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-rw-r--r--arch/i386/include/kernel/asm.h84
-rw-r--r--arch/i386/include/kernel/idt.h1
-rw-r--r--arch/i386/include/kernel/isr.h78
-rw-r--r--arch/i386/include/kernel/keyboard.h3
-rw-r--r--arch/i386/include/kernel/paging.h18
-rw-r--r--arch/i386/include/kernel/pic.h17
-rw-r--r--arch/i386/include/kernel/syscall.h8
-rw-r--r--arch/i386/include/kernel/timer.h4
-rw-r--r--arch/i386/kernel/gdt.c (renamed from arch/i386/boot/gdt.c)0
-rw-r--r--arch/i386/kernel/idt.c (renamed from arch/i386/boot/idt.c)42
-rw-r--r--arch/i386/kernel/isr.s (renamed from arch/i386/boot/isr.s)0
-rw-r--r--arch/i386/kernel/keyboard.c8
-rw-r--r--arch/i386/kernel/paging.c78
-rw-r--r--arch/i386/kernel/pic.c16
-rw-r--r--arch/i386/kernel/syscall.c48
-rw-r--r--arch/i386/kernel/timer.c6
-rw-r--r--arch/i386/make.config6
-rw-r--r--include/kernel/mem.h1
-rw-r--r--include/kernel/panic.h6
-rw-r--r--kernel/panic.c22
20 files changed, 218 insertions, 228 deletions
diff --git a/arch/i386/include/kernel/asm.h b/arch/i386/include/kernel/asm.h
index 33ec3d7..615da74 100644
--- a/arch/i386/include/kernel/asm.h
+++ b/arch/i386/include/kernel/asm.h
@@ -1,6 +1,90 @@
#ifndef I386_ASM_H
#define I386_ASM_H
+#include <stdint.h>
+
+struct regs {
+ uint32_t cr4;
+ uint32_t cr3;
+ uint32_t cr2;
+ uint32_t cr0;
+
+ uint32_t edi;
+ uint32_t esi;
+ uint32_t edx;
+ uint32_t ecx;
+ uint32_t ebx;
+ uint32_t eax;
+
+ uint32_t isr_vector;
+ uint32_t isr_err;
+ uint32_t eip;
+ uint32_t cs;
+ uint32_t eflags;
+} __attribute__((packed));
+
+void isr_stub_0(void);
+void isr_stub_1(void);
+void isr_stub_2(void);
+void isr_stub_3(void);
+void isr_stub_4(void);
+void isr_stub_5(void);
+void isr_stub_6(void);
+void isr_stub_7(void);
+void isr_stub_8(void);
+void isr_stub_9(void);
+void isr_stub_10(void);
+void isr_stub_11(void);
+void isr_stub_12(void);
+void isr_stub_13(void);
+void isr_stub_14(void);
+void isr_stub_15(void);
+void isr_stub_16(void);
+void isr_stub_17(void);
+void isr_stub_18(void);
+void isr_stub_19(void);
+void isr_stub_20(void);
+void isr_stub_21(void);
+void isr_stub_22(void);
+void isr_stub_23(void);
+void isr_stub_24(void);
+void isr_stub_25(void);
+void isr_stub_26(void);
+void isr_stub_27(void);
+void isr_stub_28(void);
+void isr_stub_29(void);
+void isr_stub_30(void);
+void isr_stub_31(void);
+
+void irq_stub_0(void);
+void irq_stub_1(void);
+void irq_stub_2(void);
+void irq_stub_3(void);
+void irq_stub_4(void);
+void irq_stub_5(void);
+void irq_stub_6(void);
+void irq_stub_7(void);
+void irq_stub_8(void);
+void irq_stub_9(void);
+void irq_stub_10(void);
+void irq_stub_11(void);
+void irq_stub_12(void);
+void irq_stub_13(void);
+void irq_stub_14(void);
+void irq_stub_15(void);
+
+void syscall_stub(void);
+
+static inline void outb(uint16_t port, uint8_t value) {
+ __asm__ volatile("outb %0, %1" : : "a"(value), "Nd"(port));
+}
+
+static inline uint8_t inb(uint16_t port) {
+ uint8_t ret;
+ __asm__ volatile("inb %1, %0" : "=a"(ret) : "Nd"(port));
+ return ret;
+}
+
static inline void enable_ints(void) {
__asm__ volatile("sti");
return;
