Lines Matching +full:loss +full:- +full:of +full:- +full:signal

9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  * Test that userspace stack is NX. Requires linking with -Wl,-z,noexecstack
20  * Fill the stack with INT3's and then try to execute some of them:
21  * SIGSEGV -- good, SIGTRAP -- bad.
30 #include <signal.h>
41  * This is memset(rsp, 0xcc, -1); but down.
42  * It will SIGSEGV when bottom of the stack is reached.
43  * Byte-size access is important! (see rdi tweak in the signal handler).
54 	"mov $-1, %rcx\n"
57 	"mov $-1, %ecx\n"
66 ".size make_stack1,.-make_stack1\n"
71  * memset(p, 0xcc, -1);
72  * It will SIGSEGV when top of the stack is reached.
82 	"mov $-1, %rcx\n"
84 	"mov $-1, %ecx\n"
93 ".size make_stack2,.-make_stack2\n"
115 	 * Some Linux versions didn't clear DF before entering signal  in sigsegv()
125 		stack_min_addr = ++uc->uc_mcontext.gregs[RDI];  in sigsegv()
129 		uc->uc_mcontext.gregs[RIP] = (uintptr_t)&make_stack2;  in sigsegv()
133 		unsigned long stack_max_addr = uc->uc_mcontext.gregs[RDI];  in sigsegv()
138 		uc->uc_mcontext.gregs[RIP] = stack_max_addr - PAGE_SIZE;  in sigsegv()
141 		/* Stack page is NX -- good, test next page. */  in sigsegv()
142 		uc->uc_mcontext.gregs[RIP] -= PAGE_SIZE;  in sigsegv()
143 		if (uc->uc_mcontext.gregs[RIP] == stack_min_addr) {  in sigsegv()
156 	unsigned long rip = uc->uc_mcontext.gregs[RIP];  in sigtrap()
183 		/* Cap stack at time-honored 8 MiB value. */  in main()
198 		void *p = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);  in main()