dyngen-exec.h

   1 /*
   2  *  dyngen defines for micro operation code
   3  *
   4  *  Copyright (c) 2003 Fabrice Bellard
   5  *
   6  * This 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 of the License, or (at your option) any later version.
  10  *
  11  * This 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 this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #if !defined(__DYNGEN_EXEC_H__)
  20 #define __DYNGEN_EXEC_H__
  21
  22 #if defined(__i386__)
  23 #define AREG0 "ebp"
  24 #elif defined(__x86_64__)
  25 #define AREG0 "r14"
  26 #elif defined(_ARCH_PPC)
  27 #define AREG0 "r27"
  28 #elif defined(__arm__)
  29 #define AREG0 "r7"
  30 #elif defined(__hppa__)
  31 #define AREG0 "r17"
  32 #elif defined(__mips__)
  33 #define AREG0 "s0"
  34 #elif defined(__sparc__)
  35 #ifdef CONFIG_SOLARIS
  36 #define AREG0 "g2"
  37 #else
  38 #ifdef __sparc_v9__
  39 #define AREG0 "g5"
  40 #else
  41 #define AREG0 "g6"
  42 #endif
  43 #endif
  44 #elif defined(__s390__)
  45 #define AREG0 "r10"
  46 #elif defined(__alpha__)
  47 /* Note $15 is the frame pointer, so anything in op-i386.c that would
  48    require a frame pointer, like alloca, would probably loose.  */
  49 #define AREG0 "$15"
  50 #elif defined(__mc68000)
  51 #define AREG0 "%a5"
  52 #elif defined(__ia64__)
  53 #define AREG0 "r7"
  54 #else
  55 #error unsupported CPU
  56 #endif
  57
  58 register CPUState *env asm(AREG0);
  59
  60 /* The return address may point to the start of the next instruction.
  61    Subtracting one gets us the call instruction itself.  */
  62 #if defined(__s390__) && !defined(__s390x__)
  63 # define GETPC() ((void*)(((unsigned long)__builtin_return_address(0) & 0x7fffffffUL) - 1))
  64 #elif defined(__arm__)
  65 /* Thumb return addresses have the low bit set, so we need to subtract two.
  66    This is still safe in ARM mode because instructions are 4 bytes.  */
  67 # define GETPC() ((void *)((unsigned long)__builtin_return_address(0) - 2))
  68 #else
  69 # define GETPC() ((void *)((unsigned long)__builtin_return_address(0) - 1))
  70 #endif
  71
  72 #endif /* !defined(__DYNGEN_EXEC_H__) */