| 1 | /*
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| 2 | * Save/restore host registers.
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| 3 | *
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| 4 | * Copyright (c) 2007 CodeSourcery
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| 5 | *
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| 6 | * This library is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the GNU Lesser General Public
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| 8 | * License as published by the Free Software Foundation; either
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| 9 | * version 2 of the License, or (at your option) any later version.
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| 10 | *
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| 11 | * This library is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 14 | * Lesser General Public License for more details.
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| 15 | *
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| 16 | * You should have received a copy of the GNU Lesser General Public
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| 17 | * License along with this library; if not, write to the Free Software
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| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 19 | */
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| 20 |
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| 21 | /*
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| 22 | * Oracle LGPL Disclaimer: For the avoidance of doubt, except that if any license choice
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| 23 | * other than GPL or LGPL is available it will apply instead, Oracle elects to use only
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| 24 | * the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where
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| 25 | * a choice of LGPL license versions is made available with the language indicating
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| 26 | * that LGPLv2 or any later version may be used, or where a choice of which version
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| 27 | * of the LGPL is applied is otherwise unspecified.
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| 28 | */
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| 29 |
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| 30 | /* The GCC global register variable extension is used to reserve some
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| 31 | host registers for use by dyngen. However only the core parts of the
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| 32 | translation engine are compiled with these settings. We must manually
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| 33 | save/restore these registers when called from regular code.
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| 34 | It is not sufficient to save/restore T0 et. al. as these may be declared
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| 35 | with a datatype smaller than the actual register. */
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| 36 |
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| 37 | #if defined(DECLARE_HOST_REGS)
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| 38 |
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| 39 | #ifndef VBOX
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| 40 | #define DO_REG(REG) \
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| 41 | register host_reg_t reg_AREG##REG asm(AREG##REG); \
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| 42 | volatile host_reg_t saved_AREG##REG;
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| 43 | #else
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| 44 | #define DO_REG(REG) \
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| 45 | REGISTER_BOUND_GLOBAL(host_reg_t, reg_AREG##REG, AREG##REG); \
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| 46 | volatile host_reg_t saved_AREG##REG;
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| 47 | #endif
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| 48 |
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| 49 | #elif defined(SAVE_HOST_REGS)
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| 50 |
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| 51 | #ifndef VBOX
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| 52 | #define DO_REG(REG) \
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| 53 | __asm__ __volatile__ ("" : "=r" (reg_AREG##REG)); \
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| 54 | saved_AREG##REG = reg_AREG##REG;
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| 55 | #else /* VBOX */
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| 56 | #define DO_REG(REG) \
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| 57 | SAVE_GLOBAL_REGISTER(REG, reg_AREG##REG); \
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| 58 | saved_AREG##REG = reg_AREG##REG;
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| 59 | #endif /* VBOX */
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| 60 |
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| 61 | #else
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| 62 |
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| 63 | #ifndef VBOX
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| 64 | #define DO_REG(REG) \
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| 65 | reg_AREG##REG = saved_AREG##REG; \
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| 66 | __asm__ __volatile__ ("" : : "r" (reg_AREG##REG));
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| 67 | #else /* VBOX */
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| 68 | #define DO_REG(REG) \
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| 69 | reg_AREG##REG = saved_AREG##REG; \
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| 70 | RESTORE_GLOBAL_REGISTER(REG, reg_AREG##REG);
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| 71 | #endif
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| 72 |
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| 73 | #endif
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| 74 |
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| 75 | #ifdef AREG0
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| 76 | DO_REG(0)
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| 77 | #endif
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| 78 |
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| 79 | #ifdef AREG1
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| 80 | DO_REG(1)
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| 81 | #endif
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| 82 |
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| 83 | #ifdef AREG2
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| 84 | DO_REG(2)
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| 85 | #endif
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| 86 |
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| 87 | #ifdef AREG3
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| 88 | DO_REG(3)
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| 89 | #endif
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| 90 |
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| 91 | #ifdef AREG4
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| 92 | DO_REG(4)
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| 93 | #endif
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| 94 |
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| 95 | #ifdef AREG5
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| 96 | DO_REG(5)
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| 97 | #endif
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| 98 |
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| 99 | #ifdef AREG6
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| 100 | DO_REG(6)
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| 101 | #endif
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| 102 |
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| 103 | #ifdef AREG7
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| 104 | DO_REG(7)
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| 105 | #endif
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| 106 |
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| 107 | #ifdef AREG8
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| 108 | DO_REG(8)
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| 109 | #endif
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| 110 |
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| 111 | #ifdef AREG9
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| 112 | DO_REG(9)
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| 113 | #endif
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| 114 |
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| 115 | #ifdef AREG10
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| 116 | DO_REG(10)
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| 117 | #endif
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| 118 |
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| 119 | #ifdef AREG11
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| 120 | DO_REG(11)
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| 121 | #endif
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| 122 |
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| 123 | #undef SAVE_HOST_REGS
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| 124 | #undef DECLARE_HOST_REGS
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| 125 | #undef DO_REG
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