diff options
| author | Quentin Carbonneaux <quentin.carbonneaux@yale.edu> | 2015-08-18 17:19:08 -0400 |
|---|---|---|
| committer | Quentin Carbonneaux <quentin.carbonneaux@yale.edu> | 2015-09-15 23:01:31 -0400 |
| commit | 17cba8793e759bd8b4a96bb1dc5b3fd51b7cde65 (patch) | |
| tree | 84477456ea0eafcbfdc478eb1f310079f83d8540 | |
| parent | f8cd43adc4f95cecfaa7346f7fcdad98633f1b07 (diff) | |
| download | roux-17cba8793e759bd8b4a96bb1dc5b3fd51b7cde65.tar.gz | |
add comment about variadic functions in abi
| -rw-r--r-- | lisc/ABI | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lisc/ABI b/lisc/ABI index 735b631..d7088d4 100644 --- a/lisc/ABI +++ b/lisc/ABI @@ -36,6 +36,9 @@ Passing: on the stack. - When all registers are taken, write arguments on the stack from right to left. + - When calling a variadic function, %al stores the number + of vector registers used to pass arguments (it must be + an upper bound and does not have to be exact). - Registers %rbx, %r12 - %r15 are callee-save. Returning. |