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Add MPX support for i386

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2013-11-20  Walfred Tedeschi  <walfred.tedeschi@intel.com>

	* i386-linux-nat.c (GETXSTATEREGS_SUPPLIES): Add MPX
	registers on the range of registers to be read from
	xsave buffer.
	(i386_linux_read_description): Add case for MPX.
	* i386-linux-tdep.c: Include features/i386/i386-mpx-linux.c.
	(i386_linux_gregset_reg_offset): Add MPX registers.
	(i386_linux_core_read_description): Initialize also MPX.
	(_initialize_i386_linux_tdep): Add mpx initialization.
	* i386-tdep.h (gdbarch_tdep): Add fields bnd0r_regnum, bnd0_regnum,
	mpx_register_names.
	(i386_regnum): Add MPX registers.
	(I386_MPX_NUM_REGS): New macro.
	(i386_bnd_regnum_p): New function.
	* i386-linux-tdep.h (I386_LINUX_NUM_REGS): Set
	number of registers to be the number of BNDSTATUS.
	(tdesc_i386_mpx_linux): Add description for MPX Linux registers.
	* i386-tdep.c: Include features/i386/i386-mpx.c.
	(i386_mpx_names): Add MPX register names array.
	(i386_bnd_names): Add bnd pseudo register names array.
	(i386_bndr_regnum_p): Lookup register numbers for bnd raw
	registers.
	(i386_bndr_regnum_p): Lookup register numbers for bnd raw registers.
	(386_mpx_ctrl_regnum_p): Lookup register numbers for MPX control
	registers.
	(i386_bnd_type): New function.
	(i386_pseudo_register_type): Use i386_bnd_type for bnd pseudo
	register types.
	(i386_pseudo_register_read_into_value): Add bnd case.
	(i386_pseudo_register_write): Add bnd pseudo registers.
	(i386_register_reggroup_p): Add MPX register to the group all.
	(i386_validate_tdesc_p): Add MPX to the target 	description
	validation.
	(i386_pseudo_register_name): Add bnd pseudo registers.
	(i386_gdbarch_init): Add MPX for architecture initialization.
	(_initia_initialize_i386_tdep): Add mpx initialization.
	* i387-tdep.c (xsave_mpx_offset): New vector for MPX offsets on
	XSAVE buffer.
	(XSAVE_MPX_ADDR): New macro.
	(i387_supply_xsave): Add MPX case.
	(i387_collect_xsave): Add MPX case.
	* i387-tdep.h (I387_BND0R_REGNUM): New macro.
	(I387_BNDCFGU_REGNUM): New macro.
	(I387_NUM_MPX_REGS): New macro.
	(I387_NUM_BND_REGS): New macro.
	(I387_NUM_MPX_CTRL_REGS): New macro.
	(I387_MPXEND_REGNUM): New macro.
	* common/i386-xstate.h (I386_XSTATE_BNDREGS): New macro.
	(I386_XSTATE_BNDCFG): Likewise.
	(I386_XSTATE_MPX_MASK): Likewise.
	(I386_XSTATE_ALL_MASK): New macro represents flags for all states.
	(I386_XSTATE_BNDREGS_SIZE): New macro.
	(I386_XSTATE_BNDCFG_SIZE): Likewise.
	(I386_XSTATE_SIZE): Adapt for MPX.
	(I386_XSTATE_MAX_SIZE): Likewise.

Change-Id: I9ddb7d49434d86fa18eb6b99515203d7c567aefd
Signed-off-by: Walfred Tedeschi <walfred.tedeschi@intel.com>

Conflicts:

	gdb/ChangeLog
This commit is contained in:
Walfred Tedeschi
2013-11-20 13:02:00 +01:00
parent ccc42043f7
commit 1dbcd68cf1
9 changed files with 466 additions and 23 deletions
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130
gdb/i387-tdep.c
View File

