diff options
Diffstat (limited to 'src/cmd/link/internal/ppc64/asm.go')
| -rw-r--r-- | src/cmd/link/internal/ppc64/asm.go | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/cmd/link/internal/ppc64/asm.go b/src/cmd/link/internal/ppc64/asm.go index b1c0873d7a..a3ecd43f89 100644 --- a/src/cmd/link/internal/ppc64/asm.go +++ b/src/cmd/link/internal/ppc64/asm.go @@ -672,13 +672,19 @@ func trampoline(ctxt *ld.Link, ldr *loader.Loader, ri int, rs, s loader.Sym) { relocs := ldr.Relocs(s) r := relocs.At2(ri) - t := ldr.SymValue(rs) + r.Add() - (ldr.SymValue(s) + int64(r.Off())) + var t int64 + // ldr.SymValue(rs) == 0 indicates a cross-package jump to a function that is not yet + // laid out. Conservatively use a trampoline. This should be rare, as we lay out packages + // in dependency order. + if ldr.SymValue(rs) != 0 { + t = ldr.SymValue(rs) + r.Add() - (ldr.SymValue(s) + int64(r.Off())) + } switch r.Type() { case objabi.R_CALLPOWER: // If branch offset is too far then create a trampoline. - if (ctxt.IsExternal() && ldr.SymSect(s) != ldr.SymSect(rs)) || (ctxt.IsInternal() && int64(int32(t<<6)>>6) != t) || (*ld.FlagDebugTramp > 1 && ldr.SymPkg(s) != ldr.SymPkg(rs)) { + if (ctxt.IsExternal() && ldr.SymSect(s) != ldr.SymSect(rs)) || (ctxt.IsInternal() && int64(int32(t<<6)>>6) != t) || ldr.SymValue(rs) == 0 || (*ld.FlagDebugTramp > 1 && ldr.SymPkg(s) != ldr.SymPkg(rs)) { var tramp loader.Sym for i := 0; ; i++ { @@ -769,7 +775,7 @@ func gentramp(ctxt *ld.Link, ldr *loader.Loader, tramp *loader.SymbolBuilder, ta // With external linking, the target address must be // relocated using LO and HA - if ctxt.IsExternal() { + if ctxt.IsExternal() || ldr.SymValue(target) == 0 { r := loader.Reloc{ Off: 0, Type: objabi.R_ADDRPOWER, |