diff --git a/arch/i386/include/kernel/idt.h b/arch/i386/include/kernel/idt.h
index 6873a3b..29ec39f 100644
--- a/arch/i386/include/kernel/idt.h
+++ b/arch/i386/include/kernel/idt.h
@@ -3,7 +3,6 @@
#include <stdint.h>
-// IDT Flags
#define SEGMENT_PRESENT 0x80
#define SEGMENT_RING0 0x00
#define SEGMENT_RING3 0x60
diff --git a/arch/i386/include/kernel/isr.h b/arch/i386/include/kernel/isr.h
deleted file mode 100644
index 4e21f8f..0000000
--- a/arch/i386/include/kernel/isr.h
+++ /dev/null
@@ -1,78 +0,0 @@
-#ifndef I386_ISR_H
-#define I386_ISR_H
-
-#include <stdint.h>
-
-struct isr_frame {
- uint32_t cr4;
- uint32_t cr3;
- uint32_t cr2;
- uint32_t cr0;
-
- uint32_t edi;
- uint32_t esi;
- uint32_t edx;
- uint32_t ecx;
- uint32_t ebx;
- uint32_t eax;
-
- uint32_t vector;
- uint32_t errno;
- uint32_t eip;
- uint32_t cs;
- uint32_t eflags;
-} __attribute__((packed));
-
-extern void isr_stub_0(void);
-extern void isr_stub_1(void);
-extern void isr_stub_2(void);
-extern void isr_stub_3(void);
-extern void isr_stub_4(void);
-extern void isr_stub_5(void);
-extern void isr_stub_6(void);
-extern void isr_stub_7(void);
-extern void isr_stub_8(void);
-extern void isr_stub_9(void);
-extern void isr_stub_10(void);
-extern void isr_stub_11(void);
-extern void isr_stub_12(void);
-extern void isr_stub_13(void);
-extern void isr_stub_14(void);
-extern void isr_stub_15(void);
-extern void isr_stub_16(void);
-extern void isr_stub_17(void);
-extern void isr_stub_18(void);
-extern void isr_stub_19(void);
-extern void isr_stub_20(void);
-extern void isr_stub_21(void);
-extern void isr_stub_22(void);
-extern void isr_stub_23(void);
-extern void isr_stub_24(void);
-extern void isr_stub_25(void);
-extern void isr_stub_26(void);
-extern void isr_stub_27(void);
-extern void isr_stub_28(void);
-extern void isr_stub_29(void);
-extern void isr_stub_30(void);
-extern void isr_stub_31(void);
-
-extern void irq_stub_0(void);
-extern void irq_stub_1(void);
-extern void irq_stub_2(void);
-extern void irq_stub_3(void);
-extern void irq_stub_4(void);
-extern void irq_stub_5(void);
-extern void irq_stub_6(void);
-extern void irq_stub_7(void);
-extern void irq_stub_8(void);
-extern void irq_stub_9(void);
-extern void irq_stub_10(void);
-extern void irq_stub_11(void);
-extern void irq_stub_12(void);
-extern void irq_stub_13(void);
-extern void irq_stub_14(void);
-extern void irq_stub_15(void);
-
-extern void syscall_stub(void);
-
-#endif
diff --git a/arch/i386/include/kernel/keyboard.h b/arch/i386/include/kernel/keyboard.h
index 8f39a70..7b63993 100644
--- a/arch/i386/include/kernel/keyboard.h
+++ b/arch/i386/include/kernel/keyboard.h
@@ -1,7 +1,6 @@
#ifndef I386_KEYBOARD_H
#define I386_KEYBOARD_H
-#include <kernel/isr.h>
#include <stdint.h>
#define KB_STAT 0x64
@@ -28,6 +27,6 @@
#define KB_DEL 0xE9
char keyboard_getchar(void);
-void keyboard_handler(struct isr_frame *frame);
+void keyboard_handler(void);
#endif
diff --git a/arch/i386/include/kernel/paging.h b/arch/i386/include/kernel/paging.h
index bb79d09..7f820e8 100644
--- a/arch/i386/include/kernel/paging.h
+++ b/arch/i386/include/kernel/paging.h
