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Revert "gdb/gdbserver: share I386_LINUX_XSAVE_XCR0_OFFSET definition"

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This reverts commit 7816b81e9b.
This commit is contained in:
Andrew Burgess
2024-03-26 18:52:51 +00:00
parent 49a7660fb5
commit f06daade43
5 changed files with 41 additions and 23 deletions
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1
gdb/amd64-linux-tdep.c
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@@ -42,7 +42,6 @@
#include "arch/amd64.h"
#include "target-descriptions.h"
#include "expop.h"
#include "nat/x86-linux.h"
/* The syscall's XML filename for i386. */
#define XML_SYSCALL_FILENAME_AMD64 "syscalls/amd64-linux.xml"

1
gdb/i386-linux-tdep.c
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@@ -40,7 +40,6 @@
#include "i387-tdep.h"
#include "gdbsupport/x86-xstate.h"
#include "nat/x86-linux.h"
/* The syscall's XML filename for i386. */
#define XML_SYSCALL_FILENAME_I386 "syscalls/i386-linux.xml"

20
gdb/i386-linux-tdep.h
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@@ -58,6 +58,26 @@ extern void i386_linux_report_signal_info (struct gdbarch *gdbarch,
/* Return the target description according to XCR0. */
extern const struct target_desc *i386_linux_read_description (uint64_t xcr0);
/* 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
extern int i386_linux_gregset_reg_offset[];
/* Return x86 siginfo type. */

20
gdb/nat/x86-linux.h
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@@ -22,26 +22,6 @@
#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. */

22
gdbserver/linux-x86-low.cc
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@@ -27,7 +27,6 @@
#include "gdbsupport/x86-xstate.h"
#include "nat/x86-xstate.h"
#include "nat/gdb_ptrace.h"
#include "nat/x86-linux.h"
#ifdef __x86_64__
#include "nat/amd64-linux-siginfo.h"
@@ -833,6 +832,27 @@ x86_target::low_siginfo_fixup (siginfo_t *ptrace, gdb_byte *inf, int direction)
static int use_xml;
/* Format of XSAVE extended state is:
struct
{
fxsave_bytes[0..463]
sw_usable_bytes[464..511]
xstate_hdr_bytes[512..575]
avx_bytes[576..831]
future_state 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
/* Does the current host support the GETFPXREGS request? The header
file may or may not define it, and even if it is defined, the
kernel will return EIO if it's running on a pre-SSE processor. */