// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package arch defines architecture-specific information and support functions.
package arch
import (
"cmd/internal/obj"
"cmd/internal/obj/arm"
"cmd/internal/obj/arm64"
"cmd/internal/obj/mips"
"cmd/internal/obj/ppc64"
"cmd/internal/obj/s390x"
"cmd/internal/obj/wasm"
"cmd/internal/obj/x86"
"fmt"
"strings"
)
// Pseudo-registers whose names are the constant name without the leading R.
const (
RFP = -(iota + 1)
RSB
RSP
RPC
)
// Arch wraps the link architecture object with more architecture-specific information.
type Arch struct {
*obj.LinkArch
// Map of instruction names to enumeration.
Instructions map[string]obj.As
// Map of register names to enumeration.
Register map[string]int16
// Table of register prefix names. These are things like R for R(0) and SPR for SPR(268).
RegisterPrefix map[string]bool
// RegisterNumber converts R(10) into arm.REG_R10.
RegisterNumber func(string, int16) (int16, bool)
// Instruction is a jump.
IsJump func(word string) bool
}
// nilRegisterNumber is the register number function for architectures
// that do not accept the R(N) notation. It always returns failure.
func nilRegisterNumber(name string, n int16) (int16, bool) {
return 0, false
}
// Set configures the architecture specified by GOARCH and returns its representation.
// It returns nil if GOARCH is not recognized.
func Set(GOARCH string) *Arch {
switch GOARCH {
case "386":
return archX86(&x86.Link386)
case "amd64":
return archX86(&x86.Linkamd64)
case "amd64p32":
return archX86(&x86.Linkamd64p32)
case "arm":
return archArm()
case "arm64":
return archArm64()
case "mips":
a := archMips()
a.LinkArch = &mips.Linkmips
return a
case "mipsle":
a := archMips()
a.LinkArch = &mips.Linkmipsle
return a
case "mips64":
a := archMips64()
a.LinkArch = &mips.Linkmips64
return a
case "mips64le":
a := archMips64()
a.LinkArch = &mips.Linkmips64le
return a
case "ppc64":
a := archPPC64()
a.LinkArch = &ppc64.Linkppc64
return a
case "ppc64le":
a := archPPC64()
a.LinkArch = &ppc64.Linkppc64le
return a
case "s390x":
a := archS390x()
a.LinkArch = &s390x.Links390x
return a
case "wasm":
return archWasm()
}
return nil
}
func jumpX86(word string) bool {
return word[0] == 'J' || word == "CALL" || strings.HasPrefix(word, "LOOP") || word == "XBEGIN"
}
func jumpWasm(word string) bool {
return word == "JMP" || word == "CALL" || word == "Call" || word == "Br" || word == "BrIf"
}
func archX86(linkArch *obj.LinkArch) *Arch {
register := make(map[string]int16)
// Create maps for easy lookup of instruction names etc.
for i, s := range x86.Register {
register[s] = int16(i + x86.REG_AL)
}
// Pseudo-registers.
register["SB"] = RSB
register["FP"] = RFP
register["PC"] = RPC
// Register prefix not used on this architecture.
instructions := make(map[string]obj.As)
for i, s := range obj.Anames {
instructions[s] = obj.As(i)
}
for i, s := range x86.Anames {
if obj.As(i) >= obj.A_ARCHSPECIFIC {
instructions[s] = obj.As(i) + obj.ABaseAMD64
}
}
// Annoying aliases.
