3  * mov_ss_trap.c: Exercise the bizarre side effects of a watchpoint on MOV SS
5  * This does MOV SS from a watchpointed address followed by various
6  * types of kernel entries.  A MOV SS that hits a watchpoint will queue
47 unsigned short ss;  variable
66 		dr0 = (unsigned long)&ss;  in enable_watchpoint()
147 	asm volatile ("mov %%ss, %[ss]" : [ss] "=m" (ss));  in main()
148 	printf("\tSS = 0x%hx, &SS = 0x%p\n", ss, &ss);  in main()
158 	asm volatile ("mov %[ss], %[tmp]" : [tmp] "=r" (nr) : [ss] "m" (ss));  in main()
160 	printf("[RUN]\tMOV SS; INT3\n");  in main()
161 	asm volatile ("mov %[ss], %%ss; int3" :: [ss] "m" (ss));  in main()
163 	printf("[RUN]\tMOV SS; INT 3\n");  in main()
164 	asm volatile ("mov %[ss], %%ss; .byte 0xcd, 0x3" :: [ss] "m" (ss));  in main()
166 	printf("[RUN]\tMOV SS; CS CS INT3\n");  in main()
167 	asm volatile ("mov %[ss], %%ss; .byte 0x2e, 0x2e; int3" :: [ss] "m" (ss));  in main()
169 	printf("[RUN]\tMOV SS; CSx14 INT3\n");  in main()
170 	asm volatile ("mov %[ss], %%ss; .fill 14,1,0x2e; int3" :: [ss] "m" (ss));  in main()
172 	printf("[RUN]\tMOV SS; INT 4\n");  in main()
174 	asm volatile ("mov %[ss], %%ss; int $4" :: [ss] "m" (ss));  in main()
177 	printf("[RUN]\tMOV SS; INTO\n");  in main()
180 	asm volatile ("add $1, %[tmp]; mov %[ss], %%ss; into"  in main()
181 		      : [tmp] "+r" (nr) : [ss] "m" (ss));  in main()
185 		printf("[RUN]\tMOV SS; ICEBP\n");  in main()
190 		asm volatile ("mov %[ss], %%ss; .byte 0xf1" :: [ss] "m" (ss));  in main()
194 		printf("[RUN]\tMOV SS; CLI\n");  in main()
196 		asm volatile ("mov %[ss], %%ss; cli" :: [ss] "m" (ss));  in main()
200 		printf("[RUN]\tMOV SS; #PF\n");  in main()
202 		asm volatile ("mov %[ss], %%ss; mov (-1), %[tmp]"  in main()
203 			      : [tmp] "=r" (nr) : [ss] "m" (ss));  in main()
211 		printf("[RUN]\tMOV SS; INT 1\n");  in main()
213 		asm volatile ("mov %[ss], %%ss; int $1" :: [ss] "m" (ss));  in main()
223 		printf("[RUN]\tMOV SS; SYSCALL\n");  in main()
231 			      "mov %[ss], %%ss; syscall\n\t"  in main()
233 			      : "+a" (nr) : [ss] "m" (ss)  in main()
242 	printf("[RUN]\tMOV SS; breakpointed NOP\n");  in main()
243 	asm volatile ("mov %[ss], %%ss; breakpoint_insn: nop" :: [ss] "m" (ss));  in main()
250 		printf("[RUN]\tMOV SS; SYSENTER\n");  in main()
261 		asm volatile ("xorl %%ebp, %%ebp; mov %[ss], %%ss; SYSENTER" : "+a" (nr)  in main()
262 			      : [ss] "m" (ss) : "flags", "rcx"  in main()
272 		printf("[RUN]\tMOV SS; INT $0x80\n");  in main()
275 		asm volatile ("mov %[ss], %%ss; int $0x80"  in main()
276 			      : "+a" (nr) : [ss] "m" (ss)  in main()