d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

make sure that the start and end preloaded MFS markers are

Browse Source 
in contiguous strings, and that the compiler does not optimize them
away because it thinks they are unused.
This commit is contained in:
Luigi Rizzo 2006-01-31 13:35:30 +00:00
parent bdbca4ddae
commit de64f22aa4
1 changed files with 14 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
sys/dev/md/md.c
View File

@ -101,9 +101,19 @@ static int md_debug;
SYSCTL_INT(_debug, OID_AUTO, mddebug, CTLFLAG_RW, &md_debug, 0, "");
#if defined(MD_ROOT) && defined(MD_ROOT_SIZE)
/* Image gets put here: */
static u_char mfs_root[MD_ROOT_SIZE*1024] = "MFS Filesystem goes here";
static u_char end_mfs_root[] __unused = "MFS Filesystem had better STOP here";
/*
* Preloaded image gets put here.
* Applications that patch the object with the image can determine
* the size looking at the start and end markers (strings),
* so we want them contiguous.
*/
static struct {
u_char start[MD_ROOT_SIZE*1024];
u_char end[128];
} mfs_root = {
.start = "MFS Filesystem goes here",
.end = "MFS Filesystem had better STOP here",
};
#endif
static g_init_t g_md_init;
@ -1139,7 +1149,7 @@ g_md_init(struct g_class *mp __unused)
g_topology_unlock();
#ifdef MD_ROOT_SIZE
sx_xlock(&md_sx);
md_preloaded(mfs_root, MD_ROOT_SIZE * 1024);
md_preloaded(mfs_root.start, sizeof(mfs_root.start));
sx_xunlock(&md_sx);
#endif
/* XXX: are preload_* static or do they need Giant ? */