diff options
Diffstat (limited to 'bootother.S')
| -rw-r--r-- | bootother.S | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/bootother.S b/bootother.S index 39b284d..cb3ff4c 100644 --- a/bootother.S +++ b/bootother.S @@ -61,7 +61,17 @@ protcseg: movl start-4, %esp movl start-8, %eax - jmp *%eax + call *%eax + + # If bootmain returns (it shouldn't), trigger a Bochs + # breakpoint if running under Bochs, then loop. + movw $0x8a00, %ax # 0x8a00 -> port 0x8a00 + movw %ax, %dx + outw %ax, %dx + movw $0x8e00, %ax # 0x8e00 -> port 0x8a00 + outw %ax, %dx +spin: + jmp spin # Bootstrap GDT .p2align 2 # force 4 byte alignment |