diff options
Diffstat (limited to 'subx/examples')
| -rw-r--r-- | subx/examples/ex1.subx | 11 | ||||
| -rw-r--r-- | subx/examples/ex2.subx | 13 | ||||
| -rw-r--r-- | subx/examples/ex4.subx | 50 | ||||
| -rw-r--r-- | subx/examples/ex7.subx | 14 | ||||
| -rw-r--r-- | subx/examples/ex8.subx | 2 |
5 files changed, 40 insertions, 50 deletions
diff --git a/subx/examples/ex1.subx b/subx/examples/ex1.subx index 444f872a..8839fb6b 100644 --- a/subx/examples/ex1.subx +++ b/subx/examples/ex1.subx @@ -9,12 +9,9 @@ # 42 == code -# instruction effective address operand displacement immediate -# op subop mod rm32 base index scale r32 -# 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes - bb/copy-to-EBX 2a/imm32 - # exit(EBX) - b8/copy-to-EAX 1/imm32 - cd/syscall 0x80/imm8 +bb/copy-to-EBX 2a/imm32 +# exit(EBX) +b8/copy-to-EAX 1/imm32 +cd/syscall 0x80/imm8 # vim:nowrap:textwidth=0 diff --git a/subx/examples/ex2.subx b/subx/examples/ex2.subx index 3035b39f..e44d5ea8 100644 --- a/subx/examples/ex2.subx +++ b/subx/examples/ex2.subx @@ -8,13 +8,10 @@ # 2 == code -# instruction effective address operand displacement immediate -# op subop mod rm32 base index scale r32 -# 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes - bb/copy-to-EBX 1/imm32 - 43/inc-EBX - # exit(EBX) - b8/copy-to-EAX 1/imm32 - cd/syscall 0x80/imm8 +bb/copy-to-EBX 1/imm32 +43/inc-EBX +# exit(EBX) +b8/copy-to-EAX 1/imm32 +cd/syscall 0x80/imm8 # vim:nowrap:textwidth=0 diff --git a/subx/examples/ex4.subx b/subx/examples/ex4.subx index 3c4f8949..9e062cb2 100644 --- a/subx/examples/ex4.subx +++ b/subx/examples/ex4.subx @@ -5,35 +5,31 @@ # $ subx run examples/ex4 == code -# instruction effective address operand displacement immediate -# op subop mod rm32 base index scale r32 -# 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes +# read(stdin, x, 1) + # fd = 0 (stdin) +bb/copy-to-EBX 0/imm32 + # initialize x (location to write result to) +b9/copy-to-ECX x/imm32 + # size = 1 character +ba/copy-to-EDX 1/imm32 + # read(fd, x, size) +b8/copy-to-EAX 3/imm32/read +cd/syscall 0x80/imm8 - # read(stdin, x, 1) - # fd = 0 (stdin) - bb/copy-to-EBX 0/imm32 - # initialize x (location to write result to) - b9/copy-to-ECX x/imm32 - # size = 1 character - ba/copy-to-EDX 1/imm32 - # read(fd, x, size) - b8/copy-to-EAX 3/imm32/read - cd/syscall 0x80/imm8 +# write(stdout, x, 1) + # fd = 1 (stdout) +bb/copy-to-EBX 1/imm32 + # initialize x (location to read from) +b9/copy-to-ECX x/imm32 + # size = 1 character +ba/copy-to-EDX 1/imm32 + # write(fd, x, size) +b8/copy-to-EAX 4/imm32/write +cd/syscall 0x80/imm8 - # write(stdout, x, 1) - # fd = 1 (stdout) - bb/copy-to-EBX 1/imm32 - # initialize x (location to