diff options
| author | Kartik Agaram <vc@akkartik.com> | 2019-08-26 11:55:26 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2019-08-26 11:59:21 -0700 |
| commit | 333525360b22f3d3ea31db46a4d2f1b4edbfebdb (patch) | |
| tree | ed255f308542ba28a99d862d54d4992dcf749622 /069allocate.subx | |
| parent | 22fb844ba4edf14eb85245a35f42e721658c4f8e (diff) | |
| download | mu-333525360b22f3d3ea31db46a4d2f1b4edbfebdb.tar.gz | |
5592 - switch register names to lowercase
Diffstat (limited to '069allocate.subx')
| -rw-r--r-- | 069allocate.subx | 142 |
1 files changed, 71 insertions, 71 deletions
diff --git a/069allocate.subx b/069allocate.subx index 6521b43a..8845c8c3 100644 --- a/069allocate.subx +++ b/069allocate.subx @@ -23,33 +23,33 @@ # Claim the next 'n' bytes of memory starting at ad->curr and update ad->curr. # Abort if there isn't enough memory in 'ad'. -allocate: # ad : (address allocation-descriptor), n : int -> address-or-null/EAX +allocate: # ad : (address allocation-descriptor), n : int -> address-or-null/eax # . prolog - 55/push-EBP - 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # . save registers - 51/push-ECX - 52/push-EDX - # ECX = ad - 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 1/r32/ECX 8/disp8 . # copy *(EBP+8) to ECX + 51/push-ecx + 52/push-edx + # ecx = ad + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 8/disp8 . # copy *(ebp+8) to ecx # save ad->curr - 8b/copy 0/mod/indirect 1/rm32/ECX . . . 0/r32/EAX . . # copy *ECX to EAX + 8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax # check if there's enough space - # . EDX = ad->curr + n - 89/copy 3/mod/direct 2/rm32/EDX . . . 0/r32/EAX . . # copy EAX to EDX - 03/add 1/mod/*+disp8 5/rm32/EBP . . . 2/r32/EDX 0xc/disp8 . # add *(EBP+12) to EDX - 3b/compare 1/mod/*+disp8 1/rm32/ECX . . . 2/r32/EDX 4/disp8 . # compare EDX with *(ECX+4) + # . edx = ad->curr + n + 89/copy 3/mod/direct 2/rm32/edx . . . 0/r32/eax . . # copy eax to edx + 03/add 1/mod/*+disp8 5/rm32/ebp . . . 2/r32/edx 0xc/disp8 . # add *(ebp+12) to edx + 3b/compare 1/mod/*+disp8 1/rm32/ecx . . . 2/r32/edx 4/disp8 . # compare edx with *(ecx+4) 73/jump-if-greater-or-equal-signed $allocate:abort/disp8 $allocate:commit: # update ad->curr - 89/copy 0/mod/indirect 1/rm32/ECX . . . 2/r32/EDX . . # copy EDX to *ECX + 89/copy 0/mod/indirect 1/rm32/ecx . . . 2/r32/edx . . # copy edx to *ecx $allocate:end: # . restore registers - 5a/pop-to-EDX - 59/pop-to-ECX + 5a/pop-to-edx + 59/pop-to-ecx # . epilog - 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP - 5d/pop-to-EBP + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp c3/return $allocate:abort: @@ -60,124 +60,124 @@ $allocate:abort: # . . call e8/call _write/disp32 # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # . syscall(exit, 1) - bb/copy-to-EBX 1/imm32 - b8/copy-to-EAX 1/imm32/exit + bb/copy-to-ebx 1/imm32 + b8/copy-to-eax 1/imm32/exit cd/syscall 0x80/imm8 # never gets here test-allocate-success: # . prolog - 55/push-EBP - 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP - # var ad/ECX : (address allocation-descriptor) = {11, 15} + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # var ad/ecx : (address allocation-descriptor) = {11, 15} 68/push 0xf/imm32/limit 68/push 0xb/imm32/curr - 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX - # EAX = allocate(ad, 3) + 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx + # eax = allocate(ad, 3) # . . push args 68/push 3/imm32 - 51/push-ECX + 51/push-ecx # . . call e8/call allocate/disp32 # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP - # check-ints-equal(EAX, 11, msg) + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # check-ints-equal(eax, 11, msg) # . . push args 68/push "F - test-allocate-success: returns current pointer of allocation descriptor"/imm32 68/push 0xb/imm32 - 50/push-EAX + 50/push-eax # . . call e8/call check-ints-equal/disp32 # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(ad->curr, 14, msg) # . . push args 68/push "F - test-allocate-success: updates allocation descriptor"/imm32 68/push 0xe/imm32 - ff 6/subop/push 0/mod/indirect 1/rm32/ECX . . . . . . # push *ECX + ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx # . . call e8/call