From: Simon Glass sjg@chromium.org
At present the sandbox RAM buffer is not aligned to any particular address boundary. This makes the internal pointers somewhat random with respect to the associated RAM buffer addresses.
Align the buffer to the page size of the machine to help with this.
Signed-off-by: Simon Glass sjg@chromium.org Signed-off-by: Alexander Graf agraf@suse.de --- arch/sandbox/cpu/os.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c index e3fe017b5f..3067503d51 100644 --- a/arch/sandbox/cpu/os.c +++ b/arch/sandbox/cpu/os.c @@ -143,15 +143,16 @@ void os_tty_raw(int fd, bool allow_sigs) void *os_malloc(size_t length) { struct os_mem_hdr *hdr; + int page_size = getpagesize();
- hdr = mmap(NULL, length + sizeof(*hdr), + hdr = mmap(NULL, length + page_size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if (hdr == MAP_FAILED) return NULL; hdr->length = length;
- return hdr + 1; + return (void *)hdr + page_size; }
void os_free(void *ptr)