diff options
author | Kartik Agaram <vc@akkartik.com> | 2018-10-01 11:09:07 -0700 |
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committer | Kartik Agaram <vc@akkartik.com> | 2018-10-01 11:09:07 -0700 |
commit | ca00f6b97c52262b39c28cccb76b52e059553f13 (patch) | |
tree | 3c6e1ea3e36c849a344eac03a468b3e853241bb3 /subx/014indirect_addressing.cc | |
parent | 75e30d2faa3480ae8810856d6527089ba88346a5 (diff) | |
download | mu-ca00f6b97c52262b39c28cccb76b52e059553f13.tar.gz |
4634
Diffstat (limited to 'subx/014indirect_addressing.cc')
-rw-r--r-- | subx/014indirect_addressing.cc | 182 |
1 files changed, 91 insertions, 91 deletions
diff --git a/subx/014indirect_addressing.cc b/subx/014indirect_addressing.cc index b48cbd85..0882f4e8 100644 --- a/subx/014indirect_addressing.cc +++ b/subx/014indirect_addressing.cc @@ -3,15 +3,15 @@ :(scenario add_r32_to_mem_at_r32) % Reg[EBX].i = 0x10; -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; == 0x1 # code segment # op ModR/M SIB displacement immediate 01 18 # add EBX to *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 01 00 00 00 # 1 +run: add EBX to r/m32 -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: storing 0x00000011 :(before "End Mod Special-cases(addr)") @@ -31,16 +31,16 @@ case 0: // indirect addressing put(name, "03", "add rm32 to r32"); :(scenario add_mem_at_r32_to_r32) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[EBX].i = 0x10; == 0x1 # code segment # op ModR/M SIB displacement immediate 03 18 # add *EAX to EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 01 00 00 00 # 1 +run: add r/m32 to EBX -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: storing 0x00000011 :(before "End Single-Byte Opcodes") @@ -56,16 +56,16 @@ case 0x03: { // add r/m32 to r32 //:: subtract :(scenario subtract_r32_from_mem_at_r32) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[EBX].i = 1; == 0x1 # code segment # op ModR/M SIB displacement immediate 29 18 # subtract EBX from *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 0a 00 00 00 # 10 +run: subtract EBX from r/m32 -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: storing 0x00000009 //: @@ -74,16 +74,16 @@ case 0x03: { // add r/m32 to r32 put(name, "2b", "subtract rm32 from r32"); :(scenario subtract_mem_at_r32_from_r32) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[EBX].i = 10; == 0x1 # code segment # op ModR/M SIB displacement immediate 2b 18 # subtract *EAX from EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 01 00 00 00 # 1 +run: subtract r/m32 from EBX -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: storing 0x00000009 :(before "End Single-Byte Opcodes") @@ -99,16 +99,16 @@ case 0x2b: { // subtract r/m32 from r32 //:: and :(scenario and_r32_with_mem_at_r32) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[EBX].i = 0xff; == 0x1 # code segment # op ModR/M SIB displacement immediate 21 18 # and EBX with *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 0d 0c 0b 0a # 0x0a0b0c0d +run: and EBX with r/m32 -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: storing 0x0000000d //: @@ -117,16 +117,16 @@ case 0x2b: { // subtract r/m32 from r32 put(name, "23", "r32 = bitwise AND of r32 with rm32"); :(scenario and_mem_at_r32_with_r32) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[EBX].i = 0x0a0b0c0d; == 0x1 # code segment # op ModR/M SIB displacement immediate 23 18 # and *EAX with EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment ff 00 00 00 # 0xff +run: and r/m32 with EBX -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: storing 0x0000000d :(before "End Single-Byte Opcodes") @@ -142,16 +142,16 @@ case 0x23: { // and r/m32 with r32 //:: or :(scenario or_r32_with_mem_at_r32) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[EBX].i = 0xa0b0c0d0; == 0x1 # code segment # op ModR/M SIB displacement immediate 09 18 # or EBX with *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 0d 0c 0b 0a # 0x0a0b0c0d +run: or EBX with r/m32 -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: storing 0xaabbccdd //: @@ -160,16 +160,16 @@ case 0x23: { // and r/m32 with r32 put(name, "0b", "r32 = bitwise OR of r32 with rm32"); :(scenario or_mem_at_r32_with_r32) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[EBX].i = 0xa0b0c0d0; == 0x1 # code segment # op ModR/M SIB displacement immediate 0b 18 # or *EAX with EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 0d 0c 0b 0a # 0x0a0b0c0d +run: or r/m32 with EBX -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: storing 0xaabbccdd :(before "End Single-Byte Opcodes") @@ -185,16 +185,16 @@ case 0x0b: { // or r/m32 with r32 //:: xor :(scenario xor_r32_with_mem_at_r32) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[EBX].i = 0xa0b0c0d0; == 0x1 # code segment # op ModR/M SIB displacement immediate 31 18 # xor EBX with *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 0d 0c bb aa # 0xaabb0c0d +run: xor EBX with r/m32 -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: storing 0x0a0bccdd //: @@ -203,16 +203,16 @@ case 0x0b: { // or r/m32 with r32 put(name, "33", "r32 = bitwise XOR of r32 with rm32"); :(scenario xor_mem_at_r32_with_r32) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[EBX].i = 0xa0b0c0d0; == 0x1 # code segment # op ModR/M SIB displacement immediate 33 18 # xor *EAX with EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 0d 0c 0b 0a # 0x0a0b0c0d +run: xor r/m32 with EBX -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: storing 0xaabbccdd :(before "End Single-Byte Opcodes") @@ -228,57 +228,57 @@ case 0x33: { // xor r/m32 with r32 //:: not :(scenario not_of_mem_at_r32) -% Reg[EBX].i = 0x60; +% Reg[EBX].i = 0x2000; == 0x1 # code segment # op ModR/M SIB displacement immediate f7 13 # negate *EBX # ModR/M in binary: 00 (indirect mode) 010 (subop not) 011 (dest EBX) -== 0x60 # data segment +== 0x2000 # data segment ff 00 0f 0f # 0x0f0f00ff +run: operate on r/m32 -+run: effective address is 0x60 (EBX) ++run: effective address is 0x2000 (EBX) +run: subop: not +run: storing 0xf0f0ff00 //:: compare (cmp) :(scenario compare_mem_at_r32_with_r32_greater) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[EBX].i = 0x0a0b0c07; == 0x1 # code segment # op ModR/M SIB displacement immediate 39 18 # compare EBX with *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 0d 0c 0b 0a # 0x0a0b0c0d +run: compare EBX with r/m32 -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: SF=0; ZF=0; OF=0 :(scenario compare_mem_at_r32_with_r32_lesser) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[EBX].i = 0x0a0b0c0d; == 0x1 # code segment # op ModR/M SIB displacement immediate 39 18 # compare EBX with *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 07 0c 0b 0a # 0x0a0b0c0d +run: compare EBX with r/m32 -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: SF=1; ZF=0; OF=0 :(scenario compare_mem_at_r32_with_r32_equal) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[EBX].i = 0x0a0b0c0d; == 0x1 # code segment # op ModR/M SIB displacement immediate 39 18 # compare EBX with *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 0d 0c 0b 0a # 0x0a0b0c0d +run: compare EBX with r/m32 -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: SF=0; ZF=1; OF=0 //: @@ -287,16 +287,16 @@ ff 00 0f 0f # 0x0f0f00ff put(name, "3b", "compare: set SF if r32 < rm32"); :(scenario compare_r32_with_mem_at_r32_greater) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[EBX].i = 0x0a0b0c0d; == 0x1 # code segment # op ModR/M SIB displacement immediate 3b 18 # compare *EAX with EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 07 0c 0b 0a # 0x0a0b0c0d +run: compare r/m32 with EBX -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: SF=0; ZF=0; OF=0 :(before "End Single-Byte Opcodes") @@ -316,29 +316,29 @@ case 0x3b: { // set SF if r32 < r/m32 } :(scenario compare_r32_with_mem_at_r32_lesser) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[EBX].i = 0x0a0b0c07; == 0x1 # code segment # op ModR/M SIB displacement immediate 3b 18 # compare *EAX with EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 0d 0c 0b 0a # 0x0a0b0c0d +run: