From: notaz <notasas@gmail.com>
Date: Wed, 27 Jan 2010 15:16:25 +0000 (+0000)
Subject: bugfixes related to mmap usage for ROM
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1ed480497a9adb926b9b70a2bbf542d43e8b3d54;p=libpicofe.git

bugfixes related to mmap usage for ROM

git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@867 be3aeb3a-fb24-0410-a615-afba39da0efa
---

diff --git a/linux/plat.c b/linux/plat.c
index 492007c..f5742b9 100644
--- a/linux/plat.c
+++ b/linux/plat.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE
 #include <stdio.h>
 #include <string.h>
 #include <dirent.h>
@@ -112,8 +113,9 @@ int plat_wait_event(int *fds_hnds, int count, int timeout_ms)
 void *plat_mmap(unsigned long addr, size_t size)
 {
 	void *req, *ret;
+
 	req = (void *)addr;
-	ret = mmap(req, size, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0);
+	ret = mmap(req, size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
 	if (ret == MAP_FAILED)
 		return NULL;
 	if (ret != req)
@@ -122,6 +124,19 @@ void *plat_mmap(unsigned long addr, size_t size)
 	return ret;
 }
 
+void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
+{
+	void *ret;
+
+	ret = mremap(ptr, oldsize, newsize, MREMAP_MAYMOVE);
+	if (ret == MAP_FAILED)
+		return NULL;
+	if (ret != ptr)
+		printf("warning: mremap moved: %p -> %p\n", ptr, ret);
+
+	return ret;
+}
+
 void plat_munmap(void *ptr, size_t size)
 {
 	munmap(ptr, size);