sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h

   1 /* Copyright (C) 1997, 2000, 2002, 2003, 2004, 2006, 2008
   2    Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 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_SPARC64_SYSDEP_H
  22 #define _LINUX_SPARC64_SYSDEP_H 1
  23
  24 #include <sysdeps/unix/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 /* This is a kludge to make syscalls.list find these under the names
  35    pread and pwrite, since some kernel headers define those names
  36    and some define the *64 names for the same system calls.  */
  37 #if !defined __NR_pread && defined __NR_pread64
  38 # define __NR_pread __NR_pread64
  39 #endif
  40 #if !defined __NR_pwrite && defined __NR_pwrite64
  41 # define __NR_pwrite __NR_pwrite64
  42 #endif
  43
  44 #ifdef __ASSEMBLER__
  45
  46 #define LOADSYSCALL(x) mov __NR_##x, %g1
  47
  48 /* Linux/SPARC uses a different trap number */
  49 #undef PSEUDO
  50 #undef PSEUDO_NOERRNO
  51 #undef PSEUDO_ERRVAL
  52 #undef PSEUDO_END
  53 #undef ENTRY
  54 #undef END
  55
  56 #define ENTRY(name)                     \
  57         .align  4;                      \
  58         .global C_SYMBOL_NAME(name);    \
  59         .type   name, @function;        \
  60 C_LABEL(name)                           \
  61         cfi_startproc;
  62
  63 #define END(name)                       \
  64         cfi_endproc;                    \
  65         .size name, . - name
  66
  67         /* If the offset to __syscall_error fits into a signed 22-bit
  68          * immediate branch offset, the linker will relax the call into
  69          * a normal branch.
  70          */
  71 #define PSEUDO(name, syscall_name, args)        \
  72         .text;                                  \
  73         .globl          __syscall_error;        \
  74 ENTRY(name);                                    \
  75         LOADSYSCALL(syscall_name);              \
  76         ta              0x6d;                   \
  77         bcc,pt          %xcc, 1f;               \
  78          mov            %o7, %g1;               \
  79         call            __syscall_error;        \
  80          mov            %g1, %o7;               \
  81 1:
  82
  83 #define PSEUDO_NOERRNO(name, syscall_name, args)\
  84         .text;                                  \
  85 ENTRY(name);                                    \
  86         LOADSYSCALL(syscall_name);              \
  87         ta              0x6d;
  88
  89 #define PSEUDO_ERRVAL(name, syscall_name, args) \
  90         .text;                                  \
  91 ENTRY(name);                                    \
  92         LOADSYSCALL(syscall_name);              \
  93         ta              0x6d;
  94
  95 #define PSEUDO_END(name)                        \
  96         END(name)
  97
  98
  99 /* Careful here!  This "ret" define can interfere; use jmpl if unsure.  */
 100 #define ret             retl; nop
 101 #define ret_NOERRNO     retl; nop
 102 #define ret_ERRVAL      retl; nop
 103 #define r0              %o0
 104 #define r1              %o1
 105 #define MOVE(x,y)       mov x, y
 106
 107 #else  /* __ASSEMBLER__ */
 108
 109 #if defined SHARED && defined DO_VERSIONING && defined PIC \
 110     && !defined NO_HIDDEN && !defined NOT_IN_libc
 111 # define CALL_ERRNO_LOCATION "call   __GI___errno_location;"
 112 #else
 113 # define CALL_ERRNO_LOCATION "call   __errno_location;"
 114 #endif
 115
 116 #define __SYSCALL_STRING                                                \
 117         "ta     0x6d;"                                                  \
 118         "bcc,pt %%xcc, 1f;"                                             \
 119         " nop;"                                                         \
 120         "save   %%sp, -192, %%sp;"                                      \
 121         CALL_ERRNO_LOCATION                                             \
 122         " nop;"                                                         \
 123         "st     %%i0,[%%o0];"                                           \
 124         "restore %%g0, -1, %%o0;"                                       \
 125         "1:"
 126
 127 #define __CLONE_SYSCALL_STRING                                          \
 128         "ta     0x6d;"                                                  \
 129         "bcc,pt %%xcc, 1f;"                                             \
 130         " sub   %%o1, 1, %%o1;"                                         \
 131         "save   %%sp, -192, %%sp;"                                      \
 132         CALL_ERRNO_LOCATION                                             \
 133         " mov   -1, %%i1;"                                              \
 134         "st     %%i0,[%%o0];"                                           \
 135         "restore %%g0, -1, %%o0;"                                       \
 136         "1:"                                                            \
 137         "and    %%o0, %%o1, %%o0"
 138
 139 #define __INTERNAL_SYSCALL_STRING                                       \
 140         "ta     0x6d;"                                                  \
 141         "bcs,a,pt %%xcc, 1f;"                                           \
 142         " sub   %%g0, %%o0, %%o0;"                                      \
 143         "1:"
 144
 145 #define __SYSCALL_CLOBBERS                                              \
 146         "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",                 \
 147         "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",           \
 148         "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",         \
 149         "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",         \
 150         "f32", "f34", "f36", "f38", "f40", "f42", "f44", "f46",         \
 151         "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62",         \
 152         "cc", "memory"
 153
 154 #include <sysdeps/unix/sysv/linux/sparc/sysdep.h>
 155
 156 #endif  /* __ASSEMBLER__ */
 157
 158 /* This is the offset from the %sp to the backing store above the
 159    register windows.  So if you poke stack memory directly you add this.  */
 160 #define STACK_BIAS      2047
 161
 162 /* Pointer mangling support.  */
 163 #if defined NOT_IN_libc && defined IS_IN_rtld
 164 /* We cannot use the thread descriptor because in ld.so we use setjmp
 165    earlier than the descriptor is initialized.  */
 166 #else
 167 # ifdef __ASSEMBLER__
 168 #  define PTR_MANGLE(dreg, reg, tmpreg) \
 169   ldx   [%g7 + POINTER_GUARD], tmpreg; \
 170   xor   reg, tmpreg, dreg
 171 #  define PTR_DEMANGLE(dreg, reg, tmpreg) PTR_MANGLE (dreg, reg, tmpreg)
 172 #  define PTR_MANGLE2(dreg, reg, tmpreg) \
 173   xor   reg, tmpreg, dreg
 174 #  define PTR_DEMANGLE2(dreg, reg, tmpreg) PTR_MANGLE2 (dreg, reg, tmpreg)
 175 # else
 176 #  define PTR_MANGLE(var) \
 177   (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
 178 #  define PTR_DEMANGLE(var)     PTR_MANGLE (var)
 179 # endif
 180 #endif
 181
 182 #endif /* linux/sparc64/sysdep.h */