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| author | Gabor Juhos <juhosg@openwrt.org> | 2016-03-21 13:15:29 +0000 |
|---|---|---|
| committer | Gabor Juhos <juhosg@openwrt.org> | 2016-03-21 13:15:29 +0000 |
| commit | 3bcad081e620d7ba52d100e980f5a488f71943d2 (patch) | |
| tree | f8a9537dc9d8667091445b4b22b690cdd0ef1b73 /target/linux/ramips/image | |
| parent | 61427275610d3a91af2620d8586c2849b7b44e47 (diff) | |
| download | master-187ad058-3bcad081e620d7ba52d100e980f5a488f71943d2.tar.gz master-187ad058-3bcad081e620d7ba52d100e980f5a488f71943d2.tar.bz2 master-187ad058-3bcad081e620d7ba52d100e980f5a488f71943d2.zip | |
ramips: 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.
Untested. It seems that the lzma-loader is not used at all?
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@49062 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ramips/image')
| -rw-r--r-- | target/linux/ramips/image/lzma-loader/src/head.S | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/target/linux/ramips/image/lzma-loader/src/head.S b/target/linux/ramips/image/lzma-loader/src/head.S index 543996a0da..47a7c9bd63 100644 --- a/target/linux/ramips/image/lzma-loader/src/head.S +++ b/target/linux/ramips/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 |