That patch will copy the whole of the target executable into a temporary file
without changing any of it -- the fake_open mechanism is really intended for
cases where we need to return modified results. Wouldn't it be easier to just
have something in do_open() that said:
if (is_proc_myself(pathname, "exe")) {
return get_errno(open(exec_path), flags, mode);
}
That will then give the right behaviour for read-only executables and
other error-related corner cases.
(See also the logic in the readlink/readlinkat handling which already
specialcases /proc/self/exe using exec_path.)
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1299190
Title:
Access to /proc/self/exe in linux-user mode
Status in QEMU:
New
Bug description:
This is based on a recent bug in GCC Bugzilla:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60681
It looks like libbacktrace (GCC runtime library used for obtaining
stack traces) uses /proc/self/exe for error reporting. Currently this
is mapped to qemu-arm which effectively disables libbacktrace on
linux-user.
It seems that QEMU already supports /proc/self/{maps,stat,auxv} so
addition of /proc/self/exe may be trivial.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1299190/+subscriptions
