added vm86.c
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@143 c046a42c-6fe2-441c-8c8c-71466251a162
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bellard
parent
9d27abd94f
commit
631271d716
@ -54,6 +54,8 @@ typedef struct TaskState {
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struct TaskState *next;
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struct TaskState *next;
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struct target_vm86plus_struct *target_v86;
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struct target_vm86plus_struct *target_v86;
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struct vm86_saved_state vm86_saved_regs;
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struct vm86_saved_state vm86_saved_regs;
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uint32_t v86flags;
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uint32_t v86mask;
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int used; /* non zero if used */
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int used; /* non zero if used */
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uint8_t stack[0];
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uint8_t stack[0];
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} __attribute__((aligned(16))) TaskState;
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} __attribute__((aligned(16))) TaskState;
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@ -73,9 +75,17 @@ void cpu_loop(CPUX86State *env);
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void process_pending_signals(void *cpu_env);
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void process_pending_signals(void *cpu_env);
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void signal_init(void);
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void signal_init(void);
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int queue_signal(int sig, target_siginfo_t *info);
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int queue_signal(int sig, target_siginfo_t *info);
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void save_v86_state(CPUX86State *env);
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void init_paths(const char *prefix);
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void init_paths(const char *prefix);
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const char *path(const char *pathname);
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const char *path(const char *pathname);
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extern int loglevel;
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extern int loglevel;
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extern FILE *logfile;
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/* vm86.c */
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void save_v86_state(CPUX86State *env);
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void do_int(CPUX86State *env, int intno);
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void handle_vm86_fault(CPUX86State *env);
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int do_vm86(CPUX86State *env, long subfunction,
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struct target_vm86plus_struct * target_v86);
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#endif
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#endif
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@ -1058,78 +1058,6 @@ int do_modify_ldt(CPUX86State *env, int func, void *ptr, unsigned long bytecount
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return ret;
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return ret;
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}
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}
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/* vm86 emulation */
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#define SAFE_MASK (0xDD5)
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int do_vm86(CPUX86State *env, long subfunction,
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struct target_vm86plus_struct * target_v86)
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{
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TaskState *ts = env->opaque;
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int ret;
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switch (subfunction) {
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case TARGET_VM86_REQUEST_IRQ:
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case TARGET_VM86_FREE_IRQ:
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case TARGET_VM86_GET_IRQ_BITS:
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case TARGET_VM86_GET_AND_RESET_IRQ:
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gemu_log("qemu: unsupported vm86 subfunction (%ld)\n", subfunction);
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ret = -EINVAL;
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goto out;
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case TARGET_VM86_PLUS_INSTALL_CHECK:
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/* NOTE: on old vm86 stuff this will return the error
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from verify_area(), because the subfunction is
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interpreted as (invalid) address to vm86_struct.
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So the installation check works.
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*/
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ret = 0;
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goto out;
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}
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ts->target_v86 = target_v86;
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/* save current CPU regs */
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ts->vm86_saved_regs.eax = 0; /* default vm86 syscall return code */
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ts->vm86_saved_regs.ebx = env->regs[R_EBX];
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ts->vm86_saved_regs.ecx = env->regs[R_ECX];
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ts->vm86_saved_regs.edx = env->regs[R_EDX];
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ts->vm86_saved_regs.esi = env->regs[R_ESI];
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ts->vm86_saved_regs.edi = env->regs[R_EDI];
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ts->vm86_saved_regs.ebp = env->regs[R_EBP];
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ts->vm86_saved_regs.esp = env->regs[R_ESP];
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ts->vm86_saved_regs.eflags = env->eflags;
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ts->vm86_saved_regs.eip = env->eip;
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ts->vm86_saved_regs.cs = env->segs[R_CS];
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ts->vm86_saved_regs.ss = env->segs[R_SS];
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ts->vm86_saved_regs.ds = env->segs[R_DS];
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ts->vm86_saved_regs.es = env->segs[R_ES];
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ts->vm86_saved_regs.fs = env->segs[R_FS];
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ts->vm86_saved_regs.gs = env->segs[R_GS];
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/* build vm86 CPU state */
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env->eflags = (env->eflags & ~SAFE_MASK) |
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(tswap32(target_v86->regs.eflags) & SAFE_MASK) | VM_MASK;
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env->regs[R_EBX] = tswap32(target_v86->regs.ebx);
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env->regs[R_ECX] = tswap32(target_v86->regs.ecx);
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env->regs[R_EDX] = tswap32(target_v86->regs.edx);
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env->regs[R_ESI] = tswap32(target_v86->regs.esi);
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env->regs[R_EDI] = tswap32(target_v86->regs.edi);
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env->regs[R_EBP] = tswap32(target_v86->regs.ebp);
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env->regs[R_ESP] = tswap32(target_v86->regs.esp);
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env->eip = tswap32(target_v86->regs.eip);
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cpu_x86_load_seg(env, R_CS, tswap16(target_v86->regs.cs));
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cpu_x86_load_seg(env, R_SS, tswap16(target_v86->regs.ss));
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cpu_x86_load_seg(env, R_DS, tswap16(target_v86->regs.ds));
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cpu_x86_load_seg(env, R_ES, tswap16(target_v86->regs.es));
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cpu_x86_load_seg(env, R_FS, tswap16(target_v86->regs.fs));
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cpu_x86_load_seg(env, R_GS, tswap16(target_v86->regs.gs));
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ret = tswap32(target_v86->regs.eax); /* eax will be restored at
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the end of the syscall */
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/* now the virtual CPU is ready for vm86 execution ! */
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out:
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return ret;
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}
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/* this stack is the equivalent of the kernel stack associated with a
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/* this stack is the equivalent of the kernel stack associated with a
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thread/process */
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thread/process */
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#define NEW_STACK_SIZE 8192
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#define NEW_STACK_SIZE 8192
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