/kernel/trunk/generic/include/elf32.h |
---|
File deleted |
/kernel/trunk/generic/include/elf64.h |
---|
File deleted |
/kernel/trunk/generic/include/elf.h |
---|
30,5 → 30,305 |
#define __ELF_H__ |
#include <arch/elf.h> |
#include <arch/types.h> |
#include <mm/as.h> |
/** |
* current ELF version |
*/ |
#define EV_CURRENT 1 |
/** |
* ELF types |
*/ |
#define ET_NONE 0 /* No type */ |
#define ET_REL 1 /* Relocatable file */ |
#define ET_EXEC 2 /* Executable */ |
#define ET_DYN 3 /* Shared object */ |
#define ET_CORE 4 /* Core */ |
#define ET_LOPROC 0xff00 /* Processor specific */ |
#define ET_HIPROC 0xffff /* Processor specific */ |
/** |
* ELF machine types |
*/ |
#define EM_NO 0 /* No machine */ |
#define EM_SPARC 2 /* SPARC */ |
#define EM_386 3 /* i386 */ |
#define EM_MIPS 8 /* MIPS RS3000 */ |
#define EM_MIPS_RS3_LE 10 /* MIPS RS3000 LE */ |
#define EM_PPC 20 /* PPC32 */ |
#define EM_PPC64 21 /* PPC64 */ |
#define EM_SPARCV9 43 /* SPARC64 */ |
#define EM_IA_64 50 /* IA-64 */ |
#define EM_X86_64 62 /* AMD64/EMT64 */ |
/** |
* ELF identification indexes |
*/ |
#define EI_MAG0 0 |
#define EI_MAG1 1 |
#define EI_MAG2 2 |
#define EI_MAG3 3 |
#define EI_CLASS 4 /* File class */ |
#define EI_DATA 5 /* Data encoding */ |
#define EI_VERSION 6 /* File version */ |
#define EI_OSABI 7 |
#define EI_ABIVERSION 8 |
#define EI_PAD 9 /* Start of padding bytes */ |
#define EI_NIDENT 16 /* ELF identification table size */ |
/** |
* ELF magic number |
*/ |
#define ELFMAG0 0x7f |
#define ELFMAG1 'E' |
#define ELFMAG2 'L' |
#define ELFMAG3 'F' |
/** |
* ELF file classes |
*/ |
#define ELFCLASSNONE 0 |
#define ELFCLASS32 1 |
#define ELFCLASS64 2 |
/** |
* ELF data encoding types |
*/ |
#define ELFDATANONE 0 |
#define ELFDATA2LSB 1 /* Least significant byte first (little endian) */ |
#define ELFDATA2MSB 2 /* Most signigicant byte first (big endian) */ |
/** |
* ELF error return codes |
*/ |
#define EE_OK 0 /* No error */ |
#define EE_INVALID 1 /* Invalid ELF image */ |
#define EE_MEMORY 2 /* Cannot allocate address space */ |
#define EE_INCOMPATIBLE 3 /* ELF image is not compatible with current architecture */ |
#define EE_UNSUPPORTED 4 /* Non-supported ELF (e.g. dynamic ELFs) */ |
#define EE_IRRECOVERABLE 5 |
/** |
* ELF section types |
*/ |
#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_LOOS 0x60000000 |
#define SHT_HIOS 0x6fffffff |
#define SHT_LOPROC 0x70000000 |
#define SHT_HIPROC 0x7fffffff |
#define SHT_LOUSER 0x80000000 |
#define SHT_HIUSER 0xffffffff |
/** |
* ELF section flags |
*/ |
#define SHF_WRITE 0x1 |
#define SHF_ALLOC 0x2 |
#define SHF_EXECINSTR 0x4 |
#define SHF_MASKPROC 0xf0000000 |
/** |
* Symbol binding |
*/ |
#define STB_LOCAL 0 |
#define STB_GLOBAL 1 |
#define STB_WEAK 2 |
#define STB_LOPROC 13 |
#define STB_HIPROC 15 |
/** |
* Symbol types |
*/ |
#define STT_NOTYPE 0 |
#define STT_OBJECT 1 |
#define STT_FUNC 2 |
#define STT_SECTION 3 |
#define STT_FILE 4 |
#define STT_LOPROC 13 |
#define STT_HIPROC 15 |
/** |
* Program segment types |
*/ |
#define PT_NULL 0 |
#define PT_LOAD 1 |
#define PT_DYNAMIC 2 |
#define PT_INTERP 3 |
#define PT_NOTE 4 |
#define PT_SHLIB 5 |
#define PT_PHDR 6 |
#define PT_LOPROC 0x70000000 |
