CentOS - May 2011 - Where is the Centos Linux 5.5 kernel syscall handler for mmap? (Keith Roberts)

Keith Roberts, Thank you for your suggestion about doing a grep of the source
code. We found mmap.S in ../sysdeps/unix/sysv/linux/i386. We looked in mmap.S
and found a lot of assembly code. Could you please tell us if any of the
assembly code call the kernel syscall handler for mmap.s?
     Also, we ran make for the kernel Makefile and we obtained the following
result shown below. Could you please suggest us how to fix the kernel Makeconfig
so that it skips over libc_pic.os? Thank you for your help.
 
 
 
gcc -shared -static-libgcc -Wl,-O1 -Wl,-z,defs -Wl,
-dynamic-linker=/home/frankc/DQT1/glibc-2.9/lib/ld-linux.so.2 
-B/home/frankc/DQTTest5/csu/ -Wl,
--version-script=/home/frankc/DQTTest5/libc.map 
-Wl,-soname=libc.so.6 -Wl,-z,combreloc -Wl,-z,relro -Wl,--hash-style=both 
-nostdlib -nostartfiles -e __libc_main 
-L/home/frankc/DQTTest5 -L/home/frankc/DQTTest5/math 
-L/home/frankc/DQTTest5/elf -L/home/frankc/DQTTest5/dlfcn
-L/home/frankc/DQTTest5/nss
-L/home/frankc/DQTTest5/nis -L/home/frankc/DQTTest5/rt
-L/home/frankc/DQTTest5/resolv
-L/home/frankc/DQTTest5/crypt -L/home/frankc/DQTTest5/nptl -Wl,
-rpath-link=/home/frankc/DQTTest5:/home/frankc/DQTTest5/math:/home/frankc/DQTTest5/elf:
/home/frankc/DQTTest5/dlfcn:/home/frankc/DQTTest5/nss:/home/frankc/DQTTest5/nis:
/home/frankc/DQTTest5/rt:/home/frankc/DQTTest5/resolv:/home/frankc/DQTTest5/crypt:
/home/frankc/DQTTest5/nptl -o /home/frankc/DQTTest5/libc.so 
-T /home/frankc/DQTTest5/shlib.lds /home/frankc/DQTTest5/csu/abi-note.o 
/home/frankc/DQTTest5/elf/soinit.os /home/frankc/DQTTest5/libc_pic.os /
home/frankc/DQTTest5/elf/sofini.os /home/frankc/DQTTest5/elf/interp.os 
/home/frankc/DQTTest5/elf/ld.so -lgcc
/home/frankc/DQTTest5/libc_pic.os: In function `__libc_fork':
/home/frankc/DQT1/glibc-2.9/posix/../nptl/sysdeps/unix/sysv/linux/i386/../fork.c:79:
undefined reference to `__sync_bool_compare_and_swap_4'
/home/frankc/DQTTest5/
gcc -shared -static-libgcc -Wl,-O1 -Wl,-z,defs -Wl,
-dynamic-linker=/home/frankc/DQT1/glibc-2.9/lib/ld-linux.so.2 
-B/home/frankc/DQTTest5/csu/ -Wl,
--version-script=/home/frankc/DQTTest5/libc.map 
-Wl,-soname=libc.so.6 -Wl,-z,combreloc -Wl,-z,relro -Wl,--hash-style=both 
-nostdlib -nostartfiles -e __libc_main 
-L/home/frankc/DQTTest5 -L/home/frankc/DQTTest5/math 
-L/home/frankc/DQTTest5/elf -L/home/frankc/DQTTest5/dlfcn
-L/home/frankc/DQTTest5/nss
-L/home/frankc/DQTTest5/nis -L/home/frankc/DQTTest5/rt
-L/home/frankc/DQTTest5/resolv
-L/home/frankc/DQTTest5/crypt -L/home/frankc/DQTTest5/nptl -Wl,
-rpath-link=/home/frankc/DQTTest5:/home/frankc/DQTTest5/math:/home/frankc/DQTTest5/elf:
/home/frankc/DQTTest5/dlfcn:/home/frankc/DQTTest5/nss:/home/frankc/DQTTest5/nis:
/home/frankc/DQTTest5/rt:/home/frankc/DQTTest5/resolv:/home/frankc/DQTTest5/crypt:
/home/frankc/DQTTest5/nptl -o /home/frankc/DQTTest5/libc.so 
-T /home/frankc/DQTTest5/shlib.lds /home/frankc/DQTTest5/csu/abi-note.o 
/home/frankc/DQTTest5/elf/soinit.os /home/frankc/DQTTest5/libc_pic.os /
home/frankc/DQTTest5/elf/sofini.os /home/frankc/DQTTest5/elf/interp.os 
/home/frankc/DQTTest5/elf/ld.so -lgcc
/home/frankc/DQTTest5/libc_pic.os: In function `__libc_fork':
/home/frankc/DQT1/glibc-2.9/posix/../nptl/sysdeps/unix/sysv/linux/i386/../fork.c:79:
undefined reference to `__sync_bool_compare_and_swap_4'
/home/frankc/DQTTest5/libc_pic.os: In function `__nscd_drop_map_ref':
/home/frankc/DQT1/glibc-2.9/nscd/nscd-client.h:320: undefined reference to
`__sync_fetch_and_add_4'
/home/frankc/DQTTest5/libc_pic.os: In function `nscd_getpw_r':
/home/frankc/DQT1/glibc-2.9/nscd/nscd_getpw_r.c:232: undefined reference to
`__sync_fetch_and_add_4'
/home/frankc/DQTTest5/libc_pic.os: In function `__nscd_drop_map_ref':
/home/frankc/DQT1/glibc-2.9/nscd/nscd-client.h:320: undefined reference to
`__sync_fetch_and_add_4'
/home/frankc/DQTTest5/libc_pic.os: In function `nscd_getgr_r':
/home/frankc/DQT1/glibc-2.9/nscd/nscd_getgr_r.c:321: undefined reference to
`__sync_fetch_and_add_4'
/home/frankc/DQTTest5/libc_pic.os: In function `__nscd_drop_map_ref':
/home/frankc/DQT1/glibc-2.9/nscd/nscd-client.h:320: undefined reference to
`__sync_fetch_and_add_4'
/home/frankc/DQTTest5/libc_pic.os:/home/frankc/DQT1/glibc-2.9/nscd/nscd_gethst_r.c:400:
more undefined references to `__sync_fetch_and_add_4' follow
/home/frankc/DQTTest5/libc_pic.os: In function `__nscd_get_map_ref':
/home/frankc/DQT1/glibc-2.9/nscd/nscd_helper.c:431: undefined reference to
`__sync_val_compare_and_swap_4'
/home/frankc/DQTTest5/libc_pic.os: In function `*__GI___libc_freeres':
/home/frankc/DQT1/glibc-2.9/malloc/set-freeres.c:39: undefined reference to
`__sync_bool_compare_and_swap_4'
collect2: ld returned 1 exit status
: In function `__nscd_drop_map_ref':
/home/frankc/DQT1/glibc-2.9/nscd/nscd-client.h:320: undefined reference to
`__sync_fetch_and_add_4'
/home/frankc/DQTTest5/libc_pic.os: In function `nscd_getpw_r':
/home/frankc/DQT1/glibc-2.9/nscd/nscd_getpw_r.c:232: undefined reference to
`__sync_fetch_and_add_4'
/home/frankc/DQTTest5/libc_pic.os: In function `__nscd_drop_map_ref':
/home/frankc/DQT1/glibc-2.9/nscd/nscd-client.h:320: undefined reference to
`__sync_fetch_and_add_4'
/home/frankc/DQTTest5/libc_pic.os: In function `nscd_getgr_r':
/home/frankc/DQT1/glibc-2.9/nscd/nscd_getgr_r.c:321: undefined reference to
`__sync_fetch_and_add_4'
/home/frankc/DQTTest5/libc_pic.os: In function `__nscd_drop_map_ref':
/home/frankc/DQT1/glibc-2.9/nscd/nscd-client.h:320: undefined reference to
`__sync_fetch_and_add_4'
/home/frankc/DQTTest5/libc_pic.os:/home/frankc/DQT1/glibc-2.9/nscd/nscd_gethst_r.c:400:
more undefined references to `__sync_fetch_and_add_4' follow
/home/frankc/DQTTest5/libc_pic.os: In function `__nscd_get_map_ref':
/home/frankc/DQT1/glibc-2.9/nscd/nscd_helper.c:431: undefined reference to
`__sync_val_compare_and_swap_4'
/home/frankc/DQTTest5/libc_pic.os: In function `*__GI___libc_freeres':
/home/frankc/DQT1/glibc-2.9/malloc/set-freeres.c:39: undefined reference to
`__sync_bool_compare_and_swap_4'
collect2: ld returned 1 exit status 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.centos.org/pipermail/centos/attachments/20110529/0f9859d0/attachment-0005.html>

On 05/29/2011 01:37 AM, Frank Chang wrote:
>     Keith Roberts, Thank you for your suggestion about doing a grep of 
> the source code. We found mmap.S in ../sysdeps/unix/sysv/linux/i386. 
> We looked in mmap.S and found a lot of assembly code. Could you please 
> tell us if any of the assembly code call the kernel syscall handler 
> for mmap.s?
>      Also, we ran make for the kernel Makefile and we obtained the 
> following result shown below. Could you please suggest us how to fix 
> the kernel Makeconfig so that it skips over libc_pic.os? Thank you for 
> your help.
>
1) This is probably the wrong list for these questions. More appropriate 
lists can be found here: http://kernelnewbies.org/ML
2) You may want to look at this web page: 
http://www.makelinux.net/kernel_map
3) http://kernelnewbies.org/

-- 
Benjamin Franz