Subject: [PATCH v6 01/11] ELF: UAPI and Kconfig additions for ELF program properties

From: Mark Brown <[email-masked]>
Date: Wed, 12 Feb 2020 19:28:56 +0000

From: Dave Martin <[email-masked]>

Pull the basic ELF definitions relating to the
NT_GNU_PROPERTY_TYPE_0 note from Yu-Cheng Yu's earlier x86 shstk
series.

Signed-off-by: Yu-cheng Yu <[email-masked]>
Signed-off-by: Dave Martin <[email-masked]>
Reviewed-by: Kees Cook <[email-masked]>
Reviewed-by: Catalin Marinas <[email-masked]>
Signed-off-by: Mark Brown <[email-masked]>
---
 fs/Kconfig.binfmt        | 3 +++
 include/linux/elf.h      | 8 ++++++++
 include/uapi/linux/elf.h | 1 +
 3 files changed, 12 insertions(+)

diff --git a/fs/Kconfig.binfmt b/fs/Kconfig.binfmt
index 62dc4f577ba1..d2cfe0729a73 100644
--- a/fs/Kconfig.binfmt
+++ b/fs/Kconfig.binfmt
@@ -36,6 +36,9 @@ config COMPAT_BINFMT_ELF
 config ARCH_BINFMT_ELF_STATE
 	bool
 
+config ARCH_USE_GNU_PROPERTY
+	bool
+
 config BINFMT_ELF_FDPIC
 	bool "Kernel support for FDPIC ELF binaries"
 	default y if !BINFMT_ELF
diff --git a/include/linux/elf.h b/include/linux/elf.h
index e3649b3e970e..459cddcceaac 100644
--- a/include/linux/elf.h
+++ b/include/linux/elf.h
@@ -2,6 +2,7 @@
 #ifndef _LINUX_ELF_H
 #define _LINUX_ELF_H
 
+#include <linux/types.h>
 #include <asm/elf.h>
 #include <uapi/linux/elf.h>
 
@@ -56,4 +57,11 @@ static inline int elf_coredump_extra_notes_write(struct coredump_params *cprm) {
 extern int elf_coredump_extra_notes_size(void);
 extern int elf_coredump_extra_notes_write(struct coredump_params *cprm);
 #endif
+
+/* NT_GNU_PROPERTY_TYPE_0 header */
+struct gnu_property {
+	u32 pr_type;
+	u32 pr_datasz;
+};
+
 #endif /* _LINUX_ELF_H */
diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
index 34c02e4290fe..c37731407074 100644
--- a/include/uapi/linux/elf.h
+++ b/include/uapi/linux/elf.h
@@ -36,6 +36,7 @@ typedef __s64	Elf64_Sxword;
 #define PT_LOPROC  0x70000000
 #define PT_HIPROC  0x7fffffff
 #define PT_GNU_EH_FRAME		0x6474e550
+#define PT_GNU_PROPERTY		0x6474e553
 
 #define PT_GNU_STACK	(PT_LOOS + 0x474e551)
 
-- 
2.20.1

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