xen-project/xen
1
0 Fork 1
mirror of https://github.com/xen-project/xen.git synced 2026-10-28 10:11:27 +01:00
Code Issues Activity

x86emul: use eflags definitions in x86-defns.h

Browse Source 
Basically this patch does 's/EFLG_/X86_EFLAGS_/g' and with indentation
fixed up. And remove the duplicates in x86_emualte.c.  This in turn
requires userspace test harness to include x86-defns.h. Also remove a
few duplicates in userspace harness program.

No functional change.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
This commit is contained in:
Wei Liu committed 2017-02-06 10:15:49 +00:00
1 parent 588a28187a
commit 7603eb256a
5 files changed
+160 -179
Download Patch File Download Diff File Expand all files Collapse all files

No files matched your search

tools/fuzz/x86_instruction_emulator/Makefile
+2 -2
View File
@@ -11,7 +11,7 @@ endif
x86_emulate/x86_emulate.c x86_emulate/x86_emulate.h:
[ -L x86_emulate ] || ln -sf $(XEN_ROOT)/xen/arch/x86/x86_emulate .
asm/x86-vendors.h:
asm/x86-vendors.h asm/x86-defns.h:
[ -L asm ] || ln -sf $(XEN_ROOT)/xen/include/asm-x86 asm
x86_emulate.c x86_emulate.h: %:
@@ -19,7 +19,7 @@ x86_emulate.c x86_emulate.h: %:
CFLAGS += $(CFLAGS_xeninclude) -D__XEN_TOOLS__ -I.
x86.h := asm/x86-vendors.h
x86.h := asm/x86-vendors.h asm/x86-defns.h
x86_emulate.h := x86_emulate.h x86_emulate/x86_emulate.h $(x86.h)
x86_emulate.o: x86_emulate.c x86_emulate/x86_emulate.c $(x86_emulate.h)
tools/tests/x86_emulator/Makefile
+2 -2
View File
@@ -43,12 +43,12 @@ install:
x86_emulate/x86_emulate.c x86_emulate/x86_emulate.h:
[ -L x86_emulate ] || ln -sf $(XEN_ROOT)/xen/arch/x86/x86_emulate .
asm/x86-vendors.h:
asm/x86-vendors.h asm/x86-defns.h:
[ -L asm ] || ln -sf $(XEN_ROOT)/xen/include/asm-x86 asm
HOSTCFLAGS += $(CFLAGS_xeninclude) -I.
x86.h := asm/x86-vendors.h
x86.h := asm/x86-vendors.h asm/x86-defns.h
x86_emulate.h := x86_emulate.h x86_emulate/x86_emulate.h $(x86.h)
x86_emulate.o: x86_emulate.c x86_emulate/x86_emulate.c $(x86_emulate.h)
tools/tests/x86_emulator/test_x86_emulator.c
-9
View File
@@ -23,15 +23,6 @@ static const struct {
#endif
};
/* EFLAGS bit definitions. */
#define EFLG_OF (1<<11)
#define EFLG_DF (1<<10)
#define EFLG_SF (1<<7)
#define EFLG_ZF (1<<6)
#define EFLG_AF (1<<4)
#define EFLG_PF (1<<2)
#define EFLG_CF (1<<0)
static unsigned int bytes_read;
static int read(
tools/tests/x86_emulator/x86_emulate.h
+1
View File
@@ -6,6 +6,7 @@
#include <string.h>
#include <xen/xen.h>
#include <asm/x86-defns.h>
#include <asm/x86-vendors.h>
#define BUG() abort()
xen/arch/x86/x86_emulate/x86_emulate.c
+155 -166
View File
@@ -447,26 +447,6 @@ typedef union {
#define CR4_FSGSBASE (1<<16)
#define CR4_OSXSAVE (1<<18)
/* EFLAGS bit definitions. */
#define EFLG_ID (1<<21)
#define EFLG_VIP (1<<20)
#define EFLG_VIF (1<<19)
#define EFLG_AC (1<<18)
#define EFLG_VM (1<<17)
#define EFLG_RF (1<<16)
#define EFLG_NT (1<<14)
#define EFLG_IOPL (3<<12)
#define EFLG_OF (1<<11)
#define EFLG_DF (1<<10)
#define EFLG_IF (1<<9)
#define EFLG_TF (1<<8)
#define EFLG_SF (1<<7)
#define EFLG_ZF (1<<6)
#define EFLG_AF (1<<4)
#define EFLG_PF (1<<2)
#define EFLG_MBS (1<<1)
#define EFLG_CF (1<<0)
/* Floating point status word definitions. */
#define FSW_ES (1U << 7)
@@ -521,14 +501,16 @@ typedef union {
* These EFLAGS bits are restored from saved value during emulation, and
* any changes are written back to the saved value after emulation.
*/
#define EFLAGS_MASK (EFLG_OF|EFLG_SF|EFLG_ZF|EFLG_AF|EFLG_PF|EFLG_CF)
#define EFLAGS_MASK (X86_EFLAGS_OF | X86_EFLAGS_SF | X86_EFLAGS_ZF | \
X86_EFLAGS_AF | X86_EFLAGS_PF | X86_EFLAGS_CF)
/*
* These EFLAGS bits are modifiable (by POPF and IRET), possibly subject
* to further CPL and IOPL constraints.
