/* * KQEMU support * * Copyright (c) 2005 Fabrice Bellard * * 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 */ #include "config.h" #ifdef _WIN32 #define WIN32_LEAN_AND_MEAN #include <windows.h> #include <winioctl.h> #else #include <sys/types.h> #include <sys/mman.h> #include <sys/ioctl.h> #endif #ifdef HOST_SOLARIS #include <sys/ioccom.h> #endif #include <stdlib.h> #include <stdio.h> #include <stdarg.h> #include <string.h> #include <errno.h> #include <unistd.h> #include <inttypes.h> #include "cpu.h" #include "exec-all.h" #include "qemu-common.h" #ifdef USE_KQEMU #define DEBUG //#define PROFILE #include <unistd.h> #include <fcntl.h> #include "kqemu.h" /* compatibility stuff */ #ifndef KQEMU_RET_SYSCALL #define KQEMU_RET_SYSCALL 0x0300 /* syscall insn */ #endif #ifndef KQEMU_MAX_RAM_PAGES_TO_UPDATE #define KQEMU_MAX_RAM_PAGES_TO_UPDATE 512 #define KQEMU_RAM_PAGES_UPDATE_ALL (KQEMU_MAX_RAM_PAGES_TO_UPDATE + 1) #endif #ifndef KQEMU_MAX_MODIFIED_RAM_PAGES #define KQEMU_MAX_MODIFIED_RAM_PAGES 512 #endif #ifdef _WIN32 #define KQEMU_DEVICE "\\\\.\\kqemu" #else #define KQEMU_DEVICE "/dev/kqemu" #endif #ifdef _WIN32 #define KQEMU_INVALID_FD INVALID_HANDLE_VALUE HANDLE kqemu_fd = KQEMU_INVALID_FD; #define kqemu_closefd(x) CloseHandle(x) #else #define KQEMU_INVALID_FD -1 int kqemu_fd = KQEMU_INVALID_FD; #define kqemu_closefd(x) close(x) #endif /* 0 = not allowed 1 = user kqemu 2 = kernel kqemu */ int kqemu_allowed = 1; unsigned long *pages_to_flush; unsigned int nb_pages_to_flush; unsigned long *ram_pages_to_update; unsigned int nb_ram_pages_to_update; unsigned long *modified_ram_pages; unsigned int nb_modified_ram_pages; uint8_t *modified_ram_pages_table; extern uint32_t **l1_phys_map; #define cpuid(index, eax, ebx, ecx, edx) \ asm volatile ("cpuid" \ : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx) \ : "0" (index)) #ifdef __x86_64__ static int is_cpuid_supported(void) { return 1; } #else static int is_cpuid_supported(void) { int v0, v1; asm volatile ("pushf\n" "popl %0\n" "movl %0, %1\n" "xorl $0x00200000, %0\n" "pushl %0\n" "popf\n" "pushf\n" "popl %0\n" : "=a" (v0), "=d" (v1) : : "cc"); return (v0 != v1); } #endif static void kqemu_update_cpuid(CPUState *env) { int critical_features_mask, features, ext_features, ext_features_mask; uint32_t eax, ebx, ecx, edx; /* the following features are kept identical on the host and target cpus because they are important for user code. Strictly speaking, only SSE really matters because the OS must support it if the user code uses it. */ critical_features_mask = CPUID_CMOV | CPUID_CX8 | CPUID_FXSR | CPUID_MMX | CPUID_SSE | CPUID_SSE2 | CPUID_SEP; ext_features_mask = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR; if (!is_cpuid_supported()) { features = 0; ext_features = 0; } else { cpuid(1, eax, ebx, ecx, edx); features = edx; ext_features = ecx; } #ifdef __x86_64__ /* NOTE: on x86_64 CPUs, SYSENTER is not supported in