Browse Source
Over the years, most parts of exec.c that were not specific to softmmu have been moved to accel/tcg; what's left is mostly the low-level part of the memory API, which includes RAMBlock and AddressSpaceDispatch. However exec.c also hosts 4-500 lines of code for the target specific parts of the CPU QOM object, plus a few functions for user-mode emulation that do not have a better place (they are not TCG-specific so accel/tcg/user-exec.c is not a good place either). Move these parts to a new file, so that exec.c can be moved to softmmu/physmem.c. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>remotes/github/staging
Paolo Bonzini
6 years ago
6 changed files with 467 additions and 451 deletions
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/*
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* Target-specific parts of the CPU object |
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* |
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* Copyright (c) 2003 Fabrice Bellard |
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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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#include "qemu/osdep.h" |
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#include "qemu-common.h" |
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#include "qapi/error.h" |
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#include "exec/target_page.h" |
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#include "hw/qdev-core.h" |
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#include "hw/qdev-properties.h" |
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#include "qemu/error-report.h" |
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#include "migration/vmstate.h" |
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#ifdef CONFIG_USER_ONLY |
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#include "qemu.h" |
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#else |
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#include "exec/address-spaces.h" |
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#endif |
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#include "sysemu/tcg.h" |
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#include "sysemu/kvm.h" |
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#include "sysemu/replay.h" |
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#include "translate-all.h" |
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#include "exec/log.h" |
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uintptr_t qemu_host_page_size; |
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intptr_t qemu_host_page_mask; |
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#ifndef CONFIG_USER_ONLY |
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static int cpu_common_post_load(void *opaque, int version_id) |
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{ |
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CPUState *cpu = opaque; |
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/* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the
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version_id is increased. */ |
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cpu->interrupt_request &= ~0x01; |
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tlb_flush(cpu); |
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/* loadvm has just updated the content of RAM, bypassing the
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* usual mechanisms that ensure we flush TBs for writes to |
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* memory we've translated code from. So we must flush all TBs, |
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* which will now be stale. |
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*/ |
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tb_flush(cpu); |
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return 0; |
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} |
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static int cpu_common_pre_load(void *opaque) |
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{ |
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CPUState *cpu = opaque; |
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cpu->exception_index = -1; |
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return 0; |
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} |
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static bool cpu_common_exception_index_needed(void *opaque) |
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{ |
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CPUState *cpu = opaque; |
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return tcg_enabled() && cpu->exception_index != -1; |
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} |
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static const VMStateDescription vmstate_cpu_common_exception_index = { |
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.name = "cpu_common/exception_index", |
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.version_id = 1, |
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.minimum_version_id = 1, |
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.needed = cpu_common_exception_index_needed, |
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.fields = (VMStateField[]) { |
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VMSTATE_INT32(exception_index, CPUState), |
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VMSTATE_END_OF_LIST() |
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} |
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}; |
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static bool cpu_common_crash_occurred_needed(void *opaque) |
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{ |
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CPUState *cpu = opaque; |
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return cpu->crash_occurred; |
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} |
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static const VMStateDescription vmstate_cpu_common_crash_occurred = { |
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.name = "cpu_common/crash_occurred", |
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.version_id = 1, |
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.minimum_version_id = 1, |
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.needed = cpu_common_crash_occurred_needed, |
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.fields = (VMStateField[]) { |
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VMSTATE_BOOL(crash_occurred, CPUState), |
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VMSTATE_END_OF_LIST() |
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} |
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}; |
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const VMStateDescription vmstate_cpu_common = { |
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.name = "cpu_common", |
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.version_id = 1, |
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.minimum_version_id = 1, |
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.pre_load = cpu_common_pre_load, |
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.post_load = cpu_common_post_load, |
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.fields = (VMStateField[]) { |
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VMSTATE_UINT32(halted, CPUState), |
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VMSTATE_UINT32(interrupt_request, CPUState), |
