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calls.c (emit_library_call_value_1): Use slot_offset instead of offset when calculating bounds for indexing...

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* calls.c (emit_library_call_value_1): Use slot_offset instead of
	offset when calculating bounds for indexing stack_usage_map.  Fixes
	a buffer overflow with certain target setups.

From-SVN: r144317
This commit is contained in:
Jaka Mocnik 2009-02-20 12:19:34 +01:00 committed by Uros Bizjak
parent c69cd1f5cd
commit 5bc0807c06
2 changed files with 8 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2009-02-20 Jaka Mocnik <jaka@xlab.si>
* calls.c (emit_library_call_value_1): Use slot_offset instead of
offset when calculating bounds for indexing stack_usage_map. Fixes
a buffer overflow with certain target setups.
2009-02-20 Jakub Jelinek <jakub@redhat.com>
PR target/39240

4
gcc/calls.c
View File

@ -3646,10 +3646,10 @@ emit_library_call_value_1 (int retval, rtx orgfun, rtx value,
#ifdef ARGS_GROW_DOWNWARD
/* stack_slot is negative, but we want to index stack_usage_map
with positive values. */
upper_bound = -argvec[argnum].locate.offset.constant + 1;
upper_bound = -argvec[argnum].locate.slot_offset.constant + 1;
lower_bound = upper_bound - argvec[argnum].locate.size.constant;
#else
lower_bound = argvec[argnum].locate.offset.constant;
lower_bound = argvec[argnum].locate.slot_offset.constant;
upper_bound = lower_bound + argvec[argnum].locate.size.constant;
#endif