compatibility mode, so in order to have the best performances it is better not to use it */ features &= ~CPUID_SEP; #endif env->cpuid_features = (env->cpuid_features & ~critical_features_mask) | (features & critical_features_mask); env->cpuid_ext_features = (env->cpuid_ext_features & ~ext_features_mask) | (ext_features & ext_features_mask); /* XXX: we could update more of the target CPUID state so that the non accelerated code sees exactly the same CPU features as the accelerated code */ } int kqemu_init(CPUState *env) { struct kqemu_init init; int ret, version; #ifdef _WIN32 DWORD temp; #endif if (!kqemu_allowed) return -1; #ifdef _WIN32 kqemu_fd = CreateFile(KQEMU_DEVICE, GENERIC_WRITE | GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); #else kqemu_fd = open(KQEMU_DEVICE, O_RDWR); #endif if (kqemu_fd == KQEMU_INVALID_FD) { fprintf(stderr, "Could not open '%s' - QEMU acceleration layer not activated: %s\n", KQEMU_DEVICE, strerror(errno)); return -1; } version = 0; #ifdef _WIN32 DeviceIoControl(kqemu_fd, KQEMU_GET_VERSION, NULL, 0, &version, sizeof(version), &temp, NULL); #else ioctl(kqemu_fd, KQEMU_GET_VERSION, &version); #endif if (version != KQEMU_VERSION) { fprintf(stderr, "Version mismatch between kqemu module and qemu (%08x %08x) - disabling kqemu use\n", version, KQEMU_VERSION); goto fail; } pages_to_flush = qemu_vmalloc(KQEMU_MAX_PAGES_TO_FLUSH * sizeof(unsigned long)); if (!pages_to_flush) goto fail; ram_pages_to_update = qemu_vmalloc(KQEMU_MAX_RAM_PAGES_TO_UPDATE * sizeof(unsigned long)); if (!ram_pages_to_update) goto fail; modified_ram_pages = qemu_vmalloc(KQEMU_MAX_MODIFIED_RAM_PAGES * sizeof(unsigned long)); if (!modified_ram_pages) goto fail; modified_ram_pages_table = qemu_mallocz(phys_ram_size >> TARGET_PAGE_BITS); if (!modified_ram_pages_table) goto fail; init.ram_base = phys_ram_base; init.ram_size = phys_ram_size; init.ram_dirty = phys_ram_dirty; init.phys_to_ram_map = l1_phys_map; init.pages_to_flush = pages_to_flush; #if KQEMU_VERSION >= 0x010200 init.ram_pages_to_update = ram_pages_to_update; #endif #if KQEMU_VERSION >= 0x010300 init.modified_ram_pages = modified_ram_pages; #endif #ifdef _WIN32 ret = DeviceIoControl(kqemu_fd, KQEMU_INIT, &init, sizeof(init), NULL, 0, &temp, NULL) == TRUE ? 0 : -1; #else ret = ioctl(kqemu_fd, KQEMU_INIT, &init); #endif if (ret < 0) { fprintf(stderr, "Error %d while initializing QEMU acceleration layer - disabling it for now\n", ret); fail: kqemu_closefd(kqemu_fd); kqemu_fd = KQEMU_INVALID_FD; return -1; } kqemu_update_cpuid(env); env->kqemu_enabled = kqemu_allowed; nb_pages_to_flush = 0; nb_ram_pages_to_update = 0; return 0; } void kqemu_flush_page(CPUState *env, target_ulong addr) { #if defined(DEBUG) if (loglevel & CPU_LOG_INT) { fprintf(logfile, "kqemu_flush_page: addr=" TARGET_FMT_lx "\n", addr); } #endif if (nb_pages_to_flush >= KQEMU_MAX_PAGES_TO_FLUSH) nb_pages_to_flush = KQEMU_FLUSH_ALL; else