diff options
| author | Paul E. Murphy <murp@ibm.com> | 2021-07-14 14:09:27 -0500 |
|---|---|---|
| committer | Lynn Boger <laboger@linux.vnet.ibm.com> | 2021-11-05 19:14:22 +0000 |
| commit | fa16efb8358e0cb23e285803075764abbdcffe5e (patch) | |
| tree | 48840800c98379e5fb0c286723c1b300297e48d7 /src/cmd/link/internal/ld/data.go | |
| parent | 93bab8a2f918afa8417f7b46da69c21d643de880 (diff) | |
| download | go-fa16efb8358e0cb23e285803075764abbdcffe5e.tar.xz | |
cmd/link: enable internal linking of PIE binaries on ppc64le
The amd64/arm64 relocation processing is used as a template
and updated for ppc64le.
This requires updating the TOC relocation handling code to
support linux type TOC relocations too (note, AIX uses
TOC-indirect accesses).
Noteably, the shared flag of go functions is used as a proxy
for the local entry point offset encoded in elf objects. Functions
in go ppc64le shared objects always[1] insert 2 instructions to
regenerate the TOC pointer.
[1] excepting a couple special runtime functions, see preprocess
in obj9.go for specific details of this behavior.
Change-Id: I3646e6dc8a0a0ffe712771a976983315eae5c418
Reviewed-on: https://go-review.googlesource.com/c/go/+/352829
Run-TryBot: Paul Murphy <murp@ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
Diffstat (limited to 'src/cmd/link/internal/ld/data.go')
| -rw-r--r-- | src/cmd/link/internal/ld/data.go | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/cmd/link/internal/ld/data.go b/src/cmd/link/internal/ld/data.go index 0513a0d10b..4d85977d43 100644 --- a/src/cmd/link/internal/ld/data.go +++ b/src/cmd/link/internal/ld/data.go @@ -227,6 +227,8 @@ func (st *relocSymState) relocsym(s loader.Sym, P []byte) { // DWARF info between the compiler and linker. continue } + } else if target.IsPPC64() && target.IsPIE() && ldr.SymName(rs) == ".TOC." { + // This is a TOC relative relocation generated from a go object. It is safe to resolve. } else { st.err.errorUnresolved(ldr, s, rs) continue |