Bellard's files from 2017 or so

This commit is contained in:
Jeff Carr 2025-05-30 02:52:38 -05:00
parent 1fa88176fc
commit 5e4018a0c0
3 changed files with 609 additions and 0 deletions

7
Makefile Normal file
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all:
@echo "this is Fabrice Bellard's unbelievable linux kernel in a browser"
wget-javascript:
rm -f *.js
wget -c https://bellard.org/jslinux/term.js
wget -c https://bellard.org/jslinux/jslinux.js

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jslinux.js Normal file
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/*
Linux launcher
Copyright (c) 2011-2012 Fabrice Bellard
Redistribution or commercial use is prohibited without the author's
permission.
*/
"use strict";
var term, pc, boot_start_time, init_state;
function term_start()
{
term = new Term(80, 30, term_handler);
term.open();
}
/* send chars to the serial port */
function term_handler(str)
{
pc.serial.send_chars(str);
}
function clipboard_set(val)
{
var el;
el = document.getElementById("text_clipboard");
el.value = val;
}
function clipboard_get()
{
var el;
el = document.getElementById("text_clipboard");
return el.value;
}
function clear_clipboard()
{
var el;
el = document.getElementById("text_clipboard");
el.value = "";
}
/* just used to display the boot time in the VM */
function get_boot_time()
{
return (+new Date()) - boot_start_time;
}
function start()
{
var params;
init_state = new Object();
params = new Object();
/* serial output chars */
params.serial_write = term.write.bind(term);
/* memory size (in bytes) */
params.mem_size = 31 * 1024 * 1024;
/* clipboard I/O */
params.clipboard_get = clipboard_get;
params.clipboard_set = clipboard_set;
params.get_boot_time = get_boot_time;
/* IDE drive. The raw disk image is split into files of
* 'block_size' KB.
*/
//params.hda = { url: "hda%d.bin", block_size: 64, nb_blocks: 912 };
params.hda = { url: "bin/hda%d.bin", block_size: 64, nb_blocks: 912 };
//modify by hao
pc = new PCEmulator(params);
init_state.params = params;
pc.load_binary("vmlinux-2.6.20.bin", 0x00100000, start2);
}
function start2(ret)
{
if (ret < 0)
return;
init_state.start_addr = 0x10000;
pc.load_binary("linuxstart.bin", init_state.start_addr, start3);
}
function start3(ret)
{
var block_list;
if (ret < 0)
return;
/* Preload blocks so that the boot time does not depend on the
* time to load the required disk data (optional) */
block_list = [ 0, 7, 3, 643, 720, 256, 336, 644, 781, 387, 464, 475, 131, 589, 468, 472, 474, 776, 777, 778, 779, 465, 466, 473, 467, 469, 470, 512, 592, 471, 691, 697, 708, 792, 775, 769 ];
pc.ide0.drives[0].bs.preload(block_list, start4);
}
function start4(ret)
{
var cmdline_addr;
if (ret < 0)
return;
/* set the Linux kernel command line */
cmdline_addr = 0xf800;
pc.cpu.write_string(cmdline_addr, "console=ttyS0 root=/dev/hda ro init=/sbin/init notsc=1 hdb=none");
pc.cpu.set_reg(8, init_state.start_addr); /* eip */
pc.cpu.set_reg(0, init_state.params.mem_size); /* eax */
pc.cpu.set_reg(3, 0); /* ebx = initrd_size (no longer used) */
pc.cpu.set_reg(1, cmdline_addr); /* ecx */
boot_start_time = (+new Date());
pc.start();
}
term_start();

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/*
Javascript Terminal
Copyright (c) 2011 Fabrice Bellard
Redistribution or commercial use is prohibited without the author's
permission.