pages_to_flush[nb_pages_to_flush++] = addr; } void kqemu_flush(CPUState *env, int global) { #ifdef DEBUG if (loglevel & CPU_LOG_INT) { fprintf(logfile, "kqemu_flush:\n"); } #endif nb_pages_to_flush = KQEMU_FLUSH_ALL; } void kqemu_set_notdirty(CPUState *env, ram_addr_t ram_addr) { #ifdef DEBUG if (loglevel & CPU_LOG_INT) { fprintf(logfile, "kqemu_set_notdirty: addr=%08lx\n", ram_addr); } #endif /* we only track transitions to dirty state */ if (phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] != 0xff) return; if (nb_ram_pages_to_update >= KQEMU_MAX_RAM_PAGES_TO_UPDATE) nb_ram_pages_to_update = KQEMU_RAM_PAGES_UPDATE_ALL; else ram_pages_to_update[nb_ram_pages_to_update++] = ram_addr; } static void kqemu_reset_modified_ram_pages(void) { int i; unsigned long page_index; for(i = 0; i < nb_modified_ram_pages; i++) { page_index = modified_ram_pages[i] >> TARGET_PAGE_BITS; modified_ram_pages_table[page_index] = 0; } nb_modified_ram_pages = 0; } void kqemu_modify_page(CPUState *env, ram_addr_t ram_addr) { unsigned long page_index; int ret; #ifdef _WIN32 DWORD temp; #endif page_index = ram_addr >> TARGET_PAGE_BITS; if (!modified_ram_pages_table[page_index]) { #if 0 printf("%d: modify_page=%08lx\n", nb_modified_ram_pages, ram_addr); #endif modified_ram_pages_table[page_index] = 1; modified_ram_pages[nb_modified_ram_pages++] = ram_addr; if (nb_modified_ram_pages >= KQEMU_MAX_MODIFIED_RAM_PAGES) { /* flush */ #ifdef _WIN32 ret = DeviceIoControl(kqemu_fd, KQEMU_MODIFY_RAM_PAGES, &nb_modified_ram_pages, sizeof(nb_modified_ram_pages), NULL, 0, &temp, NULL); #else ret = ioctl(kqemu_fd, KQEMU_MODIFY_RAM_PAGES, &nb_modified_ram_pages); #endif kqemu_reset_modified_ram_pages(); } } } struct fpstate { uint16_t fpuc; uint16_t dummy1; uint16_t fpus; uint16_t dummy2; uint16_t fptag; uint16_t dummy3; uint32_t fpip; uint32_t fpcs; uint32_t fpoo; uint32_t fpos; uint8_t fpregs1[8 * 10]; }; struct fpxstate { uint16_t fpuc; uint16_t fpus; uint16_t fptag; uint16_t fop; uint32_t fpuip; uint16_t cs_sel; uint16_t dummy0; uint32_t fpudp; uint16_t ds_sel; uint16_t dummy1; uint32_t mxcsr; uint32_t mxcsr_mask; uint8_t fpregs1[8 * 16]; uint8_t xmm_regs[16 * 16]; uint8_t dummy2[96]; }; static struct fpxstate fpx1 __attribute__((aligned(16))); static void restore_native_fp_frstor(CPUState *env) { int fptag, i, j; struct fpstate fp1, *fp = &fp1; fp->fpuc = env->fpuc; fp->fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; fptag = 0; for (i=7; i>=0; i--) { fptag <<= 2; if (env->fptags[i]) { fptag |= 3; } else { /* the FPU automatically computes it */ } } fp->fptag = fptag; j = env->fpstt; for(i = 0;i < 8; i++) { memcpy(&fp->fpregs1[i * 10], &env->fpregs[j].d, 10); j = (j + 1) & 7; } asm volatile ("frstor %0" : "=m" (*fp)); } static void save_native_fp_fsave(CPUState *env) { int fptag, i, j; uint16_t fpuc; struct fpstate fp1, *fp = &fp1; asm volatile ("fsave %0" : : "m" (*fp)); env->fpuc = fp->fpuc; env->fpstt = (fp->fpus >> 