mirror of
https://git.stationery.faith/corn/corn.git
synced 2024-11-24 19:10:02 +00:00
alloc on write paging, -O3 compile works, 'volatile' is the story of my life
This commit is contained in:
parent
5bec5d9fbd
commit
8e74123683
GPG key ID:
744AB800E383AE52
15 changed files with 180 additions and 134 deletions
10
Makefile
10
Makefile
|
|
@ -6,10 +6,12 @@ CC=cc
|
|||
LD=ld
|
||||
AS=nasm
|
||||
|
||||
CFLAGS += -std=c2x -ffreestanding -fno-stack-protector -g -Wall -Wextra -pedantic -lgcc -isystem include
|
||||
CFLAGS += -std=c2x -ffreestanding -lgcc -isystem include
|
||||
CFLAGS += -Wall -Wextra -pedantic
|
||||
CFLAGS += -O3 -pipe -g -fno-stack-protector
|
||||
CFLAGS += -DPAGE_SIZE=4096
|
||||
|
||||
LDFLAGS += -nmagic -nostdlib
|
||||
LDFLAGS += -nmagic --no-warn-rwx-segments -nostdlib
|
||||
|
||||
H_SRC = $(shell find src include -type f -name "*.h")
|
||||
|
||||
|
|
@ -24,6 +26,8 @@ A_OBJ = $(patsubst %.S,build/%.S.o,$(A_SRC))
|
|||
|
||||
all: build/$(ISO)
|
||||
|
||||
build: build/$(ISO)
|
||||
|
||||
clean:
|
||||
@printf "\033[31m RM \033[0m%s\n" build
|
||||
@rm -rf build/*
|
||||
|
|
@ -41,7 +45,7 @@ $(C_OBJ): build/%.o : %.c
|
|||
build/$(KERNEL): arch/$(ARCH)/linker.ld $(A_OBJ) $(C_OBJ) $(H_SRC)
|
||||
@mkdir -p $(@D)
|
||||
@printf "\033[32m LD \033[0m%s\n" $@
|
||||
@$(LD) $(LDFLAGS) --no-warn-rwx-segments -T arch/$(ARCH)/linker.ld -o build/$(KERNEL) $(A_OBJ) $(C_OBJ)
|
||||
@$(LD) $(LDFLAGS) -T arch/$(ARCH)/linker.ld -o build/$(KERNEL) $(A_OBJ) $(C_OBJ)
|
||||
|
||||
build/$(ISO): build/$(KERNEL) grub.cfg
|
||||
@mkdir -p $(@D)
|
||||
|
|
|
|||
|
|
@ -8,4 +8,4 @@
|
|||
* @param width - the width of the screen
|
||||
* @param height - the height of the screen
|
||||
*/
|
||||
uint32_t *bochs_init(uint16_t w, uint16_t h, uint8_t b);
|
||||
volatile uint32_t *bochs_init(uint16_t w, uint16_t h, uint8_t b);
|
||||
|
|
|
|||
|
|
@ -10,11 +10,17 @@
|
|||
int memcmp(const void *restrict s1, const void *restrict s2, unsigned long n);
|
||||
|
||||
/**
|
||||
* The memcpy() function copies n bytes from memory area src to memory area dest.
|
||||
* The memory areas must not overlap.
|
||||
* the memcpy() function copies n bytes from memory area src to memory area dest.
|
||||
* the memory areas must not overlap.
|
||||
*/
|
||||
void *memcpy(void *restrict dest, const void *restrict src, unsigned long n);
|
||||
|
||||
/**
|
||||
* the memcpy() function copies n bytes from memory area src to memory area dest.
|
||||
* the memory areas must not overlap.
|
||||
*/
|
||||
volatile void *memcpyv(volatile void *dest, const volatile void *src, unsigned long n);
|
||||
|
||||
/**
|
||||
* The memmove() function copies n bytes from memory area src to memory area dest. The memory areas
|
||||
* may overlap: copying takes place as though the bytes in src are first copied into a temporary array
|
||||
|
|
@ -28,6 +34,12 @@ void *memmove(void *dest, const void *src, unsigned long n);
|
|||
*/
|
||||
void *memset(void *restrict dest, int c, unsigned long n);
|
||||
|
||||
/**
|
||||
* The memset() function fills the first n bytes of the memory area pointed to by s with the constant
|
||||
* byte c.
|
||||
*/
|
||||
volatile void *memsetv(volatile void *dest, int c, unsigned long n);
|
||||
|
||||
/**
|
||||
* The strcmp() function compares the two strings s1 and s2. The locale is not taken into account
|
||||
* (for a locale-aware comparison, see strcoll(3)). The comparison is done using unsigned characters.
