Date: Thu, 24 Jan 2002 07:36:52 -0800 (PST) From: "David E. O'Brien" <obrien@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/contrib/gcc.295/config/alpha freebsd.h Message-ID: <200201241536.g0OFaqr66582@freefall.freebsd.org>
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obrien 2002/01/24 07:36:52 PST
Modified files:
contrib/gcc.295/config/alpha freebsd.h
Log:
Remove our definition for FUNCTION_PROFILER as it is wrong.
Note that "jsr $28,_mcount" is a macro for
ldq $27, _mcount($29) !literal!1
jsr $28, ($27), _mcount !lituse_jsr!1
1. The call to _mcount is added by alpha_expand_prologue after we load the gp.
Our _mcount uses $27 for the incoming address, unlike OSF/1 and Linux,
which use $28. This probably doesn't matter since we probably don't use $27
within _mcount itself.
2. You can't use this insn with _mcount because it uses the PLT, which clobbers
the return address in $28. Note that the prologue_mcount pattern carefully
avoids adding the lituse_jsr relocation so that we call through the GOT
directly.
Submitted by: Richard Henderson <rth@redhat.com>
Revision Changes Path
1.12 +1 -9 src/contrib/gcc.295/config/alpha/freebsd.h
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