* page size change on MIPS
[not found] ` <AANLkTimCfioamQWGeRCFFN=OoWE7-PhGs2tCH+_9H=HO@mail.gmail.com>
@ 2011-02-04 6:02 ` keshav yadav
2011-02-04 9:40 ` keshav yadav
2011-02-04 16:50 ` Ian Lance Taylor
0 siblings, 2 replies; 7+ messages in thread
From: keshav yadav @ 2011-02-04 6:02 UTC (permalink / raw)
To: mips-gnu-discuss, gcc-help, gcc-help
Hi All,
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.
Kind regards
---------- Forwarded message ----------
From: naveen yadav <yad.naveen@gmail.com>
Date: Fri, Feb 4, 2011 at 9:46 AM
Subject: Re: page size change on MIPS
To: Ralf Baechle <ralf@linux-mips.org>
Cc: kernelnewbies@nl.linux.org, Himanshu Aggarwal
<lkml.himanshu@gmail.com>, David Daney <ddaney@caviumnetworks.com>,
linux-mips@linux-mips.org
Hi, I am adding readelf info also .
mips-linux-gnu-readelf -S squashfs-root/bin/busybox
There are 35 section headers, starting at offset 0x174290:
Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf Al
[ 0] NULL 00000000 000000 000000 00 0 0 0
[ 1] .note.ABI-tag NOTE 004000d4 0000d4 000020 00 A 0 0 4
[ 2] .reginfo MIPS_REGINFO 004000f4 0000f4 000018 18 A 0 0 4
[ 3] .rel.dyn REL 0040010c 00010c 000010 08 A 0 0 4
[ 4] .init PROGBITS 0040011c 00011c 00005c 00 AX 0 0 4
[ 5] .text PROGBITS 00400180 000180 11d2b0 00 AX 0 0 16
[ 6] __libc_freeres_fn PROGBITS 0051d430 11d430 001368 00 AX 0 0 4
[ 7] __libc_thread_fre PROGBITS 0051e798 11e798 000148 00 AX 0 0 4
[ 8] .fini PROGBITS 0051e8e0 11e8e0 000034 00 AX 0 0 4
[ 9] .rodata PROGBITS 0051e920 11e920 02d560 00 A 0 0 16
[10] __libc_subfreeres PROGBITS 0054be80 14be80 000058 00 A 0 0 4
[11] __libc_atexit PROGBITS 0054bed8 14bed8 000004 00 A 0 0 4
[12] __libc_thread_sub PROGBITS 0054bedc 14bedc 000008 00 A 0 0 4
[13] .gcc_except_table PROGBITS 0054bee4 14bee4 0001fb 00 A 0 0 1
[14] .eh_frame PROGBITS 0055c0e0 14c0e0 002464 00 WA 0 0 4
[15] .tdata PROGBITS 0055e544 14e544 000018 00 WAT 0 0 4
[16] .tbss NOBITS 0055e55c 14e55c 000034 00 WAT 0 0 4
[17] .ctors PROGBITS 0055e55c 14e55c 000008 00 WA 0 0 4
[18] .dtors PROGBITS 0055e564 14e564 00000c 00 WA 0 0 4
[19] .jcr PROGBITS 0055e570 14e570 000004 00 WA 0 0 4
[20] .data.rel.ro PROGBITS 0055e574 14e574 000030 00 WA 0 0 4
[21] .data PROGBITS 0055e5b0 14e5b0 000b30 00 WA 0 0 16
[22] .got PROGBITS 0055f0e0 14f0e0 000148 04 WAp 0 0 16
[23] .sdata PROGBITS 0055f228 14f228 000004 00 WAp 0 0 4
[24] .sbss NOBITS 0055f230 14f22c 000184 00 WAp 0 0 8
[25] .bss NOBITS 0055f3c0 14f22c 00516c 00 WA 0 0 16
[26] __libc_freeres_pt NOBITS 0056452c 14f22c 000040 00 WA 0 0 4
[27] .pdr PROGBITS 00000000 14f22c 016880 00 0 0 4
[28] .comment PROGBITS 00000000 165aac 0027e0 00 0 0 1
[29] .debug_frame MIPS_DWARF 00000000 16828c 00be88 00 0 0 4
[30] .gnu.attributes LOOS+ffffff5 00000000 174114 000010 00 0 0 1
[31] .mdebug.abi32 PROGBITS 000030c0 174124 000000 00 0 0 1
[32] .shstrtab STRTAB 00000000 174124 00016c 00 0 0 1
[33] .symtab SYMTAB 00000000 174808 015320 10
34 2843 4
[34] .strtab STRTAB 00000000 189b28 012f65 00 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings)
I (info), L (link order), G (group), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
On Fri, Feb 4, 2011 at 8:54 AM, naveen yadav <yad.naveen@gmail.com> wrote:
> thanaks a lot for your suggestion ..
