Hi all,

I mentioned this bug to John some time back, but here's a complete
report. I'm using the stock xldk 2.0 big-endian release
(git://git.xilinx.com/xldk/microblaze_v2.0.git) from earlier this year.

Symptoms:

    * running sqlite3 produces segmentation fault. With LD_DEBUG=all,
the last lines are e.g.:

        143:     relocation processing: /tmp/libsqlite3.so.0.8.6
        Segmentation fault

To reproduce:

    * download and unpack
http://www.sqlite.org/sqlite-autoconf-3070701.tar.gz
    * ./configure --prefix=/usr CC=microblaze-unknown-linux-gnu-gcc
LD=microblaze-unknown-linux-gnu-ld CFLAGS="-O0 -mxl-barrel-shift
-mno-xl-soft-mul -mno-xl-soft-div -msmall-divides -mxl-multiply-high
-mxl-pattern-compare -mcpu=v8.00.b" --build=x86_64-linux-gnu
--host=microblaze-unknown-linux-gnu
    * make
    * run ./sqlite3 on the board. If it gets to a "sqlite>" prompt
without segfaulting, it worked.

To generate a working build:

    * replace -O2 with -O0 in the ./configure step. (-O1 fails too.)

Notes:

    * This package (sqlite3) is notable for a huge, single source file
-- sqlite3.c is 4.5mb.
    * With sqlite3.so.0.8.6 compiled -O0 and sqlite3 compiled -O2, the
build works (i.e. the problem occurs when the .so is optimized)
    * the CPU flags really aren't relevant; I've changed them recently
but the bug has been around for longer.
    * libsqlite3.so.0.8.6 isn't the last "relocation processing" that
occurs when the build works, suggesting it's a gcc/ld/ld.so bug.

Does anyone have suggestions for (a) how to get this bug report to the
right person, and (b) how to provide more useful information than this?

thanks,
Graeme Smecher
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