*/
#define EFLAGS_MODIFIABLE (EFLG_ID|EFLG_AC|EFLG_RF|EFLG_NT|EFLG_IOPL| \
EFLG_DF|EFLG_IF|EFLG_TF|EFLAGS_MASK)
#define EFLAGS_MODIFIABLE (X86_EFLAGS_ID | X86_EFLAGS_AC | X86_EFLAGS_RF | \
X86_EFLAGS_NT | X86_EFLAGS_IOPL | X86_EFLAGS_DF | \
X86_EFLAGS_IF | X86_EFLAGS_TF | EFLAGS_MASK)
/* Before executing instruction: restore necessary bits in EFLAGS. */
#define _PRE_EFLAGS(_sav, _msk, _tmp) \
@@ -761,7 +743,8 @@ do { \
} while (0)
#define register_address_adjust(reg, adj) \
_register_address_increment(reg, \
_regs._eflags & EFLG_DF ? -(adj) : (adj), \
_regs._eflags & X86_EFLAGS_DF ? \
-(adj) : (adj), \
ad_bytes)
#define sp_pre_dec(dec) ({ \
@@ -784,7 +767,7 @@ do { \
rc = ops->insn_fetch(x86_seg_cs, ip, NULL, 0, ctxt); \
if ( rc ) goto done; \
_regs.r(ip) = ip; \
singlestep = _regs._eflags & EFLG_TF; \
singlestep = _regs._eflags & X86_EFLAGS_TF; \
} while (0)
#define validate_far_branch(cs, ip) ({ \
@@ -801,7 +784,7 @@ do { \
#define commit_far_branch(cs, newip) ({ \
validate_far_branch(cs, newip); \
_regs.r(ip) = (newip); \
singlestep = _regs._eflags & EFLG_TF; \
singlestep = _regs._eflags & X86_EFLAGS_TF; \
ops->write_segment(x86_seg_cs, cs, ctxt); \
})
@@ -854,7 +837,7 @@ static int _get_fpu(
if ( type >= X86EMUL_FPU_ymm )
{
/* Should be unreachable if VEX decoding is working correctly. */
ASSERT((cr0 & CR0_PE) && !(ctxt->regs->_eflags & EFLG_VM));
ASSERT((cr0 & CR0_PE) && !(ctxt->regs->_eflags & X86_EFLAGS_VM));
}
if ( cr0 & CR0_EM )
{
@@ -946,7 +929,8 @@ do { \
: [eflags] "+g" (_regs._eflags), \
[tmp] "=&r" (tmp_), "+m" (fic) \
: [func] "rm" (stub.func), \
[mask] "i" (EFLG_ZF|EFLG_PF|EFLG_CF) ); \
[mask] "i" (X86_EFLAGS_ZF|X86_EFLAGS_PF| \
X86_EFLAGS_CF) ); \
put_stub(stub); \
} while (0)
@@ -988,7 +972,7 @@ static inline void put_loop_count(
} \
goto complete_insn; \
} \
if ( max_reps > 1 && (_regs._eflags & EFLG_TF) && \
if ( max_reps > 1 && (_regs._eflags & X86_EFLAGS_TF) && \
!is_branch_step(ctxt, ops) ) \
max_reps = 1; \
max_reps; \
@@ -1022,7 +1006,7 @@ static void __put_rep_prefix(
/* Clip maximum repetitions so that the index register at most just wraps. */
#define truncate_ea_and_reps(ea, reps, bytes_per_rep) ({ \
unsigned long todo__, ea__ = truncate_word(ea, ad_bytes); \
if ( !(_regs._eflags & EFLG_DF) ) \
if ( !(_regs._eflags & X86_EFLAGS_DF) ) \
todo__ = truncate_word(-(ea), ad_bytes) / (bytes_per_rep); \
else if ( truncate_word((ea) + (bytes_per_rep) - 1, ad_bytes) < ea__ )\
todo__ = 1; \
@@ -1143,28 +1127,28 @@ test_cc(
switch ( (condition & 15) >> 1 )
{
case 0: /* o */
rc |= (flags & EFLG_OF);
rc |= (flags & X86_EFLAGS_OF);
break;
case 1: /* b/c/nae */
rc |= (flags & EFLG_CF);
rc |= (flags & X86_EFLAGS_CF);
break;
case 2: /* z/e */
rc |= (flags & EFLG_ZF);
rc |= (flags & X86_EFLAGS_ZF);
break;
case 3: /* be/na */
rc |= (flags & (EFLG_CF|EFLG_ZF));
rc |= (flags & (X86_EFLAGS_CF | X86_EFLAGS_ZF));
break;
case 4: /* s */
rc |= (flags & EFLG_SF);
rc |= (flags & X86_EFLAGS_SF);
break;
case 5: /* p/pe */
rc |= (flags & EFLG_PF);
rc |= (flags & X86_EFLAGS_PF);
break;
case 7: /* le/ng */
rc |= (flags & EFLG_ZF);
rc |= (flags & X86_EFLAGS_ZF);
/* fall through */
case 6: /* l/nge */
rc |= (!(flags & EFLG_SF) != !(flags & EFLG_OF));
rc |= (!(flags & X86_EFLAGS_SF) != !(flags & X86_EFLAGS_OF));
break;
}
@@ -1179,7 +1163,7 @@ get_cpl(
{
struct segment_register reg;
if ( ctxt->regs->_eflags & EFLG_VM )
if ( ctxt->regs->_eflags & X86_EFLAGS_VM )
return 3;
if ( (ops->read_segment == NULL) ||
@@ -1197,7 +1181,7 @@ _mode_iopl(
int cpl = get_cpl(ctxt, ops);
if ( cpl == -1 )
return -1;
return cpl <= MASK_EXTR(ctxt->regs->_eflags, EFLG_IOPL);
return cpl <= MASK_EXTR(ctxt->regs->_eflags, X86_EFLAGS_IOPL);
}
#define mode_ring0() ({ \
@@ -1217,7 +1201,7 @@ _mode_iopl(
rc = ops->read_cr(4, &cr4, ctxt); \
if ( rc != X86EMUL_OKAY ) goto done; \
} \
!!(cr4 & (_regs._eflags & EFLG_VM ? CR4_VME : CR4_PVI)); \
!!(cr4 & (_regs._eflags & X86_EFLAGS_VM ? CR4_VME : CR4_PVI)); \
})
static int ioport_access_check(
@@ -1230,7 +1214,7 @@ static int ioport_access_check(
struct segment_register tr;
int rc = X86EMUL_OKAY;
if ( !(ctxt->regs->_eflags & EFLG_VM) && mode_iopl() )
if ( !(ctxt->regs->_eflags & X86_EFLAGS_VM) && mode_iopl() )
return X86EMUL_OKAY;
fail_if(ops->read_segment == NULL);
@@ -1299,7 +1283,7 @@ in_protmode(
struct x86_emulate_ctxt *ctxt,
const struct x86_emulate_ops *ops)
{
return !(in_realmode(ctxt, ops) || (ctxt->regs->_eflags & EFLG_VM));
return !(in_realmode(ctxt, ops) || (ctxt->regs->_eflags & X86_EFLAGS_VM));
}
#define EAX 0
@@ -1822,8 +1806,8 @@ static int inject_swint(enum x86_swint_type type,
* a 32bit OS. Someone with many TUITs can see about reading the
* TSS Software Interrupt Redirection bitmap.
