This is a higher level API for encoding instructions.
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static XED_INLINE xed_encoder_operand_t | xed_seg0 (xed_reg_enum_t seg0) |
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static XED_INLINE xed_encoder_operand_t | xed_seg1 (xed_reg_enum_t seg1) |
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static XED_INLINE xed_encoder_operand_t | xed_mem_b (xed_reg_enum_t base, xed_uint_t width_bits) |
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static XED_INLINE xed_encoder_operand_t | xed_mem_bd (xed_reg_enum_t base, xed_enc_displacement_t disp, xed_uint_t width_bits) |
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static XED_INLINE xed_encoder_operand_t | xed_mem_bisd (xed_reg_enum_t base, xed_reg_enum_t index, xed_uint_t scale, xed_enc_displacement_t disp, xed_uint_t width_bits) |
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static XED_INLINE xed_encoder_operand_t | xed_mem_gb (xed_reg_enum_t seg, xed_reg_enum_t base, xed_uint_t width_bits) |
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static XED_INLINE xed_encoder_operand_t | xed_mem_gbd (xed_reg_enum_t seg, xed_reg_enum_t base, xed_enc_displacement_t disp, xed_uint_t width_bits) |
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static XED_INLINE xed_encoder_operand_t | xed_mem_gd (xed_reg_enum_t seg, xed_enc_displacement_t disp, xed_uint_t width_bits) |
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static XED_INLINE xed_encoder_operand_t | xed_mem_gbisd (xed_reg_enum_t seg, xed_reg_enum_t base, xed_reg_enum_t index, xed_uint_t scale, xed_enc_displacement_t disp, xed_uint_t width_bits) |
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static XED_INLINE void | xed_inst0 (xed_encoder_instruction_t *inst, xed_state_t mode, xed_iclass_enum_t iclass, xed_uint_t effective_operand_width) |
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static XED_INLINE void | xed_inst1 (xed_encoder_instruction_t *inst, xed_state_t mode, xed_iclass_enum_t iclass, xed_uint_t effective_operand_width, xed_encoder_operand_t op0) |
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static XED_INLINE void | xed_inst2 (xed_encoder_instruction_t *inst, xed_state_t mode, xed_iclass_enum_t iclass, xed_uint_t effective_operand_width, xed_encoder_operand_t op0, xed_encoder_operand_t op1) |
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static XED_INLINE void | xed_inst3 (xed_encoder_instruction_t *inst, xed_state_t mode, xed_iclass_enum_t iclass, xed_uint_t effective_operand_width, xed_encoder_operand_t op0, xed_encoder_operand_t op1, xed_encoder_operand_t op2) |
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static XED_INLINE void | xed_inst4 (xed_encoder_instruction_t *inst, xed_state_t mode, xed_iclass_enum_t iclass, xed_uint_t effective_operand_width, xed_encoder_operand_t op0, xed_encoder_operand_t op1, xed_encoder_operand_t op2, xed_encoder_operand_t op3) |
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static XED_INLINE void | xed_inst5 (xed_encoder_instruction_t *inst, xed_state_t mode, xed_iclass_enum_t iclass, xed_uint_t effective_operand_width, xed_encoder_operand_t op0, xed_encoder_operand_t op1, xed_encoder_operand_t op2, xed_encoder_operand_t op3, xed_encoder_operand_t op4) |
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static XED_INLINE void | xed_inst (xed_encoder_instruction_t *inst, xed_state_t mode, xed_iclass_enum_t iclass, xed_uint_t effective_operand_width, xed_uint_t number_of_operands, const xed_encoder_operand_t *operand_array) |
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This is a higher level API for encoding instructions.
A full example is present in examples/xed-ex5-enc.c
In the following example we create one instructions template that can be passed to the encoder.
@code
xed_encoder_instruction_t x; xed_encoder_request_t enc_req; xed_state_t dstate;
dstate.mmode=XED_MACHINE_MODE_LEGACY_32; dstate.stack_addr_width=XED_ADDRESS_WIDTH_32b;
xed_inst2(&x, dstate, XED_ICLASS_ADD, 0, xreg(XED_REG_EAX), xmem_bd(XED_REG_EDX, xdisp(0x11223344, 32), 32));
xed_encoder_request_zero_set_mode(&enc_req, &dstate); convert_ok = xed_convert_to_encoder_request(&enc_req, &x); if (!convert_ok) { fprintf(stderr,"conversion to encode request failed\n"); continue; } xed_error = xed_encode(&enc_req, itext, ilen, &olen);
The high-level encoder interface allows passing the effective operand width for the xed_inst*() function as 0 (zero) when the effective operand width is the default.
The default width in 16b mode is 16b. The default width in 32b or 64b modes is 32b. So if you do a 16b operation in 32b/64b mode, you must set the effective operand width. If you do a 64b operation in 64b mode, you must set it (the default is 32). Or if you do a more rare 32b operation in 16b mode you must also set it.
When all the operands are "suppressed" operands, then the effective operand width must be supplied for nondefault operation widths.
◆ xed_absbr()
an absolute branch displacement operand
- Parameters
-
brdisp | The branch displacement |
width_bits | The width of the displacement in bits. |
- Returns
- xed_encoder_operand_t An operand.
◆ xed_addr()
This is to specify effective address size different than the default. For things with base or index regs, XED picks it up from the registers. But for things that have implicit memops, or no base or index reg, we must allow the user to set the address width directly.
