generate 32 or 64 bit binary by gcc

-m32

-m64

compile C program that calls Java

ex:

gcc -o test.o -I/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Headers -framework JavaVM test.c -m64

show file is 64 bit or 32 bits

ex:

file test.o

Quartz introduction

drawRect:

drawRect method of UIVew is called when a view needs to redraw itself

we usually add drawing code in this function

run terminal from applescript

use & to combine string

ex:

tell application "Terminal"

activate

repeat with i from 1 to 5

do script with command "cd test\\ " & i & ":ls"

set custom title of window 1 to "test" & i

end repeat

end tell

panic reporter

in Console's log files --> /Library/Logs --> PanicReporter

use ReleaseSCSITask to release SCSITaskIdentifier

because GetSCSITask will increase fNumCommandsOutstanding,

we must use this function to decrease fNumCommandsOutstanding

adjust aio queue length

sysctl -a | grep aio

find property about aio

sudo sysctl -w kern.aiomax=256

sudo sysctl -w kern.aioprocmax=256

sudo sysctl -w kern.aiothreads=256

for linux:

aio-max-nr

ftp command

mput *.js:

put every file that ends with .js

iostat

watch disk performance

ex:

iostat -w 1

display every second

kernel debug

type 14 = page fault

error code: 0: read from a non-present page

2: write to a non-present page

EIP: address of instruction at panic

create symbol file:

/Volumes/KernelDebugKit/createsymbolfiles -s /tmp PanicDriver/build/Debug/PanicDriver.kext

assume 0x223ab275 is EIP address

gdb /Volumes/KernelDebugKit/mach_kernel

--> set kext-symbol-file-path /tmp

--> add-kext ~/test.kext

--> set print asm-demangle on

--> x/i 0x223ab275

find the function mapped to this address

--> disass 0x223ab275

show this function's content

--> info line * 0x223ab275

show the line number of EIP in the function

vifs

edit /etc/fstab

set the disk not automount

UUID=5BFDB0C1-B240-3429-B9B0-20022AFBAA3C /test hfs rw,noauto

transfer visual project to xcode

1. new project -> Standard Tool

2. get visual project from cvs ( not get from visual stdio)

3. copy the files in visual project into this xcode project directory

4. set SCM Repository

driver terminate procedure

requestTerminate

terminate

willTerminate

didTerminate

detach

free

kernel core dump

configure server:

sudo mkdir /PanicDumps

sudo chown root:wheel /PanicDumps

sudo chmod 1777 /PanicDumps

sudo launchctl load -w /Sysytem/Library/LaunchDaemons/com.apple.kdumpd.plist

sudo launchctl list | grep kdump

configure client:

sudo nvram boot-args="debug=0xd44 _panicd_ip=10.10.1.1"

10.10.1.1 is server ip

link with pcap library

-l pcap

unload module sequence

terminate --> stop --> free

driver dependency

set OSBundleCompatibleVersion & CFBundleVersion

set MODULE_VERSION the same as CFBundleVersion in xcode build

kextload -r /tmp test.kext

/tmp is where to find required kext

create jni in xcode

1.set "Header Search Paths"

/System/Library/Frameworks/JavaVM.framework/Headers

2. set "Executable Extensions"

jnilib

notebook 散熱

ELECOM 超冷卻 A4 冷台

the hit list, draw it , tags

mac software

important type for driver

IOReturn: IOKit/IOReturn.h

IOByteCount: IOKit/IOTypes.h

SCSITaskIdentifier: IOKit/scsi/SCSITask.h

IOBufferMemoryDescriptor: IOKit/IOBufferMemoryDescriptor.h

SCSI_Sense_Data: IOKit/scsi/SCSICmds_REQUEST_SENSE_Defs.h

UInt64: libkern/OSTypes.h

NULL: string.h

IO flow

AsyncReadWrite  -->  IssueRead  or IssueWrite

frequent include header in mac driver

string.h:   define NULL

IOKit/IOLib.h:   IOMalloc

IOMalloc

allocate memory in the driver

defined in  IOKit/IOLib.h

ioregistry

close it before unload driver because it may reference to the driver

define macro in xcode

ex:

configuration: Debug

gcc 4.0 processing-> preprocessor macros:   _DEBUG

combine c and c++ for apple driver

set build option:

gcc 4.0 language -->  compile source as -->  c++

info.plist for driver

IOMatchCategory:

set IODefaultMatchCategory to compare with other driver

the driver with higher probe score will win

IOLog

print message in the kernel

the message is stored at /var/log/system.log