[V2 01/36] [SFrame-V3] readelf: testsuite: sframe: add new SFrame V2 test

[Jan Beulich]

On 07.01.2026 09:41, Indu Bhagat via Binutils wrote:
> --- /dev/null
> +++ b/binutils/testsuite/binutils-all/x86-64/README-sframe-tests
> @@ -0,0 +1,53 @@
> +The tests in sframe.exp use binary data files:
> +  - test-v2-ET_EXEC.sframe.bz2
> +  - test-v2-ET_REL.sframe.bz2
> +These files are generated using a as/ld supporting SFrame V2 sections (Binutils
> +<= 2.45).  The purpose of those tests is to make sure readelf/objdump support
> +works for SFrame V2.

Well, yes, just that ...

> +The binary files are generated using the following steps.
> +
> +$ cat fake_sort.c
> +/* Keep noinline to ensure a separate FDE is generated */
> +void __attribute__ ((noinline))
> +swapit (int *a, int *b)
> +{
> +  *a = *b;
> +}
> +
> +void fake_sort (int *a, int n)
> +{
> +  if (n > 0)
> +    swapit (&a[0], &a[n-1]);
> +}
> +
> +$ cat sort.c
> +#include <stdio.h>
> +
> +#define ARRAY_LEN 128
> +
> +void fake_sort (int *a, int n);
> +
> +void sort_array (void)
> +{
> +  volatile int data[ARRAY_LEN];
> +  fake_sort ((int *)data, ARRAY_LEN);
> +}
> +
> +int main (void)
> +{
> +  sort_array ();
> +  /* for plt.  */
> +  printf ("done");
> +  return 0;
> +}
> +
> +$ gcc -c sort.c -O2 -Wa,--gsframe 
> +$ gcc -c fake_sort.c -O2 -Wa,--gsframe 
> +$ gcc sort.o fake_sort.o -o sort -O2 -Wa,--gsframe 
> +
> +$ objcopy --dump-section .sframe=test-v2-ET_EXEC.sframe sort
> +$ bzip2 test-v2-ET_EXEC.sframe
> +
> +$ objcopy --dump-section .sframe=test-v2-ET_REL.sframe sort.o
> +$ bzip2 test-v2-ET_REL.sframe

... nothing here uses as or ld. Which as / ld gcc uses people can't normally
control (easily). In a couple of years time (the latest) these instructions
will therefore more only partly helpful, as many people will then use too new
a gcc.

Jan