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Date:      Mon, 18 Jan 1999 11:04:00 +0100 (CET)
From:      talon@lpthe.jussieu.fr (Michel TALON)
To:        freebsd-stable@FreeBSD.ORG
Subject:   linux emulation
Message-ID:  <199901181004.LAA11129@niobe.lpthe.jussieu.fr>

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I have problems with linux emulation of programs compiled under
libc6 under FreeBSD 2.2.8-stable. This happens with simple programs not
using /proc or clone(). I have installed the port linux_lib-2.6.
My old programs using libc5 like Maple continue to work without problem.

Now any new program compiled on a Linux Redhat 5.2 machine and working
on such machine immediately core dump on the FreeBSD box with sigsev.

I have ktraced them and read with linux_kdump. I see correct invocations
of the libc6 and the loader:

8580 tree     NAMI  "/compat/linux/lib/libc.so.6"
  8580 tree     NAMI  "/compat/linux"
  8580 tree     NAMI  "/compat/linux/lib/libc.so.6"
  8580 tree     RET   linux_open 3
  8580 tree     CALL  read(0x3,0xefbfc558,0x1000)

8580 tree     NAMI  "/compat/linux/lib/ld-linux.so.2"
  8580 tree     NAMI  "/compat/linux"
  8580 tree     NAMI  "/compat/linux/lib/ld-linux.so.2"
  8580 tree     RET   linux_open 3
  8580 tree     CALL  read(0x3,0xefbfc558,0x1000)

then a call to getpid as under linux with strace:

  8580 tree     CALL  getpid
  8580 tree     RET   getpid 8580/0x2184
  8580 tree     PSIG  SIGSEGV SIG_DFL
  8580 tree     NAMI  "tree.core"

and the program dies without ever beginning execution. Is this a known
bug or am i doing something wrong?

Thanks

-- 

Michel TALON


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