In-Reply-To: <[email protected]>
On Fri, 02 Sep 2005 at 22:25:40 -0600, Christopher Friesen wrote:
> One thing I
> don't understand--the function makes calls to other functions including
> printk(), but I don't see those calls listed in the disassembly.
Calls to external functions whose address is not known at compile time
look like this (using 'objdump -d' on my 2.6.10 kernel:)
19fd: e8 fc ff ff ff call 19fe <filp_close+0x4e>
e8 is call relative with 32-bit displacement from start of next instruction.
The displacement points right back at itself (fffffffc == -4)
> EIP is at filp_close+0x64/0xa0
Here:
> 0x00001ac4 <filp_close+100>: mov 0x2c(%eax),%edx <============
> 0x00001ac7 <filp_close+103>: test %edx,%edx
> 0x00001ac9 <filp_close+105>: je 0x1a93 <filp_close+51>
eax is f88ad500 and your illegal access was at f88ad52c
Looks like filp->fops points to unallocated memory and it dies while
trying to access filp->fops->flush here:
if (filp->f_op && filp->f_op->flush) {
__
Chuck
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