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| 1 | sys_exit equ 1 | |
| 2 | sys_read equ 3 | |
| 3 | sys_write equ 4 | |
| 4 | sys_open equ 5 | |
| 5 | sys_close equ 6 | |
| 6 | sys_brk equ 45 | |
| 7 | sys_newstat equ 106 | |
| 8 | ||
| 9 | O_RDONLY equ 0 | |
| 10 | O_WRONLY equ 1 | |
| 11 | O_RDWR equ 2 | |
| 12 | ||
| 13 | stdin equ 0 | |
| 14 | stdout equ 1 | |
| 15 | stderr equ 2 | |
| 16 | ||
| 17 | struc STAT | |
| 18 | .st_dev: resd 1 | |
| 19 | .st_ino: resd 1 | |
| 20 | .st_mode: resw 1 | |
| 21 | .st_nlink: resw 1 | |
| 22 | .st_uid: resw 1 | |
| 23 | .st_gid: resw 1 | |
| 24 | .st_rdev: resd 1 | |
| 25 | .st_size: resd 1 | |
| 26 | .st_blksize: resd 1 | |
| 27 | .st_blocks: resd 1 | |
| 28 | .st_atime: resd 1 | |
| 29 | .st_atime_nsec: resd 1 | |
| 30 | .st_mtime: resd 1 | |
| 31 | .st_mtime_nsec: resd 1 | |
| 32 | .st_ctime: resd 1 | |
| 33 | .st_ctime_nsec: resd 1 | |
| 34 | .unused4: resd 1 | |
| 35 | .unused5: resd 1 | |
| 36 | endstruc | |
| 37 | ||
| 38 | %define sizeof(x) x %+ _size | |
| 39 | ||
| 40 | SECTION .data | |
| 41 | szFile db "TEST", 0 | |
| 42 | File_Len equ $-szFile | |
| 43 | ||
| 44 | ||
| 45 | SECTION .bss | |
| 46 | stat resb sizeof(STAT) | |
| 47 | Org_Break resd 1 | |
| 48 | TempBuf resd 1 | |
| 49 | ||
| 50 | SECTION .text | |
| 51 | global _start | |
| 52 | ||
| 53 | _start: | |
| 54 | ;~ Get file size | |
| 55 | mov ebx, szFile | |
| 56 | mov ecx, stat | |
| 57 | mov eax, sys_newstat | |
| 58 | int 80H | |
| 59 | ||
| 60 | ;~ Get end of bss section | |
| 61 | xor ebx, ebx | |
| 62 | mov eax, sys_brk | |
| 63 | int 80H | |
| 64 | mov [Org_Break], eax | |
| 65 | mov [TempBuf], eax | |
| 66 | push eax | |
| 67 | ||
| 68 | ; extend it by file size | |
| 69 | pop ebx | |
| 70 | add ebx, dword [stat + STAT.st_size] | |
| 71 | mov eax, sys_brk | |
| 72 | int 80H | |
| 73 | ||
| 74 | ;~ open file | |
| 75 | mov ebx, szFile | |
| 76 | mov ecx, O_RDONLY | |
| 77 | xor edx, edx | |
| 78 | mov eax, sys_open | |
| 79 | int 80H | |
| 80 | xchg eax, esi | |
| 81 | ||
| 82 | ;~ read in file to buffer | |
| 83 | mov ebx, esi | |
| 84 | mov ecx, [TempBuf] | |
| 85 | mov edx, dword [stat + STAT.st_size] | |
| 86 | mov eax, sys_read | |
| 87 | int 80H | |
| 88 | ||
| 89 | ;~ display to terminal | |
| 90 | mov ebx, stdout | |
| 91 | mov ecx, [TempBuf] | |
| 92 | mov edx, eax | |
| 93 | mov eax, sys_write | |
| 94 | int 80H | |
| 95 | ||
| 96 | ;~ close file | |
| 97 | mov ebx, esi | |
| 98 | mov eax, sys_close | |
| 99 | int 80H | |
| 100 | ||
| 101 | ;~ "free" memory | |
| 102 | mov ebx, [Org_Break] | |
| 103 | mov eax, sys_brk | |
| 104 | int 80H | |
| 105 | ||
| 106 | Exit: | |
| 107 | mov eax, sys_exit | |
| 108 | xor ebx, ebx | |
| 109 | int 80H |
