Re: MPC8272 runs application with segmentation fault

Kumar and Andrew,
When I were re-checking the previous mail, I find a mistake about cache line
size.
Now, I can run my program on the MPC8272. (I changed the line size for 256
to 32.)

Thanks a lot for your help.
Dennis

----- Original Message ----- 
From: "Nai-Hsien" <redacted>
To: "Kumar Gala" <redacted>
Cc: <redacted>; "Andrew Williams" <redacted>
Sent: Wednesday, June 08, 2005 10:51 PM
Subject: Re: MPC8272 runs application with segmentation fault

Kumar,
I got the kernel from Montavista version 3.1, which uses Linux kernel
2.4.20.
According to readelf, my libc is version 2.3.2, which is also from
Montavista.

In cputable.c, I already added following entry for MPC8272.

    { /* 827x, 828x (8270, 8275, 8280, 8272 are all 603e cores) */
 0x7fff0000, 0x00820000, "827x & 828x",
 CPU_FTR_SPLIT_ID_CACHE | CPU_FTR_CAN_DOZE | CPU_FTR_USE_TB,
 COMMON_PPC,
 256, 256,
 __setup_cpu_603
    },

Regards
Dennis


----- Original Message ----- 
From: "Kumar Gala" <redacted>
To: "Nai-Hsien" <redacted>
Cc: <redacted>; "Andrew Williams"

[off-list ref]

Sent: Wednesday, June 08, 2005 9:52 PM
Subject: Re: MPC8272 runs application with segmentation fault

quoted

A few questions, where did you get the kernel for the 8272 you are
using?  Can you report back what libc version you are running with.
Also, can see what entry in arch/ppc/kernel/cputable.c has a pvr_value
of 0x00820000 and report that back as well.

- kumar

On Jun 8, 2005, at 8:39 AM, Nai-Hsien wrote:

quoted

Andrew,
I believe I already modify my u-boot to detect the processor.

If I statically link my program, I find that the program can run
on my MPC8272 platform properly, so I think maybe the problem
is caused by shared library. However, the same file system (of course,
same shared library) can run on my MPC8245 platform.

With the observation, I think my kernel is not handling shared library
properly. Is there any part of the kernel I should check?

I added some code in do_page_fault() to dump some information, shown
as below, when my program get problem.

PID=34(console): Trap=300, NIP=0x0ffc6d90, LR=0x0ffc6d20, VM:
(start=0x30000000,
end=0x30017000, flags=0x00000875), addr=0x2e313056
Segmentation fault

Thank you
Dennis


----- Original Message -----
From: Andrew  <mailto:awilliam@nortel.com> Williams
To: Nai-Hsien <mailto:dennis@loop.com.tw>  ;
linuxppc-embedded@ozlabs.org
Sent: Tuesday, June 07, 2005 10:17 PM
Subject: RE: MPC8272 runs application with segmentation fault

Take a alook at the checkcpu() routine in /cpu/mpc8260/cpu.c .
Validate that your CPU is correctly being identified, and thus
initialized.
We had identical symptoms with the 8270.

We added the following after the case for the PVR_8260_HIP7:

        case PVR_8280a_HIP7:
        case PVR_8280_HIP7:
                k = 7;
                printf (CPU_ID_STR " (HiP%d Rev %02x, Mask ", k, rev);
                break;

include/asm-ppc/processor.h

    #define PVR_8280_HIP7   0x80822013
    #define PVR_8280a_HIP7   0x80822014

A.

-----Original Message-----
From: linuxppc-embedded-bounces@ozlabs.org
[mailto:linuxppc-embedded-bounces@ozlabs.org] On Behalf Of Nai-Hsien
Sent: June 7, 2005 9:11 AM
To: linuxppc-embedded@ozlabs.org
Subject: MPC8272 runs application with segmentation fault


Dear experts,

I have two hardware boards, one uses MPC8245 and the other one uses
MPC8272.
Initially, I use the MPC8245 board to port Linux 2.4.20 and write some
applications.
I already do a lot of test on the MPC8245 board and all my application
programs work
fine.

