Example #1
1
func archinit() {
	// getgoextlinkenabled is based on GO_EXTLINK_ENABLED when
	// Go was built; see ../../make.bash.
	if ld.Linkmode == ld.LinkAuto && obj.Getgoextlinkenabled() == "0" {
		ld.Linkmode = ld.LinkInternal
	}

	if ld.Buildmode == ld.BuildmodeCShared || ld.Buildmode == ld.BuildmodePIE || ld.DynlinkingGo() {
		ld.Linkmode = ld.LinkExternal
		got := ld.Linklookup(ld.Ctxt, "_GLOBAL_OFFSET_TABLE_", 0)
		got.Type = obj.SDYNIMPORT
		got.Attr |= ld.AttrReachable
	}

	switch ld.HEADTYPE {
	default:
		if ld.Linkmode == ld.LinkAuto {
			ld.Linkmode = ld.LinkInternal
		}
		if ld.Linkmode == ld.LinkExternal && obj.Getgoextlinkenabled() != "1" {
			log.Fatalf("cannot use -linkmode=external with -H %s", ld.Headstr(int(ld.HEADTYPE)))
		}

	case obj.Hdarwin,
		obj.Hfreebsd,
		obj.Hlinux,
		obj.Hnetbsd,
		obj.Hopenbsd,
		obj.Hwindows:
		break
	}

	switch ld.HEADTYPE {
	default:
		ld.Exitf("unknown -H option: %v", ld.HEADTYPE)

	case obj.Hplan9: /* plan 9 */
		ld.HEADR = 32

		if ld.INITTEXT == -1 {
			ld.INITTEXT = 4096 + 32
		}
		if ld.INITDAT == -1 {
			ld.INITDAT = 0
		}
		if ld.INITRND == -1 {
			ld.INITRND = 4096
		}

	case obj.Hdarwin: /* apple MACH */
		ld.Machoinit()

		ld.HEADR = ld.INITIAL_MACHO_HEADR
		if ld.INITTEXT == -1 {
			ld.INITTEXT = 4096 + int64(ld.HEADR)
		}
		if ld.INITDAT == -1 {
			ld.INITDAT = 0
		}
		if ld.INITRND == -1 {
			ld.INITRND = 4096
		}

	case obj.Hlinux, /* elf32 executable */
		obj.Hfreebsd,
		obj.Hnetbsd,
		obj.Hopenbsd:
		ld.Elfinit()

		ld.HEADR = ld.ELFRESERVE
		if ld.INITTEXT == -1 {
			ld.INITTEXT = 0x08048000 + int64(ld.HEADR)
		}
		if ld.INITDAT == -1 {
			ld.INITDAT = 0
		}
		if ld.INITRND == -1 {
			ld.INITRND = 4096
		}

	case obj.Hnacl:
		ld.Elfinit()
		ld.HEADR = 0x10000
		ld.Funcalign = 32
		if ld.INITTEXT == -1 {
			ld.INITTEXT = 0x20000
		}
		if ld.INITDAT == -1 {
			ld.INITDAT = 0
		}
		if ld.INITRND == -1 {
			ld.INITRND = 0x10000
		}

	case obj.Hwindows: /* PE executable */
		ld.Peinit()

		ld.HEADR = ld.PEFILEHEADR
		if ld.INITTEXT == -1 {
			ld.INITTEXT = ld.PEBASE + int64(ld.PESECTHEADR)
		}
		if ld.INITDAT == -1 {
			ld.INITDAT = 0
		}
		if ld.INITRND == -1 {
			ld.INITRND = ld.PESECTALIGN
		}
	}

	if ld.INITDAT != 0 && ld.INITRND != 0 {
		fmt.Printf("warning: -D0x%x is ignored because of -R0x%x\n", uint64(ld.INITDAT), uint32(ld.INITRND))
	}
}
Example #2
0
func archinit() {
	// getgoextlinkenabled is based on GO_EXTLINK_ENABLED when
	// Go was built; see ../../make.bash.
	if ld.Linkmode == ld.LinkAuto && obj.Getgoextlinkenabled() == "0" {
		ld.Linkmode = ld.LinkInternal
	}

