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| author | Andrew Burgess <aburgess@redhat.com> | 2024-01-27 10:40:35 +0000 |
|---|---|---|
| committer | Andrew Burgess <aburgess@redhat.com> | 2024-03-25 17:14:19 +0000 |
| commit | 7816b81e9b36ea0f57662bfd7446b573bf0c9e54 (patch) | |
| tree | 145d42dc60604530f50dff357f92e48701e2cd0c /gdb/nat | |
| parent | 0a7bb97ad2f2fe2d18a442dad265051e34eab13e (diff) | |
| download | gdb-7816b81e9b36ea0f57662bfd7446b573bf0c9e54.zip gdb-7816b81e9b36ea0f57662bfd7446b573bf0c9e54.tar.gz gdb-7816b81e9b36ea0f57662bfd7446b573bf0c9e54.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 is part of a series that aims to share more of the x86
target description creation code between GDB and gdbserver. The
I386_LINUX_XSAVE_XCR0_OFFSET #define is used as part of the target
description creation, and I noticed that this constant is defined
separately for GDB and gdbserver.
This commit moves the definition into gdb/nat/x86-linux.h, which
allows the #define to be shared.
There should be no user visible changes after this commit.
Approved-By: John Baldwin <jhb@FreeBSD.org>
Diffstat (limited to 'gdb/nat')
| -rw-r--r-- | gdb/nat/x86-linux.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gdb/nat/x86-linux.h b/gdb/nat/x86-linux.h index 15153ea..855a8d1 100644 --- a/gdb/nat/x86-linux.h +++ b/gdb/nat/x86-linux.h @@ -22,6 +22,26 @@ #include "nat/linux-nat.h" +/* 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 + /* Set whether our local mirror of LWP's debug registers has been changed since the values were last written to the thread. Nonzero indicates that a change has been made, zero indicates no change. */ |