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Re: [avr-libc-dev] [bug #29774] prologue/epilogue stack pointer manipul
From: |
Bob Paddock |
Subject: |
Re: [avr-libc-dev] [bug #29774] prologue/epilogue stack pointer manipulation not interrupt safe in XMega |
Date: |
Mon, 7 Jun 2010 14:18:27 -0400 |
On Mon, Jun 7, 2010 at 12:50 PM, Weddington, Eric
<address@hidden> wrote:
> No I don't think it was ever reported. At least I don't remember ever seeing
> anything come across.
I'll file if no one else is going to. On the assumption these
messages are a sufficient report,
as I've not yet seen a problem in my code, and I don't want to wait
until I do. So I do not have a real test case to submit.
The more interrupts that are enabled, and the more frequently that
they occur will make this problem show up.
Murphy usually wins when we play the probabilities of it not happening.
In the interim I just patched my relevant libgcc.a .
This problem is also in __prologue_saves__:
0000817a <__prologue_saves__>:
817a: 2f 92 push r2
817c: 3f 92 push r3
817e: 4f 92 push r4
8180: 5f 92 push r5
8182: 6f 92 push r6
8184: 7f 92 push r7
8186: 8f 92 push r8
8188: 9f 92 push r9
818a: af 92 push r10
818c: bf 92 push r11
818e: cf 92 push r12
8190: df 92 push r13
8192: ef 92 push r14
8194: ff 92 push r15
8196: 0f 93 push r16
8198: 1f 93 push r17
819a: cf 93 push r28
819c: df 93 push r29
819e: cd b7 in r28, 0x3d ; 61
81a0: de b7 in r29, 0x3e ; 62
81a2: ca 1b sub r28, r26
81a4: db 0b sbc r29, r27
81a6: 0f b6 in r0, 0x3f ; 63
81a8: f8 94 cli
81aa: de bf out 0x3e, r29 ; 62
81ac: 0f be out 0x3f, r0 ; 63
81ae: cd bf out 0x3d, r28 ; 61
81b0: 19 94 eijmp
- Re: [avr-libc-dev] [bug #29774] prologue/epilogue stack pointer manipulation not interrupt safe in XMega, Bob Paddock, 2010/06/07
- RE: [avr-libc-dev] [bug #29774] prologue/epilogue stack pointer manipulation not interrupt safe in XMega, Weddington, Eric, 2010/06/07
- Re: [avr-libc-dev] [bug #29774] prologue/epilogue stack pointer manipulation not interrupt safe in XMega,
Bob Paddock <=
- Re: [avr-libc-dev] [bug #29774] prologue/epilogue stack pointer manipulation not interrupt safe in XMega, Galen Seitz, 2010/06/07
- Re: [avr-gcc-list] Re: [avr-libc-dev] [bug #29774] prologue/epilogue stack pointer manipulation not interrupt safe in XMega, Georg Lay, 2010/06/08
- Re: [avr-gcc-list] Re: [avr-libc-dev] [bug #29774] prologue/epilogue stack pointer manipulation not interrupt safe in XMega, Bob Paddock, 2010/06/08
- RE: [avr-gcc-list] Re: [avr-libc-dev] [bug #29774] prologue/epilogue stack pointer manipulation not interrupt safe in XMega, Stu Bell, 2010/06/08
- Re: [avr-gcc-list] Re: [avr-libc-dev] [bug #29774] prologue/epilogue stack pointer manipulation not interrupt safe in XMega, Bob Paddock, 2010/06/08
- RE: [avr-gcc-list] Re: [avr-libc-dev] [bug #29774] prologue/epilogue stack pointer manipulation not interrupt safe in XMega, Weddington, Eric, 2010/06/08
- RE: [avr-gcc-list] Re: [avr-libc-dev] [bug #29774] prologue/epiloguestack pointer manipulation not interrupt safe in XMega, Weddington, Eric, 2010/06/09
- Re: [avr-gcc-list] Re: [avr-libc-dev] [bug #29774] prologue/epilogue stack pointer manipulation not interrupt safe in XMega, Georg Lay, 2010/06/10
- RE: [avr-gcc-list] Re: [avr-libc-dev] [bug #29774] prologue/epilogue stack pointer manipulation not interrupt safe in XMega, Weddington, Eric, 2010/06/10
- Re: [avr-gcc-list] Re: [avr-libc-dev] [bug #29774] prologue/epilogue stack pointer manipulation not interrupt safe in XMega, Matthew, 2010/06/09