Svante Signell, le Thu 19 May 2011 10:17:16 +0200, a écrit : > On Thu, 2011-05-19 at 09:57 +0200, Samuel Thibault wrote: > > Samuel Thibault, le Fri 13 May 2011 21:12:43 +0200, a écrit : > > > This looks extremely odd. Labels like .L430 are not supposed to be > > > external symbols, but file-local symbols. > > > > rgrep tells it's in liblinux.a_de4x5.o, objdump -x -D tells it's in > > de4x5_alloc_rx_buff and the address. gdb's l * 0xaddress tells that it's > > actually from skb_put, the "here" label thing. It looks like a gcc 4.6 > > bug with labels. I've simploy dropped it, panic() triggers the debugger > > which can dump a backtrace anyway. > > Good hunting, looks like the problem was deeply hidden. Did you report > the label bug to gcc upstream?
Ideally it should be reported, yes, but the gnumach shows that it'll be difficult to isolate the issue, since the skb_put inline is used in a lot of places in gnumach, and only one of them triggered the issue. > Can this bug affect other code using labels compiled with gcc-4.6 -O2? Probably. Samuel
