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| author | Paul E. Murphy <murp@ibm.com> | 2022-06-13 10:59:31 -0500 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2022-09-15 21:11:05 +0000 |
| commit | 7fda98a8d90139fed07d7f8ca80d248a5cbc1e93 (patch) | |
| tree | e73a3f56c03d149f67a8eef71741734fa6ea1418 /src/cmd/link/internal/loadelf | |
| parent | e7a2014fac885392e14205c93fff3fd8db84fa8d (diff) | |
| download | go-7fda98a8d90139fed07d7f8ca80d248a5cbc1e93.tar.xz | |
cmd/link: support -fno-plt compiled gcc objects on ppc64le
This is the initial trivial implemenation. Further improvements can be
made for local calls.
A test is added, but the -fno-plt option is ignored by gcc if binutils
does not support inline plt relocations, so the test is effectively
skipped on such hosts.
Fixes #53345
Change-Id: Ibf31c26b1a8551c942b21019df8782c00b7a563e
Reviewed-on: https://go-review.googlesource.com/c/go/+/412714
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Paul Murphy <murp@ibm.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Jenny Rakoczy <jenny@golang.org>
Auto-Submit: Jenny Rakoczy <jenny@golang.org>
Run-TryBot: Jenny Rakoczy <jenny@golang.org>
Diffstat (limited to 'src/cmd/link/internal/loadelf')
| -rw-r--r-- | src/cmd/link/internal/loadelf/ldelf.go | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/cmd/link/internal/loadelf/ldelf.go b/src/cmd/link/internal/loadelf/ldelf.go index 6014caca09..74f7cb15a0 100644 --- a/src/cmd/link/internal/loadelf/ldelf.go +++ b/src/cmd/link/internal/loadelf/ldelf.go @@ -1108,8 +1108,19 @@ func relSize(arch *sys.Arch, pn string, elftype uint32) (uint8, uint8, error) { PPC64 | uint32(elf.R_PPC64_TOC16_LO_DS)<<16, PPC64 | uint32(elf.R_PPC64_REL16_LO)<<16, PPC64 | uint32(elf.R_PPC64_REL16_HI)<<16, - PPC64 | uint32(elf.R_PPC64_REL16_HA)<<16: + PPC64 | uint32(elf.R_PPC64_REL16_HA)<<16, + PPC64 | uint32(elf.R_PPC64_PLT16_HA)<<16, + PPC64 | uint32(elf.R_PPC64_PLT16_LO_DS)<<16: return 2, 4, nil + + // PPC64 inline PLT sequence hint relocations (-fno-plt) + // These are informational annotations to assist linker optimizations. + case PPC64 | uint32(elf.R_PPC64_PLTSEQ)<<16, + PPC64 | uint32(elf.R_PPC64_PLTCALL)<<16, + PPC64 | uint32(elf.R_PPC64_PLTCALL_NOTOC)<<16, + PPC64 | uint32(elf.R_PPC64_PLTSEQ_NOTOC)<<16: + return 0, 0, nil + } } |