> @@ -241,43 +241,49 @@ static const struct tramp_frame i386_fbsd64_sigframe =
> i386_fbsd_sigframe_init
> };
>
> -/* Get XSAVE extended state xcr0 from core dump. */
> +/* See i386-fbsd-tdep.h. */
>
> uint64_t
> -i386fbsd_core_read_xcr0 (bfd *abfd)
> +i386_fbsd_core_read_xsave_info (bfd *abfd, x86_xsave_layout &layout)
> {
> asection *xstate = bfd_get_section_by_name (abfd, ".reg-xstate");
> - uint64_t xcr0;
> + if (xstate == nullptr)
> + return X86_XSTATE_SSE_MASK;
>
> - if (xstate)
> + /* Check extended state size. */
> + size_t size = bfd_section_size (xstate);
> + if (size < X86_XSTATE_AVX_SIZE)
> + return X86_XSTATE_SSE_MASK;
> +
> + char contents[8];
> + if (! bfd_get_section_contents (abfd, xstate, contents,
> + I386_FBSD_XSAVE_XCR0_OFFSET, 8))
> {
> - size_t size = bfd_section_size (xstate);
> -
> - /* Check extended state size. */
> - if (size < X86_XSTATE_AVX_SIZE)
> - xcr0 = X86_XSTATE_SSE_MASK;
> - else
> - {
> - char contents[8];
> -
> - if (! bfd_get_section_contents (abfd, xstate, contents,
> - I386_FBSD_XSAVE_XCR0_OFFSET,
> - 8))
> - {
> - warning (_("Couldn't read `xcr0' bytes from "
> - "`.reg-xstate' section in core file."));
> - return X86_XSTATE_SSE_MASK;
> - }
> -
> - xcr0 = bfd_get_64 (abfd, contents);
> - }
> + warning (_("Couldn't read `xcr0' bytes from "
> + "`.reg-xstate' section in core file."));
> + return X86_XSTATE_SSE_MASK;
> }
> - else
> - xcr0 = X86_XSTATE_SSE_MASK;
> +
> + uint64_t xcr0 = bfd_get_64 (abfd, contents);
> +
> + if (!i387_set_xsave_layout (xcr0, size, layout))
> + return X86_XSTATE_SSE_MASK;
>
> return xcr0;
> }
>
> +/* Implement the core_read_x86_xsave_layout gdbarch method. */
Should be:
/* See i386-fbsd-tdep.h. */
> +
> +bool
> +i386_fbsd_core_read_x86_xsave_layout (struct gdbarch *gdbarch,
> + x86_xsave_layout &layout)
> +{
> + if (i386_fbsd_core_read_xsave_info (core_bfd, layout) == X86_XSTATE_SSE_MASK)
> + return false;
> +
> + return true;
> +}
Rewrite as
return i386_fbsd_core_read_xsave_info (core_bfd, layout) != X86_XSTATE_SSE_MASK;
?
Otherwise:
Approved-By: Simon Marchi <simon.marchi@efficios.com>
Simon
On 7/26/23 1:04 PM, Simon Marchi wrote:
>> @@ -241,43 +241,49 @@ static const struct tramp_frame i386_fbsd64_sigframe =
>> i386_fbsd_sigframe_init
>> };
>>
>> -/* Get XSAVE extended state xcr0 from core dump. */
>> +/* See i386-fbsd-tdep.h. */
>>
>> uint64_t
>> -i386fbsd_core_read_xcr0 (bfd *abfd)
>> +i386_fbsd_core_read_xsave_info (bfd *abfd, x86_xsave_layout &layout)
>> {
>> asection *xstate = bfd_get_section_by_name (abfd, ".reg-xstate");
>> - uint64_t xcr0;
>> + if (xstate == nullptr)
>> + return X86_XSTATE_SSE_MASK;
>>
>> - if (xstate)
>> + /* Check extended state size. */
>> + size_t size = bfd_section_size (xstate);
>> + if (size < X86_XSTATE_AVX_SIZE)
>> + return X86_XSTATE_SSE_MASK;
>> +
>> + char contents[8];
>> + if (! bfd_get_section_contents (abfd, xstate, contents,
>> + I386_FBSD_XSAVE_XCR0_OFFSET, 8))
>> {
>> - size_t size = bfd_section_size (xstate);
>> -
>> - /* Check extended state size. */
>> - if (size < X86_XSTATE_AVX_SIZE)
>> - xcr0 = X86_XSTATE_SSE_MASK;
>> - else
>> - {
>> - char contents[8];
>> -
>> - if (! bfd_get_section_contents (abfd, xstate, contents,
>> - I386_FBSD_XSAVE_XCR0_OFFSET,
>> - 8))
>> - {
>> - warning (_("Couldn't read `xcr0' bytes from "
>> - "`.reg-xstate' section in core file."));
>> - return X86_XSTATE_SSE_MASK;
>> - }
>> -
>> - xcr0 = bfd_get_64 (abfd, contents);
>> - }
>> + warning (_("Couldn't read `xcr0' bytes from "
>> + "`.reg-xstate' section in core file."));
>> + return X86_XSTATE_SSE_MASK;
>> }
>> - else
>> - xcr0 = X86_XSTATE_SSE_MASK;
>> +
>> + uint64_t xcr0 = bfd_get_64 (abfd, contents);
>> +
>> + if (!i387_set_xsave_layout (xcr0, size, layout))
>> + return X86_XSTATE_SSE_MASK;
>>
>> return xcr0;
>> }
>>
>> +/* Implement the core_read_x86_xsave_layout gdbarch method. */
> Should be:
>
> /* See i386-fbsd-tdep.h. */
Fixed.
