[U-Boot] [PATCH v8 12/30] sandbox: Try to start the RAM buffer at a particular address

[Simon Glass]

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 <sjg at chromium.org>
---

Changes in v8: None
Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None

 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 a1a982af2d..1553aa687d 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -145,7 +145,12 @@ 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, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
 	if (hdr == MAP_FAILED)
 		return NULL;
-- 
2.18.0.rc1.244.gcf134e6275-goog