Date: Tue, 19 Dec 1995 06:30:53 -0800 (PST) From: David Greenman <davidg> To: CVS-committers, cvs-sys Subject: cvs commit: src/sys/i386/isa isa.c npx.c Message-ID: <199512191430.GAA02948@freefall.freebsd.org>
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davidg 95/12/19 06:30:52
Modified: sys/i386/i386 exception.s machdep.c trap.c
sys/i386/include cpufunc.h
sys/i386/isa isa.c npx.c
Log:
Implemented a (sorely needed for years) double fault handler to catch stack
overflows.
It sure would be nice if there was an unmapped page between the PCB and
the stack (and that the size of the stack was configurable!). With the
way things are now, the PCB will get clobbered before the double fault
handler gets control, making somewhat of a mess of things. Despite this,
it is still fairly easy to poke around in the overflowed stack to figure
out the cause.
Revision Changes Path
1.13 +1 -3 src/sys/i386/i386/exception.s
1.161 +44 -29 src/sys/i386/i386/machdep.c
1.67 +31 -3 src/sys/i386/i386/trap.c
1.43 +2 -2 src/sys/i386/include/cpufunc.h
1.59 +4 -3 src/sys/i386/isa/isa.c
1.27 +3 -3 src/sys/i386/isa/npx.c
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