diff options
Diffstat (limited to 'subx/018jump_disp32.cc')
| -rw-r--r-- | subx/018jump_disp32.cc | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/subx/018jump_disp32.cc b/subx/018jump_disp32.cc new file mode 100644 index 00000000..fd0bc33d --- /dev/null +++ b/subx/018jump_disp32.cc @@ -0,0 +1,287 @@ +//: 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: inst: 0x00000001 ++run: jump 5 ++run: inst: 0x0000000b +-run: inst: 0x00000006 + +:(before "End Single-Byte Opcodes") +case 0xe9: { // jump disp32 + const int32_t offset = next32(); + trace(90, "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: inst: 0x00000001 ++run: jump 5 ++run: inst: 0x0000000c +-run: inst: 0x00000007 + +:(before "End Two-Byte Opcodes Starting With 0f") +case 0x84: { // jump disp32 if ZF + const int32_t offset = next32(); + if (ZF) { + trace(90, "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: inst: 0x00000001 ++run: inst: 0x00000007 ++run: inst: 0x0000000c +-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: inst: 0x00000001 ++run: jump 5 ++run: inst: 0x0000000c +-run: inst: 0x00000007 + +:(before "End Two-Byte Opcodes Starting With 0f") +case 0x85: { // jump disp32 unless ZF + const int32_t offset = next32(); + if (!ZF) { + trace(90, "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: inst: 0x00000001 ++run: inst: 0x00000007 ++run: inst: 0x0000000c +-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: inst: 0x00000001 ++run: jump 5 ++run: inst: 0x0000000c +-run: inst: 0x00000007 + +:(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(90, "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: inst: 0x00000001 ++run: inst: 0x00000007 ++run: inst: 0x0000000c +-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: inst: 0x00000001 ++run: jump 5 ++run: inst: 0x0000000c +-run: inst: 0x00000007 + +:(before "End Two-Byte Opcodes Starting With 0f") +case 0x8d: { // jump disp32 if !SF + const int32_t offset = next32(); + if (SF == OF) { + trace(90, "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: inst: 0x00000001 ++run: inst: 0x00000007 ++run: inst: 0x0000000c +-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: inst: 0x00000001 ++run: jump 5 ++run: inst: 0x0000000c +-run: inst: 0x00000007 + +:(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(90, "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: inst: 0x00000001 ++run: inst: 0x00000007 ++run: inst: 0x0000000c +-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: inst: 0x00000001 ++run: jump 5 ++run: inst: 0x0000000c +-run: inst: 0x00000007 + +:(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: inst: 0x00000001 ++run: jump 5 ++run: inst: 0x0000000c +-run: inst: 0x00000007 + +:(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(90, "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: inst: 0x00000001 ++run: inst: 0x00000007 ++run: inst: 0x0000000c +-run: jump 5 |