compare r/m32 with EBX -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: SF=1; ZF=0; OF=0 :(scenario compare_r32_with_mem_at_r32_equal) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[EBX].i = 0x0a0b0c0d; == 0x1 # code segment # op ModR/M SIB displacement immediate 3b 18 # compare *EAX with EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 0d 0c 0b 0a # 0x0a0b0c0d +run: compare r/m32 with EBX -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: SF=0; ZF=1; OF=0 //:: copy (mov) @@ -360,15 +360,15 @@ case 0x3b: { // set SF if r32 < r/m32 put(name, "8b", "copy rm32 to r32"); :(scenario copy_mem_at_r32_to_r32) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; == 0x1 # code segment # op ModR/M SIB displacement immediate 8b 18 # copy *EAX to EBX # ModR/M in binary: 00 (indirect mode) 011 (src EBX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment af 00 00 00 # 0xaf +run: copy r/m32 to EBX -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: storing 0x000000af :(before "End Single-Byte Opcodes") @@ -389,17 +389,17 @@ put(name, "88", "copy r8 (lowermost byte of r32) to r8/m8-at-r32"); :(scenario copy_r8_to_mem_at_r32) % Reg[EBX].i = 0x224488ab; -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; == 0x1 # op ModR/M SIB displacement immediate 88 18 # copy just the lowermost byte of EBX to the byte at *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EBX) 000 (dest EAX) -== 0x60 +== 0x2000 f0 cc bb aa # 0xf0 with more data in following bytes +run: copy lowermost byte of EBX to r8/m8-at-r32 -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: storing 0xab -% CHECK_EQ(0xaabbccab, read_mem_u32(0x60)); +% CHECK_EQ(0xaabbccab, read_mem_u32(0x2000)); :(before "End Single-Byte Opcodes") case 0x88: { // copy r/m8 to r8 @@ -420,15 +420,15 @@ put(name, "8a", "copy r8/m8-at-r32 to r8 (lowermost byte of r32)"); :(scenario copy_mem_at_r32_to_r8) % Reg[EBX].i = 0xaabbcc0f; // one nibble each of lowest byte set to all 0s and all 1s, to maximize value of this test -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; == 0x1 # op ModR/M SIB displacement immediate 8a 18 # copy just the byte at *EAX to lowermost byte of EBX (clearing remaining bytes) # ModR/M in binary: 00 (indirect mode) 011 (dest EBX) 000 (src EAX) -== 0x60 # data segment +== 0x2000 # data segment ab ff ff ff # 0xab with more data in following bytes +run: copy r8/m8-at-r32 to lowermost byte of EBX -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: storing 0xab # remaining bytes of EBX are *not* cleared +run: EBX now contains 0xaabbccab @@ -449,18 +449,18 @@ case 0x8a: { // copy r/m8 to r8 //:: jump :(scenario jump_mem_at_r32) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; == 0x1 # code segment # op ModR/M SIB displacement immediate ff 20 # jump to *EAX # ModR/M in binary: 00 (indirect mode) 100 (jump to r/m32) 000 (src EAX) 05 00 00 00 01 05 00 00 00 02 -== 0x60 # data segment +== 0x2000 # data segment 08 00 00 00 # 8 +run: inst: 0x00000001 +run: jump to r/m32 -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: jumping to 0x00000008 +run: inst: 0x00000008 -run: inst: 0x00000003 @@ -477,16 +477,16 @@ case 4: { // jump to r/m32 //:: push :(scenario push_mem_at_r32) -% Reg[EAX].i = 0x60; +% Reg[EAX].i = 0x2000; % Reg[ESP].u = 0x14; == 0x1 # code segment # op ModR/M SIB displacement immediate ff 30 # push *EAX to stack # ModR/M in binary: 00 (indirect mode) 110 (push r/m32) 000 (src EAX) -== 0x60 # data segment +== 0x2000 # data segment af 00 00 00 # 0xaf +run: push r/m32 -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) +run: decrementing ESP to 0x00000010 +run: pushing value 0x000000af @@ -505,17 +505,17 @@ put(name, "8f", "pop top of stack to rm32"); :(scenario pop_mem_at_r32) % Reg[EAX].i = 0x60; -% Reg[ESP].u = 0x10; +% Reg[ESP].u = 0x2000; == 0x1 # code segment # op ModR/M SIB displacement immediate 8f 00 # pop stack into *EAX # ModR/M in binary: 00 (indirect mode) 000 (pop r/m32) 000 (dest EAX) -== 0x10 # data segment +== 0x2000 # data segment 30 00 00 00 # 0x30 +run: pop into r/m32 +run: effective address is 0x60 (EAX) +run: popping value 0x00000030 -+run: incrementing ESP to 0x00000014 ++run: incrementing ESP to 0x00002004 :(before "End Single-Byte Opcodes") case 0x8f: { // pop stack into r/m32 @@ -538,12 +538,12 @@ case 0x8f: { // pop stack into r/m32 % Reg[EBX].i = 0x10; // source == 0x1 # code segment # op ModR/M SIB displacement immediate - 01 1d 60 00 00 00 # add EBX to *0x60 + 01 1d 00 20 00 00 # add EBX to *0x2000 # ModR/M in binary: 00 (indirect mode) 011 (src EBX) 101 (dest in disp32) -== 0x60 # data segment +== 0x2000 # data segment 01 00 00 00 # 1 +run: add EBX to r/m32 -+run: effective address is 0x60 (disp32) ++run: effective address is 0x2000 (disp32) +run: storing 0x00000011 :(before "End Mod 0 Special-cases(addr)") @@ -556,16 +556,16 @@ case 5: // exception: mod 0b00 rm 0b101 => incoming disp32 :(scenario add_r32_to_mem_at_r32_plus_disp8) % Reg[EBX].i = 0x10; // source -% Reg[EAX].i = 0x5e; // dest +% Reg[EAX].i = 0x1ffe; // dest == 0x1 # code segment # op ModR/M SIB displacement immediate 01 58 02 # add EBX to *(EAX+2) # ModR/M in binary: 01 (indirect+disp8 mode) 011 (src EBX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 01 00 00 00 # 1 +run: add EBX to r/m32 -+run: effective address is initially 0x5e (EAX) -+run: effective address is 0x60 (after adding disp8) ++run: effective address is initially 0x1ffe (EAX) ++run: effective address is 0x2000 (after adding disp8) +run: storing 0x00000011 :(before "End Mod Special-cases(addr)") @@ -585,32 +585,32 @@ case 1: // indirect + disp8 addressing :(scenario add_r32_to_mem_at_r32_plus_negative_disp8) % Reg[EBX].i = 0x10; // source -% Reg[EAX].i = 0x61; // dest +% Reg[EAX].i = 0x2001; // dest == 0x1 # code segment # op ModR/M SIB displacement immediate 01 58 ff # add EBX to *(EAX-1) # ModR/M in binary: 01 (indirect+disp8 mode) 011 (src EBX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 01 00 00 00 # 1 +run: add EBX to r/m32 -+run: effective address is initially 0x61 (EAX) -+run: effective address is 0x60 (after adding disp8) ++run: effective address is initially 0x2001 (EAX) ++run: effective address is 0x2000 (after adding disp8) +run: storing 0x00000011 //: :(scenario add_r32_to_mem_at_r32_plus_disp32) % Reg[EBX].i = 0x10; // source -% Reg[EAX].i = 0x5e; // dest +% Reg[EAX].i = 0x1ffe; // dest == 0x1 # code segment # op ModR/M SIB displacement immediate 01 98 02 00 00 00 # add EBX to *(EAX+2) # ModR/M in binary: 10 (indirect+disp32 mode) 011 (src EBX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 01 00 00 00 # 1 +run: add EBX to r/m32 -+run: effective address is initially 0x5e (EAX) -+run: effective address is 0x60 (after adding disp32) ++run: effective address is initially 0x1ffe (EAX) ++run: effective address is 0x2000 (after adding disp32) +run: storing 0x00000011 :(before "End Mod Special-cases(addr)") @@ -630,16 +630,16 @@ case 2: // indirect + disp32 addressing :(scenario add_r32_to_mem_at_r32_plus_negative_disp32) % Reg[EBX].i = 0x10; // source -% Reg[EAX].i = 0x61; // dest +% Reg[EAX].i = 0x2001; // dest == 0x1 # code segment # op ModR/M SIB displacement immediate 01 98 ff ff ff ff # add EBX to *(EAX-1) # ModR/M in binary: 10 (indirect+disp32 mode) 011 (src EBX) 000 (dest EAX) -== 0x60 # data segment +== 0x2000 # data segment 01 00 00 00 # 1 +run: add EBX to r/m32 -+run: effective address is initially 0x61 (EAX) -+run: effective address is 0x60 (after adding disp32) ++run: effective address is initially 0x2001 (EAX) ++run: effective address is 0x2000 (after adding disp32) +run: storing 0x00000011 //:: lea @@ -648,13 +648,13 @@ case 2: // indirect + disp32 addressing put(name, "8d", "load effective address of memory in rm32 into r32"); :(scenario lea) -% Reg[EAX].u = 0x60; +% Reg[EAX].u = 0x2000; == 0x1 # op ModR/M SIB displacement immediate 8d 18 # ModR/M in binary: 00 (indirect mode) 011 (dest EBX) 000 (src EAX) +run: lea into EBX -+run: effective address is 0x60 (EAX) ++run: effective address is 0x2000 (EAX) :(before "End Single-Byte Opcodes") case 0x8d: { // lea m32 to r32 |