Author: juhosg Date: 2016-03-21 14:15:25 +0100 (Mon, 21 Mar 2016) New Revision: 49061
Modified: trunk/target/linux/lantiq/image/lzma-loader/src/head.S Log: lantiq: lzma-loader: fix O32 ABI conformance According to the calling convention of the o32 ABI the caller function must reserve stack space for $a0-$a3 registers in case the callee needs to save its arguments. The assembly startup code does not reserve stack space for these registers thus when the main C function needs to save its arguments, that will cause a stack overflow. Fix the assembly code to reserve stack space for the registers to avoid that. Compile tested only. Signed-off-by: Gabor Juhos <[email protected]> Modified: trunk/target/linux/lantiq/image/lzma-loader/src/head.S =================================================================== --- trunk/target/linux/lantiq/image/lzma-loader/src/head.S 2016-03-21 13:15:22 UTC (rev 49060) +++ trunk/target/linux/lantiq/image/lzma-loader/src/head.S 2016-03-21 13:15:25 UTC (rev 49061) @@ -109,6 +109,9 @@ /* Setup new "C" stack */ la sp, _stack + /* reserve stack space for a0-a3 registers */ + subu sp, 16 + /* jump to the decompressor routine */ la t0, loader_main jr t0 _______________________________________________ openwrt-commits mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-commits
