obj

package
v0.0.0-...-79a3b56 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Oct 22, 2015 License: BSD-3-Clause Imports: 15 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	FmtWidth = 1 << iota
	FmtLeft
	FmtSharp
	FmtSign
	FmtUnsigned
	FmtShort
	FmtLong
	FmtComma
	FmtByte
)
View Source 
const (
	PCDATA_StackMapIndex       = 0
	FUNCDATA_ArgsPointerMaps   = 0
	FUNCDATA_LocalsPointerMaps = 1
	ArgsSizeUnknown            = -0x80000000
)

ArgsSizeUnknown is set in Func.argsize to mark all functions whose argument size is unknown (C vararg functions, and assembly code without an explicit specification). This value is generated by the compiler, assembler, or linker.

View Source 
const (
	NAME_NONE = 0 + iota
	NAME_EXTERN
	NAME_STATIC
	NAME_AUTO
	NAME_PARAM
	// A reference to name@GOT(SB) is a reference to the entry in the global offset
	// table for 'name'.
	NAME_GOTREF
)
View Source 
const (
	TYPE_BRANCH = 5 + iota
	TYPE_TEXTSIZE
	TYPE_MEM
	TYPE_CONST
	TYPE_FCONST
	TYPE_SCONST
	TYPE_REG
	TYPE_ADDR
	TYPE_SHIFT
	TYPE_REGREG
	TYPE_REGREG2
	TYPE_INDIR
	TYPE_REGLIST
)
View Source 
const (
	AXXX = 0 + iota
	ACALL
	ACHECKNIL
	ADATA
	ADUFFCOPY
	ADUFFZERO
	AEND
	AFUNCDATA
	AGLOBL
	AJMP
	ANOP
	APCDATA
	ARET
	ATEXT
	ATYPE
	AUNDEF
	AUSEFIELD
	AVARDEF
	AVARKILL
	A_ARCHSPECIFIC
)

Prog.as opcodes. These are the portable opcodes, common to all architectures. Each architecture defines many more arch-specific opcodes, with values starting at A_ARCHSPECIFIC. Each architecture adds an offset to this so each machine has distinct space for its instructions. The offset is a power of two so it can be masked to return to origin zero. See the definitions of ABase386 etc.

View Source 
const (
	Sxxx = iota
	STEXT
	SELFRXSECT

	STYPE
	SSTRING
	SGOSTRING
	SGOFUNC
	SGCBITS
	SRODATA
	SFUNCTAB

	// Types STYPE-SFUNCTAB above are written to the .rodata section by default.
	// When linking a shared object, some conceptually "read only" types need to
	// be written to by relocations and putting them in a section called
	// ".rodata" interacts poorly with the system linkers. The GNU linkers
	// support this situation by arranging for sections of the name
	// ".data.rel.ro.XXX" to be mprotected read only by the dynamic linker after
	// relocations have applied, so when the Go linker is creating a shared
	// object it checks all objects of the above types and bumps any object that
	// has a relocation to it to the corresponding type below, which are then
	// written to sections with appropriate magic names.
	STYPERELRO
	SSTRINGRELRO
	SGOSTRINGRELRO
	SGOFUNCRELRO
	SGCBITSRELRO
	SRODATARELRO
	SFUNCTABRELRO

	STYPELINK
	SSYMTAB
	SPCLNTAB
	SELFROSECT
	SMACHOPLT
	SELFSECT
	SMACHO
	SMACHOGOT
	SWINDOWS
	SELFGOT
	SNOPTRDATA
	SINITARR
	SDATA
	SBSS
	SNOPTRBSS
	STLSBSS
	SXREF
	SMACHOSYMSTR
	SMACHOSYMTAB
	SMACHOINDIRECTPLT
	SMACHOINDIRECTGOT
	SFILE
	SFILEPATH
	SCONST
	SDYNIMPORT
	SHOSTOBJ
	SSUB       = 1 << 8
	SMASK      = SSUB - 1
	SHIDDEN    = 1 << 9
	SCONTAINER = 1 << 10 // has a sub-symbol
)

