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| author | Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> | 2006-02-01 03:06:28 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-01 08:53:23 -0800 |
| commit | 4cd7ed94428babb0cdbf08cc14c257e223186079 (patch) | |
| tree | fd0b8740cefb9d7d8606a82f11f9004484b47fd9 | |
| parent | e5cf888631af95c8022d659d77fb595e0c3ac778 (diff) | |
| download | lwn-4cd7ed94428babb0cdbf08cc14c257e223186079.tar.gz lwn-4cd7ed94428babb0cdbf08cc14c257e223186079.zip | |
[PATCH] uml: skas0-hold-own-ldt fixups for x86-64
In a recent fixup i386 code was copied raw to x86_64 subarch to make it
compile again.
Here there are some little fixups and resyncs needed for it (mainly for
cleanliness sake) - I did an audit and found the rest of the code to be safe.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/asm-um/ldt-x86_64.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/include/asm-um/ldt-x86_64.h b/include/asm-um/ldt-x86_64.h index 57159f12dde2..96b35aada79a 100644 --- a/include/asm-um/ldt-x86_64.h +++ b/include/asm-um/ldt-x86_64.h @@ -39,11 +39,13 @@ typedef struct uml_ldt { } uml_ldt_t; /* - * macros stolen from include/asm-i386/desc.h + * macros stolen from include/asm-x86_64/desc.h */ #define LDT_entry_a(info) \ ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff)) +/* Don't allow setting of the lm bit. It is useless anyways because + * 64bit system calls require __USER_CS. */ #define LDT_entry_b(info) \ (((info)->base_addr & 0xff000000) | \ (((info)->base_addr & 0x00ff0000) >> 16) | \ @@ -54,6 +56,7 @@ typedef struct uml_ldt { ((info)->seg_32bit << 22) | \ ((info)->limit_in_pages << 23) | \ ((info)->useable << 20) | \ + /* ((info)->lm << 21) | */ \ 0x7000) #define LDT_empty(info) (\ @@ -64,6 +67,7 @@ typedef struct uml_ldt { (info)->seg_32bit == 0 && \ (info)->limit_in_pages == 0 && \ (info)->seg_not_present == 1 && \ - (info)->useable == 0 ) + (info)->useable == 0 && \ + (info)->lm == 0) #endif |