File: main.c

package info (click to toggle)
llvm-toolchain-18 1%3A18.1.8-18
  • links: PTS, VCS
  • area: main
  • in suites: trixie
  • size: 1,908,340 kB
  • sloc: cpp: 6,667,937; ansic: 1,440,452; asm: 883,619; python: 230,549; objc: 76,880; f90: 74,238; lisp: 35,989; pascal: 16,571; sh: 10,229; perl: 7,459; ml: 5,047; awk: 3,523; makefile: 2,987; javascript: 2,149; xml: 892; fortran: 649; cs: 573
file content (18 lines) | stat: -rw-r--r-- 430 bytes parent folder | download | duplicates (15) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
 
#include <stdint.h>

void foo(void) {}
typedef void (*FooPtr)(void);

int main() {
  FooPtr fnptr = foo;
  // Set top byte.
  fnptr = (FooPtr)((uintptr_t)fnptr | (uintptr_t)0xff << 56);
  // Then apply a PAuth signature to it.
  __asm__ __volatile__("pacdza %0" : "=r"(fnptr) : "r"(fnptr));
  // fnptr is now:
  // <8 bit top byte tag><pointer signature><virtual address>

  foo(); // Set break point at this line.

  return 0;
}