| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 2014-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <errno.h> |
| 19 | #include <stdio.h> |
| 20 | #include <stdlib.h> |
| 21 | #include <string.h> |
| 22 | #include <unistd.h> |
| 23 | #include <setjmp.h> |
| 24 | #include <sys/prctl.h> |
| 25 | |
| 26 | #if __mips_fpr != 0 || _MIPS_SPFPSET != 16 |
| 27 | # error This test requires -mfpxx -mno-odd-spreg |
| 28 | #endif |
| 29 | |
| 30 | /* This test verifies that mode changes between a setjmp and longjmp do |
| 31 | not corrupt the state of callee-saved registers. */ |
| 32 | |
| 33 | static int mode[6] = |
| 34 | { |
| 35 | 0, |
| 36 | PR_FP_MODE_FR, |
| 37 | PR_FP_MODE_FR | PR_FP_MODE_FRE, |
| 38 | PR_FP_MODE_FR, |
| 39 | 0, |
| 40 | PR_FP_MODE_FR | PR_FP_MODE_FRE |
| 41 | }; |
| 42 | static jmp_buf env; |
| 43 | float check1 = 2.0; |
| 44 | double check2 = 3.0; |
| 45 | |
| 46 | int |
| 47 | main (void) |
| 48 | { |
| 49 | int i; |
| 50 | int result = 0; |
| 51 | |
| 52 | for (i = 0 ; i < 7 ; i++) |
| 53 | { |
| 54 | int retval; |
| 55 | register float test1 __asm ("$f20"); |
| 56 | register double test2 __asm ("$f22"); |
| 57 | |
| 58 | /* Hide what we are doing to $f20 and $f22 from the compiler. */ |
| 59 | __asm __volatile ("l.s %0,%2\n" |
| 60 | "l.d %1,%3\n" |
| 61 | : "=f" (test1), "=f" (test2) |
| 62 | : "m" (check1), "m" (check2)); |
| 63 | |
| 64 | retval = setjmp (env); |
| 65 | |
| 66 | /* Make sure the compiler knows we want to access the variables |
| 67 | via the named registers again. */ |
| 68 | __asm __volatile ("" : : "f" (test1), "f" (test2)); |
| 69 | |
| 70 | if (test1 != check1 || test2 != check2) |
| 71 | { |
| 72 | printf ("Corrupt register detected: $20 %f = %f, $22 %f = %f\n", |
| 73 | test1, check1, test2, check2); |
| 74 | result = 1; |
| 75 | } |
| 76 | |
| 77 | if (retval == 0) |
| 78 | { |
| 79 | if (prctl (PR_SET_FP_MODE, mode[i % 6]) != 0 |
| 80 | && errno != ENOTSUP) |
| 81 | { |
| 82 | printf ("prctl PR_SET_FP_MODE failed: %m"); |
| 83 | exit (1); |
| 84 | } |
| 85 | longjmp (env, 0); |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | return result; |
| 90 | } |