# HG changeset patch
# User cslag
# Date 1438449201 -7200
# Node ID 17b10cc8ce8bff1ab0af398c731eb562785624fb
# Parent  29f6ef6b170eb4a1b4ab26919d4b0fe9f3e4c5a2
- fix for arm on some platforms (e.g. freebsd/arm32, nintendo ds) to keep compiler from overwriting return values in caller-cleanup code

diff -r 29f6ef6b170e -r 17b10cc8ce8b dyncall/dyncall_callvm_arm32_arm.c
--- a/dyncall/dyncall_callvm_arm32_arm.c	Sat Jul 25 22:45:14 2015 +0200
+++ b/dyncall/dyncall_callvm_arm32_arm.c	Sat Aug 01 19:13:21 2015 +0200
@@ -149,7 +149,11 @@
 void dc_callvm_call_arm32_arm(DCCallVM* in_self, DCpointer target)
 {
   DCCallVM_arm32_arm* self = (DCCallVM_arm32_arm*)in_self;
-  dcCall_arm32_arm(target, dcVecData(&self->mVecHead), dcVecSize(&self->mVecHead));
+  // This cast is needed in order for the cleanup code in the caller (this very function) to not
+  // overwrite and use r0 and r1, as we want to pass them back. On some platforms (FreeBSD/arm, Nintendo DS
+  // the compiler generates cleanup code that writes to those registers by assuming dcCall_arm32_arm didn't
+  // use them.
+  ((DClonglong(*)(DCpointer, DCpointer, DCsize))&dcCall_arm32_arm)(target, dcVecData(&self->mVecHead), dcVecSize(&self->mVecHead));
 }