diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/cmd/ld/data.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/cmd/ld/data.c b/src/cmd/ld/data.c index 24969db55..55d020710 100644 --- a/src/cmd/ld/data.c +++ b/src/cmd/ld/data.c @@ -243,6 +243,16 @@ relocsym(LSym *s) break; } o = symaddr(r->sym) + r->add; + + // On amd64, 4-byte offsets will be sign-extended, so it is impossible to + // access more than 2GB of static data; fail at link time is better than + // fail at runtime. See http://golang.org/issue/7980. + // Instead of special casing only amd64, we treat this as an error on all + // 64-bit architectures so as to be future-proof. + if((int32)o < 0 && PtrSize > 4 && siz == 4) { + diag("non-pc-relative relocation address is too big: %#llux", o); + errorexit(); + } break; case R_CALL: case R_PCREL: |