f72d0a9ca0
Physical memory is still limited to 32-bit addresses, but systems that enable PAE should work now.
665 lines
18 KiB
JavaScript
665 lines
18 KiB
JavaScript
"use strict";
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CPU.prototype.debug_init = function()
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{
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var cpu = this;
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var debug = {};
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this.debug = debug;
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debug.init = function()
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{
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if(!DEBUG) return;
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if(cpu.io)
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{
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// write seabios debug output to console
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var seabios_debug = "";
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cpu.io.register_write(0x402, this, handle); // seabios
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cpu.io.register_write(0x500, this, handle); // vgabios
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}
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function handle(out_byte)
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{
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if(out_byte === 10)
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{
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dbg_log(seabios_debug, LOG_BIOS);
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seabios_debug = "";
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}
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else
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{
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seabios_debug += String.fromCharCode(out_byte);
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}
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}
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};
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debug.get_regs_short = get_regs_short;
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debug.dump_regs = dump_regs_short;
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debug.get_state = get_state;
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debug.dump_state = dump_state;
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debug.dump_stack = dump_stack;
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debug.dump_page_structures = dump_page_structures;
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debug.dump_gdt_ldt = dump_gdt_ldt;
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debug.dump_idt = dump_idt;
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debug.get_memory_dump = get_memory_dump;
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debug.memory_hex_dump = memory_hex_dump;
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debug.used_memory_dump = used_memory_dump;
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function dump_stack(start, end)
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{
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if(!DEBUG) return;
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var esp = cpu.reg32[REG_ESP];
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dbg_log("========= STACK ==========");
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if(end >= start || end === undefined)
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{
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start = 5;
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end = -5;
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}
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for(var i = start; i > end; i--)
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{
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var line = " ";
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if(!i) line = "=> ";
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line += h(i, 2) + " | ";
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dbg_log(line + h(esp + 4 * i, 8) + " | " + h(cpu.read32s(esp + 4 * i) >>> 0));
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}
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}
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function get_state(where)
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{
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if(!DEBUG) return;
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var mode = cpu.protected_mode[0] ? "prot" : "real";
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var vm = (cpu.flags[0] & FLAG_VM) ? 1 : 0;
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var flags = cpu.get_eflags();
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var iopl = cpu.getiopl();
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var cpl = cpu.cpl[0];
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var cs_eip = h(cpu.sreg[REG_CS], 4) + ":" + h(cpu.get_real_eip() >>> 0, 8);
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var ss_esp = h(cpu.sreg[REG_SS], 4) + ":" + h(cpu.reg32[REG_ES] >>> 0, 8);
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var op_size = cpu.is_32[0] ? "32" : "16";
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var if_ = (cpu.flags[0] & FLAG_INTERRUPT) ? 1 : 0;
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var flag_names = {
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[FLAG_CARRY]: "c",
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[FLAG_PARITY]: "p",
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[FLAG_ADJUST]: "a",
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[FLAG_ZERO]: "z",
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[FLAG_SIGN]: "s",
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[FLAG_TRAP]: "t",
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[FLAG_INTERRUPT]: "i",
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[FLAG_DIRECTION]: "d",
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[FLAG_OVERFLOW]: "o",
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};
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var flag_string = "";
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for(var i = 0; i < 16; i++)
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{
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if(flag_names[1 << i])
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{
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if(flags & 1 << i)
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{
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flag_string += flag_names[1 << i];
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}
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else
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{
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flag_string += " ";
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}
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}
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}
