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HomeOther DownloadsIn Wind River Linux 1.4, gcc MIPS bug caused by optimization/MIPS compiler fails to restore GP register after some function calls

Recommended Type: Patch

In Wind River Linux 1.4, gcc MIPS bug caused by optimization/MIPS compiler fails to restore GP register after some function calls

Released: Feb 11, 2009 Updated: Feb 11, 2009

Description

http://gcc.gnu.org/ml/gcc-patches/2008-05/msg01756.html

Compiling with -O0 prevents the compiler from optimizing away the required instructions but is an unacceptable long term solution.

The MIPS compiler appears to optimize away instructions to restore the GP register after some function calls. This causes a problem when the called function clobbers the GP register. This appears to be a known issue in the gcc MIPS compiler.

Product Version

Linux Platforms 1.x

Downloads

WIND00151793.zip

Installation Notes

1. Unzip the patch under [install_dir]/updates

2. Install the patch CD by entering the patch CD directory and run setup_linux.

3. This is a source only patch so you will have to build your packages with the new compiler.

4. Issue a make fs and make the kernel in a configured directory.

5. Upload the kernel and rootfs into the target and boot it up.