sysdeps/unix/sysv/linux/mips/mips32/bug-getcontext-mips-gp.c

   1 /* Tests register values retreived by getcontext() for mips o32.
   2    Copyright (C) 2017-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <ucontext.h>
  24
  25
  26 #if !defined __mips__ || _MIPS_SIM != _ABIO32
  27 # error "MIPS O32 specific test."
  28 #endif
  29
  30 #define SP_REG 29
  31
  32 static int
  33 do_test (void)
  34 {
  35   ucontext_t ctx;
  36   memset (&ctx, 0, sizeof (ctx));
  37   int status = getcontext (&ctx);
  38   if (status)
  39     {
  40       printf ("\ngetcontext() failed, errno: %d.\n", errno);
  41       return 1;
  42     }
  43
  44   if (ctx.uc_mcontext.gregs[SP_REG] == 0
  45       || ctx.uc_mcontext.gregs[SP_REG] > 0xffffffff)
  46     {
  47       printf ("\nError getcontext(): invalid $sp = 0x%llx.\n",
  48               ctx.uc_mcontext.gregs[SP_REG]);
  49       return 1;
  50     }
  51
  52   if (ctx.uc_mcontext.pc == 0
  53       || ctx.uc_mcontext.pc > 0xffffffff)
  54     {
  55       printf ("\nError getcontext(): invalid ctx.uc_mcontext.pc = 0x%llx.\n",
  56               ctx.uc_mcontext.pc);
  57       return 1;
  58     }
  59
  60   return 0;
  61 }
  62
  63 #include <support/test-driver.c>