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| author | Lizzy Fleckenstein <eliasfleckenstein@web.de> | 2023-12-07 15:33:24 +0100 |
|---|---|---|
| committer | Lizzy Fleckenstein <eliasfleckenstein@web.de> | 2023-12-07 15:33:24 +0100 |
| commit | 85cc696ea5120982072cd5d3ef7dfd757088a7e9 (patch) | |
| tree | 004d47f5ecd7189cd4fdb462cf638ebd4bf865c6 /stage1/main.asm | |
| parent | 5f05ff8f7bc41bfeed0887f224d43d3abf0d5c75 (diff) | |
| download | cuddles-85cc696ea5120982072cd5d3ef7dfd757088a7e9.tar.xz | |
ensure stack doesn't overwrite MBR during stage1
Diffstat (limited to 'stage1/main.asm')
| -rw-r--r-- | stage1/main.asm | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/stage1/main.asm b/stage1/main.asm index ce4ead4..f14c1f0 100644 --- a/stage1/main.asm +++ b/stage1/main.asm @@ -13,7 +13,7 @@ boot: mov ss, ax ; init stack - mov bp, KSTART ; stack grows down, overwriting MBR + mov bp, 0x7C00 mov sp, bp ; print message @@ -30,6 +30,10 @@ boot: ; load stage2 and stage3 call load_stages + ; reclaim MBR space for stack + mov bp, KSTART + mov sp, bp + ; jump into stage2 jmp KSTART |