instructions["JA"] = x86.AJHI /* alternate */
instructions["JAE"] = x86.AJCC /* alternate */
instructions["JB"] = x86.AJCS /* alternate */
instructions["JBE"] = x86.AJLS /* alternate */
instructions["JC"] = x86.AJCS /* alternate */
instructions["JCC"] = x86.AJCC /* carry clear (CF = 0) */
instructions["JCS"] = x86.AJCS /* carry set (CF = 1) */
instructions["JE"] = x86.AJEQ /* alternate */
instructions["JEQ"] = x86.AJEQ /* equal (ZF = 1) */
instructions["JG"] = x86.AJGT /* alternate */
instructions["JGE"] = x86.AJGE /* greater than or equal (signed) (SF = OF) */
instructions["JGT"] = x86.AJGT /* greater than (signed) (ZF = 0 && SF = OF) */
instructions["JHI"] = x86.AJHI /* higher (unsigned) (CF = 0 && ZF = 0) */
instructions["JHS"] = x86.AJCC /* alternate */
instructions["JL"] = x86.AJLT /* alternate */
instructions["JLE"] = x86.AJLE /* less than or equal (signed) (ZF = 1 || SF != OF) */
instructions["JLO"] = x86.AJCS /* alternate */
instructions["JLS"] = x86.AJLS /* lower or same (unsigned) (CF = 1 || ZF = 1) */
instructions["JLT"] = x86.AJLT /* less than (signed) (SF != OF) */
instructions["JMI"] = x86.AJMI /* negative (minus) (SF = 1) */
instructions["JNA"] = x86.AJLS /* alternate */
instructions["JNAE"] = x86.AJCS /* alternate */
instructions["JNB"] = x86.AJCC /* alternate */
instructions["JNBE"] = x86.AJHI /* alternate */
instructions["JNC"] = x86.AJCC /* alternate */
instructions["JNE"] = x86.AJNE /* not equal (ZF = 0) */
instructions["JNG"] = x86.AJLE /* alternate */
instructions["JNGE"] = x86.AJLT /* alternate */
instructions["JNL"] = x86.AJGE /* alternate */
instructions["JNLE"] = x86.AJGT /* alternate */
instructions["JNO"] = x86.AJOC /* alternate */
instructions["JNP"] = x86.AJPC /* alternate */
instructions["JNS"] = x86.AJPL /* alternate */
instructions["JNZ"] = x86.AJNE /* alternate */
instructions["JO"] = x86.AJOS /* alternate */
instructions["JOC"] = x86.AJOC /* overflow clear (OF = 0) */
instructions["JOS"] = x86.AJOS /* overflow set (OF = 1) */
instructions["JP"] = x86.AJPS /* alternate */
instructions["JPC"] = x86.AJPC /* parity clear (PF = 0) */
instructions["JPE"] = x86.AJPS /* alternate */
instructions["JPL"] = x86.AJPL /* non-negative (plus) (SF = 0) */
instructions["JPO"] = x86.AJPC /* alternate */
instructions["JPS"] = x86.AJPS /* parity set (PF = 1) */
instructions["JS"] = x86.AJMI /* alternate */
instructions["JZ"] = x86.AJEQ /* alternate */
instructions["MASKMOVDQU"] = x86.AMASKMOVOU
instructions["MOVD"] = x86.AMOVQ
instructions["MOVDQ2Q"] = x86.AMOVQ
instructions["MOVNTDQ"] = x86.AMOVNTO
instructions["MOVOA"] = x86.AMOVO
instructions["PSLLDQ"] = x86.APSLLO
instructions["PSRLDQ"] = x86.APSRLO
instructions["PADDD"] = x86.APADDL
return &Arch{
LinkArch: linkArch,
Instructions: instructions,
Register: register,
RegisterPrefix: nil,
RegisterNumber: nilRegisterNumber,
IsJump: jumpX86,
}
}
func archArm() *Arch {
register := make(map[string]int16)
// Create maps for easy lookup of instruction names etc.
// Note that there is no list of names as there is for x86.
for i := arm.REG_R0; i < arm.REG_SPSR; i++ {
register[obj.Rconv(i)] = int16(i)
}
// Avoid unintentionally clobbering g using R10.
delete(register, "R10")
register["g"] = arm.REG_R10
for i := 0; i < 16; i++ {
register[fmt.Sprintf("C%d", i)] = int16(i)
}
// Pseudo-registers.
register["SB"] = RSB
register["FP"] = RFP
register["PC"] = RPC
register["SP"] = RSP
registerPrefix := map[string]bool{
"F": true,
"R": true,
}
// special operands for DMB/DSB instructions
register["MB_SY"] = arm.REG_MB_SY
register["MB_ST"] = arm.REG_MB_ST
register["MB_ISH"] = arm.REG_MB_ISH
register["MB_ISHST"] = arm.REG_MB_ISHST
register["MB_NSH"] = arm.REG_MB_NSH
register["MB_NSHST"] = arm.REG_MB_NSHST
register["MB_OSH"] = arm.REG_MB_OSH
register["MB_OSHST"] = arm.REG_MB_OSHST
instructions := make(map[string]obj.As)
for i, s := range obj.Anames {
instructions[s] = obj.As(i)
}
for i, s := range arm.Anames {
if obj.As(i) >= obj.A_ARCHSPECIFIC {
instructions[s] = obj.As(i) + obj.ABaseARM
}
}
// Annoying aliases.
instructions["B"] = obj.AJMP
instructions["BL"] = obj.ACALL
// MCR differs from MRC by the way fields of the word are encoded.
