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authorPaul Mundt <lethal@linux-sh.org>2008-05-19 19:39:33 +0900
committerPaul Mundt <lethal@linux-sh.org>2008-05-19 19:39:33 +0900
commit336f1d326831873ffab6de5fcec4b3be05103ae0 (patch)
tree832dfd3be4d03275fa0a609df47b5115fa3ebac1 /drivers/serial/8250.h
parent9a33fc217d2248838d52f8ef214b1909073f3eb4 (diff)
sh: Fix up restorer in debug_trap exception return path.
There are a few different types of debug trap exceptions, though now that they are all going through a special jump table, the restorer needs to be unified as well. Presently this is falling through the ret_from_fork path, which more or less does the right thing on SH-3/4 whilst being completely unsuitable on MMU-less targets. Ultimately what we want here is a branch through the platform's restore_all directly, without worrying about the retval being clobbered. We can accomplish that through a branch to __restore_all directly, so switch it so we come back from the jump table and branch to the restorer. This fixes up a recursion in the nommu WARN_ON() path, as well as some other userspace nastiness where said recursion caused serious stack corruption. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/serial/8250.h')
0 files changed, 0 insertions, 0 deletions