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remove obsolete startup.s modifications

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Christoph Urlacher
2026-04-22 15:41:15 +02:00
parent 6c7351b3d1
commit 5ff6f6d0d8
1 changed files with 0 additions and 52 deletions
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52
targets/startup.s
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@ -18,28 +18,6 @@
.global os_stack .global os_stack
.size os_stack, 4096 .size os_stack, 4096
# NOTE: New Start
# .section .gdt
# gdt_start:
# .quad 0x0000000000000000 # null descriptor
# .quad 0x00cf9a000000ffff # code segment descriptor: base=0, limit=4GB, 32-bit code
# .quad 0x00cf92000000ffff # data segment descriptor: base=0, limit=4GB, 32-bit data
# gdt_end:
#
# gdt_descriptor:
# .word gdt_end - gdt_start - 1 # limit
# .long gdt_start # base
#
# .section .idt
# idt_table:
# .space 256*8 # 256 entries x 8 bytes each
# idt_descriptor:
# .word 256*8-1 # limit
# .long idt_table # base
# NOTE: New End
#.Lstack_bottom: #.Lstack_bottom:
os_stack: os_stack:
.byte 0 .byte 0
@ -57,8 +35,6 @@ os_stack:
.global _start .global _start
.type _start, @function .type _start, @function
_start: _start:
# NOTE: Old Start
# Welcome to kernel mode! # Welcome to kernel mode!
# To set up a stack, we simply set the esp register to point to the top of # To set up a stack, we simply set the esp register to point to the top of
# our stack (as it grows downwards). # our stack (as it grows downwards).
@ -77,34 +53,6 @@ _start:
.Lhang: .Lhang:
jmp .Lhang jmp .Lhang
# NOTE: Old End
# NOTE: New Start
# cli
#
# lgdt gdt_descriptor # GDT
# lidt idt_descriptor # IDT Stub
#
# # set up segment registers (flat 32-bit)
# movw $0x10, %ax
# movw %ax, %ds
# movw %ax, %es
# movw %ax, %fs
# movw %ax, %gs
# movw %ax, %ss
# movl $.Lstack_top, %esp # set stack
#
# # call main C function
# call os_main
#
# cli
# hlt
# .Lhang:
# jmp .Lhang
# NOTE: New End
# Set the size of the _start symbol to the current location '.' minus its start. # Set the size of the _start symbol to the current location '.' minus its start.
# This is useful when debugging or when you implement call tracing. # This is useful when debugging or when you implement call tracing.
.size _start, . - _start .size _start, . - _start