// (Details in arm.go). Here we add the instruction so parse will find
// it, but give it an opcode number known only to us.
instructions["MCR"] = aMCR
return &Arch{
LinkArch: &arm.Linkarm,
Instructions: instructions,
Register: register,
RegisterPrefix: registerPrefix,
RegisterNumber: armRegisterNumber,
IsJump: jumpArm,
}
}
func archArm64() *Arch {
register := make(map[string]int16)
// Create maps for easy lookup of instruction names etc.
// Note that there is no list of names as there is for 386 and amd64.
register[obj.Rconv(arm64.REGSP)] = int16(arm64.REGSP)
for i := arm64.REG_R0; i <= arm64.REG_R31; i++ {
register[obj.Rconv(i)] = int16(i)
}
// Rename R18 to R18_PLATFORM to avoid accidental use.
register["R18_PLATFORM"] = register["R18"]
delete(register, "R18")
for i := arm64.REG_F0; i <= arm64.REG_F31; i++ {
register[obj.Rconv(i)] = int16(i)
}
for i := arm64.REG_V0; i <= arm64.REG_V31; i++ {
register[obj.Rconv(i)] = int16(i)
}
register["LR"] = arm64.REGLINK
register["DAIF"] = arm64.REG_DAIF
register["NZCV"] = arm64.REG_NZCV
register["FPSR"] = arm64.REG_FPSR
register["FPCR"] = arm64.REG_FPCR
register["SPSR_EL1"] = arm64.REG_SPSR_EL1
register["ELR_EL1"] = arm64.REG_ELR_EL1
register["SPSR_EL2"] = arm64.REG_SPSR_EL2
register["ELR_EL2"] = arm64.REG_ELR_EL2
register["CurrentEL"] = arm64.REG_CurrentEL
register["SP_EL0"] = arm64.REG_SP_EL0
register["SPSel"] = arm64.REG_SPSel
register["DAIFSet"] = arm64.REG_DAIFSet
register["DAIFClr"] = arm64.REG_DAIFClr
register["DCZID_EL0"] = arm64.REG_DCZID_EL0
register["PLDL1KEEP"] = arm64.REG_PLDL1KEEP
register["PLDL1STRM"] = arm64.REG_PLDL1STRM
register["PLDL2KEEP"] = arm64.REG_PLDL2KEEP
register["PLDL2STRM"] = arm64.REG_PLDL2STRM
register["PLDL3KEEP"] = arm64.REG_PLDL3KEEP
register["PLDL3STRM"] = arm64.REG_PLDL3STRM
register["PLIL1KEEP"] = arm64.REG_PLIL1KEEP
register["PLIL1STRM"] = arm64.REG_PLIL1STRM
register["PLIL2KEEP"] = arm64.REG_PLIL2KEEP
register["PLIL2STRM"] = arm64.REG_PLIL2STRM
register["PLIL3KEEP"] = arm64.REG_PLIL3KEEP
register["PLIL3STRM"] = arm64.REG_PLIL3STRM
register["PSTL1KEEP"] = arm64.REG_PSTL1KEEP
register["PSTL1STRM"] = arm64.REG_PSTL1STRM
register["PSTL2KEEP"] = arm64.REG_PSTL2KEEP
register["PSTL2STRM"] = arm64.REG_PSTL2STRM
register["PSTL3KEEP"] = arm64.REG_PSTL3KEEP
register["PSTL3STRM"] = arm64.REG_PSTL3STRM
// Conditional operators, like EQ, NE, etc.
register["EQ"] = arm64.COND_EQ
register["NE"] = arm64.COND_NE
register["HS"] = arm64.COND_HS
register["CS"] = arm64.COND_HS
register["LO"] = arm64.COND_LO
register["CC"] = arm64.COND_LO
register["MI"] = arm64.COND_MI
register["PL"] = arm64.COND_PL
register["VS"] = arm64.COND_VS
register["VC"] = arm64.COND_VC
register["HI"] = arm64.COND_HI
register["LS"] = arm64.COND_LS
register["GE"] = arm64.COND_GE
register["LT"] = arm64.COND_LT
register["GT"] = arm64.COND_GT
register["LE"] = arm64.COND_LE
register["AL"] = arm64.COND_AL
register["NV"] = arm64.COND_NV
// Pseudo-registers.
register["SB"] = RSB
register["FP"] = RFP
register["PC"] = RPC
register["SP"] = RSP
// Avoid unintentionally clobbering g using R28.