@@ -763,9 +763,22 @@ static int xsave_avxh_offset[] =
576 + 15 * 16 /* Upper 128bit of ... %ymm15 (128 bits each). */
};
static int xsave_mpx_offset[] =
{
960 + 0 * 16, /* bnd0r...bnd3r registers. */
960 + 1 * 16,
960 + 2 * 16,
960 + 3 * 16,
1024 + 0 * 8, /* bndcfg ... bndstatus. */
1024 + 1 * 8,
};
#define XSAVE_AVXH_ADDR(tdep, xsave, regnum) \
(xsave + xsave_avxh_offset[regnum - I387_YMM0H_REGNUM (tdep)])
#define XSAVE_MPX_ADDR(tdep, xsave, regnum) \
(xsave + xsave_mpx_offset[regnum - I387_BND0R_REGNUM (tdep)])
/* Similar to i387_supply_fxsave, but use XSAVE extended state. */
void
@@ -783,7 +796,8 @@ i387_supply_xsave (struct regcache *regcache, int regnum,
x87 = 0x1,
sse = 0x2,
avxh = 0x4,
all = x87 | sse | avxh
mpx = 0x8,
all = x87 | sse | avxh | mpx
} regclass;
gdb_assert (regs != NULL);
@@ -795,6 +809,9 @@ i387_supply_xsave (struct regcache *regcache, int regnum,
else if (regnum >= I387_YMM0H_REGNUM (tdep)
&& regnum < I387_YMMENDH_REGNUM (tdep))
regclass = avxh;
else if (regnum >= I387_BND0R_REGNUM (tdep)
&& regnum < I387_MPXEND_REGNUM (tdep))
regclass = mpx;
else if (regnum >= I387_XMM0_REGNUM(tdep)
&& regnum < I387_MXCSR_REGNUM (tdep))
regclass = sse;
@@ -814,7 +831,7 @@ i387_supply_xsave (struct regcache *regcache, int regnum,
clear_bv = (~(*xstate_bv_p)) & tdep->xcr0;
}
else
clear_bv = I386_XSTATE_AVX_MASK;
clear_bv = I386_XSTATE_ALL_MASK;
/* With the delayed xsave mechanism, in between the program
starting, and the program accessing the vector registers for the
@@ -838,6 +855,14 @@ i387_supply_xsave (struct regcache *regcache, int regnum,
XSAVE_AVXH_ADDR (tdep, regs, regnum));
return;
case mpx:
if ((clear_bv & I386_XSTATE_BNDREGS))
regcache_raw_supply (regcache, regnum, zero);
else
regcache_raw_supply (regcache, regnum,
XSAVE_MPX_ADDR (tdep, regs, regnum));
return;
case sse:
if ((clear_bv & I386_XSTATE_SSE))
regcache_raw_supply (regcache, regnum, zero);
@@ -875,6 +900,42 @@ i387_supply_xsave (struct regcache *regcache, int regnum,
}
}
/* Handle the MPX registers. */
if ((tdep->xcr0 & I386_XSTATE_BNDREGS))
{
if (clear_bv & I386_XSTATE_BNDREGS)
{
for (i = I387_BND0R_REGNUM (tdep);
i < I387_BNDCFGU_REGNUM (tdep); i++)
regcache_raw_supply (regcache, i, zero);
}
else
{
for (i = I387_BND0R_REGNUM (tdep);
i < I387_BNDCFGU_REGNUM (tdep); i++)
regcache_raw_supply (regcache, i,
XSAVE_MPX_ADDR (tdep, regs, i));
}
}
/* Handle the MPX registers. */
if ((tdep->xcr0 & I386_XSTATE_BNDCFG))
{
if (clear_bv & I386_XSTATE_BNDCFG)
{
for (i = I387_BNDCFGU_REGNUM (tdep);
i < I387_MPXEND_REGNUM (tdep); i++)
regcache_raw_supply (regcache, i, zero);
}
else
{
for (i = I387_BNDCFGU_REGNUM (tdep);
i < I387_MPXEND_REGNUM (tdep); i++)
regcache_raw_supply (regcache, i,
XSAVE_MPX_ADDR (tdep, regs, i));
}
}
/* Handle the XMM registers. */
if ((tdep->xcr0 & I386_XSTATE_SSE))
