Bug of 1G memory use.
*Description:*
When allow system using more than 512M of memory, user level apps execution can cause ‘Segmentation fault’ or glibc error.
* Reproduction:*
*On PandaBoard:*
_In bootstrap_: in /base-foc/contrib/l4/mk/platforms/pandaboard.conf/
if set
/PLATFORM_RAM_SIZE_MB = *1024*/
(whole physical memory present on PandaBoard)//
//
And if allow L4Linux using more than 512M memory:
when modify run script: ‘/ports-foc/run/linux_panda.run’:/__
<start name="vmlinux.1" priority="-1">
<binary name="l4linux"/>
<resource name="RAM" quantum="796M"/>
<config args="mem=*754M* l4x_rd=initrd.gz">
<block label="sda" />
</config>
</start>
*(754M* is given for example*)*
System boots up. But user level apps can cause ‘Segmentation fault’ or glibc error.
Error is stable on command ‘*find*’ on fresh-booted system.
*On**QEMU:***
To support 1G of memory on Realview platform file ‘/base-foc/contrib/l4/pkg/bootstrap/server/src/platform/rv.cc’/ (attached) was modified. (Address regions got from platform documentation.)
On system boot below error occurs:
/Assertion failed: 'idx < _nchips' [ret=0xf006f214]/
//Projects/l4bsdd/base-foc/contrib/kernel/fiasco/src/kern/irq_mgr_multi_chip.cpp:76 at f0007c00/
There is no such error if Fiasco.OC was built with –O1 gcc option (only with –O2), but L4Linux can’t boot anyway because of memory allocation error.
Best regards, Vladimir Shilkin