Question

In the following code, A and B are constants defined with #define:

1 typedef struct {

2 int x[A][B]; /* Unknown constants A and B */

3 long y;

4 } str1;

5

6 typedef struct {

7 char array[B];

8 int t;

9 short s[A];

10 long u;

11 } str2;

12

13 void setVal(str1 *p, str2 *q) {

14 long v1 = q-<t;

15 long v2 = q-<u;

16 p-<y = v1+v2;

17 }

gcc generates the following code for setVal:

void setVal(str1 *p, str2 *q) p in %rdi, q in %rsi

1 setVal:

2 movslq 8(%rsi), %rax

3 addq 32(%rsi), %rax

4 movq %rax, 184(%rdi)

5 ret

What are the values of A and B?