/pkg/bootstrap/src/bootstrap/cmd/link/internal/ld/symkind.go
Go | 155 lines | 85 code | 12 blank | 58 comment | 0 complexity | 4c1f86059db626ec55e46852b82e101b MD5 | raw file
Possible License(s): BSD-3-Clause, Apache-2.0
- // Do not edit. Bootstrap copy of /home/bnat6582/go/src/cmd/link/internal/ld/symkind.go
- //line /home/bnat6582/go/src/cmd/link/internal/ld/symkind.go:1
- // Derived from Inferno utils/6l/l.h and related files.
- // https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6l/l.h
- //
- // Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
- // Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
- // Portions Copyright © 1997-1999 Vita Nuova Limited
- // Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
- // Portions Copyright © 2004,2006 Bruce Ellis
- // Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
- // Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
- // Portions Copyright © 2009 The Go Authors. All rights reserved.
- //
- // Permission is hereby granted, free of charge, to any person obtaining a copy
- // of this software and associated documentation files (the "Software"), to deal
- // in the Software without restriction, including without limitation the rights
- // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- // copies of the Software, and to permit persons to whom the Software is
- // furnished to do so, subject to the following conditions:
- //
- // The above copyright notice and this permission notice shall be included in
- // all copies or substantial portions of the Software.
- //
- // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- // THE SOFTWARE.
- package ld
- // A SymKind describes the kind of memory represented by a symbol.
- type SymKind int16
- // Defined SymKind values.
- //
- // TODO(rsc): Give idiomatic Go names.
- //go:generate stringer -type=SymKind
- const (
- Sxxx SymKind = iota
- STEXT
- SELFRXSECT
- // Read-only sections.
- STYPE
- SSTRING
- SGOSTRING
- SGOFUNC
- SGCBITS
- SRODATA
- SFUNCTAB
- SELFROSECT
- SMACHOPLT
- // Read-only sections with relocations.
- //
- // 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
- // Part of .data.rel.ro if it exists, otherwise part of .rodata.
- STYPELINK
- SITABLINK
- SSYMTAB
- SPCLNTAB
- // Writable sections.
- SELFSECT
- SMACHO
- SMACHOGOT
- SWINDOWS
- SELFGOT
- SNOPTRDATA
- SINITARR
- SDATA
- SBSS
- SNOPTRBSS
- STLSBSS
- SXREF
- SMACHOSYMSTR
- SMACHOSYMTAB
- SMACHOINDIRECTPLT
- SMACHOINDIRECTGOT
- SFILE
- SFILEPATH
- SCONST
- SDYNIMPORT
- SHOSTOBJ
- SDWARFSECT
- SDWARFINFO
- SDWARFRANGE
- SSUB = SymKind(1 << 8)
- SMASK = SymKind(SSUB - 1)
- SHIDDEN = SymKind(1 << 9)
- SCONTAINER = SymKind(1 << 10) // has a sub-symbol
- )
- // abiSymKindToSymKind maps values read from object files (which are
- // of type cmd/internal/objabi.SymKind) to values of type SymKind.
- var abiSymKindToSymKind = [...]SymKind{
- Sxxx,
- STEXT,
- SRODATA,
- SNOPTRDATA,
- SDATA,
- SBSS,
- SNOPTRBSS,
- STLSBSS,
- SDWARFINFO,
- SDWARFRANGE,
- }
- // readOnly are the symbol kinds that form read-only sections. In some
- // cases, if they will require relocations, they are transformed into
- // rel-ro sections using relROMap.
- var readOnly = []SymKind{
- STYPE,
- SSTRING,
- SGOSTRING,
- SGOFUNC,
- SGCBITS,
- SRODATA,
- SFUNCTAB,
- }
- // relROMap describes the transformation of read-only symbols to rel-ro
- // symbols.
- var relROMap = map[SymKind]SymKind{
- STYPE: STYPERELRO,
- SSTRING: SSTRINGRELRO,
- SGOSTRING: SGOSTRINGRELRO,
- SGOFUNC: SGOFUNCRELRO,
- SGCBITS: SGCBITSRELRO,
- SRODATA: SRODATARELRO,
- SFUNCTAB: SFUNCTABRELRO,
- }