Le 19/05/2020 à 20:56, Richard Henderson a écrit : > Executable guest pages are never directly executed by > the host, but do need to be readable for translation. > > Signed-off-by: Richard Henderson <[email protected]> > --- > linux-user/mmap.c | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/linux-user/mmap.c b/linux-user/mmap.c > index 36fd1e2250..84662c3311 100644 > --- a/linux-user/mmap.c > +++ b/linux-user/mmap.c > @@ -76,8 +76,12 @@ static int validate_prot_to_pageflags(int *host_prot, int > prot) > * don't bother transforming guest bit to host bit. Any other > * target-specific prot bits will not be understood by the host > * and will need to be encoded into page_flags for qemu emulation. > + * > + * Pages that are executable by the guest will never be executed > + * by the host, but the host will need to be able to read them. > */ > - *host_prot = prot & (PROT_READ | PROT_WRITE | PROT_EXEC); > + *host_prot = (prot & (PROT_READ | PROT_WRITE)) > + | (prot & PROT_EXEC ? PROT_READ : 0); > > return prot & ~valid ? 0 : page_flags; > } >
Applied to my linux-user-for-5.2 branch. Thanks, Laurent