read from) - b9/copy-to-ECX x/imm32 - # size = 1 character - ba/copy-to-EDX 1/imm32 - # write(fd, x, size) - b8/copy-to-EAX 4/imm32/write - cd/syscall 0x80/imm8 - - # exit(EBX) - b8/copy-to-EAX 1/imm32/exit - cd/syscall 0x80/imm8 +# exit(EBX) +b8/copy-to-EAX 1/imm32/exit +cd/syscall 0x80/imm8 == data x: diff --git a/subx/examples/ex7.subx b/subx/examples/ex7.subx index 841daf61..615f5d21 100644 --- a/subx/examples/ex7.subx +++ b/subx/examples/ex7.subx @@ -29,12 +29,12 @@ cd/syscall 0x80/imm8 # save stream bb/copy-to-EBX stream/imm32 - 89/copy 0/mod/indirect 3/rm32/EBX 0/r32/EAX # copy EAX to *EBX + 89/copy 0/mod/indirect 3/rm32/EBX . . . 0/r32/EAX . . # copy EAX to *EBX # write(stream, "a", 1) # load stream bb/copy-to-EBX stream/imm32 - 8b/copy 0/mod/indirect 3/rm32/EBX 3/r32/EBX # copy *EBX to EBX + 8b/copy 0/mod/indirect 3/rm32/EBX . . . 3/r32/EBX . . # copy *EBX to EBX # b9/copy-to-ECX a/imm32 ba/copy-to-EDX 1/imm32/size @@ -44,7 +44,7 @@ # close(stream) # load stream bb/copy-to-EBX stream/imm32 - 8b/copy 0/mod/indirect 3/rm32/EBX 3/r32/EBX # copy *EBX to EBX + 8b/copy 0/mod/indirect 3/rm32/EBX . . . 3/r32/EBX . . # copy *EBX to EBX # b8/copy-to-EAX 6/imm32/close cd/syscall 0x80/imm8 @@ -57,12 +57,12 @@ cd/syscall 0x80/imm8 # save stream bb/copy-to-EBX stream/imm32 - 89/copy 0/mod/indirect 3/rm32/EBX 0/r32/EAX # copy EAX to *EBX + 89/copy 0/mod/indirect 3/rm32/EBX . . . 0/r32/EAX . . # copy EAX to *EBX # read(stream, b, 1) # load stream bb/copy-to-EBX stream/imm32 - 8b/copy 0/mod/indirect 3/rm32/EBX 3/r32/EBX # copy *EBX to EBX + 8b/copy 0/mod/indirect 3/rm32/EBX . . . 3/r32/EBX . . # copy *EBX to EBX # b9/copy-to-ECX b/imm32 ba/copy-to-EDX 1/imm32/size @@ -72,7 +72,7 @@ # close(stream) # load stream bb/copy-to-EBX stream/imm32 - 8b/copy 0/mod/indirect 3/rm32/EBX 3/r32/EBX # copy *EBX to EBX + 8b/copy 0/mod/indirect 3/rm32/EBX . . . 3/r32/EBX . . # copy *EBX to EBX # b8/copy-to-EAX 6/imm32/close cd/syscall 0x80/imm8 @@ -85,7 +85,7 @@ # exit(b) # load b bb/copy-to-EBX b/imm32 - 8b/copy 0/mod/indirect 3/rm32/EBX 3/r32/EBX # copy *EBX to EBX + 8b/copy 0/mod/indirect 3/rm32/EBX . . . 3/r32/EBX . . # copy *EBX to EBX # b8/copy-to-EAX 1/imm32/exit cd/syscall 0x80/imm8 diff --git a/subx/examples/ex8.subx b/subx/examples/ex8.subx index adc3f413..4dc0054f 100644 --- a/subx/examples/ex8.subx +++ b/subx/examples/ex8.subx @@ -35,7 +35,7 @@ ascii-length: # (s) # initialize s (EDX) - 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none 2/r32/EDX 4/disp8 # copy *(ESP+4) to EDX + 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none . 2/r32/EDX 4/disp8 . # copy *(ESP+4) to EDX # var result = 0 (EAX) b8/copy-to-EAX 0/imm32 $ascii-length-loop: |