>
>
> I debug this issue further, and here is my observations:
>
> 1. If I replace init with simple static link executable binary, this
> can be executed.
> 2. In case of busy-box, I debug the reason why init fails to excute.
>
> When I execute init command from busybox the control goes in main()
> function of busybox(appletlib.c) with argv value
> as the command you are suppose to execute, which in our case is init.
>
> But when i check argv is coming null when page size is 64KB and it
> comes init when page size is 16KB.
>
> This behaviour is very strange and i am still debugging this issue.
>
>
> I have check in Glibc, the max_page size it support is 64 KB in
> codesourcercy toolchain 4.4.1
>
> How can I check alignment issue as mention by Mr. Ralf Baechle.
>
>
>
> Kind regards
>
>
>
>
> On Mon, Jan 31, 2011 at 6:38 PM, Ralf Baechle <ralf@linux-mips.org> wrote:
>> On Sun, Jan 30, 2011 at 08:32:43PM +0530, Himanshu Aggarwal wrote:
>>
>>> Why should the application or the toolchains depend on pagesize? I am
>>> not very clear on this. Can someone explain it?
>>
>> To allow loading directly with mmap the executable file's layout must
>> be such that it's it's segments are on offsets that are a multiple of
>> the page size so in turn the linker must know that alignment.
>>
>> Ralf
>>
>
_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
^ permalink raw reply [flat|nested] 7+ messages in thread
* page size change on MIPS
2011-02-04 6:02 ` page size change on MIPS keshav yadav
@ 2011-02-04 9:40 ` keshav yadav
2011-02-04 16:50 ` Ian Lance Taylor
1 sibling, 0 replies; 7+ messages in thread
From: keshav yadav @ 2011-02-04 9:40 UTC (permalink / raw)
To: mips-gnu-discuss, gcc-help, gcc-help
Hi All,
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.
Kind regards
---------- Forwarded message ----------
From: naveen yadav <yad.naveen@gmail.com>
Date: Fri, Feb 4, 2011 at 9:46 AM
Subject: Re: page size change on MIPS
To: Ralf Baechle <ralf@linux-mips.org>
Cc: kernelnewbies@nl.linux.org, Himanshu Aggarwal
<lkml.himanshu@gmail.com>, David Daney <ddaney@caviumnetworks.com>,
linux-mips@linux-mips.org
Hi, I am adding readelf info also .
