The first patch in the series fixes a major think-o in the sparc port.
The 64 and 32-bit constants were reversed. Fixing these are required
to avoid a build error in later patches.
For the actual problem, introduce a guest_start_len_valid macro similar
to the existing h2g_valid macro, where we compare the address range
against TARGET_VIRT_ADDR_SPACE_BITS (or ULONG_MAX, depending on the host).
Use this in 3 places in the linux-user memory handling functions, and
also in the generic page_check_range. In the later case, also remove
a mis-conception that I had that page_check_range was already bounds
checked -- these values come directly from a guest syscall and so can
contain any random errant values.
r~
Richard Henderson (7):
target-sparc: Fix TARGET_{PHYS,VIRT}_ADDR_SPACE_BITS.
Add guest_start_len_valid function.
linux-user: Use guest_start_len_valid in msync.
linux-user: Use guest_start_len_valid in mremap.
linux-user: Use guest_start_len_valid in mmap.
Fix zero-length write(2).
Use guest_start_len_valid in page_check_range.
cpu-all.h | 10 ++++++++
exec.c | 12 +++------
linux-user/mmap.c | 65 +++++++++++++++++++++++++++------------------------
target-sparc/cpu.h | 12 ++++----
4 files changed, 54 insertions(+), 45 deletions(-)
