"육갑떨다" 가 무슨 말인가요?

Source: http://kin.naver.com/detail/detail.php?d1id=11&dir_id=110104&eid=3i8jMwcWeXDe9iHHkc3EG+iPyP19OgpT&qb=urS9xSDAsLCpwLsgtrO02Q==&pid=f5eovdoi5UNsstQ2Pn0sss--248675&sid=SJRn8DYilEgAAGWJkO0

'육갑떨다'가 무슨 말인가요?


어려운 일을 하고 있다는 말입니다.
흔히 육십갑을 하려면 두 손으로 천간(갑을병정무기경신임계)과
지지(자축인묘진사오미신유술해)를 집어 갑니다.

그래서 그 한번이 다 돌면 육십갑이고,
그 갑이 처음으로 돌아왔다고 해서 육십번째 생일이 회갑이지요.

그런데 손가락이 한두개 없는 병신(이런 말은 설명상 어쩔 수 없군요)이
그 육십갑을 집을려고 하니 옆에서 보면 얼마나 웃기겠습니까?

그래서 파생된 욕이 "병신 육갑떠네'입니다.
앞사람 설명은 그냥 육갑떤다는 말의 설명이고,
욕으로 쓸 때는 꼭 같이 붙어서 "병신 육갑떠네"로 되어 있지요.

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Cheers,
June.

너를 생각하며

- 고도원의 아침편지

너를 생각하며


모래알 하나를 보고도
너를 생각했지
풀잎 하나를 보고도
너를 생각했지
너를 생각하게 하지 않는 것은
이 세상에 없어
너를 생각하는 것이
나의 일생이었지


- 정채봉의 시《너를 생각하는 것이 나의 일생이었지》(전문)에서 -


* 사랑의 대상에게 보내는 최고의 고백입니다.
그 고백의 대상이 같은 하늘 아래 있다는 사실만으로도
감사한 일입니다. 살맛이 납니다. 감동이 출렁입니다.
'너'를 생각하며 기쁨의 눈물을 흘립니다.
'너'를 생각할 때마다 행복에 젖습니다.
(2004년8월26일자 앙코르메일)

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내 너에겐 처음은 그냥 스치듯, 짧은 문장...
왜그리 강물이 빨랐던 걸까...
잔잔해진 바람, 나뭇잎은 이제 흘러가는건가?...
잡고 싶지만, 잡고 싶지만... 용기가 나지 않구나...
그냥 이대로 보고만 있어야 하는건지...
또 이렇게 시간이 흘러 가겠지...

Cheers,
June

entry point가 되는 _start 함수 구현

entry point가 되는 _start 함수 구현

Source:
http://honeypod.blogspot.com/2007/12/dynamically-linked-hello-world-for.html
http://socmaster.homelinux.org/~dasomoli/blog/114


entry point가 되는 _start 함수 구현


Dynamically linked "Hello, world!" for Android

This article describes the step-by-step procedure to compile and run the dynamically linked "Hello, world!" for Android. I confirmed this procedure only on my host (Fedora 8). Sorry for Windows and Mac users.

I would like to appreciate developers who posted useful messages on Android Developers and Android Internal news groups. Especially I would like to thank to Benno who provided busybox and strace binary which work on Android.

I would like to suggest you to read the "Native C applications for Android" written by Benno before reading this article.

I hope this article is useful for all Android developers.


1. Get toolchains from CodeSourcery(Choose ARM GNU/Linux and IA32 GNU/Linux). The following description assumes that the bin directory of toolchains is added to your PATH.

2. Get strace, busybox and system image of Android from Benno's site. Copy strace and busybox to the runnning emulator. Deploy the system image on your disk. The following description assumes the system image is deployed under ~/tmp/android.

