Hi,
Your problem is probably lack of executable stack support, or at least you
haven't linked your application with a linker mapfile that specifies an
executable stack -- the callbacks require the use of trampolines to access
local variables, which require an executable stack.
--S
Quoting Grégoire Sutre, who wrote the following on Wed, 23 Dec 2009:
Hi,
I am trying to add NetBSD specific code to util/hostdisk.c in order to make
grub-probe work. This part is almost finished. However, I had a hard time
dealing with segfaults in callbacks (hook function pointers) in a number of
places of the vanilla code. Actually, I get segfaults in grub-probe with the
vanilla trunk code (see bug report #28392). This is on NetBSD 5.0 i386.
In the end, these segfaults were fixed by making sure that all variables
accessed by pointers to nested functions are declared static. I attach a
patch that fixes these segfaults on my NetBSD box (this patch is also
included in the bug report).
However, I am not a C expert, and I must be missing something as the code
(obviously) works well on other systems.
Thanks for your help,
Grégoire
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