projects / qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 3a27ad0b FB |
1 | .code16 |
| 2 | .globl vm86_code_start | |
| 3 | .globl vm86_code_end | |
| 4 | ||
| 5 | #define GET_OFFSET(x) ((x) - vm86_code_start + 0x100) | |
| 6 | ||
| 7 | vm86_code_start: | |
| 8 | movw $GET_OFFSET(hello_world), %dx | |
| 9 | movb $0x09, %ah | |
| 10 | int $0x21 | |
| 11 | ||
| 12 | /* prepare int 0x90 vector */ | |
| 13 | xorw %ax, %ax | |
| 14 | movw %ax, %es | |
| 15 | es movw $GET_OFFSET(int90_test), 0x90 * 4 | |
| 16 | es movw %cs, 0x90 * 4 + 2 | |
| 17 | ||
| 18 | /* launch int 0x90 */ | |
| 19 | ||
| 20 | int $0x90 | |
| 21 | ||
| 22 | /* test IF support */ | |
| 23 | movw $GET_OFFSET(IF_msg), %dx | |
| 24 | movb $0x09, %ah | |
| 25 | int $0x21 | |
| 26 | ||
| 27 | pushf | |
| 28 | popw %dx | |
| 29 | movb $0xff, %ah | |
| 30 | int $0x21 | |
| 31 | ||
| 32 | cli | |
| 33 | pushf | |
| 34 | popw %dx | |
| 35 | movb $0xff, %ah | |
| 36 | int $0x21 | |
| 37 | ||
| 38 | sti | |
| 39 | pushfl | |
| 40 | popl %edx | |
| 41 | movb $0xff, %ah | |
| 42 | int $0x21 | |
| 43 | ||
| 44 | #if 0 | |
| 45 | movw $GET_OFFSET(IF_msg1), %dx | |
| 46 | movb $0x09, %ah | |
| 47 | int $0x21 | |
| 48 | ||
| 49 | pushf | |
| 50 | movw %sp, %bx | |
| 51 | andw $~0x200, (%bx) | |
| 52 | popf | |
| 53 | #else | |
| 54 | cli | |
| 55 | #endif | |
| 56 | ||
| 57 | pushf | |
| 58 | popw %dx | |
| 59 | movb $0xff, %ah | |
| 60 | int $0x21 | |
| 61 | ||
| 62 | pushfl | |
| 63 | movw %sp, %bx | |
| 64 | orw $0x200, (%bx) | |
| 65 | popfl | |
| 66 | ||
| 67 | pushfl | |
| 68 | popl %edx | |
| 69 | movb $0xff, %ah | |
| 70 | int $0x21 | |
| 71 | ||
| 72 | movb $0x00, %ah | |
| 73 | int $0x21 | |
| 74 | ||
| 75 | int90_test: | |
| 76 | pushf | |
| 77 | pop %dx | |
| 78 | movb $0xff, %ah | |
| 79 | int $0x21 | |
| 80 | ||
| 81 | movw %sp, %bx | |
| 82 | movw 4(%bx), %dx | |
| 83 | movb $0xff, %ah | |
| 84 | int $0x21 | |
| 85 | ||
| 86 | movw $GET_OFFSET(int90_msg), %dx | |
| 87 | movb $0x09, %ah | |
| 88 | int $0x21 | |
| 89 | iret | |
| 90 | ||
| 91 | int90_msg: | |
| 92 | .string "INT90 started\n$" | |
| 93 | ||
| 94 | hello_world: | |
| 95 | .string "Hello VM86 world\n$" | |
| 96 | ||
| 97 | IF_msg: | |
| 98 | .string "VM86 IF test\n$" | |
| 99 | ||
| 100 | IF_msg1: | |
| 101 | .string "If you see a diff here, your Linux kernel is buggy, please update to 2.4.20 kernel\n$" | |
| 102 | ||
| 103 | vm86_code_end: | |
| 104 |