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| author | Alexis211 <alexis211@gmail.com> | 2010-02-03 15:22:30 +0100 |
|---|---|---|
| committer | Alexis211 <alexis211@gmail.com> | 2010-02-03 15:22:30 +0100 |
| commit | 9c4310651a91e64c10a17f3190c895a49096aeb1 (patch) | |
| tree | af87d115512249458f80f184d53db403c3f0bb0f /src/stem/loader_.asm | |
| parent | 7f72a900c12ba62db12df0872cb66f79a27aa9d9 (diff) | |
| download | TCE-9c4310651a91e64c10a17f3190c895a49096aeb1.tar.gz TCE-9c4310651a91e64c10a17f3190c895a49096aeb1.zip | |
Reogranization
Diffstat (limited to 'src/stem/loader_.asm')
| -rw-r--r-- | src/stem/loader_.asm | 63 |
1 files changed, 0 insertions, 63 deletions
diff --git a/src/stem/loader_.asm b/src/stem/loader_.asm deleted file mode 100644 index e1031b4..0000000 --- a/src/stem/loader_.asm +++ /dev/null @@ -1,63 +0,0 @@ -[GLOBAL loader] ; making entry point visible to linker -[EXTERN kmain] ; kmain is defined in kmain.c - -STACKSIZE equ 0x4000 ; that's 16k. - -; setting up the Multiboot header - see GRUB docs for details -MODULEALIGN equ 1<<0 ; align loaded modules on page boundaries -MEMINFO equ 1<<1 ; provide memory map -FLAGS equ MODULEALIGN | MEMINFO ; this is the Multiboot 'flag' field -MAGIC equ 0x1BADB002 ; 'magic number' lets bootloader find the header -CHECKSUM equ -(MAGIC + FLAGS) ; checksum required - -section .text -align 4 -MultiBootHeader: - dd MAGIC - dd FLAGS - dd CHECKSUM - -section .setup -loader: ;here, we load our false GDT, used for having the kernel in higher half - lgdt [trickgdt] - mov cx, 0x10; - mov ds, cx; - mov es, cx; - mov fs, cx; - mov gs, cx; - mov ss, cx; - - jmp 0x08:higherhalf - -section .text -higherhalf: ; now we're running in higher half - - mov esp, stack+STACKSIZE ; set up the stack - push eax ; pass Multiboot magic number - add ebx, 0xE0000000 ; update the MB info structure so that it is in the new seg - push ebx ; pass Multiboot info structure - - call kmain ; call kernel proper - - cli ; disable interupts -hang: - hlt ; halt machine should kernel return - jmp hang - -[section .setup] ; this is included in the .setup section, so that it thinks it is at 0x00100000 - -trickgdt: ; our false GDT - dw gdt_end - gdt - 1 ; gdt limit - dd gdt ; gdt base - -gdt: - dd 0, 0 ; null GDT entry - db 0xFF, 0xFF, 0, 0, 0, 10011010b, 11001111b, 0x20 ; kernel code segment - db 0xFF, 0xFF, 0, 0, 0, 10010010b, 11001111b, 0x20 ; kernel data segment - -gdt_end: - -[section .bss] -align 32 -stack: - resb STACKSIZE ; reserve 16k stack on a quadword boundary |