Date: Fri, 8 Feb 2002 15:07:20 -0500 (EST) From: Andrew Gallatin <gallatin@cs.duke.edu> To: John Polstra <jdp@polstra.com> Cc: obrien@freebsd.org, freebsd-alpha@freebsd.org Subject: RE: more on recent current alpha rtld/binutils breakage. Message-ID: <15460.12280.422482.620276@grasshopper.cs.duke.edu> In-Reply-To: <XFMail.020208094643.jdp@polstra.com> References: <15460.3286.546477.700440@grasshopper.cs.duke.edu> <XFMail.020208094643.jdp@polstra.com>
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I put a tsleep in the trapsignal path and was able to print out the
map.
For this crash:
fatal user trap:
trap entry = 0x2 (memory management fault)
faulting va = 0x7540
type = access violation
cause = instruction fetch
pc = 0x7540
ra = 0x1600193a0
sp = 0xfffffe000b7e9e58
usp = 0x11fff6c8
curthread = 0xfffffe000b343200
pid = 287, comm = du
The map looks like this at the time of the trap:
% cat /proc/287/map
0x11fe0000 0x12000000 1 0 0xfffffe000b790b40 rwx 1 0 0x2180 NCOW NNC default
0x120000000 0x120004000 1 0 0xfffffe000b7912c0 r-x 1 0 0x0 COW NC vnode
0x120012000 0x120014000 1 0 0xfffffe000b7b2640 rwx 1 0 0x2180 NCOW NNC default
0x160012000 0x16002e000 12 0 0xfffffe000b791b80 r-x 2 0 0x0 COW NC vnode
0x16003c000 0x16003e000 0 0 0xfffffe000b791b80 rwx 2 0 0x0 COW NC vnode
0x16003e000 0x160042000 1 0 0xfffffe000b791860 rwx 1 0 0x2180 NCOW NNC default
From the size of the rtld text (0x1b8a8) it certainly looks like the
kernel has loaded it in the range 0x160012000-0x16002e000 above.
Working on that assumption, the ra is at 0x1600193a0 - 0x160012000
or 0x73a0 byts into the file. From nm, this puts the ra in
rtld_start:
<..>
0000000000007340 T _rtld_start
00000000000073e0 T _rtld_bind_start
<..>
So its like the _rtld function hasn't been relocated.
Drew
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