sysdeps/unix/alpha/sysdep.h

   1 /* Copyright (C) 1992, 1995, 1996 Free Software Foundation, Inc.
   2    Contributed by Brendan Kehoe (brendan@zen.org).
   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 #include <sysdeps/unix/sysdep.h>
  20
  21 #ifdef ASSEMBLER
  22
  23 #ifdef __linux__
  24 # include <alpha/regdef.h>
  25 #else
  26 # include <regdef.h>
  27 #endif
  28
  29 #ifdef __STDC__
  30 #define LEAF(name, framesize)                   \
  31   .globl name;                                  \
  32   .align 3;                                     \
  33   .ent name, 0;                                 \
  34   name##:                                       \
  35   .frame sp, framesize, ra
  36 #else
  37 #define LEAF(name, framesize)                   \
  38   .globl name;                                  \
  39   .align 3;                                     \
  40   .ent name, 0;                                 \
  41   name/**/:                                     \
  42   .frame sp, framesize, ra
  43 #endif
  44
  45 #ifdef __STDC__
  46 #define ENTRY(name)                             \
  47   .globl name;                                  \
  48   .align 3;                                     \
  49   .ent name, 0;                                 \
  50   name##:                                       \
  51   .frame sp, 0, ra
  52 #else
  53 #define ENTRY(name)                             \
  54   .globl name;                                  \
  55   .align 3;                                     \
  56   .ent name, 0;                                 \
  57   name/**/:                                     \
  58   .frame sp, 0, ra
  59 #endif
  60
  61 /* Mark the end of function SYM.  */
  62 #undef END
  63 #define END(sym)        .end sym
  64
  65 /* Note that PSEUDO/PSEUDO_END use label number 1996---do not use a
  66    label of that number between those two macros!  */
  67
  68 #ifdef __STDC__
  69 #define PSEUDO(name, syscall_name, args)        \
  70     .globl name;                                \
  71     .align 3;                                   \
  72     .ent name,0;                                \
  73                                                 \
  74 name##:                                         \
  75     .frame sp, 0, ra                            \
  76     .prologue 1; /* yes, we do use gp */        \
  77     ldiq        v0, SYS_ify(syscall_name);      \
  78     .set noat;                                  \
  79     call_pal    PAL_callsys;                    \
  80     .set at;                                    \
  81     bne         a3, 1996f;                      \
  82 3:
  83 #else
  84 #define PSEUDO(name, syscall_name, args)        \
  85     .globl name;                                \
  86     .align 3;                                   \
  87     .ent name,0;                                \
  88                                                 \
  89 name/**/:                                       \
  90     .frame sp, 0, ra                            \
  91     .prologue 1; /* yes, we do use gp */        \
  92     ldiq        v0, SYS_ify(syscall_name);      \
  93     .set noat;                                  \
  94     call_pal    PAL_callsys;                    \
  95     .set at;                                    \
  96     bne         a3, 1996f;                      \
  97 3:
  98 #endif
  99
 100 #undef PSEUDO_END
 101
 102 #ifdef PIC
 103 /* When building a shared library, we can use a branch since the text
 104    section of the library is much smaller than 4MB.  If we ever break
 105    this assumption, the linker will tell us.  */
 106 # define PSEUDO_END(sym)                        \
 107 1996:                                           \
 108     br          zero, __syscall_error;          \
 109     END(sym)
 110 #else
 111 # define PSEUDO_END(sym)                        \
 112 1996:                                           \
 113     br          gp, 2f;                         \
 114 2:  ldgp        gp, 0(gp);                      \
 115     jmp         zero, __syscall_error;          \
 116     END(sym)
 117 #endif
 118
 119 #define r0      v0
 120 #define r1      a4
 121
 122 #define MOVE(x,y)       mov x,y
 123
 124 #endif