From: Gabor Juhos Date: Mon, 21 Mar 2016 13:15:25 +0000 (+0000) Subject: lantiq: lzma-loader: fix O32 ABI conformance X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fstaging%2Fmkresin.git;a=commitdiff_plain;h=4d0681d8658547d546e0b4f31d8ead47fecc33b3 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 SVN-Revision: 49061 --- diff --git a/target/linux/lantiq/image/lzma-loader/src/head.S b/target/linux/lantiq/image/lzma-loader/src/head.S index 543996a0da..47a7c9bd63 100644 --- a/target/linux/lantiq/image/lzma-loader/src/head.S +++ b/target/linux/lantiq/image/lzma-loader/src/head.S @@ -109,6 +109,9 @@ __bss_check: /* 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