mips-linux-gnu-readelf -S squashfs-root/bin/busybox
There are 35 section headers, starting at offset 0x174290:
Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf Al
[ 0] NULL 00000000 000000 000000 00 0 0 0
[ 1] .note.ABI-tag NOTE 004000d4 0000d4 000020 00 A 0 0 4
[ 2] .reginfo MIPS_REGINFO 004000f4 0000f4 000018 18 A 0 0 4
[ 3] .rel.dyn REL 0040010c 00010c 000010 08 A 0 0 4
[ 4] .init PROGBITS 0040011c 00011c 00005c 00 AX 0 0 4
[ 5] .text PROGBITS 00400180 000180 11d2b0 00 AX 0 0 16
[ 6] __libc_freeres_fn PROGBITS 0051d430 11d430 001368 00 AX 0 0 4
[ 7] __libc_thread_fre PROGBITS 0051e798 11e798 000148 00 AX 0 0 4
[ 8] .fini PROGBITS 0051e8e0 11e8e0 000034 00 AX 0 0 4
[ 9] .rodata PROGBITS 0051e920 11e920 02d560 00 A 0 0 16
[10] __libc_subfreeres PROGBITS 0054be80 14be80 000058 00 A 0 0 4
[11] __libc_atexit PROGBITS 0054bed8 14bed8 000004 00 A 0 0 4
[12] __libc_thread_sub PROGBITS 0054bedc 14bedc 000008 00 A 0 0 4
[13] .gcc_except_table PROGBITS 0054bee4 14bee4 0001fb 00 A 0 0 1
[14] .eh_frame PROGBITS 0055c0e0 14c0e0 002464 00 WA 0 0 4
[15] .tdata PROGBITS 0055e544 14e544 000018 00 WAT 0 0 4
[16] .tbss NOBITS 0055e55c 14e55c 000034 00 WAT 0 0 4
[17] .ctors PROGBITS 0055e55c 14e55c 000008 00 WA 0 0 4
[18] .dtors PROGBITS 0055e564 14e564 00000c 00 WA 0 0 4
[19] .jcr PROGBITS 0055e570 14e570 000004 00 WA 0 0 4
[20] .data.rel.ro PROGBITS 0055e574 14e574 000030 00 WA 0 0 4
[21] .data PROGBITS 0055e5b0 14e5b0 000b30 00 WA 0 0 16
[22] .got PROGBITS 0055f0e0 14f0e0 000148 04 WAp 0 0 16
[23] .sdata PROGBITS 0055f228 14f228 000004 00 WAp 0 0 4
[24] .sbss NOBITS 0055f230 14f22c 000184 00 WAp 0 0 8
[25] .bss NOBITS 0055f3c0 14f22c 00516c 00 WA 0 0 16
[26] __libc_freeres_pt NOBITS 0056452c 14f22c 000040 00 WA 0 0 4
[27] .pdr PROGBITS 00000000 14f22c 016880 00 0 0 4
[28] .comment PROGBITS 00000000 165aac 0027e0 00 0 0 1
[29] .debug_frame MIPS_DWARF 00000000 16828c 00be88 00 0 0 4
[30] .gnu.attributes LOOS+ffffff5 00000000 174114 000010 00 0 0 1
[31] .mdebug.abi32 PROGBITS 000030c0 174124 000000 00 0 0 1
[32] .shstrtab STRTAB 00000000 174124 00016c 00 0 0 1
[33] .symtab SYMTAB 00000000 174808 015320 10
34 2843 4
[34] .strtab STRTAB 00000000 189b28 012f65 00 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings)
I (info), L (link order), G (group), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
On Fri, Feb 4, 2011 at 8:54 AM, naveen yadav <yad.naveen@gmail.com> wrote:
> thanaks a lot for your suggestion ..
>
>
> I debug this issue further, and here is my observations:
>
> 1. If I replace init with simple static link executable binary, this
> can be executed.
> 2. In case of busy-box, I debug the reason why init fails to excute.
>
> When I execute init command from busybox the control goes in main()
> function of busybox(appletlib.c) with argv value
> as the command you are suppose to execute, which in our case is init.
>
> But when i check argv is coming null when page size is 64KB and it
> comes init when page size is 16KB.
>
> This behaviour is very strange and i am still debugging this issue.
>
>
> I have check in Glibc, the max_page size it support is 64 KB in
> codesourcercy toolchain 4.4.1
>
> How can I check alignment issue as mention by Mr. Ralf Baechle.
>
>
>
> Kind regards
>
>
>
>
> On Mon, Jan 31, 2011 at 6:38 PM, Ralf Baechle <ralf@linux-mips.org> wrote:
>> On Sun, Jan 30, 2011 at 08:32:43PM +0530, Himanshu Aggarwal wrote:
>>
>>> Why should the application or the toolchains depend on pagesize? I am
>>> not very clear on this. Can someone explain it?
>>
>> To allow loading directly with mmap the executable file's layout must
>> be such that it's it's segments are on offsets that are a multiple of
>> the page size so in turn the linker must know that alignment.
>>
>> Ralf
>>
>
_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: page size change on MIPS
2011-02-04 6:02 ` page size change on MIPS keshav yadav
2011-02-04 9:40 ` keshav yadav
@ 2011-02-04 16:50 ` Ian Lance Taylor
2011-02-04 17:47 ` David Daney
1 sibling, 1 reply; 7+ messages in thread
From: Ian Lance Taylor @ 2011-02-04 16:50 UTC (permalink / raw)
To: keshav yadav; +Cc: mips-gnu-discuss, gcc-help
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.
