_PSE), %eax
7035: 83 c8 10 or $0x10,%eax
movl %eax, %cr4
7038: 0f 22 e0 mov %eax,%cr4
# Use entrypgdir as our initial page table
movl (start-12), %eax
703b: a1 f4 6f 00 00 mov 0x6ff4,%eax
movl %eax, %cr3
7040: 0f 22 d8 mov %eax,%cr3
# Turn on paging.
movl %cr0, %eax
7043: 0f 20 c0 mov %cr0,%eax
orl $(CR0_PE|CR0_PG|CR0_WP), %eax
7046: 0d 01 00 01 80 or $0x80010001,%eax
movl %eax, %cr0
704b: 0f 22 c0 mov %eax,%cr0
# Switch to the stack allocated by startothers()
movl (start-4), %esp
704e: 8b 25 fc 6f 00 00 mov 0x6ffc,%esp
# Call mpenter()
call *(start-8)
7054: ff 15 f8 6f 00 00 call *0x6ff8
0000705a <spin>:
# We should never return.
spin:
jmp spin
705a: eb fe jmp 705a <spin>
0000705c <gdt>:
...
7064: ff (bad)
7065: ff 00 incl (%eax)
7067: 00 00 add %al,(%eax)
7069: 9a cf 00 ff ff 00 00 lcall $0x0,$0xffff00cf
7070: 00 .byte 0x0
7071: 92 xchg %eax,%edx
7072: cf iret
...
00007074 <gdtdesc>:
7074: 17 pop %ss
7075: 00 5c 70 00 add %bl,0x0(%eax,%esi,2)
...