LSym.type

View Source 
const (
	R_ADDR = 1 + iota
	R_ADDRPOWER
	R_ADDRARM64
	R_SIZE
	R_CALL
	R_CALLARM
	R_CALLARM64
	R_CALLIND
	R_CALLPOWER
	R_CONST
	R_PCREL
	// R_TLS_LE, used on 386, amd64, and ARM, resolves to the offset of the
	// thread-local symbol from the thread local base and is used to implement the
	// "local exec" model for tls access (r.Sym is not set on intel platforms but is
	// set to a TLS symbol -- runtime.tlsg -- in the linker when externally linking).
	R_TLS_LE
	// R_TLS_IE, used 386, amd64, and ARM resolves to the PC-relative offset to a GOT
	// slot containing the offset from the thread-local symbol from the thread local
	// base and is used to implemented the "initial exec" model for tls access (r.Sym
	// is not set on intel platforms but is set to a TLS symbol -- runtime.tlsg -- in
	// the linker when externally linking).
	R_TLS_IE
	R_GOTOFF
	R_PLT0
	R_PLT1
	R_PLT2
	R_USEFIELD
	R_POWER_TOC
	R_GOTPCREL
)

Reloc.type

View Source 
const (
	A_AUTO = 1 + iota
	A_PARAM
)

Auto.name

View Source 
const (
	Hunknown = 0 + iota
	Hdarwin
	Hdragonfly
	Helf
	Hfreebsd
	Hlinux
	Hnacl
	Hnetbsd
	Hopenbsd
	Hplan9
	Hsolaris
	Hwindows
)

executable header types

View Source 
const (
	STACKSYSTEM = 0
	StackSystem = STACKSYSTEM
	StackBig    = 4096
	StackGuard  = 640*stackGuardMultiplier + StackSystem
	StackSmall  = 128
	StackLimit  = StackGuard - StackSystem - StackSmall
)
View Source 
const (
	// Don't profile the marked routine.
	//
	// Deprecated: Not implemented, do not use.
	NOPROF = 1

	// It is ok for the linker to get multiple of these symbols.  It will
	// pick one of the duplicates to use.
	DUPOK = 2

	// Don't insert stack check preamble.
	NOSPLIT = 4

	// Put this data in a read-only section.
	RODATA = 8

	// This data contains no pointers.
	NOPTR = 16

	// This is a wrapper function and should not count as disabling 'recover'.
	WRAPPER = 32

	// This function uses its incoming context register.
	NEEDCTXT = 64

	// When passed to ggloblsym, causes Local to be set to true on the LSym it creates.
	LOCAL = 128

	// Allocate a word of thread local storage and store the offset from the
	// thread local base to the thread local storage in this variable.
	TLSBSS = 256

	// Do not insert instructions to allocate a stack frame for this function.
	// Only valid on functions that declare a frame size of 0.
	// TODO(mwhudson): only implemented for ppc64x at present.
	NOFRAME = 512
)
View Source 
const (
	KindBool = 1 + iota
	KindInt
	KindInt8
	KindInt16
	KindInt32
	KindInt64
	KindUint
	KindUint8
	KindUint16
	KindUint32
	KindUint64
	KindUintptr
	KindFloat32
	KindFloat64
	KindComplex64
	KindComplex128
	KindArray
	KindChan
	KindFunc
	KindInterface
	KindMap
	KindPtr
	KindSlice
	KindString
	KindStruct
	KindUnsafePointer
	KindDirectIface = 1 << 5
	KindGCProg      = 1 << 6
	KindNoPointers  = 1 << 7
	KindMask        = (1 << 5) - 1
)
View Source 
const (
	C_SCOND     = (1 << 4) - 1
	C_SBIT      = 1 << 4
	C_PBIT      = 1 << 5
	C_WBIT      = 1 << 6
	C_FBIT      = 1 << 7
	C_UBIT      = 1 << 7
	C_SCOND_XOR = 14
)