#define PT_HIPROC 0x7fffffff |
/** |
* Program segment attributes. |
*/ |
#define PF_X 1 |
#define PF_W 2 |
#define PF_R 4 |
/** |
* ELF data types |
* |
* These types are found to be identical in both 32-bit and 64-bit |
* ELF object file specifications. They are the only types used |
* in ELF header. |
*/ |
typedef __u64 elf_xword; |
typedef __s64 elf_sxword; |
typedef __u32 elf_word; |
typedef __s32 elf_sword; |
typedef __u16 elf_half; |
/** |
* 32-bit ELF data types. |
* |
* These types are specific for 32-bit format. |
*/ |
typedef __u32 elf32_addr; |
typedef __u32 elf32_off; |
/** |
* 64-bit ELF data types. |
* |
* These types are specific for 64-bit format. |
*/ |
typedef __u64 elf64_addr; |
typedef __u64 elf64_off; |
/** ELF header */ |
struct elf32_header { |
__u8 e_ident[EI_NIDENT]; |
elf_half e_type; |
elf_half e_machine; |
elf_word e_version; |
elf32_addr e_entry; |
elf32_off e_phoff; |
elf32_off e_shoff; |
elf_word e_flags; |
elf_half e_ehsize; |
elf_half e_phentsize; |
elf_half e_phnum; |
elf_half e_shentsize; |
elf_half e_shnum; |
elf_half e_shstrndx; |
}; |
struct elf64_header { |
__u8 e_ident[EI_NIDENT]; |
elf_half e_type; |
elf_half e_machine; |
elf_word e_version; |
elf64_addr e_entry; |
elf64_off e_phoff; |
elf64_off e_shoff; |
elf_word e_flags; |
elf_half e_ehsize; |
elf_half e_phentsize; |
elf_half e_phnum; |
elf_half e_shentsize; |
elf_half e_shnum; |
elf_half e_shstrndx; |
}; |
/* |
* ELF section header |
*/ |
struct elf32_section_header { |
elf_word sh_name; |
elf_word sh_type; |
elf_word sh_flags; |
elf32_addr sh_addr; |
elf32_off sh_offset; |
elf_word sh_size; |
elf_word sh_link; |
elf_word sh_info; |
elf_word sh_addralign; |
elf_word sh_entsize; |
}; |
struct elf64_section_header { |
elf_word sh_name; |
elf_word sh_type; |
elf_xword sh_flags; |
elf64_addr sh_addr; |
elf64_off sh_offset; |
elf_xword sh_size; |
elf_word sh_link; |
elf_word sh_info; |
elf_xword sh_addralign; |
elf_xword sh_entsize; |
}; |
/* |
* ELF symbol table entry |
*/ |
struct elf32_symbol { |
elf_word st_name; |
elf32_addr st_value; |
elf_word st_size; |
__u8 st_info; |
__u8 st_other; |
elf_half st_shndx; |
}; |
struct elf64_symbol { |
elf_word st_name; |
__u8 st_info; |
__u8 st_other; |
elf_half st_shndx; |
elf64_addr st_value; |
elf_xword st_size; |
}; |
/* |
* ELF program header entry |
*/ |
struct elf32_ph_entry { |
elf_word p_type; |
elf32_off p_offset; |
elf32_addr p_vaddr; |
elf32_addr p_paddr; |
elf_word p_filesz; |
elf_word p_memsz; |
elf_word p_flags; |
elf_word p_align; |
}; |
struct elf64_ph_entry { |
elf_word p_type; |
elf_word p_flags; |
elf64_off p_offset; |
elf64_addr p_vaddr; |
elf64_addr p_paddr; |
elf_xword p_filesz; |
elf_xword p_memsz; |
elf_xword p_align; |
}; |
#ifdef __32_BITS__ |
typedef struct elf32_header elf_header_t; |
typedef struct elf32_section_header elf_section_header_t; |
typedef struct elf32_symbol elf_symbol_t; |
typedef struct elf32_ph_entry elf_ph_entry_t; |
#endif |
#ifdef __64_BITS__ |
typedef struct elf64_header elf_header_t; |
typedef struct elf64_section_header elf_section_header_t; |
typedef struct elf64_symbol elf_symbol_t; |
typedef struct elf64_ph_entry elf_ph_entry_t; |
#endif |
