From: Kostik Belousov [mailto:kostik...@gmail.com]
> Can you look up the source line for kern_sendfile+0x90d in your
> kernel ? Do kgdb kernel.debug, then execute "list *(kern_sendfile+0x90d)".
In my case, it was kern_sendfile+0x6ad (rebuilt with RELENG_7 this weekend).
Here's the output:
(kgdb) list *(kern_sendfile+0x6ad)
0xc0855fdd is in kern_sendfile (atomic.h:160).
155 static __inline int
156 atomic_cmpset_int(volatile u_int *dst, u_int exp, u_int src)
157 {
158 u_char res;
159
160 __asm __volatile(
161 " " MPLOCKED " "
162 " cmpxchgl %2,%1 ; "
163 " sete %0 ; "
164 "1: "
Not much to go on there. I posted a backtrace in a previous email, but the
relevant sections (I think) are:
#14 0xc0855fdd in kern_sendfile (td=0xc771db40, uap=0xc72e2cfc, hdr_uio=0x0,
trl_uio=0x0, compat=0) at atomic.h:160
#15 0xc0856d31 in do_sendfile (td=0xc771db40, uap=0xc72e2cfc, compat=0) at
/usr/src/sys/kern/uipc_syscalls.c:1775
#16 0xc0856dd3 in sendfile (td=0xc771db40, uap=0xc72e2cfc) at
/usr/src/sys/kern/uipc_syscalls.c:1746
#17 0xc0b01365 in syscall (frame=0xc72e2d38) at
/usr/src/sys/i386/i386/trap.c:1094
#18 0xc0ae5960 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:262
#19 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
I'm still going to test the specific boundary, but if there's more information
I can give, let me know!
Jaime
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