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cmd/internal/obj, cmd/internal/ld, cmd/7l: external linking for darwin/arm64

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Change-Id: I3b3f80791a1db4c2b7318f81a115972cd2237f02
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/8781
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This commit is contained in:
Shenghou Ma 2015-04-10 21:28:09 -04:00 • committed by Minux Ma
parent 909bdf56d6
commit 4fd9a3fdbb
7 changed files with 213 additions and 29 deletions
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12
src/cmd/internal/ld/data.go
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@ -451,8 +451,18 @@ func relocsym(s *LSym) {
o = 0
}
} else if HEADTYPE == Hdarwin {
// ld64 for arm64 has a bug where if the address pointed to by o exists in the
// symbol table (dynid >= 0), or is inside a symbol that exists in the symbol
// table, then it will add o twice into the relocated value.
// The workaround is that on arm64 don't ever add symaddr to o and always use
// extern relocation by requiring rs->dynid >= 0.
if rs.Type != SHOSTOBJ {
o += Symaddr(rs)
if Thearch.Thechar == '7' && rs.Dynid < 0 {
Diag("R_ADDR reloc to %s+%d is not supported on darwin/arm64", rs.Name, o)
}
if Thearch.Thechar != '7' {
o += Symaddr(rs)
}
}
} else if HEADTYPE == Hwindows {
// nothing to do