Merge branch 'development' into Interrupts

Signed-off-by: RedsonBr140 <redson@riseup.net>

.gitignore

@@ -80,6 +80,6 @@ dkms.conf
 *.iso
 
 ## Bochs
-bx_enh_dbg.ini
 
-compile_commands.json
+bx_enh_dbg.ini
+compile_commands.json

Kernel/Arch/x86_64-pc/Include/System/ISR.h

@@ -0,0 +1,12 @@
+#pragma once
+#include <stdint.h>
+
+typedef struct {
+    uint64_t r15, r14, r13, r12, r11, r10, r9, r8;
+    uint64_t rdi, rsi, rbx, rdx, rcx, rax;
+    uint64_t interrupt, error;
+} __attribute__((packed)) Registers;
+
+typedef void (*ISRHandler)(Registers *regs);
+
+void isr_register_handler(int interrupt, ISRHandler handler);

Kernel/Arch/x86_64-pc/System/ISR.asm

@@ -0,0 +1,98 @@
+[bits 64]
+[extern isr_handler]
+
+%macro isr_err_stub 1
+isr_stub_%+%1:
+    push %1
+    jmp isr_common
+%endmacro
+
+%macro isr_no_err_stub 1
+isr_stub_%+%1:
+    push 0
+    push %1
+    jmp isr_common
+%endmacro
+
+%macro pushagrd 0
+    push rax
+    push rbx
+    push rcx
+    push rdx
+    push rsi
+    push rdi
+    push r8
+    push r9
+    push r10
+    push r11
+    push r12
+    push r13
+    push r14
+    push r15
+%endmacro
+
+%macro popagrd 0
+    pop r15
+    pop r14
+    pop r13
+    pop r12
+    pop r11
+    pop r10
+    pop r9
+    pop r8
+    pop rdi
+    pop rsi
+    pop rdx
+    pop rcx
+    pop rbx
+    pop rax
+%endmacro
+
+isr_common:
+    pushagrd
+    mov rdi, rsp
+    call isr_handler
+    popagrd
+    add rsp, 16
+    iretq
+
+isr_no_err_stub 0
+isr_no_err_stub 1
+isr_no_err_stub 2
+isr_no_err_stub 3
+isr_no_err_stub 4
+isr_no_err_stub 5
+isr_no_err_stub 6
+isr_no_err_stub 7
+isr_err_stub    8
+isr_no_err_stub 9
+isr_err_stub    10
+isr_err_stub    11
+isr_err_stub    12
+isr_err_stub    13
+isr_err_stub    14
+isr_no_err_stub 15
+isr_no_err_stub 16
+isr_err_stub    17
+isr_no_err_stub 18
+isr_no_err_stub 19
+isr_no_err_stub 20
+isr_no_err_stub 21
+isr_no_err_stub 22
+isr_no_err_stub 23
+isr_no_err_stub 24
+isr_no_err_stub 25
+isr_no_err_stub 26
+isr_no_err_stub 27
+isr_no_err_stub 28
+isr_no_err_stub 29
+isr_err_stub    30
+isr_no_err_stub 31
+
+global isr_stub_table
+isr_stub_table:
+%assign i 0
+%rep 32
+    dq isr_stub_%+i
+%assign i i+1
+%endrep

Kernel/Arch/x86_64-pc/System/ISR.c

@@ -0,0 +1,55 @@
+#include <LibK/stdio.h>
+#include <System/ISR.h>
+#include <stddef.h>
+
+ISRHandler ISR_handlers[256];
+
+static const char *const exceptions_str[] = {"Division by Zero",
+                                             "Debug",
+                                             "Non-maskable Interrupt",
+                                             "Breakpoint",
+                                             "Overflow",
+                                             "Bound Range Exceeded",
+                                             "Invalid Opcode",
+                                             "Device Not Available",
+                                             "Double Fault",
+                                             "Coprocessor Segment Overrun",
+                                             "Invalid TSS",
+                                             "Segment Not Present",
+                                             "Stack-Segment Fault",
+                                             "General Protection Fault",
+                                             "Page Fault",
+                                             "",
+                                             "x87 Floating-Point Exception",
+                                             "Alignment Check",
+                                             "Machine Check",
+                                             "SIMD Floating-Point Exception",
+                                             "Virtualization Exception",
+                                             "Control Protection Exception ",
+                                             "",
+                                             "",
+                                             "",
+                                             "",
+                                             "",
+                                             "",
+                                             "Hypervisor Injection Exception",
+                                             "VMM Communication Exception",
+                                             "Security Exception",
+                                             ""};
+
+void isr_handler(Registers *frame);
+void isr_handler(Registers *frame) {
+    uint64_t isr = frame->interrupt;
+
+    if (ISR_handlers[isr] != NULL)
+        ISR_handlers[isr](frame);
+    else if (isr < 32) {
+        kprintf("Unhandled exception %d %s", isr, exceptions_str[isr]);
+    } else {
+        kprintf("Unhandled interrupt: %d", isr);
+    }
+}
+
+void isr_register_handler(int interrupt, ISRHandler handler) {
+    ISR_handlers[interrupt] = handler;
+}