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openocd/NEWS
David Brownell d91941d5a0 Cortex-M3: improved core exception handling
This updates three aspects of debugger/exception interactions:

 - Save the user's "vector_catch" setting, and restore it after reset.
   Previously, it was obliterated (rather annoyingly) each time.

 - Don't catch BusFault and HardFault exceptions unless the user says
   to do so.  Target firmware may need to handle them.

 - Don't modify SHCSR to prevent escalating BusFault to HardFault.
   Target firmware may expect to handle it as a HardFault.

Those simplifications fix several bugs.  In one annoying case, OpenOCD
would cause the target to lock up on ome faults which triggered after
the debugger disconnected.

NOTE:  a known remaining issue is that OpenOCD can still leave DEMCR
set after an otherwise-clean OpenOCD shutdown.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
2010-01-13 03:17:23 -08:00

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This file includes highlights of the changes made in the
OpenOCD 0.4.0 source archive release. See the repository
history for details about what changed, including bugfixes
and other issues not mentioned here.
JTAG Layer:
Support KT-Link JTAG adapter.
Support USB-JTAG, Altera USB-Blaster and compatibles.
Boundary Scan:
Target Layer:
General
- new "reset-assert" event, for systems without SRST
ARM
- renamed "armv4_5" command prefix as "arm"
- recognize TrustZone "Secure Monitor" mode
- "arm regs" command output changed
- register names use "sp" not "r13"
- add top-level "mcr" and "mrc" commands, replacing
various core-specific operations
- basic semihosting support
ARM11
- Preliminary ETM and ETB hookup
- accelerated "flash erase_check"
- accelerated GDB memory checksum
- support "arm regs" command
- can access all core modes and registers
- watchpoint support
Cortex-A8
- support "arm regs" command
- can access all core modes and registers
- supports "reset-assert" event (used on OMAP3530)
- watchpoint support
Cortex-M3
- Exposed DWT registers like cycle counter
- vector_catch settings not clobbered by resets
- no longer interferes with firmware's fault handling
ETM, ETB
- "trigger_percent" command moved ETM --> ETB
- "etm trigger_debug" command added
MIPS
- use fastdata writes
Freescale DSP563xx cores (partial support)
Flash Layer:
'flash bank' and 'nand device' take <bank_name> as first argument.
With this, flash/NAND commands allow referencing banks by name:
- <bank_name>: reference the bank with its defined name
- <driver_name>[.N]: reference the driver's Nth bank
New 'nand verify' command to check bank against an image file.
The "flash erase_address" command now rejects partial sectors;
previously it would silently erase extra data.
New at91sam9 NAND controller driver.
Board, Target, and Interface Configuration Scripts:
ARM9
- ETM and ETB hookup for iMX2* targets
Add $HOME/.openocd to the search path.
Handle Rev C of LM3S811 eval boards.
- use "luminary-lm3s811.cfg" for older boards
- use "luminary.cfg" for RevC and newer
Core Jim/TCL Scripting:
New 'usage' command to provide terse command help.
Improved command 'help' command output (sorted and indented).
Improved command handling:
- Most boolean settings now accept any of the following:
on/off, enable/disable, true/false, yes/no, 1/0
- More error checking and reporting.
Documentation:
New built-in command development documentation and primer.
Build and Release:
Use --enable-doxygen-pdf to build PDF developer documentation.
Consider upgrading to libftdi 0.17 if you use that library; it
includes bugfixes which improve FT2232H support.
For more details about what has changed since the last release,
see the git repository history. With gitweb, you can browse that
in various levels of detail.
For older NEWS, see the NEWS files associated with each release
(i.e. NEWS-<version>).
For more information about contributing test reports, bug fixes, or new
features and device support, please read the new Developer Manual (or
the BUGS and PATCHES.txt files in the source archive).