ARM scond byte

View Source 
const (
	// Because of masking operations in the encodings, each register
	// space should start at 0 modulo some power of 2.
	RBase386   = 1 * 1024
	RBaseAMD64 = 2 * 1024
	RBaseARM   = 3 * 1024
	RBasePPC64 = 4 * 1024 // range [4k, 8k)
	RBaseARM64 = 8 * 1024 // range [8k, 12k)
)
View Source 
const (
	ABase386 = (1 + iota) << 12
	ABaseARM
	ABaseAMD64
	ABasePPC64
	ABaseARM64
	AMask = 1<<12 - 1 // AND with this to use the opcode as an array index.
)
View Source 
const Beof = -1
View Source 
const (
	HistVersion = 1
)

symbol version, incremented each time a file is loaded. version==1 is reserved for savehist.

View Source 
const (
	LOG = 5
)
View Source 
const REG_NONE = 0
View Source 
const (
	StackPreempt = -1314 // 0xfff...fade
)
View Source 
const (
	TYPE_NONE = 0
)

Variables

View Source 
var (
	Framepointer_enabled int
	Fieldtrack_enabled   int
)
View Source 
var Anames = []string{
	"XXX",
	"CALL",
	"CHECKNIL",
	"DATA",
	"DUFFCOPY",
	"DUFFZERO",
	"END",
	"FUNCDATA",
	"GLOBL",
	"JMP",
	"NOP",
	"PCDATA",
	"RET",
	"TEXT",
	"TYPE",
	"UNDEF",
	"USEFIELD",
	"VARDEF",
	"VARKILL",
}

Functions

func Aconv 

func Aconv(a int) string

func Bgetc 

func Bgetc(b *Biobuf) int

func Bgetrune 

func Bgetrune(b *Biobuf) int

func Blinelen 

func Blinelen(b *Biobuf) int

func Boffset 

func Boffset(b *Biobuf) int64

func Bool2int 

func Bool2int(b bool) int

func Bputc 

func Bputc(b *Biobuf, c byte)

func Brdline 

func Brdline(b *Biobuf, delim int) string

func Brdstr 

func Brdstr(b *Biobuf, delim int, cut int) string

func Bread 

func Bread(b *Biobuf, p []byte) int

func Bseek 

func Bseek(b *Biobuf, offset int64, whence int) int64

func Bterm 

func Bterm(b *Biobuf) error

func Bungetrune 

func Bungetrune(b *Biobuf)

func Bwritestring 

func Bwritestring(b *Biobuf, p string) (int, error)

func CConv 

func CConv(s uint8) string

CConv formats ARM condition codes.

func Cputime 

func Cputime() float64

func Dconv 

func Dconv(p *Prog, a *Addr) string

func Expstring 

func Expstring() string

func Flagcount 

func Flagcount(name, usage string, val *int)

func Flagfn0 

func Flagfn0(name, usage string, f func())

func Flagfn1 

func Flagfn1(name, usage string, f func(string))

func Flagfn2 

func Flagfn2(string, string, func(string, string))

func Flagint32 

func Flagint32(name, usage string, val *int32)

func Flagint64 

func Flagint64(name, usage string, val *int64)

func Flagparse 

func Flagparse(usage func())

func Flagprint 

func Flagprint(fd int)

func Flagstr 

func Flagstr(name, usage string, val *string)

func Getcallerpc 

func Getcallerpc(interface{}) uintptr

func Getgo386 

func Getgo386() string

func Getgoarch 

func Getgoarch() string

func Getgoarm 

func Getgoarm() int32

func Getgoextlinkenabled 

func Getgoextlinkenabled() string

func Getgoos 

func Getgoos() string

func Getgoroot 

func Getgoroot() string

func Getgoversion 

func Getgoversion() string

func Headstr 

func Headstr(v int) string

func Linkprfile 

func Linkprfile(ctxt *Link, line int)

func Linksymfmt 

func Linksymfmt(s *LSym) string

func Mconv 

func Mconv(a *Addr) string

func Nocache 

func Nocache(p *Prog)

func Nopout 

func Nopout(p *Prog)

func Rconv 

func Rconv(reg int) string

func RegisterOpcode 

func RegisterOpcode(lo int, Anames []string)

