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Subject[patch] test12-pre3 include/linux/elf.h
Date
Linus, please apply.

The kernel incorrectly defines Elf64_Word and Elf64_Sword as 8 bytes,
they should be 4 bytes, Elf64_Xword and Elf64_Sxword are the 8 byte
versions. The type mismatch between kernel and user space causes field
misalignments if you copy a user space definition into the kernel or
vice versa. This patch corrects Elf64_[S]Word to 4 bytes and adds the
correct Elf64_[S]Xword where it really needs 8 bytes. It also replaces
several other incorrect types in elf.h, they now match user space and
the ELF standards.

The structures sizes and offsets have not changed, it is just a type
cleanup. Patch tested on IA64. It was sent to various 64 bit mailing
lists for review, nobody has complained.

Index: 0-test12-pre3.1/include/linux/elf.h
--- 0-test12-pre3.1/include/linux/elf.h Tue, 31 Oct 2000 08:28:16 +1100 kaos (linux-2.4/Y/0_elf.h 1.4 644)
+++ 0-test12-pre3.1(w)/include/linux/elf.h Thu, 30 Nov 2000 10:00:55 +1100 kaos (linux-2.4/Y/0_elf.h 1.4 644)
@@ -16,8 +16,10 @@ typedef __u64 Elf64_Addr;
typedef __u16 Elf64_Half;
typedef __s16 Elf64_SHalf;
typedef __u64 Elf64_Off;
-typedef __s64 Elf64_Sword;
+typedef __s32 Elf64_Sword;
-typedef __u64 Elf64_Word;
+typedef __u32 Elf64_Word;
+typedef __u64 Elf64_Xword;
+typedef __s64 Elf64_Sxword;

/* These constants are for the segment types stored in the image headers */
#define PT_NULL 0
@@ -176,10 +178,10 @@ typedef struct dynamic{
} Elf32_Dyn;

typedef struct {
- Elf64_Word d_tag; /* entry tag value */
+ Elf64_Sxword d_tag; /* entry tag value */
union {
- Elf64_Word d_val;
+ Elf64_Xword d_val;
- Elf64_Word d_ptr;
+ Elf64_Addr d_ptr;
} d_un;
} Elf64_Dyn;

@@ -370,7 +372,7 @@ typedef struct elf32_rel {

typedef struct elf64_rel {
Elf64_Addr r_offset; /* Location at which to apply the action */
- Elf64_Word r_info; /* index and type of relocation */
+ Elf64_Xword r_info; /* index and type of relocation */
} Elf64_Rel;

typedef struct elf32_rela{
@@ -381,8 +383,8 @@ typedef struct elf32_rela{

typedef struct elf64_rela {
Elf64_Addr r_offset; /* Location at which to apply the action */
- Elf64_Word r_info; /* index and type of relocation */
+ Elf64_Xword r_info; /* index and type of relocation */
- Elf64_Word r_addend; /* Constant addend used to compute value */
+ Elf64_Sxword r_addend; /* Constant addend used to compute value */
} Elf64_Rela;

typedef struct elf32_sym{
@@ -395,12 +397,12 @@ typedef struct elf32_sym{
} Elf32_Sym;

typedef struct elf64_sym {
- Elf32_Word st_name; /* Symbol name, index in string tbl (yes, Elf32) */
+ Elf64_Word st_name; /* Symbol name, index in string tbl */
unsigned char st_info; /* Type and binding attributes */
unsigned char st_other; /* No defined meaning, 0 */
Elf64_Half st_shndx; /* Associated section index */
Elf64_Addr st_value; /* Value of the symbol */
- Elf64_Word st_size; /* Associated symbol size */
+ Elf64_Xword st_size; /* Associated symbol size */
} Elf64_Sym;


