cmd/link: support PIE on linux/s390x without cgo

Enable PIE builds on linux/s390x when CGO is disabled by teaching
the linker to handle dynamic relocations against SDYNIMPORT
symbols.

This adds support for TLS_IE and handles R_CALL, R_PCRELDBL, and
R_ADDR relocations by generating the appropriate PLT/GOT entries
instead of rejecting them as unsupported.

Fixes #77449

Cq-Include-Trybots: luci.golang.try:gotip-linux-s390x
Change-Id: Ib6586780073fedbcbd42b9a2c554a99dd7386aa6
Reviewed-on: https://go-review.googlesource.com/c/go/+/742342
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
5 files changed
tree: 2af3f8c73798554441d53dc0b94a18f3045c5c1f
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. codereview.cfg
  11. CONTRIBUTING.md
  12. go.env
  13. LICENSE
  14. PATENTS
  15. README.md
  16. SECURITY.md
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