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| author | Gabor Juhos <juhosg@openwrt.org> | 2016-03-21 13:15:25 +0000 |
|---|---|---|
| committer | Gabor Juhos <juhosg@openwrt.org> | 2016-03-21 13:15:25 +0000 |
| commit | 4d0681d8658547d546e0b4f31d8ead47fecc33b3 (patch) | |
| tree | ce91956c31791a77b13837909a1598c3ef5e39b2 | |
| parent | 395fff6f8b9008339611ad4ab5fc0b067246253b (diff) | |
| download | upstream-4d0681d8658547d546e0b4f31d8ead47fecc33b3.tar.gz upstream-4d0681d8658547d546e0b4f31d8ead47fecc33b3.tar.bz2 upstream-4d0681d8658547d546e0b4f31d8ead47fecc33b3.zip | |
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 <juhosg@openwrt.org>
SVN-Revision: 49061
| -rw-r--r-- | target/linux/lantiq/image/lzma-loader/src/head.S | 3 |
1 files changed, 3 insertions, 0 deletions
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 |