mirror of
https://github.com/qemu/qemu.git
synced 2024-11-24 11:23:43 +08:00
99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
|
/*
|
||
|
|
* Save/restore host registrs.
|
||
|
|
*
|
||
|
|
* Copyright (c) 2007 CodeSourcery
|
||
|
|
*
|
||
|
|
* This library is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU Lesser General Public
|
||
|
|
* License as published by the Free Software Foundation; either
|
||
|
|
* version 2 of the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This library is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
* Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public
|
||
|
|
* License along with this library; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* The GCC global register vairable extension is used to reserve some
|
||
|
|
host registers for use by dyngen. However only the core parts of the
|
||
|
|
translation engine are compiled with these settings. We must manually
|
||
|
|
save/restore these registers when called from regular code.
|
||
|
|
It is not sufficient to save/restore T0 et. al. as these may be declared
|
||
|
|
with a datatype smaller than the actual register. */
|
||
|
|
|
||
|
|
#if defined(DECLARE_HOST_REGS)
|
||
|
|
|
||
|
|
#define DO_REG(REG) \
|
||
|
|
register host_reg_t reg_AREG##REG asm(AREG##REG); \
|
||
|
|
volatile host_reg_t saved_AREG##REG;
|
||
|
|
|
||
|
|
#elif defined(SAVE_HOST_REGS)
|
||
|
|
|
||
|
|
#define DO_REG(REG) \
|
||
|
|
__asm__ __volatile__ ("" : "=r" (reg_AREG##REG)); \
|
||
|
|
saved_AREG##REG = reg_AREG##REG;
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#define DO_REG(REG) \
|
||
|
|
reg_AREG##REG = saved_AREG##REG; \
|
||
|
|
__asm__ __volatile__ ("" : : "r" (reg_AREG##REG));
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef AREG0
|
||
|
|
DO_REG(0)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef AREG1
|
||
|
|
DO_REG(1)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef AREG2
|
||
|
|
DO_REG(2)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef AREG3
|
||
|
|
DO_REG(3)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef AREG4
|
||
|
|
DO_REG(4)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef AREG5
|
||
|
|
DO_REG(5)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef AREG6
|
||
|
|
DO_REG(6)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef AREG7
|
||
|
|
DO_REG(7)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef AREG8
|
||
|
|
DO_REG(8)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef AREG9
|
||
|
|
DO_REG(9)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef AREG10
|
||
|
|
DO_REG(10)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef AREG11
|
||
|
|
DO_REG(11)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#undef SAVE_HOST_REGS
|
||
|
|
#undef DECLARE_HOST_REGS
|
||
|
|
#undef DO_REG
|