1  /* Copyright (C) 1994-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #ifdef __ASSEMBLER__
      19  
      20  /* Get the Mach definitions of ENTRY and kernel_trap.  */
      21  #include <mach/machine/syscall_sw.h>
      22  
      23  /* The Mach definitions assume underscores should be prepended to
      24     symbol names.  Redefine them to do so only when appropriate.  */
      25  #undef EXT
      26  #undef LEXT
      27  #define EXT(x) C_SYMBOL_NAME(x)
      28  #define LEXT(x) C_SYMBOL_NAME(x##:)
      29  
      30  /* For ELF we need to add the `.type' directive to make shared libraries
      31     work right.  */
      32  #undef ENTRY
      33  #undef ENTRY2
      34  #define ENTRY(name) \
      35    .globl name; \
      36    .align ALIGN; \
      37    .type name,@function; \
      38    name:
      39  
      40  #endif
      41  
      42  /* This is invoked by things run when there is random lossage, before they
      43     try to do anything else.  Just to be safe, deallocate the reply port so
      44     bogons arriving on it don't foul up future RPCs.  */
      45  
      46  #ifndef __ASSEMBLER__
      47  #define FATAL_PREPARE_INCLUDE <mach/mig_support.h>
      48  #define FATAL_PREPARE __mig_dealloc_reply_port (__mig_get_reply_port ())
      49  #endif
      50  
      51  /* sysdeps/mach/MACHINE/sysdep.h should define the following macros.  */
      52  
      53  /* Produce a text assembler label for the C global symbol NAME.  */
      54  #ifndef ENTRY
      55  #define ENTRY(name) .error ENTRY not defined by sysdeps/mach/MACHINE/sysdep.h
      56  /* This is not used on all machines.  */
      57  #endif
      58  
      59  /* Set variables ARGC, ARGV, and ENVP for the arguments
      60     left on the stack by the microkernel.  */
      61  #ifndef SNARF_ARGS
      62  #define SNARF_ARGS(argc, argv, envp)
      63  #error SNARF_ARGS not defined by sysdeps/mach/MACHINE/sysdep.h
      64  #endif
      65  
      66  /* LOSE can be defined as the `halt' instruction or something
      67     similar which will cause the process to die in a characteristic
      68     way suggesting a bug.  */
      69  #ifndef LOSE
      70  #define	LOSE	({ volatile int zero = 0; zero / zero; })
      71  #endif
      72  
      73  /* One of these should be defined to specify the stack direction.  */
      74  #if !defined (STACK_GROWTH_UP) && !defined (STACK_GROWTH_DOWN)
      75  #error stack direction unspecified
      76  #endif
      77  
      78  /* Used by some assembly code.  */
      79  #define C_SYMBOL_NAME(name)	name