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

   1 /* Copyright (C) 1997, 2000, 2002, 2003, 2004, 2006
   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 ENTRY
  53
  54 #define ENTRY(name)                                                     \
  55         .global C_SYMBOL_NAME(name);                                    \
  56         .align 2;                                                       \
  57         C_LABEL(name);                                                  \
  58         .type name,@function;
  59
  60 #ifdef LINKER_HANDLES_R_SPARC_WDISP22
  61 /* Unfortunately, we cannot do this yet.  Linker doesn't seem to
  62    handle R_SPARC_WDISP22 against non-STB_LOCAL symbols properly .  */
  63 # define SYSCALL_ERROR_HANDLER_ENTRY(handler)                           \
  64         .section .gnu.linkonce.t.handler,"ax",@progbits;                \
  65         .globl handler;                                                 \
  66         .hidden handler;                                                \
  67         .type handler,@function;                                        \
  68 handler:
  69 #else
  70 # define SYSCALL_ERROR_HANDLER_ENTRY(handler)                           \
  71         .subsection 3;                                                  \
  72 handler:
  73 #endif
  74
  75 #if RTLD_PRIVATE_ERRNO
  76 # define SYSCALL_ERROR_HANDLER                                          \
  77         .section .gnu.linkonce.t.__sparc64.get_pic.l7,"ax",@progbits;   \
  78         .globl __sparc64.get_pic.l7;                                    \
  79         .hidden __sparc64.get_pic.l7;                                   \
  80         .type __sparc64.get_pic.l7,@function;                           \
  81 __sparc64.get_pic.l7:                                                   \
  82         retl;                                                           \
  83          add    %o7, %l7, %l7;                                          \
  84         .previous;                                                      \
  85 SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler)                    \
  86         save    %sp, -192, %sp;                                         \
  87         sethi   %hi(_GLOBAL_OFFSET_TABLE_-4), %l7;                      \
  88         call    __sparc64.get_pic.l7;                                   \
  89          add    %l7, %lo(_GLOBAL_OFFSET_TABLE_+4), %l7;                 \
  90         sethi   %hi(rtld_errno), %g1;                                   \
  91         or      %g1, %lo(rtld_errno), %g1;                              \
  92         ldx     [%l7 + %g1], %l0;                                       \
  93         st      %i0, [%l0];                                             \
  94         jmpl    %i7+8, %g0;                                             \
  95          restore %g0, -1, %o0;                                          \
  96         .previous;
  97 #elif USE___THREAD
  98 # ifndef NOT_IN_libc
  99 #  define SYSCALL_ERROR_ERRNO __libc_errno
 100 # else
 101 #  define SYSCALL_ERROR_ERRNO errno
 102 # endif
 103 # ifdef SHARED
 104 #  define SYSCALL_ERROR_HANDLER                                         \
 105         .section .gnu.linkonce.t.__sparc64.get_pic.l7,"ax",@progbits;   \
 106         .globl __sparc64.get_pic.l7;                                    \
 107         .hidden __sparc64.get_pic.l7;                                   \
 108         .type __sparc64.get_pic.l7,@function;                           \
 109 __sparc64.get_pic.l7:                                                   \
 110         retl;                                                           \
 111          add    %o7, %l7, %l7;                                          \
 112         .previous;                                                      \
 113 SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler)                    \
 114         save    %sp,-192,%sp;                                           \
 115         sethi   %tie_hi22(SYSCALL_ERROR_ERRNO), %l1;                    \
 116         sethi   %hi(_GLOBAL_OFFSET_TABLE_-4), %l7;                      \
 117         call    __sparc64.get_pic.l7;                                   \
 118          add    %l7, %lo(_GLOBAL_OFFSET_TABLE_+4), %l7;                 \
 119         add     %l1, %tie_lo10(SYSCALL_ERROR_ERRNO), %l1;               \
 120         ldx     [%l7 + %l1], %l1, %tie_ldx(SYSCALL_ERROR_ERRNO);        \
 121         st      %i0, [%g7 + %l1], %tie_add(SYSCALL_ERROR_ERRNO);        \
 122         jmpl    %i7+8, %g0;                                             \
 123          restore %g0, -1, %o0;                                          \
 124         .previous;
 125 # else
 126 #  define SYSCALL_ERROR_HANDLER                                         \
 127 SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler)                    \
 128         sethi   %tie_hi22(SYSCALL_ERROR_ERRNO), %g1;                    \
 129         sethi   %hi(_GLOBAL_OFFSET_TABLE_), %g4;                        \
 130         add     %g1, %tie_lo10(SYSCALL_ERROR_ERRNO), %g1;               \
 131         add     %g4, %lo(_GLOBAL_OFFSET_TABLE_), %g4;                   \
 132         ldx     [%g4 + %g1], %g1, %tie_ldx(SYSCALL_ERROR_ERRNO);        \
 133         st      %o0, [%g7 + %g1], %tie_add(SYSCALL_ERROR_ERRNO);        \
 134         jmpl    %o7+8, %g0;                                             \
 135          mov    -1, %o0;                                                \
 136         .previous;
 137 # endif
 138 #else
 139 # define SYSCALL_ERROR_HANDLER                                          \
 140 SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler)                    \
 141         .global __errno_location;                                       \
 142         .type   __errno_location,@function;                             \
 143         save    %sp, -192, %sp;                                         \
 144         call    __errno_location;                                       \
 145          nop;                                                           \