RegisterOpcode binds a list of instruction names to a given instruction number range.

func RegisterRegister 

func RegisterRegister(lo, hi int, Rconv func(int) string)

RegisterRegister binds a pretty-printer (Rconv) for register numbers to a given register number range. Lo is inclusive, hi exclusive (valid registers are lo through hi-1).

func Setuintxx 

func Setuintxx(ctxt *Link, s *LSym, off int64, v uint64, wid int64) int64

func Symgrow 

func Symgrow(ctxt *Link, s *LSym, lsiz int64)

func Writeobjdirect 

func Writeobjdirect(ctxt *Link, b *Biobuf)

The Go and C compilers, and the assembler, call writeobj to write out a Go object file. The linker does not call this; the linker does not write out object files.

Types

type Addr 

type Addr struct {
	Type   int16
	Reg    int16
	Index  int16
	Scale  int16 // Sometimes holds a register.
	Name   int8
	Class  int8
	Etype  uint8
	Offset int64
	Width  int64
	Sym    *LSym
	Gotype *LSym

	// argument value:
	//	for TYPE_SCONST, a string
	//	for TYPE_FCONST, a float64
	//	for TYPE_BRANCH, a *Prog (optional)
	//	for TYPE_TEXTSIZE, an int32 (optional)
	Val interface{}

	Node interface{} // for use by compiler
}

An Addr is an argument to an instruction. The general forms and their encodings are: 

sym±offset(symkind)(reg)(index*scale)
	Memory reference at address &sym(symkind) + offset + reg + index*scale.
	Any of sym(symkind), ±offset, (reg), (index*scale), and *scale can be omitted.
	If (reg) and *scale are both omitted, the resulting expression (index) is parsed as (reg).
	To force a parsing as index*scale, write (index*1).
	Encoding:
		type = TYPE_MEM
		name = symkind (NAME_AUTO, ...) or 0 (NAME_NONE)
		sym = sym
		offset = ±offset
		reg = reg (REG_*)
		index = index (REG_*)
		scale = scale (1, 2, 4, 8)

$<mem>
	Effective address of memory reference <mem>, defined above.
	Encoding: same as memory reference, but type = TYPE_ADDR.

$<±integer value>
	This is a special case of $<mem>, in which only ±offset is present.
	It has a separate type for easy recognition.
	Encoding:
		type = TYPE_CONST
		offset = ±integer value

*<mem>
	Indirect reference through memory reference <mem>, defined above.
	Only used on x86 for CALL/JMP *sym(SB), which calls/jumps to a function
	pointer stored in the data word sym(SB), not a function named sym(SB).
	Encoding: same as above, but type = TYPE_INDIR.

$*$<mem>
	No longer used.
	On machines with actual SB registers, $*$<mem> forced the
	instruction encoding to use a full 32-bit constant, never a
	reference relative to SB.

$<floating point literal>
	Floating point constant value.
	Encoding:
		type = TYPE_FCONST
		val = floating point value

$<string literal, up to 8 chars>
	String literal value (raw bytes used for DATA instruction).
	Encoding:
		type = TYPE_SCONST
		val = string

<register name>
	Any register: integer, floating point, control, segment, and so on.
	If looking for specific register kind, must check type and reg value range.
	Encoding:
		type = TYPE_REG
		reg = reg (REG_*)

x(PC)
	Encoding:
		type = TYPE_BRANCH
		val = Prog* reference OR ELSE offset = target pc (branch takes priority)

$±x-±y
	Final argument to TEXT, specifying local frame size x and argument size y.
	In this form, x and y are integer literals only, not arbitrary expressions.
	This avoids parsing ambiguities due to the use of - as a separator.
	The ± are optional.
	If the final argument to TEXT omits the -±y, the encoding should still
	use TYPE_TEXTSIZE (not TYPE_CONST), with u.argsize = ArgsSizeUnknown.
	Encoding:
		type = TYPE_TEXTSIZE
		offset = x
		val = int32(y)

reg<<shift, reg>>shift, reg->shift, reg@>shift
	Shifted register value, for ARM.
	In this form, reg must be a register and shift can be a register or an integer constant.
	Encoding:
		type = TYPE_SHIFT
		offset = (reg&15) | shifttype<<5 | count
		shifttype = 0, 1, 2, 3 for <<, >>, ->, @>
		count = (reg&15)<<8 | 1<<4 for a register shift count, (n&31)<<7 for an integer constant.

(reg, reg)
	A destination register pair. When used as the last argument of an instruction,
	this form makes clear that both registers are destinations.
	Encoding:
		type = TYPE_REGREG
		reg = first register
		offset = second register

[reg, reg, reg-reg]
	Register list for ARM.
	Encoding:
		type = TYPE_REGLIST
		offset = bit mask of registers in list; R0 is low bit.

reg, reg
	Register pair for ARM.
	TYPE_REGREG2

(reg+reg)
	Register pair for PPC64.
	Encoding:
		type = TYPE_MEM
		reg = first register
		index = second register
		scale = 1

type Auto 

type Auto struct {
	Asym    *LSym
	Link    *Auto
	Aoffset int32
	Name    int16
	Gotype  *LSym
}

type Biobuf 

type Biobuf struct {
	// contains filtered or unexported fields
}

func Binitr 

func Binitr(r io.Reader) *Biobuf

func Binitw 

func Binitw(w io.Writer) *Biobuf

func Bopenr 

func Bopenr(name string) (*Biobuf, error)

func Bopenw 

func Bopenw(name string) (*Biobuf, error)

func (*Biobuf) Flush 

func (b *Biobuf) Flush() error

func (*Biobuf) Peek 

func (b *Biobuf) Peek(n int) ([]byte, error)

func (*Biobuf) Read 

func (b *Biobuf) Read(p []byte) (int, error)

func (*Biobuf) Write 

func (b *Biobuf) Write(p []byte) (int, error)

type LSym 

type LSym struct {
	Name      string
	Type      int16
	Version   int16
	Dupok     uint8
	Cfunc     uint8
	Nosplit   uint8
	Leaf      uint8
	Seenglobl uint8
	Onlist    uint8
	// Local means make the symbol local even when compiling Go code to reference Go
	// symbols in other shared libraries, as in this mode symbols are global by
	// default. "local" here means in the sense of the dynamic linker, i.e. not
	// visible outside of the module (shared library or executable) that contains its
	// definition. (When not compiling to support Go shared libraries, all symbols are
	// local in this sense unless there is a cgo_export_* directive).
	Local  bool
	Args   int32
	Locals int32
	Value  int64
	Size   int64
	Next   *LSym
	Gotype *LSym
	Autom  *Auto
	Text   *Prog
	Etext  *Prog
	Pcln   *Pcln
	P      []byte
	R      []Reloc
}

An LSym is the sort of symbol that is written to an object file.

func Linklookup 

func Linklookup(ctxt *Link, name string, v int) *LSym

type LineHist 

type LineHist struct {
	Top            *LineStack  // current top of stack
	Ranges         []LineRange // ranges for lookup
	Dir            string      // directory to qualify relative paths
	TrimPathPrefix string      // remove leading TrimPath from recorded file names
	GOROOT         string      // current GOROOT
	GOROOT_FINAL   string      // target GOROOT
}

A LineHist records the history of the file input stack, which maps the virtual line number, an incrementing count of lines processed in any input file and typically named lineno, to a stack of file:line pairs showing the path of inclusions that led to that position. The first line directive (//line in Go, #line in assembly) is treated as pushing a new entry on the stack, so that errors can report both the actual and translated line number.

