| /* Copyright (C) 2014-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <setjmp.h> |
| #include <sys/prctl.h> |
| |
| #if __mips_fpr != 0 || _MIPS_SPFPSET != 16 |
| # error This test requires -mfpxx -mno-odd-spreg |
| #endif |
| |
| /* This test verifies that mode changes between a setjmp and longjmp do |
| not corrupt the state of callee-saved registers. */ |
| |
| static int mode[6] = |
| { |
| 0, |
| PR_FP_MODE_FR, |
| PR_FP_MODE_FR | PR_FP_MODE_FRE, |
| PR_FP_MODE_FR, |
| 0, |
| PR_FP_MODE_FR | PR_FP_MODE_FRE |
| }; |
| static jmp_buf env; |
| float check1 = 2.0; |
| double check2 = 3.0; |
| |
| static int |
| do_test (void) |
| { |
| int i; |
| int result = 0; |
| |
| for (i = 0 ; i < 7 ; i++) |
| { |
| int retval; |
| register float test1 __asm ("$f20"); |
| register double test2 __asm ("$f22"); |
| |
| /* Hide what we are doing to $f20 and $f22 from the compiler. */ |
| __asm __volatile ("l.s %0,%2\n" |
| "l.d %1,%3\n" |
| : "=f" (test1), "=f" (test2) |
| : "m" (check1), "m" (check2)); |
| |
| retval = setjmp (env); |
| |
| /* Make sure the compiler knows we want to access the variables |
| via the named registers again. */ |
| __asm __volatile ("" : : "f" (test1), "f" (test2)); |
| |
| if (test1 != check1 || test2 != check2) |
| { |
| printf ("Corrupt register detected: $20 %f = %f, $22 %f = %f\n", |
| test1, check1, test2, check2); |
| result = 1; |
| } |
| |
| if (retval == 0) |
| { |
| if (prctl (PR_SET_FP_MODE, mode[i % 6]) != 0 |
| && errno != ENOTSUP) |
| { |
| printf ("prctl PR_SET_FP_MODE failed: %m"); |
| exit (1); |
| } |
| longjmp (env, 0); |
| } |
| } |
| |
| return result; |
| } |
| |
| #define TEST_FUNCTION do_test () |
| #include "../../test-skeleton.c" |