ex6.subx.html « linux « html - mu - Soul of a tiny new machine. More thorough tests → More comprehensible and rewrite-friendly software → More resilient society.

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import (
	"errors"

	"git.sr.ht/~sircmpwn/aerc/widgets"
)

func init() {
	register("help", Help)
}

func Help(aerc *widgets.Aerc, args []string) error {
	page := "aerc"
	if len(args) == 2 {
		page = "aerc-" + args[1]
	} else if len(args) > 2 {
		return errors.New("Usage: help [topic]")
	}
	return Term(aerc, []string{"term", "man", page})
}

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Mu - linux/ex6.subx</title> <meta name="Generator" content="Vim/8.1"> <meta name="plugin-version" content="vim8.1_v1"> <meta name="syntax" content="none"> <meta name="settings" content="number_lines,use_css,no_foldcolumn,expand_tabs,line_ids,prevent_copy="> <meta name="colorscheme" content="minimal-light"> <style type="text/css">  </style> <script type='text/javascript'>  </script> </head> <body onload='JumpToLine();'> <a href='https://github.com/akkartik/mu/blob/main/linux/ex6.subx'>https://github.com/akkartik/mu/blob/main/linux/ex6.subx</a> <pre id='vimCodeElement'> 1 # Print out a (global variable) string to stdout. 2 # 3 # To run: 4 # $ bootstrap/bootstrap translate ex6.subx -o ex6 5 # $ bootstrap/bootstrap run ex6 6 # Hello, world! 7 8 == code 9 10 # . op subop mod rm32 base index scale r32 11 # . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes 12 13 Entry: 14 # write(stdout, X, Size) 15 # . fd = 1 (stdout) 16 bb/copy-to-ebx 1/imm32 17 # . initialize X (location to write result to) 18 b9/copy-to-ecx <a href='ex6.subx.html#L31'>X</a>/imm32 19 # . initialize Size 20 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 2/r32/edx <a href='ex6.subx.html#L29'>Size</a>/disp32 . # copy *Size to edx 21 # . syscall 22 e8/call <a href='000init.subx.html#L29'>syscall_write</a>/disp32 23 24 # exit(ebx) 25 e8/call <a href='000init.subx.html#L18'>syscall_exit</a>/disp32 26 27 == data 28 29 Size: # size of string 30 0x0d/imm32 # 13 31 X: # string to print 32 48 65 6c 6c 6f 20 77 6f 72 6c 64 21 0a 00 33 # H e l l o ␣ w o r l d ! newline null 34 35 # . . vim:nowrap:textwidth=0 </pre> </body> </html>