opcodes: blackfin: decode insns with invalid register as illegal
Sometimes the encoding in the opcode is a 4 bit field which defines a register number. However, register numbers are only 0-7, so make sure we call illegal for when the opcode register number is greater than 8. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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@ -1,3 +1,12 @@
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2010-09-22 Robin Getz <robin.getz@analog.com>
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* bfin-dis.c (IS_DREG, IS_PREG, IS_GENREG, IS_DAGREG): Reject
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register values greater than 8.
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(IS_RESERVEDREG, allreg, mostreg): New helpers.
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(decode_ProgCtrl_0): Call IS_DREG/IS_PREG as appropriate.
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(decode_PushPopReg_0): Call mostreg/allreg as appropriate.
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(decode_CC2dreg_0): Check valid CC register number.
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2010-09-22 Robin Getz <robin.getz@analog.com>
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2010-09-22 Robin Getz <robin.getz@analog.com>
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* bfin-dis.c (decode_pseudoDEBUG_0): Add space after DBG.
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* bfin-dis.c (decode_pseudoDEBUG_0): Add space after DBG.
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@ -436,13 +436,18 @@ static enum machine_registers decode_allregs[] =
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REG_LASTREG,
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REG_LASTREG,
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};
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};
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#define IS_DREG(g,r) ((g) == 0)
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#define IS_DREG(g,r) ((g) == 0 && (r) < 8)
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#define IS_PREG(g,r) ((g) == 1)
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#define IS_PREG(g,r) ((g) == 1 && (r) < 8)
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#define IS_AREG(g,r) ((g) == 4 && (r) >= 0 && (r) < 4)
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#define IS_AREG(g,r) ((g) == 4 && (r) >= 0 && (r) < 4)
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#define IS_GENREG(g,r) ((g) == 0 || (g) == 1 || IS_AREG (g, r))
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#define IS_GENREG(g,r) ((((g) == 0 || (g) == 1) && (r) < 8) || IS_AREG (g, r))
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#define IS_DAGREG(g,r) ((g) == 2 || (g) == 3)
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#define IS_DAGREG(g,r) (((g) == 2 || (g) == 3) && (r) < 8)
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#define IS_SYSREG(g,r) \
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#define IS_SYSREG(g,r) \
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(((g) == 4 && ((r) == 6 || (r) == 7)) || (g) == 6 || (g) == 7)
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(((g) == 4 && ((r) == 6 || (r) == 7)) || (g) == 6 || (g) == 7)
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#define IS_RESERVEDREG(g,r) \
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(((r) > 7) || ((g) == 4 && ((r) == 4 || (r) == 5)) || (g) == 5)
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#define allreg(r,g) (!IS_RESERVEDREG (g, r))
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#define mostreg(r,g) (!(IS_DREG (g, r) || IS_PREG (g, r) || IS_RESERVEDREG (g, r)))
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#define allregs(x,i) REGNAME (decode_allregs[((i) << 3) | x])
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#define allregs(x,i) REGNAME (decode_allregs[((i) << 3) | x])
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#define uimm16s4(x) fmtconst (c_uimm16s4, x, 0, outf)
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#define uimm16s4(x) fmtconst (c_uimm16s4, x, 0, outf)
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@ -773,35 +778,35 @@ decode_ProgCtrl_0 (TIword iw0, disassemble_info *outf)
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OUTS (outf, "SSYNC");
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OUTS (outf, "SSYNC");
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else if (prgfunc == 2 && poprnd == 5)
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else if (prgfunc == 2 && poprnd == 5)
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OUTS (outf, "EMUEXCPT");
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OUTS (outf, "EMUEXCPT");
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else if (prgfunc == 3)
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else if (prgfunc == 3 && IS_DREG (0, poprnd))
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{
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{
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OUTS (outf, "CLI ");
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OUTS (outf, "CLI ");
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OUTS (outf, dregs (poprnd));
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OUTS (outf, dregs (poprnd));
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}
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}
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else if (prgfunc == 4)
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else if (prgfunc == 4 && IS_DREG (0, poprnd))
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{
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{
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OUTS (outf, "STI ");
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OUTS (outf, "STI ");
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OUTS (outf, dregs (poprnd));
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OUTS (outf, dregs (poprnd));
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}
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}
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else if (prgfunc == 5)
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else if (prgfunc == 5 && IS_PREG (1, poprnd))
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{
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{
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OUTS (outf, "JUMP (");
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OUTS (outf, "JUMP (");
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OUTS (outf, pregs (poprnd));
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OUTS (outf, pregs (poprnd));
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OUTS (outf, ")");
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OUTS (outf, ")");
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}
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}
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else if (prgfunc == 6)
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else if (prgfunc == 6 && IS_PREG (1, poprnd))
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{
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{
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OUTS (outf, "CALL (");
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OUTS (outf, "CALL (");
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OUTS (outf, pregs (poprnd));
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OUTS (outf, pregs (poprnd));
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OUTS (outf, ")");
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OUTS (outf, ")");
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}
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}
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else if (prgfunc == 7)
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else if (prgfunc == 7 && IS_PREG (1, poprnd))
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{
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{
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OUTS (outf, "CALL (PC + ");
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OUTS (outf, "CALL (PC + ");
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OUTS (outf, pregs (poprnd));
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OUTS (outf, pregs (poprnd));
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OUTS (outf, ")");
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OUTS (outf, ")");
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}
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}
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else if (prgfunc == 8)
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else if (prgfunc == 8 && IS_PREG (1, poprnd))
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{
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{
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OUTS (outf, "JUMP (PC + ");
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OUTS (outf, "JUMP (PC + ");
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OUTS (outf, pregs (poprnd));
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OUTS (outf, pregs (poprnd));
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@ -817,7 +822,7 @@ decode_ProgCtrl_0 (TIword iw0, disassemble_info *outf)
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OUTS (outf, "EXCPT ");
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OUTS (outf, "EXCPT ");
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OUTS (outf, uimm4 (poprnd));
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OUTS (outf, uimm4 (poprnd));
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}
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}
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else if (prgfunc == 11)
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else if (prgfunc == 11 && IS_PREG (1, poprnd))
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{
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{
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OUTS (outf, "TESTSET (");
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OUTS (outf, "TESTSET (");
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OUTS (outf, pregs (poprnd));
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OUTS (outf, pregs (poprnd));
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@ -903,12 +908,12 @@ decode_PushPopReg_0 (TIword iw0, disassemble_info *outf)
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int grp = ((iw0 >> PushPopReg_grp_bits) & PushPopReg_grp_mask);
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int grp = ((iw0 >> PushPopReg_grp_bits) & PushPopReg_grp_mask);
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int reg = ((iw0 >> PushPopReg_reg_bits) & PushPopReg_reg_mask);
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int reg = ((iw0 >> PushPopReg_reg_bits) & PushPopReg_reg_mask);
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if (W == 0)
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if (W == 0 && mostreg (reg, grp))
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{
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{
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OUTS (outf, allregs (reg, grp));
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OUTS (outf, allregs (reg, grp));
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OUTS (outf, " = [SP++]");
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OUTS (outf, " = [SP++]");
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}
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}
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else if (W == 1)
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else if (W == 1 && allreg (reg, grp))
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{
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{
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OUTS (outf, "[--SP] = ");
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OUTS (outf, "[--SP] = ");
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OUTS (outf, allregs (reg, grp));
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OUTS (outf, allregs (reg, grp));
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@ -1203,7 +1208,7 @@ decode_CC2dreg_0 (TIword iw0, disassemble_info *outf)
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OUTS (outf, "CC = ");
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OUTS (outf, "CC = ");
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OUTS (outf, dregs (reg));
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OUTS (outf, dregs (reg));
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}
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}
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else if (op == 3)
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else if (op == 3 && reg == 0)
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OUTS (outf, "CC = !CC");
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OUTS (outf, "CC = !CC");
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else
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else
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return 0;
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return 0;
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