11) & 7; env->fpus = fp->fpus & ~0x3800; fptag = fp->fptag; for(i = 0;i < 8; i++) { env->fptags[i] = ((fptag & 3) == 3); fptag >>= 2; } j = env->fpstt; for(i = 0;i < 8; i++) { memcpy(&env->fpregs[j].d, &fp->fpregs1[i * 10], 10); j = (j + 1) & 7; } /* we must restore the default rounding state */ fpuc = 0x037f | (env->fpuc & (3 << 10)); asm volatile("fldcw %0" : : "m" (fpuc)); } static void restore_native_fp_fxrstor(CPUState *env) { struct fpxstate *fp = &fpx1; int i, j, fptag; fp->fpuc = env->fpuc; fp->fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; fptag = 0; for(i = 0; i < 8; i++) fptag |= (env->fptags[i] << i); fp->fptag = fptag ^ 0xff; j = env->fpstt; for(i = 0;i < 8; i++) { memcpy(&fp->fpregs1[i * 16], &env->fpregs[j].d, 10); j = (j + 1) & 7; } if (env->cpuid_features & CPUID_SSE) { fp->mxcsr = env->mxcsr; /* XXX: check if DAZ is not available */ fp->mxcsr_mask = 0xffff; memcpy(fp->xmm_regs, env->xmm_regs, CPU_NB_REGS * 16); } asm volatile ("fxrstor %0" : "=m" (*fp)); } static void save_native_fp_fxsave(CPUState *env) { struct fpxstate *fp = &fpx1; int fptag, i, j; uint16_t fpuc; asm volatile ("fxsave %0" : : "m" (*fp)); env->fpuc = fp->fpuc; env->fpstt = (fp->fpus >> 11) & 7; env->fpus = fp->fpus & ~0x3800; fptag = fp->fptag ^ 0xff; for(i = 0;i < 8; i++) { env->fptags[i] = (fptag >> i) & 1; } j = env->fpstt; for(i = 0;i < 8; i++) { memcpy(&env->fpregs[j].d, &fp->fpregs1[i * 16], 10); j = (j + 1) & 7; } if (env->cpuid_features & CPUID_SSE) { env->mxcsr = fp->mxcsr; memcpy(env->xmm_regs, fp->xmm_regs, CPU_NB_REGS * 16); } /* we must restore the default rounding state */ asm volatile ("fninit"); fpuc = 0x037f | (env->fpuc & (3 << 10)); asm volatile("fldcw %0" : : "m" (fpuc)); } static int do_syscall(CPUState *env, struct kqemu_cpu_state *kenv) { int selector; selector = (env->star >> 32) & 0xffff; #ifdef __x86_64__ if (env->hflags & HF_LMA_MASK) { int code64; env->regs[R_ECX] = kenv->next_eip; env->regs[11] = env->eflags; code64 = env->hflags & HF_CS64_MASK; cpu_x86_set_cpl(env, 0); cpu_x86_load_seg_cache(env, R_CS, selector & 0xfffc, 0, 0xffffffff, DESC_G_MASK | DESC_P_MASK | DESC_S_MASK | DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK | DESC_L_MASK); cpu_x86_load_seg_cache(env, R_SS, (selector + 8) & 0xfffc, 0, 0xffffffff, DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | DESC_W_MASK | DESC_A_MASK); env->eflags &= ~env->fmask; if (code64) env->eip = env->lstar; else env->eip = env->cstar; } else #endif { env->regs[R_ECX] = (uint32_t)kenv->next_eip; cpu_x86_set_cpl(env, 0); cpu_x86_load_seg_cache(env, R_CS, selector & 0xfffc, 0, 0xffffffff, DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK); cpu_x86_load_seg_cache(env, R_SS, (selector + 8) & 0xfffc, 0, 0xffffffff, DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | DESC_W_MASK | DESC_A_MASK); env->eflags &= ~(IF_MASK | RF_MASK | VM_MASK); env->eip = (uint32_t)env->star; } return 2; } #ifdef