>> +
>> +bool
>> +i386_fbsd_core_read_x86_xsave_layout (struct gdbarch *gdbarch,
>> + x86_xsave_layout &layout)
>> +{
>> + if (i386_fbsd_core_read_xsave_info (core_bfd, layout) == X86_XSTATE_SSE_MASK)
>> + return false;
>> +
>> + return true;
>> +}
>
> Rewrite as
>
> return i386_fbsd_core_read_xsave_info (core_bfd, layout) != X86_XSTATE_SSE_MASK;
>
> ?
Yes, and I'll fix it in i386-linux-tdep.c as well.
> Otherwise:
>
> Approved-By: Simon Marchi <simon.marchi@efficios.com>
>
> Simon
>
@@ -224,7 +224,9 @@ amd64fbsd_core_read_description (struct gdbarch *gdbarch,
struct target_ops *target,
bfd *abfd)
{
- return amd64_target_description (i386fbsd_core_read_xcr0 (abfd), true);
+ x86_xsave_layout layout;
+ return amd64_target_description (i386_fbsd_core_read_xsave_info (abfd, layout),
+ true);
}
/* Similar to amd64_supply_fpregset, but use XSAVE extended state. */
@@ -271,8 +273,10 @@ amd64fbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
cb (".reg-x86-segbases", AMD64_FBSD_SIZEOF_SEGBASES_REGSET,
AMD64_FBSD_SIZEOF_SEGBASES_REGSET, &amd64_fbsd_segbases_regset,
"segment bases", cb_data);
- cb (".reg-xstate", X86_XSTATE_SIZE (tdep->xcr0), X86_XSTATE_SIZE (tdep->xcr0),
- &amd64fbsd_xstateregset, "XSAVE extended state", cb_data);
+ if (tdep->xsave_layout.sizeof_xsave != 0)
+ cb (".reg-xstate", tdep->xsave_layout.sizeof_xsave,
+ tdep->xsave_layout.sizeof_xsave, &amd64fbsd_xstateregset,
+ "XSAVE extended state", cb_data);
}
/* Implement the get_thread_local_address gdbarch method. */
@@ -313,6 +317,8 @@ amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
tramp_frame_prepend_unwinder (gdbarch, &amd64_fbsd_sigframe);
tdep->xsave_xcr0_offset = I386_FBSD_XSAVE_XCR0_OFFSET;
+ set_gdbarch_core_read_x86_xsave_layout
+ (gdbarch, i386_fbsd_core_read_x86_xsave_layout);
/* Iterate over core file register note sections. */
set_gdbarch_iterate_over_regset_sections
@@ -18,13 +18,13 @@
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
+#include "gdbcore.h"
#include "osabi.h"
#include "regcache.h"
#include "regset.h"
#include "trad-frame.h"
#include "tramp-frame.h"
#include "i386-fbsd-tdep.h"
-#include "gdbsupport/x86-xstate.h"
#include "i386-tdep.h"
#include "i387-tdep.h"
@@ -241,43 +241,49 @@ static const struct tramp_frame i386_fbsd64_sigframe =
i386_fbsd_sigframe_init
};
-/* Get XSAVE extended state xcr0 from core dump. */
+/* See i386-fbsd-tdep.h. */
uint64_t
-i386fbsd_core_read_xcr0 (bfd *abfd)
+i386_fbsd_core_read_xsave_info (bfd *abfd, x86_xsave_layout &layout)
{
asection *xstate = bfd_get_section_by_name (abfd, ".reg-xstate");
- uint64_t xcr0;
+ if (xstate == nullptr)
+ return X86_XSTATE_SSE_MASK;
- if (xstate)
+ /* Check extended state size. */
+ size_t size = bfd_section_size (xstate);
+ if (size < X86_XSTATE_AVX_SIZE)
+ return X86_XSTATE_SSE_MASK;
+
+ char contents[8];
+ if (! bfd_get_section_contents (abfd, xstate, contents,
+ I386_FBSD_XSAVE_XCR0_OFFSET, 8))
{
- size_t size = bfd_section_size (xstate);
-
- /* Check extended state size. */
- if (size < X86_XSTATE_AVX_SIZE)
- xcr0 = X86_XSTATE_SSE_MASK;
- else
- {
- char contents[8];
-
- if (! bfd_get_section_contents (abfd, xstate, contents,
- I386_FBSD_XSAVE_XCR0_OFFSET,
- 8))
- {
- warning (_("Couldn't read `xcr0' bytes from "
- "`.reg-xstate' section in core file."));
- return X86_XSTATE_SSE_MASK;
- }
-
- xcr0 = bfd_get_64 (abfd, contents);
- }
+ warning (_("Couldn't read `xcr0' bytes from "
+ "`.reg-xstate' section in core file."));
+ return X86_XSTATE_SSE_MASK;
}
- else
- xcr0 = X86_XSTATE_SSE_MASK;
+
+ uint64_t xcr0 = bfd_get_64 (abfd, contents);
+
+ if (!i387_set_xsave_layout (xcr0, size, layout))
+ return X86_XSTATE_SSE_MASK;
return xcr0;
}
+/* Implement the core_read_x86_xsave_layout gdbarch method. */
+
+bool
+i386_fbsd_core_read_x86_xsave_layout (struct gdbarch *gdbarch,
+ x86_xsave_layout &layout)
+{
+ if (i386_fbsd_core_read_xsave_info (core_bfd, layout) == X86_XSTATE_SSE_MASK)
+ return false;
+
+ return true;
+}
+
/* Implement the core_read_description gdbarch method. */
static const struct target_desc *
@@ -285,7 +291,9 @@ i386fbsd_core_read_description (struct gdbarch *gdbarch,
struct target_ops *target,
bfd *abfd)
{
- return i386_target_description (i386fbsd_core_read_xcr0 (abfd), true);
+ x86_xsave_layout layout;
+ return i386_target_description (i386_fbsd_core_read_xsave_info (abfd, layout),
+ true);
}
/* Similar to i386_supply_fpregset, but use XSAVE extended state. */
@@ -335,9 +343,9 @@ i386fbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
I386_FBSD_SIZEOF_SEGBASES_REGSET, &i386_fbsd_segbases_regset,
"segment bases", cb_data);
- if (tdep->xcr0 & X86_XSTATE_AVX)
- cb (".reg-xstate", X86_XSTATE_SIZE (tdep->xcr0),
- X86_XSTATE_SIZE (tdep->xcr0), &i386fbsd_xstateregset,
+ if (tdep->xsave_layout.sizeof_xsave != 0)
+ cb (".reg-xstate", tdep->xsave_layout.sizeof_xsave,
+ tdep->xsave_layout.sizeof_xsave, &i386fbsd_xstateregset,
"XSAVE extended state", cb_data);
}
@@ -386,6 +394,8 @@ i386fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
i386_elf_init_abi (info, gdbarch);
tdep->xsave_xcr0_offset = I386_FBSD_XSAVE_XCR0_OFFSET;
+ set_gdbarch_core_read_x86_xsave_layout
+ (gdbarch, i386_fbsd_core_read_x86_xsave_layout);
/* Iterate over core file register note sections. */
set_gdbarch_iterate_over_regset_sections
@@ -20,10 +20,20 @@
#ifndef I386_FBSD_TDEP_H
#define I386_FBSD_TDEP_H
+#include "gdbsupport/x86-xstate.h"
#include "regset.h"
-/* Get XSAVE extended state xcr0 from core dump. */
-extern uint64_t i386fbsd_core_read_xcr0 (bfd *abfd);
+/* Read the XSAVE extended state xcr0 value from the ABFD core file.
+ If it appears to be valid, return it and fill LAYOUT with values
+ inferred from that value.
+
+ Otherwise, return X86_XSTATE_SSE_MASK as a fallback and leave
+ LAYOUT untouched. */
+uint64_t i386_fbsd_core_read_xsave_info (bfd *abfd, x86_xsave_layout &layout);
+
+/* Implement the core_read_x86_xsave_layout gdbarch method. */
+bool i386_fbsd_core_read_x86_xsave_layout (struct gdbarch *gdbarch,
+ x86_xsave_layout &layout);
/* The format of the XSAVE extended area is determined by hardware.
Cores store the XSAVE extended area in a NT_X86_XSTATE note that