GNUSH v0903
 

October 5th, 2009

KPIT Cummins Infosystems Limited is releasing the GNUSH v0903 toolchain, which is a cross compiler tool for Renesas (formerly Hitachi and Mitsubishi) SH series of microcontrollers.

SALIENT FEATURES:

1. The GNUSH v0903 toolchain is based on gcc-4.4.1 [released], binutils-2.19.1 [released], newlib-1.17.0 [released], gdb-6.8.50 [dated 27th March 2009].
2. The latest patches are applied to gcc, binutils and newlib sources. Please visit the following link for the patches applied to the GNUSH toolchain,
http://www.kpitgnutools.com/phpmyfaq/index.php?aktion=artikel&rubrik=002004&id=78&lang=en  

3.

The GNUSH v0903 ELF toolchain supports integration with the KPIT GNU Eclipse v1.1.0 and later versions. KPIT GNU Eclipse is an Eclipse based Integrated Development Environment (IDE) providing a user interface to the KPIT GNUSH ELF toolchains (for Windows and Linux).
KPIT GNU Eclipse complements the Renesas HEW IDE and offers users more options for development.
Please visit the following link for more information on KPIT GNU Eclipse,
 http://www.kpitgnutools.com/releaseNotes.php?view=RNDET&RN=365

4. A new 'optimize' attribute has been added from GCC-4.4 onwards to allow programmers to change the optimisation level and particular optimisation options for an individual function.
Sample use of this attribute is shown below,
int foo(int i) __attribute__((optimize("-O3")));

ABOUT GNUSH v0903 :

Release version: GNUSH v0903
Release Date: October 5th, 2009
Platforms Supported: Red Hat GNU/Linux v8.0 or later (or compatible distribution)
Windows NT/2000/XP/Vista
NOTE:  The GNUSH v0903 ELF toolchain works on Windows 7. No issues have been observed on this platform. Windows 7 is not yet officially supported, however.
Language: C, C99, C++
Targets: SH-1

 

SH-2

 

 SH-2A

 

 SH-2E

 

 SH2-DSP

 

 SH-3

 

 SH-3E

 

 SH3-DSP

 

 SH-4

 

 SH-4A

 

 SH-4AL-DSP
Object File Format: ELF

 

CHANGES IN THIS RELEASE:

This section describes the enhancements made and the issues fixed in the v0903 release.

GCC:

1.

When the 'sp_switch' attribute was used for SH targets, compiler generated garbled code for the instruction to assign a new stack pointer (SP) for the interrupt service routine.

The issue has now been fixed.

HEW (For Windows OS only):

1.

Use of the Flash Development Tool (FDT) plug-ins under HEW is deprecated. Hence, users are advised to download the latest version of the FDT application and use it independently for Flash downloads.

 

 KNOWN LIMITATIONS IN SH-ELF:

 

This section describes the known problems in this release. We intend to fix these issues in our future releases.

We occasionally release maintenance packs for critical bugs fixes.

Windows and GNU/Linux:

1. In newlib, 'fmod' function fails with and without "-mrenesas" option for the following single precision targets,
a. SH2E
b. SH2A-Single-Only
c. SH3E
d. SH4-Single-Only (little endian and big endian)
e. SH4A-Single-Only (little endian and big endian)
2. The 'log10', 'ldexp' and 'frexp' functions of optimised libraries fail for SH4-Single-Only (little endian) and SH4A-Single-Only (little endian) targets.
3. Library Generator: Please visit the following link for the known issues and limitations related to this utility,
http://www.kpitgnutools.com/phpmyfaq/index.php?aktion=artikel&rubrik=002003&id=415&lang=en
4.

The SH peripheral registers have strict access size requirements with some registers requiring a byte level access. The GNUSH compiler generates a word level instruction "mov.w" to access these peripheral registers. This type of access currently fails on hardware. Please visit the following link for more details, 

http://www.kpitgnutools.com/phpmyfaq/index.php?aktion=artikel&rubrik=002003&id=430&lang=en

 

HEW (For Windows OS only):

 

1. The following features are currently not supported in HEW:
a. Generate makefile
b. Support for 'convrenesaslib' utility

For other limitations pertaining to the single interface for the compiler, assembler, linker and library generator, please visit the following link,

http://www.kpitgnutools.com/phpmyfaq/index.php?aktion=artikel&rubrik=003001&id=445&lang=en

 

NOTE:

Windows and GNU/Linux:

1. 

The optimised libraries provided along with the Newlib libraries in the toolchain do not require a separate download.

2.

The optimised libraries ('liboptm.a' and 'liboptc.a') are not provided under GNU GPL. The source code of these optimised libraries is neither released nor available on request.

3.

The "libgen" utility is not provided under GNU GPL. The source code of the "libgen" utility is neither released nor available on request.

 

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