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return ("mode=" + mode + "/" + op_size + " paging=" + (+((cpu.cr[0] & CR0_PG) !== 0)) +
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" pae=" + (+((cpu.cr[4] & CR4_PAE) !== 0)) +
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" iopl=" + iopl + " cpl=" + cpl + " if=" + if_ + " cs:eip=" + cs_eip +
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" cs_off=" + h(cpu.get_seg_cs() >>> 0, 8) +
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" flgs=" + h(cpu.get_eflags() >>> 0, 6) + " (" + flag_string + ")" +
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" ss:esp=" + ss_esp +
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" ssize=" + (+cpu.stack_size_32[0]) +
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(where ? " in " + where : ""));
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}
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function dump_state(where)
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{
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if(!DEBUG) return;
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dbg_log(get_state(where), LOG_CPU);
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}
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function get_regs_short()
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{
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var
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r32 = { "eax": REG_EAX, "ecx": REG_ECX, "edx": REG_EDX, "ebx": REG_EBX,
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"esp": REG_ESP, "ebp": REG_EBP, "esi": REG_ESI, "edi": REG_EDI },
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r32_names = ["eax", "ecx", "edx", "ebx", "esp", "ebp", "esi", "edi"],
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s = { "cs": REG_CS, "ds": REG_DS, "es": REG_ES, "fs": REG_FS, "gs": REG_GS, "ss": REG_SS },
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line1 = "",
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line2 = "";
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for(var i = 0; i < 4; i++)
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{
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line1 += r32_names[i] + "=" + h(cpu.reg32[r32[r32_names[i]]] >>> 0, 8) + " ";
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line2 += r32_names[i+4] + "=" + h(cpu.reg32[r32[r32_names[i+4]]] >>> 0, 8) + " ";
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}
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//line1 += " eip=" + h(cpu.get_real_eip() >>> 0, 8);
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//line2 += " flg=" + h(cpu.get_eflags(), 8);
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line1 += " ds=" + h(cpu.sreg[REG_DS], 4) + " es=" + h(cpu.sreg[REG_ES], 4) + " fs=" + h(cpu.sreg[REG_FS], 4);
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line2 += " gs=" + h(cpu.sreg[REG_GS], 4) + " cs=" + h(cpu.sreg[REG_CS], 4) + " ss=" + h(cpu.sreg[REG_SS], 4);
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return [line1, line2];
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}
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function dump_regs_short()
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{
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if(!DEBUG) return;
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var lines = get_regs_short();
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dbg_log(lines[0], LOG_CPU);
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dbg_log(lines[1], LOG_CPU);
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}
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function dump_gdt_ldt()
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{
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if(!DEBUG) return;
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dbg_log("gdt: (len = " + h(cpu.gdtr_size[0]) + ")");
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dump_table(cpu.translate_address_system_read(cpu.gdtr_offset[0]), cpu.gdtr_size[0]);
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dbg_log("\nldt: (len = " + h(cpu.segment_limits[REG_LDTR]) + ")");
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dump_table(cpu.translate_address_system_read(cpu.segment_offsets[REG_LDTR]), cpu.segment_limits[REG_LDTR]);
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function dump_table(addr, size)
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{
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for(var i = 0; i < size; i += 8, addr += 8)
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{
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var base = cpu.read16(addr + 2) |
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cpu.read8(addr + 4) << 16 |
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cpu.read8(addr + 7) << 24,
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limit = cpu.read16(addr) | (cpu.read8(addr + 6) & 0xF) << 16,
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access = cpu.read8(addr + 5),
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flags = cpu.read8(addr + 6) >> 4,
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flags_str = "",
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dpl = access >> 5 & 3;
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if(!(access & 128))
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{
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// present bit not set
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//continue;
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flags_str += "NP ";
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}
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else
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{
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flags_str += " P ";
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}
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if(access & 16)
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{
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if(flags & 4)
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{
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flags_str += "32b ";
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}
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else
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{
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flags_str += "16b ";
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}
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if(access & 8)
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{
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// executable
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flags_str += "X ";
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if(access & 4)
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{
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flags_str += "C ";
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}
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}
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else