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VMSTATE_END_OF_LIST() |
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}, |
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.subsections = (const VMStateDescription*[]) { |
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&vmstate_cpu_common_exception_index, |
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&vmstate_cpu_common_crash_occurred, |
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NULL |
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} |
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}; |
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#endif |
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void cpu_exec_unrealizefn(CPUState *cpu) |
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{ |
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CPUClass *cc = CPU_GET_CLASS(cpu); |
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tlb_destroy(cpu); |
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cpu_list_remove(cpu); |
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#ifdef CONFIG_USER_ONLY |
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assert(cc->vmsd == NULL); |
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#else |
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if (cc->vmsd != NULL) { |
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vmstate_unregister(NULL, cc->vmsd, cpu); |
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} |
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if (qdev_get_vmsd(DEVICE(cpu)) == NULL) { |
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vmstate_unregister(NULL, &vmstate_cpu_common, cpu); |
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} |
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tcg_iommu_free_notifier_list(cpu); |
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#endif |
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} |
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Property cpu_common_props[] = { |
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#ifndef CONFIG_USER_ONLY |
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/* Create a memory property for softmmu CPU object,
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* so users can wire up its memory. (This can't go in hw/core/cpu.c |
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* because that file is compiled only once for both user-mode |
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* and system builds.) The default if no link is set up is to use |
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* the system address space. |
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*/ |
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DEFINE_PROP_LINK("memory", CPUState, memory, TYPE_MEMORY_REGION, |
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MemoryRegion *), |
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#endif |
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DEFINE_PROP_BOOL("start-powered-off", CPUState, start_powered_off, false), |
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DEFINE_PROP_END_OF_LIST(), |
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}; |
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void cpu_exec_initfn(CPUState *cpu) |
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{ |
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cpu->as = NULL; |
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cpu->num_ases = 0; |
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#ifndef CONFIG_USER_ONLY |
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cpu->thread_id = qemu_get_thread_id(); |
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cpu->memory = get_system_memory(); |
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object_ref(OBJECT(cpu->memory)); |
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#endif |
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} |
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void cpu_exec_realizefn(CPUState *cpu, Error **errp) |
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{ |
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CPUClass *cc = CPU_GET_CLASS(cpu); |
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static bool tcg_target_initialized; |
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cpu_list_add(cpu); |
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if (tcg_enabled() && !tcg_target_initialized) { |
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tcg_target_initialized = true; |
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cc->tcg_initialize(); |
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} |
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tlb_init(cpu); |
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qemu_plugin_vcpu_init_hook(cpu); |
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#ifdef CONFIG_USER_ONLY |
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assert(cc->vmsd == NULL); |
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#else /* !CONFIG_USER_ONLY */ |
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if (qdev_get_vmsd(DEVICE(cpu)) == NULL) { |
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vmstate_register(NULL, cpu->cpu_index, &vmstate_cpu_common, cpu); |
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} |
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if (cc->vmsd != NULL) { |
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vmstate_register(NULL, cpu->cpu_index, cc->vmsd, cpu); |
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} |
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tcg_iommu_init_notifier_list(cpu); |
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#endif |
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} |
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const char *parse_cpu_option(const char *cpu_option) |
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{ |
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ObjectClass *oc; |
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CPUClass *cc; |
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gchar **model_pieces; |
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const char *cpu_type; |
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model_pieces = g_strsplit(cpu_option, ",", 2); |
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if (!model_pieces[0]) { |
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error_report("-cpu option cannot be empty"); |
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exit(1); |
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} |
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oc = cpu_class_by_name(CPU_RESOLVING_TYPE, model_pieces[0]); |
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if (oc == NULL) { |
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error_report("unable to find CPU model '%s'", model_pieces[0]); |
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g_strfreev(model_pieces); |
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exit(EXIT_FAILURE); |
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} |
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cpu_type = object_class_get_name(oc); |
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cc = CPU_CLASS(oc); |
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cc->parse_features(cpu_type, model_pieces[1], &error_fatal); |
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g_strfreev(model_pieces); |
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return cpu_type; |
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} |
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#if defined(CONFIG_USER_ONLY) |
