| 1 | .code16 |
| 2 | .globl code16_start |
| 3 | .globl code16_end |
| 4 | |
| 5 | CS_SEG = 0xf |
| 6 | |
| 7 | code16_start: |
| 8 | |
| 9 | .globl code16_func1 |
| 10 | |
| 11 | /* basic test */ |
| 12 | code16_func1 = . - code16_start |
| 13 | mov $1, %eax |
| 14 | data32 lret |
| 15 | |
| 16 | /* test push/pop in 16 bit mode */ |
| 17 | .globl code16_func2 |
| 18 | code16_func2 = . - code16_start |
| 19 | xor %eax, %eax |
| 20 | mov $0x12345678, %ebx |
| 21 | movl %esp, %ecx |
| 22 | push %bx |
| 23 | subl %esp, %ecx |
| 24 | pop %ax |
| 25 | data32 lret |
| 26 | |
| 27 | /* test various jmp opcodes */ |
| 28 | .globl code16_func3 |
| 29 | code16_func3 = . - code16_start |
| 30 | jmp 1f |
| 31 | nop |
| 32 | 1: |
| 33 | mov $4, %eax |
| 34 | mov $0x12345678, %ebx |
| 35 | xor %bx, %bx |
| 36 | jz 2f |
| 37 | add $2, %ax |
| 38 | 2: |
| 39 | |
| 40 | call myfunc |
| 41 | |
| 42 | lcall $CS_SEG, $(myfunc2 - code16_start) |
| 43 | |
| 44 | ljmp $CS_SEG, $(myjmp1 - code16_start) |
| 45 | myjmp1_next: |
| 46 | |
| 47 | cs lcall *myfunc2_addr - code16_start |
| 48 | |
| 49 | cs ljmp *myjmp2_addr - code16_start |
| 50 | myjmp2_next: |
| 51 | |
| 52 | data32 lret |
| 53 | |
| 54 | myfunc2_addr: |
| 55 | .short myfunc2 - code16_start |
| 56 | .short CS_SEG |
| 57 | |
| 58 | myjmp2_addr: |
| 59 | .short myjmp2 - code16_start |
| 60 | .short CS_SEG |
| 61 | |
| 62 | myjmp1: |
| 63 | add $8, %ax |
| 64 | jmp myjmp1_next |
| 65 | |
| 66 | myjmp2: |
| 67 | add $16, %ax |
| 68 | jmp myjmp2_next |
| 69 | |
| 70 | myfunc: |
| 71 | add $1, %ax |
| 72 | ret |
| 73 | |
| 74 | myfunc2: |
| 75 | add $4, %ax |
| 76 | lret |
| 77 | |
| 78 | |
| 79 | code16_end: |