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🎉 simple allocator init in the code

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Elaina Claus
2025-09-05 16:48:24 -04:00
parent cd316afdd1
commit b0bd4b27b0
2 changed files with 5 additions and 2 deletions
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3
include/util/arena_alloc.nasm
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@@ -18,12 +18,13 @@ arena_init:
mov di, ax mov di, ax
xor eax, eax xor eax, eax
mov word [di + ArenaStateStruc_t.mark], eax mov word [di + ArenaStateStruc_t.mark], ax
mov word [di + ArenaStateStruc_t.end], word (__ARENA_HEAP_START + __ARENA_HEAP_SIZE) mov word [di + ArenaStateStruc_t.end], word (__ARENA_HEAP_START + __ARENA_HEAP_SIZE)
mov word [di + ArenaStateStruc_t.start], __ARENA_HEAP_START mov word [di + ArenaStateStruc_t.start], __ARENA_HEAP_START
; zero out heap area on init ; zero out heap area on init
; void* kmemset_byte(void* dst, uint8_t val, uint16_t len); ; void* kmemset_byte(void* dst, uint8_t val, uint16_t len);
; TODO: use word or qword spacing at least to speed this up
mov ax, __ARENA_HEAP_SIZE mov ax, __ARENA_HEAP_SIZE
push ax ; len push ax ; len
xor ax, ax xor ax, ax

4
src/stage2/stage2.nasm
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@@ -158,8 +158,10 @@ main:
print_string HelloPrompt_info print_string HelloPrompt_info
; setup the early heap ; setup the early heap
push area mov ax, early_heap_state
push ax ; address in bss of state structure
call arena_init call arena_init
add sp, 0x2
; enable A20 gate ; enable A20 gate
call EnableA20 call EnableA20