CONFIG_PROFILER #define PC_REC_SIZE 1 #define PC_REC_HASH_BITS 16 #define PC_REC_HASH_SIZE (1 << PC_REC_HASH_BITS) typedef struct PCRecord { unsigned long pc; int64_t count; struct PCRecord *next; } PCRecord; static PCRecord *pc_rec_hash[PC_REC_HASH_SIZE]; static int nb_pc_records; static void kqemu_record_pc(unsigned long pc) { unsigned long h; PCRecord **pr, *r; h = pc / PC_REC_SIZE; h = h ^ (h >> PC_REC_HASH_BITS); h &= (PC_REC_HASH_SIZE - 1); pr = &pc_rec_hash[h]; for(;;) { r = *pr; if (r == NULL) break; if (r->pc == pc) { r->count++; return; } pr = &r->next; } r = malloc(sizeof(PCRecord)); r->count = 1; r->pc = pc; r->next = NULL; *pr = r; nb_pc_records++; } static int pc_rec_cmp(const void *p1, const void *p2) { PCRecord *r1 = *(PCRecord **)p1; PCRecord *r2 = *(PCRecord **)p2; if (r1->count < r2->count) return 1; else if (r1->count == r2->count) return 0; else return -1; } static void kqemu_record_flush(void) { PCRecord *r, *r_next; int h; for(h = 0; h < PC_REC_HASH_SIZE; h++) { for(r = pc_rec_hash[h]; r != NULL; r = r_next) { r_next = r->next; free(r); } pc_rec_hash[h] = NULL; } nb_pc_records = 0; } void kqemu_record_dump(void) { PCRecord **pr, *r; int i, h; FILE *f; int64_t total, sum; pr = malloc(sizeof(PCRecord *) * nb_pc_records); i = 0; total = 0; for(h = 0; h < PC_REC_HASH_SIZE; h++) { for(r = pc_rec_hash[h]; r != NULL; r = r->next) { pr[i++] = r; total += r->count; } } qsort(pr, nb_pc_records, sizeof(PCRecord *), pc_rec_cmp); f = fopen("/tmp/kqemu.stats", "w"); if (!f) { perror("/tmp/kqemu.stats"); exit(1); } fprintf(f, "total: %" PRId64 "\n", total); sum = 0; for(i = 0; i < nb_pc_records; i++) { r = pr[i]; sum += r->count; fprintf(f, "%08lx: %" PRId64 " %0.2f%% %0.2f%%\n", r->pc, r->count, (double)r->count / (double)total * 100.0, (double)sum / (double)total * 100.0); } fclose(f); free(pr); kqemu_record_flush(); } #endif int kqemu_cpu_exec(CPUState *env) { struct kqemu_cpu_state kcpu_state, *kenv = &kcpu_state; int ret, cpl, i; #ifdef CONFIG_PROFILER int64_t ti; #endif #ifdef _WIN32 DWORD temp; #endif #ifdef CONFIG_PROFILER ti = profile_getclock(); #endif #ifdef DEBUG if (loglevel & CPU_LOG_INT) { fprintf(logfile, "kqemu: cpu_exec: enter\n"); cpu_dump_state(env, logfile, fprintf, 0); } #endif memcpy(kenv->regs, env->regs, sizeof(kenv->regs)); kenv->eip = env->eip; kenv->eflags = env->eflags; memcpy(&kenv->segs, &env->segs, sizeof(env->segs)); memcpy(&kenv->ldt, &env->ldt, sizeof(env->ldt)); memcpy(&kenv->tr, &env->tr, sizeof(env->tr)); memcpy(&kenv->gdt, &env->gdt, sizeof(env->gdt)); memcpy(&kenv->idt, &env->idt, sizeof(env->idt)); kenv->cr0 = env->cr[0]; kenv->cr2 = env->cr[2]; kenv->cr3 = env->cr[3]; kenv->cr4 = env->cr[4]; kenv->a20_mask = env->a20_mask; #if KQEMU_VERSION >= 0x010100 kenv->efer = env->efer; #endif #if KQEMU_VERSION >= 0x010300 kenv->tsc_offset = 0; kenv->star = env->star; kenv->sysenter_cs = env->sysenter_cs; kenv->sysenter_esp = env->sysenter_esp; kenv->sysenter_eip = env->sysenter_eip; #ifdef __x86_64__ kenv->lstar = env->lstar; kenv->cstar = env->cstar; kenv->fmask = env->fmask; kenv->kernelgsbase = env->kernelgsbase; #endif #endif if (env->dr[7] & 0xff) { kenv->dr7 = env->dr[7]; kenv->dr0 = env->dr[0]; kenv->dr1 = env->dr[1]; kenv->dr2 = env->dr[2]; kenv->dr3 = env->dr[3]; } else { kenv->dr7 = 0; } kenv->dr6 = env->dr[6]; cpl = (env->hflags & HF_CPL_MASK); kenv->cpl = cpl; kenv->nb_pages_to_flush = nb_pages_to_flush; #if KQEMU_VERSION >= 0x010200 kenv->user_only = (env->kqemu_enabled == 1); kenv->nb_ram_pages_to_update = nb_ram_pages_to_update; #endif nb_ram_pages_to_update = 0; #if KQEMU_VERSION >= 0x010300 kenv->nb_modified_ram_pages = nb_modified_ram_pages; #endif kqemu_reset_modified_ram_pages(); if (env->cpuid_features & CPUID_FXSR) restore_native_fp_fxrstor(env); else restore_native_fp_frstor(env); #ifdef _WIN32 if (DeviceIoControl(kqemu_fd, KQEMU_EXEC, kenv, sizeof(struct kqemu_cpu_state), kenv, sizeof(struct kqemu_cpu_state), &temp, NULL)) { ret = kenv->retval; } else { ret = -1; } #else #if KQEMU_VERSION >= 0x010100 ioctl(kqemu_fd, KQEMU_EXEC, kenv); ret = kenv->retval; #else ret = ioctl(kqemu_fd, KQEMU_EXEC, kenv); #endif #endif if (env->cpuid_features & CPUID_FXSR) save_native_fp_fxsave(env); else save_native_fp_fsave(env); memcpy(env->regs, kenv->regs, sizeof(env->regs)); env->eip = kenv->eip; env->eflags = kenv->eflags; memcpy(env->segs, kenv->segs, sizeof(env->segs)); cpu_x86_set_cpl(env, kenv->cpl); memcpy(&env->ldt, &kenv->ldt, sizeof(env->ldt)); #if 0 /* no need to restore that */ memcpy(env->tr, kenv->tr, sizeof(env->tr)); memcpy(env->gdt, kenv->gdt, sizeof(env->gdt)); memcpy(env->idt, kenv->idt, sizeof(env->idt)); env->a20_mask = kenv->a20_mask; #endif env->cr[0] = kenv->cr0; env->cr[4] = kenv->cr4; env->cr[3] = kenv->cr3; env->cr[2] = kenv->cr2; env->dr[6] = kenv->dr6; #if KQEMU_VERSION >= 0x010300 #ifdef __x86_64__ env->kernelgsbase = kenv->kernelgsbase; #endif #endif /* flush pages as indicated by kqemu */ if (kenv->nb_pages_to_flush >= KQEMU_FLUSH_ALL) { tlb_flush(env, 1); } else { for(i = 0; i < kenv->nb_pages_to_flush; i++) { tlb_flush_page(env, pages_to_flush[i]); } } nb_pages_to_flush = 0; #ifdef CONFIG_PROFILER kqemu_time += profile_getclock() - ti; kqemu_exec_count++; #endif #if KQEMU_VERSION >= 0x010200 if (kenv->nb_ram_pages_to_update > 0) { cpu_tlb_update_dirty(env); } #endif #if KQEMU_VERSION >= 0x010300 if (kenv->nb_modified_ram_pages > 0) { for(i = 0; i < kenv->nb_modified_ram_pages; i++) { unsigned long addr; addr = modified_ram_pages[i]; tb_invalidate_phys_page_range(addr, addr + TARGET_PAGE_SIZE, 0); } } #endif /* restore the hidden flags */ { unsigned int new_hflags; #ifdef TARGET_X86_64 if ((env->hflags & HF_LMA_MASK) && (env->segs[R_CS].flags & DESC_L_MASK)) { /* long mode */ new_hflags = HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK; } else #endif { /* legacy / compatibility case */ new_hflags = (env->segs[R_CS].flags & DESC_B_MASK) >> (DESC_B_SHIFT - HF_CS32_SHIFT); new_hflags |= (env->segs[R_SS].flags & DESC_B_MASK) >> (DESC_B_SHIFT - HF_SS32_SHIFT); if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK) || !