linux-kernel - [PATCH v2 1/5] elf: Define note name macros

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Message-Id: <20250104-elf-v2-1-77dc2e06db4e@daynix.com>
Date: Sat, 04 Jan 2025 23:38:34 +0900
From: Akihiko Odaki <akihiko.odaki@...nix.com>
To: Eric Biederman <ebiederm@...ssion.com>, Kees Cook <kees@...nel.org>, 
 Catalin Marinas <catalin.marinas@....com>, Mark Brown <broonie@...nel.org>, 
 Dave Martin <Dave.Martin@....com>, Baoquan He <bhe@...hat.com>, 
 Vivek Goyal <vgoyal@...hat.com>, Dave Young <dyoung@...hat.com>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, 
 linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org, 
 kexec@...ts.infradead.org, devel@...nix.com, 
 Akihiko Odaki <akihiko.odaki@...nix.com>
Subject: [PATCH v2 1/5] elf: Define note name macros

elf.h had a comment saying:
> Notes used in ET_CORE. Architectures export some of the arch register
> sets using the corresponding note types via the PTRACE_GETREGSET and
> PTRACE_SETREGSET requests.
> The note name for these types is "LINUX", except NT_PRFPREG that is
> named "CORE".

However, NT_PRSTATUS is also named "CORE". It is also unclear what
"these types" refers to.

To fix these problems, define a name for each note type. The added
definitions are macros so the kernel and userspace can directly refer to
them.

Signed-off-by: Akihiko Odaki <akihiko.odaki@...nix.com>
---
 include/uapi/linux/elf.h | 86 ++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 83 insertions(+), 3 deletions(-)

diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
index b44069d29cec..014b705b97d7 100644
--- a/include/uapi/linux/elf.h
+++ b/include/uapi/linux/elf.h
@@ -372,8 +372,6 @@ typedef struct elf64_shdr {
  * Notes used in ET_CORE. Architectures export some of the arch register sets
  * using the corresponding note types via the PTRACE_GETREGSET and
  * PTRACE_SETREGSET requests.
- * The note name for these types is "LINUX", except NT_PRFPREG that is named
- * "CORE".
  */
 #define NT_PRSTATUS	1
 #define NT_PRFPREG	2
@@ -460,9 +458,91 @@ typedef struct elf64_shdr {
 #define NT_LOONGARCH_HW_BREAK	0xa05   /* LoongArch hardware breakpoint registers */
 #define NT_LOONGARCH_HW_WATCH	0xa06   /* LoongArch hardware watchpoint registers */
 
-/* Note types with note name "GNU" */
+/* Note used in ET_EXEC and ET_DYN. */
 #define NT_GNU_PROPERTY_TYPE_0	5
 
+/* Note names */
+#define NN_PRSTATUS	"CORE"
+#define NN_PRFPREG	"CORE"
+#define NN_PRPSINFO	"CORE"
+#define NN_TASKSTRUCT	"CORE"
+#define NN_AUXV	"CORE"
+#define NN_SIGINFO	"CORE"
+#define NN_FILE	"CORE"
+#define NN_PRXFPREG	"LINUX"
+#define NN_PPC_VMX	"LINUX"
+#define NN_PPC_SPE	"LINUX"
+#define NN_PPC_VSX	"LINUX"
+#define NN_PPC_TAR	"LINUX"
+#define NN_PPC_PPR	"LINUX"
+#define NN_PPC_DSCR	"LINUX"
+#define NN_PPC_EBB	"LINUX"
+#define NN_PPC_PMU	"LINUX"
+#define NN_PPC_TM_CGPR	"LINUX"
+#define NN_PPC_TM_CFPR	"LINUX"
+#define NN_PPC_TM_CVMX	"LINUX"
+#define NN_PPC_TM_CVSX	"LINUX"
+#define NN_PPC_TM_SPR	"LINUX"
+#define NN_PPC_TM_CTAR	"LINUX"
+#define NN_PPC_TM_CPPR	"LINUX"
+#define NN_PPC_TM_CDSCR	"LINUX"
+#define NN_PPC_PKEY	"LINUX"
+#define NN_PPC_DEXCR	"LINUX"
+#define NN_PPC_HASHKEYR	"LINUX"
+#define NN_386_TLS	"LINUX"
+#define NN_386_IOPERM	"LINUX"
+#define NN_X86_XSTATE	"LINUX"
+#define NN_X86_SHSTK	"LINUX"
+#define NN_X86_XSAVE_LAYOUT	"LINUX"
+#define NN_S390_HIGH_GPRS	"LINUX"
+#define NN_S390_TIMER	"LINUX"
+#define NN_S390_TODCMP	"LINUX"
+#define NN_S390_TODPREG	"LINUX"
+#define NN_S390_CTRS	"LINUX"
+#define NN_S390_PREFIX	"LINUX"
+#define NN_S390_LAST_BREAK	"LINUX"
+#define NN_S390_SYSTEM_CALL	"LINUX"
+#define NN_S390_TDB	"LINUX"
+#define NN_S390_VXRS_LOW	"LINUX"
+#define NN_S390_VXRS_HIGH	"LINUX"
+#define NN_S390_GS_CB	"LINUX"
+#define NN_S390_GS_BC	"LINUX"
+#define NN_S390_RI_CB	"LINUX"
+#define NN_S390_PV_CPU_DATA	"LINUX"
+#define NN_ARM_VFP	"LINUX"
+#define NN_ARM_TLS	"LINUX"
+#define NN_ARM_HW_BREAK	"LINUX"
+#define NN_ARM_HW_WATCH	"LINUX"
+#define NN_ARM_SYSTEM_CALL	"LINUX"
+#define NN_ARM_SVE	"LINUX"
+#define NN_ARM_PAC_MASK	"LINUX"
+#define NN_ARM_PACA_KEYS	"LINUX"
+#define NN_ARM_PACG_KEYS	"LINUX"
+#define NN_ARM_TAGGED_ADDR_CTRL	"LINUX"
+#define NN_ARM_PAC_ENABLED_KEYS	"LINUX"
+#define NN_ARM_SSVE	"LINUX"
+#define NN_ARM_ZA	"LINUX"
+#define NN_ARM_ZT	"LINUX"
+#define NN_ARM_FPMR	"LINUX"
+#define NN_ARM_POE	"LINUX"
+#define NN_ARM_GCS	"LINUX"
+#define NN_ARC_V2	"LINUX"
+#define NN_VMCOREDD	"LINUX"
+#define NN_MIPS_DSP	"LINUX"
+#define NN_MIPS_FP_MODE	"LINUX"
+#define NN_MIPS_MSA	"LINUX"
+#define NN_RISCV_CSR	"LINUX"
+#define NN_RISCV_VECTOR	"LINUX"
+#define NN_RISCV_TAGGED_ADDR_CTRL	"LINUX"
+#define NN_LOONGARCH_CPUCFG	"LINUX"
+#define NN_LOONGARCH_CSR	"LINUX"
+#define NN_LOONGARCH_LSX	"LINUX"
+#define NN_LOONGARCH_LASX	"LINUX"
+#define NN_LOONGARCH_LBT	"LINUX"
+#define NN_LOONGARCH_HW_BREAK	"LINUX"
+#define NN_LOONGARCH_HW_WATCH	"LINUX"
+#define NN_GNU_PROPERTY_TYPE_0	"GNU"
+
 /* Note header in a PT_NOTE section */
 typedef struct elf32_note {
   Elf32_Word	n_namesz;	/* Name size */

-- 
2.47.1