//: jump to 32-bit offset //:: jump :(before "End Initialize Op Names") put_new(Name, "e9", "jump disp32 bytes away (jmp)"); :(scenario jump_disp32) == 0x1 # op ModR/M SIB displacement immediate e9 05 00 00 00 # skip 1 instruction 05 00 00 00 01 05 00 00 00 02 +run: 0x00000001 opcode: e9 +run: jump 5 +run: 0x0000000b opcode: 05 -run: 0x00000006 opcode: 05 :(before "End Single-Byte Opcodes") case 0xe9: { // jump disp32 const int32_t offset = next32(); trace(Callstack_depth+1, "run") << "jump " << offset << end(); EIP += offset; break; } //:: jump if equal/zero :(before "End Initialize Op Names") put_new(Name_0f, "84", "jump disp32 bytes away if equal, if ZF is set (jcc/jz/je)"); :(scenario je_disp32_success) % ZF = true; == 0x1 # op ModR/M SIB displacement immediate 0f 84 05 00 00 00 # skip 1 instruction 05 00 00 00 01 05 00 00 00 02 +run: 0x00000001 opcode: 0f +run: jump 5 +run: 0x0000000c opcode: 05 -run: 0x00000007 opcode: 05 :(before "End Two-Byte Opcodes Starting With 0f") case 0x84: { // jump disp32 if ZF const int32_t offset = next32(); if (ZF) { trace(Callstack_depth+1, "run") << "jump " << NUM(offset) << end(); EIP += offset; } break; } :(scenario je_disp32_fail) % ZF = false; == 0x1 # op ModR/M SIB displacement immediate 0f 84 05 00 00 00 # skip 1 instruction 05 00 00 00 01 05 00 00 00 02 +run: 0x00000001 opcode: 0f +run: 0x00000007 opcode: 05 +run: 0x0000000c opcode: 05 -run: jump 5 //:: jump if not equal/not zero :(before "End Initialize Op Names") put_new(Name_0f, "85", "jump disp32 bytes away if not equal, if ZF is not set (jcc/jnz/jne)"); :(scenario jne_disp32_success) % ZF = false; == 0x1 # op ModR/M SIB displacement immediate 0f 85 05 00 00 00 # skip 1 instruction 05 00 00 00 01 05 00 00 00 02 +run: 0x00000001 opcode: 0f +run: jump 5 +run: 0x0000000c opcode: 05 -run: 0x00000007 opcode: 05 :(before "End Two-Byte Opcodes Starting With 0f") case 0x85: { // jump disp32 unless ZF const int32_t offset = next32(); if (!ZF) { trace(Callstack_depth+1, "run") << "jump " << NUM(offset) << end(); EIP += offset; } break; } :(scenario jne_disp32_fail) % ZF = true; == 0x1 # op ModR/M SIB displacement immediate 0f 85 05 00 00 00 # skip 1 instruction 05 00 00 00 01 05 00 00 00 02 +run: 0x00000001 opcode: 0f +run: 0x00000007 opcode: 05 +run: 0x0000000c opcode: 05 -run: jump 5 //:: jump if greater :(before "End Initialize Op Names") put_new(Name_0f, "8f", "jump disp32 bytes away if greater, if ZF is unset and SF == OF (jcc/jg/jnle)"); :(scenario jg_disp32_success) % ZF = false; % SF = false; % OF = false; == 0x1 # op ModR/M SIB displacement immediate 0f 8f 05 00 00 00 # skip 1 instruction 05 00 00 00 01 05 00 00 00 02 +run: 0x00000001 opcode: 0f +run: jump 5 +run: 0x0000000c opcode: 05 -run: 0x00000007 opcode: 05 :(before "End Two-Byte Opcodes Starting With 0f") case 0x8f: { // jump disp32 if !SF and !ZF const int32_t offset = next32(); if (!ZF && SF == OF) { trace(Callstack_depth+1, "run") << "jump " << NUM(offset) << end(); EIP += offset; } break; } :(scenario jg_disp32_fail) % ZF = false; % SF = true; % OF = false; == 0x1 # op ModR/M SIB displacement immediate 0f 8f 05 00 00 00 # skip 1 instruction 05 00 00 00 01 05 00 00 00 02 +run: 0x00000001 opcode: 0f +run: 0x00000007 opcode: 05 +run: 0x0000000c opcode: 05 -run: jump 5 //:: jump if greater or equal :(before "End Initialize Op Names") put_new(Name_0f, "8d", "jump disp32 bytes away if greater or equal, if SF == OF (jcc/jge/jnl)"); :(scenario jge_disp32_success) % SF = false; % OF = false; == 0x1 # op ModR/M SIB displacement immediate 0f 8d 05 00 00 00 # skip 1 instruction 05 00 00 00 01 05 00 00 00 02 +run: 0x00000001 opcode: 0f +run: jump 5 +run: 0x0000000c opcode: 05 -run: 0x00000007 opcode: 05 :(before "End Two-Byte Opcodes Starting With 0f") case 0x8d: { // jump disp32 if !SF const int32_t offset = next32(); if (SF == OF) { trace(Callstack_depth+1, "run") << "jump " << NUM(offset) << end(); EIP += offset; } break; } :(scenario jge_disp32_fail) % SF = true; % OF = false; == 0x1 # op ModR/M SIB displacement immediate 0f 8d 05 00 00 00 # skip 1 instruction 05 00 00 00 01 05 00 00 00 02 +run: 0x00000001 opcode: 0f +run: 0x00000007 opcode: 05 +run: 0x0000000c opcode: 05 -run: jump 5 //:: jump if lesser :(before "End Initialize Op Names") put_new(Name_0f, "8c", "jump disp32 bytes away if lesser, if SF != OF (jcc/jl/jnge)"); :(scenario jl_disp32_success) % ZF = false; % SF = true; % OF = false; == 0x1 # op ModR/M SIB displacement immediate 0f 8c 05 00 00 00 # skip 1 instruction 05 00 00 00 01 05 00 00 00 02 +run: 0x00000001 opcode: 0f +run: jump 5 +run: 0x0000000c opcode: 05 -run: 0x00000007 opcode: 05 :(before "End Two-Byte Opcodes Starting With 0f") case 0x8c: { // jump disp32 if SF and !ZF const int32_t offset = next32(); if (SF != OF) { trace(Callstack_depth+1, "run") << "jump " << NUM(offset) << end(); EIP += offset; } break; } :(scenario jl_disp32_fail) % ZF = false; % SF = false; % OF = false; == 0x1 # op ModR/M SIB displacement immediate 0f 8c 05 00 00 00 # skip 1 instruction 05 00 00 00 01 05 00 00 00 02 +run: 0x00000001 opcode: 0f +run: 0x00000007 opcode: 05 +run: 0x0000000c opcode: 05 -run: jump 5 //:: jump if lesser or equal :(before "End Initialize Op Names") put_new(Name_0f, "8e", "jump disp32 bytes away if lesser or equal, if ZF is set or SF != OF (jcc/jle/jng)"); :(scenario jle_disp32_equal) % ZF = true; % SF = false; % OF = false; == 0x1 # op ModR/M SIB displacement immediate 0f 8e 05 00 00 00 # skip 1 instruction 05 00 00 00 01 05 00 00 00 02 +run: 0x00000001 opcode: 0f +run: jump 5 +run: 0x0000000c opcode: 05 -run: 0x00000007 opcode: 05 :(scenario jle_disp32_lesser) % ZF = false; % SF = true; % OF = false; == 0x1 # op ModR/M SIB displacement immediate 0f 8e 05 00 00 00 # skip 1 instruction 05 00 00 00 01 05 00 00 00 02 +run: 0x00000001 opcode: 0f +run: jump 5 +run: 0x0000000c opcode: 05 -run: 0x00000007 opcode: 05 :(before "End Two-Byte Opcodes Starting With 0f") case 0x8e: { // jump disp32 if SF or ZF const int32_t offset = next32(); if (ZF || SF != OF) { trace(Callstack_depth+1, "run") << "jump " << NUM(offset) << end(); EIP += offset; } break; } :(scenario jle_disp32_greater) % ZF = false; % SF = false; % OF = false; == 0x1 # op ModR/M SIB displacement immediate 0f 8e 05 00 00 00 # skip 1 instruction 05 00 00 00 01 05 00 00 00 02 +run: 0x00000001 opcode: 0f +run: 0x00000007 opcode: 05 +run: 0x0000000c opcode: 05 -run: jump 5