diff options
| author | H. Peter Anvin <hpa@linux.intel.com> | 2010-07-19 16:17:04 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-07-19 16:20:23 -0700 |
| commit | db8899d1faa6fc6e3ea8b89684e5a623df9909ed (patch) | |
| tree | b04a876eb9d9f0c8718831875c92f3aca3b16c77 /libinstaller | |
| parent | ccad6e87e9b9a51f3781cc6e4dc045525c5c5342 (diff) | |
| download | syslinux-db8899d1faa6fc6e3ea8b89684e5a623df9909ed.tar.gz | |
dos: change the link procedure to use negative pointers below DGROUP
Use negative pointer values below DGROUP, i.e. for the .payload
segment. This makes it a lot easier to figure out if we are dealing
with pointers that shouldn't come from where they do, since the DGROUP
and .payload segments no longer overlap, and in fact are congruent.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'libinstaller')
| -rw-r--r-- | libinstaller/syslxint.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/libinstaller/syslxint.h b/libinstaller/syslxint.h index f16c2e5c..b8e872a7 100644 --- a/libinstaller/syslxint.h +++ b/libinstaller/syslxint.h @@ -111,8 +111,6 @@ static inline void set_64(uint64_t *p, uint64_t v) */ #ifdef __MSDOS__ -extern uint16_t ldlinux_seg; /* Defined in dos/syslinux.c */ - static inline __attribute__ ((const)) uint16_t ds(void) { @@ -125,7 +123,7 @@ static inline void *set_fs(const void *p) { uint16_t seg; - seg = ldlinux_seg + ((size_t) p >> 4); + seg = ds() + ((size_t) p >> 4); asm volatile ("movw %0,%%fs"::"rm" (seg)); return (void *)((size_t) p & 0xf); } |