Fix a signal trampoline bug
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3053 42af7a65-404d-4744-a932-0658087f49c3
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<tr align="center" bgcolor="#e4e4e4">
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<td>
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<h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1>
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<p>Last Updated: October 18, 2010</p>
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<p>Last Updated: October 26, 2010</p>
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</tr>
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</table>
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@ -772,10 +772,10 @@
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</tr>
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</table>
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<p><b>nuttx-5.11 Release Notes</b>:
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<p><b>nuttx-5.12 Release Notes</b>:
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<p>
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This 58<sup>th</sup> release of NuttX, Version 5.11, was made on October 1, 2010 and is available for download from the
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This 59<sup>th</sup> release of NuttX, Version 5.12, was made on October 26, 2010 and is available for download from the
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<a href="http://sourceforge.net/project/showfiles.php?group_id=189573">SourceForge</a> website.
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The change log associated with the release is available <a href="#currentrelease">here</a>.
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Unreleased changes after this release are available in CVS.
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@ -785,26 +785,29 @@
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This is primarily a bugfix release and includes some important corrections to the code:
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<ul>
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<li>
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One very important bug fixes a race condition that can occur using
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semaphores that can be awakened by signals. Under this particular
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race condition, a task could hang waiting for a semaphore.
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</li>
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<li>
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Corrections to lm3s8962 port contributed by Larry Arnold. That
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port is purported to work correctly with these changes in place.
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Fixed an important error in the signal trampoline logic. Essentially,
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interrupts are re-enabled while the signal handler executes, but the
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logic to re-disable the interrupts before returning from the signal
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handler trampoline was missing. Under certain circumstances, this
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can cause stack corruption. This was discovered by David Hewson on
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an ARM9 platform, but since the code has been leveraged, the bug has
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been propogated from ARM to Cortex-M3, AVR32, M16C, SH1, ZNEO, eZ80,
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Z8, and Z80 -- almost every architecture. The correction has been
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incorporated for all architectures but only verified on a few.
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</li>
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</ul>
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</p>
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<p>
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Plus less critical bugfixes as detailed in the ChangeLog. New features
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include:
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Other notable changes in NuttX-5.12 include:
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<ul>
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<li>
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* A new configuration to support the mbed.org LPC1768 board (Contributed
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by Dave Marples), and
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A complete port for the AVR32 (AT91UC3B0256) is incorporated in the
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source tree. Testing of this port is underway now. This release
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was made before verifying this port in order to get the important
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bugfix in place.
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</li>
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<li>
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* A driver for the Atmel AT45DB161D 4Mbit SPI FLASH part.
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Other miscellaneous bugfix and enhancements as noted in the ChangeLog.
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</li>
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</ul>
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</p>
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@ -1342,7 +1345,8 @@
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This port is currently under development.
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All code is complete for the basic NuttX port including header files for all AT91UC3* peripherals.
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Testing of this port is underway now.
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It is hoped that the first, released AVR32 port will appear in version 5.12 of NuttX, probably near the beginning of September, 2010.
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The untest AVR32 is present in the 5.12 release of NuttX.
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It is hoped that the first, verified AVR32 port will be released in version 5.13 of NuttX.
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</p>
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</ul>
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</td>
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@ -1880,28 +1884,31 @@ Other memory:
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</table>
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<ul><pre>
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nuttx-5.11 2010-10-01 Gregory Nutt <spudmonkey@racsa.co.cr>
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nuttx-5.12 2010-10-26 Gregory Nutt <spudmonkey@racsa.co.cr>
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* configs/ea3131/src/up_fillpage.c - Added new configuration item
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CONFIG_PAGING_BINPATH. If CONFIG_PAGING_BINPATH is defined, then it
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is the full path to a file on a mounted file system that contains
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a binary image of the NuttX executable. Pages will be filled by
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reading from offsets into this file that correspond to virtual
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fault addresses. up_fillpage.c implements logic to perform page
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files using the CONFIG_PAGING_BINPATH file.
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* configs/mbed - Add configuration to support the mbed.org LPC1768
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board (Contributed by Dave Marples).
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* sched/sem_wait.c and sem_waitirq.c - Eliminate a race condition
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that can occur when a semaphore wait is interrupt by a signal.
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(see email thread: http://tech.groups.yahoo.com/group/nuttx/message/530)
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* drivers/mtd/at45db.c - Add a driver for the Atmel AT45DB161D 4Mbit
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SPI FLASH part (untested on initial check-in).
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* arch/arm/src/lm3s and arch/arm/include/lm3s - Corrections for the
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lm3s8962 port contributed by Larry Arnold. That port is purported
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to work correctly with these changes in place.
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* examples/ostest/prioinherit.c - Need to reinitialize globals if
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test is ran repeatedly in a loop.
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* configs/ez80f910200zco - Updated to used ZDS-II 4.11.1
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* arch/avr - Add a place to support AVR family processors.
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* arch/avr/include/avr32 and arch/avr/src/avr32 - Add support for AVR32
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(all of the AVR32 is a work in progress).
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* arch/avr/include/at91uc3 and arch/avr/src/at91uc3 - Add support
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for the AT91 UC3A/B family of AVR32 MCUs.
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* confgs/avr32dev1 - Add support for the Atmel AVR32DEV1 board featuring
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the AT91UC3B0256 MCU. This board is produced by www.mcuzone.com.
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* include/stdlib.h, lib/Makefile, lib/lib_abs.c, lib/lib_labs.c,
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lib_labs.c, lib_llabs.c, lib_imaxabs.c - Add abs(), labs(), llabs(), and
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imaxabs().
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* Add include/inttypes.h
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* arch/hc/src/mc9s12ne64 - This hcs12 port grew a few more files. But it
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is still a long way from complete.
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* arch/*/src/*/*_sigdeliver.c - Fixed a serious error in the signal
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trampoline logic. Essentially, interrupts are re-enabled while the
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signal handler executes, but the logic to re-disable the interrupts
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before returning from the signal handler trampoline was missing. Under
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certain circumstances, this can cause stack corruption. This was
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discovered by David Hewson on an ARM9 platform, but since the code
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has been leveraged, the bug has been propogated from ARM to Cortex-M3,
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AVR32, M16C, SH1, ZNEO, eZ80, Z8, and Z80 -- almost every architecture.
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The correction has been incorporated for all architectures but only
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verified on a few.
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pascal-2.0 2009-12-21 Gregory Nutt <spudmonkey@racsa.co.cr>
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@ -1931,18 +1938,7 @@ buildroot-1.8 2009-12-21 <spudmonkey@racsa.co.cr>
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</table>
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<ul><pre>
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nuttx-5.12 2010-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
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* arch/avr - Add a place to support AVR family processors.
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* arch/avr/include/avr32 and arch/avr/src/avr32 - Add support for AVR32
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(all of the AVR32 is a work in progress).
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* arch/avr/include/at91uc3 and arch/avr/src/at91uc3 - Add support
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for the AT91 UC3A/B family of AVR32 MCUs.
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* confgs/avr32dev1 - Add support for the Atmel AVR32DEV1 board featuring
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the AT91UC3B0256 MCU. This board is produced by www.mcuzone.com.
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* include/stdlib.h, lib/Makefile, lib/lib_abs.c, lib/lib_labs.c,
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lib_labs.c, lib_llabs.c, lib_imaxabs.c - Add abs(), labs(), llabs(), and
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imaxabs().
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nuttx-5.13 2010-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
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pascal-2.1 2010-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
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