extern int elf_load(elf_header_t *header, as_t * as); |
extern char *elf_error(int rc); |
#endif |
/kernel/trunk/generic/include/userspace.h |
---|
29,6 → 29,8 |
#ifndef __USERSPACE_H__ |
#define __USERSPACE_H__ |
extern void userspace(void) __attribute__ ((noreturn)); /**< Switch to user-space (CPU user priviledge level) */ |
#include <arch/types.h> |
extern void userspace(__address entry) __attribute__ ((noreturn)); /**< Switch to user-space (CPU user priviledge level) */ |
#endif |
/kernel/trunk/generic/src/main/kinit.c |
---|
46,6 → 46,7 |
#include <console/console.h> |
#include <interrupt.h> |
#include <console/kconsole.h> |
#include <elf.h> |
#ifdef CONFIG_SMP |
#include <arch/smp/mps.h> |
71,9 → 72,7 |
thread_t *t; |
as_t *as; |
as_area_t *a; |
__address frame; |
count_t frames; |
int i; |
int rc; |
task_t *u; |
interrupts_disable(); |
150,38 → 149,27 |
as = as_create(0); |
if (!as) |
panic("as_create\n"); |
u = task_create(as); |
if (!u) |
panic("task_create\n"); |
t = thread_create(uinit, NULL, u, THREAD_USER_STACK); |
if (!t) |
panic("thread_create\n"); |
/* |
* Create the text as_area and initialize its mapping. |
*/ |
frame = config.init_addr; |
if (IS_KA(frame)) |
frame = KA2PA(frame); |
frames = SIZE2FRAMES(config.init_size); |
rc = elf_load((elf_header_t *) config.init_addr, as); |
if (rc != EE_OK) { |
printf("elf_load failed: %s\n", elf_error(rc)); |
} else { |
u = task_create(as); |
if (!u) |
panic("task_create\n"); |
t = thread_create(uinit, (void *)((elf_header_t *) config.init_addr)->e_entry, u, THREAD_USER_STACK); |
if (!t) |
panic("thread_create\n"); |
a = as_area_create(as, AS_AREA_TEXT, frames, UTEXT_ADDRESS); |
if (!a) |
panic("as_area_create: text\n"); |
/* |
* Create the data as_area. |
*/ |
a = as_area_create(as, AS_AREA_STACK, 1, USTACK_ADDRESS); |
if (!a) |
panic("as_area_create: stack\n"); |
for (i = 0; i < frames; i++) |
as_set_mapping(as, UTEXT_ADDRESS + i * PAGE_SIZE, frame + i * FRAME_SIZE); |
/* |
* Create the data as_area. |
*/ |
a = as_area_create(as, AS_AREA_STACK, 1, USTACK_ADDRESS); |
if (!a) |
panic("as_area_create: stack\n"); |
thread_ready(t); |
thread_ready(t); |
} |
} |
#ifdef CONFIG_TEST |
/kernel/trunk/generic/src/main/uinit.c |
---|
32,9 → 32,8 |
#include <userspace.h> |
#include <print.h> |
void uinit(void *arg) |
{ |
printf("USER task, uinit thread: kernel mode\n"); |
userspace(); |
userspace((__address)(arg)); |
} |
/kernel/trunk/generic/src/lib/elf32.c |
---|
File deleted |
/kernel/trunk/generic/src/lib/elf64.c |
---|
File deleted |
/kernel/trunk/generic/src/lib/elf.c |
---|
0,0 → 1,173 |
/* |
* Copyright (C) 2006 Sergey Bondari |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
#include <elf.h> |
#include <debug.h> |
#include <arch/types.h> |
#include <typedefs.h> |
#include <mm/as.h> |
#include <mm/frame.h> |
#include <print.h> |
#include <align.h> |
static char *error_codes[] = { |
"no error", |
"invalid image", |
"address space error", |
"incompatible image", |
"unsupported image type", |
"irrecoverable error" |
}; |
static int program_header_entry(elf_header_t *header, elf_ph_entry_t *entry, as_t *as); |
static int load_segment(elf_header_t *header, elf_ph_entry_t *entry, as_t *as); |
/** ELF loader |
