Generate m68k address faults.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2871 c046a42c-6fe2-441c-8c8c-71466251a162

Generate m68k address faults.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2871 c046a42c-6fe2-441c-8c8c-71466251a162
pbrook
1 parent e6dbd3b3
Showing 1 changed file with 88 additions and 43 deletions
target-m68k/translate.c
@@ -43,6 +43,7 @@ static inline void qemu_assert(int cond, const char *msg)
 /* internal defines */
 typedef struct DisasContext {
     CPUM68KState *env;
+    target_ulong insn_pc; /* Start of the current instruction.  */
     target_ulong pc;
     int is_jmp;
     int cc_op;
@@ -437,8 +438,7 @@ static int gen_lea(DisasContext *s, uint16_t insn, int opsize)
     switch ((insn >> 3) & 7) {
     case 0: /* Data register direct.  */
     case 1: /* Address register direct.  */
-        /* ??? generate bad addressing mode fault.  */
-        qemu_assert(0, "invalid addressing mode");
+        return -1;
     case 2: /* Indirect register */
     case 3: /* Indirect postincrement.  */
         reg += QREG_A0;
@@ -477,8 +477,7 @@ static int gen_lea(DisasContext *s, uint16_t insn, int opsize)
             return gen_lea_indexed(s, opsize, -1);
         case 4: /* Immediate.  */
         default:
-            /* ??? generate bad addressing mode fault.  */
-            qemu_assert(0, "invalid addressing mode");
+            return -1;
         }
     }
     /* Should never happen.  */
@@ -496,6 +495,8 @@ static inline int gen_ea_once(DisasContext *s, uint16_t insn, int opsize,
         tmp = *addrp;
     } else {
         tmp = gen_lea(s, insn, opsize);
+        if (tmp == -1)
+            return -1;
         if (addrp)
             *addrp = tmp;
     }
@@ -548,6 +549,8 @@ static int gen_ea(DisasContext *s, uint16_t insn, int opsize, int val,
                 tmp = *addrp;
             } else {
                 tmp = gen_lea(s, insn, opsize);
+                if (tmp == -1)
+                    return -1;
                 if (addrp)
                     *addrp = tmp;
             }
@@ -595,7 +598,7 @@ static int gen_ea(DisasContext *s, uint16_t insn, int opsize, int val,
             }
             return gen_im32(offset);
         default:
-            qemu_assert(0, "invalid addressing mode");
+            return -1;
         }
     }
     /* Should never happen.  */
@@ -753,6 +756,27 @@ static void gen_exception(DisasContext *s, uint32_t where, int nr)
     gen_op_raise_exception(nr);
 }
+static inline void gen_addr_fault(DisasContext *s)
+{
+    gen_exception(s, s->insn_pc, EXCP_ADDRESS);
+}
+
+#define SRC_EA(result, opsize, val, addrp) do { \
+    result = gen_ea(s, insn, opsize, val, addrp); \
+    if (result == -1) { \
+        gen_addr_fault(s); \
+        return; \
+    } \
+    } while (0)
+
+#define DEST_EA(insn, opsize, val, addrp) do { \
+    int ea_result = gen_ea(s, insn, opsize, val, addrp); \
+    if (ea_result == -1) { \
+        gen_addr_fault(s); \
+        return; \
+    } \
+    } while (0)
+
 /* Generate a jump to an immediate address.  */
 static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest)
 {
@@ -806,7 +830,7 @@ DISAS_INSN(mulw)
         gen_op_ext16s32(tmp, reg);
     else
         gen_op_ext16u32(tmp, reg);
-    src = gen_ea(s, insn, OS_WORD, sign ? -1 : 0, NULL);
+    SRC_EA(src, OS_WORD, sign ? -1 : 0, NULL);
     gen_op_mul32(tmp, tmp, src);
     gen_op_mov32(reg, tmp);
