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ARM: Fix passing arrays to varadic functions 

TinyCC miscompiled

void g(int,...);

void f(void)
{
        char b[4000];
        g(1, 2, 3, 4, b);
}

in two ways:
 1. It didn't align the stack to 8 bytes before the call
 2. It added sizeof(b) to the stack pointer after the call
This commit is contained in:
Daniel Glöckner 2014-03-29 17:50:40 +01:00
parent f272407353
commit 1075087241
1 changed files with 3 additions and 1 deletions
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4
arm-gen.c
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@ -959,7 +959,9 @@ static int assign_regs(int nb_args, int float_abi, struct plan *plan, int *todo)
memset(plan->clsplans, 0, sizeof(plan->clsplans));
for(i = nb_args; i-- ;) {
int j, start_vfpreg = 0;
size = type_size(&vtop[-i].type, &align);
CType type = vtop[-i].type;
type.t &= ~VT_ARRAY;
size = type_size(&type, &align);
size = (size + 3) & ~3;
align = (align + 3) & ~3;
switch(vtop[-i].type.t & VT_BTYPE) {