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comparison dyncall/dyncall_callvm_arm32_arm.c @ 17:17b10cc8ce8b

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- fix for arm on some platforms (e.g. freebsd/arm32, nintendo ds) to keep compiler from overwriting return values in caller-cleanup code
author cslag
date Sat, 01 Aug 2015 19:13:21 +0200
parents 3e629dc19168
children 523c45dfa8fb
comparison
equal deleted inserted replaced
16:29f6ef6b170e 17:17b10cc8ce8b
147 147
148 /* Call. */ 148 /* Call. */
149 void dc_callvm_call_arm32_arm(DCCallVM* in_self, DCpointer target) 149 void dc_callvm_call_arm32_arm(DCCallVM* in_self, DCpointer target)
150 { 150 {
151 DCCallVM_arm32_arm* self = (DCCallVM_arm32_arm*)in_self; 151 DCCallVM_arm32_arm* self = (DCCallVM_arm32_arm*)in_self;
152 dcCall_arm32_arm(target, dcVecData(&self->mVecHead), dcVecSize(&self->mVecHead)); 152 // This cast is needed in order for the cleanup code in the caller (this very function) to not
153 // overwrite and use r0 and r1, as we want to pass them back. On some platforms (FreeBSD/arm, Nintendo DS
154 // the compiler generates cleanup code that writes to those registers by assuming dcCall_arm32_arm didn't
155 // use them.
156 ((DClonglong(*)(DCpointer, DCpointer, DCsize))&dcCall_arm32_arm)(target, dcVecData(&self->mVecHead), dcVecSize(&self->mVecHead));
153 } 157 }
154 158
155 159
156 DCCallVM_vt gVT_arm32_arm = 160 DCCallVM_vt gVT_arm32_arm =
157 { 161 {