In typical use, the virtual lineno begins at 1, and file line numbers also begin at 1, but the only requirements placed upon the numbers by this code are:

  • calls to Push, Update, and Pop must be monotonically increasing in lineno
  • except as specified by those methods, virtual and file line number increase together, so that given (only) calls Push(10, "x.go", 1) and Pop(15), virtual line 12 corresponds to x.go line 3.

func (*LineHist) AbsFileLine 

func (h *LineHist) AbsFileLine(lineno int) (file string, line int)

AbsFileLine returns the absolute file name and line number at the top of the stack for the given lineno.

func (*LineHist) At 

func (h *LineHist) At(lineno int) *LineStack

At returns the input stack in effect at lineno.

func (*LineHist) FileLine 

func (h *LineHist) FileLine(lineno int) (file string, line int)

FileLine returns the file name and line number at the top of the stack for the given lineno.

func (*LineHist) LineString 

func (h *LineHist) LineString(lineno int) string

LineString returns a string giving the file and line number corresponding to lineno, for use in error messages.

func (*LineHist) Pop 

func (h *LineHist) Pop(lineno int)

Pop records that at lineno the current file was popped from the input stack.

func (*LineHist) Push 

func (h *LineHist) Push(lineno int, file string)

Push records that at that lineno a new file with the given name was pushed onto the input stack.

func (*LineHist) Update 

func (h *LineHist) Update(lineno int, file string, line int)

Update records that at lineno the file name and line number were changed using a line directive (//line in Go, #line in assembly).

type LineRange 

type LineRange struct {
	Start int        // starting lineno
	Stack *LineStack // top of stack for this range
}

The span of valid linenos in the recorded line history can be broken into a set of ranges, each with a particular stack. A LineRange records one such range.

type LineStack 

type LineStack struct {
	Parent    *LineStack // parent in inclusion stack
	Lineno    int        // virtual line number where this entry takes effect
	File      string     // file name used to open source file, for error messages
	AbsFile   string     // absolute file name, for pcln tables
	FileLine  int        // line number in file at Lineno
	Directive bool
	Sym       *LSym // for linkgetline - TODO(rsc): remove
}

A LineStack is an entry in the recorded line history. Although the history at any given line number is a stack, the record for all line processed forms a tree, with common stack prefixes acting as parents. 

type Link struct {
	Goarm              int32
	Headtype           int
	Arch               *LinkArch
	Debugasm           int32
	Debugvlog          int32
	Debugdivmod        int32
	Debugpcln          int32
	Flag_shared        int32
	Flag_dynlink       bool
	Bso                *Biobuf
	Pathname           string
	Windows            int32
	Goroot             string
	Goroot_final       string
	Enforce_data_order int32
	Hash               map[SymVer]*LSym
	LineHist           LineHist
	Imports            []string
	Plist              *Plist
	Plast              *Plist
	Sym_div            *LSym
	Sym_divu           *LSym
	Sym_mod            *LSym
	Sym_modu           *LSym
	Plan9privates      *LSym
	Curp               *Prog
	Printp             *Prog
	Blitrl             *Prog
	Elitrl             *Prog
	Rexflag            int
	Vexflag            int
	Rep                int
	Repn               int
	Lock               int
	Asmode             int
	Andptr             []byte
	And                [100]uint8
	Instoffset         int64
	Autosize           int32
	Armsize            int32
	Pc                 int64
	Diag               func(string, ...interface{})
	Mode               int
	Cursym             *LSym
	Version            int
	Textp              *LSym
	Etextp             *LSym
}

Link holds the context for writing object code from a compiler to be linker input or for reading that input into the linker.

func Linknew 

func Linknew(arch *LinkArch) *Link

func (*Link) AddImport 

func (ctxt *Link) AddImport(pkg string)

AddImport adds a package to the list of imported packages.

