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Re: display word wrapping
From: |
Juanma Barranquero |
Subject: |
Re: display word wrapping |
Date: |
Mon, 31 May 2004 02:40:19 +0200 |
On Sun, 30 May 2004 20:27:40 +0200, "Eli Zaretskii" <address@hidden> wrote:
> So we are lucky ;-)
Yeah ;)
> [I apologize in advance if I'm going to say things that you already
> know.]
[Don't worry; some things I already know, some not, some I had forgotten
to try...]
> This means Emacs tried to dereference an invalid pointer and read from
> the invalid address. Exception 0xC0000005 is Page Fault, the Windows
> equivalent of SIGSEGV, and the bad address is 0x4 (a.k.a. a NULL
> pointer).
[...]
> How exactly is img->spec invalid? Can you post the details (xtype
> etc.)?
Basically, img points to nowhere, so img->spec is some random value.
> If you change it to
>
> volatile struct image *img;
>
> does the problem go away as well?
No.
> If the clobbered pointer is in a register, then data breakpoint will
> not help, but you could still do it by single-stepping the program and
> looking for a line in the code where the value of that register is
> clobbered.
The register used to store img (edi, in my tests) is being modified by
this call:
img->load_failed_p = img->type->load (f, img) == 0;
If I put
__asm push img
img->load_failed_p = img->type->load (f, img) == 0;
__asm pop img
(which forces a reload of the edi register from the stored value of img),
it works.
More ideas?
/L/e/k/t/u
- Re: display word wrapping, (continued)
- Re: display word wrapping, Jason Rumney, 2004/05/31
- Re: display word wrapping, David Kastrup, 2004/05/31
- Re: display word wrapping, Jason Rumney, 2004/05/28
- Re: display word wrapping, Kim F. Storm, 2004/05/28
- Re: display word wrapping, Juanma Barranquero, 2004/05/28
- Re: display word wrapping, Juanma Barranquero, 2004/05/29
- Re: display word wrapping, Juanma Barranquero, 2004/05/29
- Re: display word wrapping, Eli Zaretskii, 2004/05/30
- Re: display word wrapping, Juanma Barranquero, 2004/05/30
- Re: display word wrapping, Eli Zaretskii, 2004/05/30
- Re: display word wrapping,
Juanma Barranquero <=
- Re: display word wrapping, Eli Zaretskii, 2004/05/31
- Re: display word wrapping, Juanma Barranquero, 2004/05/31
- Re: display word wrapping, Andreas Schwab, 2004/05/31
- Re: display word wrapping, Eli Zaretskii, 2004/05/31
- Re: display word wrapping, Eli Zaretskii, 2004/05/31
- Re: display word wrapping, Juanma Barranquero, 2004/05/31
- Re: display word wrapping, Juanma Barranquero, 2004/05/31
- Re: display word wrapping, Andreas Schwab, 2004/05/31
- Re: display word wrapping, Juanma Barranquero, 2004/05/31
- Re: display word wrapping, Miles Bader, 2004/05/31