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

   1 /* Copyright (C) 1997, 2002, 2003, 2004 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 ENTRY
  42 #undef END
  43 #undef LOC
  44
  45 #define ENTRY(name) \
  46         .global C_SYMBOL_NAME(name); \
  47         .align 4;\
  48         C_LABEL(name);\
  49         .type name,@function;
  50
  51 #define END(name) \
  52         .size name, . - name
  53
  54 #define LOC(name)  .L##name
  55
  56 #ifdef LINKER_HANDLES_R_SPARC_WDISP22
  57 /* Unfortunately, we cannot do this yet.  Linker doesn't seem to
  58    handle R_SPARC_WDISP22 against non-STB_LOCAL symbols properly .  */
  59 # define SYSCALL_ERROR_HANDLER_ENTRY(handler)                           \
  60         .section .gnu.linkonce.t.handler,"ax",@progbits;                \
  61         .globl handler;                                                 \
  62         .hidden handler;                                                \
  63         .type handler,@function;                                        \
  64 handler:
  65 #else
  66 # define SYSCALL_ERROR_HANDLER_ENTRY(handler)                           \
  67         .subsection 3;                                                  \
  68 handler:
  69 #endif
  70
  71 #if RTLD_PRIVATE_ERRNO
  72 # define SYSCALL_ERROR_HANDLER                                          \
  73         .section .gnu.linkonce.t.__sparc_get_pic_l7,"ax",@progbits;     \
  74         .globl __sparc_get_pic_l7;                                      \
  75         .hidden __sparc_get_pic_l7;                                     \
  76         .type __sparc_get_pic_l7,@function;                             \
  77 __sparc_get_pic_l7:                                                     \
  78         retl;                                                           \
  79          add    %o7, %l7, %l7;                                          \
  80         .previous;                                                      \
  81 SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler)                    \
  82         save    %sp,-96,%sp;                                            \
  83         sethi   %hi(_GLOBAL_OFFSET_TABLE_-4), %l7;                      \
  84         call    __sparc_get_pic_l7;                                     \
  85          add    %l7, %lo(_GLOBAL_OFFSET_TABLE_+4), %l7;                 \
  86         ld      [%l7 + rtld_errno], %l0;                                \
  87         st      %i0, [%l0];                                             \
  88         jmpl    %i7+8, %g0;                                             \
  89          restore %g0, -1, %o0;                                          \
  90         .previous;
  91 #elif USE___THREAD
  92 # ifndef NOT_IN_libc
  93 #  define SYSCALL_ERROR_ERRNO __libc_errno
  94 # else
  95 #  define SYSCALL_ERROR_ERRNO errno
  96 # endif
  97 # ifdef SHARED
  98 #  define SYSCALL_ERROR_HANDLER                                         \
  99         .section .gnu.linkonce.t.__sparc_get_pic_l7,"ax",@progbits;     \
 100         .globl __sparc_get_pic_l7;                                      \
 101         .hidden __sparc_get_pic_l7;                                     \
 102         .type __sparc_get_pic_l7,@function;                             \
 103 __sparc_get_pic_l7:                                                     \
 104         retl;                                                           \
 105          add    %o7, %l7, %l7;                                          \
 106         .previous;                                                      \
 107 SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler)                    \
 108         save    %sp,-96,%sp;                                            \
 109         sethi   %tie_hi22(SYSCALL_ERROR_ERRNO), %l1;                    \
 110         sethi   %hi(_GLOBAL_OFFSET_TABLE_-4), %l7;                      \
 111         call    __sparc_get_pic_l7;                                     \
 112          add    %l7, %lo(_GLOBAL_OFFSET_TABLE_+4), %l7;                 \
 113         add     %l1, %tie_lo10(SYSCALL_ERROR_ERRNO), %l1;               \
 114         ld      [%l7 + %l1], %l1, %tie_ld(SYSCALL_ERROR_ERRNO);         \
 115         st      %i0, [%g7 + %l1], %tie_add(SYSCALL_ERROR_ERRNO);        \
 116         jmpl    %i7+8, %g0;                                             \
 117          restore %g0, -1, %o0;                                          \
 118         .previous;
 119 # else
 120 #  define SYSCALL_ERROR_HANDLER                                         \
 121 SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler)                    \
 122         sethi   %tie_hi22(SYSCALL_ERROR_ERRNO), %g1;                    \
 123         sethi   %hi(_GLOBAL_OFFSET_TABLE_), %g2;                        \
 124         add     %g1, %tie_lo10(SYSCALL_ERROR_ERRNO), %g1;               \
 125         add     %g2, %lo(_GLOBAL_OFFSET_TABLE_), %g2;                   \
 126         ld      [%g2 + %g1], %g1, %tie_ld(SYSCALL_ERROR_ERRNO);         \
 127         st      %o0, [%g7 + %g1], %tie_add(SYSCALL_ERROR_ERRNO);        \
 128         jmpl    %o7+8, %g0;                                             \
