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hvf: correctly handle REX prefix in relation to legacy prefixes

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In real x86 processors, the REX prefix must come after legacy prefixes.
REX before legacy is ignored.  Update the HVF emulation code to properly
handle this.  Fix some spelling errors in constants.  Fix some decoder
table initialization issues found by Coverity.

Signed-off-by: Cameron Esfahani <dirty@apple.com>
Message-Id: <eff30ded8307471936bec5d84c3b6efbc95e3211.1574625592.git.dirty@apple.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Cameron Esfahani 2019-11-24 12:05:25 -08:00 • committed by Paolo Bonzini
parent 9fedbbeeee
commit 8c3b0e9e67
2 changed files with 46 additions and 38 deletions
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20
target/i386/hvf/x86_decode.h
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@ -27,12 +27,12 @@ typedef enum x86_prefix {
PREFIX_REPN = 0xf2,
PREFIX_REP = 0xf3,
/* group 2 */
PREFIX_CS_SEG_OVEERIDE = 0x2e,
PREFIX_SS_SEG_OVEERIDE = 0x36,
PREFIX_DS_SEG_OVEERIDE = 0x3e,
PREFIX_ES_SEG_OVEERIDE = 0x26,
PREFIX_FS_SEG_OVEERIDE = 0x64,
PREFIX_GS_SEG_OVEERIDE = 0x65,
PREFIX_CS_SEG_OVERRIDE = 0x2e,
PREFIX_SS_SEG_OVERRIDE = 0x36,
PREFIX_DS_SEG_OVERRIDE = 0x3e,
PREFIX_ES_SEG_OVERRIDE = 0x26,
PREFIX_FS_SEG_OVERRIDE = 0x64,
PREFIX_GS_SEG_OVERRIDE = 0x65,
/* group 3 */
PREFIX_OP_SIZE_OVERRIDE = 0x66,
/* group 4 */
@ -303,10 +303,10 @@ uint64_t sign(uint64_t val, int size);
uint32_t decode_instruction(CPUX86State *env, struct x86_decode *decode);
target_ulong get_reg_ref(CPUX86State *env, int reg, int rex, int is_extended,
int size);
target_ulong get_reg_val(CPUX86State *env, int reg, int rex, int is_extended,
int size);
target_ulong get_reg_ref(CPUX86State *env, int reg, int rex_present,
int is_extended, int size);
target_ulong get_reg_val(CPUX86State *env, int reg, int rex_present,
int is_extended, int size);
void calc_modrm_operand(CPUX86State *env, struct x86_decode *decode,
struct x86_decode_op *op);
target_ulong decode_linear_addr(CPUX86State *env, struct x86_decode *decode,