Date: Tue, 1 Jan 2002 12:56:28 -0800 (PST) From: Jake Burkholder <jake@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/sparc64/include proc.h src/sys/sparc64/sparc64 exception.s machdep.c sys_machdep.c vm_machdep.c Message-ID: <200201012056.g01KuSW38482@freefall.freebsd.org>
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jake 2002/01/01 12:56:28 PST
Modified files:
sys/sparc64/include proc.h
sys/sparc64/sparc64 exception.s machdep.c sys_machdep.c
vm_machdep.c
Log:
Implement user trap delivery as specified by the sparc abi. This provides
an efficient way for the kernel to bounce certain mundane traps back to
userland for handling there. A user trap handler returns directly to the
trapping user code, rather than going through the kernel again. Only a
handful of instructions are actually executed in kernel mode.
Implement sysarch(SPARC_UTRAP_INSTALL).
Add code to handle sharing of the user trap table across forks and unsharing
at exec.
This can be used to implement efficient tracking of floating point register
usage in userland, fe by a thread library, and to handle alignment fault
fixups and instruction emulation in userland, for which the code may need
to be different for 32bit and 64bit binaries.
Revision Changes Path
1.8 +7 -0 src/sys/sparc64/include/proc.h
1.18 +47 -1 src/sys/sparc64/sparc64/exception.s
1.28 +10 -0 src/sys/sparc64/sparc64/machdep.c
1.8 +63 -1 src/sys/sparc64/sparc64/sys_machdep.c
1.17 +15 -1 src/sys/sparc64/sparc64/vm_machdep.c
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