sysdeps/mach/alpha/sysdep.h

   1 /* Copyright (C) 1994 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 Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 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 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #define MOVE(x,y)       mov x, y
  20
  21 #define LOSE asm volatile ("call_pal 0") /* halt */
  22
  23 #define START_MACHDEP \
  24   asm ("_start: mov     $30, $16\n" /* Put initial SP in a0.  */              \
  25        "        br      $27, 1f\n" /* Load GP from PC.  */                    \
  26        "1:      ldgp    $29, 0($27)\n"                                        \
  27        "        jmp     $26, _start0"); /* Jump to _start0; don't return.  */
  28 #define START_ARGS      char **sparg
  29 #define SNARF_ARGS(argc, argv, envp) \
  30   (envp = &(argv = &sparg[1])[(argc = *(int *) sparg) + 1])
  31
  32 #define CALL_WITH_SP(fn, sp) \
  33   ({ register long int __fn = (long int) fn, __sp = (long int) sp; \
  34      asm volatile ("mov %0,$30; jmp $31, (%1); ldgp $29, 0(%1)" \
  35                    : : "r" (__sp), "r" (__fn)); })
  36
  37 #define ENTRY(name) LEAF(name, ***loser no arg count***)
  38
  39 #define STACK_GROWTH_DOWN
  40
  41 #include_next <sysdep.h>