sense to have a weak symbol that is not externally visible. This
fixes many of the "relocation burb" warnings produced when compiling
C++ code with "-fpic". Beyond eliminating warnings, it also makes
some things work that didn't work before.
of binutils. For all architectures and object file formats,
".p2align n" aligns to the next multiple of 2**n. Thus for FreeBSD,
it does exactly the same thing as the traditional ".align".
The old ".align" directive has different meanings in different
object formats, and even in different variants of a.out. Sometimes
is aligns to a multiple of n, and other times it aligns to a multiple
of 2**n. ".p2align" is preferable for use in assembly language
sources, since it makes them more portable to object formats other
than a.out.
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.
libg++'s exception code causes gcc to generate (ahem!) non-conventional
assembler code in -fpic mode that gas and ld choke on. Basically, gas
and ld require than symbols referenced in the GOT (global offset table)
are actually global (as the name implies). It attempted to work around
it before, but didn't quite go far enough to prevent a core dump in ld.
This hack causes GOT referenced symbols to be forced global. This
probably breaks the __EXCEPTION_TABLE__ stuff in pic mode, but heck, it
wasn't even possible to compile with a shared library before at all.
I'm not 100% sure what the bug is. There's two possibilities:
1: gcc/cp/exception.c has to be fixed to stop doing GOT references to
local symbols, or
2: as/ld/symorder/ld.so etc need to be taught about how to keep local
symbols around so that they can be dealt with in GOT references.
John Polstra's elfkit stuff seems to deal with this fine though, which is
why I think it's a "missing feature" in our hacked gas and ld..
.weak as gcc and g++ would like to use.
This includes changes to other architectures mostly for completeness,
I don't expect cross-assemblink would work but I could be wrong.
Obtained from: NetBSD
patch file had absolute pathnames in it and went and patched /usr/src directly
(first time this has happened, I'll watch for it now), so I thought I might
as well just commit it and clean up the .orig files and whatnot left behind.
Sorry - this is the first time this has happened to me. Very confusing.
These files aren't really necessary to us, but should be kept in sync anyway.
patch file had absolute pathnames in it and went and patched /usr/src directly
(first time this has happened, I'll watch for it now), so I thought I might
as well just commit it and clean up the .orig files and whatnot left behind.
Sorry - this is the first time this has happened to me. Very confusing.
Date: Fri, 24 Sep 1993 10:19:20 -0700
Fixed bug that was reported (with patch) on gnu.utils.bug.
Immediate operands of the pushw instruction were being output as 32
bits, rather than the 16 bits they were supposed to be.
