1  /* Assembler macros for m68k.
       2     Copyright (C) 1998-2023 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  
      21  #ifdef __ASSEMBLER__
      22  
      23  /* Define an entry point visible from C.
      24  
      25     There is currently a bug in gdb which prevents us from specifying
      26     incomplete stabs information.  Fake some entries here which specify
      27     the current source file.  */
      28  # define ENTRY(name)							      \
      29    .globl C_SYMBOL_NAME(name);						      \
      30    .type C_SYMBOL_NAME(name),@function;					      \
      31    .p2align 2;								      \
      32    C_LABEL(name)								      \
      33    cfi_startproc;							      \
      34    CALL_MCOUNT
      35  
      36  # undef END
      37  # define END(name)							      \
      38    cfi_endproc;								      \
      39    .size name,.-name
      40  
      41  
      42  /* If compiled for profiling, call `_mcount' at the start of each function.  */
      43  # ifdef	PROF
      44  /* The mcount code relies on a normal frame pointer being on the stack
      45     to locate our caller, so push one just for its benefit.  */
      46  #  define CALL_MCOUNT \
      47    move.l %fp, -(%sp);							      \
      48    cfi_adjust_cfa_offset (4);  cfi_rel_offset (%a6, 0);			      \
      49    move.l %sp, %fp;							      \
      50    jbsr JUMPTARGET (_mcount);						      \
      51    move.l (%sp)+, %fp;							      \
      52    cfi_adjust_cfa_offset (-4); cfi_restore (%a6);
      53  # else
      54  #  define CALL_MCOUNT		/* Do nothing.  */
      55  # endif
      56  
      57  # define PSEUDO(name, syscall_name, args)				      \
      58    .globl __syscall_error;						      \
      59    ENTRY (name)								      \
      60      DO_CALL (syscall_name, args);					      \
      61      jcc JUMPTARGET(__syscall_error)
      62  
      63  # undef PSEUDO_END
      64  # define PSEUDO_END(name)						      \
      65    END (name)
      66  
      67  # undef JUMPTARGET
      68  # ifdef PIC
      69  #  define JUMPTARGET(name)	name##@PLTPC
      70  # else
      71  #  define JUMPTARGET(name)	name
      72  # endif
      73  
      74  #endif	/* __ASSEMBLER__ */