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feature (drivers): started work on a driver handler / loader

This commit is contained in:
antifallobst 2023-05-30 22:26:58 +02:00
parent 7e53ab9e7c
commit 82af1f195b
7 changed files with 185 additions and 30 deletions
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36
inc/drivers/builtin/elf/relocation.h Normal file
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@ -0,0 +1,36 @@
// This file is part of noxos and licensed under the MIT open source license
#ifndef NOXOS_RELOCATION_H
#define NOXOS_RELOCATION_H
#include <utils/stdtypes.h>
#include <drivers/builtin/elf/elf.h>
#define ELF_RELOCATION_SYMBOL(i) ((i) >> 32)
#define ELF_RELOCATION_TYPE(i) ((i) & 0xFFFFFFFFL)
#define ELF_RELOCATION_INFO(s,t) (((s) << 32) + ((t) & 0xFFFFFFFFL))
#define ELF_RELOCATION_X86_64_PC32(s,a,p) (s + a - p)
#define ELF_RELOCATION_X86_64_PLT32(l,a,p) (l + a - p)
typedef enum {
ELF_REL_NONE,
ELF_REL_64,
ELF_REL_PC32,
ELF_REL_GOT32,
ELF_REL_PLT32,
ELF_REL_COPY,
ELF_REL_GLOB_DAT,
ELF_REL_JUMP_SLOT,
ELF_REL_RELATIVE
} elf_relocation_type_E;
typedef struct {
uint64_t offset;
uint64_t info;
int64_t addend;
} elf_relocation_a_T;
void elf_relocate(elf_executable_T* executable, uint8_t* buffer, void* address);
#endif //NOXOS_RELOCATION_H

54
inc/drivers/driver.h
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@ -4,16 +4,49 @@
#define NOXOS_DRIVER_H
#include <utils/stdtypes.h>
#include <utils/bitmap.h>
#include <drivers/builtin/elf/elf.h>
#define DRIVER_MANAGER_CHUNK_SIZE 64
#define DRIVER_MEMORY_REGION_SIZE 0x100000000 // 4 GB
typedef enum {
DRIVER_TRANSPORT_PCI,
DRIVER_TRANSPORT_USB,
DRIVER_TRANSPORT_FS
} __attribute__((packed)) driver_transport_protocol_E;
typedef enum {
DRIVER_UNKNOWN = 0x0000,
DRIVER_RESERVED = 0x0001,
// Specific Driver
DRIVER_MASS_STORAGE = 0x0101,
DRIVER_FILESYSTEM = 0x0102,
DRIVER_GRAPHICS = 0x0103,
DRIVER_AUDIO = 0x0104,
// Drivers which define the transmission of data but have multiple
// intended usages, such as USB for mass storage, input, etc..
DRIVER_TRANSMISSION = 0x0201,
DRIVER_USB_DEVICE = 0x0202,
DRIVER_PCI_DEVICE = 0x0203,
DRIVER_PCIE_DEVICE = 0x0204,
DRIVER_BLUETOOTH = 0x0205,
DRIVER_ETHERNET = 0x0206,
// MISCELLANEOUS
DRIVER_EMULATION = 0x7fff
} driver_category_E;
typedef struct {
driver_transport_protocol_E transport_protocol:8;
char name [0x80];
uint16_t length;
uint8_t specific_config [];
} __attribute__((packed)) driver_config_header_T;
@ -45,15 +78,30 @@ typedef struct {
typedef struct {
uint64_t id;
void* base;
elf_executable_T* executable;
} driver_T;
typedef struct {
typedef struct driver_manager_chunk_T driver_manager_chunk_T;
struct driver_manager_chunk_T {
driver_T drivers [DRIVER_MANAGER_CHUNK_SIZE];
bitmap_T drivers_bitmap;
uint32_t free_slots;
driver_manager_chunk_T* prev;
driver_manager_chunk_T* next;
};
typedef struct {
driver_manager_chunk_T* driver_pool;
} driver_manager_T;
void driver_manager_init ();
driver_T* driver_register (driver_config_header_T* config, elf_executable_T* executable);
driver_manager_chunk_T* driver_manager_chunk_alloc(driver_manager_chunk_T* prev);
driver_T* driver_register (elf_executable_T* executable, uint8_t* buffer);
void driver_init (driver_T* driver, driver_config_header_T* conf);
driver_T* driver_lookup_pci_device (uint16_t vendor_id, uint16_t device_id);
driver_T* driver_lookup_usb_device (uint16_t vendor_id, uint16_t device_id);
driver_T* driver_lookup_fs_gpt (uint8_t guid[16]);

