Thread: Stack underflow

Hi, I'm trying to get some insight on what could be causing a stack underflow error. I have some code that looks like

Code:

void * func1(a_struct s)
{

 .....

 printf("s = 0x%p.\n", s);
 printf("&s = 0x%p.\n", &s);

 foo = func2(s);

 .....

 return foo;
}

void * func2(a_struct s)
{
 printf("s = 0x%p.\n", s);
 printf("&s = 0x%p.\n", &s);

 ......

return foo;
}

func1 prints out 's' just fine but in func2 I get a stack underflow when trying to print s or &s. I can tell it's an underflow from looking at the assembly. A store instruction is getting called to store a register val just before the start of the stack. This happens with any kind of reference to 's' in func2.

Anyone have any idea what could be going on?