@@ -1,7 +1,7 @@
#ifndef I386_PAGING_H
#define I386_PAGING_H
-#include <kernel/isr.h>
+#include <kernel/asm.h>
#include <kernel/multiboot.h>
#include <kernel/data/list.h>
#include <stdint.h>
@@ -25,21 +25,11 @@
#define PAGE_SIZE 4096
-#define DMA_BITMAP_SZ 128
-#define BDY_BITMAP_SZ 32640
-
-struct pfa_buddy {
- uintptr_t start;
- uintptr_t *bitmap;
- uint8_t size;
- struct list_head list;
-};
-
-void load_page_dir(uintptr_t pd_addr);
-void enable_paging(void);
+uint32_t* init_page_table(uint32_t flags);
+void enable_paging(uintptr_t pd_addr);
void paging_init(void);
-void page_fault_handler(struct isr_frame *frame);
+void page_fault_handler(struct regs *regs);
uint32_t get_vaddr(uintptr_t paddr);
diff --git a/arch/i386/include/kernel/pic.h b/arch/i386/include/kernel/pic.h
index ca3cc99..2b757ee 100644
--- a/arch/i386/include/kernel/pic.h
+++ b/arch/i386/include/kernel/pic.h
@@ -1,8 +1,7 @@
#ifndef I386_PIC_H
#define I386_PIC_H
-#include <kernel/isr.h>
-#include <kernel/idt.h>
+#include <kernel/asm.h>
#include <stdint.h>
#define PIC1 0x20
@@ -27,16 +26,6 @@
#define PIC_READ_IRR 0x0A
#define PIC_READ_ISR 0x0B
-static inline void outb(uint16_t port, uint8_t value) {
- __asm__ volatile("outb %0, %1" : : "a"(value), "Nd"(port));
-}
-
-static inline uint8_t inb(uint16_t port) {
- uint8_t ret;
- __asm__ volatile("inb %1, %0" : "=a"(ret) : "Nd"(port));
- return ret;
-}
-
static inline void io_wait(void) {
outb(0x80, 0);
}
@@ -46,8 +35,8 @@ void pic_remap(void);
uint16_t pic_get_irr(void);
uint16_t pic_get_isr(void);
-void register_irq_handler(uint8_t irq, void (*handler)(struct isr_frame *frame));
-void irq_dispatch(struct isr_frame *frame);
+void register_irq_handler(uint8_t irq, void (*handler)(struct regs *regs));
+void irq_dispatch(struct regs *regs);
void irq_set_mask(uint8_t irq);
void irq_clear_mask(uint8_t irq);
diff --git a/arch/i386/include/kernel/syscall.h b/arch/i386/include/kernel/syscall.h
index 788e5da..88ee59a 100644
--- a/arch/i386/include/kernel/syscall.h
+++ b/arch/i386/include/kernel/syscall.h
@@ -1,7 +1,8 @@
#ifndef I386_SYSCALL_H
#define I386_SYSCALL_H
-#include <kernel/isr.h>
+#include <kernel/asm.h>
+#include <stdint.h>
#include <stddef.h>
// Unix standard calls
@@ -23,11 +24,10 @@
#define SYS_LINK 16
#define SYS_MKDIR 17
#define SYS_CLOSE 18
+#define SYS_EXEC 19
#define SYS_REBOOT 88
-int handle_syscall(struct isr_frame *frame);
-void dump_reg(struct isr_frame *frame);
-void dump_stack(uintptr_t esp, size_t len);
+int handle_syscall(struct regs *regs);
#endif
diff --git a/arch/i386/include/kernel/timer.h b/arch/i386/include/kernel/timer.h
index 0d90369..1bc2855 100644
--- a/arch/i386/include/kernel/timer.h
+++ b/arch/i386/include/kernel/timer.h
@@ -1,9 +1,9 @@
#ifndef I386_TIMER_H
#define I386_TIMER_H
-#include <kernel/isr.h>
+#include <kernel/asm.h>
-void timer_handler(struct isr_frame *frame);
+void timer_handler(struct regs *regs);
void timer_init(void);
#endif
diff --git a/arch/i386/boot/gdt.c b/arch/i386/kernel/gdt.c
index c0cf127..c0cf127 100644
--- a/arch/i386/boot/gdt.c
+++ b/arch/i386/kernel/gdt.c
