diff options
| -rw-r--r-- | subx/011direct_addressing.cc | 40 | ||||
| -rw-r--r-- | subx/012indirect_addressing.cc | 96 | ||||
| -rw-r--r-- | subx/013immediate_addressing.cc | 42 | ||||
| -rw-r--r-- | subx/014index_addressing.cc | 24 |
4 files changed, 101 insertions, 101 deletions
diff --git a/subx/011direct_addressing.cc b/subx/011direct_addressing.cc index cf61fb82..66dbc43a 100644 --- a/subx/011direct_addressing.cc +++ b/subx/011direct_addressing.cc @@ -1,8 +1,8 @@ //: operating directly on a register :(scenario add_r32_to_r32) -% Reg[0].i = 0x10; -% Reg[3].i = 1; +% Reg[EAX].i = 0x10; +% Reg[EBX].i = 1; # op ModR/M SIB displacement immediate 01 d8 # add EBX to EAX # ModR/M in binary: 11 (direct mode) 011 (src EBX) 000 (dest EAX) @@ -46,8 +46,8 @@ int32_t* effective_address(uint8_t modrm) { //:: subtract :(scenario subtract_r32_from_r32) -% Reg[0].i = 10; -% Reg[3].i = 1; +% Reg[EAX].i = 10; +% Reg[EBX].i = 1; # op ModR/M SIB displacement immediate 29 d8 # subtract EBX from EAX # ModR/M in binary: 11 (direct mode) 011 (src EBX) 000 (dest EAX) @@ -68,8 +68,8 @@ case 0x29: { // subtract r32 from r/m32 //:: and :(scenario and_r32_with_r32) -% Reg[0].i = 0x0a0b0c0d; -% Reg[3].i = 0x000000ff; +% Reg[EAX].i = 0x0a0b0c0d; +% Reg[EBX].i = 0x000000ff; # op ModR/M SIB displacement immediate 21 d8 # and EBX with destination EAX # ModR/M in binary: 11 (direct mode) 011 (src EBX) 000 (dest EAX) @@ -90,8 +90,8 @@ case 0x21: { // and r32 with r/m32 //:: or :(scenario or_r32_with_r32) -% Reg[0].i = 0x0a0b0c0d; -% Reg[3].i = 0xa0b0c0d0; +% Reg[EAX].i = 0x0a0b0c0d; +% Reg[EBX].i = 0xa0b0c0d0; # op ModR/M SIB displacement immediate 09 d8 # or EBX with destination EAX # ModR/M in binary: 11 (direct mode) 011 (src EBX) 000 (dest EAX) @@ -112,8 +112,8 @@ case 0x09: { // or r32 with r/m32 //:: xor :(scenario xor_r32_with_r32) -% Reg[0].i = 0x0a0b0c0d; -% Reg[3].i = 0xaabbc0d0; +% Reg[EAX].i = 0x0a0b0c0d; +% Reg[EBX].i = 0xaabbc0d0; # op ModR/M SIB displacement immediate 31 d8 # xor EBX with destination EAX # ModR/M in binary: 11 (direct mode) 011 (src EBX) 000 (dest EAX) @@ -134,7 +134,7 @@ case 0x31: { // xor r32 with r/m32 //:: not :(scenario not_r32) -% Reg[3].i = 0x0f0f00ff; +% Reg[EBX].i = 0x0f0f00ff; # op ModR/M SIB displacement immediate f7 c3 # not EBX # ModR/M in binary: 11 (direct mode) 000 (unused) 011 (dest EBX) @@ -158,8 +158,8 @@ case 0xf7: { // xor r32 with r/m32 //:: compare (cmp) :(scenario compare_r32_with_r32_greater) -% Reg[0].i = 0x0a0b0c0d; -% Reg[3].i = 0x0a0b0c07; +% Reg[EAX].i = 0x0a0b0c0d; +% Reg[EBX].i = 0x0a0b0c07; # op ModR/M SIB displacement immediate 39 d8 # compare EBX with EAX # ModR/M in binary: 11 (direct mode) 011 (src EBX) 000 (dest EAX) @@ -184,8 +184,8 @@ case 0x39: { // set SF if r/m32 < r32 } :(scenario