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arc: Add support for ARC HS extra registers in core files

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When a coredump is generated, there are a few registers in
ARC HS that are put under a special section, namely ".reg-v2".
It is for backward compatibility reasons with older tools that
we have decided not to extend the generic ".reg" section.

This patch makes it possible to display the information better
regarding that section.  Compare the output of "readelf" without
and with these changes:

$ readelf -n core     # without the patch
  ...
  LINUX    0x0000000c  Unknown note type: (0x00000600)
   description data: 78 08 00 00 2f 6c 64 2d 75 43 6c 69

$ readelf -n core     # with the patch
  ...
  LINUX    0x0000000c  NT_ARC_V2 (ARC HS accumulator/extra registers)
   description data: 78 08 00 00 2f 6c 64 2d 75 43 6c 69

In another commit (soon to be submitted), GDB will makes use of these
changes to parse the extra section and its registers.

bfd/ChangeLog
2020-03-26  Anton Kolesov  <anton.kolesov@synopsys.com>

	* elf-bfd.h (elfcore_write_arc_v2): Add prototype.
	* elf.c (elfcore_grok_arc_v2): New function.
	(elfcore_grok_note): Call the new function to handle the corresponding
	note.
	(elfcore_write_arc_v2): New function.
	(elfcore_write_register_note): Call the new function to handle the
	corresponding pseudo-sections.

binutils/ChangeLog
2020-03-26  Anton Kolesov  <anton.kolesov@synopsys.com>

	* readelf.c (get_note_type): Handle NT_ARC_V2.

include/elf/ChangeLog
2020-03-26  Anton Kolesov  <anton.kolesov@synopsys.com>

	* common.h (NT_ARC_V2): New macro definitions.
This commit is contained in:
Anton Kolesov 2017-05-15 16:17:29 +03:00 committed by Claudiu Zissulescu
parent 96038148d0
commit 2745674244
7 changed files with 57 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
bfd/ChangeLog
View File

@ -1,3 +1,13 @@
2020-04-23 Anton Kolesov <anton.kolesov@synopsys.com>
* elf-bfd.h (elfcore_write_arc_v2): Add prototype.
* elf.c (elfcore_grok_arc_v2): New function.
(elfcore_grok_note): Call the new function to handle the corresponding
note.
(elfcore_write_arc_v2): New function.
(elfcore_write_register_note): Call the new function to handle the
corresponding pseudo-sections.
2020-04-22 Max Filippov <jcmvbkbc@gmail.com>
PR ld/25861

2
bfd/elf-bfd.h
View File

@ -2738,6 +2738,8 @@ extern char *elfcore_write_aarch_sve
(bfd *, char *, int *, const void *, int);
extern char *elfcore_write_aarch_pauth
(bfd *, char *, int *, const void *, int);
extern char *elfcore_write_arc_v2
(bfd *, char *, int *, const void *, int);
extern char *elfcore_write_lwpstatus
(bfd *, char *, int *, long, int, const void *);
extern char *elfcore_write_register_note

27
bfd/elf.c
View File

@ -9865,6 +9865,12 @@ elfcore_grok_aarch_pauth (bfd *abfd, Elf_Internal_Note *note)
return elfcore_make_note_pseudosection (abfd, ".reg-aarch-pauth", note);
}
static bfd_boolean
elfcore_grok_arc_v2 (bfd *abfd, Elf_Internal_Note *note)
{
return elfcore_make_note_pseudosection (abfd, ".reg-arc-v2", note);
}
#if defined (HAVE_PRPSINFO_T)
typedef prpsinfo_t elfcore_psinfo_t;
#if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
@ -10424,6 +10430,13 @@ elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
else
return TRUE;
case NT_ARC_V2:
if (note->namesz == 6
&& strcmp (note->namedata, "LINUX") == 0)
return elfcore_grok_arc_v2 (abfd, note);
else
return TRUE;
case NT_ARM_VFP:
if (note->namesz == 6
&& strcmp (note->namedata, "LINUX") == 0)
@ -11835,6 +11848,18 @@ elfcore_write_aarch_pauth (bfd *abfd,
note_name, NT_ARM_PAC_MASK, aarch_pauth, size);
}
char *
elfcore_write_arc_v2 (bfd *abfd,
char *buf,
int *bufsiz,
const void *arc_v2,
int size)
{
char *note_name = "LINUX";
return elfcore_write_note (abfd, buf, bufsiz,
note_name, NT_ARC_V2, arc_v2, size);
}
char *
elfcore_write_register_note (bfd *abfd,
char *buf,
@ -11917,6 +11942,8 @@ elfcore_write_register_note (bfd *abfd,
return elfcore_write_aarch_sve (abfd, buf, bufsiz, data, size);
if (strcmp (section, ".reg-aarch-pauth") == 0)
return elfcore_write_aarch_pauth (abfd, buf, bufsiz, data, size);
if (strcmp (section, ".reg-arc-v2") == 0)
return elfcore_write_arc_v2 (abfd, buf, bufsiz, data, size);
return NULL;
}

10
binutils/ChangeLog
View File

@ -1,3 +1,13 @@
2020-04-23 Anton Kolesov <anton.kolesov@synopsys.com>
* elf-bfd.h (elfcore_write_arc_v2): Add prototype.
* elf.c (elfcore_grok_arc_v2): New function.
(elfcore_grok_note): Call the new function to handle the corresponding
note.
(elfcore_write_arc_v2): New function.
(elfcore_write_register_note): Call the new function to handle the
corresponding pseudo-sections.
2020-04-22 Max Filippov <jcmvbkbc@gmail.com>
PR ld/25861

2
binutils/readelf.c
View File

@ -17642,6 +17642,8 @@ get_note_type (Filedata * filedata, unsigned e_type)
return _("NT_ARM_HW_BREAK (AArch hardware breakpoint registers)");
case NT_ARM_HW_WATCH:
return _("NT_ARM_HW_WATCH (AArch hardware watchpoint registers)");
case NT_ARC_V2:
return _("NT_ARC_V2 (ARC HS accumulator/extra registers)");
case NT_PSTATUS:
return _("NT_PSTATUS (pstatus structure)");
case NT_FPREGS:

4
include/ChangeLog
View File

@ -1,3 +1,7 @@
2020-04-23 Anton Kolesov <anton.kolesov@synopsys.com>
* elf/common.h (NT_ARC_V2): New macro definitions.
2020-04-22 Max Filippov <jcmvbkbc@gmail.com>
PR ld/25861

2
include/elf/common.h
View File

@ -652,6 +652,8 @@
/* note name must be "LINUX". */
#define NT_ARM_PAC_MASK 0x406 /* AArch pointer authentication code masks */
/* note name must be "LINUX". */
#define NT_ARC_V2 0x600 /* ARC HS accumulator/extra registers. */
/* note name must be "LINUX". */
#define NT_SIGINFO 0x53494749 /* Fields of siginfo_t. */
#define NT_FILE 0x46494c45 /* Description of mapped files. */