From d835a58baae720abe909795cb68763040d1750a8 Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Thu, 9 Jan 2020 11:38:01 +0100 Subject: [PATCH] x86: SYSENTER/SYSEXIT are unavailable in 64-bit mode on AMD The disassembler change is such that in default mode we'd disassemble the insns (for there not ebing any conflicts), but when AMD64 mode was explicitly requested, we'd show them as "(bad)". --- gas/ChangeLog | 9 ++++++ gas/testsuite/gas/i386/i386.exp | 4 +++ gas/testsuite/gas/i386/x86-64-sysenter-amd.d | 14 ++++++++++ gas/testsuite/gas/i386/x86-64-sysenter-amd.l | 5 ++++ gas/testsuite/gas/i386/x86-64-sysenter-amd.s | 7 +++++ .../gas/i386/x86-64-sysenter-intel.d | 15 ++++++++++ .../gas/i386/x86-64-sysenter-mixed.d | 6 ++++ opcodes/ChangeLog | 11 ++++++++ opcodes/i386-dis.c | 26 +++++++++++++---- opcodes/i386-opc.tbl | 6 ++-- opcodes/i386-tbl.h | 28 +++++++++++++++++-- 11 files changed, 121 insertions(+), 10 deletions(-) create mode 100644 gas/testsuite/gas/i386/x86-64-sysenter-amd.d create mode 100644 gas/testsuite/gas/i386/x86-64-sysenter-amd.l create mode 100644 gas/testsuite/gas/i386/x86-64-sysenter-amd.s create mode 100644 gas/testsuite/gas/i386/x86-64-sysenter-intel.d create mode 100644 gas/testsuite/gas/i386/x86-64-sysenter-mixed.d diff --git a/gas/ChangeLog b/gas/ChangeLog index bed8292aff..116617a928 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,12 @@ +2020-01-09 Jan Beulich + + * testsuite/gas/i386/x86-64-sysenter-amd.s, + testsuite/gas/i386/x86-64-sysenter-amd.d, + testsuite/gas/i386/x86-64-sysenter-amd.l, + testsuite/gas/i386/x86-64-sysenter-intel.d, + testsuite/gas/i386/x86-64-sysenter-mixed.d: New. + * testsuite/gas/i386/i386.exp: Run new tests. + 2020-01-08 Nick Clifton PR 25284 diff --git a/gas/testsuite/gas/i386/i386.exp b/gas/testsuite/gas/i386/i386.exp index 6ee486f38a..4c886d56a1 100644 --- a/gas/testsuite/gas/i386/i386.exp +++ b/gas/testsuite/gas/i386/i386.exp @@ -724,6 +724,10 @@ if [expr ([istarget "i*86-*-*"] || [istarget "x86_64-*-*"]) && [gas_64_check]] t run_dump_test "x86-64-nops-5" run_dump_test "x86-64-nops-5-k8" run_dump_test "x86-64-nops-7" + run_dump_test "x86-64-sysenter-intel" + run_dump_test "x86-64-sysenter-mixed" + run_dump_test "x86-64-sysenter-amd" + run_list_test "x86-64-sysenter-amd" run_dump_test "noreg64" run_list_test "cvtsi2sX" run_dump_test "x86-64-sse4_1" diff --git a/gas/testsuite/gas/i386/x86-64-sysenter-amd.d b/gas/testsuite/gas/i386/x86-64-sysenter-amd.d new file mode 100644 index 0000000000..5b2fc37a64 --- /dev/null +++ b/gas/testsuite/gas/i386/x86-64-sysenter-amd.d @@ -0,0 +1,14 @@ +#as: -mintel64 +#objdump: -dw -Mamd64 +#name: x86-64 sysenter (Intel64/AMD64) + +.*: +file format .* + +Disassembly of section .text: + +0+ <.text>: +[ ]*[a-f0-9]+:[ ]+0f 34[ ]+\(bad\)[ ]* +[ ]*[a-f0-9]+:[ ]+0f 35[ ]+\(bad\)[ ]* +[ ]*[a-f0-9]+:[ ]+0f 34[ ]+\(bad\)[ ]* +[ ]*[a-f0-9]+:[ ]+0f 35[ ]+\(bad\)[ ]* +#pass diff --git a/gas/testsuite/gas/i386/x86-64-sysenter-amd.l b/gas/testsuite/gas/i386/x86-64-sysenter-amd.l new file mode 100644 index 0000000000..faa2562335 --- /dev/null +++ b/gas/testsuite/gas/i386/x86-64-sysenter-amd.l @@ -0,0 +1,5 @@ +.*: Assembler messages: +.*:2: Error: .* +.*:3: Error: .* +.*:6: Error: .* +.