82 lines
1.6 KiB
NASM
82 lines
1.6 KiB
NASM
; Hello Slices!
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%define marg
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%define rcounter_32 ecx
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%define reg8_32 r8d
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%define raccumulator rax
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%define rcounter rcx
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%define rdata rdx
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%define rstack_ptr rsp
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%define rstack_base_ptr rbp
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%define reg9 r9
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%define MS_STD_OUTPUT_HANDLE 11
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struc Slice_Byte
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.ptr: resq 1
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.len: resq 1
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endstruc
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struc Slice_Str8
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.ptr: resq 1
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.len: resq 1
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endstruc
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; Usage: lit %1: <slice_label> %2: <utf-8 literal>
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%macro lit 2
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lit_ %+ %1: db %2
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lit_ %+ %1 %+ _len: equ $ - (lit_ %+ %1)
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%endmacro
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BITS 64 ; Explicitly specify 64-bit mode
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DEFAULT REL ; Use RIP-relative addressing by default
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; kernel32.lib
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extern GetStdHandle
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extern WriteConsoleA
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section .data
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std_out_hndl dq 0
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section .lits progbits noexec nowrite
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lit hello_msg, `Hello Slices\n`
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section .text
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global main
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%define wapi_shadow_width 48
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%macro wapi_shadow_space 0
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push rstack_base_ptr
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mov rstack_base_ptr, rstack_ptr
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sub rstack_ptr, wapi_shadow_width
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%endmacro
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%define wapi_arg4_offset 28
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%define wapi_arg5_offset 32
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%define wapi_write_console_written_chars reg9
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%macro wapi_write_console 2
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mov rcounter,[%1] ; Console Handle
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lea rdata, [%2] ; Slice_Str8.Ptr
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mov reg8_32, %2 %+ _len ; Slice_Str8.Len
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lea reg9, [rstack_ptr + wapi_arg4_offset] ; Written chars
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mov qword [rstack_ptr + wapi_arg5_offset], 0 ; Reserved (must be 0)
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call WriteConsoleA
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%endmacro
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main:
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wapi_shadow_space
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; Setup stdout handle
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mov rcounter_32, -MS_STD_OUTPUT_HANDLE
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call GetStdHandle
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mov [std_out_hndl], raccumulator
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wapi_write_console std_out_hndl, lit_hello_msg
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leave
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ret
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