|
||||
|
|
|
|||
|
|
@ -8,13 +8,13 @@ struct stackframe {
|
|||
|
||||
size_t backtrace(void **dst, size_t len) {
|
||||
struct stackframe *rbp;
|
||||
__asm__ volatile ("mov %%rbp, %0" : "=r"(rbp));
|
||||
__asm__ ("mov %%rbp, %0" : "=r"(rbp));
|
||||
return backtrace_ex(dst, len, rbp->rip, rbp->rbp);
|
||||
}
|
||||
|
||||
size_t backtrace_ex(void **dst, size_t len, void *ip, void *bp) {
|
||||
struct stackframe *frame = bp;
|
||||
__asm__ volatile ("mov %%rbp, %0" : "=r"(frame));
|
||||
__asm__ ("mov %%rbp, %0" : "=r"(frame));
|
||||
if (len > 0) {
|
||||
dst[0] = ip;
|
||||
}
|
||||
|
|
@ -28,7 +28,7 @@ size_t backtrace_ex(void **dst, size_t len, void *ip, void *bp) {
|
|||
|
||||
void log_backtrace() {
|
||||
struct stackframe *rbp;
|
||||
__asm__ volatile ("mov %%rbp, %0" : "=r"(rbp));
|
||||
__asm__ ("mov %%rbp, %0" : "=r"(rbp));
|
||||
log_backtrace_ex(rbp->rip, rbp->rbp);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -376,7 +376,7 @@ static int debugger_prompt(struct isr_regs *state) {
|
|||
}
|
||||
}
|
||||
|
||||
void debugger(struct isr_regs *state, int cause) {
|
||||
void debugger(struct isr_regs *volatile state, int cause) {
|
||||
struct dr6 dr6;
|
||||
__asm__ volatile ("mov %%dr6, %0" : "=r"(dr6));
|
||||
|
||||
|
|
@ -398,7 +398,8 @@ void debugger(struct isr_regs *state, int cause) {
|
|||
dbg_steps = 0;
|
||||
dbg_continue = 0;
|
||||
|
||||
((struct rflags *)&state->rflags)->tf = 0;
|
||||
struct rflags *rflags = (struct rflags *) &state->rflags;
|
||||
rflags->tf = 0;
|
||||
|
||||
if (dr6.b0) {
|
||||
state->rip += bkps[0].instr_len;
|
||||
|
|
|
|||
|
|
@ -5,6 +5,7 @@
|
|||
#include "idt.h"
|
||||
#include "backtrace.h"
|
||||
#include "debugger.h"
|
||||
#include "../paging.h"
|
||||
#include "../bindings.h"
|
||||
#include "../drivers/pic.h"
|
||||
|
||||
|
|
@ -72,6 +73,10 @@ void idt_init(void) {
|
|||
__asm__ volatile ("lidt %0" : : "m"(idtr));
|
||||
}
|
||||
|
||||
#define EX_DEBUG 0x01
|
||||
#define EX_BREAKPOINT 0x03
|
||||
#define EX_PAGE_FAULT 0x0e
|
||||
|
||||
// Intel manual vol 3 ch 6.3.1
|
||||
char *EXCEPTIONS[] = {
|
||||
"Division Error",
|
||||
|
|
@ -109,24 +114,27 @@ char *EXCEPTIONS[] = {
|
|||
};
|
||||
|
||||
void idt_exception_handler(uint64_t exception, uint64_t code, struct isr_regs *state) {
|
||||
uint64_t cr2;
|
||||
|
||||
switch (exception) {
|
||||
case 0x01: // debug
|
||||
case EX_DEBUG: // debug
|
||||
debugger(state, DEBUG_DBG);
|
||||
return;
|
||||
case 0x03: // breakpoint
|
||||
case EX_BREAKPOINT: // breakpoint
|
||||
debugger(state, DEBUG_INT3);
|
||||
return;
|
||||
case EX_PAGE_FAULT:
|
||||
// page faults store the offending address in cr2
|
||||
__asm__ volatile ("mov %%cr2, %0" : "=r"(cr2));
|
||||
if (!kload_page((void *)cr2))
|
||||
return;
|
||||
}
|
||||
|
||||
kputs("\n\n!!! EXCEPTION !!!\n");
|
||||
kprintf("0x%02lX %s\n", exception, EXCEPTIONS[exception]);
|
||||
kprintf("Error code 0x%lX\n", code);
|
||||
|
||||
|
||||
// page faults store the offending address in cr2
|
||||
if (exception == 0x0E) {
|
||||
uint64_t cr2;
|
||||
__asm__ volatile ("mov %%cr2, %0" : "=r"(cr2));
|
||||
if (exception == EX_PAGE_FAULT) {
|
||||
kprintf("Page fault address: 0x%lX\n", cr2);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -53,7 +53,7 @@ static void set_mode(uint16_t width, uint16_t height, uint16_t bit_depth, int lf
