mirror of
https://github.com/yuzu-emu/unicorn.git
synced 2024-12-23 19:15:34 +00:00
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
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mov $0x1000,%edi
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mov $0x1000,%ecx
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xor %eax,%eax
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rep stos %eax,(%edi)
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// Load DWORD [0x4000] with 0xDEADBEEF to retrieve later
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mov $0x4000,%edi
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mov $0xBEEF,%eax
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mov %eax, (%edi)
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// Identify map the first 4MiB of memory
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mov $0x400,%ecx
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mov $0x2000,%edi
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mov $3, %eax
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loop:
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stos %eax,(%edi)
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add $0x1000,%eax
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loop loop
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// Map phyiscal address 0x4000 to cirtual address 0x7FF000
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mov $0x3ffc,%edi
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mov $0x4003,%eax
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mov %eax, (%edi)
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// Add page tables into page directory
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mov $0x1000, %edi
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mov $0x2003, %eax
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mov %eax, (%edi)
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mov $0x1004, %edi
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mov $0x3003, %eax
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mov %eax, (%edi)
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// Load the page directory register
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mov $0x1000, %eax
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mov %eax, %cr3
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// Enable paging
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mov %cr0, %eax
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or $0x80000000, %eax
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// Clear EAX
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mov %eax, %cr0
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//Load using virtual memory address; EAX = 0xBEEF
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xor %eax,%eax
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mov $0x7FF000, %esi
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mov (%esi), %eax
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hlt
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