Update copyright dates with scripts/update-copyrights.

[thirdparty/glibc.git] / sysdeps / sparc / sysdep.h

diff --git a/sysdeps/sparc/sysdep.h b/sysdeps/sparc/sysdep.h
index bba41416d804191b88c93e7a181e7d408e019c6d..8c7e4e0ccac3c2db18094a6a94024b1424f33a00 100644 (file)
--- a/sysdeps/sparc/sysdep.h
+++ b/sysdeps/sparc/sysdep.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011 Free Software Foundation, Inc.
+/* Copyright (C) 2011-2016 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -12,34 +12,71 @@
    Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-/* Bits present in AT_HWCAP on SPARC.  */
-
-#define HWCAP_SPARC_FLUSH      0x00000001
-#define HWCAP_SPARC_STBAR      0x00000002
-#define HWCAP_SPARC_SWAP       0x00000004
-#define HWCAP_SPARC_MULDIV     0x00000008
-#define HWCAP_SPARC_V9         0x00000010
-#define HWCAP_SPARC_ULTRA3     0x00000020
-#define HWCAP_SPARC_BLKINIT    0x00000040
-#define HWCAP_SPARC_N2         0x00000080
-#define HWCAP_SPARC_MUL32      0x00000100
-#define HWCAP_SPARC_DIV32      0x00000200
-#define HWCAP_SPARC_FSMULD     0x00000400
-#define HWCAP_SPARC_V8PLUS     0x00000800
-#define HWCAP_SPARC_POPC       0x00001000
-#define HWCAP_SPARC_VIS                0x00002000
-#define HWCAP_SPARC_VIS2       0x00004000
-#define HWCAP_SPARC_ASI_BLK_INIT 0x00008000
-#define HWCAP_SPARC_FMAF       0x00010000
-#define HWCAP_SPARC_VIS3       0x00020000
-#define HWCAP_SPARC_HPC                0x00040000
-#define HWCAP_SPARC_RANDOM     0x00080000
-#define HWCAP_SPARC_TRANS      0x00100000
-#define HWCAP_SPARC_FJFMAU     0x00200000
-#define HWCAP_SPARC_IMA                0x00400000
-#define HWCAP_SPARC_ASI_CACHE_SPARING \
-                               0x00800000
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#define _SYSDEPS_SYSDEP_H 1
+#include <bits/hwcap.h>
+
+#ifdef __ASSEMBLER__
+
+#define SPARC_PIC_THUNK(reg)                                           \
+       .ifndef __sparc_get_pc_thunk.reg;                               \
+       .section .text.__sparc_get_pc_thunk.reg,"axG",@progbits,__sparc_get_pc_thunk.reg,comdat; \
+       .align   32;                                                    \
+       .weak    __sparc_get_pc_thunk.reg;                              \
+       .hidden  __sparc_get_pc_thunk.reg;                              \
+       .type    __sparc_get_pc_thunk.reg, #function;                   \
+__sparc_get_pc_thunk.reg:                                              \
+       jmp     %o7 + 8;                                                \
+        add    %o7, %reg, %##reg;                                      \
+       .previous;                                                      \
+       .endif;
+
+/* The "-4" and "+4" offsets against _GLOBAL_OFFSET_TABLE_ are
+   critical since they represent the offset from the thunk call to the
+   instruction containing the _GLOBAL_OFFSET_TABLE_ reference.
+   Therefore these instructions cannot be moved around without
+   appropriate adjustments to those offsets.
+
+   Furthermore, these expressions are special in another regard.  When
+   the assembler sees a reference to _GLOBAL_OFFSET_TABLE_ inside of
+   a %hi() or %lo(), it emits a PC-relative relocation.  This causes
+   R_SPARC_HI22 to turn into R_SPARC_PC22, and R_SPARC_LO10 to turn into
+   R_SPARC_PC10, respectively.
+
+   Even when v9 we use a call sequence instead of using "rd %pc" because
+   RDPC is extremely expensive and incurs a full pipeline flush.  */
+
+#define SPARC_PIC_THUNK_CALL(reg)                                      \
+       sethi   %hi(_GLOBAL_OFFSET_TABLE_-4), %##reg;                   \
+       call    __sparc_get_pc_thunk.reg;                               \
+        or     %##reg, %lo(_GLOBAL_OFFSET_TABLE_+4), %##reg;
+
+#define SETUP_PIC_REG(reg)                                             \
+       SPARC_PIC_THUNK(reg)                                            \
+       SPARC_PIC_THUNK_CALL(reg)
+
+#define SETUP_PIC_REG_LEAF(reg, tmp)                                   \
+       SPARC_PIC_THUNK(reg)                                            \
+       mov     %o7, %##tmp;                                            \
+       SPARC_PIC_THUNK_CALL(reg);                                      \
+       mov     %##tmp, %o7;
+
+#undef ENTRY
+#define ENTRY(name)                    \
+       .align  4;                      \
+       .global C_SYMBOL_NAME(name);    \
+       .type   name, @function;        \
+C_LABEL(name)                          \
+       cfi_startproc;
+
+#undef END
+#define END(name)                      \
+       cfi_endproc;                    \
+       .size name, . - name
+
+#undef LOC
+#define LOC(name)  .L##name
+
+#endif /* __ASSEMBLER__ */