diff options
Diffstat (limited to 'linux-user/vm86.c')
| -rw-r--r-- | linux-user/vm86.c | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/linux-user/vm86.c b/linux-user/vm86.c index 9f512a2..5091d53 100644 --- a/linux-user/vm86.c +++ b/linux-user/vm86.c @@ -47,30 +47,6 @@ static inline void vm_putw(CPUX86State *env, uint32_t segptr, cpu_stw_data(env, segptr + (reg16 & 0xffff), val); } -static inline void vm_putl(CPUX86State *env, uint32_t segptr, - unsigned int reg16, unsigned int val) -{ - cpu_stl_data(env, segptr + (reg16 & 0xffff), val); -} - -static inline unsigned int vm_getb(CPUX86State *env, - uint32_t segptr, unsigned int reg16) -{ - return cpu_ldub_data(env, segptr + (reg16 & 0xffff)); -} - -static inline unsigned int vm_getw(CPUX86State *env, - uint32_t segptr, unsigned int reg16) -{ - return cpu_lduw_data(env, segptr + (reg16 & 0xffff)); -} - -static inline unsigned int vm_getl(CPUX86State *env, - uint32_t segptr, unsigned int reg16) -{ - return cpu_ldl_data(env, segptr + (reg16 & 0xffff)); -} - void save_v86_state(CPUX86State *env) { CPUState *cs = env_cpu(env); @@ -131,19 +107,6 @@ static inline void return_to_32bit(CPUX86State *env, int retval) env->regs[R_EAX] = retval; } -static inline int set_IF(CPUX86State *env) -{ - CPUState *cs = env_cpu(env); - TaskState *ts = get_task_state(cs); - - ts->v86flags |= VIF_MASK; - if (ts->v86flags & VIP_MASK) { - return_to_32bit(env, TARGET_VM86_STI); - return 1; - } - return 0; -} - static inline void clear_IF(CPUX86State *env) { CPUState *cs = env_cpu(env); @@ -162,34 +125,6 @@ static inline void clear_AC(CPUX86State *env) env->eflags &= ~AC_MASK; } -static inline int set_vflags_long(unsigned long eflags, CPUX86State *env) -{ - CPUState *cs = env_cpu(env); - TaskState *ts = get_task_state(cs); - - set_flags(ts->v86flags, eflags, ts->v86mask); - set_flags(env->eflags, eflags, SAFE_MASK); - if (eflags & IF_MASK) - return set_IF(env); - else - clear_IF(env); - return 0; -} - -static inline int set_vflags_short(unsigned short flags, CPUX86State *env) -{ - CPUState *cs = env_cpu(env); - TaskState *ts = get_task_state(cs); - - set_flags(ts->v86flags, flags, ts->v86mask & 0xffff); - set_flags(env->eflags, flags, SAFE_MASK); - if (flags & IF_MASK) - return set_IF(env); - else - clear_IF(env); - return 0; -} - static inline unsigned int get_vflags(CPUX86State *env) { CPUState *cs = env_cpu(env); @@ -255,142 +190,6 @@ void handle_vm86_trap(CPUX86State *env, int trapno) } } -#define CHECK_IF_IN_TRAP() \ - if ((ts->vm86plus.vm86plus.flags & TARGET_vm86dbg_active) && \ - (ts->vm86plus.vm86plus.flags & TARGET_vm86dbg_TFpendig)) \ - newflags |= TF_MASK - -#define VM86_FAULT_RETURN \ - if ((ts->vm86plus.vm86plus.flags & TARGET_force_return_for_pic) && \ - (ts->v86flags & (IF_MASK | VIF_MASK))) \ - return_to_32bit(env, TARGET_VM86_PICRETURN); \ - return - -void handle_vm86_fault(CPUX86State *env) -{ - CPUState *cs = env_cpu(env); - TaskState *ts = get_task_state(cs); - uint32_t csp, ssp; - unsigned int ip, sp, newflags, newip, newcs, opcode, intno; - int data32, pref_done; - - csp = env->segs[R_CS].selector << 4; - ip = env->eip & 0xffff; - - ssp = env->segs[R_SS].selector << 4; - sp = env->regs[R_ESP] & 0xffff; - - LOG_VM86("VM86 exception %04x:%08x\n", - env->segs[R_CS].selector, env->eip); - - data32 = 0; - pref_done = 0; - do { - opcode = vm_getb(env, csp, ip); - ADD16(ip, 1); - switch (opcode) { - case 0x66: /* 32-bit data */ data32=1; break; - case 0x67: /* 32-bit address */ break; - case 0x2e: /* CS */ break; - case 0x3e: /* DS */ break; - case 0x26: /* ES */ break; - case 0x36: /* SS */ break; - case 0x65: /* GS */ break; - case 0x64: /* FS */ break; - case 0xf2: /* repnz */ break; - case 0xf3: /* rep */ break; - default: pref_done = 1; - } - } while (!pref_done); - - /* VM86 mode */ - switch(opcode) { - case 0x9c: /* pushf */ - if (data32) { - vm_putl(env, ssp, sp - 4, get_vflags(env)); - ADD16(env->regs[R_ESP], -4); - } else { - vm_putw(env, ssp, sp - 2, get_vflags(env)); - ADD16(env->regs[R_ESP], -2); - } - env->eip = ip; - VM86_FAULT_RETURN; - - case 0x9d: /* popf */ - if (data32) { - newflags = vm_getl(env, ssp, sp); - ADD16(env->regs[R_ESP], 4); - } else { - newflags = vm_getw(env, ssp, sp); - ADD16(env->regs[R_ESP], 2); - } - env->eip = ip; - CHECK_IF_IN_TRAP(); - if (data32) { - if (set_vflags_long(newflags, env)) - return; - } else { - if (set_vflags_short(newflags, env)) - return; - } - VM86_FAULT_RETURN; - - case 0xcd: /* int */ - intno = vm_getb(env, csp, ip); - ADD16(ip, 1); - env->eip = ip; - if (ts->vm86plus.vm86plus.flags & TARGET_vm86dbg_active) { - if ( (ts->vm86plus.vm86plus.vm86dbg_intxxtab[intno >> 3] >> - (intno &7)) & 1) { - return_to_32bit(env, TARGET_VM86_INTx + (intno << 8)); - return; - } - } - do_int(env, intno); - break; - - case 0xcf: /* iret */ - if (data32) { - newip = vm_getl(env, ssp, sp) & 0xffff; - newcs = vm_getl(env, ssp, sp + 4) & 0xffff; - newflags = vm_getl(env, ssp, sp + 8); - ADD16(env->regs[R_ESP], 12); - } else { - newip = vm_getw(env, ssp, sp); - newcs = vm_getw(env, ssp, sp + 2); - newflags = vm_getw(env, ssp, sp + 4); - ADD16(env->regs[R_ESP], 6); - } - env->eip = newip; - cpu_x86_load_seg(env, R_CS, newcs); - CHECK_IF_IN_TRAP(); - if (data32) { - if (set_vflags_long(newflags, env)) - return; - } else { - if (set_vflags_short(newflags, env)) - return; - } - VM86_FAULT_RETURN; - - case 0xfa: /* cli */ - env->eip = ip; - clear_IF(env); - VM86_FAULT_RETURN; - - case 0xfb: /* sti */ - env->eip = ip; - if (set_IF(env)) - return; - VM86_FAULT_RETURN; - - default: - /* real VM86 GPF exception */ - return_to_32bit(env, TARGET_VM86_UNKNOWN); - break; - } -} - int do_vm86(CPUX86State *env, long subfunction, abi_ulong vm86_addr) { CPUState *cs = env_cpu(env); |