diff options
Diffstat (limited to 'subx')
| -rw-r--r-- | subx/apps/crenshaw2-1 | bin | 0 -> 193 bytes | |||
| -rw-r--r-- | subx/apps/crenshaw2-1.subx | 55 |
2 files changed, 55 insertions, 0 deletions
diff --git a/subx/apps/crenshaw2-1 b/subx/apps/crenshaw2-1 new file mode 100644 index 00000000..12e6ad52 --- /dev/null +++ b/subx/apps/crenshaw2-1 Binary files differdiff --git a/subx/apps/crenshaw2-1.subx b/subx/apps/crenshaw2-1.subx new file mode 100644 index 00000000..095f0740 --- /dev/null +++ b/subx/apps/crenshaw2-1.subx @@ -0,0 +1,55 @@ +## port of https://github.com/akkartik/crenshaw/blob/master/tutor2.1.pas +# corresponds to the section "single digits" in https://compilers.iecc.com/crenshaw/tutor2.txt +# +# To run: +# $ subx translate apps/crenshaw2.1.subx crenshaw 2.1 +# $ echo '3' |subx run apps/crenshaw2.1 |xxd - +# Expected output: +# TODO +# +# Major note: byte strings are not null-terminated. Instead they're prefixed +# with a 32-bit length. + +== 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 + +# main: + # error(Error_integer) + # prepare call + 55/push . . . . . . . . # push EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # push args + 68/push . . . . . . . Error_integer/imm32 # push 5 + # call + e8/call . . . . . . error/disp32 + # exit(0) + bb/copy . . . . . . . 0/imm32 # copy 0 to EBX + b8/copy . . . . . . . 1/imm32/exit # copy 1 to EAX + cd/syscall . . . . . . . 0x80/imm8 # int 80h + +error: # s : (address array byte) -> <void> + # write(2/stderr, (data) s+4, (size) *s) + # fd = 2 (stderr) + bb/copy . . . . . . . 1/imm32 # copy 2 to EBX + # x = s+4 + 8b/copy 1/mod/*+disp8 4/rm32/SIB 4/base/ESP 4/index/none . 1/r32/ECX 4/disp8 . # copy *(ESP+4) to ECX + 81 0/subop/add 3/mod/direct 1/rm32/ECX . . . . . 4/imm32 # add 4 to ECX + # size = *s + 8b/copy 1/mod/*+disp8 4/rm32/SIB 4/base/ESP 4/index/none . 2/r32/EDX 4/disp8 . # copy *(ESP+4) to ECX + 8b/copy 0/mod/indirect 2/rm32/EDX . . . 2/r32/EDX . . # copy *EDX to EDX + # call write() + b8/copy . . . . . . . 4/imm32/write # copy 1 to EAX + cd/syscall . . . . . . . 0x80/imm8 # int 80h + # exit(1) + bb/copy . . . . . . . 1/imm32 # copy 1 to EBX + b8/copy . . . . . . . 1/imm32/exit # copy 1 to EAX + cd/syscall . . . . . . . 0x80/imm8 # int 80h + +== data +Error_integer: # "Integer" : (array byte) + # size + 08 00 00 00 + # data + 49 6e 74 65 67 65 72 10 |