*/
if ( (ctxt->regs->_eflags & EFLG_VM) &&
((ctxt->regs->_eflags & EFLG_IOPL) != EFLG_IOPL) )
if ( (ctxt->regs->_eflags & X86_EFLAGS_VM) &&
((ctxt->regs->_eflags & X86_EFLAGS_IOPL) != X86_EFLAGS_IOPL) )
goto raise_exn;
/*
@@ -2313,7 +2297,7 @@ x86_decode(
default:
BUG(); /* Shouldn't be possible. */
case 2:
if ( state->regs->_eflags & EFLG_VM )
if ( state->regs->_eflags & X86_EFLAGS_VM )
break;
/* fall through */
case 4:
@@ -2676,7 +2660,8 @@ x86_emulate(
struct x86_emulate_state state;
int rc;
uint8_t b, d;
bool singlestep = (_regs._eflags & EFLG_TF) && !is_branch_step(ctxt, ops);
bool singlestep = (_regs._eflags & X86_EFLAGS_TF) &&
!is_branch_step(ctxt, ops);
struct operand src = { .reg = PTR_POISON };
struct operand dst = { .reg = PTR_POISON };
enum x86_swint_type swint_type;
@@ -2954,33 +2939,34 @@ x86_emulate(
uint8_t al = _regs.al;
unsigned int eflags = _regs._eflags;
_regs._eflags &= ~(EFLG_CF|EFLG_AF|EFLG_SF|EFLG_ZF|EFLG_PF);
if ( ((al & 0x0f) > 9) || (eflags & EFLG_AF) )
_regs._eflags &= ~(X86_EFLAGS_CF | X86_EFLAGS_AF | X86_EFLAGS_SF |
X86_EFLAGS_ZF | X86_EFLAGS_PF);
if ( ((al & 0x0f) > 9) || (eflags & X86_EFLAGS_AF) )
{
_regs._eflags |= EFLG_AF;
if ( b == 0x2f && (al < 6 || (eflags & EFLG_CF)) )
_regs._eflags |= EFLG_CF;
_regs._eflags |= X86_EFLAGS_AF;
if ( b == 0x2f && (al < 6 || (eflags & X86_EFLAGS_CF)) )
_regs._eflags |= X86_EFLAGS_CF;
_regs.al += (b == 0x27) ? 6 : -6;
}
if ( (al > 0x99) || (eflags & EFLG_CF) )
if ( (al > 0x99) || (eflags & X86_EFLAGS_CF) )
{
_regs.al += (b == 0x27) ? 0x60 : -0x60;
_regs._eflags |= EFLG_CF;
_regs._eflags |= X86_EFLAGS_CF;
}
_regs._eflags |= !_regs.al ? EFLG_ZF : 0;
_regs._eflags |= ((int8_t)_regs.al < 0) ? EFLG_SF : 0;
_regs._eflags |= even_parity(_regs.al) ? EFLG_PF : 0;
_regs._eflags |= !_regs.al ? X86_EFLAGS_ZF : 0;
_regs._eflags |= ((int8_t)_regs.al < 0) ? X86_EFLAGS_SF : 0;
_regs._eflags |= even_parity(_regs.al) ? X86_EFLAGS_PF : 0;
break;
}
case 0x37: /* aaa */
case 0x3f: /* aas */
_regs._eflags &= ~EFLG_CF;
if ( (_regs.al > 9) || (_regs._eflags & EFLG_AF) )
_regs._eflags &= ~X86_EFLAGS_CF;
if ( (_regs.al > 9) || (_regs._eflags & X86_EFLAGS_AF) )
{
_regs.al += (b == 0x37) ? 6 : -6;
_regs.ah += (b == 0x37) ? 1 : -1;
_regs._eflags |= EFLG_CF | EFLG_AF;
_regs._eflags |= X86_EFLAGS_CF | X86_EFLAGS_AF;
}
_regs.al &= 0x0f;
break;
@@ -3086,12 +3072,12 @@ x86_emulate(
goto done;
if ( src_rpl > (dst.val & 3) )
{
_regs._eflags |= EFLG_ZF;
_regs._eflags |= X86_EFLAGS_ZF;
dst.val = (dst.val & ~3) | src_rpl;
}
else
{
_regs._eflags &= ~EFLG_ZF;
_regs._eflags &= ~X86_EFLAGS_ZF;
dst.type = OP_NONE;
}
generate_exception_if(!in_protmode(ctxt, ops), EXC_UD);
@@ -3354,7 +3340,7 @@ x86_emulate(
goto done;
_regs.r(ip) = imm1;
singlestep = _regs._eflags & EFLG_TF;
singlestep = _regs._eflags & X86_EFLAGS_TF;
break;
case 0x9b: /* wait/fwait */
@@ -3366,8 +3352,8 @@ x86_emulate(
break;
case 0x9c: /* pushf */
if ( (_regs._eflags & EFLG_VM) &&
MASK_EXTR(_regs._eflags, EFLG_IOPL) != 3 )
if ( (_regs._eflags & X86_EFLAGS_VM) &&
MASK_EXTR(_regs._eflags, X86_EFLAGS_IOPL) != 3 )
{
cr4 = 0;
if ( op_bytes == 2 && ops->read_cr )
@@ -3377,21 +3363,21 @@ x86_emulate(
goto done;
}
generate_exception_if(!(cr4 & CR4_VME), EXC_GP, 0);
src.val = (_regs.flags & ~EFLG_IF) | EFLG_IOPL;
if ( _regs._eflags & EFLG_VIF )
src.val |= EFLG_IF;
src.val = (_regs.flags & ~X86_EFLAGS_IF) | X86_EFLAGS_IOPL;
if ( _regs._eflags & X86_EFLAGS_VIF )
src.val |= X86_EFLAGS_IF;
}
else
src.val = _regs.r(flags) & ~(EFLG_VM | EFLG_RF);
