a3283a92ae
The qualifier allows programmer to directly control how pointers are signed when they are stored in a particular variable. The qualifier takes three arguments: the signing key, a flag specifying whether address discrimination should be used, and a non-negative integer that is used for additional discrimination. ``` typedef void (*my_callback)(const void*); my_callback __ptrauth(ptrauth_key_process_dependent_code, 1, 0xe27a) callback; ``` Co-Authored-By: John McCall rjmccall@apple.com
87 lines
3.9 KiB
C
87 lines
3.9 KiB
C
// RUN: %clang_cc1 -triple arm64-apple-ios -fptrauth-calls -fptrauth-intrinsics -emit-llvm %s -o - | FileCheck %s
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// RUN: %clang_cc1 -triple aarch64-linux-gnu -fptrauth-calls -fptrauth-intrinsics -emit-llvm %s -o - | FileCheck %s
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// Constant initializers for data pointers.
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extern int external_int;
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// CHECK: @g1 = global ptr ptrauth (ptr @external_int, i32 1, i64 56)
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int * __ptrauth(1,0,56) g1 = &external_int;
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// CHECK: @g2 = global ptr ptrauth (ptr @external_int, i32 1, i64 1272, ptr @g2)
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int * __ptrauth(1,1,1272) g2 = &external_int;
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// CHECK: @g3 = global ptr null
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int * __ptrauth(1,1,871) g3 = 0;
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// FIXME: should we make a ptrauth constant for this absolute symbol?
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// CHECK: @g4 = global ptr inttoptr (i64 1230 to ptr)
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int * __ptrauth(1,1,1902) g4 = (int*) 1230;
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// CHECK: @ga = global [3 x ptr] [
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// CHECK-SAME: ptr ptrauth (ptr @external_int, i32 1, i64 712, ptr @ga),
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// CHECK-SAME: ptr ptrauth (ptr @external_int, i32 1, i64 712, ptr getelementptr inbounds ([3 x ptr], ptr @ga, i32 0, i32 1)),
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// CHECK-SAME: ptr ptrauth (ptr @external_int, i32 1, i64 712, ptr getelementptr inbounds ([3 x ptr], ptr @ga, i32 0, i32 2))]
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int * __ptrauth(1,1,712) ga[3] = { &external_int, &external_int, &external_int };
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struct A {
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int * __ptrauth(1,0,431) f0;
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int * __ptrauth(1,0,9182) f1;
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int * __ptrauth(1,0,783) f2;
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};
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// CHECK: @gs1 = global %struct.A {
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// CHECK-SAME: ptr ptrauth (ptr @external_int, i32 1, i64 431),
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// CHECK-SAME: ptr ptrauth (ptr @external_int, i32 1, i64 9182),
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// CHECK-SAME: ptr ptrauth (ptr @external_int, i32 1, i64 783) }
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struct A gs1 = { &external_int, &external_int, &external_int };
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struct B {
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int * __ptrauth(1,1,1276) f0;
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int * __ptrauth(1,1,23674) f1;
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int * __ptrauth(1,1,163) f2;
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};
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// CHECK: @gs2 = global %struct.B {
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// CHECK-SAME: ptr ptrauth (ptr @external_int, i32 1, i64 1276, ptr @gs2),
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// CHECK-SAME: ptr ptrauth (ptr @external_int, i32 1, i64 23674, ptr getelementptr inbounds (%struct.B, ptr @gs2, i32 0, i32 1)),
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// CHECK-SAME: ptr ptrauth (ptr @external_int, i32 1, i64 163, ptr getelementptr inbounds (%struct.B, ptr @gs2, i32 0, i32 2)) }
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struct B gs2 = { &external_int, &external_int, &external_int };
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// Constant initializers for function pointers.
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extern void external_function(void);
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typedef void (*fpt)(void);
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// CHECK: @f1 = global ptr ptrauth (ptr @external_function, i32 1, i64 56)
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fpt __ptrauth(1,0,56) f1 = &external_function;
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// CHECK: @f2 = global ptr ptrauth (ptr @external_function, i32 1, i64 1272, ptr @f2)
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fpt __ptrauth(1,1,1272) f2 = &external_function;
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// CHECK: @fa = global [3 x ptr] [
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// CHECK-SAME: ptr ptrauth (ptr @external_function, i32 1, i64 712, ptr @fa),
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// CHECK-SAME: ptr ptrauth (ptr @external_function, i32 1, i64 712, ptr getelementptr inbounds ([3 x ptr], ptr @fa, i32 0, i32 1)),
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// CHECK-SAME: ptr ptrauth (ptr @external_function, i32 1, i64 712, ptr getelementptr inbounds ([3 x ptr], ptr @fa, i32 0, i32 2))]
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fpt __ptrauth(1,1,712) fa[3] = { &external_function, &external_function, &external_function };
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struct C {
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fpt __ptrauth(1,0,431) f0;
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fpt __ptrauth(1,0,9182) f1;
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fpt __ptrauth(1,0,783) f2;
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};
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// CHECK: @fs1 = global %struct.C {
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// CHECK-SAME: ptr ptrauth (ptr @external_function, i32 1, i64 431),
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// CHECK-SAME: ptr ptrauth (ptr @external_function, i32 1, i64 9182),
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// CHECK-SAME: ptr ptrauth (ptr @external_function, i32 1, i64 783) }
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struct C fs1 = { &external_function, &external_function, &external_function };
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struct D {
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fpt __ptrauth(1,1,1276) f0;
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fpt __ptrauth(1,1,23674) f1;
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fpt __ptrauth(1,1,163) f2;
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};
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// CHECK: @fs2 = global %struct.D {
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// CHECK-SAME: ptr ptrauth (ptr @external_function, i32 1, i64 1276, ptr @fs2),
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// CHECK-SAME: ptr ptrauth (ptr @external_function, i32 1, i64 23674, ptr getelementptr inbounds (%struct.D, ptr @fs2, i32 0, i32 1)),
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// CHECK-SAME: ptr ptrauth (ptr @external_function, i32 1, i64 163, ptr getelementptr inbounds (%struct.D, ptr @fs2, i32 0, i32 2)) }
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struct D fs2 = { &external_function, &external_function, &external_function };
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