cos2000v2/include/process.h

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/*******************************************************************************/
/* COS2000 - Compatible Operating System - LGPL v3 - Hordé Nicolas */
/* */
#include "types.h"
#include "interrupts.h"
#include "memory.h"
#define MAXPIDVALUE 0xFFFF
#define MAXNUMPROCESS 256
#define STATUS_FREE 0x0
#define STATUS_ZOMBIE 0xFF
#define STATUS_READY 0xF0
#define STATUS_RUN 0x1
#define STATUS_SLEEP 0x2
/* ELF type */
#define ET_NONE 0 //No file type
#define ET_REL 1 //Relocatable file
#define ET_EXEC 2 //Executable file
#define ET_DYN 3 //Shared object file
#define ET_CORE 4 //Core file
#define ET_LOOS 0xfe00 //Operating system-specific
#define ET_HIOS 0xfeff //Operating system-specific
#define ET_LOPROC 0xff00 //Processor-specific
#define ET_HIPROC 0xffff //Processor-specific
/* ELF identification */
#define EI_MAG0 0 //File identification
#define EI_MAG1 1 //File identification
#define EI_MAG2 2 //File identification
#define EI_MAG3 3 //File identification
#define EI_CLASS 4 //File class
#define EI_DATA 5 //Data encoding
#define EI_VERSION 6 //File version
#define EI_OSABI 7 //Operating system/ABI identification
#define EI_ABIVERSION 8 //ABI version
#define EI_PAD 9 //Start of padding bytes
#define EI_NIDENT 16 //Size of e_ident[]
/* ELF version */
#define EV_NONE 0 //Invalid version
#define EV_CURRENT 1 //Current version
/* ELF machine type */
#define EM_NONE 0 //No machine
#define EM_386 3 //Intel 80386
#define EM_IA_64 50 //Intel IA-64 processor architecture
#define EM_X86_64 62 //AMD x86-64 architecture
/* EI signature */
#define ELFMAG0 0x7f
#define ELFMAG1 'E'
#define ELFMAG2 'L'
#define ELFMAG3 'F'
/* EI file class */
#define ELFCLASSNONE 0 /* invalid class */
#define ELFCLASS32 1 /* 32-bit objects */
#define ELFCLASS64 2 /* 64-bit objects */
/* EI data structure */
#define ELFDATANONE 0 /* invalide data encoding */
#define ELFDATA2LSB 1 /* least significant byte first (0x01020304 is 0x04 0x03 0x02 0x01) */
#define ELFDATA2MSB 2 /* most significant byte first (0x01020304 is 0x01 0x02 0x03 0x04) */
/* p type */
#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
/* p flags */
#define PF_X 0x1
#define PF_W 0x2
#define PF_R 0x4
/* OS identification */
#define ELFOSABI_NONE 0 //No extensions or unspecified
#define ELFOSABI_LINUX 3 //Linux
#define ELFOSABI_COS2000 16 //COS2000
/* ELF header */
typedef struct elf32
{
u8 e_ident[EI_NIDENT];
u16 e_type;
u16 e_machine;
u32 e_version;
u8 *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;
} elf32;
typedef struct elf32p
{
u32 p_type;
u32 p_offset;
u8 *p_vaddr;
u8 *p_paddr;
u32 p_filesz;
u32 p_memsz;
u32 p_flags;
u32 p_align;
} elf32p;
typedef struct stackdef
{
u32 esp0;
u16 ss0;
} stackdef __attribute__ ((packed));
typedef struct process
{
u32 pid;
bool kernel;
regs dump;
stackdef kstack;
pd *pdd;
u32 result;
u8 status;
u8 *exec_low;
u8 *exec_high;
u8 *bss_low;
u8 *bss_high;
struct process *parent;
page_t page_head;
u32 entry;
} process __attribute__ ((packed));
u32 getcurrentpid();
void task_init();
u32 task_getfreePID();
u32 task_usePID(u32 pid);
u32 task_create(u8 * code, bool kerneltask);
u32 elf_test(u8 * src);
u32 elf_load(u8 * src, u32 pid);
void task_switch(u32 pid, bool fromkernelmode);
process *getcurrentprocess();
void task_run(u32 pid);