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103 lines
1.4 KiB
103 lines
1.4 KiB
; Collection of Assembly macros to make programming in assembly easier
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; Include it with "%include 'macros.asm'
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section .data
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newline db 0xA,0x0
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; Macro to calculate string length and print to stdout
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%macro printStr 1
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;; Store previous data
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push rax
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push rbx
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push rcx
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push rdx
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push rdi
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push rsi
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;; Move first arg to rax
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mov rax, %1
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;; push rax to stack
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push rax
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;; move 0 to rbx for loop counter
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mov rbx,0
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;; counts letters
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%%printLoop:
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inc rax
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inc rbx
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mov cl,[rax]
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cmp cl,0
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jne %%printLoop
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;; sys_write
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mov rax,1
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mov rdi,1
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pop rsi
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mov rdx,rbx
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syscall
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;; pop values back to registers
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pop rsi
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pop rdi
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pop rdx
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pop rcx
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pop rbx
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pop rax
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%endmacro
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%macro printStrLF 1
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push rax
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mov rax,%1
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printStr rax
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printStr newline
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pop rax
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%endmacro
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%macro printInt 1
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push rax
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push rcx
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push rdx
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push rsi
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mov rax,%1
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mov rcx, 0
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%%divideLoop:
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inc rcx
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mov rdx, 0
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mov rsi, 10
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idiv rsi
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add rdx, 48
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push rdx
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cmp rax, 0
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jnz %%divideLoop
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%%printLoop:
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dec rcx
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mov rax, rsp
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printStr rax
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pop rax
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cmp rcx, 0
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jnz %%printLoop
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pop rsi
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pop rdx
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pop rcx
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pop rax
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%endmacro
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%macro printIntLF 1
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push rax
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mov rax, %1
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printInt rax
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printStr newline
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pop rax
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%endmacro
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%macro exit 1
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mov rax,60
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mov rdi,%1
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syscall
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%endmacro
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