[Crash-utility] Problem with kvbase for ARM

[Karlsson, Jan]

Earlier _stext has been in the 0xc0008xxx range, but now I see:

c0004000 (A) swapper_pg_dir
c0008000 (t) .head.text
c0008000 (T) _text
c0008000 (T) stext
c000804c (t) __create_page_tables
c0008100 (t) __turn_mmu_on_loc
c000810c (t) __vet_atags
c0100000 (t) .text
c0100000 (T) __exception_text_start
c0100000 (T) _stext
c0100000 (T) asm_do_IRQ
c0100004 (T) do_undefinstr
c010022c (T) do_IPI
c0100230 (T) do_DataAbort
c01003d8 (T) do_PrefetchAbort
c0100470 (T) gic_handle_irq

Jan

Jan Karlsson
Senior Software Engineer
MIB
 
Sony Mobile Communications
Tel: +46703062174
sonymobile.com
 


-----Original Message-----
From: crash-utility-bounces at redhat.com [mailto:crash-utility-bounces at redhat.com] On Behalf Of Dave Anderson
Sent: tisdag den 27 augusti 2013 15:26
To: Discussion list for crash utility usage, maintenance and development
Cc: Fransson, Per 2
Subject: Re: [Crash-utility] Problem with kvbase for ARM



----- Original Message -----
> 
> 
> Hi Dave
> 
> 
> 
> I have problems with the line (in arm.c)
> 
> machdep->kvbase = symbol_value("_stext") & 0xffff0000UL;
> 
> In the latest kernels this does not give the correct value. If I 
> change it to the x86 implementation:
> 
> machdep->kvbase = symbol_value("_stext") & ~KVBASE_MASK;
> 
> where KVBASE_MASK is defined in defs.h
> 
> #define KVBASE_MASK (0x1ffffff)
> 
> Then things work as they should, both on the newer and the older kernels.
> Without this patch crash complains that vmcore and vmlinux does not 
> match and stops.

OK, that can be changed.  Where are the new symbols located?
All the older ARM kernels I have start like this:

 crash> sym -l
 c0004000 (A) swapper_pg_dir
 c0008000 (t) .init
 c0008000 (T) __init_begin
 c0008000 (T) _sinittext
 c0008000 (T) _stext
 c0008000 (T) stext
 c000804c (t) __create_page_tables
 c0008104 (t) __enable_mmu_loc
 c0008110 (t) __enable_mmu
 c0008140 (t) __turn_mmu_on
 c0008158 (t) __enable_mmu_end
 c0008158 (t) __vet_atags
 ...

Dave
 

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