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Fix PR16193 - gdbserver aborts. 

The MPX patch has broken the I386_XSTATE_SIZE macro.  For AVX machines,
it ends up returning I386_XSTATE_SSE_SIZE.  Where it first reads
I386_XSTATE_AVX_SIZE, it should have read I386_XSTATE_AVX:

 #define I386_XSTATE_SIZE(XCR0) \
     (((XCR0) & I386_XSTATE_BNDCFG) != 0 ? I386_XSTATE_BNDCFG_SIZE \
        : (((XCR0) & I386_XSTATE_BNDREGS) != 0 ? I386_XSTATE_BNDCFG_SIZE \
 -       : (((XCR0) & I386_XSTATE_AVX_SIZE) != 0 ? I386_XSTATE_AVX_SIZE \
 +       : (((XCR0) & I386_XSTATE_AVX) != 0 ? I386_XSTATE_AVX_SIZE \
        : I386_XSTATE_SSE_SIZE)))

The patch goes a step further and improves readability of the macro,
by adding a couple other auxiliary macros.


2013-11-26  Walfred Tedeschi  <walfred.tedeschi@intel.com>

	* i386-xstate.h (I386_XSTATE_MPX): New Macro.
	(I386_XSTATE_MPX_MASK): Makes use of I386_XSTATE_MPX.
	(HAS_MPX): New macro.
	(HAS_AVX): New macro.
	(I386_XSTATE_SIZE): Uses HAS_MPX and HAS_AVX.
This commit is contained in:
Walfred Tedeschi 2013-11-26 08:32:16 +00:00
parent 88e80851c9
commit 244ec0da38
2 changed files with 16 additions and 7 deletions
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8
gdb/ChangeLog
View File

@ -1,3 +1,11 @@
2013-11-26 Walfred Tedeschi <walfred.tedeschi@intel.com>
* i386-xstate.h (I386_XSTATE_MPX): New Macro.
(I386_XSTATE_MPX_MASK): Makes use of I386_XSTATE_MPX.
(HAS_MPX): New macro.
(HAS_AVX): New macro.
(I386_XSTATE_SIZE): Uses HAS_MPX and HAS_AVX.
2013-11-25 Keith Seitz <keiths@redhat.com>
PR c++/14819

15
gdb/common/i386-xstate.h
View File

@ -26,14 +26,13 @@
#define I386_XSTATE_AVX (1ULL << 2)
#define I386_XSTATE_BNDREGS (1ULL << 3)
#define I386_XSTATE_BNDCFG (1ULL << 4)
#define I386_XSTATE_MPX (I386_XSTATE_BNDREGS | I386_XSTATE_BNDCFG)
/* Supported mask and size of the extended state. */
#define I386_XSTATE_X87_MASK I386_XSTATE_X87
#define I386_XSTATE_SSE_MASK (I386_XSTATE_X87 | I386_XSTATE_SSE)
#define I386_XSTATE_AVX_MASK (I386_XSTATE_SSE_MASK | I386_XSTATE_AVX)
#define I386_XSTATE_MPX_MASK (I386_XSTATE_AVX_MASK \
| I386_XSTATE_BNDREGS \
| I386_XSTATE_BNDCFG)
#define I386_XSTATE_MPX_MASK (I386_XSTATE_AVX_MASK | I386_XSTATE_MPX)
#define I386_XSTATE_ALL_MASK I386_XSTATE_MPX_MASK
@ -44,11 +43,13 @@
#define I386_XSTATE_MAX_SIZE 1088
/* In case one of the MPX XCR0 bits is set we consider we have MPX. */
#define HAS_MPX(XCR0) (((XCR0) & I386_XSTATE_MPX) != 0)
#define HAS_AVX(XCR0) (((XCR0) & I386_XSTATE_AVX) != 0)
/* Get I386 XSAVE extended state size. */
#define I386_XSTATE_SIZE(XCR0) \
(((XCR0) & I386_XSTATE_BNDCFG) != 0 ? I386_XSTATE_BNDCFG_SIZE \
: (((XCR0) & I386_XSTATE_BNDREGS) != 0 ? I386_XSTATE_BNDCFG_SIZE \
: (((XCR0) & I386_XSTATE_AVX_SIZE) != 0 ? I386_XSTATE_AVX_SIZE \
: I386_XSTATE_SSE_SIZE)))
(HAS_MPX (XCR0) ? I386_XSTATE_BNDCFG_SIZE : \
(HAS_AVX (XCR0) ? I386_XSTATE_AVX_SIZE : I386_XSTATE_SSE_SIZE))
#endif /* I386_XSTATE_H */