After this, I use the same kernel configuration and same file system
that are being used
by the MPC8245 board to port the whole system to my MPC8272.
Now, I can boot the kernel and run busybox well. However, when
I run my application programs, I always get segmentation fault.
Following is a strace
dump. Could anybody give me some idea?

Thank you
Dennis

====================================================
execve("sbin/console", ["sbin/console"], [/* 6 vars */]) = 0
uname({sys="Linux", node="6200_linux", ...}) = 0
brk(0)                                  = 0x10059134
open("/etc/ld.so.preload", O_RDONLY)    = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY)      = -1 ENOENT (No such file or
directory)
open("/lib/libncurses.so.5", O_RDONLY)  = 3
read(3, "\177ELF\1\2\1\0\0\0\0\0\0\0\0\0\0\3\0\24\0\0\0\1\0\001"...,
1024) = 1024
fstat64(0x3, 0x7ffff098)                = 0
mmap(0xff97000, 362628, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) =
0xff97000
mprotect(0xffd4000, 112772, PROT_NONE)  = 0
mmap(0xffd7000, 86016, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0x30000) = 0xffd7000
mmap(0xffec000, 14468, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffec000
close(3)                                = 0
open("/lib/libdl.so.2", O_RDONLY)       = 3
read(3, "\177ELF\1\2\1\0\0\0\0\0\0\0\0\0\0\3\0\24\0\0\0\1\0\0\34"...,
1024) = 1024
fstat64(0x3, 0x7ffff078)                = 0
mmap(0xff74000, 74812, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) =
0xff74000
mprotect(0xff77000, 62524, PROT_NONE)   = 0
mmap(0xff84000, 12288, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xff84000
close(3)                                = 0
open("/lib/libnsl.so.1", O_RDONLY)      = 3
read(3,
"\177ELF\1\2\1\0\0\0\0\0\0\0\0\0\0\3\0\24\0\0\0\1\0\0A\274"..., 1024)
= 1024
fstat64(0x3, 0x7ffff058)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x30017000
mmap(0xff3e000, 152068, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) =
0xff3e000
mprotect(0xff51000, 74244, PROT_NONE)   = 0
mmap(0xff5e000, 12288, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0x10000) = 0xff5e000
mmap(0xff61000, 8708, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xff61000
close(3)                                = 0
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\1\2\1\0\0\0\0\0\0\0\0\0\0\3\0\24\0\0\0\1\0\1\322"...,
1024) = 1024
fstat64(0x3, 0x7ffff038)                = 0
mmap(0xfddd000, 1379388, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) =
0xfddd000
mprotect(0xff16000, 97340, PROT_NONE)   = 0
mmap(0xff1d000, 61440, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0x130000) = 0xff1d000
mmap(0xff2c000, 7228, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xff2c000
close(3)                                = 0
brk(0)                                  = 0x10059134
brk(0x1005a134)                         = 0x1005a134
brk(0x1005b000)                         = 0x1005b000
write(2, "before init_ncurses()\n", 22) = 22
write(2, "before initscr()\n", 17)      = 17
access("/usr/share/terminfo/v/vt100", R_OK) = 0
open("/usr/share/terminfo/v/vt100", O_RDONLY) = 3
read(3, "\32\1,\0\25\0\7\0\16\1\3\2", 12) = 12
read(3, "vt100|vt100-am|dec vt100 (w/adva"..., 44) = 44
read(3, "\0\1\0\0\1\0\0\0\0\0\0\0\0\0\1\0\0\0\0\0\1", 21) = 21
read(3, "\0", 1)                        = 1
read(3, "P\0\10\0\30\0\377\377\377\377\377\377\3\0", 14) = 14
read(3, "\377\377\0\0\2\0\4\0\25\0\32\0&\0.\0\377\377\377\3777\0"...,
540) = 540
read(3, "\7\0\r\0\33[%i%p1%d;%p2%dr\0\33[3g\0\33[H\33[J"..., 515) =

515

quoted

quoted

read(3, "", 1)                          = 0
read(3, "", 10)                         = 0
close(3)                                = 0
-- SIGSEGV (Segmentation fault) @ 0 (0) ---

+++ killed by SIGSEGV +++

Segmentation fault



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