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port ins*

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This commit is contained in:
Awal Garg 2017-08-02 19:22:23 +05:30 committed by Fabian
parent c8b7c1edf4
commit d96cbd5f7f
3 changed files with 219 additions and 3 deletions
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3
src/browser/starter.js
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@ -194,9 +194,6 @@ function V86Starter(options)
"_load_ldt": function() { return cpu.load_ldt.apply(cpu, arguments); },
"_load_tr": function() { return cpu.load_tr.apply(cpu, arguments); },
"_insb": function() { return cpu.insb.apply(cpu, arguments); },
"_insw": function() { return cpu.insw.apply(cpu, arguments); },
"_insd": function() { return cpu.insd.apply(cpu, arguments); },
"_outsb": function() { return cpu.outsb.apply(cpu, arguments); },
"_outsw": function() { return cpu.outsw.apply(cpu, arguments); },
"_outsd": function() { return cpu.outsd.apply(cpu, arguments); },

3
src/cpu.js
View file

@ -362,6 +362,9 @@ CPU.prototype.wasm_patch = function(wm)
this.scasb = this.wm.funcs['_scasb'];
this.scasw = this.wm.funcs['_scasw'];
this.scasd = this.wm.funcs['_scasd'];
this.insb = this.wm.funcs['_insb'];
this.insw = this.wm.funcs['_insw'];
this.insd = this.wm.funcs['_insd'];
};
CPU.prototype.get_state = function()

216
src/native/string.c
View file

@ -1051,3 +1051,219 @@ void scasd()
}
}
void insb_rep()
{
int32_t port = reg16[DX];
test_privileges_for_io(port, 1);
int32_t dest = get_seg(ES) + get_reg_asize(EDI);
int32_t size = *flags & FLAG_DIRECTION ? -1 : 1;
int32_t count = get_reg_asize(ECX) >> 0;
if(count == 0) return;
int32_t cont = false;
int32_t start_count = count;
int32_t cycle_counter = MAX_COUNT_PER_CYCLE;
int32_t phys_dest = translate_address_write(dest);
if(*paging)
{
cycle_counter = string_get_cycle_count(size, dest);
}
do
{
write8(phys_dest, io_port_read8(port));
phys_dest += size;
cont = --count != 0;
}
while(cont && cycle_counter--);
int32_t diff = size * (start_count - count);
add_reg_asize(EDI, diff);
set_ecx_asize(count);
*timestamp_counter += start_count - count;
if(cont)
{
*instruction_pointer = *previous_ip;
}
diverged();
}
void insb_no_rep()
{
int32_t port = reg16[DX];
test_privileges_for_io(port, 1);
int32_t dest = get_seg(ES) + get_reg_asize(EDI);
int32_t size = *flags & FLAG_DIRECTION ? -1 : 1;
writable_or_pagefault(dest, 1);
safe_write8(dest, io_port_read8(port));
add_reg_asize(EDI, size);
diverged();
}
void insb()
{
if(*prefixes & PREFIX_MASK_REP)
{
insb_rep();
}
else
{
insb_no_rep();
}
}
void insw_rep()
{
int32_t port = reg16[DX];
test_privileges_for_io(port, 2);
int32_t dest = get_seg(ES) + get_reg_asize(EDI);
int32_t size = *flags & FLAG_DIRECTION ? -2 : 2;
int32_t count = get_reg_asize(ECX) >> 0;
if(count == 0) return;
int32_t cont = false;
int32_t start_count = count;
int32_t cycle_counter = MAX_COUNT_PER_CYCLE;
if(!(dest & 1))
{
int32_t single_size = size < 0 ? -1 : 1;
int32_t phys_dest = translate_address_write(dest) >> 1;
if(*paging)
{
cycle_counter = string_get_cycle_count(size, dest);
}
do
{
write_aligned16(phys_dest, io_port_read16(port));
phys_dest += single_size;
cont = --count != 0;
}
while(cont && cycle_counter--);
int32_t diff = size * (start_count - count);
add_reg_asize(EDI, diff);
set_ecx_asize(count);
*timestamp_counter += start_count - count;
}
else
{
do
{
safe_write16(dest, io_port_read16(port));
dest += size;
add_reg_asize(EDI, size);
cont = decr_ecx_asize() != 0;
}
while(cont && cycle_counter--);
}
if(cont)
{
*instruction_pointer = *previous_ip;
}
diverged();
}
void insw_no_rep()
{
int32_t port = reg16[DX];
test_privileges_for_io(port, 2);
int32_t dest = get_seg(ES) + get_reg_asize(EDI);
int32_t size = *flags & FLAG_DIRECTION ? -2 : 2;
writable_or_pagefault(dest, 2);
safe_write16(dest, io_port_read16(port));
add_reg_asize(EDI, size);
diverged();
}
void insw()
{
if(*prefixes & PREFIX_MASK_REP)
{
insw_rep();
}
else
{
insw_no_rep();
}
}
void insd_rep()
{
int32_t port = reg16[DX];
test_privileges_for_io(port, 4);
int32_t dest = get_seg(ES) + get_reg_asize(EDI);
int32_t size = *flags & FLAG_DIRECTION ? -4 : 4;
int32_t count = get_reg_asize(ECX) >> 0;
if(count == 0) return;
int32_t cont = false;
int32_t start_count = count;
int32_t cycle_counter = MAX_COUNT_PER_CYCLE;
if(!(dest & 3))
{
int32_t single_size = size < 0 ? -1 : 1;
int32_t phys_dest = translate_address_write(dest) >> 2;
if(*paging)
{
cycle_counter = string_get_cycle_count(size, dest);
}
do
{
write_aligned32(phys_dest, io_port_read32(port));
phys_dest += single_size;
cont = --count != 0;
}
while(cont && cycle_counter--);
int32_t diff = size * (start_count - count);
add_reg_asize(EDI, diff);
set_ecx_asize(count);
*timestamp_counter += start_count - count;
}
else
{
do
{
safe_write32(dest, io_port_read32(port));
dest += size;
add_reg_asize(EDI, size);
cont = decr_ecx_asize() != 0;
}
while(cont && cycle_counter--);
}
if(cont)
{
*instruction_pointer = *previous_ip;
}
diverged();
}
void insd_no_rep()
{
int32_t port = reg16[DX];
test_privileges_for_io(port, 4);
int32_t dest = get_seg(ES) + get_reg_asize(EDI);
int32_t size = *flags & FLAG_DIRECTION ? -4 : 4;
writable_or_pagefault(dest, 4);
safe_write32(dest, io_port_read32(port));
add_reg_asize(EDI, size);
diverged();
}
void insd()
{
if(*prefixes & PREFIX_MASK_REP)
{
insd_rep();
}
else
{
insd_no_rep();
}
}