gdb/testsuite/gdb.trace/trace-common.h

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2011-2018 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #ifdef SYMBOL_PREFIX
  19 #define SYMBOL(str)     SYMBOL_PREFIX #str
  20 #else
  21 #define SYMBOL(str)     #str
  22 #endif
  23
  24 /* FAST_TRACEPOINT_LABEL expands to an assembly instruction large enough to fit
  25    a fast tracepoint jump.  The parameter is the label where we'll set
  26    tracepoints and breakpoints.  */
  27
  28 #if (defined __x86_64__ || defined __i386__)
  29
  30 static void
  31 x86_trace_dummy ()
  32 {
  33   int x = 0;
  34   int y = x + 4;
  35 }
  36
  37 #define FAST_TRACEPOINT_LABEL(name) \
  38   asm ("    .global " SYMBOL(name) "\n" \
  39        SYMBOL(name) ":\n" \
  40        "    call " SYMBOL(x86_trace_dummy) "\n" \
  41        )
  42
  43 #elif (defined __aarch64__) || (defined __powerpc__)
  44
  45 #define FAST_TRACEPOINT_LABEL(name) \
  46   asm ("    .global " SYMBOL(name) "\n" \
  47        SYMBOL(name) ":\n" \
  48        "    nop\n" \
  49        )
  50
  51 #elif (defined __s390__)
  52
  53 #define FAST_TRACEPOINT_LABEL(name) \
  54   asm ("    .global " SYMBOL(name) "\n" \
  55        SYMBOL(name) ":\n" \
  56        "    mvc 0(8, %r15), 0(%r15)\n" \
  57        )
  58
  59 #else
  60
  61 #error "unsupported architecture for trace tests"
  62
  63 #endif