src.val = _regs.r(flags) & ~(X86_EFLAGS_VM | X86_EFLAGS_RF);
goto push;
case 0x9d: /* popf */ {
uint32_t mask = EFLG_VIP | EFLG_VIF | EFLG_VM;
uint32_t mask = X86_EFLAGS_VIP | X86_EFLAGS_VIF | X86_EFLAGS_VM;
cr4 = 0;
if ( !mode_ring0() )
{
if ( _regs._eflags & EFLG_VM )
if ( _regs._eflags & X86_EFLAGS_VM )
{
if ( op_bytes == 2 && ops->read_cr )
{
@@ -3400,12 +3386,12 @@ x86_emulate(
goto done;
}
generate_exception_if(!(cr4 & CR4_VME) &&
MASK_EXTR(_regs._eflags, EFLG_IOPL) != 3,
MASK_EXTR(_regs._eflags, X86_EFLAGS_IOPL) != 3,
EXC_GP, 0);
}
mask |= EFLG_IOPL;
mask |= X86_EFLAGS_IOPL;
if ( !mode_iopl() )
mask |= EFLG_IF;
mask |= X86_EFLAGS_IF;
}
/* 64-bit mode: POP defaults to a 64-bit operand. */
if ( mode_64bit() && (op_bytes == 4) )
@@ -3418,32 +3404,33 @@ x86_emulate(
dst.val = (uint16_t)dst.val | (_regs._eflags & 0xffff0000u);
if ( cr4 & CR4_VME )
{
if ( dst.val & EFLG_IF )
if ( dst.val & X86_EFLAGS_IF )
{
generate_exception_if(_regs._eflags & EFLG_VIP, EXC_GP, 0);
dst.val |= EFLG_VIF;
generate_exception_if(_regs._eflags & X86_EFLAGS_VIP,
EXC_GP, 0);
dst.val |= X86_EFLAGS_VIF;
}
else
dst.val &= ~EFLG_VIF;
mask &= ~EFLG_VIF;
dst.val &= ~X86_EFLAGS_VIF;
mask &= ~X86_EFLAGS_VIF;
}
}
dst.val &= EFLAGS_MODIFIABLE;
_regs._eflags &= mask;
_regs._eflags |= (dst.val & ~mask) | EFLG_MBS;
_regs._eflags |= (dst.val & ~mask) | X86_EFLAGS_MBS;
break;
}
case 0x9e: /* sahf */
if ( mode_64bit() )
vcpu_must_have(lahf_lm);
*(uint8_t *)&_regs._eflags = (_regs.ah & EFLAGS_MASK) | EFLG_MBS;
*(uint8_t *)&_regs._eflags = (_regs.ah & EFLAGS_MASK) | X86_EFLAGS_MBS;
break;
case 0x9f: /* lahf */
if ( mode_64bit() )
vcpu_must_have(lahf_lm);
_regs.ah = (_regs._eflags & EFLAGS_MASK) | EFLG_MBS;
_regs.ah = (_regs._eflags & EFLAGS_MASK) | X86_EFLAGS_MBS;
break;
case 0xa4 ... 0xa5: /* movs */ {
@@ -3487,8 +3474,8 @@ x86_emulate(
put_rep_prefix(1);
/* cmp: dst - src ==> src=*%%edi,dst=*%%esi ==> *%%esi - *%%edi */
emulate_2op_SrcV("cmp", src, dst, _regs._eflags);
if ( (repe_prefix() && !(_regs._eflags & EFLG_ZF)) ||
(repne_prefix() && (_regs._eflags & EFLG_ZF)) )
if ( (repe_prefix() && !(_regs._eflags & X86_EFLAGS_ZF)) ||
(repne_prefix() && (_regs._eflags & X86_EFLAGS_ZF)) )
_regs.r(ip) = next_eip;
break;
}
@@ -3537,8 +3524,8 @@ x86_emulate(
/* cmp: %%eax - *%%edi ==> src=%%eax,dst=*%%edi ==> src - dst */
dst.bytes = src.bytes;
emulate_2op_SrcV("cmp", dst, src, _regs._eflags);
if ( (repe_prefix() && !(_regs._eflags & EFLG_ZF)) ||
(repne_prefix() && (_regs._eflags & EFLG_ZF)) )
if ( (repe_prefix() && !(_regs._eflags & X86_EFLAGS_ZF)) ||
(repne_prefix() && (_regs._eflags & X86_EFLAGS_ZF)) )
_regs.r(ip) = next_eip;
break;
}
@@ -3683,7 +3670,7 @@ x86_emulate(
goto done;
case 0xce: /* into */
if ( !(_regs._eflags & EFLG_OF) )
if ( !(_regs._eflags & X86_EFLAGS_OF) )
break;
src.val = EXC_OF;
swint_type = x86_swint_into;
@@ -3691,7 +3678,7 @@ x86_emulate(
case 0xcf: /* iret */ {
unsigned long sel, eip, eflags;
uint32_t mask = EFLG_VIP | EFLG_VIF | EFLG_VM;
uint32_t mask = X86_EFLAGS_VIP | X86_EFLAGS_VIF | X86_EFLAGS_VM;
fail_if(!in_realmode(ctxt, ops));
if ( (rc = read_ulong(x86_seg_ss, sp_post_inc(op_bytes),
@@ -3705,7 +3692,7 @@ x86_emulate(
eflags = (uint16_t)eflags | (_regs._eflags & 0xffff0000u);
eflags &= EFLAGS_MODIFIABLE;
_regs._eflags &= mask;
_regs._eflags |= (eflags & ~mask) | EFLG_MBS;
_regs._eflags |= (eflags & ~mask) | X86_EFLAGS_MBS;
if ( (rc = load_seg(x86_seg_cs, sel, 1, &cs, ctxt, ops)) ||
(rc = commit_far_branch(&cs, (uint32_t)eip)) )
goto done;