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{
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// data
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flags_str += "R ";
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}
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flags_str += "RW ";
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}
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else
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{
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// system
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flags_str += "sys: " + h(access & 15);
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}
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if(flags & 8)
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{
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limit = limit << 12 | 0xFFF;
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}
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dbg_log(h(i & ~7, 4) + " " + h(base >>> 0, 8) + " (" + h(limit >>> 0, 8) + " bytes) " +
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flags_str + "; dpl = " + dpl + ", a = " + access.toString(2) +
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", f = " + flags.toString(2));
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}
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}
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}
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function dump_idt()
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{
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if(!DEBUG) return;
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for(var i = 0; i < cpu.idtr_size[0]; i += 8)
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{
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var addr = cpu.translate_address_system_read(cpu.idtr_offset[0] + i),
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base = cpu.read16(addr) | cpu.read16(addr + 6) << 16,
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selector = cpu.read16(addr + 2),
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type = cpu.read8(addr + 5),
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line,
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dpl = type >> 5 & 3;
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if((type & 31) === 5)
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{
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line = "task gate ";
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}
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else if((type & 31) === 14)
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{
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line = "intr gate ";
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}
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else if((type & 31) === 15)
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{
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line = "trap gate ";
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}
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else
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{
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line = "invalid ";
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}
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if(type & 128)
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{
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line += " P";
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}
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else
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{
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// present bit not set
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//continue;
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line += "NP";
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}
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dbg_log(h(i >> 3, 4) + " " + h(base >>> 0, 8) + ", " +
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h(selector, 4) + "; " + line + "; dpl = " + dpl + ", t = " + type.toString(2));
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}
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}
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function load_page_entry(dword_entry, pae, is_directory)
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{
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if(!DEBUG) return;
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if(!(dword_entry & 1))
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{
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// present bit not set
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return false;
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}
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var size = (dword_entry & 128) === 128,
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address;
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if(size && !is_directory)
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{
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address = dword_entry & (pae ? 0xFFE00000 : 0xFFC00000);
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}
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else
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{
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address = dword_entry & 0xFFFFF000;
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}
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return {
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size: size,
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global: (dword_entry & 256) === 256,
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accessed: (dword_entry & 0x20) === 0x20,
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dirty: (dword_entry & 0x40) === 0x40,
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cache_disable : (dword_entry & 16) === 16,
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user : (dword_entry & 4) === 4,
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read_write : (dword_entry & 2) === 2,
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address : address >>> 0
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};
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}
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var dbg_log = console.log.bind(console);
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function dump_page_structures() {
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var pae = !!(cpu.cr[4] & CR4_PAE);
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if (pae)
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{
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dbg_log("PAE enabled");
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for (var i = 0; i < 4; i++) {
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var addr = cpu.cr[3] + 8 * i;
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var dword = cpu.read32s(addr);
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if (dword & 1)
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{
