loader.c File Reference

#include <kernel/sched/loader.h>
#include <kernel/cpu/gdt.h>
#include <kernel/fs/vfs.h>
#include <kernel/log/log.h>
#include <kernel/mem/vmm.h>
#include <kernel/sched/sched.h>
#include <kernel/sched/thread.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/elf.h>
#include <sys/math.h>

Go to the source code of this file.

Functions
static void *	loader_load_program (thread_t *thread)
static char **	loader_setup_argv (thread_t *thread)
static void	loader_process_entry (void)
thread_t *	loader_spawn (const char **argv, priority_t priority, const path_t *cwd)
	Spawns a child process from an executable file.
	SYSCALL_DEFINE (SYS_SPAWN, pid_t, const char **argv, const spawn_fd_t *fds, const char *cwdString, spawn_attr_t *attr)
thread_t *	loader_thread_create (process_t *parent, void *entry, void *arg)
	Creates a new thread within an existing process.
	SYSCALL_DEFINE (SYS_THREAD_CREATE, tid_t, void *entry, void *arg)

Function Documentation

loader_load_program()

static void * loader_load_program ( thread_t *  thread )

static

Definition at line 16 of file loader.c.

References process_t::argv, argv_t::buffer, DEREF_DEFER, ELF_IS_VALID, ELF_PHDR_FLAGS_WRITE, ELF_PHDR_TYPE_LOAD, elf_hdr_t::entry, ERR, file, elf_phdr_t::fileSize, elf_phdr_t::flags, MAX, elf_phdr_t::memorySize, memset(), MIN, NULL, elf_phdr_t::offset, PATHNAME, elf_hdr_t::phdrAmount, elf_hdr_t::phdrSize, PML_PRESENT, PML_USER, PML_WRITE, thread_t::process, SEEK_SET, process_t::space, elf_phdr_t::type, UINT64_MAX, vfs_open(), vfs_read(), vfs_seek(), elf_phdr_t::virtAddr, vmm_alloc(), VMM_ALLOC_NONE, and vmm_protect().

Referenced by loader_process_entry().

loader_process_entry()

static void loader_process_entry ( void  )

static

Definition at line 121 of file loader.c.

References argv_t::amount, process_t::argv, argv_t::buffer, interrupt_frame_t::cs, ESPAWNFAIL, thread_t::frame, GDT_CS_RING3, GDT_SS_RING3, process_t::id, loader_jump_to_user_space(), loader_load_program(), loader_setup_argv(), LOG_DEBUG, memset(), NULL, thread_t::process, interrupt_frame_t::rdi, interrupt_frame_t::rflags, RFLAGS_ALWAYS_SET, RFLAGS_INTERRUPT_ENABLE, interrupt_frame_t::rip, ROUND_DOWN, interrupt_frame_t::rsi, interrupt_frame_t::rsp, sched_process_exit(), sched_thread(), and interrupt_frame_t::ss.

Referenced by loader_spawn().

loader_setup_argv()

static char ** loader_setup_argv ( thread_t *  thread )

static

Definition at line 103 of file loader.c.

References argv_t::amount, process_t::argv, argv_t::buffer, memcpy(), NULL, PAGE_SIZE, thread_t::process, argv_t::size, stack_pointer_t::top, and thread_t::userStack.

Referenced by loader_process_entry().

SYSCALL_DEFINE() [1/2]

SYSCALL_DEFINE	(	SYS_SPAWN	,
		pid_t	,
		const char **	argv,
		const spawn_fd_t *	fds,
		const char *	cwdString,
		spawn_attr_t *	attr
	)

Definition at line 206 of file loader.c.

References atomic_load, CONFIG_MAX_ARGC, CONFIG_MAX_FD, DEREF, EACCES, EBADF, ERR, errno, file, spawn_attr_t::flags, free(), process_t::id, loader_spawn(), MAX_PATH, NULL, PATH_EMPTY, path_put(), spawn_attr_t::priority, PRIORITY_MAX_USER, thread_t::process, sched_push_new_thread(), sched_thread(), SPAWN_FD_END, SPAWN_INHERIT_PRIORITY, thread_copy_from_user_pathname(), thread_copy_from_user_terminated(), thread_free(), vfs_ctx_get_file(), vfs_ctx_set_fd(), vfs_walk(), process_t::vfsCtx, and WALK_NONE.

SYSCALL_DEFINE() [2/2]

SYSCALL_DEFINE	(	SYS_THREAD_CREATE	,
		tid_t	,
		void *	entry,
		void *	arg
	)

Definition at line 360 of file loader.c.

References ERR, thread_t::id, loader_thread_create(), NULL, thread_t::process, sched_push_new_thread(), sched_thread(), process_t::space, and space_check_access().