*/
"use strict";
function Term(aa, ba, term_handler) {
this.w = aa;
this.h = ba;
this.cur_h = ba;
this.tot_h = 1000;
this.y_base = 0;
this.y_disp = 0;
this.x = 0;
this.y = 0;
this.cursorstate = 0;
this.handler = term_handler;
this.convert_lf_to_crlf = false;
this.state = 0;
this.output_queue = "";
this.bg_colors = ["#000000", "#ff0000", "#00ff00", "#ffff00", "#0000ff", "#ff00ff", "#00ffff", "#ffffff"];
this.fg_colors = ["#000000", "#ff0000", "#00ff00", "#ffff00", "#0000ff", "#ff00ff", "#00ffff", "#ffffff"];
this.def_attr = (7 << 3) | 0;
this.cur_attr = this.def_attr;
this.is_mac = (navigator.userAgent.indexOf("Mac") >= 0) ? true: false;
this.key_rep_state = 0;
this.key_rep_str = "";
}
Term.prototype.open = function() {
var y, da, i, ea, c;
this.lines = new Array();
c = 32 | (this.def_attr << 16);
for (y = 0; y < this.cur_h; y++) {
da = new Array();
for (i = 0; i < this.w; i++) da[i] = c;
this.lines[y] = da;
}
document.writeln('<table border="0" cellspacing="0" cellpadding="0">');
for (y = 0; y < this.h; y++) {
document.writeln('<tr><td class="term" id="tline' + y + '"></td></tr>');
}
document.writeln('</table>');
this.refresh(0, this.h - 1);
document.addEventListener("keydown", this.keyDownHandler.bind(this), true);
document.addEventListener("keypress", this.keyPressHandler.bind(this), true);
ea = this;
setInterval(function() {
ea.cursor_timer_cb();
},
1000);
};
Term.prototype.refresh = function(fa, ga) {
var ha, y, da, ia, c, w, i, ja, ka, la, ma, na, oa;
for (y = fa; y <= ga; y++) {
oa = y + this.y_disp;
if (oa >= this.cur_h) oa -= this.cur_h;
da = this.lines[oa];
ia = "";
w = this.w;
if (y == this.y && this.cursor_state && this.y_disp == this.y_base) {
ja = this.x;
} else {
ja = -1;
}
la = this.def_attr;
for (i = 0; i < w; i++) {
c = da[i];
ka = c >> 16;
c &= 65535;
if (i == ja) {
ka = -1;
}
if (ka != la) {
if (la != this.def_attr) ia += '</span>';
if (ka != this.def_attr) {
if (ka == -1) {
ia += '<span class="termReverse">';
} else {
ia += '<span style="';
ma = (ka >> 3) & 7;
na = ka & 7;
if (ma != 7) {
ia += 'color:' + this.fg_colors[ma] + ';';
}
if (na != 0) {
ia += 'background-color:' + this.bg_colors[na] + ';';
}
ia += '">';
}
}
}
switch (c) {
case 32:
ia += "&nbsp;";
break;
case 38:
ia += "&amp;";
break;
case 60:
ia += "&lt;";
break;
case 62:
ia += "&gt;";
break;
default:
if (c < 32) {
ia += "&nbsp;";
} else {
ia += String.fromCharCode(c);
}
break;
}
la = ka;
}
if (la != this.def_attr) {
ia += '</span>';
}
ha = document.getElementById("tline" + y);
ha.innerHTML = ia;
}
};
Term.prototype.cursor_timer_cb = function() {
this.cursor_state ^= 1;
this.refresh(this.y, this.y);
};
Term.prototype.show_cursor = function() {
if (!this.cursor_state) {
this.cursor_state = 1;
this.refresh(this.y, this.y);
}
};
Term.prototype.scroll = function() {
var y, da, x, c, oa;
if (this.cur_h < this.tot_h) {
this.cur_h++;
}
if (++this.y_base == this.cur_h) this.y_base = 0;
this.y_disp = this.y_base;