@@ -425,19 +427,19 @@ typedef struct elf32_hdr{

typedef struct elf64_hdr {
unsigned char e_ident[16]; /* ELF "magic number" */
- Elf64_SHalf e_type;
+ Elf64_Half e_type;
Elf64_Half e_machine;
- __s32 e_version;
+ Elf64_Word e_version;
Elf64_Addr e_entry; /* Entry point virtual address */
Elf64_Off e_phoff; /* Program header table file offset */
Elf64_Off e_shoff; /* Section header table file offset */
- __s32 e_flags;
+ Elf64_Word e_flags;
- Elf64_SHalf e_ehsize;
+ Elf64_Half e_ehsize;
- Elf64_SHalf e_phentsize;
+ Elf64_Half e_phentsize;
- Elf64_SHalf e_phnum;
+ Elf64_Half e_phnum;
- Elf64_SHalf e_shentsize;
+ Elf64_Half e_shentsize;
- Elf64_SHalf e_shnum;
+ Elf64_Half e_shnum;
- Elf64_SHalf e_shstrndx;
+ Elf64_Half e_shstrndx;
} Elf64_Ehdr;

/* These constants define the permissions on sections in the program
@@ -458,14 +460,14 @@ typedef struct elf32_phdr{
} Elf32_Phdr;

typedef struct elf64_phdr {
- __s32 p_type;
+ Elf64_Word p_type;
- __s32 p_flags;
+ Elf64_Word p_flags;
Elf64_Off p_offset; /* Segment file offset */
Elf64_Addr p_vaddr; /* Segment virtual address */
Elf64_Addr p_paddr; /* Segment physical address */
- Elf64_Word p_filesz; /* Segment size in file */
+ Elf64_Xword p_filesz; /* Segment size in file */
- Elf64_Word p_memsz; /* Segment size in memory */
+ Elf64_Xword p_memsz; /* Segment size in memory */
- Elf64_Word p_align; /* Segment alignment, file & memory */
+ Elf64_Xword p_align; /* Segment alignment, file & memory */
} Elf64_Phdr;

/* sh_type */
@@ -522,16 +524,16 @@ typedef struct {
} Elf32_Shdr;

typedef struct elf64_shdr {
- Elf32_Word sh_name; /* Section name, index in string tbl (yes Elf32) */
+ Elf64_Word sh_name; /* Section name, index in string tbl */
- Elf32_Word sh_type; /* Type of section (yes Elf32) */
+ Elf64_Word sh_type; /* Type of section */
- Elf64_Word sh_flags; /* Miscellaneous section attributes */
+ Elf64_Xword sh_flags; /* Miscellaneous section attributes */
Elf64_Addr sh_addr; /* Section virtual addr at execution */
Elf64_Off sh_offset; /* Section file offset */
- Elf64_Word sh_size; /* Size of section in bytes */
+ Elf64_Xword sh_size; /* Size of section in bytes */
- Elf32_Word sh_link; /* Index of another section (yes Elf32) */
+ Elf64_Word sh_link; /* Index of another section */
- Elf32_Word sh_info; /* Additional section information (yes Elf32) */
+ Elf64_Word sh_info; /* Additional section information */
- Elf64_Word sh_addralign; /* Section alignment */
+ Elf64_Xword sh_addralign; /* Section alignment */
- Elf64_Word sh_entsize; /* Entry size if section holds table */
+ Elf64_Xword sh_entsize; /* Entry size if section holds table */
} Elf64_Shdr;

#define EI_MAG0 0 /* e_ident[] indexes */
@@ -578,15 +580,10 @@ typedef struct elf32_note {
} Elf32_Nhdr;

/* Note header in a PT_NOTE section */
-/*
- * For now we use the 32 bit version of the structure until we figure
- * out whether we need anything better. Note - on the Alpha, "unsigned int"
- * is only 32 bits.
- */
typedef struct elf64_note {
- Elf32_Word n_namesz; /* Name size */
+ Elf64_Word n_namesz; /* Name size */
- Elf32_Word n_descsz; /* Content size */
+ Elf64_Word n_descsz; /* Content size */
- Elf32_Word n_type; /* Content type */
+ Elf64_Word n_type; /* Content type */
} Elf64_Nhdr;

#if ELF_CLASS == ELFCLASS32
-
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