diff options
Diffstat (limited to 'disas')
| -rw-r--r-- | disas/i386.c | 146 |
1 files changed, 132 insertions, 14 deletions
diff --git a/disas/i386.c b/disas/i386.c index 044e02c..00ceca9 100644 --- a/disas/i386.c +++ b/disas/i386.c @@ -171,6 +171,7 @@ static void print_operand_value (char *buf, size_t bufsize, int hex, bfd_vma dis static void print_displacement (char *, bfd_vma); static void OP_E (int, int); static void OP_G (int, int); +static void OP_vvvv (int, int); static bfd_vma get64 (void); static bfd_signed_vma get32 (void); static bfd_signed_vma get32s (void); @@ -264,6 +265,9 @@ static int rex_used; current instruction. */ static int used_prefixes; +/* The VEX.vvvv register, unencoded. */ +static int vex_reg; + /* Flags stored in PREFIXES. */ #define PREFIX_REPZ 1 #define PREFIX_REPNZ 2 @@ -278,6 +282,10 @@ static int used_prefixes; #define PREFIX_ADDR 0x400 #define PREFIX_FWAIT 0x800 +#define PREFIX_VEX_0F 0x1000 +#define PREFIX_VEX_0F38 0x2000 +#define PREFIX_VEX_0F3A 0x4000 + /* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive) to ADDR (exclusive) are valid. Returns 1 for success, longjmps on error. */ @@ -323,6 +331,7 @@ fetch_data(struct disassemble_info *info, bfd_byte *addr) #define XX { NULL, 0 } +#define Bv { OP_vvvv, v_mode } #define Eb { OP_E, b_mode } #define Ev { OP_E, v_mode } #define Ed { OP_E, d_mode } @@ -671,7 +680,8 @@ fetch_data(struct disassemble_info *info, bfd_byte *addr) #define PREGRP102 NULL, { { NULL, USE_PREFIX_USER_TABLE }, { NULL, 102 } } #define PREGRP103 NULL, { { NULL, USE_PREFIX_USER_TABLE }, { NULL, 103 } } #define PREGRP104 NULL, { { NULL, USE_PREFIX_USER_TABLE }, { NULL, 104 } } - +#define PREGRP105 NULL, { { NULL, USE_PREFIX_USER_TABLE }, { NULL, 105 } } +#define PREGRP106 NULL, { { NULL, USE_PREFIX_USER_TABLE }, { NULL, 106 } } #define X86_64_0 NULL, { { NULL, X86_64_SPECIAL }, { NULL, 0 } } #define X86_64_1 NULL, { { NULL, X86_64_SPECIAL }, { NULL, 1 } } @@ -1449,7 +1459,7 @@ static const unsigned char threebyte_0x38_uses_DATA_prefix[256] = { /* c0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* cf */ /* d0 */ 0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1, /* df */ /* e0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ef */ - /* f0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ff */ + /* f0 */ 0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0, /* ff */ /* ------------------------------- */ /* 0 1 2 3 4 5 6 7 8 9 a b c d e f */ }; @@ -1473,7 +1483,7 @@ static const unsigned char threebyte_0x38_uses_REPNZ_prefix[256] = { /* c0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* cf */ /* d0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* df */ /* e0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ef */ - /* f0 */ 1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ff */ + /* f0 */ 1,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0, /* ff */ /* ------------------------------- */ /* 0 1 2 3 4 5 6 7 8 9 a b c d e f */ }; @@ -1497,7 +1507,7 @@ static const unsigned char threebyte_0x38_uses_REPZ_prefix[256] = { /* c0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* cf */ /* d0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* df */ /* e0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ef */ - /* f0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ff */ + /* f0 */ 0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0, /* ff */ /* ------------------------------- */ /* 0 1 2 3 4 5 6 7 8 9 a b c d e f */ }; @@ -2774,6 +2784,22 @@ static const struct dis386 prefix_user_table[][4] = { { "(bad)", { XX } }, }, + /* PREGRP105 */ + { + { "andnS", { Gv, Bv, Ev } }, + { "(bad)", { XX } }, + { "(bad)", { XX } }, + { "(bad)", { XX } }, + }, + + /* PREGRP106 */ + { + { "bextrS", { Gv, Ev, Bv } }, + { "sarxS", { Gv, Ev, Bv } }, + { "shlxS", { Gv, Ev, Bv } }, + { "shrxS", { Gv, Ev, Bv } }, + }, + }; static const struct dis386 x86_64_table[][2] = { @@ -3071,12 +3097,12 @@ static const struct dis386 three_byte_table[][256] = { /* f0 */ { PREGRP87 }, { PREGRP88 }, + { PREGRP105 }, { "(bad)", { XX } }, { "(bad)", { XX } }, { "(bad)", { XX } }, { "(bad)", { XX } }, - { "(bad)", { XX } }, - { "(bad)", { XX } }, + { PREGRP106 }, /* f8 */ { "(bad)", { XX } }, { "(bad)", { XX } }, @@ -3477,6 +3503,74 @@ ckprefix (void) } } +static void +ckvexprefix (void) +{ + int op, vex2, vex3, newrex = 0, newpfx = prefixes; + + if (address_mode == mode_16bit) { + return; + } + + fetch_data(the_info, codep + 1); + op = *codep; + + if (op != 0xc4 && op != 0xc5) { + return; + } + + fetch_data(the_info, codep + 2); + vex2 = codep[1]; + + if (address_mode == mode_32bit && (vex2 & 0xc0) != 0xc0) { + return; + } + + if (op == 0xc4) { + /* Three byte VEX prefix. */ + fetch_data(the_info, codep + 3); + vex3 = codep[2]; + + newrex |= (vex2 & 0x80 ? 0 : REX_R); + newrex |= (vex2 & 0x40 ? 0 : REX_X); + newrex |= (vex2 & 0x20 ? 0 : REX_B); + newrex |= (vex3 & 0x80 ? REX_W : 0); + switch (vex2 & 0x1f) { /* VEX.m-mmmm */ + case 1: + newpfx |= PREFIX_VEX_0F; + break; + case 2: + newpfx |= PREFIX_VEX_0F | PREFIX_VEX_0F38; + break; + case 3: + newpfx |= PREFIX_VEX_0F | PREFIX_VEX_0F3A; + break; + } + vex2 = vex3; + codep += 3; + } else { + /* Two byte VEX prefix. */ + newrex |= (vex2 & 0x80 ? 0 : REX_R); + codep += 2; + } + + vex_reg = (~vex2 >> 3) & 15; /* VEX.vvvv */ + switch (vex2 & 3) { /* VEX.pp */ + case 1: + newpfx |= PREFIX_DATA; /* 0x66 */ + break; + case 2: + newpfx |= PREFIX_REPZ; /* 0xf3 */ + break; + case 3: + newpfx |= PREFIX_REPNZ; /* 0xf2 */ + break; + } + + rex = newrex; + prefixes = newpfx; +} + /* Return the name of the prefix byte PREF, or NULL if PREF is not a prefix byte. */ @@ -3598,6 +3692,7 @@ print_insn (bfd_vma pc, disassemble_info *info) const char *p; struct dis_private priv; unsigned char op; + unsigned char threebyte; if (info->mach == bfd_mach_x86_64_intel_syntax || info->mach == bfd_mach_x86_64) @@ -3752,6 +3847,7 @@ print_insn (bfd_vma pc, disassemble_info *info) obufp = obuf; ckprefix (); + ckvexprefix (); insn_codep = codep; sizeflag = priv.orig_sizeflag; @@ -3775,18 +3871,29 @@ print_insn (bfd_vma pc, disassemble_info *info) } op = 0; + if (prefixes & PREFIX_VEX_0F) + { + used_prefixes |= PREFIX_VEX_0F | PREFIX_VEX_0F38 | PREFIX_VEX_0F3A; + if (prefixes & PREFIX_VEX_0F38) + threebyte = 0x38; + else if (prefixes & PREFIX_VEX_0F3A) + threebyte = 0x3a; + else + threebyte = *codep++; + goto vex_opcode; + } if (*codep == 0x0f) { - unsigned char threebyte; fetch_data(info, codep + 2); - threebyte = *++codep; + threebyte = codep[1]; + codep += 2; + vex_opcode: dp = &dis386_twobyte[threebyte]; - need_modrm = twobyte_has_modrm[*codep]; - uses_DATA_prefix = twobyte_uses_DATA_prefix[*codep]; - uses_REPNZ_prefix = twobyte_uses_REPNZ_prefix[*codep]; - uses_REPZ_prefix = twobyte_uses_REPZ_prefix[*codep]; - uses_LOCK_prefix = (*codep & ~0x02) == 0x20; - codep++; + need_modrm = twobyte_has_modrm[threebyte]; + uses_DATA_prefix = twobyte_uses_DATA_prefix[threebyte]; + uses_REPNZ_prefix = twobyte_uses_REPNZ_prefix[threebyte]; + uses_REPZ_prefix = twobyte_uses_REPZ_prefix[threebyte]; + uses_LOCK_prefix = (threebyte & ~0x02) == 0x20; if (dp->name == NULL && dp->op[0].bytemode == IS_3BYTE_OPCODE) { fetch_data(info, codep + 2); @@ -5291,6 +5398,17 @@ OP_G (int bytemode, int sizeflag) } } +static void +OP_vvvv (int bytemode, int sizeflags) +{ + USED_REX (REX_W); + if (rex & REX_W) { + oappend(names64[vex_reg]); + } else { + oappend(names32[vex_reg]); + } +} + static bfd_vma get64 (void) { |