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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.
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‎bfd/ChangeLog‎

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

‎bfd/elf-bfd.h‎

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

‎bfd/elf.c‎

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

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

‎include/elf/common.h‎

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