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Re: page size change on MIPS
- From: naveen yadav <yad dot naveen at gmail dot com>
- To: David Daney <ddaney at caviumnetworks dot com>
- Cc: keshav yadav <keshav dot yadav2005 at gmail dot com>, Ian Lance Taylor <iant at google dot com>, mips-gnu-discuss at codesourcery dot com, gcc-help at gcc dot gnu dot org, Mulyadi Santosa <mulyadi dot santosa at gmail dot com>, libc-help at sourceware dot org
- Date: Mon, 7 Feb 2011 20:52:10 +0530
- Subject: Re: page size change on MIPS
- References: <AANLkTik+vpiWR4Xk4Pu+uCHq3XO=BZMGVka8-B9vuQew@mail.gmail.com><4D3DCB5A.6060107@caviumnetworks.com><AANLkTin6GkKeJATbafP-k9YNcSTHeT8ohDpUD2RLDZ1J@mail.gmail.com><20110131130820.GB26217@linux-mips.org><AANLkTi=UTRk8e6fv3USP5RPKY-Fg0ehGBXrf0bD8NthX@mail.gmail.com><AANLkTimCfioamQWGeRCFFN=OoWE7-PhGs2tCH+_9H=HO@mail.gmail.com><AANLkTinsRxKhw-r0LBzwSMpiYs8eK1G26Z=gWwPuRu=i@mail.gmail.com><mcr4o8j3gwf.fsf@google.com><4D4C39E5.6030403@caviumnetworks.com>
Thanks a lot for your input.
This is o/p for my busybox.I am booting with INITRAMFS. and kernel
version is 2.6.30.9.
I also try latest codesourcery mips toolchain and result is same. I
could not get any hint to debug this issue.
#mips-linux-gnu-readelf -l busybox
Elf file type is EXEC (Executable file)
Entry point 0x400180
There are 5 program headers, starting at offset 52
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
REGINFO 0x0000f4 0x004000f4 0x004000f4 0x00018 0x00018 R 0x4
LOAD 0x000000 0x00400000 0x00400000 0x1a8c6f 0x1a8c6f R E 0x10000
LOAD 0x1a9000 0x005b9000 0x005b9000 0x03170 0x084ac RW 0x10000
NOTE 0x0000d4 0x004000d4 0x004000d4 0x00020 0x00020 R 0x4
TLS 0x1ab464 0x005bb464 0x005bb464 0x00018 0x0004c R 0x4
Section to Segment mapping:
Segment Sections...
00 .reginfo
01 .note.ABI-tag .reginfo .rel.dyn .init .text
__libc_freeres_fn __libc_thread_freeres_fn .fini .rodata
__libc_subfreeres __libc_atexit __libc_thread_subfreeres
.gcc_except_table
02 .eh_frame .tdata .ctors .dtors .jcr .data.rel.ro .data .got
.sdata .sbss .bss __libc_freeres_ptrs
03 .note.ABI-tag
04 .tdata .tbss
On Fri, Feb 4, 2011 at 11:09 PM, David Daney <ddaney@caviumnetworks.com> wrote:
> On 02/04/2011 08:26 AM, Ian Lance Taylor wrote:
>>
>> keshav yadav<keshav.yadav2005@gmail.com> ?writes:
>>
>>> I observe one different behavior when we have page size set to 4KB or
>>> 16KB in kernel busybox receive argc[0] argument correct, but
>>> when page size set to 64KB I am getting argv[0] as empty. So what may
>>> be issue. I am using codesourcercy toolchain.
>>
>> I have no idea what the problem but I know that it is extremely unlikely
>> to have anything to do with gcc.
>>
>
> I agree.
>
> We routinely run programs compiled with a wide variety of stock GCC
> versions, under all three MIPS/Linux ABIs (o32, n32, n64) on kernels with
> 4K, 8K, 16K, 32K and 64K page sizes with no problems.
>
> If you suspect a defect in your toolchain, you could try building a 'stock'
> toolchain with recent Binutils and GCC versions.
>
> David Daney
>