delete(register, "R28")
register["g"] = arm64.REG_R28
registerPrefix := map[string]bool{
"F": true,
"R": true,
"V": true,
}
instructions := make(map[string]obj.As)
for i, s := range obj.Anames {
instructions[s] = obj.As(i)
}
for i, s := range arm64.Anames {
if obj.As(i) >= obj.A_ARCHSPECIFIC {
instructions[s] = obj.As(i) + obj.ABaseARM64
}
}
// Annoying aliases.
instructions["B"] = arm64.AB
instructions["BL"] = arm64.ABL
return &Arch{
LinkArch: &arm64.Linkarm64,
Instructions: instructions,
Register: register,
RegisterPrefix: registerPrefix,
RegisterNumber: arm64RegisterNumber,
IsJump: jumpArm64,
}
}
func archPPC64() *Arch {
register := make(map[string]int16)
// Create maps for easy lookup of instruction names etc.
// Note that there is no list of names as there is for x86.
for i := ppc64.REG_R0; i <= ppc64.REG_R31; i++ {
register[obj.Rconv(i)] = int16(i)
}
for i := ppc64.REG_F0; i <= ppc64.REG_F31; i++ {
register[obj.Rconv(i)] = int16(i)
}
for i := ppc64.REG_V0; i <= ppc64.REG_V31; i++ {
register[obj.Rconv(i)] = int16(i)
}
for i := ppc64.REG_VS0; i <= ppc64.REG_VS63; i++ {
register[obj.Rconv(i)] = int16(i)
}
for i := ppc64.REG_CR0; i <= ppc64.REG_CR7; i++ {
register[obj.Rconv(i)] = int16(i)
}
for i := ppc64.REG_MSR; i <= ppc64.REG_CR; i++ {
register[obj.Rconv(i)] = int16(i)
}
register["CR"] = ppc64.REG_CR
register["XER"] = ppc64.REG_XER
register["LR"] = ppc64.REG_LR
register["CTR"] = ppc64.REG_CTR
register["FPSCR"] = ppc64.REG_FPSCR
register["MSR"] = ppc64.REG_MSR
// Pseudo-registers.
register["SB"] = RSB
register["FP"] = RFP
register["PC"] = RPC
// Avoid unintentionally clobbering g using R30.
delete(register, "R30")
register["g"] = ppc64.REG_R30
registerPrefix := map[string]bool{
"CR": true,
"F": true,
"R": true,
"SPR": true,
}
instructions := make(map[string]obj.As)
for i, s := range obj.Anames {
instructions[s] = obj.As(i)
}
for i, s := range ppc64.Anames {
if obj.As(i) >= obj.A_ARCHSPECIFIC {
instructions[s] = obj.As(i) + obj.ABasePPC64
}
}
// Annoying aliases.
instructions["BR"] = ppc64.ABR
instructions["BL"] = ppc64.ABL
return &Arch{
LinkArch: &ppc64.Linkppc64,
Instructions: instructions,
Register: register,
RegisterPrefix: registerPrefix,
RegisterNumber: ppc64RegisterNumber,
IsJump: jumpPPC64,
}
}
func archMips() *Arch {
register := make(map[string]int16)
// Create maps for easy lookup of instruction names etc.
// Note that there is no list of names as there is for x86.
for i := mips.REG_R0; i <= mips.REG_R31; i++ {
register[obj.Rconv(i)] = int16(i)
}
for i := mips.REG_F0; i <= mips.REG_F31; i++ {
register[obj.Rconv(i)] = int16(i)
}
for i := mips.REG_M0; i <= mips.REG_M31; i++ {
register[obj.Rconv(i)] = int16(i)
}
for i := mips.REG_FCR0; i <= mips.REG_FCR31; i++ {
register[obj.Rconv(i)] = int16(i)
}
register["HI"] = mips.REG_HI
register["LO"] = mips.REG_LO
// Pseudo-registers.
register["SB"] = RSB
register["FP"] = RFP
register["PC"] = RPC
// Avoid unintentionally clobbering g using R30.
delete(register, "R30")
register["g"] = mips.REG_R30
registerPrefix := map[string]bool{
"F": true,
"FCR": true,
"M": true,
"R": true,
}
instructions := make(map[string]obj.As)
for i, s := range obj.Anames {
instructions[s] = obj.As(i)
}
for i, s := range mips.Anames {
if obj.As(i) >= obj.A_ARCHSPECIFIC {
instructions[s] = obj.As(i) + obj.ABaseMIPS
}
}
// Annoying alias.
instructions["JAL"] = mips.AJAL
return &Arch{
LinkArch: &mips.Linkmipsle,
Instructions: instructions,
Register: register,
RegisterPrefix: registerPrefix,
RegisterNumber: mipsRegisterNumber,
IsJump: jumpMIPS,
}
}
func archMips64() *Arch {
register := make(map[string]int16)
// Create maps for easy lookup of instruction names etc.