9
inc/mm/region.h
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@ -16,10 +16,11 @@
#define MEM_REGION_PROCESS_USABLE 0x0000080000000000
#define MEM_REGION_KERNEL 0x0000800000000000
#define MEM_REGION_KERNEL_STACK_DUMMY 0xFFFFF00000000000 // size 0x4000
#define MEM_REGION_KERNEL_HEAP 0xFFFFF80000000000
#define MEM_REGION_KERNEL_THREAD_BASE 0xFFFFFF0000000000
#define MEM_REGION_KERNEL_EXEC 0xFFFFFFFF80000000
#define MEM_REGION_KERNEL_DRIVERS 0xFFFFE80000000000 // size: up to 8 TB
#define MEM_REGION_KERNEL_STACK_DUMMY 0xFFFFF00000000000 // size: 4 KB
#define MEM_REGION_KERNEL_HEAP 0xFFFFF80000000000 // size: up to 8 TB
#define MEM_REGION_KERNEL_THREAD_BASE 0xFFFFFF0000000000 // size: up to 1022 GB
#define MEM_REGION_KERNEL_EXEC 0xFFFFFFFF80000000 // size: up to 2 GB
extern uint64_t _kernel_start;
extern uint64_t _kernel_end;

27
src/boot/kmain.c
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@ -76,20 +76,21 @@ void kmain(boot_info_T boot_info) {
log(LOG_INFO, "!=====[ Kernel Initialized ]=====!\n");
pid_t pid;
syscall_perform(SYSCALL_PROCESS_CREATE, (uint64_t)"/initrd/shell.elf", 0, (uint64_t)&pid, 0);
// pid_t pid;
// syscall_perform(SYSCALL_PROCESS_CREATE, (uint64_t)"/initrd/shell.elf", 0, (uint64_t)&pid, 0);
//
// process_T* process = scheduler_get_process(pid);
//
// scheduler_dump_info(scheduler_get_process(PROCESS_KERNEL), 0);
//
// g_tty->output = &process->stdin;
// process->stdout = &g_tty->input;
//
// syscall_perform(SYSCALL_PROCESS_SIGNAL, pid, PROCESS_SIGNAL_START, 0, 0);
process_T* process = scheduler_get_process(pid);
scheduler_dump_info(scheduler_get_process(PROCESS_KERNEL), 0);
g_tty->output = &process->stdin;
process->stdout = &g_tty->input;
syscall_perform(SYSCALL_PROCESS_SIGNAL, pid, PROCESS_SIGNAL_START, 0, 0);
uint8_t digest[20];
sha1_hash(digest, "test", 4);
vfs_node_T* node = vfs_resolve_path(&g_root_fs, "/initrd/test_driver.nxkm");
elf_executable_T* executable = elf_executable_create(node->cache->buffer);
driver_register(executable, node->cache->buffer);
CORE_HALT_FOREVER
}

4
src/drivers/builtin/elf/mapping.c
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@ -7,7 +7,7 @@
#include "utils/memory.h"
void elf_mapping_apply(elf_mapping_T* mapping, uint8_t* buffer, void* base, page_map_T* page_map) {
uint64_t num_pages = CEIL_TO(mapping->length_virtual, PFRAME_SIZE) / PFRAME_SIZE;
uint64_t num_pages = CEIL_TO(mapping->length_virtual + (mapping->offset_virtual % PFRAME_SIZE), PFRAME_SIZE) / PFRAME_SIZE;
log(LOG_INFO, "Mapping: 0x%x -> 0x%x PAGES[%d]", mapping->offset_file, base + mapping->offset_virtual, num_pages);
void* virtual_address = base + mapping->offset_virtual;
@ -28,10 +28,12 @@ void elf_mapping_apply(elf_mapping_T* mapping, uint8_t* buffer, void* base, page
memory_copy(&buffer[mapping->offset_file], virtual_address, mapping->length_file);
if (page_map != g_kernel_page_map) {
for (uint64_t i = 0; i < num_pages; i++) {
page_map_unmap_memory(g_kernel_page_map, virtual_address + (PFRAME_SIZE * i));
}
}
}
void elf_mappings_apply(elf_mapping_T* mappings, uint64_t num_mappings, uint8_t* buffer, void* base, page_map_T* page_map) {
for (uint64_t i = 0; i < num_mappings; i++) {