diff --git a/arch/i386/boot/idt.c b/arch/i386/kernel/idt.c
index 7b9401d..5c0766c 100644
--- a/arch/i386/boot/idt.c
+++ b/arch/i386/kernel/idt.c
@@ -1,7 +1,8 @@
+#include <kernel/idt.h>
#include <kernel/syscall.h>
#include <kernel/panic.h>
#include <kernel/gdt.h>
-#include <kernel/isr.h>
+#include <kernel/asm.h>
#include <kernel/io.h>
#include <kernel/pic.h>
#include <kernel/string.h>
@@ -44,51 +45,40 @@ const char* exceptions[] = {
"RESERVED"
};
-__attribute__((noreturn))
-void halt_catch_fire(struct isr_frame *frame) {
- dump_reg(frame);
- kprintf("ERRNO=%x\n", frame->errno);
- __asm__ volatile("cli;hlt");
- while (1);
-}
-
-void exception_handler(struct isr_frame *frame) {
- switch (frame->vector) {
+void exception_handler(struct regs *regs) {
+ switch (regs->isr_vector) {
case 0x00:
panic("Division by zero in kernel address space");
- halt_catch_fire(frame);
+ break;
case 0x06:
panic("Invalid opcode in kernel address space");
- halt_catch_fire(frame);
+ break;
case 0x08:
panic("Double fault in interrupt handler");
- halt_catch_fire(frame);
+ break;
case 0x0D:
panic("Protection fault in kernel address space");
- halt_catch_fire(frame);
+ break;
case 0x0E:
- page_fault_handler(frame);
+ page_fault_handler(regs);
break;
default:
panic("Unhandled exception");
- halt_catch_fire(frame);
}
}
-void interrupt_handler(struct isr_frame frame) {
- if (frame.vector < 32) {
- exception_handler(&frame);
- } else if (frame.vector < 48) {
- irq_dispatch(&frame);
+void interrupt_handler(struct regs regs) {
+ if (regs.isr_vector < 32) {
+ exception_handler(&regs);
+ } else if (regs.isr_vector < 48) {
+ irq_dispatch(&regs);
} else {
- switch (frame.vector) {
+ switch (regs.isr_vector) {
case 0x80:
- handle_syscall(&frame);
+ handle_syscall(&regs);
break;
default:
panic("Unmapped interrupt");
- halt_catch_fire(&frame);
- __asm__ volatile("cli;hlt");
}
}
}
diff --git a/arch/i386/boot/isr.s b/arch/i386/kernel/isr.s
index 55db35e..55db35e 100644
--- a/arch/i386/boot/isr.s
+++ b/arch/i386/kernel/isr.s
diff --git a/arch/i386/kernel/keyboard.c b/arch/i386/kernel/keyboard.c
index 4e4bc9b..96aea3a 100644
--- a/arch/i386/kernel/keyboard.c
+++ b/arch/i386/kernel/keyboard.c
@@ -100,6 +100,9 @@ static uint8_t* keymaps[4] = {
keymap_control,
};
+char keyboard_buffer[4096];
+int kbuf_pos = 0;
+
char keyboard_getchar(void) {
static int shift = 0;
uint8_t st = inb(KB_STAT);
@@ -133,10 +136,9 @@ char keyboard_getchar(void) {
return c;
}
-void keyboard_handler(struct isr_frame *frame) {
+void keyboard_handler(void) {
char c = keyboard_getchar();
- // TODO: actually put this in a buffer
if (c != -1)
- fb_putchar(c);
+ keyboard_buffer[kbuf_pos++];
return;
}
diff --git a/arch/i386/kernel/paging.c b/arch/i386/kernel/paging.c
index 54539ac..b2a1392 100644
--- a/arch/i386/kernel/paging.c
+++ b/arch/i386/kernel/paging.c
@@ -10,63 +10,42 @@ static uintptr_t kend = (uintptr_t)&_kernel_end - 0xC0000000;
static uintptr_t page_directory[1024] __attribute__((aligned(PAGE_SIZE)));
static uintptr_t first_page_table[1024] __attribute__((aligned(PAGE_SIZE)));
+static uintptr_t second_page_table[1024] __attribute__((aligned(PAGE_SIZE)));
