1 | //===--- generic-elf-64bit/dynamic_ffi/ffi.cpp -------------------- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | // Provides a mirror to the parts of the FFI interface that the plugins require. |
10 | // |
11 | // libffi |
12 | // - Copyright (c) 2011, 2014, 2019, 2021, 2022 Anthony Green |
13 | // - Copyright (c) 1996-2003, 2007, 2008 Red Hat, Inc. |
14 | // |
15 | //===----------------------------------------------------------------------===// |
16 | |
17 | #ifndef DYNAMIC_FFI_FFI_H |
18 | #define DYNAMIC_FFI_FFI_H |
19 | |
20 | #include <stddef.h> |
21 | #include <stdint.h> |
22 | |
23 | #define USES_DYNAMIC_FFI |
24 | |
25 | uint32_t ffi_init(); |
26 | |
27 | typedef struct _ffi_type { |
28 | size_t size; |
29 | unsigned short alignment; |
30 | unsigned short type; |
31 | struct _ffi_type **elements; |
32 | } ffi_type; |
33 | |
34 | typedef enum { |
35 | FFI_OK = 0, |
36 | FFI_BAD_TYPEDEF, |
37 | FFI_BAD_ABI, |
38 | FFI_BAD_ARGTYPE |
39 | } ffi_status; |
40 | |
41 | // These are target depenent so we set them manually for each ABI by referencing |
42 | // the FFI source. |
43 | typedef enum ffi_abi { |
44 | #if (defined(_M_X64) || defined(__x86_64__)) |
45 | FFI_DEFAULT_ABI = 2, // FFI_UNIX64. |
46 | #elif defined(__aarch64__) || defined(__arm64__) || defined(_M_ARM64) |
47 | FFI_DEFAULT_ABI = 1, // FFI_SYSV. |
48 | #elif defined(__powerpc64__) |
49 | FFI_DEFAULT_ABI = 8, // FFI_LINUX. |
50 | #elif defined(__s390x__) |
51 | FFI_DEFAULT_ABI = 1, // FFI_SYSV. |
52 | #else |
53 | #error "Unknown ABI" |
54 | #endif |
55 | } ffi_cif; |
56 | |
57 | #ifdef __cplusplus |
58 | extern "C" { |
59 | #endif |
60 | |
61 | #define FFI_EXTERN extern |
62 | #define FFI_API |
63 | |
64 | FFI_EXTERN ffi_type ffi_type_void; |
65 | FFI_EXTERN ffi_type ffi_type_pointer; |
66 | |
67 | FFI_API |
68 | void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue); |
69 | |
70 | FFI_API |
71 | ffi_status ffi_prep_cif(ffi_cif *cif, ffi_abi abi, unsigned int nargs, |
72 | ffi_type *rtype, ffi_type **atypes); |
73 | |
74 | #ifdef __cplusplus |
75 | } |
76 | #endif |
77 | |
78 | #endif // DYNAMIC_FFI_FFI_H |
79 | |