compare_r32_with_r32_lesser) -% Reg[0].i = 0x0a0b0c07; -% Reg[3].i = 0x0a0b0c0d; +% Reg[EAX].i = 0x0a0b0c07; +% Reg[EBX].i = 0x0a0b0c0d; # op ModR/M SIB displacement immediate 39 d8 # compare EBX with EAX # ModR/M in binary: 11 (direct mode) 011 (src EBX) 000 (dest EAX) @@ -194,8 +194,8 @@ case 0x39: { // set SF if r/m32 < r32 +run: SF=1; ZF=0; OF=0 :(scenario compare_r32_with_r32_equal) -% Reg[0].i = 0x0a0b0c0d; -% Reg[3].i = 0x0a0b0c0d; +% Reg[EAX].i = 0x0a0b0c0d; +% Reg[EBX].i = 0x0a0b0c0d; # op ModR/M SIB displacement immediate 39 d8 # compare EBX with EAX # ModR/M in binary: 11 (direct mode) 011 (src EBX) 000 (dest EAX) @@ -206,7 +206,7 @@ case 0x39: { // set SF if r/m32 < r32 //:: copy (mov) :(scenario copy_r32_to_r32) -% Reg[3].i = 0xaf; +% Reg[EBX].i = 0xaf; # op ModR/M SIB displacement immediate 89 d8 # copy EBX to EAX # ModR/M in binary: 11 (direct mode) 011 (src EBX) 000 (dest EAX) @@ -228,8 +228,8 @@ case 0x89: { // copy r32 to r/m32 //:: xchg :(scenario xchg_r32_with_r32) -% Reg[3].i = 0xaf; -% Reg[0].i = 0x2e; +% Reg[EBX].i = 0xaf; +% Reg[EAX].i = 0x2e; # op ModR/M SIB displacement immediate 87 d8 # exchange EBX with EAX # ModR/M in binary: 11 (direct mode) 011 (src EBX) 000 (dest EAX) diff --git a/subx/012indirect_addressing.cc b/subx/012indirect_addressing.cc index 304467f7..59147c2d 100644 --- a/subx/012indirect_addressing.cc +++ b/subx/012indirect_addressing.cc @@ -2,8 +2,8 @@ //: we'll now start providing data in a separate segment :(scenario add_r32_to_mem_at_r32) -% Reg[3].i = 0x10; -% Reg[0].i = 0x60; +% Reg[EBX].i = 0x10; +% Reg[EAX].i = 0x60; == 0x01 # code segment # op ModR/M SIB displacement immediate 01 18 # add EBX to *EAX @@ -28,8 +28,8 @@ case 0: // indirect addressing //: :(scenario add_mem_at_r32_to_r32) -% Reg[0].i = 0x60; -% Reg[3].i = 0x10; +% Reg[EAX].i = 0x60; +% Reg[EBX].i = 0x10; % write_mem_i32(0x60, 1); # op ModR/M SIB displacement immediate 03 18 # add *EAX to EBX @@ -51,9 +51,9 @@ case 0x03: { // add r/m32 to r32 //:: subtract :(scenario subtract_r32_from_mem_at_r32) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 10); -% Reg[3].i = 1; +% Reg[EBX].i = 1; # 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) @@ -64,9 +64,9 @@ case 0x03: { // add r/m32 to r32 //: :(scenario subtract_mem_at_r32_from_r32) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 1); -% Reg[3].i = 10; +% Reg[EBX].i = 10; # 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) @@ -87,9 +87,9 @@ case 0x2b: { // subtract r/m32 from r32 //:: and :(scenario and_r32_with_mem_at_r32) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 0x0a0b0c0d); -% Reg[3].i = 0xff; +% Reg[EBX].i = 0xff; # 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) @@ -100,9 +100,9 @@ case 0x2b: { // subtract r/m32 from r32 //: :(scenario