static int paging_enabled = 0;
-static uint32_t dma_zone_bitmap[DMA_BITMAP_SZ];
-static uint32_t buddy_bitmap[BDY_BITMAP_SZ];
-static struct pfa_buddy first_buddy;
-
-static void _pfa_init(void) {
- first_buddy.start = 0x01000000;
- first_buddy.bitmap = buddy_bitmap;
+uint32_t* init_page_table(uint32_t flags) {
+ uint32_t *ret = kmalloc(sizeof(uint32_t)*1024);
+ for (int i = 0; i < 1024; i++)
+ ret[i] = flags;
}
-static void _pfa_alloc(uintptr_t paddr) {
- uintptr_t index = (paddr & 0xFFFFF000) / 4096 / 32;
- uintptr_t bit = (paddr & 0xFFFFF000) / 4096 % 32;
- uint32_t *bitmap;
- if (paddr < 0x01000000)
- bitmap = dma_zone_bitmap;
- else
- bitmap = first_buddy.bitmap;
-
- bitmap[index] |= (1 << bit);
-}
-
-static void _pfa_free(uintptr_t paddr) {
- uintptr_t index = (paddr & 0xFFFFF000) / 4096 / 32;
- uintptr_t bit = (paddr & 0xFFFFF000) / 4096 % 32;
- uint32_t *bitmap;
- if (paddr < 0x01000000)
- bitmap = dma_zone_bitmap;
- else
- bitmap = first_buddy.bitmap;
-
- bitmap[index] &= ~(1 << bit);
+uint32_t* init_page_dir(uint32_t flags) {
+ uint32_t *ret = init_page_table(flags);
+ ret[0] = ((uintptr_t)&first_page_table - 0xC0000000) | 3;
+ ret[768] = ((uintptr_t)&second_page_table - 0xC0000000) | 3;
}
void paging_init(void) {
- _pfa_init();
- for (int i = 0; i < 1024; i++)
- page_directory[i] = 0x00000002;
+ for (int i = 0; i < 1024; i++) {
+ page_directory[i] = PD_RW;
+ first_page_table[i] = PD_RW;
+ second_page_table[i] = PD_RW;
+ }
page_directory[1023] = ((uintptr_t)&page_directory - 0xC0000000) | 3;
page_directory[0] = ((uintptr_t)&first_page_table - 0xC0000000) | 3;
- page_directory[768] = ((uintptr_t)&first_page_table - 0xC0000000) | 3;
- for (uintptr_t i = kstart; i < kend; i += 4096) {
- _pfa_alloc(get_vaddr(i));
- map_page(page_directory, i, get_vaddr(i), 0x003);
- }
+ page_directory[768] = ((uintptr_t)&second_page_table - 0xC0000000) | 3;
+ for (uintptr_t i = kstart; i < kend; i += PAGE_SIZE)
+ map_page(page_directory, i, i + 0xC0000000, 0x003);
- load_page_dir(((uintptr_t)&page_directory) - 0xC0000000);
- enable_paging();
+ enable_paging(((uintptr_t)&page_directory) - 0xC0000000);
paging_enabled = 1;
return;
}
-void page_fault_handler(struct isr_frame *frame) {
- uintptr_t errno = frame->errno;
+void page_fault_handler(struct regs *regs) {
+ uintptr_t errno = regs->isr_err;
uintptr_t fault_addr;
__asm__ volatile("movl %%cr2, %0" : "=r"(fault_addr));
@@ -76,9 +55,9 @@ void page_fault_handler(struct isr_frame *frame) {
int reserved = errno & ERR_RESERVED;
int ifetch = errno & ERR_INST;
+ uintptr_t first_free;
if (!present)
- _pfa_alloc(fault_addr);
- map_page(NULL, fault_addr, fault_addr, 0x003);
+ map_page(regs->cr3, fault_addr, fault_addr, PD_PRES | PD_RW | PD_USR);
if (user)
panic("Usermode attempted to read supervisor page");
if (rw)
@@ -89,8 +68,17 @@ void page_fault_handler(struct isr_frame *frame) {
panic("Task paging instruction fetch failure");
}
-uintptr_t get_vaddr(uintptr_t paddr) {
- return paddr + 0xC0000000;
+uintptr_t get_paddr(uintptr_t vaddr) {
+ uint32_t pdindex = (uint32_t)vaddr >> 22;
