From: Chris Zankel Date: Tue, 21 Apr 2009 07:34:15 +0000 (-0700) Subject: xtensa: Fix linker script to include .literal sections X-Git-Tag: linux-omap-v2.6.30-rc6~15^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=78f3cdfa2ac0aa2b72b3ee7e4b3c3e550230179f;p=pandora-kernel.git xtensa: Fix linker script to include .literal sections Fix resembles implementation from Marc Gauthier and Piet Denaly: In the Xtensa architecture, assembly generates literals which must always precede the code (the L32R instruction that loads them only uses negative PC-relative offsets). For any *.text section, literals are placed in a corresponding *.literal section. The linker script (vmlinux.lds) must place these in the correct order. It must also combine them, when the *.text section can be larger than L32R's 256 kB range. For example, this doesn't work: *(.literal) *(.text) because L32R instructions at the end of .text can't reach the literals. The linker can solve this if they are combined in parentheses, like this: *(.literal .text) because it is now allowed mix literals in .text to bring them in range. None of this is done by standard vmlinux.lds.h macros such as TEXT_TEXT and INIT_TEXT. To avoid replicating the logic of that header file, we instead post-process the generated linker script to convert *(xxx.text) to *(xxx.literal xxx.text) for the following text sections: .text .ref.text .*init.text .*exit.text .text.* using a sed script. To do this we must override the default rule for vmlinux.lds (see scripts/Makefile.build and the top-level Makefile) to insert this extra step. Signed-off-by: Marc Gauthier Signed-off-by: Pete Delaney Signed-off-by: Chris Zankel --- Reading git-diff-tree failed