elf.cpp File Reference

#include "mos/tasks/elf.hpp"
#include "mos/filesystem/vfs.hpp"
#include "mos/mm/mm.hpp"
#include "mos/mm/mmap.hpp"
#include "mos/platform/platform.hpp"
#include "mos/tasks/process.hpp"
#include "mos/tasks/schedule.hpp"
#include "mos/tasks/task_types.hpp"
#include "mos/tasks/thread.hpp"
#include <elf.h>
#include <mos/types.hpp>
#include <mos/vector.hpp>
#include <mos_stdlib.hpp>
#include <mos_string.hpp>

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Functions
	MOS_STATIC_ASSERT (sizeof(elf_header_t)==0x40, "elf_header has wrong size")
	MOS_STATIC_ASSERT (sizeof(elf_program_hdr_t)==0x38, "elf_program_header has wrong size")
static bool	elf_verify_header (const elf_header_t *header)
static bool	elf_read_file (FsBaseFile *file, void *buf, off_t offset, size_t size)
static ptr_t	elf_determine_loadbias (elf_header_t *elf)
static void	elf_setup_main_thread (Thread *thread, elf_startup_info_t *const info, ptr_t *const out_pargv, ptr_t *const out_penvp)
static void	elf_map_segment (const elf_program_hdr_t *const ph, ptr_t map_bias, MMContext *mm, FsBaseFile *file)
static ptr_t	elf_map_interpreter (const char *path, MMContext *mm)
__nodiscard bool	elf_do_fill_process (Process *proc, FsBaseFile *file, elf_header_t header, elf_startup_info_t *info)
bool	elf_read_and_verify_executable (FsBaseFile *file, elf_header_t *header)
static bool	elf_fill_process (Process *proc, FsBaseFile *file, mos::string_view path, const mos::vector< mos::string > &argv, const mos::vector< mos::string > &envp)
Process *	elf_create_process (mos::string_view path, Process *parent, const mos::vector< mos::string > &argv, const mos::vector< mos::string > &envp, const stdio_t *ios)

Function Documentation

MOS_STATIC_ASSERT() [1/2]

MOS_STATIC_ASSERT	(	sizeof(elf_header_t)	= =0x40,
		"elf_header has wrong size"	)

MOS_STATIC_ASSERT() [2/2]

MOS_STATIC_ASSERT	(	sizeof(elf_program_hdr_t)	= =0x38,
		"elf_program_header has wrong size"	)

elf_verify_header()

bool elf_verify_header ( const elf_header_t * header )

static

Definition at line 23 of file elf.cpp.

Referenced by elf_read_and_verify_executable().

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elf_read_file()

bool elf_read_file ( FsBaseFile * file, void * buf, off_t offset, size_t size )

staticnodiscard

Definition at line 49 of file elf.cpp.

Referenced by elf_do_fill_process(), elf_map_interpreter(), and elf_read_and_verify_executable().

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elf_determine_loadbias()

ptr_t elf_determine_loadbias ( elf_header_t * elf )

static

Definition at line 55 of file elf.cpp.

Referenced by elf_do_fill_process().

elf_setup_main_thread()

void elf_setup_main_thread ( Thread * thread, elf_startup_info_t *const info, ptr_t *const out_pargv, ptr_t *const out_penvp )

static

Typical Stack Layout:

 (low address)
 |-> u32 argc
 |-> ptr_t argv[]
 |   |-> NULL
 |-> ptr_t envp[]
 |   |-> NULL
 |-> AuxV
 |   |-> AT_...
 |   |-> AT_NULL
 |-> argv strings, NULL-terminated
 |-> environment strings, NULL-terminated
 |-> u32 zero
 (high address, end of stack)

Definition at line 79 of file elf.cpp.

Referenced by elf_do_fill_process().

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elf_map_segment()

void elf_map_segment ( const elf_program_hdr_t *const ph, ptr_t map_bias, MMContext * mm, FsBaseFile * file )

static

Definition at line 149 of file elf.cpp.

Referenced by elf_do_fill_process(), and elf_map_interpreter().

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elf_map_interpreter()

ptr_t elf_map_interpreter ( const char * path, MMContext * mm )

static

Definition at line 192 of file elf.cpp.

Referenced by elf_do_fill_process().

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elf_do_fill_process()

__nodiscard bool elf_do_fill_process ( Process * proc, FsBaseFile * file, elf_header_t header, elf_startup_info_t * info )

nodiscard

Definition at line 232 of file elf.cpp.

Referenced by elf_fill_process(), and process_do_execveat().

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elf_read_and_verify_executable()

bool elf_read_and_verify_executable ( FsBaseFile * file, elf_header_t * header )

nodiscard

Definition at line 347 of file elf.cpp.

Referenced by elf_fill_process(), elf_map_interpreter(), and process_do_execveat().

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elf_fill_process()

bool elf_fill_process ( Process * proc, FsBaseFile * file, mos::string_view path, const mos::vector< mos::string > & argv, const mos::vector< mos::string > & envp )

staticnodiscard

Definition at line 362 of file elf.cpp.

Referenced by elf_create_process().

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elf_create_process()

Process * elf_create_process	(	mos::string_view	path,
		Process *	parent,
		const mos::vector< mos::string > &	argv,
		const mos::vector< mos::string > &	envp,
		const stdio_t *	ios )

Definition at line 384 of file elf.cpp.

Referenced by mos_start_kernel(), and MOS_STATIC_ASSERT().

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