+ uint32_t ptindex = (uint32_t)vaddr >> 12 & 0x03FF;
+
+ uint32_t *pd = (uint32_t*)0xFFFFF000;
+ if (*pd & PD_PRES != 1)
+ return NULL;
+ uint32_t *pt = ((uint32_t*)0xFFC00000) + (0x400 * pdindex);
+ if (*pt & PD_PRES != 1)
+ return NULL;
+ return (uintptr_t)((pt[ptindex] & ~0xFFF) + ((uint32_t)vaddr & 0xFFF));
}
void map_page(uint32_t *pd, uintptr_t paddr, uintptr_t vaddr, uint32_t flags) {
diff --git a/arch/i386/kernel/pic.c b/arch/i386/kernel/pic.c
index 7a51763..3cf1d94 100644
--- a/arch/i386/kernel/pic.c
+++ b/arch/i386/kernel/pic.c
@@ -1,6 +1,6 @@
#include <kernel/pic.h>
-static void (*irq_handlers[16])(struct isr_frame *frame);
+static void (*irq_handlers[16])(struct regs *regs);
void pic_eoi(uint8_t irq) {
if (irq >= 8)
@@ -24,27 +24,27 @@ void pic_remap(void) {
outb(PIC2_DATA, a2);
}
-static uint16_t __pic_get_irq_reg(int ocw3) {
+static uint16_t _pic_get_irq_reg(int ocw3) {
outb(PIC1_COMMAND, ocw3);
outb(PIC2_COMMAND, ocw3);
return (inb(PIC2_COMMAND) << 8) | inb(PIC1_COMMAND);
}
uint16_t pic_get_irr(void) {
- return __pic_get_irq_reg(PIC_READ_IRR);
+ return _pic_get_irq_reg(PIC_READ_IRR);
}
uint16_t pic_get_isr(void) {
- return __pic_get_irq_reg(PIC_READ_ISR);
+ return _pic_get_irq_reg(PIC_READ_ISR);
}
-void register_irq_handler(uint8_t irq, void (*handler)(struct isr_frame *frame)) {
+void register_irq_handler(uint8_t irq, void (*handler)(struct regs *regs)) {
irq_handlers[irq] = handler;
}
-void irq_dispatch(struct isr_frame *frame) {
- (*irq_handlers[frame->vector-32])(frame);
- pic_eoi(frame->vector-32);
+void irq_dispatch(struct regs *regs) {
+ (*irq_handlers[regs->isr_vector-32])(regs);
+ pic_eoi(regs->isr_vector-32);
return;
}
diff --git a/arch/i386/kernel/syscall.c b/arch/i386/kernel/syscall.c
index 7bdb24b..27e1c60 100644
--- a/arch/i386/kernel/syscall.c
+++ b/arch/i386/kernel/syscall.c
@@ -1,32 +1,36 @@
#include <kernel/syscall.h>
+#include <kernel/panic.h>
+#include <kernel/framebuffer.h>
+#include <kernel/keyboard.h>
+#include <kernel/string.h>
#include <kernel/io.h>
#include <stddef.h>
-int handle_syscall(struct isr_frame *frame) {
- switch (frame->eax) {
- case SYS_REBOOT:
- kprintf("REBOOT NOT SUPPORTED\n");
- break;
- default:
- kprintf("Error: Invalid system call number: %d\n", frame->eax);
- halt_catch_fire(frame);
+extern char *keyboard_buffer;
+extern uint32_t kbuf_pos;
+
+void sys_read(struct regs *regs) {
+ if (regs->ebx == 1) {
+ while (kbuf_pos > regs->edx);
+ memcpy((char*)regs->ecx, keyboard_buffer, regs->edx);
}
- return 0;
}
-void dump_reg(struct isr_frame *frame) {
- kprintf("Registers at interrupt:\n");
- kprintf("\tEAX = %x\n", frame->eax);
- kprintf("\tEBX = %x\n", frame->ebx);
- kprintf("\tECX = %x\n", frame->ecx);
- kprintf("\tEDX = %x\n", frame->edx);
- kprintf("\tESI = %x\n", frame->esi);
- kprintf("\tEDI = %x\n", frame->edi);
- kprintf("\tEIP = %x\n", frame->eip);
- kprintf("Current code selector: %x\n", frame->cs);
+void sys_write(struct regs *regs) {
+ if (regs->ebx == 0)
+ fb_write((char*)regs->ecx, regs->edx);
}
-void dump_stack(uint32_t esp, size_t len) {
- for (uint32_t i = 0; i < len; i++)
