Fix alignment issue on ppc64le

4d0cc66daf88f477f3a11262d0e2e093f9397e2c.patch

@@ -0,0 +1,59 @@
+From 4d0cc66daf88f477f3a11262d0e2e093f9397e2c Mon Sep 17 00:00:00 2001
+From: Armin Rigo <arigo@tunes.org>
+Date: Tue, 29 Mar 2022 11:48:33 +0200
+Subject: [PATCH] Issue #531
+
+on ppc64le, libffi requires 16 bytes alignment for at least the return
+value of functions if that is 'long double'.
+---
+ c/_cffi_backend.c | 11 ++++++++---
+ 1 file changed, 8 insertions(+), 3 deletions(-)
+
+diff --git a/c/_cffi_backend.c b/c/_cffi_backend.c
+index ffecbf9a..ce2cacd9 100644
+--- a/c/_cffi_backend.c
++++ b/c/_cffi_backend.c
+@@ -5665,7 +5665,8 @@ static ffi_type *fb_fill_type(struct funcbuilder_s *fb, CTypeDescrObject *ct,
+     }
+ }
+ 
+-#define ALIGN_ARG(n)  ((n) + 7) & ~7
++#define ALIGN_TO(n, a)  ((n) + ((a)-1)) & ~((a)-1)
++#define ALIGN_ARG(n)    ALIGN_TO(n, 8)
+ 
+ static int fb_build(struct funcbuilder_s *fb, PyObject *fargs,
+                     CTypeDescrObject *fresult)
+@@ -5690,10 +5691,12 @@ static int fb_build(struct funcbuilder_s *fb, PyObject *fargs,
+         /* exchange data size */
+         /* first, enough room for an array of 'nargs' pointers */
+         exchange_offset = nargs * sizeof(void*);
++        /* then enough room for the result --- which means at least
++           sizeof(ffi_arg), according to the ffi docs, but we also
++           align according to the result type, for issue #531 */
++        exchange_offset = ALIGN_TO(exchange_offset, fb->rtype->alignment);
+         exchange_offset = ALIGN_ARG(exchange_offset);
+         cif_descr->exchange_offset_arg[0] = exchange_offset;
+-        /* then enough room for the result --- which means at least
+-           sizeof(ffi_arg), according to the ffi docs */
+         i = fb->rtype->size;
+         if (i < (Py_ssize_t)sizeof(ffi_arg))
+             i = sizeof(ffi_arg);
+@@ -5721,6 +5724,7 @@ static int fb_build(struct funcbuilder_s *fb, PyObject *fargs,
+         if (fb->atypes != NULL) {
+             fb->atypes[i] = atype;
+             /* exchange data size */
++            exchange_offset = ALIGN_TO(exchange_offset, atype->alignment);
+             exchange_offset = ALIGN_ARG(exchange_offset);
+             cif_descr->exchange_offset_arg[1 + i] = exchange_offset;
+             exchange_offset += atype->size;
+@@ -5737,6 +5741,7 @@ static int fb_build(struct funcbuilder_s *fb, PyObject *fargs,
+ }
+ 
+ #undef ALIGN_ARG
++#undef ALIGN_TO
+ 
+ static void fb_cat_name(struct funcbuilder_s *fb, const char *piece,
+                         int piecelen)
+-- 
+GitLab
+

python-cffi.spec

@@ -1,12 +1,15 @@
 Name:           python-cffi
 %global general_version 1.15.0
 Version:        %{general_version}%{?prerel:~%{prerel}}
-Release:        4%{?dist}
+Release:        5%{?dist}
 Summary:        Foreign Function Interface for Python to call C code
 License:        MIT
 URL:            https://cffi.readthedocs.org/
 Source0:        %{pypi_source cffi}
 Patch1:         https://foss.heptapod.net/pypy/cffi/-/commit/871bae572cafc3afb81eb13705945f0a6f708d54.patch
+# on ppc64le, libffi requires 16 bytes alignment for at least the return
+# value of functions if that is 'long double':
+Patch2:         https://foss.heptapod.net/pypy/cffi/-/commit/4d0cc66daf88f477f3a11262d0e2e093f9397e2c.patch
 
 BuildRequires: make
 BuildRequires:  libffi-devel
@@ -70,6 +73,10 @@ PYTHONPATH=%{buildroot}%{python3_sitearch} %{__python3} -m pytest c/ testing/
 %doc doc/build/html
 
 %changelog
+* Wed Mar 30 2022 Miro Hrončok <mhroncok@redhat.com> - 1.15.0-5
+- Fix alignment issue on ppc64le
+- Fixes: rhbz#2046865
+
 * Wed Feb 02 2022 Tomáš Hrnčiar <thrnciar@redhat.com> - 1.15.0-4
 - Backport patch to fix compatibility with Python 3.11
 - Fixes: rhbz#2040165