| #define ASM_FILE 1 |
| #ifdef TARGET_MULTIBOOT2 |
| #include <multiboot2.h> |
| #elif defined (TARGET_MULTIBOOT) |
| #include <multiboot.h> |
| #endif |
| |
| .text |
| /* Align 32 bits boundary. */ |
| .align 8 |
| |
| #ifdef TARGET_MULTIBOOT2 |
| /* Multiboot header. */ |
| multiboot_header: |
| /* magic */ |
| .long MULTIBOOT2_HEADER_MAGIC |
| /* ISA: i386 */ |
| .long MULTIBOOT_ARCHITECTURE_I386 |
| /* Header length. */ |
| .long multiboot_header_end - multiboot_header |
| /* checksum */ |
| .long -(MULTIBOOT2_HEADER_MAGIC + MULTIBOOT_ARCHITECTURE_I386 + (multiboot_header_end - multiboot_header)) |
| .short MULTIBOOT_HEADER_TAG_END |
| .short 0 |
| .long 8 |
| multiboot_header_end: |
| #elif defined (TARGET_MULTIBOOT) |
| /* Multiboot header. */ |
| multiboot_header: |
| /* magic */ |
| .long MULTIBOOT_HEADER_MAGIC |
| /* flags */ |
| .long 0 |
| /* checksum */ |
| .long -MULTIBOOT_HEADER_MAGIC |
| #endif |
| |
| .global start |
| |
| serialmsg: |
| 1: |
| movb 0(%esi), %bl |
| testb %bl, %bl |
| jz 1f |
| movw $0x3fd, %dx |
| 2: |
| inb %dx, %al |
| testb $0x20, %al |
| jz 2b |
| |
| movw $0x3f8, %dx |
| movb %bl, %al |
| outb %al, %dx |
| incl %esi |
| jmp 1b |
| 1: |
| ret |
| |
| .globl _start |
| _start: |
| lea message, %esi |
| call serialmsg |
| |
| #include "qemu-shutdown-x86.S" |
| |
| 1: |
| hlt |
| jmp 1b |
| |
| message: |
| .ascii "Boot Test Passed Successfully\n" SUCCESSFUL_BOOT_STRING "\n" |
| .byte 0 |