|
|||
(clear ? 0 : DATA_NO_CLEAR_MEM));
|
||||
}
|
||||
|
||||
uint32_t* bochs_init(uint16_t width, uint16_t height, uint8_t bit_depth) {
|
||||
volatile uint32_t* bochs_init(uint16_t width, uint16_t height, uint8_t bit_depth) {
|
||||
|
||||
set_mode(width, height, bit_depth, true, true);
|
||||
|
||||
|
|
|
|||
|
|
@ -68,13 +68,13 @@ struct mboot_tag_mmap {
|
|||
struct mboot_tag_old_rsdp {
|
||||
uint32_t type;
|
||||
uint32_t size;
|
||||
uint8_t rsdp[];
|
||||
char rsdp[];
|
||||
};
|
||||
|
||||
struct mboot_tag_new_rsdp {
|
||||
uint32_t type;
|
||||
uint32_t size;
|
||||
uint8_t rsdp[];
|
||||
char rsdp[];
|
||||
};
|
||||
|
||||
struct mboot_tag_cmdline {
|
||||
|
|
@ -96,11 +96,10 @@ struct mboot_tag_framebuffer {
|
|||
};
|
||||
|
||||
static void read_symbols(
|
||||
struct boot_info *shim_info,
|
||||
struct mboot_tag_elf_sections *sections
|
||||
volatile struct boot_info *shim_info,
|
||||
volatile struct mboot_tag_elf_sections *sections
|
||||
) {
|
||||
|
||||
shim_info->symbol_table = sections->sections;
|
||||
shim_info->symbol_table = (void * volatile) sections->sections;
|
||||
|
||||
// struct mboot_elf_section_header *section =
|
||||
// (struct mboot_elf_section_header *) (layout->elf_section_headers);
|
||||
|
|
@ -136,19 +135,19 @@ static void read_symbols(
|
|||
}
|
||||
|
||||
static void read_cmdline(
|
||||
struct boot_info *shim_info,
|
||||
struct mboot_tag_cmdline *cmdline
|
||||
volatile struct boot_info *shim_info,
|
||||
volatile struct mboot_tag_cmdline *cmdline
|
||||
) {
|
||||
uint32_t size = cmdline->size - 8;
|
||||
if (size >= CMDLINE_MAX)
|
||||
size = CMDLINE_MAX; // truncate :(
|
||||
memcpy(shim_info->cmdline, cmdline->cmdline, size);
|
||||
memcpyv(shim_info->cmdline, cmdline->cmdline, size);
|
||||
shim_info->cmdline[size] = '\0';
|
||||
}
|
||||
|
||||
static void read_framebuffer(
|
||||
struct boot_info *shim_info,
|
||||
struct mboot_tag_framebuffer *framebuffer
|
||||
volatile struct boot_info *shim_info,
|
||||
volatile struct mboot_tag_framebuffer *framebuffer
|
||||
) {
|
||||
shim_info->fb.addr = framebuffer->framebuffer_addr;
|
||||
shim_info->fb.width = framebuffer->framebuffer_width;
|
||||
|
|
@ -168,8 +167,8 @@ static const char *segment_type[] = {
|
|||
};
|
||||
|
||||
static void read_memory_map(
|
||||
struct boot_info *shim_info,
|
||||
struct mboot_tag_mmap *map
|
||||
volatile struct boot_info *shim_info,
|
||||
volatile struct mboot_tag_mmap *map
|
||||
) {
|
||||
int idx = 0;
|
||||
uintptr_t i = (uintptr_t)map->entries;
|
||||
|
|
@ -200,31 +199,31 @@ static void read_memory_map(
|
|||
}
|
||||
|
||||
static void read_old_rsdp(
|
||||
struct boot_info *shim_info,
|
||||
struct mboot_tag_old_rsdp *rsdp
|
||||
volatile struct boot_info *shim_info,
|
||||
volatile struct mboot_tag_old_rsdp *rsdp
|
||||
) {
|
||||
if (shim_info->acpi_table != NULL)
|
||||
return; // xsdp is newer and has been loaded
|
||||
shim_info->acpi_table = rsdp->rsdp;
|
||||
shim_info->acpi_table = (void *volatile) rsdp->rsdp;
|
||||
}
|
||||
|
||||
static void read_new_rsdp(
|
||||
struct boot_info *shim_info,
|
||||
struct mboot_tag_new_rsdp *rsdp
|
||||
volatile struct boot_info *shim_info,
|
||||
volatile struct mboot_tag_new_rsdp *rsdp
|
||||
) {
|
||||
shim_info->acpi_table = rsdp->rsdp;
|
||||
