Merging upstream version 6.7.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 37 insertions, 13 deletions

diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
index 5f94c2c9f2..69baf014da 100644
--- a/scripts/mod/modpost.h
+++ b/scripts/mod/modpost.h
@@ -1,4 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
+#include <byteswap.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -10,6 +11,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <elf.h>
+#include "../../include/linux/module_symbol.h"
 
 #include "list.h"
 #include "elfconfig.h"
@@ -50,21 +52,19 @@
 #define ELF_R_TYPE  ELF64_R_TYPE
 #endif
 
-#if KERNEL_ELFDATA != HOST_ELFDATA
+#define bswap(x) \
+({ \
+	_Static_assert(sizeof(x) == 1 || sizeof(x) == 2 || \
+		       sizeof(x) == 4 || sizeof(x) == 8, "bug"); \
+	(typeof(x))(sizeof(x) == 2 ? bswap_16(x) : \
+		    sizeof(x) == 4 ? bswap_32(x) : \
+		    sizeof(x) == 8 ? bswap_64(x) : \
+		    x); \
+})
 
-static inline void __endian(const void *src, void *dest, unsigned int size)
-{
-	unsigned int i;
-	for (i = 0; i < size; i++)
-		((unsigned char*)dest)[i] = ((unsigned char*)src)[size - i-1];
-}
+#if KERNEL_ELFDATA != HOST_ELFDATA
 
-#define TO_NATIVE(x)						\
-({								\
-	typeof(x) __x;						\
-	__endian(&(x), &(__x), sizeof(__x));			\
-	__x;							\
-})
+#define TO_NATIVE(x) (bswap(x))
 
 #else /* endianness matches */
 
@@ -128,6 +128,8 @@ struct elf_info {
 	 * take shndx from symtab_shndx_start[N] instead */
 	Elf32_Word   *symtab_shndx_start;
 	Elf32_Word   *symtab_shndx_stop;
+
+	struct symsearch *symsearch;
 };
 
 /* Accessor for sym->st_shndx, hides ugliness of "64k sections" */
@@ -154,6 +156,28 @@ static inline unsigned int get_secindex(const struct elf_info *info,
 	return index;
 }
 
+/*
+ * If there's no name there, ignore it; likewise, ignore it if it's
+ * one of the magic symbols emitted used by current tools.
+ *
+ * Internal symbols created by tools should be ignored by modpost.
+ */
+static inline bool is_valid_name(struct elf_info *elf, Elf_Sym *sym)
+{
+	const char *name = elf->strtab + sym->st_name;
+
+	if (!name || !strlen(name))
+		return false;
+	return !is_mapping_symbol(name);
+}
+
+/* symsearch.c */
+void symsearch_init(struct elf_info *elf);
+void symsearch_finish(struct elf_info *elf);
+Elf_Sym *symsearch_find_nearest(struct elf_info *elf, Elf_Addr addr,
+				unsigned int secndx, bool allow_negative,
+				Elf_Addr min_distance);
+
 /* file2alias.c */
 void handle_moddevtable(struct module *mod, struct elf_info *info,
 			Elf_Sym *sym, const char *symname);