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dump_page_directory(dword & 0xFFFFF000, true, i << 30);
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}
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}
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}
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else
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{
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dbg_log("PAE disabled");
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dump_page_directory(cpu.cr[3], false, 0);
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}
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}
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/* NOTE: PAE entries are 64-bits, we ignore the high half here. */
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function dump_page_directory(pd_addr, pae, start)
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{
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if(!DEBUG) return;
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var n = pae ? 512 : 1024;
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var entry_size = pae ? 8 : 4;
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var pd_shift = pae ? 21 : 22;
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for(var i = 0; i < n; i++)
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{
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var addr = pd_addr + i * entry_size,
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dword = cpu.read32s(addr),
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entry = load_page_entry(dword, pae, true);
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if(!entry)
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{
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continue;
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}
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var flags = "";
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flags += entry.size ? "S " : " ";
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flags += entry.accessed ? "A " : " ";
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flags += entry.cache_disable ? "Cd " : " ";
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flags += entry.user ? "U " : " ";
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flags += entry.read_write ? "Rw " : " ";
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if(entry.size)
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{
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dbg_log("=== " + h(start + (i << pd_shift) >>> 0, 8) + " -> " +
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h(entry.address >>> 0, 8) + " | " + flags);
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continue;
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}
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else
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{
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dbg_log("=== " + h(start + (i << pd_shift) >>> 0, 8) + " | " + flags);
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}
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for(var j = 0; j < n; j++)
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{
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var sub_addr = entry.address + j * entry_size;
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dword = cpu.read32s(sub_addr);
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var subentry = load_page_entry(dword, pae, false);
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if(subentry)
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{
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flags = "";
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flags += subentry.cache_disable ? "Cd " : " ";
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flags += subentry.user ? "U " : " ";
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flags += subentry.read_write ? "Rw " : " ";
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flags += subentry.global ? "G " : " ";
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flags += subentry.accessed ? "A " : " ";
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flags += subentry.dirty ? "Di " : " ";
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dbg_log("# " + h(start + (i << pd_shift | j << 12) >>> 0, 8) + " -> " +
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h(subentry.address, 8) + " | " + flags + " (at " + h(sub_addr, 8) + ")");
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}
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}
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}
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}
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function get_memory_dump(start, count)
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{
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if(!DEBUG) return;
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if(start === undefined)
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{
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start = 0;
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count = cpu.memory_size[0];
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}
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else if(count === undefined)
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{
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count = start;
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start = 0;
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}
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return cpu.mem8.slice(start, start + count).buffer;
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}
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function memory_hex_dump(addr, length)
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{
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if(!DEBUG) return;
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length = length || 4 * 0x10;
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var line, byt;
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for(var i = 0; i < length >> 4; i++)
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{
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line = h(addr + (i << 4), 5) + " ";
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for(var j = 0; j < 0x10; j++)
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{
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byt = cpu.read8(addr + (i << 4) + j);
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line += h(byt, 2) + " ";
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}
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line += " ";
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for(j = 0; j < 0x10; j++)
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{
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byt = cpu.read8(addr + (i << 4) + j);
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line += (byt < 33 || byt > 126) ? "." : String.fromCharCode(byt);
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}
