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| author | Andrew Burgess <aburgess@redhat.com> | 2024-01-27 10:40:35 +0000 |
|---|---|---|
| committer | Andrew Burgess <aburgess@redhat.com> | 2024-06-14 09:08:44 +0100 |
| commit | 8a29222b85f28a2201db50a34ac4144f961311db (patch) | |
| tree | 86f0aee1048a7ebf7cd400f5277daa441ebfac74 /gdbsupport/x86-xstate.h | |
| parent | 6b19a26ee12e348a5d9164796ccf64c0045cfe20 (diff) | |
| download | gdb-8a29222b85f28a2201db50a34ac4144f961311db.zip gdb-8a29222b85f28a2201db50a34ac4144f961311db.tar.gz gdb-8a29222b85f28a2201db50a34ac4144f961311db.tar.bz2 | |
gdb/gdbserver: share I386_LINUX_XSAVE_XCR0_OFFSET definition
Share the definition of I386_LINUX_XSAVE_XCR0_OFFSET between GDB and
gdbserver.
This commit moves the definition into gdbsupport/x86-xstate.h, which
allows the #define to be shared.
There should be no user visible changes after this commit.
Approved-By: Felix Willgerodt <felix.willgerodt@intel.com>
Diffstat (limited to 'gdbsupport/x86-xstate.h')
| -rw-r--r-- | gdbsupport/x86-xstate.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gdbsupport/x86-xstate.h b/gdbsupport/x86-xstate.h index 89c1143..11b3754 100644 --- a/gdbsupport/x86-xstate.h +++ b/gdbsupport/x86-xstate.h @@ -120,4 +120,24 @@ constexpr bool operator!= (const x86_xsave_layout &lhs, #define I387_MXCSR_INIT_VAL 0x1f80 +/* Format of XSAVE extended state is: + struct + { + fxsave_bytes[0..463] + sw_usable_bytes[464..511] + xstate_hdr_bytes[512..575] + extended state regions (AVX, MPX, AVX512, PKRU, etc.) + }; + + Same memory layout will be used for the coredump NT_X86_XSTATE + representing the XSAVE extended state registers. + + The first 8 bytes of the sw_usable_bytes[464..467] is the OS enabled + extended state mask, which is the same as the extended control register + 0 (the XFEATURE_ENABLED_MASK register), XCR0. We can use this mask + together with the mask saved in the xstate_hdr_bytes to determine what + states the processor/OS supports and what state, used or initialized, + the process/thread is in. */ +#define I386_LINUX_XSAVE_XCR0_OFFSET 464 + #endif /* COMMON_X86_XSTATE_H */ |