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force IOPL=3 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@257 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-06-21 13:14:43 +00:00
parent a52c757c9f
commit c05bab779e
1 changed files with 22 additions and 20 deletions
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42
linux-user/vm86.c
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@ -73,17 +73,17 @@ void save_v86_state(CPUX86State *env)
ts->target_v86->regs.ebp = tswap32(env->regs[R_EBP]);
ts->target_v86->regs.esp = tswap32(env->regs[R_ESP]);
ts->target_v86->regs.eip = tswap32(env->eip);
ts->target_v86->regs.cs = tswap16(env->segs[R_CS]);
ts->target_v86->regs.ss = tswap16(env->segs[R_SS]);
ts->target_v86->regs.ds = tswap16(env->segs[R_DS]);
ts->target_v86->regs.es = tswap16(env->segs[R_ES]);
ts->target_v86->regs.fs = tswap16(env->segs[R_FS]);
ts->target_v86->regs.gs = tswap16(env->segs[R_GS]);
ts->target_v86->regs.cs = tswap16(env->segs[R_CS].selector);
ts->target_v86->regs.ss = tswap16(env->segs[R_SS].selector);
ts->target_v86->regs.ds = tswap16(env->segs[R_DS].selector);
ts->target_v86->regs.es = tswap16(env->segs[R_ES].selector);
ts->target_v86->regs.fs = tswap16(env->segs[R_FS].selector);
ts->target_v86->regs.gs = tswap16(env->segs[R_GS].selector);
set_flags(env->eflags, ts->v86flags, VIF_MASK | ts->v86mask);
ts->target_v86->regs.eflags = tswap32(env->eflags);
#ifdef DEBUG_VM86
fprintf(logfile, "save_v86_state: eflags=%08x cs:ip=%04x:%04x\n",
env->eflags, env->segs[R_CS], env->eip);
env->eflags, env->segs[R_CS].selector, env->eip);
#endif
/* restore 32 bit registers */
@ -180,6 +180,7 @@ static inline unsigned int get_vflags(CPUX86State *env)
flags = env->eflags & RETURN_MASK;
if (ts->v86flags & VIF_MASK)
flags |= IF_MASK;
flags |= IOPL_MASK;
return flags | (ts->v86flags & ts->v86mask);
}
@ -194,7 +195,7 @@ static void do_int(CPUX86State *env, int intno)
uint8_t *ssp;
unsigned int sp;
if (env->segs[R_CS] == TARGET_BIOSSEG)
if (env->segs[R_CS].selector == TARGET_BIOSSEG)
goto cannot_handle;
if (is_revectored(intno, &ts->vm86plus.int_revectored))
goto cannot_handle;
@ -210,10 +211,10 @@ static void do_int(CPUX86State *env, int intno)
intno, segoffs >> 16, segoffs & 0xffff);
#endif
/* save old state */
ssp = (uint8_t *)(env->segs[R_SS] << 4);
ssp = (uint8_t *)(env->segs[R_SS].selector << 4);
sp = env->regs[R_ESP] & 0xffff;
vm_putw(ssp, sp - 2, get_vflags(env));
vm_putw(ssp, sp - 4, env->segs[R_CS]);
vm_putw(ssp, sp - 4, env->segs[R_CS].selector);
vm_putw(ssp, sp - 6, env->eip);
ADD16(env->regs[R_ESP], -6);
/* goto interrupt handler */
@ -257,16 +258,16 @@ void handle_vm86_fault(CPUX86State *env)
unsigned int ip, sp, newflags, newip, newcs, opcode, intno;
int data32, pref_done;
csp = (uint8_t *)(env->segs[R_CS] << 4);
csp = (uint8_t *)(env->segs[R_CS].selector << 4);
ip = env->eip & 0xffff;
pc = csp + ip;
ssp = (uint8_t *)(env->segs[R_SS] << 4);
ssp = (uint8_t *)(env->segs[R_SS].selector << 4);
sp = env->regs[R_ESP] & 0xffff;
#if defined(DEBUG_VM86)
fprintf(logfile, "VM86 exception %04x:%08x %02x %02x\n",
env->segs[R_CS], env->eip, pc[0], pc[1]);
env->segs[R_CS].selector, env->eip, pc[0], pc[1]);
#endif
data32 = 0;
@ -413,12 +414,12 @@ int do_vm86(CPUX86State *env, long subfunction,
ts->vm86_saved_regs.esp = env->regs[R_ESP];
ts->vm86_saved_regs.eflags = env->eflags;
ts->vm86_saved_regs.eip = env->eip;
ts->vm86_saved_regs.cs = env->segs[R_CS];
ts->vm86_saved_regs.ss = env->segs[R_SS];
ts->vm86_saved_regs.ds = env->segs[R_DS];
ts->vm86_saved_regs.es = env->segs[R_ES];
ts->vm86_saved_regs.fs = env->segs[R_FS];
ts->vm86_saved_regs.gs = env->segs[R_GS];
ts->vm86_saved_regs.cs = env->segs[R_CS].selector;
ts->vm86_saved_regs.ss = env->segs[R_SS].selector;
ts->vm86_saved_regs.ds = env->segs[R_DS].selector;
ts->vm86_saved_regs.es = env->segs[R_ES].selector;
ts->vm86_saved_regs.fs = env->segs[R_FS].selector;
ts->vm86_saved_regs.gs = env->segs[R_GS].selector;
/* build vm86 CPU state */
ts->v86flags = tswap32(target_v86->regs.eflags);
@ -466,7 +467,8 @@ int do_vm86(CPUX86State *env, long subfunction,
target_v86->vm86plus.vm86dbg_intxxtab, 32);
#ifdef DEBUG_VM86
fprintf(logfile, "do_vm86: cs:ip=%04x:%04x\n", env->segs[R_CS], env->eip);
fprintf(logfile, "do_vm86: cs:ip=%04x:%04x\n",
env->segs[R_CS].selector, env->eip);
#endif
/* now the virtual CPU is ready for vm86 execution ! */
out: