| Message ID | 20231120150833.2552739-8-alex.bennee@linaro.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | random fixes for 8.2 pre-PR (tests, plugins, docs, semihosting) | expand |
On 11/20/23 07:08, Alex Bennée wrote: > A surprising feature of calls like SYS_READC is this can cause QEMU to > indefinitely block as there is no handling for EOF. > > Clarifies: https://gitlab.com/qemu-project/qemu/-/issues/1963 > Signed-off-by: Alex Bennée <alex.bennee@linaro.org> > --- > docs/about/emulation.rst | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/docs/about/emulation.rst b/docs/about/emulation.rst > index 0ad0b86f0d..a2eefe3f3f 100644 > --- a/docs/about/emulation.rst > +++ b/docs/about/emulation.rst > @@ -129,8 +129,9 @@ causing most hypervisors to trap and fault on them. > .. warning:: > Semihosting inherently bypasses any isolation there may be between > the guest and the host. As a result a program using semihosting can > - happily trash your host system. You should only ever run trusted > - code with semihosting enabled. > + happily trash your host system. Some semihosting calls (e.g. > + ``SYS_READC``) can block execution indefinitely. You should only > + ever run trusted code with semihosting enabled. > > Redirection > ~~~~~~~~~~~ Reviewed-by: Richard Henderson <richard.henderson@linaro.org> r~
diff --git a/docs/about/emulation.rst b/docs/about/emulation.rst index 0ad0b86f0d..a2eefe3f3f 100644 --- a/docs/about/emulation.rst +++ b/docs/about/emulation.rst @@ -129,8 +129,9 @@ causing most hypervisors to trap and fault on them. .. warning:: Semihosting inherently bypasses any isolation there may be between the guest and the host. As a result a program using semihosting can - happily trash your host system. You should only ever run trusted - code with semihosting enabled. + happily trash your host system. Some semihosting calls (e.g. + ``SYS_READC``) can block execution indefinitely. You should only + ever run trusted code with semihosting enabled. Redirection ~~~~~~~~~~~
A surprising feature of calls like SYS_READC is this can cause QEMU to indefinitely block as there is no handling for EOF. Clarifies: https://gitlab.com/qemu-project/qemu/-/issues/1963 Signed-off-by: Alex Bennée <alex.bennee@linaro.org> --- docs/about/emulation.rst | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)