1 /* AMD64 calling conventions checking.
2
3 Copyright 2000, 2001, 2004, 2007 Free Software Foundation, Inc.
4
5 This file is part of the GNU MP Library test suite.
6
7 The GNU MP Library test suite is free software; you can redistribute it
8 and/or modify it under the terms of the GNU General Public License as
9 published by the Free Software Foundation; either version 3 of the License,
10 or (at your option) any later version.
11
12 The GNU MP Library test suite is distributed in the hope that it will be
13 useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15 Public License for more details.
16
17 You should have received a copy of the GNU General Public License along with
18 the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
19
20 #include <stdio.h>
21 #include "gmp-impl.h"
22 #include "tests.h"
23
24
25 /* Vector if constants and register values. We use one vector to allow access
26 via a base pointer, very beneficial for the PIC-enabled amd64call.asm. */
27 mp_limb_t calling_conventions_values[23] =
28 {
29 CNST_LIMB(0x1234567887654321), /* want_rbx */
30 CNST_LIMB(0x89ABCDEFFEDCBA98), /* want_rbp */
31 CNST_LIMB(0xDEADBEEFBADECAFE), /* want_r12 */
32 CNST_LIMB(0xFFEEDDCCBBAA9988), /* want_r13 */
33 CNST_LIMB(0x0011223344556677), /* want_r14 */
34 CNST_LIMB(0x1234432156788765), /* want_r15 */
35
36 CNST_LIMB(0xFEEDABBACAAFBEED), /* JUNK_RAX */
37 CNST_LIMB(0xAB78DE89FF5125BB), /* JUNK_R10 */
38 CNST_LIMB(0x1238901890189031) /* JUNK_R11 */
39
40 /* rest of array used for dynamic values. */
41 };
42
43 /* Index starts for various regions in above vector. */
44 #define WANT 0
45 #define JUNK 6
46 #define SAVE 9
47 #define RETADDR 15
48 #define VAL 16
49 #define RFLAGS 22
50
51 /* values to check */
52 #ifdef __cplusplus
53 extern "C" {
54 #endif
55 struct {
56 int control;
57 int status;
58 int tag;
59 int other[4];
60 } calling_conventions_fenv;
61 #ifdef __cplusplus
62 }
63 #endif
64
65
66 const char *regname[6] = {"rbx", "rbp", "r12", "r13", "r14", "r15"};
67
68 #define DIR_BIT(rflags) (((rflags) & (1<<10)) != 0)
69
70
71 /* Return 1 if ok, 0 if not */
72
73 int
calling_conventions_check(void)74 calling_conventions_check (void)
75 {
76 const char *header = "Violated calling conventions:\n";
77 int ret = 1;
78 int i;
79
80 #define CHECK(callreg, regstr, value) \
81 if (callreg != value) \
82 { \
83 printf ("%s %s got 0x%016lX want 0x%016lX\n", \
84 header, regstr, callreg, value); \
85 header = ""; \
86 ret = 0; \
87 }
88
89 for (i = 0; i < 6; i++)
90 {
91 CHECK (calling_conventions_values[VAL+i], regname[i], calling_conventions_values[WANT+i]);
92 }
93
94 if (DIR_BIT (calling_conventions_values[RFLAGS]) != 0)
95 {
96 printf ("%s rflags dir bit got %d want 0\n",
97 header, DIR_BIT (calling_conventions_values[RFLAGS]));
98 header = "";
99 ret = 0;
100 }
101
102 if ((calling_conventions_fenv.tag & 0xFFFF) != 0xFFFF)
103 {
104 printf ("%s fpu tags got 0x%X want 0xFFFF\n",
105 header, calling_conventions_fenv.tag & 0xFFFF);
106 header = "";
107 ret = 0;
108 }
109
110 return ret;
111 }
112