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

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Message-ID: <20061003171755.GG3164@in.ibm.com>
Date:	Tue, 3 Oct 2006 13:17:55 -0400
From:	Vivek Goyal <vgoyal@...ibm.com>
To:	linux kernel mailing list <linux-kernel@...r.kernel.org>
Cc:	Reloc Kernel List <fastboot@...ts.osdl.org>, ebiederm@...ssion.com,
	akpm@...l.org, ak@...e.de, horms@...ge.net.au,
	lace@...kratochvil.net, hpa@...or.com, magnus.damm@...il.com,
	lwang@...hat.com, dzickus@...hat.com, maneesh@...ibm.com
Subject: [PATCH 7/12] Make linux/elf.h safe to be included in assembly files



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@...ssion.com>
Signed-off-by: Vivek Goyal <vgoyal@...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 */
_
-
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