*:7: Error: .* diff --git a/gas/testsuite/gas/i386/x86-64-sysenter-amd.s b/gas/testsuite/gas/i386/x86-64-sysenter-amd.s new file mode 100644 index 0000000000..b6d31f99ce --- /dev/null +++ b/gas/testsuite/gas/i386/x86-64-sysenter-amd.s @@ -0,0 +1,7 @@ + .text + sysenter + sysexit + + .intel_syntax noprefix + sysenter + sysexit diff --git a/gas/testsuite/gas/i386/x86-64-sysenter-intel.d b/gas/testsuite/gas/i386/x86-64-sysenter-intel.d new file mode 100644 index 0000000000..ffd5e3e96a --- /dev/null +++ b/gas/testsuite/gas/i386/x86-64-sysenter-intel.d @@ -0,0 +1,15 @@ +#as: -mintel64 +#objdump: -dw -Mintel64 +#name: x86-64 sysenter (Intel64/Intel64) +#source: x86-64-sysenter-amd.s + +.*: +file format .* + +Disassembly of section .text: + +0+ <.text>: +[ ]*[a-f0-9]+: 0f 34 sysenter * +[ ]*[a-f0-9]+: 0f 35 sysexit * +[ ]*[a-f0-9]+: 0f 34 sysenter * +[ ]*[a-f0-9]+: 0f 35 sysexit * +#pass diff --git a/gas/testsuite/gas/i386/x86-64-sysenter-mixed.d b/gas/testsuite/gas/i386/x86-64-sysenter-mixed.d new file mode 100644 index 0000000000..034f1cbcbf --- /dev/null +++ b/gas/testsuite/gas/i386/x86-64-sysenter-mixed.d @@ -0,0 +1,6 @@ +#as: -mintel64 +#objdump: -dw +#name: x86-64 sysenter (Intel64/Default) +#source: x86-64-sysenter-amd.s +#dump: x86-64-sysenter-intel.d + diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog index 011943d55a..05f3640daa 100644 --- a/opcodes/ChangeLog +++ b/opcodes/ChangeLog @@ -1,3 +1,14 @@ +2020-01-09 Jan Beulich + + * i386-dis.c (SEP_Fixup): New. + (SEP): Define. + (dis386_twobyte): Use it for sysenter/sysexit. + (enum x86_64_isa): Change amd64 enumerator to value 1. + (OP_J): Compare isa64 against intel64 instead of amd64. + * i386-opc.tbl (sysenter, sysexit): Split into AMD64 and Intel64 + forms. + * i386-tbl.h: Re-generate. + 2020-01-08 Alan Modra * z8k-dis.c: Include libiberty.h diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c index ce27e0e0b8..5d24fb5cec 100644 --- a/opcodes/i386-dis.c +++ b/opcodes/i386-dis.c @@ -107,6 +107,7 @@ static void OP_3DNowSuffix (int, int); static void CMP_Fixup (int, int); static void BadOp (void); static void REP_Fixup (int, int); +static void SEP_Fixup (int, int); static void BND_Fixup (int, int); static void NOTRACK_Fixup (int, int); static void HLE_Fixup1 (int, int); @@ -412,6 +413,7 @@ fetch_data (struct disassemble_info *info, bfd_byte *addr) #define EMCq { OP_EMC, q_mode } #define MXC { OP_MXC, 0 } #define OPSUF { OP_3DNowSuffix, 0 } +#define SEP { SEP_Fixup, 0 } #define CMP { CMP_Fixup, 0 } #define XMM0 { XMM_Fixup, 0 } #define FXSAVE { FXSAVE_Fixup, 0 } @@ -2713,8 +2715,8 @@ static const struct dis386 dis386_twobyte[] = { { "rdtsc", { XX }, 0 }, { "rdmsr", { XX }, 0 }, { "rdpmc", { XX }, 0 }, - { "sysenter", { XX }, 0 }, - { "sysexit", { XX }, 0 }, + { "sysenter", { SEP }, 0 }, + { "sysexit", { SEP }, 0 }, { Bad_Opcode }, { "getsec", { XX }, 0 }, /* 38 */ @@ -11316,7 +11318,7 @@ static char scale_char; enum x86_64_isa { - amd64 = 0, + amd64 = 1, intel64 }; @@ -14829,12 +14831,12 @@ OP_J (int bytemode, int sizeflag) disp -= 0x100; break; case v_mode: - if (isa64 == amd64) + if (isa64 != intel64) case dqw_mode: USED_REX (REX_W); if ((sizeflag & DFLAG) || (address_mode == mode_64bit - && ((isa64 != amd64 && bytemode != dqw_mode) + && ((isa64 == intel64 && bytemode != dqw_mode) || (rex & REX_W)))) disp = get32s (); else @@ -14852,7 +14854,7 @@ OP_J (int bytemode, int sizeflag) & ~((bfd_vma) 0xffff)); } if (address_mode != mode_64bit - || (isa64 == amd64 && !