check-ints-equal/disp32 # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # . epilog - 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP - 5d/pop-to-EBP + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp c3/return _pending-test-allocate-failure: # . prolog - 55/push-EBP - 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP - # var ad/ECX : (address allocation-descriptor) = {11, 15} + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # var ad/ecx : (address allocation-descriptor) = {11, 15} 68/push 0xf/imm32/limit 68/push 0xb/imm32/curr - 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX - # EAX = allocate(ad, 6) + 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx + # eax = allocate(ad, 6) # . . push args 68/push 6/imm32 - 51/push-ECX + 51/push-ecx # . . call e8/call allocate/disp32 # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP - # check-ints-equal(EAX, 0, msg) + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # check-ints-equal(eax, 0, msg) # . . push args 68/push "F - test-allocate-failure: returns null"/imm32 68/push 0/imm32 - 50/push-EAX + 50/push-eax # . . call e8/call check-ints-equal/disp32 # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # no change to ad->curr # . check-ints-equal(ad->curr, 11) # . . push args 68/push "F - test-allocate-failure: updates allocation descriptor"/imm32 68/push 0xb/imm32 - ff 6/subop/push 0/mod/indirect 1/rm32/ECX . . . . . . # push *ECX + ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx # . . call e8/call check-ints-equal/disp32 # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # . epilog - 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP - 5d/pop-to-EBP + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp c3/return # helper: create a nested allocation descriptor (useful for tests) allocate-region: # ad : (address allocation-descriptor), n : int -> new-ad : (address allocation-descriptor) # . prolog - 55/push-EBP - 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # . save registers - 51/push-ECX - # EAX = allocate(ad, n) + 51/push-ecx + # eax = allocate(ad, n) # . . push args - ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12) - ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8) + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call allocate/disp32 # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP - # if (EAX == 0) abort - 3d/compare-EAX-and 0/imm32 + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # if (eax == 0) abort + 3d/compare-eax-and 0/imm32 74/jump-if-equal $allocate-region:abort/disp8 # earmark 8 bytes at the start for a new allocation descriptor - # . *EAX = EAX + 8 - 89/copy 3/mod/direct 1/rm32/ECX . . . 0/r32/EAX . . # copy EAX to ECX - 81 0/subop/add 3/mod/direct 1/rm32/ECX . . . . . 8/imm32 # add to ECX - 89/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy ECX to *EAX - # . *(EAX+4) = EAX + n - 89/copy 3/mod/direct 1/rm32/ECX . . . 0/r32/EAX . . # copy EAX to ECX - 03/add 1/mod/*+disp8 5/rm32/EBP . . . 1/r32/ECX 0xc/disp8 . # add *(EBP+12) to ECX - 89/copy 1/mod/*+disp8 0/rm32/EAX . . . 1/r32/ECX 4/disp8 . # copy ECX to *(EAX+4) + # . *eax = eax + 8 + 89/copy 3/mod/direct 1/rm32/ecx . . . 0/r32/eax . . # copy eax to ecx + 81 0/subop/add 3/mod/direct 1/rm32/ecx . . . . . 8/imm32 # add to ecx + 89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax + # . *(eax+4) = eax + n + 89/copy 3/mod/direct 1/rm32/ecx . . . 0/r32/eax . . # copy eax to ecx + 03/add 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0xc/disp8 . # add *(ebp+12) to ecx + 89/copy 1/mod/*+disp8 0/rm32/eax . . . 1/r32/ecx 4/disp8 . # copy ecx to *(eax+4) # . restore registers - 59/pop-to-ECX + 59/pop-to-ecx # . epilog - 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP - 5d/pop-to-EBP + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp c3/return # We could create a more general '$abort' jump target, but then we'd need to do @@ -194,10 +194,10 @@ $allocate-region:abort: # . . call e8/call _write/disp32 # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # . syscall(exit, 1) - bb/copy-to-EBX 1/imm32 - b8/copy-to-EAX 1/imm32/exit + bb/copy-to-ebx 1/imm32 + b8/copy-to-eax 1/imm32/exit cd/syscall 0x80/imm8 # never gets here |