diff options
Diffstat (limited to 'subx')
| -rw-r--r-- | subx/ex1.1.subx | 3 | ||||
| -rw-r--r-- | subx/ex1.2.subx | 9 | ||||
| -rw-r--r-- | subx/ex2.subx | 8 | ||||
| -rw-r--r-- | subx/ex3.subx | 14 | ||||
| -rw-r--r-- | subx/ex4.subx | 24 | ||||
| -rw-r--r-- | subx/ex5.subx | 30 | ||||
| -rw-r--r-- | subx/ex6.subx | 16 |
7 files changed, 55 insertions, 49 deletions
diff --git a/subx/ex1.1.subx b/subx/ex1.1.subx index 7dbcf8af..1cbe5dc1 100644 --- a/subx/ex1.1.subx +++ b/subx/ex1.1.subx @@ -4,6 +4,9 @@ # To run: # $ subx translate ex1.1.subx ex1 # $ subx run ex1 +# Expected result: +# $ echo $? +# 42 == 0x08048054 # code segment, after leaving room for ELF header # opcode ModR/M SIB displacement immediate diff --git a/subx/ex1.2.subx b/subx/ex1.2.subx index a3eee2d9..844678b7 100644 --- a/subx/ex1.2.subx +++ b/subx/ex1.2.subx @@ -4,14 +4,17 @@ # To run: # $ subx translate ex1.2.subx ex1 # $ subx run ex1 +# Expected result: +# $ echo $? +# 42 == 0x08048054 # code segment, after leaving room for ELF header # 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 2a/imm32 # copy 42 to EBX + bb/copy 2a/imm32 # copy 42 to EBX # exit(EBX) - b8 1/imm32 # copy 1 to EAX - cd 0x80/imm8 # int 80h + b8/copy 1/imm32 # copy 1 to EAX + cd/syscall 0x80/imm8 # int 80h # vim:ft=subx diff --git a/subx/ex2.subx b/subx/ex2.subx index 82d84104..20cee840 100644 --- a/subx/ex2.subx +++ b/subx/ex2.subx @@ -11,10 +11,10 @@ # 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 1/imm32 # copy 1 to EBX - 81 0/add/subop 3/mod/direct 3/ebx/rm32 1/imm32 # add 1 to EBX + bb/copy 1/imm32 # copy 1 to EBX + 81 0/subop/add 3/mod/direct 3/rm32/ebx 1/imm32 # add 1 to EBX # exit(EBX) - b8 1/imm32 # copy 1 to EAX - cd 0x80/imm8 # int 80h + b8/copy 1/imm32 # copy 1 to EAX + cd/syscall 0x80/imm8 # int 80h # vim:ft=subx diff --git a/subx/ex3.subx b/subx/ex3.subx index 5b3fdb16..b2d6d7c4 100644 --- a/subx/ex3.subx +++ b/subx/ex3.subx @@ -12,24 +12,24 @@ # 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 # result: EBX = 0 - bb 0/imm32 # copy 0 to EBX + bb/copy 0/imm32 # copy 0 to EBX # counter: ECX = 1 - b9 1/imm32 # copy 1 to ECX + b9/copy 1/imm32 # copy 1 to ECX loop: # while (ECX <= 10) 81 7/subop/compare 3/mod/direct 1/rm32/ecx 0xa/imm32 # compare ECX, 10/imm - 7f exit/disp8 # jump-if-greater + 7f/jump-if exit/disp8 # jump-if-greater exit # EBX += ECX - 01 3/mod/direct 3/rm32/ebx 1/r32/ecx # add ECX to EBX + 01/add 3/mod/direct 3/rm32/ebx 1/r32/ecx # add ECX to EBX # ECX++ 81 0/subop/add 3/mod/direct 1/rm32/ecx 1/imm32 # add 1 to ECX # loop - eb loop/disp8 # jump + eb/jump loop/disp8 # jump loop exit: # exit(EBX) - b8 1/imm32 # copy 1 to EAX - cd 0x80/imm8 # int 80h + b8/copy 1/imm32 # copy 1 to EAX + cd/syscall 0x80/imm8 # int 80h # vim:ft=subx:nowrap diff --git a/subx/ex4.subx b/subx/ex4.subx index b8d5ca10..db4abae3 100644 --- a/subx/ex4.subx +++ b/subx/ex4.subx @@ -11,31 +11,31 @@ ## read(stdin, x, 1) # fd = 0 (stdin) - bb 0/imm32 # copy 0 to EBX + bb/copy 0/imm32 # copy 0 to EBX # set location to write to - b9 0x080490a7/imm32 # copy to ECX + b9/copy 0x080490a7/imm32 # copy to ECX # size = 1 character - ba 1/imm32 # copy 1 to EDX + ba/copy 1/imm32 # copy 1 to EDX # syscall = read - b8 3/imm32 # copy 3 to EAX + b8/copy 3/imm32 # copy 3 to EAX # call - cd 0x80/imm8 # int 80h + cd/syscall 0x80/imm8 # int 80h ## write(stdout, x, 1) # fd = 1 (stdout) - bb 1/imm32 # copy 1 to EBX + bb/copy 1/imm32 # copy 1 to EBX # set location to write to - b9 0x080490a7/imm32 # copy to ECX + b9/copy 0x080490a7/imm32 # copy to ECX # size = 1 character - ba 1/imm32 # copy 1 to EDX + ba/copy 1/imm32 # copy 1 to EDX # syscall = write - b8 4/imm32 # copy 4 to EAX + b8/copy 4/imm32 # copy 4 to EAX # call - cd 0x80/imm8 # int 80h + cd/syscall 0x80/imm8 # int 80h ## exit(EBX) - b8 1/imm32 # copy 1 to EAX - cd 0x80/imm8 # int 80h + b8/copy 1/imm32 # copy 1 to EAX + cd/syscall 0x80/imm8 # int 80h == 0x080490a7 00 00 00 00 # space for read() to write to diff --git a/subx/ex5.subx b/subx/ex5.subx index 65ca4807..540d0315 100644 --- a/subx/ex5.subx +++ b/subx/ex5.subx @@ -11,37 +11,37 @@ ## function main # prolog - 55 # push EBP - 89 3/mod/direct 5/rm32/EBP 4/r32/ESP # copy ESP to EBP + 55/push # push EBP + 89/copy 3/mod/direct 5/rm32/EBP 4/r32/ESP # copy ESP to EBP # allocate x on the stack - 81 5/subop/subtract 3/mod/direct 4/rm32/ESP 4/imm32 # subtract 4 bytes from ESP + 81 5/subop/subtract 3/mod/direct 4/rm32/ESP 4/imm32 # subtract 4 bytes from ESP ## read(stdin, x, 1) # fd = 0 (stdin) - bb 0/imm32 # copy 0 to EBX + bb/copy 0/imm32 # copy 0 to EBX # set location to read character to - 89 3/mod/direct 1/rm32/ECX 5/r32/EBP # copy EBP to ECX + 89/copy 3/mod/direct 1/rm32/ECX 5/r32/EBP # copy EBP to ECX # size = 1 character - ba 1/imm32 # copy 1 to EDX + ba/copy 1/imm32 # copy 1 to EDX # syscall = read - b8 3/imm32 # copy 3 to EAX + b8/copy 3/imm32 # copy 3 to EAX # call - cd 0x80/imm8 # int 80h + cd/syscall 0x80/imm8 # int 80h ## write(stdout, x, 1) # fd = 1 (stdout) - bb 1/imm32 # copy 1 to EBX + bb/copy 1/imm32 # copy 1 to EBX # set location of character to write out - 89 3/mod/direct 1/rm32/ECX 5/r32/EBP # copy EBP to ECX + 89/copy 3/mod/direct 1/rm32/ECX 5/r32/EBP # copy EBP to ECX # size = 1 character - ba 1/imm32 # copy 1 to EDX + ba/copy 1/imm32 # copy 1 to EDX # syscall = write - b8 4/imm32 # copy 4 to EAX + b8/copy 4/imm32 # copy 4 to EAX # call - cd 0x80/imm8 # int 80h + cd/syscall 0x80/imm8 # int 80h ## exit(EBX) - b8 1/imm32 # copy 1 to EAX - cd 0x80/imm8 # int 80h + b8/copy 1/imm32 # copy 1 to EAX + cd/syscall 0x80/imm8 # int 80h # vim:ft=subx:nowrap diff --git a/subx/ex6.subx b/subx/ex6.subx index 68dcb8be..685076e7 100644 --- a/subx/ex6.subx +++ b/subx/ex6.subx @@ -12,20 +12,20 @@ ## write(stdout, x, 1) # fd = 1 (stdout) - bb 1/imm32 # copy 1 to EBX + bb/copy 1/imm32 # copy 1 to EBX # set location to write out - b9 0x08049097/imm32 # copy to ECX + b9/copy 0x08049097/imm32 # copy to ECX # set size - ba 0x08049093/imm32 # copy to EDX - 8b 0/mod/indirect 2/rm32/edx 2/r32/edx # copy *EDX to EDX + ba/copy 0x08049093/imm32 # copy to EDX + 8b/copy 0/mod/indirect 2/rm32/edx 2/r32/edx # copy *EDX to EDX # syscall = write - b8 4/imm32 # copy 4 to EAX + b8/copy 4/imm32 # copy 4 to EAX # call - cd 0x80/imm8 # int 80h + cd/syscall 0x80/imm8 # int 80h ## exit(EBX) - b8 1/imm32 # copy 1 to EAX - cd 0x80/imm8 # int 80h + b8/copy 1/imm32 # copy 1 to EAX + cd/syscall 0x80/imm8 # int 80h == 0x08049093 # size of string |