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dbg_log(line);
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}
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}
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function used_memory_dump()
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{
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if(!DEBUG) return;
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var width = 0x80,
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height = 0x10,
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block_size = cpu.memory_size[0] / width / height | 0,
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row;
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for(var i = 0; i < height; i++)
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{
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row = h(i * width * block_size, 8) + " | ";
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for(var j = 0; j < width; j++)
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{
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var used = cpu.mem32s[(i * width + j) * block_size] > 0;
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row += used ? "X" : " ";
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}
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dbg_log(row);
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}
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}
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debug.debug_interrupt = function(interrupt_nr)
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{
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//if(interrupt_nr === 0x20)
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//{
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// //var vxd_device = cpu.safe_read16(cpu.instruction_pointer + 2);
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// //var vxd_sub = cpu.safe_read16(cpu.instruction_pointer + 0);
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// //var service = "";
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// //if(vxd_device === 1)
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// //{
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// // service = vxd_table1[vxd_sub];
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// //}
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// //dbg_log("vxd: " + h(vxd_device, 4) + " " + h(vxd_sub, 4) + " " + service);
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//}
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//if(interrupt_nr >= 0x21 && interrupt_nr < 0x30)
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//{
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// dbg_log("dos: " + h(interrupt_nr, 2) + " ah=" + h(this.reg8[reg_ah], 2) + " ax=" + h(this.reg16[reg_ax], 4));
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//}
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//if(interrupt_nr === 0x13 && (this.reg8[reg_ah] | 1) === 0x43)
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//{
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// this.debug.memory_hex_dump(this.get_seg(reg_ds) + this.reg16[reg_si], 0x18);
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//}
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//if(interrupt_nr == 0x10)
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//{
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// dbg_log("int10 ax=" + h(this.reg16[reg_ax], 4) + " '" + String.fromCharCode(this.reg8[reg_al]) + "'");
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// this.debug.dump_regs_short();
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// if(this.reg8[reg_ah] == 0xe) vga.tt_write(this.reg8[reg_al]);
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//}
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//if(interrupt_nr === 0x13)
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//{
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// this.debug.dump_regs_short();
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//}
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//if(interrupt_nr === 6)
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//{
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// this.instruction_pointer += 2;
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// dbg_log("BUG()", LOG_CPU);
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// dbg_log("line=" + this.read_imm16() + " " +
|
|
// "file=" + this.read_string(this.translate_address_read(this.read_imm32s())), LOG_CPU);
|
|
// this.instruction_pointer -= 8;
|
|
// this.debug.dump_regs_short();
|
|
//}
|
|
|
|
//if(interrupt_nr === 0x80)
|
|
//{
|
|
// dbg_log("linux syscall");
|
|
// this.debug.dump_regs_short();
|
|
//}
|
|
|
|
//if(interrupt_nr === 0x40)
|
|
//{
|
|
// dbg_log("kolibri syscall");
|
|
// this.debug.dump_regs_short();
|
|
//}
|
|
};
|
|
|
|
let cs;
|
|
let capstone_decoder;
|
|
|
|
debug.dump_code = function(is_32, buffer, start)
|
|
{
|
|
if(!capstone_decoder)
|
|
{
|
|
if(cs === undefined)
|
|
{
|
|
if(typeof require === "function")
|
|
{
|
|
cs = require("./capstone-x86.min.js");
|
|
}
|
|
else
|
|
{
|
|
cs = window.cs;
|
|
}
|
|
|
|
if(cs === undefined)
|
|
{
|
|
dbg_log("Warning: Missing capstone library, disassembly not available");
|
|
return;
|
|
}
|
|
}
|
|
|
|
capstone_decoder = [
|
|
new cs.Capstone(cs.ARCH_X86, cs.MODE_16),
|
|
new cs.Capstone(cs.ARCH_X86, cs.MODE_32),
|
|
];
|
|
}
|
|
|
|
try
|
|
{
|
|
const instructions = capstone_decoder[is_32].disasm(buffer, start);
|
|
|
|
instructions.forEach(function (instr) {
|
|
dbg_log(h(instr.address >>> 0) + ": " +
|
|
v86util.pads(instr.bytes.map(x => h(x, 2).slice(-2)).join(" "), 20) + " " +
|
|
instr.mnemonic + " " + instr.op_str);
|
|
});
|
|
dbg_log("");
|
|
}
|
|
catch(e)
|
|
{
|
|
dbg_log("Could not disassemble: " + Array.from(buffer).map(x => h(x, 2)).join(" "));
|
|
}
|
|
};
|
|
|
|
function dump_file(ab, name)
|
|
{
|
|
var blob = new Blob([ab]);
|
|
|
|
var a = document.createElement("a");
|
|
a["download"] = name;
|
|
a.href = window.URL.createObjectURL(blob);
|
|
a.dataset["downloadurl"] = ["application/octet-stream", a["download"], a.href].join(":");
|
|
|
|
a.click();
|
|
window.URL.revokeObjectURL(a.src);
|
|
}
|
|
|
|
let wabt;
|
|
|
|
debug.dump_wasm = function(buffer)
|
|
{
|
|
if(wabt === undefined)
|
|
{
|
|
if(typeof require === "function")
|
|
{
|
|
wabt = require("./libwabt.js");
|
|
}
|
|
else
|
|
{
|
|
wabt = new window.WabtModule;
|
|
}
|
|
|
|
if(wabt === undefined)
|
|
{
|
|
dbg_log("Warning: Missing libwabt, wasm dump not available");
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Need to make a small copy otherwise libwabt goes nuts trying to copy
|
|
// the whole underlying buffer
|
|
buffer = buffer.slice();
|
|
|
|
try
|
|
{
|
|
var module = wabt.readWasm(buffer, { readDebugNames: false });
|
|
module.generateNames();
|
|
module.applyNames();
|
|
const result = module.toText({ foldExprs: true, inlineExport: true });
|
|
dbg_log(result);
|
|
}
|
|
catch(e)
|
|
{
|
|
dump_file(buffer, "failed.wasm");
|
|
console.log(e.toString());
|
|
}
|
|
finally
|
|
{
|
|
if(module)
|
|
{
|
|
module.destroy();
|
|
}
|
|
}
|
|
};
|
|
};
|