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David Brownell <david-b@pacbell.net>:

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Initial support for disassembling Thumb2 code.  This works only for
Cortex-M3 cores so far.  Eventually other cores will also need Thumb2
support ... but they don't yet support any kind of disassembly.

 - Update the 16-bit Thumb decoder:
 
     * Understand CPS, REV*, SETEND, {U,S}XT{B,H} opcodes added
       by ARMv6.  (It already seems to treat CPY as MOV.)

     * Understand CB, CBNZ, WFI, IT, and other opcodes added by
       in Thumb2.

 - A new Thumb2 instruction decode routine is provided.
 
     * This has a different signature:  pass the target, not the
       instruction, so it can fetch a second halfword when needed.  
       The instruction size is likewise returned to the caller.

     * 32-bit instructions are recognized but not yet decoded.
   
 - Start using the current "UAL" syntax in some cases.  "SWI" is
   renamed as "SVC"; "LDMIA" as "LDM"; "STMIA" as "STM".

 - Define a new "cortex_m3 disassemble addr count" command to give
   access to this disassembly.

Sanity checked against "objdump -d" output; a bunch of the new
instructions checked out fine.


git-svn-id: svn://svn.berlios.de/openocd/trunk@2530 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
zwelch
2009-07-15 23:39:37 +00:00
parent 2ff59c9aaf
commit 309870e414
4 changed files with 300 additions and 17 deletions
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5
doc/openocd.texi
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@@ -5003,6 +5003,11 @@ If @var{value} is defined, first assigns that.
@subsection Cortex-M3 specific commands
@cindex Cortex-M3
@deffn Command {cortex_m3 disassemble} address count
@cindex disassemble
Disassembles @var{count} Thumb2 instructions starting at @var{address}.
@end deffn
@deffn Command {cortex_m3 maskisr} (@option{on}|@option{off})
Control masking (disabling) interrupts during target step/resume.
@end deffn