and_mem_at_r32_with_r32) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 0x000000ff); -% Reg[3].i = 0x0a0b0c0d; +% Reg[EBX].i = 0x0a0b0c0d; # 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) @@ -123,9 +123,9 @@ case 0x23: { // and r/m32 with r32 //:: or :(scenario or_r32_with_mem_at_r32) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 0x0a0b0c0d); -% Reg[3].i = 0xa0b0c0d0; +% Reg[EBX].i = 0xa0b0c0d0; # 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) @@ -136,9 +136,9 @@ case 0x23: { // and r/m32 with r32 //: :(scenario or_mem_at_r32_with_r32) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 0x0a0b0c0d); -% Reg[3].i = 0xa0b0c0d0; +% Reg[EBX].i = 0xa0b0c0d0; # 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) @@ -159,9 +159,9 @@ case 0x0b: { // or r/m32 with r32 //:: xor :(scenario xor_r32_with_mem_at_r32) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 0xaabb0c0d); -% Reg[3].i = 0xa0b0c0d0; +% Reg[EBX].i = 0xa0b0c0d0; # 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) @@ -172,9 +172,9 @@ case 0x0b: { // or r/m32 with r32 //: :(scenario xor_mem_at_r32_with_r32) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 0x0a0b0c0d); -% Reg[3].i = 0xa0b0c0d0; +% Reg[EBX].i = 0xa0b0c0d0; # 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) @@ -195,7 +195,7 @@ case 0x33: { // xor r/m32 with r32 //:: not :(scenario not_r32_with_mem_at_r32) -% Reg[3].i = 0x60; +% Reg[EBX].i = 0x60; # word at 0x60 is 0x0f0f00ff % write_mem_i32(0x60, 0x0f0f00ff); # op ModR/M SIB displacement immediate @@ -208,9 +208,9 @@ case 0x33: { // xor r/m32 with r32 //:: compare (cmp) :(scenario compare_mem_at_r32_with_r32_greater) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 0x0a0b0c0d); -% Reg[3].i = 0x0a0b0c07; +% Reg[EBX].i = 0x0a0b0c07; # 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) @@ -219,9 +219,9 @@ case 0x33: { // xor r/m32 with r32 +run: SF=0; ZF=0; OF=0 :(scenario compare_mem_at_r32_with_r32_lesser) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 0x0a0b0c07); -% Reg[3].i = 0x0a0b0c0d; +% Reg[EBX].i = 0x0a0b0c0d; # 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) @@ -230,9 +230,9 @@ case 0x33: { // xor r/m32 with r32 +run: SF=1; ZF=0; OF=0 :(scenario compare_mem_at_r32_with_r32_equal) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 0x0a0b0c0d); -% Reg[3].i = 0x0a0b0c0d; +% Reg[EBX].i = 0x0a0b0c0d; # 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) @@ -243,9 +243,9 @@ case 0x33: { // xor r/m32 with r32 //: :(scenario compare_r32_with_mem_at_r32_greater) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 0x0a0b0c07); -% Reg[3].i = 0x0a0b0c0d; +% Reg[EBX].i = 0x0a0b0c0d; # 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) @@ -270,9 +270,9 @@ case 0x3b: { // set SF if r32 < r/m32 } :(scenario compare_r32_with_mem_at_r32_lesser) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 0x0a0b0c0d); -% Reg[3].i = 0x0a0b0c07; +% Reg[EBX].i = 0x0a0b0c07; # 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) @@ -281,9 +281,9 @@ case 0x3b: { // set SF if r32 < r/m32 +run: SF=1; ZF=0; OF=0 :(scenario compare_r32_with_mem_at_r32_equal) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 0x0a0b0c0d); -% Reg[3].i = 0x0a0b0c0d; +% Reg[EBX].i = 0x0a0b0c0d; # 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) @@ -294,8 +294,8 @@ case 0x3b: { // set SF if r32 < r/m32 //:: copy (mov) :(scenario copy_r32_to_mem_at_r32) -% Reg[3].i = 0xaf; -% Reg[0].i = 0x60; +% Reg[EBX].i = 0xaf; +% Reg[EAX].i = 0x60; # op ModR/M SIB displacement immediate 89 18 # copy EBX to *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) @@ -306,7 +306,7 @@ case 0x3b: { // set SF if r32 < r/m32 //: :(scenario copy_mem_at_r32_to_r32) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 0x000000af); # op ModR/M SIB displacement immediate 8b 18 # copy *EAX to EBX @@ -329,7 +329,7 @@ case 0x8b: { // copy r32 to r/m32 //:: jump :(scenario jump_mem_at_r32) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 8); # op ModR/M SIB displacement immediate ff 20 # jump to *EAX @@ -363,7 +363,7 @@ case 0xff: { //:: push :(scenario push_mem_at_r32) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 0x000000af); % Reg[ESP].u = 0x14; # op ModR/M SIB displacement immediate @@ -385,7 +385,7 @@ case 6: { // push r/m32 to stack //:: pop :(scenario pop_mem_at_r32) -% Reg[0].i = 0x60; +% Reg[EAX].i = 0x60; % Reg[ESP].u = 0x10; % write_mem_i32(0x10, 0x00000030); # op ModR/M SIB displacement immediate @@ -414,7 +414,7 @@ case 0x8f: { // pop stack into r/m32 //:: special-case for loading address from disp32 rather than register :(scenario add_r32_to_mem_at_displacement) -% Reg[3].i = 0x10; // source +% Reg[EBX].i = 0x10; // source % write_mem_i32(0x60, 1); # op ModR/M SIB displacement immediate 01 1d 60 00 00 00 # add EBX to *0x60 @@ -432,8 +432,8 @@ case 5: // exception: mod 0b00 rm 0b101 => incoming disp32 //: :(scenario add_r32_to_mem_at_r32_plus_disp8) -% Reg[3].i = 0x10; // source -% Reg[0].i = 0x5e; // dest +% Reg[EBX].i = 0x10; // source +% Reg[EAX].i = 0x5e; // dest % write_mem_i32(0x60, 1); # op ModR/M SIB displacement immediate 01 58 02 # add EBX to *(EAX+2) @@ -459,8 +459,8 @@ case 1: // indirect + disp8 addressing break; :(scenario add_r32_to_mem_at_r32_plus_negative_disp8) -% Reg[3].i = 0x10; // source -% Reg[0].i = 0x61; // dest +% Reg[EBX].i = 0x10; // source +% Reg[EAX].i = 0x61; // dest % write_mem_i32(0x60, 1); # op ModR/M SIB displacement immediate 01 58 ff # add EBX to *(EAX-1) @@ -473,8 +473,8 @@ case 1: // indirect + disp8 addressing //: :(scenario add_r32_to_mem_at_r32_plus_disp32) -% Reg[3].i = 0x10; // source -% Reg[0].i = 0x5e; // dest +% Reg[EBX].i = 0x10; // source +% Reg[EAX].i = 0x5e; // dest % write_mem_i32(0x60, 1); # op ModR/M SIB displacement immediate 01 98 02 00 00 00 # add EBX to *(EAX+2) @@ -500,8 +500,8 @@ case 2: // indirect + disp32 addressing break; :(scenario add_r32_to_mem_at_r32_plus_negative_disp32) -% Reg[3].i = 0x10; // source -% Reg[0].i = 0x61; // dest +% Reg[EBX].i = 0x10; // source +% Reg[EAX].i = 0x61; // dest % write_mem_i32(0x60, 1); # op ModR/M SIB displacement immediate 01 98 ff ff ff ff # add EBX to *(EAX-1) diff --git a/subx/013immediate_addressing.cc b/subx/013immediate_addressing.cc index 78510535..ceb998ef 100644 --- a/subx/013immediate_addressing.cc +++ b/subx/013immediate_addressing.cc @@ -1,7 +1,7 @@ //: instructions that (immediately) contain an argument to act with :(scenario add_imm32_to_r32) -% Reg[3].i = 1; +% Reg[EBX].i = 1; # op ModR/M SIB displacement immediate 81 c3 0a 0b 0c 0d # add 0x0d0c0b0a to EBX # ModR/M in binary: 11 (direct mode) 000 (add imm32) 011 (dest EBX) @@ -33,7 +33,7 @@ case 0x81: { // combine imm32 with r/m32 //: :(scenario add_imm32_to_mem_at_r32) -% Reg[3].i = 0x60; +% Reg[EBX].i = 0x60; % write_mem_i32(0x60, 1); # op ModR/M SIB displacement immediate 81 03 0a 0b 0c 0d # add 0x0d0c0b0a to *EBX @@ -63,7 +63,7 @@ case 0x2d: { // subtract imm32 from EAX //: :(scenario subtract_imm32_from_mem_at_r32) -% Reg[3].i = 0x60; +% Reg[EBX].i = 0x60; % write_mem_i32(0x60, 10); # op ModR/M SIB displacement immediate 81 2b 01 00 00 00 # subtract 1 from *EBX @@ -83,7 +83,7 @@ case 5: { //: :(scenario subtract_imm32_from_r32) -% Reg[3].i = 10; +% Reg[EBX].i = 10; # op ModR/M SIB displacement immediate 81 eb 01 00 00 00 # subtract 1 from EBX # ModR/M in binary: 11 (direct mode) 101 (subtract imm32) 011 (dest EBX) @@ -112,7 +112,7 @@ case 0x25: { // and imm32 with EAX //: :(scenario and_imm32_with_mem_at_r32) -% Reg[3].i = 0x60; +% Reg[EBX].i = 0x60; % write_mem_i32(0x60, 0x000000ff); # op ModR/M SIB displacement immediate 81 23 0a 0b 0c 0d # and 0x0d0c0b0a with *EBX @@ -132,7 +132,7 @@ case 4: { //: :(scenario and_imm32_with_r32) -% Reg[3].i = 0xff; +% Reg[EBX].i = 0xff; # op ModR/M SIB displacement immediate 81 e3 0a 0b 0c 0d # and 0x0d0c0b0a with EBX # ModR/M in binary: 11 (direct mode) 100 (and imm32) 011 (dest EBX) @@ -161,7 +161,7 @@ case 0x0d: { // or imm32 with EAX //: :(scenario or_imm32_with_mem_at_r32) -% Reg[3].i = 0x60; +% Reg[EBX].i = 0x60; % write_mem_i32(0x60, 0xd0c0b0a0); # op ModR/M SIB displacement immediate 81 0b 0a 0b 0c 0d # or 0x0d0c0b0a with *EBX @@ -179,7 +179,7 @@ case 1: { } :(scenario or_imm32_with_r32) -% Reg[3].i = 0xd0c0b0a0; +% Reg[EBX].i = 0xd0c0b0a0; # op ModR/M SIB displacement immediate 81 cb 0a 0b 0c 0d # or 0x0d0c0b0a with EBX # ModR/M in binary: 11 (direct mode) 001 (or imm32) 011 (dest EBX) @@ -208,7 +208,7 @@ case 0x35: { // xor imm32 with EAX //: :(scenario xor_imm32_with_mem_at_r32) -% Reg[3].i = 0x60; +% Reg[EBX].i = 0x60; % write_mem_i32(0x60, 0xd0c0b0a0); # op ModR/M SIB displacement immediate 81 33 0a 0b 0c 0d # xor 0x0d0c0b0a with *EBX @@ -226,7 +226,7 @@ case 6: { } :(scenario xor_imm32_with_r32) -% Reg[3].i = 0xd0c0b0a0; +% Reg[EBX].i = 0xd0c0b0a0; # op ModR/M SIB displacement immediate 81 f3 0a 0b 0c 0d # xor 0x0d0c0b0a with EBX # ModR/M in binary: 11 (direct mode) 110 (xor imm32) 011 (dest EBX) @@ -238,7 +238,7 @@ case 6: { //:: compare (cmp) :(scenario compare_imm32_with_eax_greater) -% Reg[0].i = 0x0d0c0b0a; +% Reg[EAX].i = 0x0d0c0b0a; # op ModR/M SIB displacement immediate 3d 07 0b 0c 0d # compare 0x0d0c0b07 with EAX +run: compare EAX and imm32 0x0d0c0b07 @@ -259,14 +259,14 @@ case 0x3d: { // subtract imm32 from EAX } :(scenario compare_imm32_with_eax_lesser) -% Reg[0].i = 0x0d0c0b07; +% Reg[EAX].i = 0x0d0c0b07; # op ModR/M SIB displacement immediate 3d 0a 0b 0c 0d # compare 0x0d0c0b0a with EAX +run: compare EAX and imm32 0x0d0c0b0a +run: SF=1; ZF=0; OF=0 :(scenario compare_imm32_with_eax_equal) -% Reg[0].i = 0x0d0c0b0a; +% Reg[EAX].i = 0x0d0c0b0a; # op ModR/M SIB displacement immediate 3d 0a 0b 0c 0d # compare 0x0d0c0b0a with EAX +run: compare EAX and imm32 0x0d0c0b0a @@ -275,7 +275,7 @@ case 0x3d: { // subtract imm32 from EAX //: :(scenario compare_imm32_with_r32_greater) -% Reg[3].i = 0x0d0c0b0a; +% Reg[EBX].i = 0x0d0c0b0a; # op ModR/M SIB displacement immediate 81 fb 07 0b 0c 0d # compare 0x0d0c0b07 with EBX # ModR/M in binary: 11 (direct mode) 111 (compare imm32) 011 (dest EBX) @@ -296,7 +296,7 @@ case 7: { } :(scenario compare_imm32_with_r32_lesser) -% Reg[3].i = 0x0d0c0b07; +% Reg[EBX].i = 0x0d0c0b07; # op ModR/M SIB displacement immediate 81 fb 0a 0b 0c 0d # compare 0x0d0c0b0a with EBX # ModR/M in binary: 11 (direct mode) 111 (compare imm32) 011 (dest EBX) @@ -305,7 +305,7 @@ case 7: { +run: SF=1; ZF=0; OF=0 :(scenario compare_imm32_with_r32_equal) -% Reg[3].i = 0x0d0c0b0a; +% Reg[EBX].i = 0x0d0c0b0a; # op ModR/M SIB displacement immediate 81 fb 0a 0b 0c 0d # compare 0x0d0c0b0a with EBX # ModR/M in binary: 11 (direct mode) 111 (compare imm32) 011 (dest EBX) @@ -314,7 +314,7 @@ case 7: { +run: SF=0; ZF=1; OF=0 :(scenario compare_imm32_with_mem_at_r32_greater) -% Reg[3].i = 0x60; +% Reg[EBX].i = 0x60; % write_mem_i32(0x60, 0x0d0c0b0a); # op ModR/M SIB displacement immediate 81 3b 07 0b 0c 0d # compare 0x0d0c0b07 with *EBX @@ -324,7 +324,7 @@ case 7: { +run: SF=0; ZF=0; OF=0 :(scenario compare_imm32_with_mem_at_r32_lesser) -% Reg[3].i = 0x60; +% Reg[EBX].i = 0x60; % write_mem_i32(0x60, 0x0d0c0b07); # op ModR/M SIB displacement immediate 81 3b 