(rex & REX_W))) + || (isa64 != intel64 && !(rex & REX_W))) used_prefixes |= (prefixes & PREFIX_DATA); break; default: @@ -15602,6 +15604,18 @@ REP_Fixup (int bytemode, int sizeflag) } } +static void +SEP_Fixup (int bytemode ATTRIBUTE_UNUSED, int sizeflag ATTRIBUTE_UNUSED) +{ + if ( isa64 != amd64 ) + return; + + obufp = obuf; + BadOp (); + mnemonicendp = obufp; + ++codep; +} + /* For BND-prefixed instructions 0xF2 prefix should be displayed as "bnd". */ diff --git a/opcodes/i386-opc.tbl b/opcodes/i386-opc.tbl index 07c5a64578..4b39c7a38e 100644 --- a/opcodes/i386-opc.tbl +++ b/opcodes/i386-opc.tbl @@ -904,8 +904,10 @@ rdmsr, 0, 0xf32, None, 2, Cpu586, No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldS cmpxchg8b, 1, 0xfc7, 0x1, 2, Cpu586, Modrm|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_ldSuf|IsLockable|NoRex64|HLEPrefixOk, { Qword|Unspecified|BaseIndex } // Pentium II/Pentium Pro extensions. -sysenter, 0, 0xf34, None, 2, Cpu686, No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { 0 } -sysexit, 0, 0xf35, None, 2, Cpu686, No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { 0 } +sysenter, 0, 0xf34, None, 2, Cpu686, Intel64|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { 0 } +sysenter, 0, 0xf34, None, 2, Cpu686|CpuNo64, AMD64|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { 0 } +sysexit, 0, 0xf35, None, 2, Cpu686, Intel64|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { 0 } +sysexit, 0, 0xf35, None, 2, Cpu686|CpuNo64, AMD64|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { 0 } fxsave, 1, 0xfae, 0x0, 2, CpuFXSR, Modrm|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_ldSuf, { Unspecified|BaseIndex } fxsave64, 1, 0xfae, 0x0, 2, CpuFXSR|Cpu64, Modrm|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf|Rex64, { Unspecified|BaseIndex } fxrstor, 1, 0xfae, 0x1, 2, CpuFXSR, Modrm|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_ldSuf, { Unspecified|BaseIndex } diff --git a/opcodes/i386-tbl.h b/opcodes/i386-tbl.h index 7af7a79f5a..0af5119f67 100644 --- a/opcodes/i386-tbl.h +++ b/opcodes/i386-tbl.h @@ -7805,7 +7805,19 @@ const insn_template i386_optab[] = 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }, + { { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0 } } } }, + { "sysenter", 0xf34, None, 2, 0, + { { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0 } }, + { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0 }, { { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } } } }, { "sysexit", 0xf35, None, 2, 0, @@ -7817,7 +7829,19 @@ const insn_template i386_optab[] = 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }, + { { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0 } } } }, + { "sysexit", 0xf35, None, 2, 0, + { { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0 } }, + { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0 }, { { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } } } }, { "fxsave", 0xfae, 0x0, 2, 1, -- 2.34.1