mirror of
https://github.com/yuzu-emu/unicorn.git
synced 2024-10-19 23:38:23 +02:00
da21bd0589
* Move assembly to S files * more assembly files * osx compilation change * makefile mistake * add objcopy from crosstool * use gobjcopy on osx * start cmocka install cleanup * move wget to directory option * move back to cd * fix copy * First cut * free allocated memory * bad idea too much switching between python and c * add debug * cleanup bad size
50 lines
884 B
ArmAsm
50 lines
884 B
ArmAsm
// Zero memory for page directories and page tables
|
|
mov $0x1000,%edi
|
|
mov $0x1000,%ecx
|
|
xor %eax,%eax
|
|
rep stos %eax,(%edi)
|
|
|
|
// Load DWORD [0x4000] with 0xDEADBEEF to retrieve later
|
|
mov $0x4000,%edi
|
|
mov $0xBEEF,%eax
|
|
mov %eax, (%edi)
|
|
|
|
// Identify map the first 4MiB of memory
|
|
mov $0x400,%ecx
|
|
mov $0x2000,%edi
|
|
mov $3, %eax
|
|
loop:
|
|
stos %eax,(%edi)
|
|
add $0x1000,%eax
|
|
loop loop
|
|
|
|
// Map phyiscal address 0x4000 to cirtual address 0x7FF000
|
|
mov $0x3ffc,%edi
|
|
mov $0x4003,%eax
|
|
mov %eax, (%edi)
|
|
|
|
// Add page tables into page directory
|
|
mov $0x1000, %edi
|
|
mov $0x2003, %eax
|
|
mov %eax, (%edi)
|
|
mov $0x1004, %edi
|
|
mov $0x3003, %eax
|
|
mov %eax, (%edi)
|
|
|
|
// Load the page directory register
|
|
mov $0x1000, %eax
|
|
mov %eax, %cr3
|
|
|
|
// Enable paging
|
|
mov %cr0, %eax
|
|
or $0x80000000, %eax
|
|
|
|
// Clear EAX
|
|
mov %eax, %cr0
|
|
|
|
//Load using virtual memory address; EAX = 0xBEEF
|
|
xor %eax,%eax
|
|
mov $0x7FF000, %esi
|
|
mov (%esi), %eax
|
|
hlt
|