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elf: move struct definition to header

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Mathieu Maret 2023-11-20 00:09:02 +01:00 committed by Mathieu Maret
parent 6a00aa4762
commit 60e71f6521
2 changed files with 93 additions and 38 deletions
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38
core/elf.c
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@ -18,35 +18,7 @@ uaddr_t loadElfProg(const char *prog, struct process * proc)
int i;
uaddr_t lastUserAddr = 0;
/**
* Typedefs, constants and structure definitions as given by the ELF
* standard specifications.
*/
typedef unsigned long Elf32_Addr;
typedef unsigned long Elf32_Word;
typedef unsigned short Elf32_Half;
typedef unsigned long Elf32_Off;
// typedef signed long Elf32_Sword;
/* Elf identification */
#define EI_NIDENT 16
typedef struct {
unsigned char e_ident[EI_NIDENT];
Elf32_Half e_type;
Elf32_Half e_machine;
Elf32_Word e_version;
Elf32_Addr e_entry;
Elf32_Off e_phoff;
Elf32_Off e_shoff;
Elf32_Word e_flags;
Elf32_Half e_ehsize;
Elf32_Half e_phentsize;
Elf32_Half e_phnum;
Elf32_Half e_shentsize;
Elf32_Half e_shnum;
Elf32_Half e_shstrndx;
} __attribute__((packed)) Elf32_Ehdr_t;
/* e_ident value */
#define ELFMAG0 0x7f
@ -97,16 +69,6 @@ uaddr_t loadElfProg(const char *prog, struct process * proc)
#define EV_NONE 0 /* invalid version */
#define EV_CURRENT 1 /* current version */
typedef struct {
Elf32_Word p_type;
Elf32_Off p_offset;
Elf32_Addr p_vaddr;
Elf32_Addr p_paddr;
Elf32_Word p_filesz;
Elf32_Word p_memsz;
Elf32_Word p_flags;
Elf32_Word p_align;
} __attribute__((packed)) Elf32_Phdr_t;
/* Reserved segment types p_type */
#define PT_NULL 0

93
core/elf.h
View File

@ -3,4 +3,97 @@
#include "process.h"
#include "thread.h"
#include "types.h"
/**
* Typedefs, constants and structure definitions as given by the ELF
* standard specifications.
*/
typedef unsigned long Elf32_Addr;
typedef unsigned long Elf32_Word;
typedef unsigned short Elf32_Half;
typedef unsigned long Elf32_Off;
// typedef signed long Elf32_Sword;
/**
* ELF 32-bit format related structures.
* See http://www.cs.cmu.edu/afs/cs/academic/class/15213-f00/docs/elf.pdf
*/
#define SHT_NULL 0
#define SHT_PROGBITS 1
#define SHT_SYMTAB 2
#define SHT_STRTAB 3
#define SHT_RELA 4
#define SHT_HASH 5
#define SHT_DYNAMIC 6
#define SHT_NOTE 7
#define SHT_NOBITS 8
#define SHT_REL 9
#define SHT_SHLIB 10
#define SHT_DYNSYM 11
#define SHT_LOPROC 0x70000000
#define SHT_HIPROC 0x7fffffff
#define SHT_LOUSER 0x80000000
#define SHT_HIUSER 0xffffffff
/** ELF Header **/
#define EI_NIDENT 16
typedef struct {
unsigned char e_ident[EI_NIDENT];
Elf32_Half e_type;
Elf32_Half e_machine;
Elf32_Word e_version;
Elf32_Addr e_entry;
Elf32_Off e_phoff;
Elf32_Off e_shoff;
Elf32_Word e_flags;
Elf32_Half e_ehsize;
Elf32_Half e_phentsize;
Elf32_Half e_phnum;
Elf32_Half e_shentsize;
Elf32_Half e_shnum;
Elf32_Half e_shstrndx;
} __attribute__((packed)) Elf32_Ehdr_t;
/** ELF Section header */
typedef struct {
Elf32_Word sh_name;
Elf32_Word sh_type;
Elf32_Word sh_flags;
Elf32_Addr sh_addr;
Elf32_Off sh_offset;
Elf32_Word sh_size;
Elf32_Word sh_link;
Elf32_Word sh_info;
Elf32_Word sh_addralign;
Elf32_Word sh_entsize;
} __attribute__((packed)) Elf32_Shdr_t;
/** ELF Symbol **/
typedef struct {
Elf32_Word st_name;
Elf32_Addr st_value;
Elf32_Word st_size;
unsigned char st_info;
unsigned char st_other;
Elf32_Half st_shndx;
} __attribute__((packed)) Elf32_Sym_t;
/** ELF Program header **/
typedef struct {
Elf32_Word p_type;
Elf32_Off p_offset;
Elf32_Addr p_vaddr;
Elf32_Addr p_paddr;
Elf32_Word p_filesz;
Elf32_Word p_memsz;
Elf32_Word p_flags;
Elf32_Word p_align;
} __attribute__((packed)) Elf32_Phdr_t;
#define ELF_SYM_TYPE(info) ((info) & 0xf)
#define ELF_SYM_TYPE_FUNC 0x2
uaddr_t loadElfProg(const char *prog, struct process *proc);