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AArch64: Add pauth core file section 

Used for the AArch64 pointer authentication code mask registers in Arm v8.3-a.

NT_ARM_PAC_MASK matches the value in Linux include/uapi/linux/elf.h

include/ChangeLog:

	* elf/common.h (NT_ARM_PAC_MASK): Add define.

bfd/ChangeLog:

	* elf-bfd.h (elfcore_write_aarch_pauth): Add declaration.
	* elf.c (elfcore_grok_aarch_pauth): New function.
	(elfcore_grok_note): Check for NT_ARM_PAC_MASK.
	(elfcore_write_aarch_pauth): New function.
	(elfcore_write_register_note): Check for AArch64 pauth section.
This commit is contained in:
Alan Hayward 2019-02-20 10:39:28 +00:00
parent 34d75fb5c4
commit e6c3b5bfb4
5 changed files with 43 additions and 0 deletions
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8
bfd/ChangeLog
View File

@ -1,3 +1,11 @@
2019-02-20 Alan Hayward <alan.hayward@arm.com>
* elf-bfd.h (elfcore_write_aarch_pauth): Add declaration.
* elf.c (elfcore_grok_aarch_pauth): New function.
(elfcore_grok_note): Check for NT_ARM_PAC_MASK.
(elfcore_write_aarch_pauth): New function.
(elfcore_write_register_note): Check for AArch64 pauth section.
2019-02-20 Alan Modra <amodra@gmail.com>
PR 24225

2
bfd/elf-bfd.h
View File

@ -2634,6 +2634,8 @@ extern char *elfcore_write_aarch_hw_watch
(bfd *, char *, int *, const void *, int);
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_lwpstatus
(bfd *, char *, int *, long, int, const void *);
extern char *elfcore_write_register_note

27
bfd/elf.c
View File

@ -9541,6 +9541,12 @@ elfcore_grok_aarch_sve (bfd *abfd, Elf_Internal_Note *note)
return elfcore_make_note_pseudosection (abfd, ".reg-aarch-sve", note);
}
static bfd_boolean
elfcore_grok_aarch_pauth (bfd *abfd, Elf_Internal_Note *note)
{
return elfcore_make_note_pseudosection (abfd, ".reg-aarch-pauth", note);
}
#if defined (HAVE_PRPSINFO_T)
typedef prpsinfo_t elfcore_psinfo_t;
#if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
@ -10135,6 +10141,13 @@ elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
else
return TRUE;
case NT_ARM_PAC_MASK:
if (note->namesz == 6
&& strcmp (note->namedata, "LINUX") == 0)
return elfcore_grok_aarch_pauth (abfd, note);
else
return TRUE;
case NT_PRPSINFO:
case NT_PSINFO:
if (bed->elf_backend_grok_psinfo)
@ -11494,6 +11507,18 @@ elfcore_write_aarch_sve (bfd *abfd,
note_name, NT_ARM_SVE, aarch_sve, size);
}
char *
elfcore_write_aarch_pauth (bfd *abfd,
char *buf,
int *bufsiz,
const void *aarch_pauth,
int size)
{
char *note_name = "LINUX";
return elfcore_write_note (abfd, buf, bufsiz,
note_name, NT_ARM_PAC_MASK, aarch_pauth, size);
}
char *
elfcore_write_register_note (bfd *abfd,
char *buf,
@ -11574,6 +11599,8 @@ elfcore_write_register_note (bfd *abfd,
return elfcore_write_aarch_hw_watch (abfd, buf, bufsiz, data, size);
if (strcmp (section, ".reg-aarch-sve") == 0)
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);
return NULL;
}

4
include/ChangeLog
View File

@ -1,3 +1,7 @@
2019-02-20 Alan Hayward <alan.hayward@arm.com>
* elf/common.h (NT_ARM_PAC_MASK): Add define.
2019-02-15 Saagar Jha <saagar@saagarjha.com>
* mach-o/loader.h: Use new OS names in comments.

2
include/elf/common.h
View File

@ -650,6 +650,8 @@
/* note name must be "LINUX". */
#define NT_ARM_SVE 0x405 /* AArch SVE registers. */
/* note name must be "LINUX". */
#define NT_ARM_PAC_MASK 0x406 /* AArch pointer authentication code masks */
/* note name must be "LINUX". */
#define NT_SIGINFO 0x53494749 /* Fields of siginfo_t. */
#define NT_FILE 0x46494c45 /* Description of mapped files. */