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[PATCH] uml: fix linkage of tt mode against NPTL

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With Al Viro <viro@parcelfarce.linux.theplanet.co.uk>

To make sure switcheroo() can execute when we remap all the executable
image, we used a trick to make it use a local copy of errno...  this trick
does not work with NPTL glibc, only with LinuxThreads, so use another
(simpler) one to make it work anyway.

Hopefully, a lot improved thanks to merging with the version of Al Viro
(which had his part of problems, though, i.e.  removing a fix to another
bug and not fixing the problem on i386).

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paolo 'Blaisorblade' Giarrusso
2005-06-21 17:16:25 -07:00
committed by Linus Torvalds
parent b77d6adc92
commit 60b2737de1
10 changed files with 86 additions and 59 deletions
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15
arch/um/kernel/uml.lds.S
View File

@@ -14,19 +14,10 @@ SECTIONS
/* Used in arch/um/kernel/mem.c. Any memory between START and __binary_start
* is remapped.*/
__binary_start = .;
#ifdef MODE_TT
.thread_private : {
__start_thread_private = .;
errno = .;
. += 4;
arch/um/kernel/tt/unmap_fin.o (.data)
__end_thread_private = .;
}
. = ALIGN(4096);
.remap : { arch/um/kernel/tt/unmap_fin.o (.text) }
/* We want it only if we are in MODE_TT. In both cases, however, when MODE_TT
* is off the resulting binary segfaults.*/
#ifdef MODE_TT
.remap_data : { arch/um/sys-SUBARCH/unmap_fin.o (.data .bss) }
.remap : { arch/um/sys-SUBARCH/unmap_fin.o (.text) }
. = ALIGN(4096); /* Init code and data */
#endif