[PATCH 7/12] Make linux/elf.h safe to be included in assembly files

Vivek Goyal
2006-10-03T17:32:13Z

The motivation for this is that currently we have 512 bytes
at the begining of a bzImage that are unused now that we don't
have a bootsector there. I plan on putting an ELF header
there, and generating it by hand with assebmly data directives
to be minimally disrutptive to the current build process.

To do that I need the elf magic constants available to my
assembly code.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
---

include/linux/elf.h | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)

diff -puN include/linux/elf.h~Make-linux-elf.h-safe-to-be-included-in-assembly-files include/linux/elf.h
--- linux-2.6.18-git17/include/linux/elf.h~Make-linux-elf.h-safe-to-be-included-in-assembly-files 2006-10-02 13:17:58.000000000 -0400
+++ linux-2.6.18-git17-root/include/linux/elf.h 2006-10-02 14:35:25.000000000 -0400
@@ -1,9 +1,11 @@
#ifndef _LINUX_ELF_H
#define _LINUX_ELF_H

+#include <linux/elf-em.h>
+
+#ifndef __ASSEMBLY__
#include <linux/types.h>
#include <linux/auxvec.h>
-#include <linux/elf-em.h>
#include <asm/elf.h>

#ifndef elf_read_implies_exec
@@ -30,6 +32,8 @@ typedef __u32 Elf64_Word;
typedef __u64 Elf64_Xword;
typedef __s64 Elf64_Sxword;

+#endif /* __ASSEMBLY__ */
+
/* These constants are for the segment types stored in the image headers */
#define PT_NULL 0
#define PT_LOAD 1
@@ -97,6 +101,8 @@ typedef __s64 Elf64_Sxword;
#define STT_COMMON 5
#define STT_TLS 6

+#ifndef __ASSEMBLY__
+
#define ELF_ST_BIND(x) ((x) >> 4)
#define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf)
#define ELF32_ST_BIND(x) ELF_ST_BIND(x)
@@ -204,12 +210,16 @@ typedef struct elf64_hdr {
Elf64_Half e_shstrndx;
} Elf64_Ehdr;

+#endif /* __ASSEMBLY__ */
+
/* These constants define the permissions on sections in the program
header, p_flags. */
#define PF_R 0x4
#define PF_W 0x2
#define PF_X 0x1

+#ifndef __ASSEMBLY__
+
typedef struct elf32_phdr{
Elf32_Word p_type;
Elf32_Off p_offset;
@@ -232,6 +242,8 @@ typedef struct elf64_phdr {
Elf64_Xword p_align; /* Segment alignment, file & memory */
} Elf64_Phdr;

+#endif /* __ASSEMBLY__ */
+
/* sh_type */
#define SHT_NULL 0
#define SHT_PROGBITS 1
@@ -265,6 +277,8 @@ typedef struct elf64_phdr {
#define SHN_ABS 0xfff1
#define SHN_COMMON 0xfff2
#define SHN_HIRESERVE 0xffff
+
+#ifndef __ASSEMBLY__

typedef struct {
Elf32_Word sh_name;
@@ -292,6 +306,8 @@ typedef struct elf64_shdr {
Elf64_Xword sh_entsize; /* Entry size if section holds table */
} Elf64_Shdr;

+#endif /* __ASSEMBLY__ */
+
#define EI_MAG0 0 /* e_ident[] indexes */
#define EI_MAG1 1
#define EI_MAG2 2
@@ -338,6 +354,8 @@ typedef struct elf64_shdr {
#define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */

+#ifndef __ASSEMBLY__
+
/* Note header in a PT_NOTE section */
typedef struct elf32_note {
Elf32_Word n_namesz; /* Name size */
@@ -368,5 +386,7 @@ extern Elf64_Dyn _DYNAMIC [];

#endif

+#endif /* __ASSEMBLY__ */
+

#endif /* _LINUX_ELF_H */
_