shim_info->acpi_table = (void *volatile) rsdp->rsdp;
|
||||
}
|
||||
|
||||
void mboot_load_info(
|
||||
long mboot_magic,
|
||||
const void *mboot_data_ptr,
|
||||
struct boot_info *shim_info
|
||||
volatile const void *mboot_data_ptr,
|
||||
volatile struct boot_info *shim_info
|
||||
) {
|
||||
|
||||
if (mboot_magic != MBOOT_HEADER_MAGIC)
|
||||
panic("invalid multiboot magic");
|
||||
|
||||
memset(shim_info, 0, sizeof(struct boot_info));
|
||||
memsetv(shim_info, 0, sizeof(struct boot_info));
|
||||
|
||||
struct mboot_info *mboot_info = (struct mboot_info *) mboot_data_ptr;
|
||||
const char *mboot_end = ((char *) mboot_info) + mboot_info->total_size;
|
||||
|
|
|
|||
|
|
@ -8,4 +8,4 @@
|
|||
* @param mboot_info - the pointer passed from multiboot2
|
||||
* @param shim_info - the info to be collected by shim
|
||||
*/
|
||||
void mboot_load_info(long mboot_magic, const void *mboot_info, struct boot_info *shim_info);
|
||||
void mboot_load_info(long mboot_magic, const volatile void *mboot_data_ptr, volatile struct boot_info *shim_info);
|
||||
|
|
|
|||
|
|
@ -54,34 +54,34 @@ struct pte {
|
|||
};
|
||||
|
||||
// bss segment, can write to
|
||||
extern struct pml4e kernel_pml4[512];
|
||||
extern struct pdpte kernel_pdpt_0[512];
|
||||
extern struct pde kernel_pd_0[512];
|
||||
extern struct pte bootstrap_pt[512];
|
||||
extern struct pte paging_pt[512]; // paging_pt should NEVER be outside of this file, NEVER i say
|
||||
extern volatile struct pml4e kernel_pml4[512];
|
||||
extern volatile struct pdpte kernel_pdpt_0[512];
|
||||
extern volatile struct pde kernel_pd_0[512];
|
||||
extern volatile struct pte bootstrap_pt[512];
|
||||
extern volatile struct pte paging_pt[512]; // paging_pt should NEVER be outside of this file, NEVER i say
|
||||
|
||||
// paged address to read page tables
|
||||
// the structures are not gurenteed to be ident mapped
|
||||
// map them here with map_<type>(phys_addr) before useing structures
|
||||
void *addr_mapped = (void *) (uintptr_t) 0x204000;
|
||||
static struct pml4e *pml4_mapped = (void *) (uintptr_t) 0x200000;
|
||||
static struct pdpte *pdpt_mapped = (void *) (uintptr_t) 0x201000;
|
||||
static struct pde *pd_mapped = (void *) (uintptr_t) 0x202000;
|
||||
static struct pte *pt_mapped = (void *) (uintptr_t) 0x203000;
|
||||
void volatile *addr_mapped = (void *) (uintptr_t) 0x204000;
|
||||
static volatile struct pml4e *pml4_mapped = (void *) (uintptr_t) 0x200000;
|
||||
static volatile struct pdpte *pdpt_mapped = (void *) (uintptr_t) 0x201000;
|
||||
static volatile struct pde *pd_mapped = (void *) (uintptr_t) 0x202000;
|
||||
static volatile struct pte *pt_mapped = (void *) (uintptr_t) 0x203000;
|
||||
|
||||
static inline void invlpg(void *addr) {
|
||||
static inline void invlpg(volatile void *addr) {
|
||||
__asm__ volatile("invlpg (%0)" ::"r" (addr) : "memory");
|
||||
}
|
||||
|
||||
static void load_addr(void *phys_addr) {
|
||||
static struct pte *pt = &paging_pt[4];
|
||||
static void load_addr(volatile void *phys_addr) {
|
||||
static volatile struct pte *pt = &paging_pt[4];
|
||||
pt->address = (uint64_t)phys_addr >> 12;
|
||||
pt->flags = F_PRESENT | F_WRITEABLE;
|
||||
invlpg(addr_mapped);
|
||||
}
|
||||
|
||||
static void load_pml4(void *phys) {
|
||||
static struct pte *pt = &paging_pt[0];
|
||||
static void load_pml4(volatile void *phys) {
