Date: Fri, 27 Aug 2004 19:42:35 +0000 (UTC) From: Marcel Moolenaar <marcel@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/alpha/include profile.h src/sys/amd64/include profile.h src/sys/arm/include profile.h src/sys/i386/include profile.h src/sys/ia64/include profile.h src/sys/powerpc/include profile.h src/sys/sparc64/include profile.h src/sys/libkern ... Message-ID: <200408271942.i7RJgZbN072835@repoman.freebsd.org>
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marcel 2004-08-27 19:42:35 UTC
FreeBSD src repository
Modified files:
sys/alpha/include profile.h
sys/amd64/include profile.h
sys/arm/include profile.h
sys/i386/include profile.h
sys/ia64/include profile.h
sys/powerpc/include profile.h
sys/sparc64/include profile.h
sys/libkern mcount.c
Log:
Move the kernel-specific logic to adjust frompc from MI to MD. For
these two reasons:
1. On ia64 a function pointer does not hold the address of the first
instruction of a functions implementation. It holds the address
of a function descriptor. Hence the user(), btrap(), eintr() and
bintr() prototypes are wrong for getting the actual code address.
2. The logic forces interrupt, trap and exception entry points to
be layed-out contiguously. This can not be achieved on ia64 and is
generally just bad programming.
The MCOUNT_FROMPC_USER macro is used to set the frompc argument to
some kernel address which represents any frompc that falls outside
the kernel text range. The macro can expand to ~0U to bail out in
that case.
The MCOUNT_FROMPC_INTR macro is used to set the frompc argument to
some kernel address to represent a call to a trap or interrupt
handler. This to avoid that the trap or interrupt handler appear to
be called from everywhere in the call graph. The macro can expand
to ~0U to prevent adjusting frompc. Note that the argument is selfpc,
not frompc.
This commit defines the macros on all architectures equivalently to
the original code in sys/libkern/mcount.c. People can take it from
here...
Compile-tested on: alpha, amd64, i386, ia64 and sparc64
Boot-tested on: i386
Revision Changes Path
1.7 +21 -5 src/sys/alpha/include/profile.h
1.42 +13 -0 src/sys/amd64/include/profile.h
1.4 +13 -0 src/sys/arm/include/profile.h
1.38 +13 -0 src/sys/i386/include/profile.h
1.11 +15 -0 src/sys/ia64/include/profile.h
1.23 +21 -33 src/sys/libkern/mcount.c
1.3 +14 -0 src/sys/powerpc/include/profile.h
1.7 +13 -0 src/sys/sparc64/include/profile.h
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