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sysenter & sysexit

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copy 2014-07-26 01:24:07 +02:00
parent 3d495d07e5
commit 812d7872b4
2 changed files with 147 additions and 11 deletions
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13
src/cpu.macro.js
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@ -128,6 +128,15 @@ function v86()
this.esp_phys = 0;
/** @type {number} */
this.sysenter_cs = 0;
/** @type {number} */
this.sysenter_esp = 0;
/** @type {number} */
this.sysenter_eip = 0;
/** @type {number} */
this.repeat_string_prefix = REPEAT_STRING_PREFIX_NONE;
@ -496,6 +505,10 @@ v86.prototype.init = function(settings)
this.running = false;
this.stopped = false;
this.sysenter_cs = 0;
this.sysenter_esp = 0;
this.sysenter_eip = 0;
this.segment_prefix = SEG_PREFIX_NONE;
this.repeat_string_prefix = REPEAT_STRING_PREFIX_NONE;
this.flags = flags_default;

145
src/instructions.macro.js
View file

@ -1924,11 +1924,35 @@ unimplemented_sse(0x2E);
unimplemented_sse(0x2F);
// wrmsr
todo_op(0x30);
op(0x30, {
// wrmsr - write maschine specific register
dbg_log("wrmsr ecx=" + h(cpu.reg32[reg_ecx], 8) +
" data=" + h(cpu.reg32[reg_edx], 8) + ":" + h(cpu.reg32[reg_eax], 8), LOG_CPU);
if(cpu.cpl)
{
cpu.trigger_gp(0);
}
var index = cpu.reg32s[reg_ecx];
var low = cpu.reg32s[reg_eax];
var high = cpu.reg32s[reg_edx];
dbg_log("wrmsr ecx=" + h(index >>> 0, 8) +
" data=" + h(high >>> 0, 8) + ":" + h(low >>> 0, 8), LOG_CPU);
switch(index)
{
case IA32_SYSENTER_CS:
cpu.sysenter_cs = low & 0xFFFF;
break;
case IA32_SYSENTER_EIP:
cpu.sysenter_eip = low;
break;
case IA32_SYSENTER_ESP:
cpu.sysenter_esp = low;
break;
}
});
op(0x31, {
@ -1949,18 +1973,117 @@ op(0x31, {
op(0x32, {
// rdmsr - read maschine specific register
dbg_log("rdmsr ecx=" + h(cpu.reg32[reg_ecx], 8), LOG_CPU);
// TODO
cpu.reg32s[reg_eax] = 0;
cpu.reg32s[reg_edx] = 0;
if(cpu.cpl)
{
cpu.trigger_gp(0);
}
var index = cpu.reg32s[reg_ecx];
dbg_log("rdmsr ecx=" + h(index >>> 0, 8), LOG_CPU);
var low = 0;
var high = 0;
switch(index)
{
case IA32_SYSENTER_CS:
low = cpu.sysenter_cs;
break;
case IA32_SYSENTER_EIP:
low = cpu.sysenter_eip;
break;
case IA32_SYSENTER_ESP:
low = cpu.sysenter_esp;
break;
}
cpu.reg32s[reg_eax] = low;
cpu.reg32s[reg_edx] = high;
});
// rdpmc
todo_op(0x33);
// sysenter
todo_op(0x34);
// sysexit
todo_op(0x35);
op(0x34, {
// sysenter
var seg = cpu.sysenter_cs & 0xFFFC;
if(!cpu.protected_mode || seg === 0)
{
cpu.trigger_gp(0);
}
dbg_log("sysenter cs:eip=" + h(seg , 4) + ":" + h(cpu.sysenter_eip >>> 0, 8) +
" ss:esp=" + h(seg + 8, 4) + ":" + h(cpu.sysenter_esp >>> 0, 8), LOG_CPU);
cpu.flags &= ~flag_vm & ~flag_interrupt;
cpu.instruction_pointer = cpu.sysenter_eip;
cpu.reg32s[reg_esp] = cpu.sysenter_esp;
cpu.sreg[reg_cs] = seg;
cpu.segment_is_null[reg_cs] = 0;
cpu.segment_limits[reg_cs] = -1;
cpu.segment_offsets[reg_cs] = 0;
if(!cpu.is_32)
cpu.update_cs_size(true);
cpu.cpl = 0;
cpu.cpl_changed();
cpu.sreg[reg_ss] = seg + 8;
cpu.segment_is_null[reg_ss] = 0;
cpu.segment_limits[reg_ss] = -1;
cpu.segment_offsets[reg_ss] = 0;
cpu.stack_size_32 = true;
cpu.stack_reg = cpu.reg32s;
cpu.reg_vsp = reg_esp;
cpu.reg_vbp = reg_ebp;
});
op(0x35, {
// sysexit
var seg = cpu.sysenter_cs & 0xFFFC;
if(!cpu.protected_mode || cpu.cpl || seg === 0)
{
cpu.trigger_gp(0);
}
dbg_log("sysenter cs:eip=" + h(seg + 16, 4) + ":" + h(cpu.reg32s[reg_edx] >>> 0, 8) +
" ss:esp=" + h(seg + 24, 4) + ":" + h(cpu.reg32s[reg_ecx] >>> 0, 8), LOG_CPU);
cpu.instruction_pointer = cpu.reg32s[reg_edx];
cpu.reg32s[reg_esp] = cpu.reg32s[reg_ecx];
cpu.sreg[reg_cs] = seg + 16 | 3;
cpu.segment_is_null[reg_cs] = 0;
cpu.segment_limits[reg_cs] = -1;
cpu.segment_offsets[reg_cs] = 0;
if(!cpu.is_32)
cpu.update_cs_size(true);
cpu.cpl = 3;
cpu.cpl_changed();
cpu.sreg[reg_ss] = seg + 24 | 3;
cpu.segment_is_null[reg_ss] = 0;
cpu.segment_limits[reg_ss] = -1;
cpu.segment_offsets[reg_ss] = 0;
cpu.stack_size_32 = true;
cpu.stack_reg = cpu.reg32s;
cpu.reg_vsp = reg_esp;
cpu.reg_vbp = reg_ebp;
});
undefined_instruction(0x36);