sysdeps/mach/mips/sysdep.h

   1 /* Copyright (C) 1996, 1997 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #define LOSE asm volatile ("1: b 1b")
  20
  21 #define START_MACHDEP asm ("\
  22         .text\n\
  23         .globl _start\n\
  24         .ent _start\n\
  25 _start:\n\
  26         # Put initial SP in a0.\n\
  27         move $4, $29\n\
  28         # Jump to _start0; don't return.\n\
  29         j _start0\n\
  30         .end _start\n\
  31 ");
  32 #define START_ARGS      int *entry_sp
  33 #define SNARF_ARGS(argc, argv, envp)                                          \
  34   do                                                                          \
  35     {                                                                         \
  36       register char **p;                                                      \
  37                                                                               \
  38       argc = *entry_sp;                                                       \
  39       argv = (char **) (entry_sp + 1);                                        \
  40       p = argv;                                                               \
  41       while (*p++ != NULL)                                                    \
  42         ;                                                                     \
  43       if (p >= (char **) argv[0])                                             \
  44         --p;                                                                  \
  45       envp = p;                                                       \
  46     } while (0)
  47
  48 #define CALL_WITH_SP(fn, sp) \
  49   ({ register int __fn = fn, __sp = (int) sp; \
  50      asm volatile ("move $sp,%0; j %1" : : "r" (__sp), "r" (__fn));})
  51
  52 #define RETURN_TO(sp, pc, retval) \
  53   asm volatile ("move $29, %0; move $2, %2; move $25, %1; jr $25" \
  54                 : : "r" (sp), "r" (pc), "r" (retval))
  55
  56 #define STACK_GROWTH_DOWN
  57
  58 #include <syscall.h>
  59
  60 #if defined (__ASSEMBLER__)
  61
  62 #define ALIGN   2
  63
  64 #define MOVE(x,y)       move y , x
  65
  66 #define SYSCALL(name, args)     \
  67   .globl syscall_error; \
  68   kernel_trap(name,SYS_##name,args);    \
  69   beq $1,$0,1f; \
  70   j syscall_error;      \
  71 1:
  72
  73 #define SYSCALL__(name, args)   \
  74   .globl syscall_error; \
  75   kernel_trap(__##name,SYS_##name,args);        \
  76   beq $1,$0,1f; \
  77   j syscall_error;      \
  78 1:
  79
  80 #define ret     j ra; nop
  81 #endif
  82
  83 #include <sysdeps/mach/sysdep.h>