From: Simon Glass <sjg@chromium.org>
Date: Sun, 17 Jun 2018 14:57:43 +0000 (-0600)
Subject: sandbox: Try to start the RAM buffer at a particular address
X-Git-Tag: v2025.01-rc5-pxa1908~3276^2~59
X-Git-Url: http://git.dujemihanovic.xyz/html/index.html?a=commitdiff_plain;h=bd8b74551b64e740ca27510406d26bd82ae74c38;p=u-boot.git

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 <sjg@chromium.org>
---

diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 07e46471fe..325ded51d8 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)