|
||||
static volatile struct pte *pt = &paging_pt[0];
|
||||
if ((uint64_t)phys >> 12 == pt->address)
|
||||
return;
|
||||
pt->address = (uint64_t)phys >> 12;
|
||||
|
|
@ -89,8 +89,8 @@ static void load_pml4(void *phys) {
|
|||
invlpg(pml4_mapped);
|
||||
}
|
||||
|
||||
static void load_pdpt(void *phys) {
|
||||
static struct pte *pt = &paging_pt[1];
|
||||
static void load_pdpt(volatile void *phys) {
|
||||
static volatile struct pte *pt = &paging_pt[1];
|
||||
if ((uint64_t)phys >> 12 == pt->address)
|
||||
return;
|
||||
pt->address = (uint64_t)phys >> 12;
|
||||
|
|
@ -98,8 +98,8 @@ static void load_pdpt(void *phys) {
|
|||
invlpg(pdpt_mapped);
|
||||
}
|
||||
|
||||
static void load_pd(void *phys) {
|
||||
static struct pte *pt = &paging_pt[2];
|
||||
static void load_pd(volatile void *phys) {
|
||||
static volatile struct pte *pt = &paging_pt[2];
|
||||
if ((uint64_t)phys >> 12 == pt->address)
|
||||
return;
|
||||
pt->address = (uint64_t)phys >> 12;
|
||||
|
|
@ -107,8 +107,8 @@ static void load_pd(void *phys) {
|
|||
invlpg(pd_mapped);
|
||||
}
|
||||
|
||||
static void load_pt(void *phys) {
|
||||
static struct pte *pt = &paging_pt[3];
|
||||
static void load_pt(volatile void *phys) {
|
||||
static volatile struct pte *pt = &paging_pt[3];
|
||||
if ((uint64_t)phys >> 12 == pt->address)
|
||||
return;
|
||||
pt->address = (uint64_t)phys >> 12;
|
||||
|
|
@ -123,13 +123,13 @@ static void load_pt(void *phys) {
|
|||
static int select_pdpt(
|
||||
void *virt,
|
||||
unsigned int flags,
|
||||
struct pml4e *root,
|
||||
struct pdpte **res,
|
||||
volatile struct pml4e *root,
|
||||
volatile struct pdpte **res,
|
||||
bool create
|
||||
) {
|
||||
load_pml4(root);
|
||||
uint64_t offset = (uint64_t)virt >> 39;
|
||||
struct pml4e *pml4e = &pml4_mapped[offset];
|
||||
volatile struct pml4e *pml4e = &pml4_mapped[offset];
|
||||
if (!(pml4e->flags & F_PRESENT)) {
|
||||
if (!create) {
|
||||
return PAG_NOT_PRESENT;
|
||||
|
|
@ -139,26 +139,26 @@ static int select_pdpt(
|
|||
return PAG_CANNOT_ALLOC;
|
||||
}
|
||||
load_addr(new_page);
|
||||
memset(addr_mapped, 0, PAGE_SIZE);
|
||||
memsetv(addr_mapped, 0, PAGE_SIZE);
|
||||
pml4e->address = ((uint64_t)new_page) >> 12;
|
||||
pml4e->flags = F_PRESENT;
|
||||
}
|
||||
if (flags)
|
||||
pml4e->flags = F_PRESENT | flags;
|
||||
*res = (struct pdpte *)(uintptr_t)(pml4e->address << 12);
|
||||
*res = (volatile struct pdpte *)(uintptr_t)(pml4e->address << 12);
|
||||
return PAG_SUCCESS;
|
||||
}
|
||||
|
||||
static int select_pd(
|
||||
void *virt,
|
||||
unsigned int flags,
|
||||
struct pdpte *pdpt,
|
||||
struct pde **res,
|
||||
volatile struct pdpte *pdpt,
|
||||
volatile struct pde **res,
|
||||
bool create
|
||||
) {
|
||||
load_pdpt(pdpt);
|
||||
uint64_t offset = ((uint64_t)virt >> 30) & 0x1ff;
|
||||
struct pdpte *pdpte = &pdpt_mapped[offset];
|
||||
volatile struct pdpte *pdpte = &pdpt_mapped[offset];
|
||||
if (!(pdpte->flags & F_PRESENT)) {
|
||||
if (!create) {
|
||||
return PAG_NOT_PRESENT;
|
||||
|
|
@ -168,26 +168,26 @@ static int select_pd(
|
|||
return PAG_CANNOT_ALLOC;
|
||||
}
|
||||
load_addr(new_page);
|
||||
memset(addr_mapped, 0, PAGE_SIZE);
|
||||
memsetv(addr_mapped, 0, PAGE_SIZE);
|
||||
pdpte->address = ((uint64_t)new_page) >> 12;
|
||||
pdpte->flags = F_PRESENT;
|
||||
}
|
||||
