| Austin Schuh | dace2a6 | 2020-08-18 10:56:48 -0700 | [diff] [blame] | 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 |
| 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 | } |