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8c46cb1bf5
In CL 240399 we changed to precompute the size for ELF relocation records and use mmap to write them, but we left architectures where elfreloc1 write non-fixed number of bytes. This CL handles those architectures. When a Go relocation will turn into multiple ELF relocations, in relocsym we account this difference and add it to the size calculation. So when emitting ELF relocations, we know the number of ELF relocations to be emitted. Change-Id: I6732ab674b442f4618405e5412a77f6e4a3315d7 Reviewed-on: https://go-review.googlesource.com/c/go/+/241079 Reviewed-by: Than McIntosh <thanm@google.com> Reviewed-by: Jeremy Faller <jeremy@golang.org>
117 lines
3.5 KiB
Go
117 lines
3.5 KiB
Go
// Inferno utils/8l/obj.c
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// https://bitbucket.org/inferno-os/inferno-os/src/master/utils/8l/obj.c
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//
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// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
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// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
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// Portions Copyright © 1997-1999 Vita Nuova Limited
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// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
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// Portions Copyright © 2004,2006 Bruce Ellis
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// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
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// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
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// Portions Copyright © 2009 The Go Authors. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package x86
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import (
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"cmd/internal/objabi"
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"cmd/internal/sys"
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"cmd/link/internal/ld"
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)
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func Init() (*sys.Arch, ld.Arch) {
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arch := sys.Arch386
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theArch := ld.Arch{
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Funcalign: funcAlign,
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Maxalign: maxAlign,
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Minalign: minAlign,
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Dwarfregsp: dwarfRegSP,
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Dwarfreglr: dwarfRegLR,
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// 0xCC is INT $3 - breakpoint instruction
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CodePad: []byte{0xCC},
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Plan9Magic: uint32(4*11*11 + 7),
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Adddynrel: adddynrel,
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Archinit: archinit,
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Archreloc: archreloc,
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Archrelocvariant: archrelocvariant,
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Elfreloc1: elfreloc1,
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ElfrelocSize: 8,
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Elfsetupplt: elfsetupplt,
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Gentext: gentext,
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Machoreloc1: machoreloc1,
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PEreloc1: pereloc1,
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Linuxdynld: "/lib/ld-linux.so.2",
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Freebsddynld: "/usr/libexec/ld-elf.so.1",
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Openbsddynld: "/usr/libexec/ld.so",
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Netbsddynld: "/usr/libexec/ld.elf_so",
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Solarisdynld: "/lib/ld.so.1",
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}
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return arch, theArch
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}
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func archinit(ctxt *ld.Link) {
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switch ctxt.HeadType {
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default:
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ld.Exitf("unknown -H option: %v", ctxt.HeadType)
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case objabi.Hplan9: /* plan 9 */
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ld.HEADR = 32
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if *ld.FlagTextAddr == -1 {
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*ld.FlagTextAddr = 4096 + int64(ld.HEADR)
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}
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if *ld.FlagRound == -1 {
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*ld.FlagRound = 4096
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}
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case objabi.Hdarwin: /* apple MACH */
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ld.HEADR = ld.INITIAL_MACHO_HEADR
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if *ld.FlagTextAddr == -1 {
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*ld.FlagTextAddr = 4096 + int64(ld.HEADR)
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}
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if *ld.FlagRound == -1 {
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*ld.FlagRound = 4096
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}
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case objabi.Hlinux, /* elf32 executable */
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objabi.Hfreebsd,
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objabi.Hnetbsd,
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objabi.Hopenbsd:
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ld.Elfinit(ctxt)
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ld.HEADR = ld.ELFRESERVE
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if *ld.FlagTextAddr == -1 {
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*ld.FlagTextAddr = 0x08048000 + int64(ld.HEADR)
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}
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if *ld.FlagRound == -1 {
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*ld.FlagRound = 4096
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}
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case objabi.Hwindows: /* PE executable */
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// ld.HEADR, ld.FlagTextAddr, ld.FlagRound are set in ld.Peinit
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return
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}
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}
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