if (flags)
|
||||
pdpte->flags = F_PRESENT | flags;
|
||||
*res = (struct pde *)(uintptr_t)(pdpte->address << 12);
|
||||
*res = (volatile struct pde *)(uintptr_t)(pdpte->address << 12);
|
||||
return PAG_SUCCESS;
|
||||
}
|
||||
|
||||
static int select_pt(
|
||||
void *virt,
|
||||
unsigned int flags,
|
||||
struct pde *pd,
|
||||
struct pte **res,
|
||||
volatile struct pde *pd,
|
||||
volatile struct pte **res,
|
||||
bool create
|
||||
) {
|
||||
load_pd(pd);
|
||||
uint64_t offset = ((uint64_t)virt >> 21) & 0x1ff;
|
||||
struct pde *pde = &pd_mapped[offset];
|
||||
volatile struct pde *pde = &pd_mapped[offset];
|
||||
if (!(pde->flags & F_PRESENT)) {
|
||||
if (!create) {
|
||||
return PAG_NOT_PRESENT;
|
||||
|
|
@ -197,24 +197,24 @@ static int select_pt(
|
|||
return PAG_CANNOT_ALLOC;
|
||||
}
|
||||
load_addr(new_page);
|
||||
memset(addr_mapped, 0, PAGE_SIZE);
|
||||
memsetv(addr_mapped, 0, PAGE_SIZE);
|
||||
pde->address = ((uint64_t)new_page) >> 12;
|
||||
pde->flags = F_PRESENT;
|
||||
}
|
||||
if (flags)
|
||||
pde->flags = F_PRESENT | flags;
|
||||
*res = (struct pte *)(uintptr_t)(pde->address << 12);
|
||||
*res = (volatile struct pte *)(uintptr_t)(pde->address << 12);
|
||||
return PAG_SUCCESS;
|
||||
}
|
||||
|
||||
static void select_page(
|
||||
void *virt,
|
||||
struct pte *pt,
|
||||
struct pte **res
|
||||
volatile struct pte *pt,
|
||||
volatile struct pte **res
|
||||
) {
|
||||
load_pt(pt);
|
||||
uint64_t offset = ((uint64_t)virt >> 12) & 0x1ff;
|
||||
struct pte *page = &pt_mapped[offset];
|
||||
volatile struct pte *page = &pt_mapped[offset];
|
||||
*res = page;
|
||||
return;
|
||||
}
|
||||
|
|
@ -275,13 +275,13 @@ static inline void try_unmap_pt(void) {
|
|||
}
|
||||
|
||||
static void unmap_page(
|
||||
struct pml4e *root,
|
||||
volatile struct pml4e *root,
|
||||
void *virt
|
||||
) {
|
||||
struct pdpte *pdpt;
|
||||
struct pde *pd;
|
||||
struct pte *pt;
|
||||
struct pte *page;
|
||||
volatile struct pdpte *pdpt;
|
||||
volatile struct pde *pd;
|
||||
volatile struct pte *pt;
|
||||
volatile struct pte *page;
|
||||
|
||||
unsigned int df = 0;
|
||||
|
||||
|
|
@ -308,7 +308,7 @@ static void unmap_page(
|
|||
}
|
||||
|
||||
static void unmap_pages(
|
||||
struct pml4e *root,
|
||||
volatile struct pml4e *root,
|
||||
void *virt_start,
|
||||
long page_count
|
||||
) {
|
||||
|
|
@ -320,10 +320,10 @@ static void unmap_pages(
|
|||
pdpt_n,
|
||||
pd_n;
|
||||
|
||||
struct pdpte *pdpt = NULL;
|
||||
struct pde *pd = NULL;
|
||||
struct pte *pt = NULL;
|
||||
struct pte *page = NULL;
|
||||
volatile struct pdpte *pdpt = NULL;
|
||||
volatile struct pde *pd = NULL;
|
||||
volatile struct pte *pt = NULL;
|
||||
volatile struct pte *page = NULL;
|
||||
|
||||
unsigned int df = 0;
|
||||
|
||||
|
|
@ -372,14 +372,14 @@ static void unmap_pages(
|
|||
return;
|
||||
}
|
||||
|
||||
static struct pte *get_page(
|
||||
struct pml4e *root,
|
||||
static volatile struct pte *get_page(
|
||||
volatile struct pml4e *root,
|
||||
void *virt
|
||||
) {
|
||||
struct pdpte *pdpt;
|
||||
struct pde *pd;
|
||||
struct pte *pt;
|
||||
struct pte *page;
|
||||
volatile struct pdpte *pdpt;
|
||||
volatile struct pde *pd;
|
||||
volatile struct pte *pt;
|
||||
volatile struct pte *page;
|
||||
|
||||
unsigned int df = 0;
|
||||
|
||||
|
|
