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| author | Kartik K. Agaram <vc@akkartik.com> | 2021-04-25 21:21:18 -0700 |
|---|---|---|
| committer | Kartik K. Agaram <vc@akkartik.com> | 2021-04-25 21:29:42 -0700 |
| commit | 3b1f23f5d72eebd9e4b33d6475075555d12a00c3 (patch) | |
| tree | f2b342f05078c37c2d1cad363ff3f47cbb852f55 /boot.subx | |
| parent | 6bb70a236c759d3d85265de068cde6d26a747d3b (diff) | |
| download | mu-3b1f23f5d72eebd9e4b33d6475075555d12a00c3.tar.gz | |
expand stack to 16MB
It's also no longer contiguous with code.
Diffstat (limited to 'boot.subx')
| -rw-r--r-- | boot.subx | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/boot.subx b/boot.subx index 7b355ff6..7ded7309 100644 --- a/boot.subx +++ b/boot.subx @@ -16,8 +16,8 @@ # Memory map of a Mu computer: # code: currently 4 tracks loaded from the primary disk to [0x00007c00, 0x00048600) -# stack: grows down from 0x00070000 -# heap: [0x01000000, 0x08000000) +# stack: grows down from 0x02000000 to 0x01000000 +# heap: [0x02000000, 0x08000000) # see 120allocate.subx; Qemu initializes with 128MB RAM by default # Consult https://wiki.osdev.org/Memory_Map_(x86) before modifying any of # this. And don't forget to keep *stack-debug.subx in sync. @@ -41,7 +41,7 @@ 8e/->seg 3/mod/direct 0/rm32/ax 4/r32/fs 8e/->seg 3/mod/direct 0/rm32/ax 5/r32/gs - # initialize stack to 0x00070000 + # Temporarily initialize stack to 0x00070000 in real mode. # We don't read or write the stack before we get to 32-bit mode, but BIOS # calls do. We need to move the stack in case BIOS initializes it to some # low address that we want to write code into. @@ -209,7 +209,7 @@ initialize_32bit_mode: 8e/->seg 3/mod/direct 0/rm32/ax 4/r32/fs 8e/->seg 3/mod/direct 0/rm32/ax 5/r32/gs - bc/copy-to-esp 0x00070000/imm32 + bc/copy-to-esp 0x02000000/imm32 ## load interrupt handlers # We can't refer to the label directly because SubX doesn't do the right |