Greg,
On 3 Oct 2012, at 3:06 PM, Larry Baker wrote:
> In the mean time, I'll try using _end instead of __stack_start for the stack
> limit symbol.
gcc -fstack-limit-symbol=_end works.
> I don't know the ld scripting language. I will try to figure out how to
> define __start_stack to have the same value as, for example, .bss _end.
Here's a patch that corrects the definition of __stack_start in elf2flt.ld.in:
--- elf2flt-orig/elf2flt.ld.in
+++ elf2flt/elf2flt.ld.in
@@ -172,3 +172,3 @@
@SYMBOL_PREFIX@_stack_start = .;
- }
+ } > flatmem
With the patch, gcc -fstack-limit-symbol=__stack_start works. Please have the
people that maintain elf2flt take a look at it.
That is, the stack check trips and the program exits without clobbering the
stack. It is silent, though -- there is no indication that SIGILL occurred. I
still haven't figured out how to enable a message and/or register dump when
this happens.
Larry Baker
US Geological Survey
650-329-5608
ba...@usgs.gov
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