buggy stack
---

#include "malloc.h"

void ctx_start(void** old_sp, void* new_sp);
void ctx_switch(void** old_sp, void* new_sp);

#define FRAME 0x30

void foo(int i) {
    int stack = 0;
    printf("[%d] stack addr: %p\n", i, &stack);

    if (FRAME * i >= 2048) {
        printf("DONE\n");
        return;
    } else foo(i+1);
}

void ctx_entry(void){
    foo(0);
    FATAL("die");
}

int main(int args, char **argv) {
    void * old_sp;
    void *new_sp = malloc(4096);  // <--- BUG
    printf("new_sp: %p\n", new_sp);
    ctx_start(&old_sp, new_sp);
}