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</o:shapelayout></xml><![endif]--></head><body lang=KO link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>Hi, all,<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>I set a variable to true just before calling the ramdisk_exeucte_cmd (which is /init in this case) in the kernel_init function, <o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>And added printk in schedule() function so that it prints something it is called and when the previous variable is true.<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>And found the program stops after the schedule function is called. Like this.<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'><o:p> </o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>Hello! i=115<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>Hello! i=116<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>Helloschedule!<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>schedule!<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'><o:p> </o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>I checked the timer interrupt number was given correctly in the device tree (that’s why schedule was called by the timer..).<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>I stopped the experiment to do something else but will resume it next week by adding some prints. <o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>If anyone has any idea about what might be wrong, please tell me.<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>Thanks for reading.<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'><o:p> </o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>Chan Kim<o:p></o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> Chan Kim <ckim@etri.re.kr> <br><b>Sent:</b> Thursday, August 18, 2022 3:02 PM<br><b>To:</b> kernelnewbies@kernelnewbies.org<br><b>Subject:</b> RE: busybox shell doesn't come up or get stuck.. where should I look or how should I debug it?<o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>I had mistakenly omitted </span><span style='font-size:10.0pt;font-family:"Malgun Gothic"'>‘<span lang=EN-US>-static</span>’<span lang=EN-US> option when making init program.(repeated Hello! Print).<o:p></o:p></span></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>So now the board output looks like this.<o:p></o:p></span></p><p class=MsoNormal style='margin-left:33.0pt;mso-para-margin-left:3.0gd;word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>(...)<o:p></o:p></span></p><p class=MsoNormal style='margin-left:33.0pt;mso-para-margin-left:3.0gd;word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>### point 106-1<o:p></o:p></span></p><p class=MsoNormal style='margin-left:33.0pt;mso-para-margin-left:3.0gd;word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>Run /init as init process<o:p></o:p></span></p><p class=MsoNormal style='margin-left:33.0pt;mso-para-margin-left:3.0gd;word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>### point 106-2, ret = 0<o:p></o:p></span></p><p class=MsoNormal style='margin-left:33.0pt;mso-para-margin-left:3.0gd;word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>Hello! i=0<o:p></o:p></span></p><p class=MsoNormal style='margin-left:33.0pt;mso-para-margin-left:3.0gd;word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>Hello! i=1<o:p></o:p></span></p><p class=MsoNormal style='margin-left:33.0pt;mso-para-margin-left:3.0gd;word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>Hello! i=2<o:p></o:p></span></p><p class=MsoNormal style='margin-left:33.0pt;mso-para-margin-left:3.0gd;word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>...<o:p></o:p></span></p><p class=MsoNormal style='margin-left:33.0pt;mso-para-margin-left:3.0gd;word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>Hello! i=115<o:p></o:p></span></p><p class=MsoNormal style='margin-left:33.0pt;mso-para-margin-left:3.0gd;word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>Hello! i=116<o:p></o:p></span></p><p class=MsoNormal style='margin-left:33.0pt;mso-para-margin-left:3.0gd;word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>Hello! i=117<o:p></o:p></span></p><p class=MsoNormal style='margin-left:33.0pt;mso-para-margin-left:3.0gd;word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>He <=== hangs.<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>So the running the </span><span style='font-size:10.0pt;font-family:"Malgun Gothic"'>‘<span lang=EN-US>init</span>’<span lang=EN-US> program (whether it</span>’<span lang=EN-US>s a script or a binary program) is ok.<o:p></o:p></span></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>The binary </span><span style='font-size:10.0pt;font-family:"Malgun Gothic"'>‘<span lang=EN-US>init</span>’<span lang=EN-US> program stops after printing Hello 117 times so there seems to be more basic problem in H/W or device tree. And when the init script ran </span>‘<span lang=EN-US>exec /bin/sh</span>’<span lang=EN-US>, the shell didn</span>’<span lang=EN-US>t start so </span>‘<span lang=EN-US>running exec inside a script</span>’<span lang=EN-US> can have a problem. <o:p></o:p></span></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>If anyone has a suggestion or advice, I welcome it.<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'><o:p> </o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>Thank you!<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'>Chan Kim<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Malgun Gothic"'><o:p> </o:p></span></p></div></div></body></html>