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void tb_invalidate_phys_addr(target_ulong addr) |
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{ |
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mmap_lock(); |
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tb_invalidate_phys_page_range(addr, addr + 1); |
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mmap_unlock(); |
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} |
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static void breakpoint_invalidate(CPUState *cpu, target_ulong pc) |
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{ |
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tb_invalidate_phys_addr(pc); |
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} |
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#else |
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void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr, MemTxAttrs attrs) |
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{ |
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ram_addr_t ram_addr; |
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MemoryRegion *mr; |
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hwaddr l = 1; |
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if (!tcg_enabled()) { |
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return; |
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} |
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RCU_READ_LOCK_GUARD(); |
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mr = address_space_translate(as, addr, &addr, &l, false, attrs); |
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if (!(memory_region_is_ram(mr) |
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|| memory_region_is_romd(mr))) { |
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return; |
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} |
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ram_addr = memory_region_get_ram_addr(mr) + addr; |
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tb_invalidate_phys_page_range(ram_addr, ram_addr + 1); |
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} |
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static void breakpoint_invalidate(CPUState *cpu, target_ulong pc) |
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{ |
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/*
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* There may not be a virtual to physical translation for the pc |
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* right now, but there may exist cached TB for this pc. |
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* Flush the whole TB cache to force re-translation of such TBs. |
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* This is heavyweight, but we're debugging anyway. |
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*/ |
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tb_flush(cpu); |
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} |
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#endif |
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/* Add a breakpoint. */ |
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int cpu_breakpoint_insert(CPUState *cpu, vaddr pc, int flags, |
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CPUBreakpoint **breakpoint) |
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{ |
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CPUBreakpoint *bp; |
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bp = g_malloc(sizeof(*bp)); |
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bp->pc = pc; |
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bp->flags = flags; |
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/* keep all GDB-injected breakpoints in front */ |
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if (flags & BP_GDB) { |
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QTAILQ_INSERT_HEAD(&cpu->breakpoints, bp, entry); |
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} else { |
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QTAILQ_INSERT_TAIL(&cpu->breakpoints, bp, entry); |
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} |
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breakpoint_invalidate(cpu, pc); |
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if (breakpoint) { |
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*breakpoint = bp; |
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} |
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return 0; |
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} |
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/* Remove a specific breakpoint. */ |
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int cpu_breakpoint_remove(CPUState *cpu, vaddr pc, int flags) |
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{ |
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CPUBreakpoint *bp; |
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QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) { |
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if (bp->pc == pc && bp->flags == flags) { |
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cpu_breakpoint_remove_by_ref(cpu, bp); |
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return 0; |
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} |
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} |
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return -ENOENT; |
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} |
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/* Remove a specific breakpoint by reference. */ |
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void cpu_breakpoint_remove_by_ref(CPUState *cpu, CPUBreakpoint *breakpoint) |
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{ |
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QTAILQ_REMOVE(&cpu->breakpoints, breakpoint, entry); |
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breakpoint_invalidate(cpu, breakpoint->pc); |
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g_free(breakpoint); |
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} |
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/* Remove all matching breakpoints. */ |
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void cpu_breakpoint_remove_all(CPUState *cpu, int mask) |
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{ |
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CPUBreakpoint *bp, *next; |
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QTAILQ_FOREACH_SAFE(bp, &cpu->breakpoints, entry, next) { |
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if (bp->flags & mask) { |
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cpu_breakpoint_remove_by_ref(cpu, bp); |
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} |
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} |
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} |
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/* enable or disable single step mode. EXCP_DEBUG is returned by the
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CPU loop after each instruction */ |
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void cpu_single_step(CPUState *cpu, int enabled) |
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{ |
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if (cpu->singlestep_enabled != enabled) { |
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cpu->singlestep_enabled = enabled; |
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if (kvm_enabled()) { |
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kvm_update_guest_debug(cpu, 0); |
