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 /076zero-out.subx | |
| parent | 22fb844ba4edf14eb85245a35f42e721658c4f8e (diff) | |
| download | mu-333525360b22f3d3ea31db46a4d2f1b4edbfebdb.tar.gz | |
5592 - switch register names to lowercase
Diffstat (limited to '076zero-out.subx')
| -rw-r--r-- | 076zero-out.subx | 72 |
1 files changed, 36 insertions, 36 deletions
diff --git a/076zero-out.subx b/076zero-out.subx index bc19dc21..1a4c73d1 100644 --- a/076zero-out.subx +++ b/076zero-out.subx @@ -7,8 +7,8 @@ zero-out: # start : address, len : int # pseudocode: - # curr/ESI = start - # i/ECX = 0 + # curr/esi = start + # i/ecx = 0 # while true # if (i >= len) break # *curr = 0 @@ -16,69 +16,69 @@ zero-out: # start : address, len : int # ++i # # . 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 - 50/push-EAX - 51/push-ECX - 52/push-EDX - 56/push-ESI - # curr/ESI = start - 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 8/disp8 . # copy *(EBP+8) to ESI - # i/ECX = 0 - 31/xor 3/mod/direct 1/rm32/ECX . . . 1/r32/ECX . . # clear ECX - # EDX = len - 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 2/r32/EDX 0xc/disp8 . # copy *(EBP+12) to EDX + 50/push-eax + 51/push-ecx + 52/push-edx + 56/push-esi + # curr/esi = start + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi + # i/ecx = 0 + 31/xor 3/mod/direct 1/rm32/ecx . . . 1/r32/ecx . . # clear ecx + # edx = len + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 2/r32/edx 0xc/disp8 . # copy *(ebp+12) to edx $zero-out:loop: # if (i >= len) break - 39/compare 3/mod/direct 1/rm32/ECX . . . 2/r32/EDX . . # compare ECX with EDX + 39/compare 3/mod/direct 1/rm32/ecx . . . 2/r32/edx . . # compare ecx with edx 7d/jump-if-greater-or-equal $zero-out:end/disp8 # *curr = 0 - c6 0/subop/copy 0/mod/direct 6/rm32/ESI . . . . . 0/imm8 # copy byte to *ESI + c6 0/subop/copy 0/mod/direct 6/rm32/esi . . . . . 0/imm8 # copy byte to *esi # ++curr - 46/increment-ESI + 46/increment-esi # ++i - 41/increment-ECX + 41/increment-ecx eb/jump $zero-out:loop/disp8 $zero-out:end: # . restore registers - 5e/pop-to-ESI - 5a/pop-to-EDX - 59/pop-to-ECX - 58/pop-to-EAX + 5e/pop-to-esi + 5a/pop-to-edx + 59/pop-to-ecx + 58/pop-to-eax # . 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 test-zero-out: # . prolog - 55/push-EBP - 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP - # region/ECX = 34, 35, 36, 37 + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # region/ecx = 34, 35, 36, 37 68/push 0x37363534/imm32 - 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX - # zero-out(ECX, 3) + 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx + # zero-out(ecx, 3) # . . push args 68/push 3/imm32/len - 51/push-ECX + 51/push-ecx # . . call e8/call zero-out/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 # first 3 bytes cleared, fourth left alone - # . check-ints-equal(*ECX, 0x37000000, msg) + # . check-ints-equal(*ecx, 0x37000000, msg) # . . push args 68/push "F - test-zero-out"/imm32 68/push 0x37000000/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 # . . vim:nowrap:textwidth=0 |