Date: Sat, 4 Jan 1997 05:47:34 -0800 (PST) From: Bruce Evans <bde> To: CVS-committers, cvs-all, cvs-sys Subject: cvs commit: src/sys/i386/i386 db_disasm.c Message-ID: <199701041347.FAA20470@freefall.freebsd.org>
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bde 97/01/04 05:47:33
Modified: sys/i386/i386 db_disasm.c
Log:
Fixed botched tables:
- the operands for bt, bts, arpl and `enter' were reversed.
- btr was reported as bts (with the correct operand order).
- cmpxchg was misplaced. It was misplaced differently in the
comments. It is misplaced differently again in the i486 manual.
I put it where the i586 manual and gas say it is.
- fucompp was misplaced.
- the rr table for(s) some versions of fstp, fcom and fcomp was non-null.
This caused some invalid opcodes to be reported as "" instead of as
"<bad instruction>".
- the word and long versions of the fi* instructions were reversed.
- aaa and daa were reversed.
Fixed bugs involving unusual operand sizes:
- 32-bit registers weren't always forced for bswap or for moves to and
from special registers.
- the operand sizes weren't reported for [l]call or [l]jmp.
- displacements weren't truncated mod 2^16 when the operand size was
16-bit.
- too-large displacements and offsets were fetched, and too-large
offsets were reported, when the operand size was 16-bit.
- sign extended immediate bytes were extended too far when the operand
size was 16-bit.
Fixed bugs involving usual operand sizes:
- 8-bit source registers weren't forced for mov[sz]b[wl].
- 16-bit source registers weren't forced for mov[sz]w[wl].
- immediate bytes were sometimes reported as sign extended even for
byte operations. Same for immediate words in word operations.
- the immediate byte was not reported as sign extended for `push'.
Finished Pentium support:
- cpuid, cmpxchg8b and rsm were missing.
Finished i287 support:
- fneni, fndisi and fsetpm were missing. These are harmless nops on
later FPUs.
Improvements:
- report invalid opcodes 0xd6 and 0xf1 using .byte. They are special
in not causing invalid operand exceptions when executed.
- report the immediate byte for unusual aam and aad instuctions.
Immediate bytes other than 0x0a always worked and are documented to
work on Pentiums.
Revision Changes Path
1.17 +147 -128 src/sys/i386/i386/db_disasm.c
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