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#include <hilbert/kernel/terminal.hpp>
#include <hilbert/kernel/input.hpp>
#include <hilbert/kernel/panic.hpp>
using namespace hilbert::kernel;
struct [[gnu::packed]] exception_info_t {
uint64_t rax;
uint64_t rbx;
uint64_t rcx;
uint64_t rdx;
uint64_t rdi;
uint64_t rsi;
uint64_t rbp;
uint64_t rsp;
uint64_t r8;
uint64_t r9;
uint64_t r10;
uint64_t r11;
uint64_t r12;
uint64_t r13;
uint64_t r14;
uint64_t r15;
uint64_t cr2;
uint64_t cr3;
uint64_t rip;
uint64_t rflags;
uint64_t error;
uint8_t has_error;//0 or 1
uint8_t exception_number;
};
extern exception_info_t exception_info;
static const char *exception_types[] = {
"division error",
"",
"non-maskable interrupt",
"",
"",
"",
"invalid opcode",
"",
"double fault (uh oh)",
"",
"",
"",
"stack fault",
"general protection fault",
"page fault",
""
};
static const char *flag_names[] = {
" cf",
"",
" pf",
"",
" af",
"",
" zf",
" sf",
" tf",
" if",
" df",
" of",
"",
"",
" nt",
" md"
};
static void print_line(const char *r1, const char *r2, uint64_t r1v, uint64_t r2v) {
terminal::put_string_sz("\n ");
terminal::put_string_sz(r1);
terminal::put_string_sz(": 0x");
terminal::put_int_hex(r1v, 16);
terminal::put_string_sz(" ");
terminal::put_string_sz(r2);
terminal::put_string_sz(": 0x");
terminal::put_int_hex(r2v, 16);
}
extern "C" [[noreturn]] void print_exception() {
terminal::put_string_sz("exception handler:\n type: ");
terminal::put_string_sz(exception_types[exception_info.exception_number]);
terminal::put_string_sz(" (0x");
terminal::put_int_hex(exception_info.exception_number, 2);
terminal::put_char(')');
if (exception_info.has_error == 1) {
terminal::put_string_sz("\n error code: 0x");
terminal::put_int_hex(exception_info.error, 16);
}
terminal::put_string_sz("\n flags:");
if (exception_info.rflags == 0)
terminal::put_string_sz(" [none]");
else
for (int i = 0; i < 16; ++i)
if (((exception_info.rflags >> i) & 1) == 1)
terminal::put_string_sz(flag_names[i]);
if (exception_info.exception_number == 0x0e) {
terminal::put_string_sz("\n cr2: 0x");
terminal::put_int_hex(exception_info.cr2, 16);
}
print_line("cr3", "rip", exception_info.cr3, exception_info.rip);
print_line("rax", "rbx", exception_info.rax, exception_info.rbx);
print_line("rcx", "rdx", exception_info.rcx, exception_info.rdx);
print_line("rdi", "rsi", exception_info.rdi, exception_info.rsi);
print_line("rbp", "rsp", exception_info.rbp, exception_info.rsp);
print_line("r8 ", "r9 ", exception_info.r8 , exception_info.r9 );
print_line("r10", "r11", exception_info.r10, exception_info.r11);
print_line("r12", "r13", exception_info.r12, exception_info.r13);
print_line("r14", "r15", exception_info.r14, exception_info.r15);
while (1)
asm ("hlt");
}
static uint32_t current_flags = 0;
#define SETBIT(field, bit, cond) \
field = (cond) ? (field | (bit)) : (field & ~(bit));
static void got_key(uint32_t key) {
input::key_queue->insert(current_flags | key);
if (key == (input::BREAK | 0x77))
current_flags ^= input::NUM_LOCK;
else if (key == (input::BREAK | 0x58))
current_flags ^= input::CAPS_LOCK;
else if ((key & 0xff) == 0xa7)
SETBIT(current_flags, input::RIGHT_WIN, !(key & input::BREAK))
else if ((key & 0xff) == 0x9f)
SETBIT(current_flags, input::LEFT_WIN, !(key & input::BREAK))
else if ((key & 0xff) == 0x91)
SETBIT(current_flags, input::RIGHT_ALT, !(key & input::BREAK))
else if ((key & 0xff) == 0x11)
SETBIT(current_flags, input::LEFT_ALT, !(key & input::BREAK))
else if ((key & 0xff) == 0x94)
SETBIT(current_flags, input::RIGHT_CTRL, !(key & input::BREAK))
else if ((key & 0xff) == 0x14)
SETBIT(current_flags, input::LEFT_CTRL, !(key & input::BREAK))
else if ((key & 0xff) == 0x59)
SETBIT(current_flags, input::RIGHT_SHIFT, !(key & input::BREAK))
else if ((key & 0xff) == 0x12)
SETBIT(current_flags, input::LEFT_SHIFT, !(key & input::BREAK))
}
static uint8_t key_so_far[8];
uint8_t key_so_far_len = 0;
extern "C" void on_keyboard_interrupt(uint8_t byte) {
key_so_far[key_so_far_len++] = byte;
if (key_so_far_len == 1) {
if (byte != 0xe0 && byte != 0xe1 && byte != 0xf0) {
got_key(byte);
key_so_far_len = 0;
}
}
else if (key_so_far_len == 2) {
if (key_so_far[0] == 0xe0 && byte != 0xf0 && byte != 0x12) {
got_key(byte | 0x80);
key_so_far_len = 0;
}
else if (key_so_far[0] == 0xf0) {
got_key(input::BREAK | byte);
key_so_far_len = 0;
}
}
else if (key_so_far_len == 3) {
if (key_so_far[0] == 0xe0 && key_so_far[1] == 0xf0 && byte != 0x7c) {
got_key(input::BREAK | byte | 0x80);
key_so_far_len = 0;
}
}
else if (key_so_far_len == 4) {
if (key_so_far[0] == 0xe0 && key_so_far[1] == 0x12 &&
key_so_far[2] == 0xe0 && byte == 0x7c) {
got_key(0xe0);
key_so_far_len = 0;
}
}
else if (key_so_far_len == 6) {
if (key_so_far[0] == 0xe0 && key_so_far[1] == 0xf0 &&
key_so_far[2] == 0x7c && key_so_far[3] == 0xe0 &&
key_so_far[4] == 0xf0 && byte == 0x12) {
got_key(input::BREAK | 0xe0);
key_so_far_len = 0;
}
}
else if (key_so_far_len == 8) {
if (key_so_far[0] == 0xe1 && key_so_far[1] == 0x14 &&
key_so_far[2] == 0x77 && key_so_far[3] == 0xe1 &&
key_so_far[2] == 0xf0 && key_so_far[3] == 0x14 &&
key_so_far[4] == 0xf0 && byte == 0x77) {
got_key(0xe1);
got_key(input::BREAK | 0xe1);
}
key_so_far_len = 0;
}
}
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