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Retrieve segment registers on Windows amd64

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For amd64, CONTEXT_FULL does not contain CONTEXT_SEGMENTS, which seems
to be needed to retrieve all the segment registers.  Add it explicitly,
with a little de-cruftification.

The value of the segment registers isn't terribly useful on amd64, but
at least this makes the output of 'info registers' correct.

Before:

    (gdb)  i r cs ss ds es fs gs
    cs             0x33     51
    ss             0x2b     43
    ds             0x0      0
    es             0x0      0
    fs             0x0      0
    gs             0x0      0

After:

    (gdb) i r cs ss ds es fs gs
    cs             0x33     51
    ss             0x2b     43
    ds             0x2b     43
    es             0x2b     43
    fs             0x53     83
    gs             0x2b     43

gdb/ChangeLog

2015-02-27  Jon TURNEY  <jon.turney@dronecode.org.uk>

	* windows-nat.c (CONTEXT_DEBUGGER): Remove.
	(CONTEXT_DEBUGGER_DR): Add CONTEXT_SEGMENTS.  Incorporate flags
	from CONTEXT_DEBUGGER.
This commit is contained in:
Jon TURNEY
2015-02-18 23:13:47 +00:00
committed by Joel Brobecker
parent 73920eed1d
commit f0666312fd
2 changed files with 9 additions and 3 deletions
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6
gdb/windows-nat.c
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@@ -130,7 +130,6 @@ static CONTEXT saved_context; /* Containes the saved context from a
enum
{
FLAG_TRACE_BIT = 0x100,
CONTEXT_DEBUGGER = (CONTEXT_FULL | CONTEXT_FLOATING_POINT)
};
#endif
@@ -140,8 +139,9 @@ enum
#define CONTEXT_EXTENDED_REGISTERS 0
#endif
#define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS \
| CONTEXT_EXTENDED_REGISTERS
#define CONTEXT_DEBUGGER_DR CONTEXT_FULL | CONTEXT_FLOATING_POINT \
| CONTEXT_SEGMENTS | CONTEXT_DEBUG_REGISTERS \
| CONTEXT_EXTENDED_REGISTERS
static uintptr_t dr[8];
static int debug_registers_changed;