82 lines
1.1 KiB
NASM
82 lines
1.1 KiB
NASM
bits 64
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section .text
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global _syscall_encode_color
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_syscall_encode_color:
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xor rax, rax
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and edi, 0xff
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and dx, 0xff
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shl si, 8
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shl edx, 16
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or di, si
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or edi, edx
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syscall
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ret
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global _syscall_get_framebuffer
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_syscall_get_framebuffer:
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push rcx
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push rdx
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push rsi
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push rdi
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mov rax, 1
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syscall
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pop rcx
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mov qword [rcx], rax
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pop rcx
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mov dword [rcx], edi
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pop rcx
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shr rdi, 32
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mov dword [rcx], edi
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pop rcx
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mov dword [rcx], esi
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ret
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global _syscall_open_file
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_syscall_open_file:
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mov rax, 2
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push rdx
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syscall
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pop rdx
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mov qword [rdx], rdi
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ret
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global _syscall_get_file_length
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_syscall_get_file_length:
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mov rax, 3
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push rsi
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syscall
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pop rsi
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mov qword [rsi], rdi
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ret
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global _syscall_read_from_file
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_syscall_read_from_file:
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mov rax, 4
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push rcx
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push rdx
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push rsi
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push rdi
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mov rdi, rsp
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syscall
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add rsp, 32
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ret
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global _syscall_end_this_process
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_syscall_end_this_process:
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mov rax, 5
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syscall
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;does not return
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global _syscall_get_new_pages
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_syscall_get_new_pages:
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mov rax, 6
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syscall
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ret
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global _syscall_close_file
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_syscall_close_file:
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mov rax, 7
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syscall
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ret
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