 146         st      %i0, [%o0];                                             \
 147         jmpl    %i7+8, %g0;                                             \
 148          restore %g0, -1, %o0;                                          \
 149         .previous;
 150 #endif
 151
 152 #define PSEUDO(name, syscall_name, args)                                \
 153         .text;                                                          \
 154         ENTRY(name);                                                    \
 155         LOADSYSCALL(syscall_name);                                      \
 156         ta      0x6d;                                                   \
 157         bcs,pn  %xcc, __syscall_error_handler;                          \
 158          nop;                                                           \
 159         SYSCALL_ERROR_HANDLER
 160
 161 #define PSEUDO_NOERRNO(name, syscall_name, args)                        \
 162         .text;                                                          \
 163         ENTRY(name);                                                    \
 164         LOADSYSCALL(syscall_name);                                      \
 165         ta      0x6d
 166
 167 #define PSEUDO_ERRVAL(name, syscall_name, args)                         \
 168         .text;                                                          \
 169         ENTRY(name);                                                    \
 170         LOADSYSCALL(syscall_name);                                      \
 171         ta      0x6d
 172
 173 #undef PSEUDO_END
 174 #define PSEUDO_END(name)                                                \
 175         .size name,.-name
 176
 177 #undef PSEUDO_END_NOERRNO
 178 #define PSEUDO_END_NOERRNO(name)                                        \
 179         .size name,.-name
 180
 181 #undef PSEUDO_END_ERRVAL
 182 #define PSEUDO_END_ERRVAL(name)                                         \
 183         .size name,.-name
 184
 185 #undef END
 186 #define END(name)                                                       \
 187         .size name,.-name
 188
 189 /* Careful here!  This "ret" define can interfere; use jmpl if unsure.  */
 190 #define ret             retl; nop
 191 #define ret_NOERRNO     retl; nop
 192 #define ret_ERRVAL      retl; nop
 193 #define r0              %o0
 194 #define r1              %o1
 195 #define MOVE(x,y)       mov x, y
 196
 197 #else  /* __ASSEMBLER__ */
 198
 199 #define __SYSCALL_STRING                                                \
 200         "ta     0x6d;"                                                  \
 201         "bcc,pt %%xcc, 1f;"                                             \
 202         " nop;"                                                         \
 203         "save   %%sp, -192, %%sp;"                                      \
 204         "call   __errno_location;"                                      \
 205         " nop;"                                                         \
 206         "st     %%i0,[%%o0];"                                           \
 207         "restore %%g0, -1, %%o0;"                                       \
 208         "1:"
 209
 210 #define __CLONE_SYSCALL_STRING                                          \
 211         "ta     0x6d;"                                                  \
 212         "bcc,pt %%xcc, 1f;"                                             \
 213         " sub   %%o1, 1, %%o1;"                                         \
 214         "save   %%sp, -192, %%sp;"                                      \
 215         "call   __errno_location;"                                      \
 216         " mov   -1, %%i1;"                                              \
 217         "st     %%i0,[%%o0];"                                           \
 218         "restore %%g0, -1, %%o0;"                                       \
 219         "1:"                                                            \
 220         "and    %%o0, %%o1, %%o0"
 221
 222 #define __INTERNAL_SYSCALL_STRING                                       \
 223         "ta     0x6d;"                                                  \
 224         "bcs,a,pt %%xcc, 1f;"                                           \
 225         " sub   %%g0, %%o0, %%o0;"                                      \
 226         "1:"
 227
 228 #define __SYSCALL_CLOBBERS "g2", "g3", "g4", "g5", "g6",                \
 229         "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",                 \
 230         "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",           \
 231         "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",         \
 232         "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",         \
 233         "f32", "f34", "f36", "f38", "f40", "f42", "f44", "f46",         \
 234         "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62",         \
 235         "cc", "memory"
 236
 237 #include <sysdeps/unix/sysv/linux/sparc/sysdep.h>
 238
 239 #endif  /* __ASSEMBLER__ */
 240
 241 /* This is the offset from the %sp to the backing store above the
 242    register windows.  So if you poke stack memory directly you add this.  */
 243 #define STACK_BIAS      2047
 244
 245 /* Pointer mangling support.  */
 246 #if defined NOT_IN_libc && defined IS_IN_rtld
 247 /* We cannot use the thread descriptor because in ld.so we use setjmp
 248    earlier than the descriptor is initialized.  */
 249 #else
 250 # ifdef __ASSEMBLER__
 251 #  define PTR_MANGLE(dreg, reg, tmpreg) \
 252   ldx   [%g7 + POINTER_GUARD], tmpreg; \
 253   xor   reg, tmpreg, dreg
 254 #  define PTR_DEMANGLE(dreg, reg, tmpreg) PTR_MANGLE (dreg, reg, tmpreg)
 255 #  define PTR_MANGLE2(dreg, reg, tmpreg) \
 256   xor   reg, tmpreg, dreg
 257 #  define PTR_DEMANGLE2(dreg, reg, tmpreg) PTR_MANGLE2 (dreg, reg, tmpreg)
 258 # else
 259 #  define PTR_MANGLE(var) \
 260   (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
 261 #  define PTR_DEMANGLE(var)     PTR_MANGLE (var)
 262 # endif
 263 #endif
 264
 265 #endif /* linux/sparc64/sysdep.h */