sysdeps/nios2/machine-gmon.h

   1 /* Machine-dependent definitions for profiling support.  Nios II version.
   2    Copyright (C) 1996-2024 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 <sysdep.h>
  20
  21 #define _MCOUNT_DECL(frompc, selfpc) \
  22 static void __attribute_used__ __mcount_internal (u_long frompc, u_long selfpc)
  23
  24 /* This macro/func MUST save r4, r5, r6, r7 and r8 because the compiler inserts
  25    blind calls to mcount(), ignoring the fact that mcount may clobber
  26    registers; therefore, mcount may NOT clobber registers.  */
  27
  28 #if defined(__PIC__) || defined(PIC)
  29 #define NIOS2_MCOUNT_CALL                                     \
  30   "nextpc r3\n\t"                                             \
  31   "1: movhi r2, %hiadj(_gp_got - 1b)\n\t"                     \
  32   "addi r2, r2, %lo(_gp_got - 1b)\n\t"                        \
  33   "add r2, r2, r3\n\t"                                          \
  34   "ldw r2, %call(__mcount_internal)(r2)\n\t"                    \
  35   "callr r2\n\t"
  36 #else
  37 #define NIOS2_MCOUNT_CALL                       \
  38   "call\t__mcount_internal\n\t"
  39 #endif
  40
  41 #define MCOUNT                                          \
  42   asm (".globl _mcount\n\t"                             \
  43        ".type _mcount,@function\n\t"                    \
  44        "_mcount:\n\t"                                   \
  45        "subi sp, sp, 24\n\t"                            \
  46        "stw ra, 20(sp)\n\t"                             \
  47        "stw r8, 16(sp)\n\t"                             \
  48        "stw r7, 12(sp)\n\t"                             \
  49        "stw r6, 8(sp)\n\t"                              \
  50        "stw r5, 4(sp)\n\t"                              \
  51        "stw r4, 0(sp)\n\t"                              \
  52        "mov r4, r8\n\t"                                 \
  53        "mov r5, ra\n\t"                                 \
  54        NIOS2_MCOUNT_CALL                                \
  55        "ldw ra, 20(sp)\n\t"                             \
  56        "ldw r8, 16(sp)\n\t"                             \
  57        "ldw r7, 12(sp)\n\t"                             \
  58        "ldw r6, 8(sp)\n\t"                              \
  59        "ldw r5, 4(sp)\n\t"                              \
  60        "ldw r4, 0(sp)\n\t"                              \
  61        "addi sp, sp, 24\n\t"                            \
  62        "ret\n\t"                                        \
  63        ".size _mcount, . - _mcount\n\t"                 \
  64        );