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| author | Russ Cox <rsc@golang.org> | 2014-04-14 13:20:51 -0400 |
|---|---|---|
| committer | Russ Cox <rsc@golang.org> | 2014-04-14 13:20:51 -0400 |
| commit | 0e8de61d7311d6bc74fc244de44df9be452a112b (patch) | |
| tree | c1fc4bd0d6c4973b8b2f66ad495472c84d21a3d0 /src/liblink/objfile.c | |
| parent | 071a0f4d18c5b5869bdcb6b0ca0e396cfa4506c6 (diff) | |
| download | go-0e8de61d7311d6bc74fc244de44df9be452a112b.tar.xz | |
liblink, cmd/link: add version number to object file
There are changes we know we want to make, but not before Go 1.3
Add a version number so that we can make them more easily later.
LGTM=iant
R=iant
CC=golang-codereviews
https://golang.org/cl/87670043
Diffstat (limited to 'src/liblink/objfile.c')
| -rw-r--r-- | src/liblink/objfile.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/liblink/objfile.c b/src/liblink/objfile.c index b602536251..f0f3f76223 100644 --- a/src/liblink/objfile.c +++ b/src/liblink/objfile.c @@ -16,6 +16,7 @@ // The file format is: // // - magic header: "\x00\x00go13ld" +// - byte 1 - version number // - sequence of strings giving dependencies (imported packages) // - empty string (marks end of sequence) // - sequence of defined symbols @@ -248,7 +249,8 @@ linkwriteobj(Link *ctxt, Biobuf *b) Bputc(b, 0); Bputc(b, 0); Bprint(b, "go13ld"); - + Bputc(b, 1); // version + // Emit autolib. for(h = ctxt->hist; h != nil; h = h->link) if(h->offset < 0) @@ -453,6 +455,8 @@ ldobjfile(Link *ctxt, Biobuf *f, char *pkg, int64 len, char *pn) Bread(f, buf, sizeof buf); if(memcmp(buf, startmagic, sizeof buf) != 0) sysfatal("%s: invalid file start %x %x %x %x %x %x %x %x", pn, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7]); + if((c = Bgetc(f)) != 1) + sysfatal("%s: invalid file version number %d", pn, c); for(;;) { lib = rdstring(f); |