 129          mov    -1, %o0;                                                \
 130         .previous;
 131 # endif
 132 #else
 133 # define SYSCALL_ERROR_HANDLER                                          \
 134 SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler)                    \
 135         .global __errno_location;                                       \
 136         .type   __errno_location,@function;                             \
 137         save   %sp, -96, %sp;                                           \
 138         call   __errno_location;                                        \
 139          nop;                                                           \
 140         st      %i0, [%o0];                                             \
 141         jmpl    %i7+8, %g0;                                             \
 142          restore %g0, -1, %o0;                                          \
 143         .previous;
 144 #endif
 145
 146 #define PSEUDO(name, syscall_name, args)                        \
 147         .text;                                                  \
 148         ENTRY(name);                                            \
 149         LOADSYSCALL(syscall_name);                              \
 150         ta 0x10;                                                \
 151         bcs __syscall_error_handler;                            \
 152          nop;                                                   \
 153         SYSCALL_ERROR_HANDLER
 154
 155 #define PSEUDO_NOERRNO(name, syscall_name, args)                \
 156         .text;                                                  \
 157         ENTRY(name);                                            \
 158         LOADSYSCALL(syscall_name);                              \
 159         ta 0x10
 160
 161 #define PSEUDO_ERRVAL(name, syscall_name, args)                 \
 162         .text;                                                  \
 163         ENTRY(name);                                            \
 164         LOADSYSCALL(syscall_name);                              \
 165         ta 0x10
 166
 167 #else  /* __ASSEMBLER__ */
 168
 169 #define __SYSCALL_STRING                                                \
 170         "ta     0x10;"                                                  \
 171         "bcs    2f;"                                                    \
 172         " nop;"                                                         \
 173         "1:"                                                            \
 174         ".subsection 2;"                                                \
 175         "2:"                                                            \
 176         "save   %%sp, -192, %%sp;"                                      \
 177         "call   __errno_location;"                                      \
 178         " nop;"                                                         \
 179         "st     %%i0,[%%o0];"                                           \
 180         "ba     1b;"                                                    \
 181         " restore %%g0, -1, %%o0;"                                      \
 182         ".previous;"
 183
 184 #define __CLONE_SYSCALL_STRING                                          \
 185         "ta     0x10;"                                                  \
 186         "bcs    2f;"                                                    \
 187         " sub   %%o1, 1, %%o1;"                                         \
 188         "and    %%o0, %%o1, %%o0;"                                      \
 189         "1:"                                                            \
 190         ".subsection 2;"                                                \
 191         "2:"                                                            \
 192         "save   %%sp, -192, %%sp;"                                      \
 193         "call   __errno_location;"                                      \
 194         " nop;"                                                         \
 195         "st     %%i0, [%%o0];"                                          \
 196         "ba     1b;"                                                    \
 197         " restore %%g0, -1, %%o0;"                                      \
 198         ".previous;"
 199
 200 #define __INTERNAL_SYSCALL_STRING                                       \
 201         "ta     0x10;"                                                  \
 202         "bcs,a  1f;"                                                    \
 203         " sub   %%g0, %%o0, %%o0;"                                      \
 204         "1:"
 205
 206 #define __SYSCALL_CLOBBERS "g2", "g3", "g4", "g5", "g6",                \
 207         "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",                 \
 208         "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",           \
 209         "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",         \
 210         "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",         \
 211         "cc", "memory"
 212
 213 #include <sysdeps/unix/sysv/linux/sparc/sysdep.h>
 214
 215 #endif  /* __ASSEMBLER__ */
 216
 217 #endif /* linux/sparc/sysdep.h */