From bd8b74551b64e740ca27510406d26bd82ae74c38 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sun, 17 Jun 2018 08:57:43 -0600 Subject: [PATCH] sandbox: Try to start the RAM buffer at a particular address Use a starting address of 256MB which should be available. This helps to make sandbox RAM buffers pointers more recognisable. Signed-off-by: Simon Glass --- arch/sandbox/cpu/os.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c index 07e46471fe5..325ded51d8a 100644 --- a/arch/sandbox/cpu/os.c +++ b/arch/sandbox/cpu/os.c @@ -174,7 +174,12 @@ void *os_malloc(size_t length) struct os_mem_hdr *hdr; int page_size = getpagesize(); - hdr = mmap(NULL, length + page_size, + /* + * Use an address that is hopefully available to us so that pointers + * to this memory are fairly obvious. If we end up with a different + * address, that's fine too. + */ + hdr = mmap((void *)0x10000000, length + page_size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if (hdr == MAP_FAILED)