Ian
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: page size change on MIPS
2011-02-04 16:50 ` Ian Lance Taylor
@ 2011-02-04 17:47 ` David Daney
2011-02-07 16:11 ` naveen yadav
0 siblings, 1 reply; 7+ messages in thread
From: David Daney @ 2011-02-04 17:47 UTC (permalink / raw)
To: keshav yadav; +Cc: Ian Lance Taylor, mips-gnu-discuss, gcc-help
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
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: page size change on MIPS
2011-02-04 17:47 ` David Daney
@ 2011-02-07 16:11 ` naveen yadav
2011-02-07 23:47 ` David Daney
0 siblings, 1 reply; 7+ messages in thread
From: naveen yadav @ 2011-02-07 16:11 UTC (permalink / raw)
To: David Daney
Cc: keshav yadav, Ian Lance Taylor, mips-gnu-discuss, gcc-help,
Mulyadi Santosa, libc-help
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
>
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: page size change on MIPS
2011-02-07 16:11 ` naveen yadav
@ 2011-02-07 23:47 ` David Daney
2011-02-08 8:43 ` naveen yadav
0 siblings, 1 reply; 7+ messages in thread
From: David Daney @ 2011-02-07 23:47 UTC (permalink / raw)
To: naveen yadav
Cc: keshav yadav, Ian Lance Taylor, mips-gnu-discuss, gcc-help,
Mulyadi Santosa, libc-help
On 02/07/2011 07:22 AM, naveen yadav wrote:
> 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.
>
The Debian mips/mipsel root filesystems will work with 64K pages.
Install Debian, then use a chroot environment to debug your root
filesystem. You should even be able to do that from within qemu.
>
> #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
>
Why are you statically linking glibc? That is usually never a good idea.
Other than that it looks reasonably sane.
> 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
>>
>
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: page size change on MIPS
2011-02-07 23:47 ` David Daney
@ 2011-02-08 8:43 ` naveen yadav
0 siblings, 0 replies; 7+ messages in thread
From: naveen yadav @ 2011-02-08 8:43 UTC (permalink / raw)
To: David Daney
Cc: keshav yadav, Ian Lance Taylor, mips-gnu-discuss, gcc-help,
Mulyadi Santosa, libc-help
Hi All,
I debug this issue further, I check in kernel File name is
binfmt_elf.c and function name is create_elf_tables()
I put a debug print here to check what kernel is reading from user space.
if (__put_user((elf_addr_t)p, argv++))
return -EFAULT;
len = strnlen_user((void __user *)p, MAX_ARG_STRLEN);
printk("\n Lenght of arg=%ld,%s \n",len,(void __user *)p);
if (!len || len > MAX_ARG_STRLEN)
return -EINVAL;
p += len;
}
when Page size is 16KB o/p is
Lenght of arg=6,/init
when Page size is 64KB o/p is
Lenght of arg=1,
so I got null when it read from ELF
On Tue, Feb 8, 2011 at 5:13 AM, David Daney <ddaney@caviumnetworks.com> wrote:
> On 02/07/2011 07:22 AM, naveen yadav wrote:
>>
>> 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.
>>
>
> The Debian mips/mipsel root filesystems will work with 64K pages.
>
> Install Debian, then use a chroot environment to debug your root filesystem.
> You should even be able to do that from within qemu.
>
>
>
>
>>
>> #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
>>
>
> Why are you statically linking glibc? That is usually never a good idea.
>
> Other than that it looks reasonably sane.
>
>
>> 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
>>>
>>
>
>
^ permalink raw reply [flat|nested] 7+ messages in thread
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2011-02-04 6:02 ` page size change on MIPS keshav yadav
2011-02-04 9:40 ` keshav yadav
2011-02-04 16:50 ` Ian Lance Taylor
2011-02-04 17:47 ` David Daney
2011-02-07 16:11 ` naveen yadav
2011-02-07 23:47 ` David Daney
2011-02-08 8:43 ` naveen yadav
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