c = 32 | (this.def_attr << 16);
da = new Array();
for (x = 0; x < this.w; x++) da[x] = c;
oa = this.y_base + this.h - 1;
if (oa >= this.cur_h) oa -= this.cur_h;
this.lines[oa] = da;
};
Term.prototype.scroll_disp = function(n) {
var i, oa;
if (n >= 0) {
for (i = 0; i < n; i++) {
if (this.y_disp == this.y_base) break;
if (++this.y_disp == this.cur_h) this.y_disp = 0;
}
} else {
n = -n;
oa = this.y_base + this.h;
if (oa >= this.cur_h) oa -= this.cur_h;
for (i = 0; i < n; i++) {
if (this.y_disp == oa) break;
if (--this.y_disp < 0) this.y_disp = this.cur_h - 1;
}
}
this.refresh(0, this.h - 1);
};
Term.prototype.write = function(pa) {
function qa(y) {
fa = Math.min(fa, y);
ga = Math.max(ga, y);
}
function ra(s, x, y) {
var l, i, c, oa;
oa = s.y_base + y;
if (oa >= s.cur_h) oa -= s.cur_h;
l = s.lines[oa];
c = 32 | (s.def_attr << 16);
for (i = x; i < s.w; i++) l[i] = c;
qa(y);
}
function sa(s, ta) {
var j, n;
if (ta.length == 0) {
s.cur_attr = s.def_attr;
} else {
for (j = 0; j < ta.length; j++) {
n = ta[j];
if (n >= 30 && n <= 37) {
s.cur_attr = (s.cur_attr & ~ (7 << 3)) | ((n - 30) << 3);
} else if (n >= 40 && n <= 47) {
s.cur_attr = (s.cur_attr & ~7) | (n - 40);
} else if (n == 0) {
s.cur_attr = s.def_attr;
}
}
}
}
var ua = 0;
var va = 1;
var wa = 2;
var i, c, fa, ga, l, n, j, oa;
fa = this.h;
ga = -1;
qa(this.y);
if (this.y_base != this.y_disp) {
this.y_disp = this.y_base;
fa = 0;
ga = this.h - 1;
}
for (i = 0; i < pa.length; i++) {
c = pa.charCodeAt(i);
switch (this.state) {
case ua:
switch (c) {
case 10:
if (this.convert_lf_to_crlf) {
this.x = 0;
}
this.y++;
if (this.y >= this.h) {
this.y--;
this.scroll();
fa = 0;
ga = this.h - 1;
}
break;
case 13:
this.x = 0;
break;
case 8:
if (this.x > 0) {
this.x--;
}
break;
case 9:
n = (this.x + 8) & ~7;
if (n <= this.w) {
this.x = n;
}
break;
case 27:
this.state = va;
break;
default:
if (c >= 32) {
if (this.x >= this.w) {
this.x = 0;
this.y++;
if (this.y >= this.h) {
this.y--;
this.scroll();
fa = 0;
ga = this.h - 1;
}
}
oa = this.y + this.y_base;
if (oa >= this.cur_h) oa -= this.cur_h;
this.lines[oa][this.x] = (c & 65535) | (this.cur_attr << 16);
this.x++;
qa(this.y);
}
break;
}
break;
case va:
if (c == 91) {
this.esc_params = new Array();
this.cur_param = 0;
this.state = wa;
} else {
this.state = ua;
}
break;
case wa:
if (c >= 48 && c <= 57) {
this.cur_param = this.cur_param * 10 + c - 48;
} else {
this.esc_params[this.esc_params.length] = this.cur_param;
this.cur_param = 0;
if (c == 59) break;
this.state = ua;
switch (c) {
case 65:
n = this.esc_params[0];
if (n < 1) n = 1;
this.y -= n;
if (this.y < 0) this.y = 0;
break;
case 66:
n = this.esc_params[0];
if (n < 1) n = 1;
this.y += n;
if (this.y >= this.h) this.y = this.h - 1;
break;
case 67:
n = this.esc_params[0];
if (n < 1) n = 1;
this.x += n;
if (this.x >= this.w - 1) this.x = this.w - 1;
break;
case 68:
n = this.esc_params[0];
if (n < 1) n = 1;
this.x -= n;
if (this.x < 0) this.x = 0;
break;