@ -398,15 +398,15 @@ static struct pte *get_page(
|
|||
}
|
||||
|
||||
static int map_page(
|
||||
struct pml4e *root,
|
||||
volatile struct pml4e *root,
|
||||
void *virt,
|
||||
void *phys,
|
||||
unsigned int flags
|
||||
) {
|
||||
struct pdpte *pdpt;
|
||||
struct pde *pd;
|
||||
struct pte *pt;
|
||||
struct pte *page;
|
||||
volatile struct pdpte *pdpt;
|
||||
volatile struct pde *pd;
|
||||
volatile struct pte *pt;
|
||||
volatile struct pte *page;
|
||||
|
||||
unsigned int df = F_WRITEABLE;
|
||||
|
||||
|
|
@ -439,7 +439,7 @@ static int map_page(
|
|||
}
|
||||
|
||||
static int map_pages(
|
||||
struct pml4e *root,
|
||||
volatile struct pml4e *root,
|
||||
void *virt_start,
|
||||
void *phys_start,
|
||||
unsigned int flags,
|
||||
|
|
@ -453,10 +453,10 @@ static int map_pages(
|
|||
pdpt_n,
|
||||
pd_n;
|
||||
|
||||
struct pdpte *pdpt = NULL;
|
||||
struct pde *pd = NULL;
|
||||
struct pte *pt = NULL;
|
||||
struct pte *page = NULL;
|
||||
volatile struct pdpte *pdpt = NULL;
|
||||
volatile struct pde *pd = NULL;
|
||||
volatile struct pte *pt = NULL;
|
||||
volatile struct pte *page = NULL;
|
||||
|
||||
void *virt, *phys;
|
||||
|
||||
|
|
@ -533,8 +533,8 @@ void paging_init(void) {
|
|||
kernel_pd_0[2].flags = F_PRESENT | F_WRITEABLE;
|
||||
kernel_pd_0[2].address = (uint64_t)(&bootstrap_pt) >> 12;
|
||||
|
||||
memset(&paging_pt, 0, 4096);
|
||||
memset(&bootstrap_pt, 0, 4096);
|
||||
memsetv(&paging_pt, 0, 4096);
|
||||
memsetv(&bootstrap_pt, 0, 4096);
|
||||
}
|
||||
|
||||
static inline void *page_align(void *addr) {
|
||||
|
|
@ -577,15 +577,17 @@ void *alloc_pages(int count) {
|
|||
void *virt = virtaddr_alloc(count);
|
||||
if (virt == NULL)
|
||||
return NULL;
|
||||
void *phys = alloc_phys_pages(count);
|
||||
if (phys == NULL) {
|
||||
virtaddr_free(virt);
|
||||
return NULL;
|
||||
}
|
||||
//void *phys = alloc_phys_pages(count);
|
||||
//if (phys == NULL) {
|
||||
// virtaddr_free(virt);
|
||||
// return NULL;
|
||||
//}
|
||||
if (map_pages(
|
||||
kernel_pml4,
|
||||
virt,
|
||||
phys,
|
||||
//phys,
|
||||
//F_WRITEABLE,
|
||||
NULL,
|
||||
F_WRITEABLE,
|
||||
count
|
||||
)) {
|
||||
|
|
@ -625,7 +627,7 @@ int kunmap_page(void *virt_addr) {
|
|||
}
|
||||
|
||||
int kload_page(void *virt_addr) {
|
||||
struct pte *page = get_page(kernel_pml4, virt_addr);
|
||||
volatile struct pte *page = get_page(kernel_pml4, virt_addr);
|
||||
if (page == NULL)
|
||||
return -1;
|
||||
if (page->loaded)
|
||||
|
|
@ -636,8 +638,7 @@ int kload_page(void *virt_addr) {
|
|||
return -2;
|
||||
page->loaded = 1;
|
||||
page->address = (uint64_t)phys >> 12;
|
||||
page->flags |= F_PRESENT | F_WRITEABLE;
|
||||
page->flags |= F_PRESENT;
|
||||
invlpg(virt_addr);
|
||||
__asm__ volatile ("movq %cr3, %rax; movq %rax, %cr3;");
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -11,9 +11,10 @@
|
|||
|
||||
static struct boot_info boot_info;
|
||||
|
||||
void *amd64_shim(long mboot_magic, void *mboot_data_ptr) {
|
||||
void *amd64_shim(long mboot_magic, volatile void *mboot_data_ptr) {
|
||||
serial_init();
|
||||
paging_init();
|
||||
serial_out_str("aaaa\n");
|
||||
pic_remap();
|
||||
idt_init();
|
||||
|
||||
|
|
@ -21,5 +22,3 @@ void *amd64_shim(long mboot_magic, void *mboot_data_ptr) {
|
|||
|
||||
return &boot_info;
|
||||
}
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -17,6 +17,7 @@ void kmain(struct boot_info *info) {
