go obj 源码
golang obj 代码
文件路径：/src/cmd/link/internal/riscv64/obj.go
// Copyright 2019 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 riscv64
import (
"cmd/internal/objabi"
"cmd/internal/sys"
"cmd/link/internal/ld"
)
func Init() (*sys.Arch, ld.Arch) {
arch := sys.ArchRISCV64
theArch := ld.Arch{
Funcalign: funcAlign,
Maxalign: maxAlign,
Minalign: minAlign,
Dwarfregsp: dwarfRegSP,
Dwarfreglr: dwarfRegLR,
Archinit: archinit,
Archreloc: archreloc,
Archrelocvariant: archrelocvariant,
Extreloc: extreloc,
Elfreloc1: elfreloc1,
ElfrelocSize: 24,
Elfsetupplt: elfsetupplt,
// TrampLimit is set such that we always run the trampoline
// generation code. This is necessary since calls to external
// symbols require the use of trampolines, regardless of the
// text size.
TrampLimit: 1,
Trampoline: trampoline,
Gentext: gentext,
GenSymsLate: genSymsLate,
Machoreloc1: machoreloc1,
Linuxdynld: "/lib/ld.so.1",
Freebsddynld: "XXX",
Netbsddynld: "XXX",
Openbsddynld: "XXX",
Dragonflydynld: "XXX",
Solarisdynld: "XXX",
}
return arch, theArch
}
func archinit(ctxt *ld.Link) {
switch ctxt.HeadType {
case objabi.Hlinux:
ld.Elfinit(ctxt)
ld.HEADR = ld.ELFRESERVE
if *ld.FlagTextAddr == -1 {
*ld.FlagTextAddr = 0x10000 + int64(ld.HEADR)
}
if *ld.FlagRound == -1 {
*ld.FlagRound = 0x10000
}
default:
ld.Exitf("unknown -H option: %v", ctxt.HeadType)
}
}
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