[PATCH] Avoid seg fault in sim/cris/sim-if.c

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Typing "target sim" in GDB built with --target=cris-elf, crashes immediately
after being launched with "gdb ./a.out".  The issue is that STATE_PROG_ARGV
may return NULL, and this isn't tested before dereferencing the pointer.

If approved, please could someone commit this for me.
Thanks in advance.

2026-08-01  Roger Sayle  <[email protected]>

ChangeLog
	* sim/cris/sim-if.c (sim_open): Check that prog_argv isn't NULL.



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diff --git a/sim/cris/sim-if.c b/sim/cris/sim-if.c=0A=
index 12c80983208..3babbb058b7 100644=0A=
--- a/sim/cris/sim-if.c=0A=
+++ b/sim/cris/sim-if.c=0A=
@@ -770,8 +770,9 @@ sim_open (SIM_OPEN_KIND kind, host_callback =
*callback, struct bfd *abfd,=0A=
       for (envc =3D 0; environ[envc] !=3D NULL; envc++)=0A=
 	len +=3D strlen (environ[envc]) + 1;=0A=
 =0A=
-      for (i =3D 0; prog_argv[i] !=3D NULL; my_argc++, i++)=0A=
-	len +=3D strlen (prog_argv[i]) + 1;=0A=
+      if (prog_argv !=3D NULL)=0A=
+	for (i =3D 0; prog_argv[i] !=3D NULL; my_argc++, i++)=0A=
+	  len +=3D strlen (prog_argv[i]) + 1;=0A=
 =0A=
       envstart =3D (envtop - len) & ~8191;=0A=
 =0A=

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