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svn:author
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bdragon
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svn:date
V 27
2020-01-18T04:12:41.367460Z
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svn:log
V 1914
D23057: [PowerPC] Fix offset calculations in bridge mode

In rS354701, I replaced text relocations with offsets from &generictrap.

Unfortunately, the magic variable I was using doesn't actually mean the
address of &generictrap, in bridge mode it actually means &generictrap64.

So, for bridge mode to work, it is necessary to differentiate between
"where do we need to branch to to handle a trap" and "where is &generictrap
for purposes of doing relative math".

Introduce a new TRAP_ENTRY and use it instead of TRAP_GENTRAP for doing
actual calls to the generic trap handler.

Reported by:	Mark Millard <marklmi@yahoo.com>
Reviewed by:	jhibbits
Sponsored by:	Tag1 Consulting, Inc.
Differential Revision:	https://reviews.freebsd.org/D23057
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M    sys/powerpc/aim/aim_machdep.c
M    sys/powerpc/aim/trap_subr32.S
M    sys/powerpc/aim/trap_subr64.S
M    sys/powerpc/include/trap.h

END