- Parameters
-
◆ xed_convert_to_encoder_request()
◆ xed_disp()
a memory displacement (not for branches)
- Parameters
-
displacement | The value of the displacement |
displacement_bits | The width of the displacement in bits. Typically 8 or 32. |
- Returns
- xed_enc_displacement_t
◆ xed_imm0()
a first immediate operand (known as IMM0)
- Parameters
-
v | An immdediate operand. |
width_bits | The immediate width in bits. |
- Returns
- xed_encoder_operand_t An operand.
◆ xed_imm1()
The 2nd immediate operand (known as IMM1) for rare instructions that require it.
- Parameters
-
v | The 2nd immdediate (byte-width) operand |
- Returns
- xed_encoder_operand_t An operand.
◆ xed_inst()
instruction with an array of operands. The maximum number is XED_ENCODER_OPERANDS_MAX. The array's contents are copied.
- Parameters
-
◆ xed_inst0()
instruction with no operands
- Parameters
-
◆ xed_inst1()
instruction with one operand
- Parameters
-
◆ xed_inst2()
instruction with two operands
- Parameters
-
inst | The xed_encoder_instruction_t to be filled in |
mode | The xed_state_t including the machine mode and stack address width. |
iclass | The xed_iclass_enum_t |
effective_operand_width | in bits |
op0 | the 1st operand |
op1 | the 2nd operand |
◆ xed_inst3()
instruction with three operands
- Parameters
-
inst | The xed_encoder_instruction_t to be filled in |
mode | The xed_state_t including the machine mode and stack address width. |
iclass | The xed_iclass_enum_t |
effective_operand_width | in bits |
op0 | the 1st operand |
op1 | the 2nd operand |
op2 | the 3rd operand |
◆ xed_inst4()
instruction with four operands
- Parameters
-
inst | The xed_encoder_instruction_t to be filled in |
mode | The xed_state_t including the machine mode and stack address width. |
iclass | The xed_iclass_enum_t |
effective_operand_width | in bits |
op0 | the 1st operand |
op1 | the 2nd operand |
op2 | the 3rd operand |
op3 | the 4th operand |
◆ xed_inst5()
instruction with five operands
- Parameters
-
inst | The xed_encoder_instruction_t to be filled in |
mode | The xed_state_t including the machine mode and stack address width. |
iclass | The xed_iclass_enum_t |
effective_operand_width | in bits |
op0 | the 1st operand |
op1 | the 2nd operand |
op2 | the 3rd operand |
op3 | the 4th operand |
op4 | the 5th operand |
◆ xed_mem_b()
memory operand - base only
- Parameters
-
base | The base register |
width_bits | The length of the memory reference in bits. |
- Returns
- xed_encoder_operand_t An operand.
◆ xed_mem_bd()
memory operand - base and displacement only
- Parameters
-
base | The base register |
disp | The displacement |
width_bits | The length of the memory reference in bits. |
- Returns
- xed_encoder_operand_t An operand.
◆ xed_mem_bisd()
memory operand - base, index, scale, displacement
- Parameters
-
base | The base register |
index | The index register |
scale | The scale for the index register value |
disp | The displacement |
width_bits | The length of the memory reference in bits. |
- Returns
- xed_encoder_operand_t An operand.
◆ xed_mem_gb()
memory operand - segment and base only
- Parameters
-
seg | The segment override register |
base | The base register |
width_bits | The length of the memory reference in bits. |
- Returns
- xed_encoder_operand_t An operand.
◆ xed_mem_gbd()
memory operand - segment, base and displacement only
- Parameters
-
seg | The segment override register |
base | The base register |
disp | The displacement |
width_bits | The length of the memory reference in bits. |
- Returns
- xed_encoder_operand_t An operand.
◆ xed_mem_gbisd()
memory operand - segment, base, index, scale, and displacement
- Parameters
-
seg | The segment override register |
base | The base register |
index | The index register |
scale | The scale for the index register value |
disp | The displacement |
width_bits | The length of the memory reference in bits. |
- Returns
- xed_encoder_operand_t An operand.
◆ xed_mem_gd()
memory operand - segment and displacement only
- Parameters
-
seg | The segment override register |
disp | The displacement |
width_bits | The length of the memory reference in bits. |
- Returns
- xed_encoder_operand_t An operand.
◆ xed_other()
an operand storage field name and value
◆ xed_ptr()
a relative displacement for a PTR operand – the subsequent imm0 holds the 16b selector
- Parameters
-
brdisp | The displacement for a far pointer operand |
width_bits | The width of the far pointr displacement in bits. |
- Returns
- xed_encoder_operand_t An operand.
◆ xed_reg()
◆ xed_relbr()
a relative branch displacement operand
- Parameters
-
brdisp | The branch displacement |
width_bits | The width of the displacement in bits. Typically 8 or 32. |
- Returns
- xed_encoder_operand_t An operand.
◆ xed_rep()
To add a REP (0xF3) prefix.
- Parameters
-
◆ xed_repne()
To add a REPNE (0xF2) prefix.
- Parameters
-
◆ xed_seg0()
seg reg override for implicit suppressed memory ops
◆ xed_seg1()
seg reg override for implicit suppressed memory ops
◆ xed_simm0()
an 32b signed immediate operand
- Parameters
-
v | An signed immdediate operand. |
width_bits | The immediate width in bits. |
- Returns
- xed_encoder_operand_t An operand.