elf_loader_common.h

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/*
# _____     ___ ____     ___ ____
#  ____|   |    ____|   |        | |____|
# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
#-----------------------------------------------------------------------
# Copyright ps2dev - http://www.ps2dev.org
# Licenced under Academic Free License version 2.0
# Review ps2sdk README & LICENSE files for further details.
*/

#ifndef __ELF_LOADER_COMMON_H__
#define __ELF_LOADER_COMMON_H__
 
#include <elf-loader.h>
#include <stddef.h>
#include <tamtypes.h>
 
#ifdef __cplusplus
extern "C"
{
#endif
 
#define ELF_LOADER_MAX_PROGRAM_HEADERS 32
 
    typedef struct elf_loader_elf32_ehdr_
    {
        u8 e_ident[16];
        u16 e_type;
        u16 e_machine;
        u32 e_version;
        u32 e_entry;
        u32 e_phoff;
        u32 e_shoff;
        u32 e_flags;
        u16 e_ehsize;
        u16 e_phentsize;
        u16 e_phnum;
        u16 e_shentsize;
        u16 e_shnum;
        u16 e_shstrndx;
    } elf_loader_elf32_ehdr_t;
 
    typedef struct elf_loader_elf32_phdr_
    {
        u32 p_type;
        u32 p_offset;
        u32 p_vaddr;
        u32 p_paddr;
        u32 p_filesz;
        u32 p_memsz;
        u32 p_flags;
        u32 p_align;
    } elf_loader_elf32_phdr_t;
 
    // dest_addr != 0, src_addr != 0, size != 0: move
    // dest_addr != 0, src_addr == 0, size != 0: zero
    // dest_addr != 0, size == 0: exec
    typedef struct elf_loader_loaderinfo_item_
    {
        void *dest_addr;
        void *src_addr;
        u32 size;
    } elf_loader_loaderinfo_item_t;
 
#define ELF_LOADER_MAX_LOADERINFO_ITEMS (ELF_LOADER_MAX_PROGRAM_HEADERS + 3)
 
    typedef struct elf_loader_loaderinfo_
    {
        elf_loader_loaderinfo_item_t items[ELF_LOADER_MAX_LOADERINFO_ITEMS];
    } elf_loader_loaderinfo_t;
 
    typedef struct elf_loader_arginfo_
    {
        int argc;
        char *argv[16];
        char payload[256];
    } elf_loader_arginfo_t;
 
    typedef struct elf_loader_execinfo_
    {
        elf_loader_arginfo_t arginfo;
        elf_loader_loaderinfo_t loaderinfo;
    } elf_loader_execinfo_t;
 
    typedef struct elf_loader_reader_segment_info_
    {
        void *m_segment_addr;
        int m_segment_offset;
        size_t m_segment_size;
    } elf_loader_reader_segment_info_t;
 
    typedef enum elf_loader_reader_stage_
    {
        ELF_LOADER_READER_STAGE_ELF_HEADER,
        ELF_LOADER_READER_STAGE_PROGRAM_HEADERS,
        ELF_LOADER_READER_STAGE_SEGMENTS,
        ELF_LOADER_READER_STAGE_END,
    } elf_loader_reader_stage_t;
 
    typedef void *(*elf_loader_reader_allocation_callback_t)(
        void *userdata, void *pointer, ptrdiff_t old_size, ptrdiff_t new_size);
    typedef int (*elf_loader_reader_read_callback_t)(
        void *userdata,
        elf_loader_reader_stage_t stage,
        const elf_loader_reader_segment_info_t *segm_info,
        size_t segm_count);
    typedef void (*elf_loader_reader_result_callback_t)(
        void *userdata, void *pointer, ptrdiff_t pointer_size, int errval);
    typedef struct elf_loader_reader_info_
    {
        void *m_userdata;
        elf_loader_reader_allocation_callback_t m_alloc_callback;
        elf_loader_reader_read_callback_t m_read_callback;
        elf_loader_reader_result_callback_t m_result_callback;
    } elf_loader_reader_info_t;
 
    typedef struct elf_loader_reader_info_stdio_resultbuf_
    {
        void *m_buf;
        ptrdiff_t m_bufsize;
        int m_result;
    } elf_loader_reader_info_stdio_resultbuf_t;
 
    // Defined in elf.c
    extern int elf_loader_is_elf_ehdr_valid(const elf_loader_elf32_ehdr_t *ehdr);
    extern int elf_loader_is_elf_valid_for_loading(const void *buf, size_t buf_size);
    extern int elf_loader_exec_elf_prepare_loadinfo(elf_loader_execinfo_t *execinfo, const void *buf, size_t buf_size);
    extern int elf_loader_exec_elf_prepare_arginfo(
        elf_loader_execinfo_t *execinfo, const char *filename, const char *partition, int argc, char *argv[]);
    extern int elf_loader_exec_elf(elf_loader_execinfo_t *execinfo);
 
    // Defined in elf_loader_reader.c
    extern void elf_loader_reader_read_elf_file(elf_loader_reader_info_t *info);
 
    // Defined in elf_loader_stdio.c
    extern int elf_loader_reader_read_elf_file_stdio(
        elf_loader_reader_info_stdio_resultbuf_t *resultbuf, const char *filename, const char *flags);
 
#ifdef __cplusplus
}
#endif
 
#endif /* __ELF_LOADER_COMMON_H__ */