gdb/testsuite/gdb.arch/powerpc-aix-prologue.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2004-2020 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 void li_stw (void);
  19
  20 void stack_check_probe_1 (void);
  21 void stack_check_probe_2 (void);
  22 void stack_check_probe_loop_1 (void);
  23 void stack_check_probe_loop_2 (void);
  24
  25 int
  26 main (void)
  27 {
  28   li_stw ();
  29   stack_check_probe_1 ();
  30   stack_check_probe_2 ();
  31   stack_check_probe_loop_1 ();
  32   stack_check_probe_loop_2 ();
  33   return 0;
  34 }
  35
  36 /* Asm for procedure li_stw().
  37
  38    The purpose of this function is to verify that GDB does not
  39    include the li insn as part of the function prologue (only part
  40    of the prologue if part of a pair of insns saving vector registers).
  41    Similarly, GDB should not include the stw insn following the li insn,
  42    because the source register is not used for parameter passing.  */
  43
  44
  45 asm ("        .csect .text[PR]\n"
  46      "        .align 2\n"
  47      "        .lglobl .li_stw\n"
  48      "        .csect li_stw[DS]\n"
  49      "li_stw:\n"
  50      "        .long .li_stw, TOC[tc0], 0\n"
  51      "        .csect .text[PR]\n"
  52      ".li_stw:\n"
  53      "        stw 31,-4(1)\n"
  54      "        stwu 1,-48(1)\n"
  55      "        mr 31,1\n"
  56      "        stw 11,24(31)\n"
  57      "        li 0,8765\n"
  58      "        stw 0,28(31)\n"
  59      "        lwz 1,0(1)\n"
  60      "        lwz 31,-4(1)\n"
  61      "        blr\n");
  62
  63 /* Asm for procedure stack_check_probe_1().
  64
  65    The purpose of this function is to verify that GDB can skip the stack
  66    checking probing at the beginning of the prologue.  */
  67
  68 asm ("        .csect .text[PR]\n"
  69      "        .align 2\n"
  70      "        .globl stack_check_probe_1\n"
  71      "        .globl .stack_check_probe_1\n"
  72      "        .csect stack_check_probe_1[DS]\n"
  73      "stack_check_probe_1:\n"
  74      "        .long .stack_check_probe_1, TOC[tc0], 0\n"
  75      "        .csect .text[PR]\n"
  76      ".stack_check_probe_1:\n"
  77      "        stw 0,-12336(1)\n"
  78      "        stw 31,-4(1)\n"
  79      "        stwu 1,-48(1)\n"
  80      "        mr 31,1\n"
  81      "        lwz 1,0(1)\n"
  82      "        lwz 31,-4(1)\n"
  83      "        blr\n");
  84
  85 /* Asm for procedure stack_check_probe_2 ().
  86
  87    Similar to stack_check_probe_1, but with a different probing sequence
  88    (several probes).  */
  89
  90 asm ("        .csect .text[PR]\n"
  91      "        .align 2\n"
  92      "        .globl stack_check_probe_2\n"
  93      "        .globl .stack_check_probe_2\n"
  94      "        .csect stack_check_probe_2[DS]\n"
  95      "stack_check_probe_2:\n"
  96      "        .long .stack_check_probe_2, TOC[tc0], 0\n"
  97      "        .csect .text[PR]\n"
  98      ".stack_check_probe_2:\n"
  99      "        stw 0,-16384(1)\n"
 100      "        stw 0,-20480(1)\n"
 101      "        stw 0,-24576(1)\n"
 102      "        stw 0,-28672(1)\n"
 103      "        stw 0,-28752(1)\n"
 104      "        mflr 0\n"
 105      "        stw 31,-4(1)\n"
 106      "        stw 0,8(1)\n"
 107      "        stwu 1,-16464(1)\n"
 108      "        mr 31,1\n"
 109      "        lwz 1,0(1)\n"
 110      "        lwz 0,8(1)\n"
 111      "        mtlr 0\n"
 112      "        lwz 31,-4(1)\n"
 113      "        blr\n");
 114
 115 /* Asm for procedure stack_check_probe_loop_1() and stack_check_probe_loop_2().
 116
 117    Similar to stack_check_probe_1, but with a different probing sequence
 118    (probing loop).  */
 119
 120 asm ("        .csect .text[PR]\n"
 121      "        .align 2\n"
 122      "        .globl stack_check_probe_loop_1\n"
 123      "        .globl .stack_check_probe_loop_1\n"
 124      "        .csect stack_check_probe_loop_1[DS]\n"
 125      "stack_check_probe_loop_1:\n"
 126      "        .long .stack_check_probe_loop_1, TOC[tc0], 0\n"
 127      "        .csect .text[PR]\n"
 128      ".stack_check_probe_loop_1:\n"
 129      "        addi 12,1,-12288\n"
 130      "        lis 0,-8\n"
 131      "        ori 0,0,4096\n"
 132      "        add 0,12,0\n"
 133      "LPSRL1..0:\n"
 134      "        cmpw 0,12,0\n"
 135      "        beq 0,LPSRE1..0\n"
 136      "        addi 12,12,-4096\n"
 137      "        stw 0,0(12)\n"
 138      "        b LPSRL1..0\n"
 139      "LPSRE1..0:\n"
 140      "        stw 0,-4080(12)\n"
 141      "        mflr 0\n"
 142      "        stw 31,-4(1)\n"
 143      "        stw 0,8(1)\n"
 144      "        lis 0,0xfff8\n"
 145      "        ori 0,0,16\n"
 146      "        stwux 1,1,0\n"
 147      "        mr 31,1\n"
 148      "        lwz 1,0(1)\n"
 149      "        lwz 0,8(1)\n"
 150      "        mtlr 0\n"
 151      "        lwz 31,-4(1)\n"
 152      "        blr\n");
 153
 154 asm ("        .csect .text[PR]\n"
 155      "        .align 2\n"
 156      "        .globl stack_check_probe_loop_2\n"
 157      "        .globl .stack_check_probe_loop_2\n"
 158      "        .csect stack_check_probe_loop_2[DS]\n"
 159      "stack_check_probe_loop_2:\n"
 160      "        .long .stack_check_probe_loop_2, TOC[tc0], 0\n"
 161      "        .csect .text[PR]\n"
 162      ".stack_check_probe_loop_2:\n"
 163      "        addi 12,1,-12288\n"
 164      "        lis 0,-8\n"
 165      "        add 0,12,0\n"
 166      "LPSRL2..0:\n"
 167      "        cmpw 0,12,0\n"
 168      "        beq 0,LPSRE2..0\n"
 169      "        addi 12,12,-4096\n"
 170      "        stw 0,0(12)\n"
 171      "        b LPSRL2..0\n"
 172      "LPSRE2..0:\n"
 173      "        mflr 0\n"
 174      "        stw 31,-4(1)\n"
 175      "        stw 0,8(1)\n"
 176      "        lis 0,0xfff8\n"
 177      "        ori 0,0,16\n"
 178      "        stwux 1,1,0\n"
 179      "        mr 31,1\n"
 180      "        lwz 1,0(1)\n"
 181      "        lwz 0,8(1)\n"
 182      "        mtlr 0\n"
 183      "        lwz 31,-4(1)\n"
 184      "        blr\n");