#include <stdio.h>
#include <stdint.h>

/*
$ clang --version
Ubuntu clang version 11.0.0-2~ubuntu20.04.1
$ clang stack_inspect.c
$ a.out
 0: Address 0x7ffe7d80defc contains        3     <- e[0]
 1: Address 0x7ffe7d80df00 contains        7     <- e[1]
 2: Address 0x7ffe7d80df04 contains        5     <- d
 3: Address 0x7ffe7d80df08 contains        9     <- c
 4: Address 0x7ffe7d80df0c contains       2a     <- b
 5: Address 0x7ffe7d80df10 contains 7d80df30     <- saved frame pointer of main (lower 32 bits)
 6: Address 0x7ffe7d80df14 contains     7ffe     <- saved frame pointer of main (upper 32 bits)
 7: Address 0x7ffe7d80df18 contains   4011d3     <- saved return address of main (lower 32 bits)
 8: Address 0x7ffe7d80df1c contains        0     <- saved return address of main (upper 32 bits)

 9: Address 0x7ffe7d80df20 contains 7d80e020     <- STACK pointer (???) (lower 32 bits)
10: Address 0x7ffe7d80df24 contains     7ffe     <- STACK pointer (???) (upper 32 bits)
11: Address 0x7ffe7d80df28 contains        9     <- a
12: Address 0x7ffe7d80df2c contains        0     <- padding (for next 64-bit pointer ^)
13: Address 0x7ffe7d80df30 contains        0     <- saved frame pointer of _start (lower 32 bits)
14: Address 0x7ffe7d80df34 contains        0     <- saved frame pointer of _start (upper 32 bits)
15: Address 0x7ffe7d80df38 contains 9fbb30b3     <- saved return address of _start (lower 32 bits)
16: Address 0x7ffe7d80df3c contains     7f98     <- saved return address of _start (upper 32 bits)
17: Address 0x7ffe7d80df40 contains       71     <- ???
18: Address 0x7ffe7d80df44 contains        0     <- ???
19: Address 0x7ffe7d80df48 contains 7d80e028     <- source information
20: Address 0x7ffe7d80df4c contains     7ffe     <- source information

$ gcc --version
gcc (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0
$ gcc stack_inspect.c
$ a.out                                          # GCC stores local arrays first in the stack, so some things are missing from the start of the output.
                                           9     <- c
                                          2a     <- b
                                                 <- TEXT pointer (???)
                                                 <- TEXT pointer (???)
                                           0     <- padding (for next 64-bit pointer ^)
                                           5     <- d
 0: Address 0x7ffccc6e6e90 contains        3     <- e[0]
 1: Address 0x7ffccc6e6e94 contains        7     <- e[1]
 2: Address 0x7ffccc6e6e98 contains f08e2f00     <- ???
 3: Address 0x7ffccc6e6e9c contains 8c526a01     <- ???
 4: Address 0x7ffccc6e6ea0 contains cc6e6ec0     <- saved frame pointer of main (lower 32 bits)
 5: Address 0x7ffccc6e6ea4 contains     7ffc     <- saved frame pointer of main (upper 32 bits)
 6: Address 0x7ffccc6e6ea8 contains 11c6a221     <- saved return address of main (lower 32 bits)
 7: Address 0x7ffccc6e6eac contains     5582     <- saved return address of main (upper 32 bits)

 8: Address 0x7ffccc6e6eb0 contains cc6e6fb0     <- STACK pointer (???) (lower 32 bits)
 9: Address 0x7ffccc6e6eb4 contains     7ffc     <- STACK pointer (???) (upper 32 bits)
10: Address 0x7ffccc6e6eb8 contains        0     <- padding (for next 64-bit pointer ^)
11: Address 0x7ffccc6e6ebc contains        9     <- a
12: Address 0x7ffccc6e6ec0 contains        0     <- saved frame pointer of _start (lower 32 bits)
13: Address 0x7ffccc6e6ec4 contains        0     <- saved frame pointer of _start (upper 32 bits)
14: Address 0x7ffccc6e6ec8 contains 6f6d70b3     <- saved return address of _start (lower 32 bits)
15: Address 0x7ffccc6e6ecc contains     7fba     <- saved return address of _start (upper 32 bits)
16: Address 0x7ffccc6e6ed0 contains       71     <- ???
17: Address 0x7ffccc6e6ed4 contains        0     <- ???
18: Address 0x7ffccc6e6ed8 contains cc6e6fb8     <- source information
19: Address 0x7ffccc6e6edc contains     7ffc     <- source information
20: Address 0x7ffccc6e6ee0 contains 6f898618     <- ??? (upper 32 bits)
*/

void f(int b, int c) {
    int d = 5;
    uint32_t e[2] = { 3, 7 };

    for (int i = 0; i < 20; i++)
        printf("%2d: Address %p contains %8x\n", i, &e[i], e[0 + i]);
}

int main(void) {
    int a = 9;
    f(42, a);
    return 0;
}