152 lines
4.0 KiB
C
152 lines
4.0 KiB
C
/*******************************************************************************/
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/* COS2000 - Compatible Operating System - LGPL v3 - Hordé Nicolas */
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/* */
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#include "types.h"
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#include "interrupts.h"
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#include "memory.h"
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#define MAXPIDVALUE 0xFFFF
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#define MAXNUMPROCESS 256
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#define STATUS_FREE 0x0
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#define STATUS_ZOMBIE 0xFF
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#define STATUS_READY 0xF0
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#define STATUS_RUN 0x1
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#define STATUS_SLEEP 0x2
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/* ELF type */
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#define ET_NONE 0 //No file type
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#define ET_REL 1 //Relocatable file
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#define ET_EXEC 2 //Executable file
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#define ET_DYN 3 //Shared object file
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#define ET_CORE 4 //Core file
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#define ET_LOOS 0xfe00 //Operating system-specific
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#define ET_HIOS 0xfeff //Operating system-specific
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#define ET_LOPROC 0xff00 //Processor-specific
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#define ET_HIPROC 0xffff //Processor-specific
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/* ELF identification */
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#define EI_MAG0 0 //File identification
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#define EI_MAG1 1 //File identification
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#define EI_MAG2 2 //File identification
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#define EI_MAG3 3 //File identification
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#define EI_CLASS 4 //File class
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#define EI_DATA 5 //Data encoding
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#define EI_VERSION 6 //File version
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#define EI_OSABI 7 //Operating system/ABI identification
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#define EI_ABIVERSION 8 //ABI version
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#define EI_PAD 9 //Start of padding bytes
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#define EI_NIDENT 16 //Size of e_ident[]
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/* ELF version */
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#define EV_NONE 0 //Invalid version
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#define EV_CURRENT 1 //Current version
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/* ELF machine type */
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#define EM_NONE 0 //No machine
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#define EM_386 3 //Intel 80386
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#define EM_IA_64 50 //Intel IA-64 processor architecture
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#define EM_X86_64 62 //AMD x86-64 architecture
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/* EI signature */
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#define ELFMAG0 0x7f
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#define ELFMAG1 'E'
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#define ELFMAG2 'L'
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#define ELFMAG3 'F'
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/* EI file class */
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#define ELFCLASSNONE 0 /* invalid class */
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#define ELFCLASS32 1 /* 32-bit objects */
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#define ELFCLASS64 2 /* 64-bit objects */
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/* EI data structure */
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#define ELFDATANONE 0 /* invalide data encoding */
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#define ELFDATA2LSB 1 /* least significant byte first (0x01020304 is 0x04 0x03 0x02 0x01) */
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#define ELFDATA2MSB 2 /* most significant byte first (0x01020304 is 0x01 0x02 0x03 0x04) */
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/* p type */
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#define PT_NULL 0
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#define PT_LOAD 1
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#define PT_DYNAMIC 2
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#define PT_INTERP 3
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#define PT_NOTE 4
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#define PT_SHLIB 5
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#define PT_PHDR 6
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#define PT_LOPROC 0x70000000
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#define PT_HIPROC 0x7fffffff
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/* p flags */
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#define PF_X 0x1
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#define PF_W 0x2
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#define PF_R 0x4
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/* OS identification */
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#define ELFOSABI_NONE 0 //No extensions or unspecified
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#define ELFOSABI_LINUX 3 //Linux
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#define ELFOSABI_COS2000 16 //COS2000
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/* ELF header */
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typedef struct elf32 {
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u8 e_ident[EI_NIDENT];
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u16 e_type;
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u16 e_machine;
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u32 e_version;
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u8* e_entry;
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u32 e_phoff;
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u32 e_shoff;
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u32 e_flags;
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u16 e_ehsize;
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u16 e_phentsize;
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u16 e_phnum;
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u16 e_shentsize;
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u16 e_shnum;
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u16 e_shstrndx;
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} elf32;
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typedef struct elf32p{
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u32 p_type;
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u32 p_offset;
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u8* p_vaddr;
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u8* p_paddr;
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u32 p_filesz;
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u32 p_memsz;
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u32 p_flags;
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u32 p_align;
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} elf32p;
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typedef struct stackdef {
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u32 esp0;
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u16 ss0;
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} stackdef __attribute__ ((packed));
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typedef struct process {
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u32 pid;
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bool kernel;
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regs dump;
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stackdef kstack;
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pd *pdd;
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u32 result;
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u8 status;
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u8 *exec_low;
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u8 *exec_high;
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u8 *bss_low;
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u8 *bss_high;
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struct process *parent;
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page_t page_head;
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u32 entry;
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} process __attribute__ ((packed));
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void task_init();
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u32 task_getfreePID ();
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u32 task_usePID (u32 pid);
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u32 task_create(u8 *code,bool kerneltask);
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u32 elf_test(u8 *src);
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u32 elf_load(u8 *src, u32 pid);
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void task_switch(u32 pid, bool fromkernelmode);
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process *getcurrentprocess();
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void task_run(u32 pid);
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