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Date: Tue, 13 Sep 2005 14:22:13 -0300
From: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org>
To: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
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Subject: Re: gdb hangs on Linux 2.6.11 on 8xx
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Hi Marcelo,
	after the last Chris post, I decided to double check if I wasn't doing
something wrong. vanilla 2.6.13 hangs in the same way my patched 2.6.10 does.

> How does the disassemble of __switch_to looks like? 
from 2.6.13 kernel
Dump of assembler code for function __switch_to:
0xc00055a4 <__switch_to+0>:     mflr    r0
0xc00055a8 <__switch_to+4>:     stwu    r1,-16(r1)
0xc00055ac <__switch_to+8>:     stw     r31,12(r1)
0xc00055b0 <__switch_to+12>:    mr      r11,r4
0xc00055b4 <__switch_to+16>:    stw     r0,20(r1)
0xc00055b8 <__switch_to+20>:    mfmsr   r31
0xc00055bc <__switch_to+24>:    rlwinm  r0,r31,0,17,15
0xc00055c0 <__switch_to+28>:    mtmsr   r0
0xc00055c4 <__switch_to+32>:    lwz     r10,460(r4)
0xc00055c8 <__switch_to+36>:    addi    r3,r2,456
0xc00055cc <__switch_to+40>:    addi    r4,r4,456
0xc00055d0 <__switch_to+44>:    cmpwi   cr7,r10,0
0xc00055d4 <__switch_to+48>:    beq-    cr7,0xc00055e8 <__switch_to+68>
0xc00055d8 <__switch_to+52>:    lis     r9,-16354
0xc00055dc <__switch_to+56>:    lwz     r0,28880(r9)
0xc00055e0 <__switch_to+60>:    cmpw    cr7,r0,r11
0xc00055e4 <__switch_to+64>:    beq-    cr7,0xc0005604 <__switch_to+96>
0xc00055e8 <__switch_to+68>:    bl      0xc0003024 <_switch>
0xc00055ec <__switch_to+72>:    mtmsr   r31
0xc00055f0 <__switch_to+76>:    lwz     r0,20(r1)
0xc00055f4 <__switch_to+80>:    lwz     r31,12(r1)
0xc00055f8 <__switch_to+84>:    addi    r1,r1,16
0xc00055fc <__switch_to+88>:    mtlr    r0
0xc0005600 <__switch_to+92>:    blr
0xc0005604 <__switch_to+96>:    lwz     r0,132(r10)
0xc0005608 <__switch_to+100>:   oris    r0,r0,512
0xc000560c <__switch_to+104>:   stw     r0,132(r10)
0xc0005610 <__switch_to+108>:   b       0xc00055e8 <__switch_to+68>
End of assembler dump.

> Chris oopsen is exactly what the 'icbi' patch fixes.
notice that what I'm having here is not an oops

but if for Chris works, I must be doing something wrong, sorry for the noise

-- 
Aristeu