sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h

   1 /* Copyright (C) 1997, 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Miguel de Icaza <miguel@gnu.ai.mit.edu>, January 1997.
   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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _LINUX_SPARC32_SYSDEP_H
  21 #define _LINUX_SPARC32_SYSDEP_H 1
  22
  23 #include <sysdeps/unix/sparc/sysdep.h>
  24
  25 #ifdef IS_IN_rtld
  26 # include <dl-sysdep.h>         /* Defines RTLD_PRIVATE_ERRNO.  */
  27 #endif
  28 #include <tls.h>
  29
  30 #undef SYS_ify
  31 #define SYS_ify(syscall_name) __NR_##syscall_name
  32
  33 #ifdef __ASSEMBLER__
  34
  35 #define LOADSYSCALL(x) mov __NR_##x, %g1
  36
  37 /* Linux/SPARC uses a different trap number */
  38 #undef PSEUDO
  39 #undef PSEUDO_NOERRNO
  40 #undef PSEUDO_ERRVAL
  41 #undef PSEUDO_END
  42 #undef ENTRY
  43 #undef END
  44 #undef LOC
  45
  46 #define ENTRY(name)                     \
  47         .align  4;                      \
  48         .global C_SYMBOL_NAME(name);    \
  49         .type   name, @function;        \
  50 C_LABEL(name)                           \
  51         cfi_startproc;
  52
  53 #define END(name)                       \
  54         cfi_endproc;                    \
  55         .size name, . - name
  56
  57 #define LOC(name)  .L##name
  58
  59         /* If the offset to __syscall_error fits into a signed 22-bit
  60          * immediate branch offset, the linker will relax the call into
  61          * a normal branch.
  62          */
  63 #define PSEUDO(name, syscall_name, args)        \
  64         .text;                                  \
  65         .globl          __syscall_error;        \
  66 ENTRY(name);                                    \
  67         LOADSYSCALL(syscall_name);              \
  68         ta              0x10;                   \
  69         bcc             1f;                     \
  70          mov            %o7, %g1;               \
  71         call            __syscall_error;        \
  72          mov            %g1, %o7;               \
  73 1:
  74
  75 #define PSEUDO_NOERRNO(name, syscall_name, args)\
  76         .text;                                  \
  77 ENTRY(name);                                    \
  78         LOADSYSCALL(syscall_name);              \
  79         ta              0x10;
  80
  81 #define PSEUDO_ERRVAL(name, syscall_name, args) \
  82         .text;                                  \
  83 ENTRY(name);                                    \
  84         LOADSYSCALL(syscall_name);              \
  85         ta              0x10;
  86
  87 #define PSEUDO_END(name)                        \
  88         END(name)
  89
  90 #else  /* __ASSEMBLER__ */
  91
  92 #define __SYSCALL_STRING                                                \
  93         "ta     0x10;"                                                  \
  94         "bcs    2f;"                                                    \
  95         " nop;"                                                         \
  96         "1:"                                                            \
  97         ".subsection 2;"                                                \
  98         "2:"                                                            \
  99         "save   %%sp, -192, %%sp;"                                      \
 100         "call   __errno_location;"                                      \
 101         " nop;"                                                         \
 102         "st     %%i0,[%%o0];"                                           \
 103         "ba     1b;"                                                    \
 104         " restore %%g0, -1, %%o0;"                                      \
 105         ".previous;"
 106
 107 #define __CLONE_SYSCALL_STRING                                          \
 108         "ta     0x10;"                                                  \
 109         "bcs    2f;"                                                    \
 110         " sub   %%o1, 1, %%o1;"                                         \
 111         "and    %%o0, %%o1, %%o0;"                                      \
 112         "1:"                                                            \
 113         ".subsection 2;"                                                \
 114         "2:"                                                            \
 115         "save   %%sp, -192, %%sp;"                                      \
 116         "call   __errno_location;"                                      \
 117         " nop;"                                                         \
 118         "st     %%i0, [%%o0];"                                          \
 119         "ba     1b;"                                                    \
 120         " restore %%g0, -1, %%o0;"                                      \
 121         ".previous;"
 122
 123 #define __INTERNAL_SYSCALL_STRING                                       \
 124         "ta     0x10;"                                                  \
 125         "bcs,a  1f;"                                                    \
 126         " sub   %%g0, %%o0, %%o0;"                                      \
 127         "1:"
 128
 129 #define __SYSCALL_CLOBBERS "g2", "g3", "g4", "g5", "g6",                \
 130         "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",                 \
 131         "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",           \
 132         "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",         \
 133         "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",         \
 134         "cc", "memory"
 135
 136 #include <sysdeps/unix/sysv/linux/sparc/sysdep.h>
 137
 138 #endif  /* __ASSEMBLER__ */
 139
 140 /* Pointer mangling support.  */
 141 #if defined NOT_IN_libc && defined IS_IN_rtld
 142 /* We cannot use the thread descriptor because in ld.so we use setjmp
 143    earlier than the descriptor is initialized.  */
 144 #else
 145 # ifdef __ASSEMBLER__
 146 #  define PTR_MANGLE(dreg, reg, tmpreg) \
 147   ld    [%g7 + POINTER_GUARD], tmpreg; \
 148   xor   reg, tmpreg, dreg
 149 #  define PTR_DEMANGLE(dreg, reg, tmpreg) PTR_MANGLE (dreg, reg, tmpreg)
 150 #  define PTR_MANGLE2(dreg, reg, tmpreg) \
 151   xor   reg, tmpreg, dreg
 152 #  define PTR_DEMANGLE2(dreg, reg, tmpreg) PTR_MANGLE2 (dreg, reg, tmpreg)
 153 # else
 154 #  define PTR_MANGLE(var) \
 155   (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
 156 #  define PTR_DEMANGLE(var)     PTR_MANGLE (var)
 157 # endif
 158 #endif
 159
 160 #endif /* linux/sparc/sysdep.h */