* |
* @param header Pointer to ELF header in memory |
* @param as Created and properly mapped address space |
* @return EE_OK on success |
*/ |
int elf_load(elf_header_t *header, as_t * as) |
{ |
int i, rc; |
/* Identify ELF */ |
if (header->e_ident[EI_MAG0] != ELFMAG0 || header->e_ident[EI_MAG1] != ELFMAG1 || |
header->e_ident[EI_MAG2] != ELFMAG2 || header->e_ident[EI_MAG3] != ELFMAG3) { |
return EE_INVALID; |
} |
/* Identify ELF compatibility */ |
if (header->e_ident[EI_DATA] != ELF_DATA_ENCODING || header->e_machine != ELF_MACHINE || |
header->e_ident[EI_VERSION] != EV_CURRENT || header->e_version != EV_CURRENT || |
header->e_ident[EI_CLASS] != ELF_CLASS) { |
return EE_INCOMPATIBLE; |
} |
if (header->e_phentsize != sizeof(elf_ph_entry_t)) |
return EE_INCOMPATIBLE; |
/* Check if the object type is supported. */ |
if (header->e_type != ET_EXEC) |
return EE_UNSUPPORTED; |
/* Walk through all program header entries and process them. */ |
for (i = 0; i < header->e_phnum; i++) { |
rc = program_header_entry(header, &((elf_ph_entry_t *)(((__u8 *) header) + header->e_phoff))[i], as); |
if (rc != EE_OK) |
return rc; |
} |
return EE_OK; |
} |
/** Print error message according to error code. |
* |
* @param rc Return code returned by elf_load(). |
* |
* @return NULL terminated description of error. |
*/ |
char *elf_error(int rc) |
{ |
ASSERT(rc < sizeof(error_codes)/sizeof(char *)); |
return error_codes[rc]; |
} |
/** Process program header entry. |
* |
* @param entry Program header entry. |
* @param as Address space into wich the ELF is being loaded. |
* |
* @return EE_OK on success, error code otherwise. |
*/ |
static int program_header_entry(elf_header_t *header, elf_ph_entry_t *entry, as_t *as) |
{ |
switch (entry->p_type) { |
case PT_NULL: |
case PT_PHDR: |
break; |
case PT_LOAD: |
return load_segment(header, entry, as); |
break; |
case PT_DYNAMIC: |
case PT_INTERP: |
case PT_SHLIB: |
case PT_NOTE: |
case PT_LOPROC: |
case PT_HIPROC: |
default: |
return EE_UNSUPPORTED; |
break; |
} |
return EE_OK; |
} |
/** Load segment described by program header entry. |
* |
* @param entry Program header entry describing segment to be loaded. |
* @parma as Address space into wich the ELF is being loaded. |
* |
* @return EE_OK on success, error code otherwise. |
*/ |
int load_segment(elf_header_t *header, elf_ph_entry_t *entry, as_t *as) |
{ |
as_area_t *a; |
int i, type = 0; |
if (entry->p_align > 1) { |
if ((entry->p_offset % entry->p_align) != (entry->p_vaddr % entry->p_align)) { |
return EE_INVALID; |
} |
} |
/* |
* Check if the segment doesn't interfere with kernel address space. |
*/ |
if (entry->p_vaddr + ALIGN_UP(entry->p_memsz, PAGE_SIZE) >= USER_ADDRESS_SPACE_END) |
return EE_MEMORY; |
if (entry->p_flags & PF_X) { |
type = AS_AREA_TEXT; |
} else if (entry->p_flags & PF_W) { |
type = AS_AREA_DATA; |
} else { |
return EE_UNSUPPORTED; |
} |
a = as_area_create(as, AS_AREA_TEXT, SIZE2FRAMES(entry->p_memsz), entry->p_vaddr); |
if (!a) |
return EE_IRRECOVERABLE; |
for (i = 0; i < SIZE2FRAMES(entry->p_filesz); i++) { |
as_set_mapping(as, entry->p_vaddr + i*PAGE_SIZE, KA2PA(((__address) header) + entry->p_offset + i*PAGE_SIZE)); |
} |
return EE_OK; |
} |