kbuild: Merge file2alias into scripts/modpost.c

Up to now, we called "nm" to find the symbol table in vmlinux / modules.
Using code from scripts/file2alias.c allows us to do that parsing ourselves,
which is faster and will give us the opportunity to merge the
MODULE_DEVICE_TABLE() parsing into modpost, too.

1 files changed, 86 insertions, 0 deletions

diff --git a/scripts/modpost.h b/scripts/modpost.h
new file mode 100644
index 000000000000..1a5c8e829cc8
--- /dev/null
+++ b/scripts/modpost.h
@@ -0,0 +1,86 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <elf.h>
+
+#include "elfconfig.h"
+
+#if KERNEL_ELFCLASS == ELFCLASS32
+
+#define Elf_Ehdr    Elf32_Ehdr 
+#define Elf_Shdr    Elf32_Shdr 
+#define Elf_Sym     Elf32_Sym
+#define ELF_ST_BIND ELF32_ST_BIND
+
+#else
+
+#define Elf_Ehdr    Elf64_Ehdr 
+#define Elf_Shdr    Elf64_Shdr 
+#define Elf_Sym     Elf64_Sym
+#define ELF_ST_BIND ELF64_ST_BIND
+
+#endif
+
+#if KERNEL_ELFDATA != HOST_ELFDATA
+
+static 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];
+}
+
+
+
+#define TO_NATIVE(x)						\
+({								\
+	typeof(x) __x;						\
+	__endian(&(x), &(__x), sizeof(__x));			\
+	__x;							\
+})
+
+#else /* endianness matches */
+
+#define TO_NATIVE(x) (x)
+
+#endif
+
+struct buffer {
+	char *p;
+	int pos;
+	int size;
+};
+
+void __attribute__((format(printf, 2, 3)))
+buf_printf(struct buffer *buf, const char *fmt, ...);
+
+void
+buf_write(struct buffer *buf, const char *s, int len);
+
+struct module {
+	struct module *next;
+	const char *name;
+	struct symbol *unres;
+	int seen;
+	struct buffer dev_table_buf;
+};
+
+struct elf_info {
+	unsigned long size;
+	Elf_Ehdr     *hdr;
+	Elf_Shdr     *sechdrs;
+	Elf_Sym      *symtab_start;
+	Elf_Sym      *symtab_stop;
+	const char   *strtab;
+};
+
+void handle_moddevtable(struct module *mod, struct elf_info *info,
+			Elf_Sym *sym, const char *symname);
+
+void add_moddevtable(struct buffer *buf, struct module *mod);