// Note that there is no list of names as there is for x86.
for i := mips.REG_R0; i <= mips.REG_R31; i++ {
register[obj.Rconv(i)] = int16(i)
}
for i := mips.REG_F0; i <= mips.REG_F31; i++ {
register[obj.Rconv(i)] = int16(i)
}
for i := mips.REG_M0; i <= mips.REG_M31; i++ {
register[obj.Rconv(i)] = int16(i)
}
for i := mips.REG_FCR0; i <= mips.REG_FCR31; i++ {
register[obj.Rconv(i)] = int16(i)
}
register["HI"] = mips.REG_HI
register["LO"] = mips.REG_LO
// Pseudo-registers.
register["SB"] = RSB
register["FP"] = RFP
register["PC"] = RPC
// Avoid unintentionally clobbering g using R30.
delete(register, "R30")
register["g"] = mips.REG_R30
// Avoid unintentionally clobbering RSB using R28.
delete(register, "R28")
register["RSB"] = mips.REG_R28
registerPrefix := map[string]bool{
"F": true,
"FCR": true,
"M": true,
"R": true,
}
instructions := make(map[string]obj.As)
for i, s := range obj.Anames {
instructions[s] = obj.As(i)
}
for i, s := range mips.Anames {
if obj.As(i) >= obj.A_ARCHSPECIFIC {
instructions[s] = obj.As(i) + obj.ABaseMIPS
}
}
// Annoying alias.
instructions["JAL"] = mips.AJAL
return &Arch{
LinkArch: &mips.Linkmips64,
Instructions: instructions,
Register: register,
RegisterPrefix: registerPrefix,
RegisterNumber: mipsRegisterNumber,
IsJump: jumpMIPS,
}
}
func archS390x() *Arch {
register := make(map[string]int16)
// Create maps for easy lookup of instruction names etc.
// Note that there is no list of names as there is for x86.
for i := s390x.REG_R0; i <= s390x.REG_R15; i++ {
register[obj.Rconv(i)] = int16(i)
}
for i := s390x.REG_F0; i <= s390x.REG_F15; i++ {
register[obj.Rconv(i)] = int16(i)
}
for i := s390x.REG_V0; i <= s390x.REG_V31; i++ {
register[obj.Rconv(i)] = int16(i)
}
for i := s390x.REG_AR0; i <= s390x.REG_AR15; i++ {
register[obj.Rconv(i)] = int16(i)
}
register["LR"] = s390x.REG_LR
// Pseudo-registers.
register["SB"] = RSB
register["FP"] = RFP
register["PC"] = RPC
// Avoid unintentionally clobbering g using R13.
delete(register, "R13")
register["g"] = s390x.REG_R13
registerPrefix := map[string]bool{
"AR": true,
"F": true,
"R": true,
}
instructions := make(map[string]obj.As)
for i, s := range obj.Anames {
instructions[s] = obj.As(i)
}
for i, s := range s390x.Anames {
if obj.As(i) >= obj.A_ARCHSPECIFIC {
instructions[s] = obj.As(i) + obj.ABaseS390X
}
}
// Annoying aliases.
instructions["BR"] = s390x.ABR
instructions["BL"] = s390x.ABL
return &Arch{
LinkArch: &s390x.Links390x,
Instructions: instructions,
Register: register,
RegisterPrefix: registerPrefix,
RegisterNumber: s390xRegisterNumber,
IsJump: jumpS390x,
}
}
func archWasm() *Arch {
instructions := make(map[string]obj.As)
for i, s := range obj.Anames {
instructions[s] = obj.As(i)
}
for i, s := range wasm.Anames {
if obj.As(i) >= obj.A_ARCHSPECIFIC {
instructions[s] = obj.As(i) + obj.ABaseWasm
}
}
return &Arch{
LinkArch: &wasm.Linkwasm,
Instructions: instructions,
Register: wasm.Register,
RegisterPrefix: nil,
RegisterNumber: nilRegisterNumber,
IsJump: jumpWasm,
}
}
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