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authorShinya Kuribayashi <shinya.kuribayashi@necel.com>2007-10-21 10:55:36 +0900
committerShinya Kuribayashi <skuribay@ruby.dti.ne.jp>2007-10-21 10:55:36 +0900
commit22069215eb7adf5a3888bf7c7784ea9d70a72cd0 (patch)
tree12fe5fd8d2a5a2009e0a910b3c2bd9011de0e575 /board/incaip
parentcbf2323b5b8285ea01acba7bbb905a3162d9b021 (diff)
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[MIPS] Fix $gp usage
Now we load $gp with _GLOBAL_OFFSET_TABLE_, but this is incorrect use. As a general principle, we should use _gp for $gp. Thanks to linker script's help we fortunately have _gp which equals to _GLOBAL_OFFSET_TABLE_. But once _gp gets out of alignment, we will not be able to access to GOT entires, global variables and procedure entry points. The right thing to do is to use _gp. This patch also introduce a new symbol `.gpword _GLOBAL_OFFSET_TABLE_' which holds the offset from _gp. When updating GOT entries, we use this offset and _gp to calculate the final _GLOBAL_OFFSET_TABLE_. This patch is originally submitted by Vlad Lungu <vlad@comsys.ro>, then I made some change to leave over num_got_entries. Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi@necel.com> Cc: Vlad Lungu <vlad@comsys.ro>
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