target/arm/arm-semi: Don't let the guest close stdin/stdout/stderr
The guest can use the semihosting API to open a handle corresponding to QEMU's own stdin, stdout, or stderr. When the guest closes this handle, we should not close the underlying host stdin/stdout/stderr the way we would do if the handle corresponded to a host fd we'd opened on behalf of the guest in SYS_OPEN. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20200124172954.28481-1-peter.maydell@linaro.org
This commit is contained in:
parent
ea4d7ab5d9
commit
16ab12a936
|
@ -403,6 +403,15 @@ static uint32_t host_closefn(ARMCPU *cpu, GuestFD *gf)
|
||||||
{
|
{
|
||||||
CPUARMState *env = &cpu->env;
|
CPUARMState *env = &cpu->env;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Only close the underlying host fd if it's one we opened on behalf
|
||||||
|
* of the guest in SYS_OPEN.
|
||||||
|
*/
|
||||||
|
if (gf->hostfd == STDIN_FILENO ||
|
||||||
|
gf->hostfd == STDOUT_FILENO ||
|
||||||
|
gf->hostfd == STDERR_FILENO) {
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
return set_swi_errno(env, close(gf->hostfd));
|
return set_swi_errno(env, close(gf->hostfd));
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
Loading…
Reference in a new issue