@@ -3737,15 +3724,15 @@ x86_emulate(
generate_exception_if(!base, EXC_DE);
_regs.ax = ((al / base) << 8) | (al % base);
}
_regs._eflags &= ~(EFLG_SF|EFLG_ZF|EFLG_PF);
_regs._eflags |= !_regs.al ? EFLG_ZF : 0;
_regs._eflags |= ((int8_t)_regs.al < 0) ? EFLG_SF : 0;
_regs._eflags |= even_parity(_regs.al) ? EFLG_PF : 0;
_regs._eflags &= ~(X86_EFLAGS_SF | X86_EFLAGS_ZF | X86_EFLAGS_PF);
_regs._eflags |= !_regs.al ? X86_EFLAGS_ZF : 0;
_regs._eflags |= ((int8_t)_regs.al < 0) ? X86_EFLAGS_SF : 0;
_regs._eflags |= even_parity(_regs.al) ? X86_EFLAGS_PF : 0;
break;
}
case 0xd6: /* salc */
_regs.al = (_regs._eflags & EFLG_CF) ? 0xff : 0x00;
_regs.al = (_regs._eflags & X86_EFLAGS_CF) ? 0xff : 0x00;
break;
case 0xd7: /* xlat */ {
@@ -4263,7 +4250,7 @@ x86_emulate(
case 0xe0 ... 0xe2: /* loop{,z,nz} */ {
unsigned long count = get_loop_count(&_regs, ad_bytes);
int do_jmp = !(_regs._eflags & EFLG_ZF); /* loopnz */
int do_jmp = !(_regs._eflags & X86_EFLAGS_ZF); /* loopnz */
if ( b == 0xe1 )
do_jmp = !do_jmp; /* loopz */
@@ -4351,7 +4338,7 @@ x86_emulate(
break;
case 0xf5: /* cmc */
_regs._eflags ^= EFLG_CF;
_regs._eflags ^= X86_EFLAGS_CF;
break;
case 0xf6 ... 0xf7: /* Grp3 */
@@ -4371,21 +4358,21 @@ x86_emulate(
emulate_1op("neg", dst, _regs._eflags);
break;
case 4: /* mul */
_regs._eflags &= ~(EFLG_OF|EFLG_CF);
_regs._eflags &= ~(X86_EFLAGS_OF | X86_EFLAGS_CF);
switch ( dst.bytes )
{
case 1:
dst.val = _regs.al;
dst.val *= src.val;
if ( (uint8_t)dst.val != (uint16_t)dst.val )
_regs._eflags |= EFLG_OF|EFLG_CF;
_regs._eflags |= X86_EFLAGS_OF | X86_EFLAGS_CF;
dst.bytes = 2;
break;
case 2:
dst.val = _regs.ax;
dst.val *= src.val;
if ( (uint16_t)dst.val != (uint32_t)dst.val )
_regs._eflags |= EFLG_OF|EFLG_CF;
_regs._eflags |= X86_EFLAGS_OF | X86_EFLAGS_CF;
_regs.dx = dst.val >> 16;
break;
#ifdef __x86_64__
@@ -4393,7 +4380,7 @@ x86_emulate(
dst.val = _regs._eax;
dst.val *= src.val;
if ( (uint32_t)dst.val != dst.val )
_regs._eflags |= EFLG_OF|EFLG_CF;
_regs._eflags |= X86_EFLAGS_OF | X86_EFLAGS_CF;
_regs.rdx = dst.val >> 32;
break;
#endif
@@ -4401,7 +4388,7 @@ x86_emulate(
u[0] = src.val;
u[1] = _regs.r(ax);
if ( mul_dbl(u) )
_regs._eflags |= EFLG_OF|EFLG_CF;
_regs._eflags |= X86_EFLAGS_OF | X86_EFLAGS_CF;
_regs.r(dx) = u[1];
dst.val = u[0];
break;
@@ -4409,13 +4396,13 @@ x86_emulate(
break;
case 5: /* imul */
imul:
_regs._eflags &= ~(EFLG_OF|EFLG_CF);
_regs._eflags &= ~(X86_EFLAGS_OF | X86_EFLAGS_CF);
switch ( dst.bytes )
{
case 1:
dst.val = (int8_t)src.val * (int8_t)_regs.al;
if ( (int8_t)dst.val != (int16_t)dst.val )
_regs._eflags |= EFLG_OF|EFLG_CF;
_regs._eflags |= X86_EFLAGS_OF | X86_EFLAGS_CF;
ASSERT(b > 0x6b);
dst.bytes = 2;
break;
@@ -4423,7 +4410,7 @@ x86_emulate(
dst.val = ((uint32_t)(int16_t)src.val *
(uint32_t)(int16_t)_regs.ax);
if ( (int16_t)dst.val != (int32_t)dst.val )
_regs._eflags |= EFLG_OF|EFLG_CF;
_regs._eflags |= X86_EFLAGS_OF | X86_EFLAGS_CF;
if ( b > 0x6b )
_regs.dx = dst.val >> 16;
break;
@@ -4432,7 +4419,7 @@ x86_emulate(
dst.val = ((uint64_t)(int32_t)src.val *
(uint64_t)(int32_t)_regs._eax);
if ( (int32_t)dst.val != dst.val )
_regs._eflags |= EFLG_OF|EFLG_CF;
_regs._eflags |= X86_EFLAGS_OF | X86_EFLAGS_CF;
if ( b > 0x6b )
_regs.rdx = dst.val >> 32;
break;
@@ -4441,7 +4428,7 @@ x86_emulate(
u[0] = src.val;
u[1] = _regs.r(ax);
if ( imul_dbl(u) )
_regs._eflags |= EFLG_OF|EFLG_CF;
_regs._eflags |= X86_EFLAGS_OF | X86_EFLAGS_CF;
if ( b > 0x6b )
_regs.r(dx) = u[1];
dst.val = u[0];
@@ -4542,46 +4529,47 @@ x86_emulate(
break;
case 0xf8: /* clc */
