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

   1 /* Copyright (C) 1997, 2002, 2003, 2004, 2006, 2008
   2    Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Miguel de Icaza <miguel@gnu.ai.mit.edu>, January 1997.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #ifndef _LINUX_SPARC32_SYSDEP_H
  22 #define _LINUX_SPARC32_SYSDEP_H 1
  23
  24 #include <sysdeps/unix/sparc/sysdep.h>
  25
  26 #ifdef IS_IN_rtld
  27 # include <dl-sysdep.h>         /* Defines RTLD_PRIVATE_ERRNO.  */
  28 #endif
  29 #include <tls.h>
  30
  31 #undef SYS_ify
  32 #define SYS_ify(syscall_name) __NR_##syscall_name
  33
  34 #ifdef __ASSEMBLER__
  35
  36 #define LOADSYSCALL(x) mov __NR_##x, %g1
  37
  38 /* Linux/SPARC uses a different trap number */
  39 #undef PSEUDO
  40 #undef PSEUDO_NOERRNO
  41 #undef PSEUDO_ERRVAL
  42 #undef PSEUDO_END
  43 #undef ENTRY
  44 #undef END
  45 #undef LOC
  46
  47 #define ENTRY(name)                     \
  48         .align  4;                      \
  49         .global C_SYMBOL_NAME(name);    \
  50         .type   name, @function;        \
  51 C_LABEL(name)                           \
  52         cfi_startproc;
  53
  54 #define END(name)                       \
  55         cfi_endproc;                    \
  56         .size name, . - name
  57
  58 #define LOC(name)  .L##name
  59
  60         /* If the offset to __syscall_error fits into a signed 22-bit
  61          * immediate branch offset, the linker will relax the call into
  62          * a normal branch.
  63          */
  64 #define PSEUDO(name, syscall_name, args)        \
  65         .text;                                  \
  66         .globl          __syscall_error;        \
  67 ENTRY(name);                                    \
  68         LOADSYSCALL(syscall_name);              \
  69         ta              0x10;                   \
  70         bcc             1f;                     \
  71          mov            %o7, %g1;               \
  72         call            __syscall_error;        \
  73          mov            %g1, %o7;               \
  74 1:
  75
  76 #define PSEUDO_NOERRNO(name, syscall_name, args)\
  77         .text;                                  \
  78 ENTRY(name);                                    \
  79         LOADSYSCALL(syscall_name);              \
  80         ta              0x10;
  81
  82 #define PSEUDO_ERRVAL(name, syscall_name, args) \
  83         .text;                                  \
  84 ENTRY(name);                                    \
  85         LOADSYSCALL(syscall_name);              \
  86         ta              0x10;
  87
  88 #define PSEUDO_END(name)                        \
  89         END(name)
  90
  91 #else  /* __ASSEMBLER__ */
  92
  93 #if defined SHARED && defined DO_VERSIONING && defined PIC \
  94     && !defined NO_HIDDEN && !defined NOT_IN_libc
  95 # define CALL_ERRNO_LOCATION "call   __GI___errno_location;"
  96 #else
  97 # define CALL_ERRNO_LOCATION "call   __errno_location;"
  98 #endif
  99
 100 #define __SYSCALL_STRING                                                \
 101         "ta     0x10;"                                                  \
 102         "bcs    2f;"                                                    \
 103         " nop;"                                                         \
 104         "1:"                                                            \
 105         ".subsection 2;"                                                \
 106         "2:"                                                            \
 107         "save   %%sp, -192, %%sp;"                                      \
 108         CALL_ERRNO_LOCATION                                             \
 109         " nop;"                                                         \
 110         "st     %%i0,[%%o0];"                                           \
 111         "ba     1b;"                                                    \
 112         " restore %%g0, -1, %%o0;"                                      \
 113         ".previous;"
 114
 115 #define __CLONE_SYSCALL_STRING                                          \
 116         "ta     0x10;"                                                  \
 117         "bcs    2f;"                                                    \
 118         " sub   %%o1, 1, %%o1;"                                         \
 119         "and    %%o0, %%o1, %%o0;"                                      \
 120         "1:"                                                            \
 121         ".subsection 2;"                                                \
 122         "2:"                                                            \
 123         "save   %%sp, -192, %%sp;"                                      \
 124         CALL_ERRNO_LOCATION                                             \
 125         " nop;"                                                         \
 126         "st     %%i0, [%%o0];"                                          \
 127         "ba     1b;"                                                    \
 128         " restore %%g0, -1, %%o0;"                                      \
 129         ".previous;"
 130
 131 #define __INTERNAL_SYSCALL_STRING                                       \
 132         "ta     0x10;"                                                  \
 133         "bcs,a  1f;"                                                    \
 134         " sub   %%g0, %%o0, %%o0;"                                      \
 135         "1:"
 136
 137 #define __SYSCALL_CLOBBERS                                              \
 138         "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",                 \
 139         "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",           \
 140         "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",         \
 141         "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",         \
 142         "cc", "memory"
 143
 144 #include <sysdeps/unix/sysv/linux/sparc/sysdep.h>
 145
 146 #endif  /* __ASSEMBLER__ */
 147
 148 /* Pointer mangling support.  */
 149 #if defined NOT_IN_libc && defined IS_IN_rtld
 150 /* We cannot use the thread descriptor because in ld.so we use setjmp
 151    earlier than the descriptor is initialized.  */
 152 #else
 153 # ifdef __ASSEMBLER__
 154 #  define PTR_MANGLE(dreg, reg, tmpreg) \
 155   ld    [%g7 + POINTER_GUARD], tmpreg; \
 156   xor   reg, tmpreg, dreg
 157 #  define PTR_DEMANGLE(dreg, reg, tmpreg) PTR_MANGLE (dreg, reg, tmpreg)
 158 #  define PTR_MANGLE2(dreg, reg, tmpreg) \
 159   xor   reg, tmpreg, dreg
 160 #  define PTR_DEMANGLE2(dreg, reg, tmpreg) PTR_MANGLE2 (dreg, reg, tmpreg)
 161 # else
 162 #  define PTR_MANGLE(var) \
 163   (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
 164 #  define PTR_DEMANGLE(var)     PTR_MANGLE (var)
 165 # endif
 166 #endif
 167
 168 #endif /* linux/sparc/sysdep.h */