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| author | user <user@clank> | 2026-07-15 23:54:13 +0200 |
|---|---|---|
| committer | user <user@clank> | 2026-07-15 23:54:13 +0200 |
| commit | ab3ebbe227c72b745a46f9233fbfbb27477586b8 (patch) | |
| tree | d71f87605d17c5653f34ebcdef3941f898cd5b91 /src/syscall.asm | |
| parent | gbos scaffold: working cooperative microkernel (verified ABAB in emulator) (diff) | |
| download | gbos-ab3ebbe227c72b745a46f9233fbfbb27477586b8.tar.gz gbos-ab3ebbe227c72b745a46f9233fbfbb27477586b8.tar.xz gbos-ab3ebbe227c72b745a46f9233fbfbb27477586b8.zip | |
kernel: implement fork()
- sys_fork: switch to a kernel stack, bump-allocate a cart-RAM bank, copy the
parent's 8 KiB bank via a WRAM bounce buffer, plant a switch-in frame so the
child returns 0 to the post-fork PC, fill the child PCB (shared ROM text)
- add AllocRamBank (bump allocator) + FindFreeSlot helpers
- demo: init forks; parent prints P, child prints C (PCPC...); nested fork
gives three distinct pids (123...)
- README: document the fork mechanism, mark syscall status
Diffstat (limited to 'src/syscall.asm')
| -rw-r--r-- | src/syscall.asm | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/syscall.asm b/src/syscall.asm index 71e1f2b..ca2857c 100644 --- a/src/syscall.asm +++ b/src/syscall.asm @@ -35,7 +35,7 @@ SyscallTrap:: ; ----------------------------------------------------------------------------- SyscallTable: dw sys_exit ; 0 - dw sys_nosys ; 1 FORK (TODO) + dw sys_fork ; 1 FORK dw sys_nosys ; 2 READ (TODO) dw sys_write ; 3 WRITE dw sys_nosys ; 4 OPEN (TODO) |