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| author | Richard Weinberger <richard@nod.at> | 2012-01-24 19:09:12 (GMT) |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2012-03-24 23:29:57 (GMT) |
| commit | 12783aa077f81e0dcf1b2f97ed24440048e9f09d (patch) | |
| tree | 648810a36028675185f024ff791b7c9f7b95d815 /arch/um/include | |
| parent | 9310da0bbb826f8b6ed49a5f93092f8452820da0 (diff) | |
| download | linux-12783aa077f81e0dcf1b2f97ed24440048e9f09d.tar.xz | |
um: Switch to large mcmodel on x86_64
x86_64 UML is unable to load modules if more than 504MiB
of memory are used.
This happens because on x86_64 the UML process has a quite high
start address (typically around 0x6000000).
If UML's memory is larger than 504MiB VMALLOC_START happens to be after
0x8000000. This is no problem unless one loads a module which was built
with R_X86_64_32S relocations.
Symbols with a location > 0x8000000 cannot be used with R_X86_64_32S
To deal with this x86_64 UML has to be compiled with -mcmodel=large
such that no R_X86_64_32S relocations are used.
Signed-off-by: Richard Weinberger <richard@nod.at>
Reported-by: 전하늘 <allskyee@gmail.com>
Diffstat (limited to 'arch/um/include')
0 files changed, 0 insertions, 0 deletions