libgo patch committed: Recognize morestack.S if no function name

[Ian Lance Taylor]

When using an old assembler it's possible to get debug info that says
that a PC is in morestack.S but does not have the function name.  This
patch changes the Go backtrace code to recognize this case.
Bootstrapped and ran Go testsuite on x86_64-unknown-linux-gnu.
Committed to mainline.

Ian

-------------- next part --------------
A non-text attachment was scrubbed...
Name: foo.patch
Type: text/x-diff
Size: 721 bytes
Desc: patch
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20130131/f54a3105/attachment.bin>