|
|||
|
||||
kprintf("enterd kmain\n");
|
||||
|
||||
// pages are allocated on write :3
|
||||
char *test = kalloc(5);
|
||||
*test = 1;
|
||||
|
||||
|
|
|
|||
15
src/lib.c
15
src/lib.c
|
|
@ -15,6 +15,13 @@ void *memcpy(void *restrict dest, const void *restrict src, unsigned long n) {
|
|||
return dest;
|
||||
}
|
||||
|
||||
volatile void *memcpyv(volatile void *dest, const volatile void *src, unsigned long n) {
|
||||
volatile char *d = dest;
|
||||
const volatile char *s = src;
|
||||
for (; n; n--) *d++ = *s++;
|
||||
return dest;
|
||||
}
|
||||
|
||||
void *memmove(void *dest, const void *src, unsigned long n) {
|
||||
char *d = dest;
|
||||
const char *s = src;
|
||||
|
|
@ -38,6 +45,14 @@ void *memset(void *restrict dest, int c, unsigned long n) {
|
|||
return dest;
|
||||
}
|
||||
|
||||
volatile void *memsetv(volatile void *dest, int c, unsigned long n) {
|
||||
volatile unsigned char *d = dest;
|
||||
for (; n; n--) {
|
||||
*d++ = c;
|
||||
};
|
||||
return dest;
|
||||
}
|
||||
|
||||
int strncmp(const char *restrict lhs, const char *restrict rhs, unsigned long n) {
|
||||
const unsigned char *l=(void *)lhs, *r=(void *)rhs;
|
||||
if (!n--) return 0;
|
||||
|
|
|
|||
|
|
@ -51,7 +51,6 @@ void *kalloc_new(size_t size) {
|
|||
node = 0;
|
||||
}
|
||||
|
||||
memcpy(addr, 0, pages * PAGE_SIZE);
|
||||
struct page_header *header = addr;
|
||||
header->magic = 0xBEEFCAFE;
|
||||
header->used = size;
|
||||
|
|
|
|||
29
src/screen.c
29
src/screen.c
|
|
@ -20,7 +20,7 @@ struct hsv {
|
|||
uint16_t v;
|
||||
};
|
||||
|
||||
static uint32_t *buffer = NULL;
|
||||
static volatile uint32_t *buffer = NULL;
|
||||
static uint32_t width, height;
|
||||
static uint8_t bit_depth;
|
||||
|
||||
|
|
@ -39,7 +39,12 @@ static float fabs(float f) {
|
|||
return f > 0 ? f : -f;
|
||||
}
|
||||
|
||||
static struct rgb htor(struct hsv hsv) {
|
||||
static struct rgb gethsv(uint16_t a, uint16_t xp, uint16_t yp) {
|
||||
struct hsv hsv = {
|
||||
.h = a,
|
||||
.s = xp * 100.0 / width,
|
||||
.v = (height - yp) * 100.0 / height,
|
||||
};
|
||||
struct rgb rgb;
|
||||
float s = hsv.s / 100.0;
|
||||
float v = hsv.v / 100.0;
|
||||
|
|
@ -69,14 +74,16 @@ static struct rgb htor(struct hsv hsv) {
|
|||
return rgb;
|
||||
}
|
||||
|
||||
static struct rgb get_color(uint16_t a, uint16_t x, uint16_t y) {
|
||||
struct hsv hsv = {
|
||||
.h = a,
|
||||
.s = x * 100.0 / width,
|
||||
.v = y * 100.0 / height,
|
||||
};
|
||||
return htor(hsv);
|
||||
}
|
||||
//static struct rgb getsrgb(uint16_t x, uint16_t y) {
|
||||
// struct rgb color;// = get_color(angle, x, height - y);
|
||||
// double _x = (double) x / width;
|
||||
// double _y = (double) y / height;
|
||||
// double _z = (2 - _x - _y) / 2;
|
||||
// color.r = _x * 255;
|
||||
// color.g = _y * 255;
|
||||
// color.b = _z * 255;
|
||||
// return color;
|
||||
//}
|
||||
|
||||
void screen_init(void) {
|
||||
angle = 0;
|
||||
|
|
@ -89,7 +96,7 @@ void screen_init(void) {
|
|||
void screen_redraw(void) {
|
||||
for (uint16_t y = 0; y < height; y++) {
|
||||
for (uint16_t x = 0; x < width; x++) {
|
||||
struct rgb color = get_color(angle, x, height - y);
|
||||
struct rgb color = gethsv(angle, x, y);
|
||||
set_pixel(color, x, y);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue