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Author SHA1 Message Date
Ulrich Drepper 98b1e6c866 ____longjmp_chk is now OS-specific. 
We use sigaltstack internally which on some systems is a syscall
and should be used as such.  Move the x86-64 version to the Linux
specific directory and create in its place a file which always
causes compile errors.
 2009-07-30 21:42:27 -07:00
Ulrich Drepper 8e80581787 Change code a bit to correct CFI. 2009-07-30 21:29:27 -07:00
Ulrich Drepper 07df809969 Optimize ____longjmp_chk for x86-64 a bit. 2009-07-30 20:09:30 -07:00
Ulrich Drepper 5ead9ce5c7 Fix x86-64 ____longjmp_chk to handle signal stacks. 
The simple test previously used might trigger if the longjmp jumps
from the signal stack to the normal stack.  We now explicitly test
for this case.
 2009-07-30 17:31:48 -07:00
Ulrich Drepper b50f8e42ba Check for valid stack frame in longjmp. 
If longjmp restores the stack frame to an address which is beyond
the stack frame at the time of the longjmp call it would install
an uninitialized stack frame.  If compiled with _FORTIFY_SOURCE
defined, longjmp will now bail out in this situation.
 2009-05-15 19:37:13 -07:00