case 72:
{
var xa, oa;
oa = this.esc_params[0] - 1;
if (this.esc_params.length >= 2) xa = this.esc_params[1] - 1;
else xa = 0;
if (oa < 0) oa = 0;
else if (oa >= this.h) oa = this.h - 1;
if (xa < 0) xa = 0;
else if (xa >= this.w) xa = this.w - 1;
this.x = xa;
this.y = oa;
}
break;
case 74:
ra(this, this.x, this.y);
for (j = this.y + 1; j < this.h; j++) ra(this, 0, j);
break;
case 75:
ra(this, this.x, this.y);
break;
case 109:
sa(this, this.esc_params);
break;
case 110:
this.queue_chars("\x1b[" + (this.y + 1) + ";" + (this.x + 1) + "R");
break;
default:
break;
}
}
break;
}
}
qa(this.y);
if (ga >= fa) this.refresh(fa, ga);
};
Term.prototype.writeln = function(pa) {
this.write(pa + '\r\n');
};
Term.prototype.keyDownHandler = function(ya) {
var pa;
pa = "";
switch (ya.keyCode) {
case 8:
pa = "";
break;
case 9:
pa = "\t";
break;
case 13:
pa = "\r";
break;
case 27:
pa = "\x1b";
break;
case 37:
pa = "\x1b[D";
break;
case 39:
pa = "\x1b[C";
break;
case 38:
if (ya.ctrlKey) {
this.scroll_disp( - 1);
} else {
pa = "\x1b[A";
}
break;
case 40:
if (ya.ctrlKey) {
this.scroll_disp(1);
} else {
pa = "\x1b[B";
}
break;
case 46:
pa = "\x1b[3~";
break;
case 45:
pa = "\x1b[2~";
break;
case 36:
pa = "\x1bOH";
break;
case 35:
pa = "\x1bOF";
break;
case 33:
if (ya.ctrlKey) {
this.scroll_disp( - (this.h - 1));
} else {
pa = "\x1b[5~";
}
break;
case 34:
if (ya.ctrlKey) {
this.scroll_disp(this.h - 1);
} else {
pa = "\x1b[6~";
}
break;
default:
if (ya.ctrlKey) {
if (ya.keyCode >= 65 && ya.keyCode <= 90) {
pa = String.fromCharCode(ya.keyCode - 64);
} else if (ya.keyCode == 32) {
pa = String.fromCharCode(0);
}
} else if ((!this.is_mac && ya.altKey) || (this.is_mac && ya.metaKey)) {
if (ya.keyCode >= 65 && ya.keyCode <= 90) {
pa = "\x1b" + String.fromCharCode(ya.keyCode + 32);
}
}
break;
}
if (pa) {
if (ya.stopPropagation) ya.stopPropagation();
if (ya.preventDefault) ya.preventDefault();
this.show_cursor();
this.key_rep_state = 1;
this.key_rep_str = pa;
this.handler(pa);
return false;
} else {
this.key_rep_state = 0;
return true;
}
};
Term.prototype.keyPressHandler = function(ya) {
var pa, za;
if (ya.stopPropagation) ya.stopPropagation();
if (ya.preventDefault) ya.preventDefault();
pa = "";
if (! ("charCode" in ya)) {
za = ya.keyCode;
if (this.key_rep_state == 1) {
this.key_rep_state = 2;
return false;
} else if (this.key_rep_state == 2) {
this.show_cursor();
this.handler(this.key_rep_str);
return false;
}
} else {
za = ya.charCode;
}
if (za != 0) {
if (!ya.ctrlKey && ((!this.is_mac && !ya.altKey) || (this.is_mac && !ya.metaKey))) {
pa = String.fromCharCode(za);
}
}
if (pa) {
this.show_cursor();
this.handler(pa);
return false;
} else {
return true;
}
};
Term.prototype.queue_chars = function(pa) {
this.output_queue += pa;
if (this.output_queue) setTimeout(this.outputHandler.bind(this), 0);
};
Term.prototype.outputHandler = function() {
if (this.output_queue) {
this.handler(this.output_queue);
this.output_queue = "";
}
};