17
src/drivers/builtin/elf/relocation.c Normal file
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@ -0,0 +1,17 @@
// This file is part of noxos and licensed under the MIT open source license
#include <drivers/builtin/elf/relocation.h>
#include <utils/logger.h>
void elf_relocate(elf_executable_T* executable, uint8_t* buffer, void* address) {
elf_section_T* sections = (elf_section_T*)&buffer[executable->header.offset_section_header];
for (uint32_t i = 0; i < executable->header.num_section_header_entries; i++) {
if (sections[i].type != ELF_SECTION_RELOCATION_A) continue;
uint32_t num_relocations = sections[i].length / sections[i].entry_size;
elf_section_T* related_section = &sections[sections[i].info];
DEBUG("Found RELA section -> relocations: %d section: 0x%x", num_relocations, related_section);
}
}

52
src/drivers/driver.c
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@ -1,12 +1,30 @@
// This file is part of noxos and licensed under the MIT open source license
#include <drivers/driver.h>
#include <drivers/builtin/elf/relocation.h>
#include <utils/logger.h>
#include <utils/memory.h>
#include <proc/scheduler.h>
#include <mm/region.h>
driver_manager_T g_driver_manager;
void driver_manager_init() {
g_driver_manager.driver_pool = driver_manager_chunk_alloc(NULL);
}
driver_manager_chunk_T* driver_manager_chunk_alloc(driver_manager_chunk_T* prev) {
driver_manager_chunk_T* chunk = memory_allocate(sizeof(driver_manager_chunk_T));
chunk->drivers_bitmap = bitmap_init(DRIVER_MANAGER_CHUNK_SIZE);
chunk->free_slots = DRIVER_MANAGER_CHUNK_SIZE;
chunk->prev = prev;
if (chunk->prev != NULL) {
chunk->prev->next = chunk;
}
return chunk;
}
driver_T* driver_find_pci_device(uint16_t vendor_id, uint16_t device_id) {
@ -29,10 +47,42 @@ driver_T* driver_find_fs_mbr(uint8_t type) {
return NULL;
}
driver_T* driver_register(driver_config_header_T* config, elf_executable_T* executable) {
driver_T* driver_register(elf_executable_T* executable, uint8_t* buffer) {
uint64_t chunk_id = 0;
driver_manager_chunk_T* chunk = g_driver_manager.driver_pool;
while (chunk->free_slots == 0) {
if (chunk->next == NULL) {
driver_manager_chunk_alloc(chunk);
}
chunk = chunk->next;
chunk_id++;
}
driver_T* driver;
for (uint64_t i = 0; i < DRIVER_MANAGER_CHUNK_SIZE; i++) {
if (bitmap_get(&chunk->drivers_bitmap, i)) continue;
bitmap_set(&chunk->drivers_bitmap, i, true);
chunk->free_slots -= 1;
driver = &chunk->drivers[i];
driver->id = chunk_id + i;
break;
}
driver->base = (void*)(MEM_REGION_KERNEL_DRIVERS + (driver->id * DRIVER_MEMORY_REGION_SIZE));
driver->executable = executable;
elf_mappings_apply(executable->mappings, executable->num_mappings, buffer, driver->base, g_kernel_page_map);
elf_relocate(executable, buffer, driver->base);
return NULL;
}
void driver_init(driver_T* driver, driver_config_header_T* conf) {
}
driver_T* driver_lookup_pci_device(uint16_t vendor_id, uint16_t device_id) {
return NULL;
}