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disas/i386: Disassemble ANDN/SHLX/SHRX/SHAX
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson
parent
464a1441c1
commit
189f792dc5
146
disas/i386.c
146
disas/i386.c
@ -171,6 +171,7 @@ static void print_operand_value (char *buf, size_t bufsize, int hex, bfd_vma dis
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static void print_displacement (char *, bfd_vma);
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static void OP_E (int, int);
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static void OP_G (int, int);
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static void OP_vvvv (int, int);
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static bfd_vma get64 (void);
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static bfd_signed_vma get32 (void);
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static bfd_signed_vma get32s (void);
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@ -264,6 +265,9 @@ static int rex_used;
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current instruction. */
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static int used_prefixes;
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/* The VEX.vvvv register, unencoded. */
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static int vex_reg;
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/* Flags stored in PREFIXES. */
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#define PREFIX_REPZ 1
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#define PREFIX_REPNZ 2
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@ -278,6 +282,10 @@ static int used_prefixes;
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#define PREFIX_ADDR 0x400
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#define PREFIX_FWAIT 0x800
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#define PREFIX_VEX_0F 0x1000
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#define PREFIX_VEX_0F38 0x2000
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#define PREFIX_VEX_0F3A 0x4000
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/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
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to ADDR (exclusive) are valid. Returns 1 for success, longjmps
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on error. */
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@ -323,6 +331,7 @@ fetch_data(struct disassemble_info *info, bfd_byte *addr)
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#define XX { NULL, 0 }
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#define Bv { OP_vvvv, v_mode }
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#define Eb { OP_E, b_mode }
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#define Ev { OP_E, v_mode }
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#define Ed { OP_E, d_mode }
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@ -671,7 +680,8 @@ fetch_data(struct disassemble_info *info, bfd_byte *addr)
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#define PREGRP102 NULL, { { NULL, USE_PREFIX_USER_TABLE }, { NULL, 102 } }
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#define PREGRP103 NULL, { { NULL, USE_PREFIX_USER_TABLE }, { NULL, 103 } }
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#define PREGRP104 NULL, { { NULL, USE_PREFIX_USER_TABLE }, { NULL, 104 } }
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#define PREGRP105 NULL, { { NULL, USE_PREFIX_USER_TABLE }, { NULL, 105 } }
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#define PREGRP106 NULL, { { NULL, USE_PREFIX_USER_TABLE }, { NULL, 106 } }
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#define X86_64_0 NULL, { { NULL, X86_64_SPECIAL }, { NULL, 0 } }
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#define X86_64_1 NULL, { { NULL, X86_64_SPECIAL }, { NULL, 1 } }
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@ -1449,7 +1459,7 @@ static const unsigned char threebyte_0x38_uses_DATA_prefix[256] = {
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/* c0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* cf */
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/* d0 */ 0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1, /* df */
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/* e0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ef */
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/* f0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ff */
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/* f0 */ 0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0, /* ff */
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/* ------------------------------- */
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/* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
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};
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@ -1473,7 +1483,7 @@ static const unsigned char threebyte_0x38_uses_REPNZ_prefix[256] = {
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/* c0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* cf */
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/* d0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* df */
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/* e0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ef */
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/* f0 */ 1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ff */
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/* f0 */ 1,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0, /* ff */
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/* ------------------------------- */
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/* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
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};
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@ -1497,7 +1507,7 @@ static const unsigned char threebyte_0x38_uses_REPZ_prefix[256] = {
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/* c0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* cf */
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/* d0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* df */
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/* e0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ef */
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/* f0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ff */
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/* f0 */ 0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0, /* ff */
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/* ------------------------------- */
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/* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
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};
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@ -2774,6 +2784,22 @@ static const struct dis386 prefix_user_table[][4] = {
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{ "(bad)", { XX } },
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},
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/* PREGRP105 */
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{
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{ "andnS", { Gv, Bv, Ev } },
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{ "(bad)", { XX } },
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{ "(bad)", { XX } },
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{ "(bad)", { XX } },
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},
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/* PREGRP106 */
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{
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{ "bextrS", { Gv, Ev, Bv } },
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{ "sarxS", { Gv, Ev, Bv } },
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{ "shlxS", { Gv, Ev, Bv } },
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{ "shrxS", { Gv, Ev, Bv } },
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},
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};
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static const struct dis386 x86_64_table[][2] = {
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@ -3071,12 +3097,12 @@ static const struct dis386 three_byte_table[][256] = {
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/* f0 */
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{ PREGRP87 },
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{ PREGRP88 },
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{ PREGRP105 },
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{ "(bad)", { XX } },
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{ "(bad)", { XX } },
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{ "(bad)", { XX } },
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{ "(bad)", { XX } },
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{ "(bad)", { XX } },
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{ "(bad)", { XX } },
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{ PREGRP106 },
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/* f8 */
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{ "(bad)", { XX } },
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{ "(bad)", { XX } },
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@ -3477,6 +3503,74 @@ ckprefix (void)
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}
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}
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static void