func (*Link) Dconv 

func (ctxt *Link) Dconv(a *Addr) string

func (*Link) FixedFrameSize 

func (ctxt *Link) FixedFrameSize() int64

The smallest possible offset from the hardware stack pointer to a local variable on the stack. Architectures that use a link register save its value on the stack in the function prologue and so always have a pointer between the hardware stack pointer and the local variable area.

func (*Link) Line 

func (ctxt *Link) Line(n int) string

func (*Link) NewProg 

func (ctxt *Link) NewProg() *Prog

type LinkArch 

type LinkArch struct {
	ByteOrder  binary.ByteOrder
	Name       string
	Thechar    int
	Preprocess func(*Link, *LSym)
	Assemble   func(*Link, *LSym)
	Follow     func(*Link, *LSym)
	Progedit   func(*Link, *Prog)
	UnaryDst   map[int]bool // Instruction takes one operand, a destination.
	Minlc      int
	Ptrsize    int
	Regsize    int
}

LinkArch is the definition of a single architecture.

type Pcdata 

type Pcdata struct {
	P []byte
}

type Pciter 

type Pciter struct {
	// contains filtered or unexported fields
}

Pcdata iterator. 

for(pciterinit(ctxt, &it, &pcd); !it.done; pciternext(&it)) { it.value holds in [it.pc, it.nextpc) }

type Pcln 

type Pcln struct {
	Pcsp        Pcdata
	Pcfile      Pcdata
	Pcline      Pcdata
	Pcdata      []Pcdata
	Funcdata    []*LSym
	Funcdataoff []int64
	File        []*LSym
	Lastfile    *LSym
	Lastindex   int
}

type Plist 

type Plist struct {
	Name    *LSym
	Firstpc *Prog
	Recur   int
	Link    *Plist
}

func Linknewplist 

func Linknewplist(ctxt *Link) *Plist

* start a new Prog list.

type Prog 

type Prog struct {
	Ctxt   *Link
	Link   *Prog
	From   Addr
	From3  *Addr // optional
	To     Addr
	Opt    interface{}
	Forwd  *Prog
	Pcond  *Prog
	Rel    *Prog // Source of forward jumps on x86; pcrel on arm
	Pc     int64
	Lineno int32
	Spadj  int32
	As     int16
	Reg    int16
	RegTo2 int16 // 2nd register output operand
	Mark   uint16
	Optab  uint16
	Scond  uint8
	Back   uint8
	Ft     uint8
	Tt     uint8
	Isize  uint8
	Mode   int8

	Info ProgInfo
}

TODO(rsc): Describe prog. TODO(rsc): Describe TEXT/GLOBL flag in from3, DATA width in from3.

func Appendp 

func Appendp(ctxt *Link, q *Prog) *Prog

func Brchain 

func Brchain(ctxt *Link, p *Prog) *Prog

func Copyp 

func Copyp(ctxt *Link, q *Prog) *Prog

func (*Prog) From3Offset 

func (p *Prog) From3Offset() int64

From3Offset returns From3.Offset, or 0 when From3 is nil.

func (*Prog) From3Type 

func (p *Prog) From3Type() int16

From3Type returns From3.Type, or TYPE_NONE when From3 is nil.

func (*Prog) Line 

func (p *Prog) Line() string

func (*Prog) String 

func (p *Prog) String() string

type ProgInfo 

type ProgInfo struct {
	Flags    uint32 // flag bits
	Reguse   uint64 // registers implicitly used by this instruction
	Regset   uint64 // registers implicitly set by this instruction
	Regindex uint64 // registers used by addressing mode
	// contains filtered or unexported fields
}

ProgInfo holds information about the instruction for use by clients such as the compiler. The exact meaning of this data is up to the client and is not interpreted by the cmd/internal/obj/... packages.

type Reloc 

type Reloc struct {
	Off  int32
	Siz  uint8
	Type int32
	Add  int64
	Sym  *LSym
}

func Addrel 

func Addrel(s *LSym) *Reloc

type SymVer 

type SymVer struct {
	Name    string
	Version int // TODO: make int16 to match LSym.Version?
}

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