sysdeps/or1k/sysdep.h

   1 /* Assembler macro definitions.  OpenRISC version.
   2    Copyright (C) 2022-2024 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 <sysdeps/generic/sysdep.h>
  20 #include <features.h>
  21
  22 #if defined __ASSEMBLER__ || defined REQUEST_ASSEMBLER_MACROS
  23
  24 /* Make use of .size directive.  */
  25 #define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
  26
  27 /* Define an entry point visible from C.  */
  28 #define ENTRY(name)                                                           \
  29   .globl C_SYMBOL_NAME(name);                                                 \
  30   .type C_SYMBOL_NAME(name),@function;                                        \
  31   .align 4;                                                                   \
  32   C_LABEL(name)                                                               \
  33   cfi_startproc;                                                              \
  34   CALL_MCOUNT
  35
  36 #undef  END
  37 #define END(name)                                                             \
  38   cfi_endproc;                                                                \
  39   ASM_SIZE_DIRECTIVE(name)
  40
  41 /* Since C identifiers are not normally prefixed with an underscore
  42    on this system, the asm identifier `syscall_error' intrudes on the
  43    C name space.  Make sure we use an innocuous name.  */
  44 #define syscall_error   __syscall_error
  45
  46 /* If compiled for profiling, call `mcount' at the start of each function.  */
  47 #ifdef  PROF
  48 # ifdef __PIC__
  49 #  define CALL_MCOUNT                                           \
  50         l.addi  r1, r1, -8;                                     \
  51         l.sw    0(r1), r9;                                      \
  52         l.sw    4(r1), r3;                                      \
  53         l.ori   r3, r9, 0;                                      \
  54         l.j     plt(_mcount);                                   \
  55          l.nop;                                                 \
  56         l.lwz   r9, 0(r1);                                      \
  57         l.lwz   r3, 4(r1);                                      \
  58         l.addi  r1, r1, 8;
  59 # else
  60 #  define CALL_MCOUNT                                           \
  61         l.addi  r1, r1, -8;                                     \
  62         l.sw    0(r1), r9;                                      \
  63         l.sw    4(r1), r3;                                      \
  64         l.ori   r3, r9, 0;                                      \
  65         l.movhi r15, hi(_mcount);                               \
  66         l.ori   r15, r15, lo(_mcount);                          \
  67         l.jr    r15;                                            \
  68          l.nop;                                                 \
  69         l.lwz   r9, 0(r1);                                      \
  70         l.lwz   r3, 4(r1);                                      \
  71         l.addi  r1, r1, 8;
  72 # endif
  73 #else
  74 # define CALL_MCOUNT             /* Do nothing.  */
  75 #endif
  76
  77 /* Local label name for asm code.  */
  78 #define L(name)         .L##name
  79
  80 #endif /* __ASSEMBLER__ */