{
@@ -989,7 +1050,8 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
x87 = 0x2 | check,
sse = 0x4 | check,
avxh = 0x8 | check,
all = x87 | sse | avxh
mpx = 0x10 | check,
all = x87 | sse | avxh | mpx
} regclass;
gdb_assert (tdep->st0_regnum >= I386_ST0_REGNUM);
@@ -1000,7 +1062,10 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
else if (regnum >= I387_YMM0H_REGNUM (tdep)
&& regnum < I387_YMMENDH_REGNUM (tdep))
regclass = avxh;
else if (regnum >= I387_XMM0_REGNUM(tdep)
else if (regnum >= I387_BND0R_REGNUM (tdep)
&& regnum < I387_MPXEND_REGNUM (tdep))
regclass = mpx;
else if (regnum >= I387_XMM0_REGNUM (tdep)
&& regnum < I387_MXCSR_REGNUM (tdep))
regclass = sse;
else if (regnum >= I387_ST0_REGNUM (tdep)
@@ -1032,6 +1097,16 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
/* Clear register set if its bit in xstat_bv is zero. */
if (clear_bv)
{
if ((clear_bv & I386_XSTATE_BNDREGS))
for (i = I387_BND0R_REGNUM (tdep);
i < I387_BNDCFGU_REGNUM (tdep); i++)
memset (XSAVE_MPX_ADDR (tdep, regs, i), 0, 16);
if ((clear_bv & I386_XSTATE_BNDCFG))
for (i = I387_BNDCFGU_REGNUM (tdep);
i < I387_MPXEND_REGNUM (tdep); i++)
memset (XSAVE_MPX_ADDR (tdep, regs, i), 0, 8);
if ((clear_bv & I386_XSTATE_AVX))
for (i = I387_YMM0H_REGNUM (tdep);
i < I387_YMMENDH_REGNUM (tdep); i++)
@@ -1063,6 +1138,33 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
memcpy (p, raw, 16);
}
}
/* Check if any upper MPX registers are changed. */
if ((tdep->xcr0 & I386_XSTATE_BNDREGS))
for (i = I387_BND0R_REGNUM (tdep);
i < I387_BNDCFGU_REGNUM (tdep); i++)
{
regcache_raw_collect (regcache, i, raw);
p = XSAVE_MPX_ADDR (tdep, regs, i);
if (memcmp (raw, p, 16))
{
xstate_bv |= I386_XSTATE_BNDREGS;
memcpy (p, raw, 16);
}
}
/* Check if any upper MPX registers are changed. */
if ((tdep->xcr0 & I386_XSTATE_BNDCFG))
for (i = I387_BNDCFGU_REGNUM (tdep);
i < I387_MPXEND_REGNUM (tdep); i++)
{
regcache_raw_collect (regcache, i, raw);
p = XSAVE_MPX_ADDR (tdep, regs, i);
if (memcmp (raw, p, 8))
{
xstate_bv |= I386_XSTATE_BNDCFG;
memcpy (p, raw, 8);
}
}
/* Check if any SSE registers are changed. */
if ((tdep->xcr0 & I386_XSTATE_SSE))
@@ -1113,6 +1215,25 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
}
break;
case mpx:
if (regnum < I387_BNDCFGU_REGNUM (tdep))
{
regcache_raw_collect (regcache, regnum, raw);
p = XSAVE_MPX_ADDR (tdep, regs, regnum);
if (memcmp (raw, p, 16))
{
xstate_bv |= I386_XSTATE_BNDREGS;
memcpy (p, raw, 16);
}
}
else
{
p = XSAVE_MPX_ADDR (tdep, regs, regnum);
xstate_bv |= I386_XSTATE_BNDCFG;
memcpy (p, raw, 8);
}
break;
case sse:
/* This is an SSE register. */
p = FXSAVE_ADDR (tdep, regs, regnum);
@@ -1154,6 +1275,7 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
case x87:
case sse:
case avxh:
case mpx:
/* Register REGNUM has been updated. Return. */
return;
}