_regs._eflags &= ~EFLG_CF;
_regs._eflags &= ~X86_EFLAGS_CF;
break;
case 0xf9: /* stc */
_regs._eflags |= EFLG_CF;
_regs._eflags |= X86_EFLAGS_CF;
break;
case 0xfa: /* cli */
if ( mode_iopl() )
_regs._eflags &= ~EFLG_IF;
_regs._eflags &= ~X86_EFLAGS_IF;
else
{
generate_exception_if(!mode_vif(), EXC_GP, 0);
_regs._eflags &= ~EFLG_VIF;
_regs._eflags &= ~X86_EFLAGS_VIF;
}
break;
case 0xfb: /* sti */
if ( mode_iopl() )
{
if ( !(_regs._eflags & EFLG_IF) )
if ( !(_regs._eflags & X86_EFLAGS_IF) )
ctxt->retire.sti = true;
_regs._eflags |= EFLG_IF;
_regs._eflags |= X86_EFLAGS_IF;
}
else
{
generate_exception_if((_regs._eflags & EFLG_VIP) || !mode_vif(),
generate_exception_if((_regs._eflags & X86_EFLAGS_VIP) ||
!mode_vif(),
EXC_GP, 0);
if ( !(_regs._eflags & EFLG_VIF) )
if ( !(_regs._eflags & X86_EFLAGS_VIF) )
ctxt->retire.sti = true;
_regs._eflags |= EFLG_VIF;
_regs._eflags |= X86_EFLAGS_VIF;
}
break;
case 0xfc: /* cld */
_regs._eflags &= ~EFLG_DF;
_regs._eflags &= ~X86_EFLAGS_DF;
break;
case 0xfd: /* std */
_regs._eflags |= EFLG_DF;
_regs._eflags |= X86_EFLAGS_DF;
break;
case 0xfe: /* Grp4 */
@@ -4643,7 +4631,7 @@ x86_emulate(
goto done;
break;
case 4: /* verr / verw */
_regs._eflags &= ~EFLG_ZF;
_regs._eflags &= ~X86_EFLAGS_ZF;
switch ( rc = protmode_load_seg(x86_seg_none, src.val, false,
&sreg, ctxt, ops) )
{
@@ -4651,7 +4639,7 @@ x86_emulate(
if ( sreg.attr.fields.s &&
((modrm_reg & 1) ? ((sreg.attr.fields.type & 0xa) == 0x2)
: ((sreg.attr.fields.type & 0xa) != 0x8)) )
_regs._eflags |= EFLG_ZF;
_regs._eflags |= X86_EFLAGS_ZF;
break;
case X86EMUL_EXCEPTION:
if ( ctxt->event_pending )
@@ -4681,9 +4669,9 @@ x86_emulate(
vcpu_must_have(smap);
generate_exception_if(vex.pfx || !mode_ring0(), EXC_UD);
_regs._eflags &= ~EFLG_AC;
_regs._eflags &= ~X86_EFLAGS_AC;
if ( modrm == 0xcb )
_regs._eflags |= EFLG_AC;
_regs._eflags |= X86_EFLAGS_AC;
goto complete_insn;
#ifdef __XEN__
@@ -4717,7 +4705,7 @@ x86_emulate(
generate_exception_if(!vcpu_has_rtm() && !vcpu_has_hle(),
EXC_UD);
/* Neither HLE nor RTM can be active when we get here. */
_regs._eflags |= EFLG_ZF;
_regs._eflags |= X86_EFLAGS_ZF;
goto complete_insn;
case 0xdf: /* invlpga */
@@ -4868,7 +4856,7 @@ x86_emulate(
case X86EMUL_OPC(0x0f, 0x02): /* lar */
generate_exception_if(!in_protmode(ctxt, ops), EXC_UD);
_regs._eflags &= ~EFLG_ZF;
_regs._eflags &= ~X86_EFLAGS_ZF;
switch ( rc = protmode_load_seg(x86_seg_none, src.val, false, &sreg,
ctxt, ops) )
{
@@ -4888,12 +4876,12 @@ x86_emulate(
case 0x09: /* available 32/64-bit TSS */
case 0x0b: /* busy 32/64-bit TSS */
case 0x0c: /* 32/64-bit call gate */
_regs._eflags |= EFLG_ZF;
_regs._eflags |= X86_EFLAGS_ZF;
break;
}
}
else
_regs._eflags |= EFLG_ZF;
_regs._eflags |= X86_EFLAGS_ZF;
break;
case X86EMUL_EXCEPTION:
if ( ctxt->event_pending )
@@ -4906,7 +4894,7 @@ x86_emulate(
rc = X86EMUL_OKAY;
break;
}
if ( _regs._eflags & EFLG_ZF )
if ( _regs._eflags & X86_EFLAGS_ZF )
dst.val = ((sreg.attr.bytes & 0xff) << 8) |
((sreg.limit >> (sreg.attr.fields.g ? 12 : 0)) &
0xf0000) |
@@ -4917,7 +4905,7 @@ x86_emulate(
case X86EMUL_OPC(0x0f, 0x03): /* lsl */
generate_exception_if(!in_protmode(ctxt, ops), EXC_UD);
_regs._eflags &= ~EFLG_ZF;
_regs._eflags &= ~X86_EFLAGS_ZF;
switch ( rc = protmode_load_seg(x86_seg_none, src.val, false, &sreg,
ctxt, ops) )
{
@@ -4934,12 +4922,12 @@ x86_emulate(
case 0x02: /* LDT */
case 0x09: /* available 32/64-bit TSS */
case 0x0b: /* busy 32/64-bit TSS */
_regs._eflags |= EFLG_ZF;
_regs._eflags |= X86_EFLAGS_ZF;
break;
}
}
else