	if ld.Buildmode == ld.BuildmodeCArchive || ld.Buildmode == ld.BuildmodeCShared || ld.DynlinkingGo() {
		ld.Linkmode = ld.LinkExternal
	}

	switch ld.HEADTYPE {
	default:
		if ld.Linkmode == ld.LinkAuto {
			ld.Linkmode = ld.LinkInternal
		}
		if ld.Linkmode == ld.LinkExternal && obj.Getgoextlinkenabled() != "1" {
			log.Fatalf("cannot use -linkmode=external with -H %s", ld.Headstr(int(ld.HEADTYPE)))
		}

	case obj.Hdarwin,
		obj.Hdragonfly,
		obj.Hfreebsd,
		obj.Hlinux,
		obj.Hnacl,
		obj.Hnetbsd,
		obj.Hopenbsd,
		obj.Hsolaris,
		obj.Hwindows:
		break
	}

	switch ld.HEADTYPE {
	default:
		ld.Exitf("unknown -H option: %v", ld.HEADTYPE)

	case obj.Hplan9: /* plan 9 */
		ld.HEADR = 32 + 8

		if ld.INITTEXT == -1 {
			ld.INITTEXT = 0x200000 + int64(ld.HEADR)
		}
		if ld.INITDAT == -1 {
			ld.INITDAT = 0
		}
		if ld.INITRND == -1 {
			ld.INITRND = 0x200000
		}

	case obj.Hdarwin: /* apple MACH */
		ld.Machoinit()

		ld.HEADR = ld.INITIAL_MACHO_HEADR
		if ld.INITRND == -1 {
			ld.INITRND = 4096
		}
		if ld.INITTEXT == -1 {
			ld.INITTEXT = 4096 + int64(ld.HEADR)
		}
		if ld.INITDAT == -1 {
			ld.INITDAT = 0
		}

	case obj.Hlinux, /* elf64 executable */
		obj.Hfreebsd,   /* freebsd */
		obj.Hnetbsd,    /* netbsd */
		obj.Hopenbsd,   /* openbsd */
		obj.Hdragonfly, /* dragonfly */
		obj.Hsolaris:   /* solaris */
		ld.Elfinit()

		ld.HEADR = ld.ELFRESERVE
		if ld.INITTEXT == -1 {
			ld.INITTEXT = (1 << 22) + int64(ld.HEADR)
		}
		if ld.INITDAT == -1 {
			ld.INITDAT = 0
		}
		if ld.INITRND == -1 {
			ld.INITRND = 4096
		}

	case obj.Hnacl:
		ld.Elfinit()
		ld.Debug['w']++ // disable dwarf, which gets confused and is useless anyway
		ld.HEADR = 0x10000
		ld.Funcalign = 32
		if ld.INITTEXT == -1 {
			ld.INITTEXT = 0x20000
		}
		if ld.INITDAT == -1 {
			ld.INITDAT = 0
		}
		if ld.INITRND == -1 {
			ld.INITRND = 0x10000
		}

	case obj.Hwindows: /* PE executable */
		ld.Peinit()

		ld.HEADR = ld.PEFILEHEADR
		if ld.INITTEXT == -1 {
			ld.INITTEXT = ld.PEBASE + int64(ld.PESECTHEADR)
		}
		if ld.INITDAT == -1 {
			ld.INITDAT = 0
		}
		if ld.INITRND == -1 {
			ld.INITRND = ld.PESECTALIGN
		}
	}

	if ld.INITDAT != 0 && ld.INITRND != 0 {
		fmt.Printf("warning: -D0x%x is ignored because of -R0x%x\n", uint64(ld.INITDAT), uint32(ld.INITRND))
	}
}