0a 0b 0c 0d # compare 0x0d0c0b0a with *EBX @@ -334,8 +334,8 @@ case 7: { +run: SF=1; ZF=0; OF=0 :(scenario compare_imm32_with_mem_at_r32_equal) -% Reg[3].i = 0x0d0c0b0a; -% Reg[3].i = 0x60; +% Reg[EBX].i = 0x0d0c0b0a; +% Reg[EBX].i = 0x60; % write_mem_i32(0x60, 0x0d0c0b0a); # op ModR/M SIB displacement immediate 81 3b 0a 0b 0c 0d # compare 0x0d0c0b0a with *EBX @@ -370,7 +370,7 @@ case 0xbf: { // copy imm32 to r32 //: :(scenario copy_imm32_to_mem_at_r32) -% Reg[3].i = 0x60; +% Reg[EBX].i = 0x60; # op ModR/M SIB displacement immediate c7 03 0a 0b 0c 0d # copy 0x0d0c0b0a to *EBX # ModR/M in binary: 00 (indirect mode) 000 (unused) 011 (dest EBX) diff --git a/subx/014index_addressing.cc b/subx/014index_addressing.cc index 6b07436f..fe80de13 100644 --- a/subx/014index_addressing.cc +++ b/subx/014index_addressing.cc @@ -1,8 +1,8 @@ //: operating on memory at the address provided by some register plus optional scale and offset :(scenario add_r32_to_mem_at_r32_with_sib) -% Reg[3].i = 0x10; -% Reg[0].i = 0x60; +% Reg[EBX].i = 0x10; +% Reg[EAX].i = 0x60; % write_mem_i32(0x60, 1); # op ModR/M SIB displacement immediate 01 1c 20 # add EBX to *EAX @@ -45,9 +45,9 @@ uint32_t effective_address_from_sib(uint8_t mod) { } :(scenario add_r32_to_mem_at_base_r32_index_r32) -% Reg[3].i = 0x10; // source -% Reg[0].i = 0x5e; // dest base -% Reg[1].i = 0x2; // dest index +% Reg[EBX].i = 0x10; // source +% Reg[EAX].i = 0x5e; // dest base +% Reg[ECX].i = 0x2; // dest index % write_mem_i32(0x60, 1); # op ModR/M SIB displacement immediate 01 1c 08 # add EBX to *(EAX+ECX) @@ -59,7 +59,7 @@ uint32_t effective_address_from_sib(uint8_t mod) { +run: storing 0x00000011 :(scenario add_r32_to_mem_at_displacement_using_sib) -% Reg[3].i = 0x10; // source +% Reg[EBX].i = 0x10; // source % write_mem_i32(0x60, 1); # op ModR/M SIB displacement immediate 01 1c 25 60 00 00 00 # add EBX to *0x60 @@ -73,9 +73,9 @@ uint32_t effective_address_from_sib(uint8_t mod) { //: :(scenario add_r32_to_mem_at_base_r32_index_r32_plus_disp8) -% Reg[3].i = 0x10; // source -% Reg[0].i = 0x59; // dest base -% Reg[1].i = 0x5; // dest index +% Reg[EBX].i = 0x10; // source +% Reg[EAX].i = 0x59; // dest base +% Reg[ECX].i = 0x5; // dest index % write_mem_i32(0x60, 1); # op ModR/M SIB displacement immediate 01 5c 08 02 # add EBX to *(EAX+ECX+2) @@ -95,9 +95,9 @@ case 4: // exception: mod 0b01 rm 0b100 => incoming SIB (scale-index-base) byte //: :(scenario add_r32_to_mem_at_base_r32_index_r32_plus_disp32) -% Reg[3].i = 0x10; // source -% Reg[0].i = 0x59; // dest base -% Reg[1].i = 0x5; // dest index +% Reg[EBX].i = 0x10; // source +% Reg[EAX].i = 0x59; // dest base +% Reg[ECX].i = 0x5; // dest index % write_mem_i32(0x60, 1); # op ModR/M SIB displacement immediate 01 9c 08 02 00 00 00 # add EBX to *(EAX+ECX+2) |