binutils-beta-1.94 M68k opcode disassembly

Thread View: gnu.utils.bug

1 messages

[T] Back to Threads [V] Tree View [G] Group Articles

1 total messages Started by Andrew Smith Fri, 14 Aug 1992 03:40

#643

Author: Andrew Smith
Date: Fri, 14 Aug 1992 03:40

18 lines
1313 bytes

The file binutils-beta-1.94/binutils/m68k-pinsn.c has some problems with
exotic 68k opcodes.

1. It has no support for "P", "Y", "X", "W" and "Z" operand types (used by PMMU)

2. It searches the opcode table sequentially i.e. alphabetically, looking for
an opcode which matches the supplied hex opcode. This results in it finding
the floating point instructions Fxxxx before the pmmu ones Pxxxx and displaying
PMMU opcodes as "Fxxxx (cpid=0)" rather than as "unknown" which would be more
useful. Thus, even if you add support for Pxxx opcodes, they will not be found
unless they are placed out of order, before the Fxxx opcode descriptions in "m68k.h".
Is there more correct way of fixing this general problem than just rearranging 
"m68k.h"? It will occur anywhere where there are several alternative decodings
of an opcode.

Andrew Smith
Distributed Network Systems
SynOptics Communications Inc.

Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads