Some nits:
The "(CPUArchState *)" cast isn't necessary
We should use exec_path, not ts->bprm->argv[0] (the guest argv[0] isn't
necessarily the executable path)
We don't want to call path() here -- exec_path is a host path, and only guest
filename paths need to go through path().
Looking a little more closely at the logic in main.c I wonder if we
actually want:
if (is_proc_myself(pathname, "exe")) {
execfd = qemu_getauxval(AT_EXECFD);
if (execfd) {
return execfd;
}
return get_errno(open(exec_path, flags, mode));
}
Also if you'd like us to apply your patches we'll need at least a
"Signed-off-by: " line from you.
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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.
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