_regs._eflags |= EFLG_ZF;
_regs._eflags |= X86_EFLAGS_ZF;
break;
case X86EMUL_EXCEPTION:
if ( ctxt->event_pending )
@@ -4952,7 +4940,7 @@ x86_emulate(
rc = X86EMUL_OKAY;
break;
}
if ( _regs._eflags & EFLG_ZF )
if ( _regs._eflags & X86_EFLAGS_ZF )
dst.val = sreg.limit;
else
dst.type = OP_NONE;
@@ -4988,7 +4976,7 @@ x86_emulate(
cs.attr.bytes = 0xa9b; /* L+DB+P+S+Code */
_regs.rcx = _regs.rip;
_regs.r11 = _regs._eflags & ~EFLG_RF;
_regs.r11 = _regs._eflags & ~X86_EFLAGS_RF;
if ( (rc = ops->read_msr(mode_64bit() ? MSR_LSTAR : MSR_CSTAR,
&msr_content, ctxt)) != 0 )
@@ -4997,7 +4985,7 @@ x86_emulate(
if ( (rc = ops->read_msr(MSR_FMASK, &msr_content, ctxt)) != 0 )
goto done;
_regs._eflags &= ~(msr_content | EFLG_RF);
_regs._eflags &= ~(msr_content | X86_EFLAGS_RF);
}
else
#endif
@@ -5006,7 +4994,7 @@ x86_emulate(
_regs.r(cx) = _regs._eip;
_regs._eip = msr_content;
_regs._eflags &= ~(EFLG_VM | EFLG_IF | EFLG_RF);
_regs._eflags &= ~(X86_EFLAGS_VM | X86_EFLAGS_IF | X86_EFLAGS_RF);
}
fail_if(ops->write_segment == NULL);
@@ -5016,20 +5004,20 @@ x86_emulate(
/*
* SYSCALL (unlike most instructions) evaluates its singlestep action
* based on the resulting EFLG_TF, not the starting EFLG_TF.
* based on the resulting EFLAGS.TF, not the starting EFLAGS.TF.
*
* As the #DB is raised after the CPL change and before the OS can
* switch stack, it is a large risk for privilege escalation.
*
* 64bit kernels should mask EFLG_TF in MSR_FMASK to avoid any
* 64bit kernels should mask EFLAGS.TF in MSR_FMASK to avoid any
* vulnerability. Running the #DB handler on an IST stack is also a
* mitigation.
*
* 32bit kernels have no ability to mask EFLG_TF at all. Their only
* mitigation is to use a task gate for handling #DB (or to not use
* enable EFER.SCE to start with).
* 32bit kernels have no ability to mask EFLAGS.TF at all.
* Their only mitigation is to use a task gate for handling
* #DB (or to not use enable EFER.SCE to start with).
*/
singlestep = _regs._eflags & EFLG_TF;
singlestep = _regs._eflags & X86_EFLAGS_TF;
break;
}
@@ -5260,7 +5248,7 @@ x86_emulate(
if ( lm < 0 )
goto cannot_emulate;
_regs._eflags &= ~(EFLG_VM | EFLG_IF | EFLG_RF);
_regs._eflags &= ~(X86_EFLAGS_VM | X86_EFLAGS_IF | X86_EFLAGS_RF);
cs.sel = msr_content & ~3; /* SELECTOR_RPL_MASK */
cs.base = 0; /* flat segment */
@@ -5286,7 +5274,7 @@ x86_emulate(
goto done;
_regs.r(sp) = lm ? msr_content : (uint32_t)msr_content;
singlestep = _regs._eflags & EFLG_TF;
singlestep = _regs._eflags & X86_EFLAGS_TF;
break;
}
@@ -5328,7 +5316,7 @@ x86_emulate(
_regs.r(ip) = op_bytes == 8 ? _regs.r(dx) : _regs._edx;
_regs.r(sp) = op_bytes == 8 ? _regs.r(cx) : _regs._ecx;
singlestep = _regs._eflags & EFLG_TF;
singlestep = _regs._eflags & X86_EFLAGS_TF;
break;
}
@@ -5517,14 +5505,15 @@ x86_emulate(
((dst.orig_val << shift) |
((src.val >> (width - shift)) & ((1ull << shift) - 1))));
dst.val = truncate_word(dst.val, dst.bytes);
_regs._eflags &= ~(EFLG_OF|EFLG_SF|EFLG_ZF|EFLG_PF|EFLG_CF);
_regs._eflags &= ~(X86_EFLAGS_OF | X86_EFLAGS_SF | X86_EFLAGS_ZF |
X86_EFLAGS_PF | X86_EFLAGS_CF);
if ( (dst.val >> ((b & 8) ? (shift - 1) : (width - shift))) & 1 )
_regs._eflags |= EFLG_CF;
_regs._eflags |= X86_EFLAGS_CF;
if ( ((dst.val ^ dst.orig_val) >> (width - 1)) & 1 )
_regs._eflags |= EFLG_OF;
_regs._eflags |= ((dst.val >> (width - 1)) & 1) ? EFLG_SF : 0;
_regs._eflags |= (dst.val == 0) ? EFLG_ZF : 0;
_regs._eflags |= even_parity(dst.val) ? EFLG_PF : 0;
_regs._eflags |= X86_EFLAGS_OF;
_regs._eflags |= ((dst.val >> (width - 1)) & 1) ? X86_EFLAGS_SF : 0;