     /* Unlike m68k, coldfire always clears the overflow bit.  */
@@ -827,7 +851,7 @@ DISAS_INSN(divw)
     } else {
         gen_op_ext16u32(QREG_DIV1, reg);
     }
-    src = gen_ea(s, insn, OS_WORD, sign ? -1 : 0, NULL);
+    SRC_EA(src, OS_WORD, sign ? -1 : 0, NULL);
     gen_op_mov32(QREG_DIV2, src);
     if (sign) {
         gen_op_divs(1);
@@ -860,7 +884,7 @@ DISAS_INSN(divl)
     num = DREG(ext, 12);
     reg = DREG(ext, 0);
     gen_op_mov32(QREG_DIV1, num);
-    den = gen_ea(s, insn, OS_LONG, 0, NULL);
+    SRC_EA(den, OS_LONG, 0, NULL);
     gen_op_mov32(QREG_DIV2, den);
     if (ext & 0x0800) {
         gen_op_divs(2);
@@ -891,11 +915,11 @@ DISAS_INSN(addsub)
     reg = DREG(insn, 9);
     dest = gen_new_qreg(QMODE_I32);
     if (insn & 0x100) {
-        tmp = gen_ea(s, insn, OS_LONG, 0, &addr);
+        SRC_EA(tmp, OS_LONG, 0, &addr);
         src = reg;
     } else {
         tmp = reg;
-        src = gen_ea(s, insn, OS_LONG, 0, NULL);
+        SRC_EA(src, OS_LONG, 0, NULL);
     }
     if (add) {
         gen_op_add32(dest, tmp, src);
@@ -908,7 +932,7 @@ DISAS_INSN(addsub)
     }
     gen_op_update_cc_add(dest, src);
     if (insn & 0x100) {
-        gen_ea(s, insn, OS_LONG, dest, &addr);
+        DEST_EA(insn, OS_LONG, dest, &addr);
     } else {
         gen_op_mov32(reg, dest);
     }
@@ -966,7 +990,7 @@ DISAS_INSN(bitop_reg)
     else
         opsize = OS_LONG;
     op = (insn >> 6) & 3;
-    src1 = gen_ea(s, insn, opsize, 0, op ? &addr: NULL);
+    SRC_EA(src1, opsize, 0, op ? &addr: NULL);
     src2 = DREG(insn, 9);
     dest = gen_new_qreg(QMODE_I32);
@@ -996,7 +1020,7 @@ DISAS_INSN(bitop_reg)
         break;
     }
     if (op)
-        gen_ea(s, insn, opsize, dest, &addr);
+        DEST_EA(insn, opsize, dest, &addr);
 }
 DISAS_INSN(sats)
@@ -1041,6 +1065,10 @@ DISAS_INSN(movem)
     mask = lduw_code(s->pc);
     s->pc += 2;
     tmp = gen_lea(s, insn, OS_LONG);
+    if (tmp == -1) {
+        gen_addr_fault(s);
+        return;
+    }
     addr = gen_new_qreg(QMODE_I32);
     gen_op_mov32(addr, tmp);
     is_load = ((insn & 0x0400) != 0);
@@ -1086,7 +1114,7 @@ DISAS_INSN(bitop_im)
         return;
     }
-    src1 = gen_ea(s, insn, opsize, 0, op ? &addr: NULL);
+    SRC_EA(src1, opsize, 0, op ? &addr: NULL);
     gen_flush_flags(s);
     tmp = gen_new_qreg(QMODE_I32);
@@ -1116,7 +1144,7 @@ DISAS_INSN(bitop_im)
         break;
     }
     if (op)
-        gen_ea(s, insn, opsize, dest, &addr);
+        DEST_EA(insn, opsize, dest, &addr);
 }
 DISAS_INSN(arith_im)
@@ -1128,7 +1156,7 @@ DISAS_INSN(arith_im)
     int addr;
     op = (insn >> 9) & 7;
-    src1 = gen_ea(s, insn, OS_LONG, 0, (op == 6) ? NULL : &addr);
+    SRC_EA(src1, OS_LONG, 0, (op == 6) ? NULL : &addr);
     src2 = gen_im32(read_im32(s));
     dest = gen_new_qreg(QMODE_I32);
     switch (op) {
@@ -1168,7 +1196,7 @@ DISAS_INSN(arith_im)
         abort();
     }
     if (op != 6) {
-        gen_ea(s, insn, OS_LONG, dest, &addr);
+        DEST_EA(insn, OS_LONG, dest, &addr);
     }
 }
@@ -1200,7 +1228,7 @@ DISAS_INSN(move)
     default:
         abort();
     }
-    src = gen_ea(s, insn, opsize, -1, NULL);
+    SRC_EA(src, opsize, -1, NULL);
     op = (insn >> 6) & 7;
     if (op == 1) {
         /* movea */
@@ -1211,7 +1239,7 @@ DISAS_INSN(move)
         /* normal move */
         uint16_t dest_ea;
         dest_ea = ((insn >> 9) & 7) | (op << 3);
-        gen_ea(s, dest_ea, opsize, src, NULL);
+        DEST_EA(dest_ea, opsize, src, NULL);
         /* This will be correct because loads sign extend.  */
         gen_logic_cc(s, src);
     }
@@ -1247,6 +1275,10 @@ DISAS_INSN(lea)
     reg = AREG(insn, 9);
     tmp = gen_lea(s, insn, OS_LONG);
+    if (tmp == -1) {
+        gen_addr_fault(s);
+        return;
+    }
     gen_op_mov32(reg, tmp);
 }
@@ -1267,7 +1299,7 @@ DISAS_INSN(clr)
     default:
         abort();
     }
-    gen_ea (s, insn, opsize, gen_im32(0), NULL);
+    DEST_EA(insn, opsize, gen_im32(0), NULL);
     gen_logic_cc(s, gen_im32(0));
 }
@@ -1384,6 +1416,10 @@ DISAS_INSN(pea)
     int tmp;
     tmp = gen_lea(s, insn, OS_LONG);
+    if (tmp == -1) {
+        gen_addr_fault(s);
+        return;
+    }
     gen_push(s, tmp);
 }
@@ -1425,7 +1461,7 @@ DISAS_INSN(tst)
     default:
         abort();
     }
-    tmp = gen_ea(s, insn, opsize, -1, NULL);
+    SRC_EA(tmp, opsize, -1, NULL);
     gen_logic_cc(s, tmp);
 }
@@ -1447,10 +1483,10 @@ DISAS_INSN(tas)
     int addr;
     dest = gen_new_qreg(QMODE_I32);
-    src1 = gen_ea(s, insn, OS_BYTE, -1, &addr);
+    SRC_EA(src1, OS_BYTE, -1, &addr);
     gen_logic_cc(s, src1);
     gen_op_or32(dest, src1, gen_im32(0x80));
-    gen_ea(s, insn, OS_BYTE, dest, &addr);
+    DEST_EA(insn, OS_BYTE, dest, &addr);
 }
 DISAS_INSN(mull)
@@ -1469,7 +1505,7 @@ DISAS_INSN(mull)
         return;
     }
     reg = DREG(ext, 12);
-    src1 = gen_ea(s, insn, OS_LONG, 0, NULL);
+    SRC_EA(src1, OS_LONG, 0, NULL);
     dest = gen_new_qreg(QMODE_I32);
     gen_op_mul32(dest, src1, reg);
     gen_op_mov32(reg, dest);
@@ -1528,6 +1564,10 @@ DISAS_INSN(jump)
     /* Load the target address first to ensure correct exception
        behavior.  */
     tmp = gen_lea(s, insn, OS_LONG);
+    if (tmp == -1) {
+        gen_addr_fault(s);
+        return;
+    }
     if ((insn & 0x40) == 0) {
         /* jsr */
         gen_push(s, gen_im32(s->pc));
@@ -1543,7 +1583,7 @@ DISAS_INSN(addsubq)
     int val;
     int addr;
-    src1 = gen_ea(s, insn, OS_LONG, 0, &addr);
+    SRC_EA(src1, OS_LONG, 0, &addr);
     val = (insn >> 9) & 7;
     if (val == 0)
         val = 8;
@@ -1570,7 +1610,7 @@ DISAS_INSN(addsubq)
         }
         gen_op_update_cc_add(dest, src2);
     }
-    gen_ea(s, insn, OS_LONG, dest, &addr);
+    DEST_EA(insn, OS_LONG, dest, &addr);
 }
 DISAS_INSN(tpf)
@@ -1642,7 +1682,7 @@ DISAS_INSN(mvzs)
         opsize = OS_WORD;
     else
         opsize = OS_BYTE;
-    src = gen_ea(s, insn, opsize, (insn & 0x80) ? 0 : -1, NULL);
+    SRC_EA(src, opsize, (insn & 0x80) ? 0 : -1, NULL);
     reg = DREG(insn, 9);
     gen_op_mov32(reg, src);
     gen_logic_cc(s, src);
@@ -1658,11 +1698,11 @@ DISAS_INSN(or)
     reg = DREG(insn, 9);
     dest = gen_new_qreg(QMODE_I32);
     if (insn & 0x100) {
-        src = gen_ea(s, insn, OS_LONG, 0, &addr);
+        SRC_EA(src, OS_LONG, 0, &addr);
         gen_op_or32(dest, src, reg);
-        gen_ea(s, insn, OS_LONG, dest, &addr);
+        DEST_EA(insn, OS_LONG, dest, &addr);
     } else {
-        src = gen_ea(s, insn, OS_LONG, 0, NULL);
+        SRC_EA(src, OS_LONG, 0, NULL);
         gen_op_or32(dest, src, reg);
         gen_op_mov32(reg, dest);
     }
@@ -1674,7 +1714,7 @@ DISAS_INSN(suba)
     int src;
     int reg;
-    src = gen_ea(s, insn, OS_LONG, 0, NULL);
+    SRC_EA(src, OS_LONG, 0, NULL);
     reg = AREG(insn, 9);
     gen_op_sub32(reg, reg, src);
 }
@@ -1714,7 +1754,7 @@ DISAS_INSN(mov3q)
         val = -1;
     src = gen_im32(val);
     gen_logic_cc(s, src);
-    gen_ea(s, insn, OS_LONG, src, NULL);
+    DEST_EA(insn, OS_LONG, src, NULL);
 }
 DISAS_INSN(cmp)
@@ -1742,7 +1782,7 @@ DISAS_INSN(cmp)
     default:
         abort();
     }
-    src = gen_ea(s, insn, opsize, -1, NULL);
+    SRC_EA(src, opsize, -1, NULL);
     reg = DREG(insn, 9);
     dest = gen_new_qreg(QMODE_I32);
     gen_op_sub32(dest, reg, src);
@@ -1761,7 +1801,7 @@ DISAS_INSN(cmpa)
     } else {
         opsize = OS_WORD;
     }
-    src = gen_ea(s, insn, opsize, -1, NULL);
+    SRC_EA(src, opsize, -1, NULL);
     reg = AREG(insn, 9);
     dest = gen_new_qreg(QMODE_I32);
     gen_op_sub32(dest, reg, src);
@@ -1776,12 +1816,12 @@ DISAS_INSN(eor)
     int dest;
     int addr;
-    src = gen_ea(s, insn, OS_LONG, 0, &addr);
+    SRC_EA(src, OS_LONG, 0, &addr);
     reg = DREG(insn, 9);
     dest = gen_new_qreg(QMODE_I32);
     gen_op_xor32(dest, src, reg);
     gen_logic_cc(s, dest);
-    gen_ea(s, insn, OS_LONG, dest, &addr);
+    DEST_EA(insn, OS_LONG, dest, &addr);
 }
 DISAS_INSN(and)
@@ -1794,11 +1834,11 @@ DISAS_INSN(and)
     reg = DREG(insn, 9);
     dest = gen_new_qreg(QMODE_I32);
     if (insn & 0x100) {
-        src = gen_ea(s, insn, OS_LONG, 0, &addr);
+        SRC_EA(src, OS_LONG, 0, &addr);
         gen_op_and32(dest, src, reg);
-        gen_ea(s, insn, OS_LONG, dest, &addr);
+        DEST_EA(insn, OS_LONG, dest, &addr);
     } else {
-        src = gen_ea(s, insn, OS_LONG, 0, NULL);
+        SRC_EA(src, OS_LONG, 0, NULL);
         gen_op_and32(dest, src, reg);
         gen_op_mov32(reg, dest);
     }
@@ -1810,7 +1850,7 @@ DISAS_INSN(adda)
     int src;
     int reg;
-    src = gen_ea(s, insn, OS_LONG, 0, NULL);
+    SRC_EA(src, OS_LONG, 0, NULL);
     reg = AREG(insn, 9);
     gen_op_add32(reg, reg, src);
 }
@@ -2114,7 +2154,7 @@ DISAS_INSN(fpu)
         default:
             goto undef;
         }
-        gen_ea(s, insn, opsize, res, NULL);
+        DEST_EA(insn, opsize, res, NULL);
         return;
     case 4: /* fmove to control register.  */
         switch ((ext >> 10) & 7) {
@@ -2141,7 +2181,7 @@ DISAS_INSN(fpu)
                       (ext >> 10) & 7);
             goto undef;
         }
-        gen_ea(s, insn, OS_LONG, res, NULL);
+        DEST_EA(insn, OS_LONG, res, NULL);
         break;
     case 6: /* fmovem */ 
     case 7:
@@ -2151,6 +2191,10 @@ DISAS_INSN(fpu)
         if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0)
             goto undef;
         src = gen_lea(s, insn, OS_LONG);
+        if (src == -1) {
+            gen_addr_fault(s);
+            return;
+        }
         addr = gen_new_qreg(QMODE_I32);
         gen_op_mov32(addr, src);
         mask = 0x80;
@@ -2186,7 +2230,7 @@ DISAS_INSN(fpu)
         default:
             goto undef;
         }
-        tmp = gen_ea(s, insn, opsize, -1, NULL);
+        SRC_EA(tmp, opsize, -1, NULL);
         if (opsize == OS_DOUBLE) {
             src = tmp;
         } else {
@@ -2846,6 +2890,7 @@ gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
             gen_opc_instr_start[lj] = 1;
         }
         last_cc_op = dc->cc_op;
+        dc->insn_pc = dc->pc;
 	disas_m68k_insn(env, dc);
     } while (!dc->is_jmp && gen_opc_ptr < gen_opc_end &&
              !env->singlestep_enabled &&