(env->hflags & HF_CS32_MASK)) { /* XXX: try to avoid this test. The problem comes from the fact that is real mode or vm86 mode we only modify the 'base' and 'selector' fields of the segment cache to go faster. A solution may be to force addseg to one in translate-i386.c. */ new_hflags |= HF_ADDSEG_MASK; } else { new_hflags |= ((env->segs[R_DS].base | env->segs[R_ES].base | env->segs[R_SS].base) != 0) << HF_ADDSEG_SHIFT; } } env->hflags = (env->hflags & ~(HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK | HF_ADDSEG_MASK)) | new_hflags; } /* update FPU flags */ env->hflags = (env->hflags & ~(HF_MP_MASK | HF_EM_MASK | HF_TS_MASK)) | ((env->cr[0] << (HF_MP_SHIFT - 1)) & (HF_MP_MASK | HF_EM_MASK | HF_TS_MASK)); if (env->cr[4] & CR4_OSFXSR_MASK) env->hflags |= HF_OSFXSR_MASK; else env->hflags &= ~HF_OSFXSR_MASK; #ifdef DEBUG if (loglevel & CPU_LOG_INT) { fprintf(logfile, "kqemu: kqemu_cpu_exec: ret=0x%x\n", ret); } #endif if (ret == KQEMU_RET_SYSCALL) { /* syscall instruction */ return do_syscall(env, kenv); } else if ((ret & 0xff00) == KQEMU_RET_INT) { env->exception_index = ret & 0xff; env->error_code = 0; env->exception_is_int = 1; env->exception_next_eip = kenv->next_eip; #ifdef CONFIG_PROFILER kqemu_ret_int_count++; #endif #ifdef DEBUG if (loglevel & CPU_LOG_INT) { fprintf(logfile, "kqemu: interrupt v=%02x:\n", env->exception_index); cpu_dump_state(env, logfile, fprintf, 0); } #endif return 1; } else if ((ret & 0xff00) == KQEMU_RET_EXCEPTION) { env->exception_index = ret & 0xff; env->error_code = kenv->error_code; env->exception_is_int = 0; env->exception_next_eip = 0; #ifdef CONFIG_PROFILER kqemu_ret_excp_count++; #endif #ifdef DEBUG if (loglevel & CPU_LOG_INT) { fprintf(logfile, "kqemu: exception v=%02x e=%04x:\n", env->exception_index, env->error_code); cpu_dump_state(env, logfile, fprintf, 0); } #endif return 1; } else if (ret == KQEMU_RET_INTR) { #ifdef CONFIG_PROFILER kqemu_ret_intr_count++; #endif #ifdef DEBUG if (loglevel & CPU_LOG_INT) { cpu_dump_state(env, logfile, fprintf, 0); } #endif return 0; } else if (ret == KQEMU_RET_SOFTMMU) { #ifdef CONFIG_PROFILER { unsigned long pc = env->eip + env->segs[R_CS].base; kqemu_record_pc(pc); } #endif #ifdef DEBUG if (loglevel & CPU_LOG_INT) { cpu_dump_state(env, logfile, fprintf, 0); } #endif return 2; } else { cpu_dump_state(env, stderr, fprintf, 0); fprintf(stderr, "Unsupported return value: 0x%x\n", ret); exit(1); } return 0; } void kqemu_cpu_interrupt(CPUState *env) { #if defined(_WIN32) && KQEMU_VERSION >= 0x010101 /* cancelling the I/O request causes KQEMU to finish executing the current block and successfully returning. */ CancelIo(kqemu_fd); #endif } #endif