1  /* Assembler macro definitions.  OpenRISC version.
       2     Copyright (C) 2022-2023 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__ */