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| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/calls.c | 9 |
2 files changed, 15 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index de5799c..944e28c 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2013-12-03 Marek Polacek <polacek@redhat.com> + + PR middle-end/56344 + * calls.c (expand_call): Disallow passing huge arguments + by value. + 2013-12-03 Jakub Jelinek <jakub@redhat.com> PR tree-optimization/59362 diff --git a/gcc/calls.c b/gcc/calls.c index 7d6327f..3963bc2 100644 --- a/gcc/calls.c +++ b/gcc/calls.c @@ -3045,6 +3045,15 @@ expand_call (tree exp, rtx target, int ignore) { rtx before_arg = get_last_insn (); + /* We don't allow passing huge (> 2^30 B) arguments + by value. It would cause an overflow later on. */ + if (adjusted_args_size.constant + >= (1 << (HOST_BITS_PER_INT - 2))) + { + sorry ("passing too large argument on stack"); + continue; + } + if (store_one_arg (&args[i], argblock, flags, adjusted_args_size.var != 0, reg_parm_stack_space) |