3. Prepare source files.

hello.c:

#include

int main(int argc, char **argv) {
printf("Hello, world!\n");
return 0;
}

start.c:

#include
extern int main(int argc, char **argv);

void _start(int argc, char **argv)
{
exit (main (argc, argv));
}



4. Compile these source files.

$ arm-none-linux-gnueabi-gcc -c hello.c
$ arm-none-linux-gnueabi-gcc -c start.c
$ arm-none-linux-gnueabi-ld \
--entry=_start \
--dynamic-linker /system/bin/linker -nostdlib \
-rpath /system/lib -rpath ~/tmp/android/system/lib \
-L ~/tmp/android/system/lib -lc -o hello hello.o start.o



The --entry option gives the entry point of program. You can omit this option in this case because the default is _start. The --dynamic-linker option gives the place of dynamic linker. Give it from the viewpoint of the running program on Android. The -nostdlib option prevents ld from searching other library paths rather than the ones given on the command line. The first -rpath gives the place where dynamic linker search libraries. Give it from the viewpoint of the running program on Android. The second -rpath gives the place where ld search libraries needed by the library which has already loaded. Give it from the viewpoint of ld on your host.The -L option the place where ld searches the library which is given by -l option at compile time.


5. Copy binary to Android. The following description assumes that there is /data/hello directory on Android. The '#' is the prompt of Android shell.

$ adb push hello /data/hello/
# cd /data/hello
# ./hello Hello, world!



6. Check by strace whether the program ends in success.

# strace ./hello
execve("./hello", ["./hello"], [/* 9 vars */]) = 0
getpid() = 1803
syscall_983045(0xb0016b48, 0xb0013760, 0x3e4, 0, 0xbea0ae48, 0x1, 0, 0xf0005,
0xb0013760, 0, 0, 0xbea0ae44, 0, 0xbea0adf8, 0xb0000d89, 0xb00016ec, 0x10,
0xb0016b48, 0, 0, 0, 0xeb48, 0xcd1f8, 0xcd1d0, 0, 0, 0, 0, 0, 0, 0, 0) = 0
gettid() = 1803
sigaction(SIGILL, {0xb0001469, [], SA_RESTART}, {SIG_DFL}, 0) = 0
sigaction(SIGABRT, {0xb0001469, [], SA_RESTART}, {SIG_DFL}, 0) = 0
sigaction(SIGBUS, {0xb0001469, [], SA_RESTART}, {SIG_DFL}, 0) = 0
sigaction(SIGFPE, {0xb0001469, [], SA_RESTART}, {SIG_DFL}, 0) = 0
sigaction(SIGSEGV, {0xb0001469, [], SA_RESTART}, {SIG_DFL}, 0) = 0
sigaction(SIGSTKFLT, {0xb0001469, [], SA_RESTART}, {SIG_DFL}, 0) = 0
open("libc.so", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or
directory)
open("/system/lib/libc.so", O_RDONLY|O_LARGEFILE) = 3
lseek(3, -8, SEEK_END) = 231908
read(3, "\0\0\340\257PRE ", 8) = 8
mmap2(0xafe00000, 233472, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE, 3, 0) =
0xafe00000
close(3) = 0
mmap2(0xafe39000, 45056, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0,
0) = 0xafe39000
mprotect(0xafe00000, 221184, PROT_READ|PROT_EXEC) = 0
mprotect(0, 0, PROT_READ|PROT_EXEC) = 0
fstat64(1, {st_mode=S_IFREG|0666, st_size=1337, ...}) = 0
brk(0) = 0x11000
brk(0x11000) = 0x11000
brk(0x13000) = 0x13000
exit_group(0) = ?
Process 1803 detached



You see exit_group(0) at the end. The program ended in success.

7. To see memory map, modify hello.c.


#include
#include

int main(int argc, char **argv) {
printf("Hello, world!\n");
for(;;) sleep(1); // Zzz...
return 0;
}



This program sleeps until killed.

# ./hello &
# Hello, world!

# ps | grep hello
root 1944 450 472 184 00000000 00008318 R ./hello
# cat /proc/1944/maps
00008000-00009000 r-xp 00000000 1f:01 775 /data/hello/hello
00010000-00011000 rw-p 00000000 1f:01 775 /data/hello/hello
00011000-00013000 rwxp 00011000 00:00 0 [heap]
afe00000-afe36000 r-xp 00000000 1f:00 365 /system/lib/libc.so
afe36000-afe39000 rwxp 00036000 1f:00 365 /system/lib/libc.so
afe39000-afe44000 rw-p afe39000 00:00 0
b0000000-b0014000 rwxp 00000000 1f:00 272 /system/bin/linker
b0014000-b0019000 rwxp b0014000 00:00 0
bea6f000-bea84000 rw-p befeb000 00:00 0 [stack]

# kill 1944

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Cheers,
June