Sparc32/64 CPU selection for user emulator

[qemu.git] / linux-user / vm86.c

diff --git a/linux-user/vm86.c b/linux-user/vm86.c
index 885762c06942f8df96387bd5836d0cc0ee96f77e..b28eea60d49d47dcd98368aa68859b592a3f7e0c 100644 (file)
--- a/linux-user/vm86.c
+++ b/linux-user/vm86.c
@@ -41,49 +41,52 @@ static inline int is_revectored(int nr, struct target_revectored_struct *bitmap)
 
 static inline void vm_putw(uint8_t *segptr, unsigned int reg16, unsigned int val)
 {
-    *(uint16_t *)(segptr + (reg16 & 0xffff)) = tswap16(val);
+    stw(segptr + (reg16 & 0xffff), val);
 }
 
 static inline void vm_putl(uint8_t *segptr, unsigned int reg16, unsigned int val)
 {
-    *(uint32_t *)(segptr + (reg16 & 0xffff)) = tswap32(val);
+    stl(segptr + (reg16 & 0xffff), val);
 }
 
 static inline unsigned int vm_getw(uint8_t *segptr, unsigned int reg16)
 {
-    return tswap16(*(uint16_t *)(segptr + (reg16 & 0xffff)));
+    return lduw(segptr + (reg16 & 0xffff));
 }
 
 static inline unsigned int vm_getl(uint8_t *segptr, unsigned int reg16)
 {
-    return tswap32(*(uint32_t *)(segptr + (reg16 & 0xffff)));
+    return ldl(segptr + (reg16 & 0xffff));
 }
 
 void save_v86_state(CPUX86State *env)
 {
     TaskState *ts = env->opaque;
+    struct target_vm86plus_struct * target_v86;
 
+    lock_user_struct(target_v86, ts->target_v86, 0);
     /* put the VM86 registers in the userspace register structure */
-    ts->target_v86->regs.eax = tswap32(env->regs[R_EAX]);
-    ts->target_v86->regs.ebx = tswap32(env->regs[R_EBX]);
-    ts->target_v86->regs.ecx = tswap32(env->regs[R_ECX]);
-    ts->target_v86->regs.edx = tswap32(env->regs[R_EDX]);
-    ts->target_v86->regs.esi = tswap32(env->regs[R_ESI]);
-    ts->target_v86->regs.edi = tswap32(env->regs[R_EDI]);
-    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]);
+    target_v86->regs.eax = tswap32(env->regs[R_EAX]);
+    target_v86->regs.ebx = tswap32(env->regs[R_EBX]);
+    target_v86->regs.ecx = tswap32(env->regs[R_ECX]);
+    target_v86->regs.edx = tswap32(env->regs[R_EDX]);
+    target_v86->regs.esi = tswap32(env->regs[R_ESI]);
+    target_v86->regs.edi = tswap32(env->regs[R_EDI]);
+    target_v86->regs.ebp = tswap32(env->regs[R_EBP]);
+    target_v86->regs.esp = tswap32(env->regs[R_ESP]);
+    target_v86->regs.eip = tswap32(env->eip);
+    target_v86->regs.cs = tswap16(env->segs[R_CS].selector);
+    target_v86->regs.ss = tswap16(env->segs[R_SS].selector);
+    target_v86->regs.ds = tswap16(env->segs[R_DS].selector);
+    target_v86->regs.es = tswap16(env->segs[R_ES].selector);
+    target_v86->regs.fs = tswap16(env->segs[R_FS].selector);
+    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);
+    target_v86->regs.eflags = tswap32(env->eflags);
+    unlock_user_struct(target_v86, ts->target_v86, 1);
 #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 +183,7 @@ 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 +198,7 @@ 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 +214,10 @@ 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 +261,16 @@ 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;
@@ -377,10 +381,10 @@ void handle_vm86_fault(CPUX86State *env)
     }
 }
 
-int do_vm86(CPUX86State *env, long subfunction, 
-            struct target_vm86plus_struct * target_v86)
+int do_vm86(CPUX86State *env, long subfunction, target_ulong vm86_addr)
 {
     TaskState *ts = env->opaque;
+    struct target_vm86plus_struct * target_v86;
     int ret;
     
     switch (subfunction) {
@@ -401,7 +405,6 @@ int do_vm86(CPUX86State *env, long subfunction,
         goto out;
     }
 
-    ts->target_v86 = target_v86;
     /* save current CPU regs */
     ts->vm86_saved_regs.eax = 0; /* default vm86 syscall return code */
     ts->vm86_saved_regs.ebx = env->regs[R_EBX];
@@ -413,13 +416,15 @@ 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;
+
+    ts->target_v86 = vm86_addr;
+    lock_user_struct(target_v86, vm86_addr, 1);
     /* build vm86 CPU state */
     ts->v86flags = tswap32(target_v86->regs.eflags);
     env->eflags = (env->eflags & ~SAFE_MASK) | 
@@ -464,9 +469,11 @@ int do_vm86(CPUX86State *env, long subfunction,
     ts->vm86plus.vm86plus.flags = tswapl(target_v86->vm86plus.flags);
     memcpy(&ts->vm86plus.vm86plus.vm86dbg_intxxtab, 
            target_v86->vm86plus.vm86dbg_intxxtab, 32);
+    unlock_user_struct(target_v86, vm86_addr, 0);
     
 #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: