clang/test/Sema/arm-cmse.c

   1 // RUN: %clang_cc1 -triple thumbv8m.base-none-eabi -mcmse -Wno-strict-prototypes -verify %s
   2
   3 typedef void (*callback_ns_1t)(void) __attribute__((cmse_nonsecure_call));
   4 typedef void (*callback_1t)(void);
   5 typedef void (*callback_ns_2t)(void) __attribute__((cmse_nonsecure_call));
   6 typedef void (*callback_2t)(void);
   7
   8 void foo(callback_ns_1t nsfptr, // expected-error{{functions may not be declared with 'cmse_nonsecure_call' attribute}}
   9          callback_1t fptr) __attribute__((cmse_nonsecure_call))
  10 {
  11   callback_1t fp1 = nsfptr; // expected-warning{{incompatible function pointer types initializing 'callback_1t'}}
  12   callback_ns_1t fp2 = fptr; // expected-warning{{incompatible function pointer types initializing 'callback_ns_1t'}}
  13   callback_2t fp3 = fptr;
  14   callback_ns_2t fp4 = nsfptr;
  15 }
  16
  17 static void bar(void) __attribute__((cmse_nonsecure_entry)) // expected-warning{{'cmse_nonsecure_entry' cannot be applied to functions with internal linkage}}
  18 {
  19 }
  20
  21 typedef void nonsecure_fn_t(int) __attribute__((cmse_nonsecure_call));
  22 extern nonsecure_fn_t baz; // expected-error{{functions may not be declared with 'cmse_nonsecure_call' attribute}}
  23
  24 int v0 __attribute__((cmse_nonsecure_call)); // expected-warning {{'cmse_nonsecure_call' only applies to function types; type here is 'int'}}
  25 int v1 __attribute__((cmse_nonsecure_entry)); // expected-warning {{'cmse_nonsecure_entry' attribute only applies to functions}}
  26
  27 void fn0(void) __attribute__((cmse_nonsecure_entry));
  28 void fn1(void) __attribute__((cmse_nonsecure_entry(1)));  // expected-error {{'cmse_nonsecure_entry' attribute takes no arguments}}
  29
  30 typedef void (*fn2_t)(void) __attribute__((cmse_nonsecure_call("abc"))); // expected-error {{'cmse_nonsecure_call' attribute takes no argument}}
  31
  32 union U { unsigned n; char b[4]; } u;
  33
  34 union U xyzzy(void) __attribute__((cmse_nonsecure_entry)) {
  35   return u; // expected-warning {{passing union across security boundary via return value may leak information}}
  36 }
  37
  38 void (*fn2)(int, union U) __attribute__((cmse_nonsecure_call));
  39 void (*fn3)() __attribute__ ((cmse_nonsecure_call));
  40
  41 struct S {
  42   int t;
  43   union {
  44     char b[4];
  45     unsigned w;
  46   };
  47 } s;
  48
  49 void qux(void) {
  50   fn2(1,
  51       u); // expected-warning {{passing union across security boundary via parameter 1 may leak information}}
  52
  53   fn3(
  54        u, // expected-warning {{passing union across security boundary via parameter 0 may leak information}}
  55        1,
  56        s); // expected-warning {{passing union across security boundary via parameter 2 may leak information}}
  57 }