_regs._eflags |= (dst.val == 0) ? X86_EFLAGS_ZF : 0;
_regs._eflags |= even_parity(dst.val) ? X86_EFLAGS_PF : 0;
break;
}
@@ -5624,7 +5613,7 @@ x86_emulate(
src.val = _regs.r(ax);
/* cmp: %%eax - dst ==> dst and src swapped for macro invocation */
emulate_2op_SrcV("cmp", dst, src, _regs._eflags);
if ( _regs._eflags & EFLG_ZF )
if ( _regs._eflags & X86_EFLAGS_ZF )
{
/* Success: write back to memory. */
dst.val = src.orig_val;
@@ -5663,7 +5652,7 @@ x86_emulate(
asm ( "popcnt %1,%0" : "=r" (dst.val) : "rm" (src.val) );
_regs._eflags &= ~EFLAGS_MASK;
if ( !dst.val )
_regs._eflags |= EFLG_ZF;
_regs._eflags |= X86_EFLAGS_ZF;
break;
case X86EMUL_OPC(0x0f, 0xba): /* Grp8 */
@@ -5688,21 +5677,21 @@ x86_emulate(
asm ( "bsf %2,%0" ASM_FLAG_OUT(, "; setz %1")
: "=r" (dst.val), ASM_FLAG_OUT("=@ccz", "=qm") (zf)
: "rm" (src.val) );
_regs._eflags &= ~EFLG_ZF;
_regs._eflags &= ~X86_EFLAGS_ZF;
if ( (vex.pfx == vex_f3) && vcpu_has_bmi1() )
{
_regs._eflags &= ~EFLG_CF;
_regs._eflags &= ~X86_EFLAGS_CF;
if ( zf )
{
_regs._eflags |= EFLG_CF;
_regs._eflags |= X86_EFLAGS_CF;
dst.val = op_bytes * 8;
}
else if ( !dst.val )
_regs._eflags |= EFLG_ZF;
_regs._eflags |= X86_EFLAGS_ZF;
}
else if ( zf )
{
_regs._eflags |= EFLG_ZF;
_regs._eflags |= X86_EFLAGS_ZF;
dst.type = OP_NONE;
}
break;
@@ -5715,25 +5704,25 @@ x86_emulate(
asm ( "bsr %2,%0" ASM_FLAG_OUT(, "; setz %1")
: "=r" (dst.val), ASM_FLAG_OUT("=@ccz", "=qm") (zf)
: "rm" (src.val) );
_regs._eflags &= ~EFLG_ZF;
_regs._eflags &= ~X86_EFLAGS_ZF;
if ( (vex.pfx == vex_f3) && vcpu_has_lzcnt() )
{
_regs._eflags &= ~EFLG_CF;
_regs._eflags &= ~X86_EFLAGS_CF;
if ( zf )
{
_regs._eflags |= EFLG_CF;
_regs._eflags |= X86_EFLAGS_CF;
dst.val = op_bytes * 8;
}
else
{
dst.val = op_bytes * 8 - 1 - dst.val;
if ( !dst.val )
_regs._eflags |= EFLG_ZF;
_regs._eflags |= X86_EFLAGS_ZF;
}
}
else if ( zf )
{
_regs._eflags |= EFLG_ZF;
_regs._eflags |= X86_EFLAGS_ZF;
dst.type = OP_NONE;
}
break;
@@ -5807,7 +5796,7 @@ x86_emulate(
}
_regs._eflags &= ~EFLAGS_MASK;
if ( carry )
_regs._eflags |= EFLG_CF;
_regs._eflags |= X86_EFLAGS_CF;
break;
#endif
@@ -5850,7 +5839,7 @@ x86_emulate(
}
_regs._eflags &= ~EFLAGS_MASK;
if ( carry )
_regs._eflags |= EFLG_CF;
_regs._eflags |= X86_EFLAGS_CF;
break;
#endif
}
@@ -5899,7 +5888,7 @@ x86_emulate(
/* Expected != actual: store actual to rDX:rAX and clear ZF. */
_regs.r(ax) = !(rex_prefix & REX_W) ? old->u32[0] : old->u64[0];
_regs.r(dx) = !(rex_prefix & REX_W) ? old->u32[1] : old->u64[1];
_regs._eflags &= ~EFLG_ZF;
_regs._eflags &= ~X86_EFLAGS_ZF;
}
else
{
@@ -5921,7 +5910,7 @@ x86_emulate(
if ( (rc = ops->cmpxchg(ea.mem.seg, ea.mem.off, old, aux,
op_bytes, ctxt)) != X86EMUL_OKAY )
goto done;
_regs._eflags |= EFLG_ZF;
_regs._eflags |= X86_EFLAGS_ZF;
}
break;
}
@@ -6070,7 +6059,7 @@ x86_emulate(
case X86EMUL_OPC_66(0x0f38, 0xf6): /* adcx r/m,r */
case X86EMUL_OPC_F3(0x0f38, 0xf6): /* adox r/m,r */
{
unsigned int mask = rep_prefix() ? EFLG_OF : EFLG_CF;
unsigned int mask = rep_prefix() ? X86_EFLAGS_OF : X86_EFLAGS_CF;
unsigned int aux = _regs._eflags & mask ? ~0 : 0;
bool carry;
@@ -6263,7 +6252,7 @@ x86_emulate(
rc = X86EMUL_OKAY;
}
ctxt->regs->_eflags &= ~EFLG_RF;
ctxt->regs->_eflags &= ~X86_EFLAGS_RF;
done:
_put_fpu();
Reference in new issue
xen-project/xen
Block a user
Blocking a user prevents them from interacting with repositories, such as opening or commenting on pull requests or issues. Learn more about blocking a user.

The note is not visible to the blocked user.