- kprintf("%x:\t%x\n", esp+i, *(uint32_t*)(esp+i));
+int handle_syscall(struct regs *regs) {
+ switch (regs->eax) {
+ case SYS_READ:
+ sys_read(regs);
+ break;
+ case SYS_WRITE:
+ sys_write(regs);
+ break;
+ default:
+ panic("Invalid system call number");
+ }
+ return 0;
}
diff --git a/arch/i386/kernel/timer.c b/arch/i386/kernel/timer.c
index 9e53fbd..4aafed1 100644
--- a/arch/i386/kernel/timer.c
+++ b/arch/i386/kernel/timer.c
@@ -5,7 +5,7 @@
static uint32_t num_ticks = 0;
-void timer_handler(struct isr_frame *frame) {
+void timer_handler(struct regs *regs) {
num_ticks++;
if (num_ticks == 3) {
num_ticks = 0;
@@ -14,12 +14,12 @@ void timer_handler(struct isr_frame *frame) {
}
void timer_init(void) {
- asm __volatile__("cli");
+ disable_ints();
int divisor = 1193182 / 100;
outb(0x43, 0x34);
outb(0x40, divisor && 0xFF);
outb(0x40, divisor && 0xFF00 >> 8);
- asm __volatile__("sti");
+ enable_ints();
//uint8_t read = 0;
//outb(0x43, 0xE2);
diff --git a/arch/i386/make.config b/arch/i386/make.config
index 9d74c33..91b665d 100644
--- a/arch/i386/make.config
+++ b/arch/i386/make.config
@@ -4,9 +4,9 @@ KERNEL_ARCH_LDFLAGS=
KERNEL_ARCH_LIBS=
KERNEL_ARCH_OBJS=$(ARCHDIR)/boot/boot.o \
- $(ARCHDIR)/boot/isr.o \
- $(ARCHDIR)/boot/idt.o \
- $(ARCHDIR)/boot/gdt.o \
+ $(ARCHDIR)/kernel/idt.o \
+ $(ARCHDIR)/kernel/gdt.o \
+ $(ARCHDIR)/kernel/isr.o \
$(ARCHDIR)/kernel/framebuffer.o \
$(ARCHDIR)/kernel/multiboot.o \
$(ARCHDIR)/kernel/keyboard.o \
diff --git a/include/kernel/mem.h b/include/kernel/mem.h
index dfbcf23..aae3091 100644
--- a/include/kernel/mem.h
+++ b/include/kernel/mem.h
@@ -1,6 +1,5 @@
#ifndef KERNEL_MEM_H
-#include <kernel/paging.h>
#include <stddef.h>
int init_kmalloc(void);
diff --git a/include/kernel/panic.h b/include/kernel/panic.h
index 529702b..e15d6ee 100644
--- a/include/kernel/panic.h
+++ b/include/kernel/panic.h
@@ -1,6 +1,12 @@
#ifndef KERNEL_PANIC_H
#define KERNEL_PANIC_H
+#include <kernel/asm.h>
+#include <stdint.h>
+#include <stddef.h>
+
void panic(const char *str);
+void dump_reg(struct regs *regs);
+void dump_stack(struct regs *regs, size_t length);
#endif
diff --git a/kernel/panic.c b/kernel/panic.c
index be7cffb..b92ee4d 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -1,11 +1,29 @@
#include <kernel/panic.h>
#include <kernel/io.h>
+#include <stdint.h>
+#include <stddef.h>
static int panicked = 0;
void panic(const char *str) {
- kprintf("KERNEL PANIC\n");
- kprintf("ERROR: %s\n", str);
+ kprintf("KERNEL PANIC: %s\n", str);
panicked = 1;
while (1);
}
+
+void dump_reg(struct regs *regs) {
+ kprintf("Registers at interrupt:\n");
+ kprintf("\tEAX = %x\n", regs->eax);
+ kprintf("\tEBX = %x\n", regs->ebx);
+ kprintf("\tECX = %x\n", regs->ecx);
+ kprintf("\tEDX = %x\n", regs->edx);
+ kprintf("\tESI = %x\n", regs->esi);
+ kprintf("\tEDI = %x\n", regs->edi);
+ kprintf("\tEIP = %x\n", regs->eip);
+ kprintf("Current code selector: %x\n", regs->cs);
+}
+
+void dump_stack(struct regs *regs, size_t len) {
+ //for (uint32_t i = 0; i < len; i++)
+ // kprintf("%x:\t%x\n", esp+i, *(uint32_t*)(esp+i));
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-16 23:21:34 +0000