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ckvexprefix (void)
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{
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int op, vex2, vex3, newrex = 0, newpfx = prefixes;
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if (address_mode == mode_16bit) {
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return;
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}
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fetch_data(the_info, codep + 1);
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op = *codep;
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if (op != 0xc4 && op != 0xc5) {
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return;
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}
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fetch_data(the_info, codep + 2);
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vex2 = codep[1];
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if (address_mode == mode_32bit && (vex2 & 0xc0) != 0xc0) {
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return;
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}
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if (op == 0xc4) {
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/* Three byte VEX prefix. */
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fetch_data(the_info, codep + 3);
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vex3 = codep[2];
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newrex |= (vex2 & 0x80 ? 0 : REX_R);
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newrex |= (vex2 & 0x40 ? 0 : REX_X);
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newrex |= (vex2 & 0x20 ? 0 : REX_B);
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newrex |= (vex3 & 0x80 ? REX_W : 0);
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switch (vex2 & 0x1f) { /* VEX.m-mmmm */
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case 1:
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newpfx |= PREFIX_VEX_0F;
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break;
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case 2:
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newpfx |= PREFIX_VEX_0F | PREFIX_VEX_0F38;
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break;
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case 3:
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newpfx |= PREFIX_VEX_0F | PREFIX_VEX_0F3A;
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break;
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}
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vex2 = vex3;
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codep += 3;
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} else {
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/* Two byte VEX prefix. */
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newrex |= (vex2 & 0x80 ? 0 : REX_R);
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codep += 2;
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}
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vex_reg = (~vex2 >> 3) & 15; /* VEX.vvvv */
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switch (vex2 & 3) { /* VEX.pp */
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case 1:
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newpfx |= PREFIX_DATA; /* 0x66 */
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break;
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case 2:
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newpfx |= PREFIX_REPZ; /* 0xf3 */
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break;
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case 3:
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newpfx |= PREFIX_REPNZ; /* 0xf2 */
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break;
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}
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rex = newrex;
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prefixes = newpfx;
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}
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/* Return the name of the prefix byte PREF, or NULL if PREF is not a
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prefix byte. */
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@ -3598,6 +3692,7 @@ print_insn (bfd_vma pc, disassemble_info *info)
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const char *p;
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struct dis_private priv;
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unsigned char op;
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unsigned char threebyte;
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if (info->mach == bfd_mach_x86_64_intel_syntax
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|| info->mach == bfd_mach_x86_64)
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@ -3752,6 +3847,7 @@ print_insn (bfd_vma pc, disassemble_info *info)
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obufp = obuf;
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ckprefix ();
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ckvexprefix ();
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insn_codep = codep;
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sizeflag = priv.orig_sizeflag;
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@ -3775,18 +3871,29 @@ print_insn (bfd_vma pc, disassemble_info *info)
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}
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op = 0;
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if (prefixes & PREFIX_VEX_0F)
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{
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used_prefixes |= PREFIX_VEX_0F | PREFIX_VEX_0F38 | PREFIX_VEX_0F3A;
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if (prefixes & PREFIX_VEX_0F38)
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threebyte = 0x38;
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else if (prefixes & PREFIX_VEX_0F3A)
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threebyte = 0x3a;
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else
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threebyte = *codep++;
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goto vex_opcode;
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}
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if (*codep == 0x0f)
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{
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unsigned char threebyte;
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fetch_data(info, codep + 2);
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threebyte = *++codep;
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threebyte = codep[1];
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codep += 2;
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vex_opcode:
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dp = &dis386_twobyte[threebyte];
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need_modrm = twobyte_has_modrm[*codep];
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uses_DATA_prefix = twobyte_uses_DATA_prefix[*codep];
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uses_REPNZ_prefix = twobyte_uses_REPNZ_prefix[*codep];
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uses_REPZ_prefix = twobyte_uses_REPZ_prefix[*codep];
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uses_LOCK_prefix = (*codep & ~0x02) == 0x20;
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codep++;
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need_modrm = twobyte_has_modrm[threebyte];
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uses_DATA_prefix = twobyte_uses_DATA_prefix[threebyte];
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uses_REPNZ_prefix = twobyte_uses_REPNZ_prefix[threebyte];
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uses_REPZ_prefix = twobyte_uses_REPZ_prefix[threebyte];
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uses_LOCK_prefix = (threebyte & ~0x02) == 0x20;
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if (dp->name == NULL && dp->op[0].bytemode == IS_3BYTE_OPCODE)
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{
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fetch_data(info, codep + 2);
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@ -5291,6 +5398,17 @@ OP_G (int bytemode, int sizeflag)
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}
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}
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static void
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OP_vvvv (int bytemode, int sizeflags)
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{
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USED_REX (REX_W);
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if (rex & REX_W) {
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oappend(names64[vex_reg]);
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} else {
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oappend(names32[vex_reg]);
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}
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}
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static bfd_vma
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get64 (void)
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{
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