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} else { |
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/* must flush all the translated code to avoid inconsistencies */ |
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/* XXX: only flush what is necessary */ |
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tb_flush(cpu); |
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} |
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} |
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} |
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void cpu_abort(CPUState *cpu, const char *fmt, ...) |
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{ |
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va_list ap; |
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va_list ap2; |
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va_start(ap, fmt); |
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va_copy(ap2, ap); |
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fprintf(stderr, "qemu: fatal: "); |
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vfprintf(stderr, fmt, ap); |
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fprintf(stderr, "\n"); |
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cpu_dump_state(cpu, stderr, CPU_DUMP_FPU | CPU_DUMP_CCOP); |
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if (qemu_log_separate()) { |
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FILE *logfile = qemu_log_lock(); |
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qemu_log("qemu: fatal: "); |
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qemu_log_vprintf(fmt, ap2); |
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qemu_log("\n"); |
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log_cpu_state(cpu, CPU_DUMP_FPU | CPU_DUMP_CCOP); |
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qemu_log_flush(); |
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qemu_log_unlock(logfile); |
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qemu_log_close(); |
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} |
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va_end(ap2); |
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va_end(ap); |
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replay_finish(); |
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#if defined(CONFIG_USER_ONLY) |
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{ |
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struct sigaction act; |
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sigfillset(&act.sa_mask); |
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act.sa_handler = SIG_DFL; |
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act.sa_flags = 0; |
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sigaction(SIGABRT, &act, NULL); |
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} |
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#endif |
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abort(); |
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} |
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/* physical memory access (slow version, mainly for debug) */ |
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#if defined(CONFIG_USER_ONLY) |
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int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr, |
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void *ptr, target_ulong len, bool is_write) |
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{ |
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int flags; |
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target_ulong l, page; |
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void * p; |
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uint8_t *buf = ptr; |
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while (len > 0) { |
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page = addr & TARGET_PAGE_MASK; |
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l = (page + TARGET_PAGE_SIZE) - addr; |
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if (l > len) |
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l = len; |
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flags = page_get_flags(page); |
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if (!(flags & PAGE_VALID)) |
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return -1; |
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if (is_write) { |
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if (!(flags & PAGE_WRITE)) |
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return -1; |
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/* XXX: this code should not depend on lock_user */ |
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if (!(p = lock_user(VERIFY_WRITE, addr, l, 0))) |
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return -1; |
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memcpy(p, buf, l); |
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unlock_user(p, addr, l); |
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} else { |
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if (!(flags & PAGE_READ)) |
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return -1; |
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/* XXX: this code should not depend on lock_user */ |
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if (!(p = lock_user(VERIFY_READ, addr, l, 1))) |
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return -1; |
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memcpy(buf, p, l); |
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unlock_user(p, addr, 0); |
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} |
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len -= l; |
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buf += l; |
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addr += l; |
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} |
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return 0; |
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} |
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#endif |
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bool target_words_bigendian(void) |
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{ |
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#if defined(TARGET_WORDS_BIGENDIAN) |
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return true; |
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#else |
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return false; |
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#endif |
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} |
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void page_size_init(void) |
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{ |
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/* NOTE: we can always suppose that qemu_host_page_size >=
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TARGET_PAGE_SIZE */ |
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if (qemu_host_page_size == 0) { |
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qemu_host_page_size = qemu_real_host_page_size; |
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} |
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if (qemu_host_page_size < TARGET_PAGE_SIZE) { |
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qemu_host_page_size = TARGET_PAGE_SIZE; |
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} |
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qemu_host_page_mask = -(intptr_t)qemu_host_page_size; |
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} |
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