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| author | Anthony Green <green@moxielogic.com> | 2022-05-28 13:53:26 -0400 |
|---|---|---|
| committer | Anthony Green <green@moxielogic.com> | 2022-05-28 13:53:26 -0400 |
| commit | 72c3192773fe483f6517e343ecc3ea468ce73a4f (patch) | |
| tree | 11cd621baced502b2c95ba77598f3be4a2d65580 /src | |
| parent | e409225b41b60c490a094bb068e639a2364202fd (diff) | |
| download | libffi-72c3192773fe483f6517e343ecc3ea468ce73a4f.tar.gz | |
Pass copies of large structs on the stack
Diffstat (limited to 'src')
| -rw-r--r-- | src/moxie/ffi.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/src/moxie/ffi.c b/src/moxie/ffi.c index 1a65660..9d71673 100644 --- a/src/moxie/ffi.c +++ b/src/moxie/ffi.c @@ -1,5 +1,5 @@ /* ----------------------------------------------------------------------- - ffi.c - Copyright (C) 2012, 2013, 2018, 2021 Anthony Green + ffi.c - Copyright (C) 2012, 2013, 2018, 2021, 2022 Anthony Green Moxie Foreign Function Interface @@ -128,6 +128,8 @@ void ffi_call(ffi_cif *cif, void **avalue) { extended_cif ecif; + ffi_type **arg_types = cif->arg_types; + int i, nargs = cif->nargs; ecif.cif = cif; ecif.avalue = avalue; @@ -143,6 +145,20 @@ void ffi_call(ffi_cif *cif, else ecif.rvalue = rvalue; + /* If we have any large structure arguments, make a copy so we are passing + by value. */ + for (i = 0; i < nargs; i++) + { + ffi_type *at = arg_types[i]; + int size = at->size; + if (at->type == FFI_TYPE_STRUCT && size > 16) + { + char *argcopy = alloca (size); + memcpy (argcopy, avalue[i], size); + avalue[i] = argcopy; + } + } + switch (cif->abi) { case FFI_EABI: |