Revision 24ebf5f3
| b/cpu-exec.c | ||
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int cpu_exec(CPUState *env1) |
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{
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#define DECLARE_HOST_REGS 1 |
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#include "hostregs_helper.h" |
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host_reg_t saved_env_reg; |
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int ret, interrupt_request; |
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TranslationBlock *tb; |
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uint8_t *tc_ptr; |
| ... | ... | |
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cpu_single_env = env1; |
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/* first we save global registers */ |
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#define SAVE_HOST_REGS 1 |
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#include "hostregs_helper.h" |
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/* the access to env below is actually saving the global register's |
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value, so that files not including target-xyz/exec.h are free to |
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use it. */ |
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QEMU_BUILD_BUG_ON (sizeof (saved_env_reg) != sizeof (env)); |
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saved_env_reg = (host_reg_t) env; |
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asm("");
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env = env1; |
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#if defined(TARGET_I386) |
| ... | ... | |
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#endif |
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/* restore global registers */ |
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#include "hostregs_helper.h" |
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asm("");
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env = (void *) saved_env_reg; |
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/* fail safe : never use cpu_single_env outside cpu_exec() */ |
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cpu_single_env = NULL; |
| /dev/null | ||
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/* |
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* Save/restore host registers. |
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* |
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* Copyright (c) 2007 CodeSourcery |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, see <http://www.gnu.org/licenses/>. |
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*/ |
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|
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/* The GCC global register variable extension is used to reserve some |
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host registers for use by generated code. However only the core parts of |
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the translation engine are compiled with these settings. We must manually |
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save/restore these registers when called from regular code. |
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It is not sufficient to save/restore T0 et. al. as these may be declared |
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with a datatype smaller than the actual register. */ |
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#if defined(DECLARE_HOST_REGS) |
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#define DO_REG(REG) \ |
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register host_reg_t reg_AREG##REG asm(AREG##REG); \ |
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volatile host_reg_t saved_AREG##REG; |
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#elif defined(SAVE_HOST_REGS) |
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#define DO_REG(REG) \ |
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__asm__ __volatile__ ("" : "=r" (reg_AREG##REG)); \
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saved_AREG##REG = reg_AREG##REG; |
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#else |
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#define DO_REG(REG) \ |
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reg_AREG##REG = saved_AREG##REG; \ |
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__asm__ __volatile__ ("" : : "r" (reg_AREG##REG));
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#endif |
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#ifdef AREG0 |
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DO_REG(0) |
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#endif |
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#ifdef AREG1 |
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DO_REG(1) |
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#endif |
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#ifdef AREG2 |
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DO_REG(2) |
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#endif |
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#undef SAVE_HOST_REGS |
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#undef DECLARE_HOST_REGS |
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#undef DO_REG |
|
| b/qemu-common.h | ||
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#define QEMU_WARN_UNUSED_RESULT |
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#endif |
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#define QEMU_BUILD_BUG_ON(x) typedef char __build_bug_on__##__LINE__[(x)?-1:1]; |
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|
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/* Hack around the mess dyngen-exec.h causes: We need QEMU_NORETURN in files that |
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cannot include the following headers without conflicts. This condition has |
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to be removed once dyngen is gone. */ |
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