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More coherent symbol names

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This commit is contained in:
Thomas Oltmann 2025-07-05 19:39:25 +02:00
parent 517fcba43b
commit c41288151a
1 changed files with 20 additions and 20 deletions
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40
lboot.S
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@ -27,11 +27,11 @@ _start: cli
mov $msg_getmap, %si mov $msg_getmap, %si
call print call print
call getmap call get_map
mov $msg_mkheap, %si mov $msg_mkheap, %si
call print call print
call makeheap call make_heap
mov $msg_paging, %si mov $msg_paging, %si
call print call print
@ -71,34 +71,34 @@ unreal: push %ds
mov %cr0, %eax mov %cr0, %eax
or $0x01, %al or $0x01, %al
mov %eax, %cr0 mov %eax, %cr0
ljmp $0x8, $_prot ljmp $0x8, $_urprot
_prot: mov $0x10, %cx _urprot: mov $0x10, %cx
mov %cx, %ds mov %cx, %ds
and $0xFE, %al and $0xFE, %al
mov %eax, %cr0 mov %eax, %cr0
ljmp $0x0, $_unreal ljmp $0x0, $_urunreal
_unreal: pop %ds _urunreal: pop %ds
ret ret
// getmap: Retrieve memory map using e820 BIOS function // get_map: Retrieve memory map using e820 BIOS function
getmap: mov %ds, %ax get_map: mov %ds, %ax
mov %ax, %es mov %ax, %es
mov $memmap, %di mov $memmap, %di
xor %ebx, %ebx xor %ebx, %ebx
mov $0x534D4150, %edx // e820 magic number mov $0x534D4150, %edx // e820 magic number
_nextmap: movl $0, 20(%di) _gmnext: movl $0, 20(%di)
mov $24, %ecx mov $24, %ecx
mov $0xE820, %eax mov $0xE820, %eax
int $0x15 int $0x15
jc _endmap jc _gmdone
test %ebx, %ebx test %ebx, %ebx
jz _endmap jz _gmdone
add $24, %di add $24, %di
jmp _nextmap jmp _gmnext
_endmap: add $24, %di _gmdone: add $24, %di
mov %di, memmap_end mov %di, memmap_end
ret ret
@ -132,8 +132,8 @@ _pgnext: mov %ecx, %eax
ret ret
// makeheap: find a memory range suitable for heap usage // make_heap: find a memory range suitable for heap usage
makeheap: mov $memmap-24, %si make_heap: mov $memmap-24, %si
_mhnext: add $24, %si _mhnext: add $24, %si
cmp memmap_end, %si cmp memmap_end, %si
jae _mhdone jae _mhdone
@ -193,23 +193,23 @@ _aerr: mov $msg_aerr, %si
// print: print NUL-terminated string pointed to by SI // print: print NUL-terminated string pointed to by SI
print: xor %bx, %bx print: xor %bx, %bx
_nextchr: mov $COM1+5, %dx _prnext: mov $COM1+5, %dx
inb %dx, %al inb %dx, %al
test $0x20, %al test $0x20, %al
jz _nextchr jz _prnext
lodsb lodsb
or %al, %al or %al, %al
jz _endprint jz _prdone
mov $COM1, %dx mov $COM1, %dx
outb %al, %dx outb %al, %dx
mov $0x0E, %ah mov $0x0E, %ah
int $0x10 int $0x10
jmp _nextchr jmp _prnext
_endprint: ret _prdone: ret
// gdt: Protected mode / Unreal mode 16-bit GDT // gdt: Protected mode / Unreal mode 16-bit GDT
gdt: // entry 0: null descriptor gdt: // entry 0: null descriptor