dev/i386/fasttrap_isa.c

264 fasttrap_tracepoint_init(proc_t *p, fasttrap_tracepoint_t *tp, user_addr_t pc,
270 	size_t first = MIN(len, PAGE_SIZE - (pc & PAGE_MASK));
288 	if (uread(p, &instr[0], first, pc) != 0)
291 	    uread(p, &instr[first], len - first, pc + first) != 0) {
401 			tp->ftt_dest = pc + tp->ftt_size +
512 			tp->ftt_dest = pc + tp->ftt_size +
521 			tp->ftt_dest = pc + tp->ftt_size +
527 			tp->ftt_dest = pc + tp->ftt_size +
533 			tp->ftt_dest = pc + tp->ftt_size +
541 			tp->ftt_dest = pc + tp->ftt_size +
547 			tp->ftt_dest = pc + tp->ftt_size +
676 fasttrap_return_common(x86_saved_state_t *regs, user_addr_t pc, pid_t pid,
702 	bucket = &fasttrap_tpoints.fth_table[FASTTRAP_TPOINTS_INDEX(pid, pc)];
705 		if (pid == tp->ftt_pid && pc == tp->ftt_pc &&
734 		 * following pc to the top of the stack since it's missing
738 		cpu_core[CPU->cpu_id].cpuc_missing_tos = pc;
744 				     pc - id->fti_probe->ftp_faddr,
748 				     pc - id->fti_probe->ftp_faddr,
958 	user_addr_t pc = regs32->eip - 1;
978 		fasttrap_sigtrap(p, uthread, pc);
1006 	bucket = &fasttrap_tpoints.fth_table[FASTTRAP_TPOINTS_INDEX(pid, pc)];
1012 		if (pid == tp->ftt_pid && pc == tp->ftt_pc &&
1031 	regs32->eip = pc;
1114 	regs32->eip = pc + tp->ftt_size;
1159 				new_pc = pc;
1239 				new_pc = pc + tp->ftt_size;
1267 				new_pc = pc + tp->ftt_size;
1278 				new_pc = pc + tp->ftt_size;
1289 				new_pc = pc;
1294 			new_pc = pc + tp->ftt_size;
1299 			new_pc = pc + tp->ftt_size;
1325 						new_pc = pc;
1333 						new_pc = pc;
1345 			 * a SIGSEGV and reset the pc to emulate what would happen if
1350 				int ret = fasttrap_suword32(addr, (uint32_t)(pc + tp->ftt_size));
1354 					new_pc = pc;
1378 			 *	jmp	<pc + tp->ftt_size>	    5
1388 			 *	<pc + tp->ftt_size>		    8
1394 			 * The %pc is set to a, and curthread->t_dtrace_astpc is set
1396 			 * kernel, trap() will set %pc to curthread->t_dtrace_astpc
1410 				fasttrap_sigtrap(p, uthread, pc); // Should be killing target proc
1411 				new_pc = pc;
1427 			*(uint32_t *)&scratch[i] = pc - addr - 5;
1439 				fasttrap_sigtrap(p, uthread, pc);
1440 				new_pc = pc;
1452 			uthread->t_dtrace_pc = pc;
1453 			uthread->t_dtrace_npc = pc + tp->ftt_size;
1488 			fasttrap_return_common(regs, pc, pid, new_pc);
1491 			ASSERT(uthread->t_dtrace_pc == pc);
1516 	user_addr_t pc = regs64->isf.rip - 1;
1536 		fasttrap_sigtrap(p, uthread, pc);
1565 	bucket = &fasttrap_tpoints.fth_table[FASTTRAP_TPOINTS_INDEX(pid, pc)];
1571 		if (pid == tp->ftt_pid && pc == tp->ftt_pc &&
1590 	regs64->isf.rip = pc;
1658 	regs64->isf.rip = pc + tp->ftt_size;
1701 				new_pc = pc;
1781 				new_pc = pc + tp->ftt_size;
1809 				new_pc = pc + tp->ftt_size;
1820 				new_pc = pc + tp->ftt_size;
1831 				new_pc = pc;
1836 			new_pc = pc + tp->ftt_size;
1841 			new_pc = pc + tp->ftt_size;
1867 						new_pc = pc;
1873 						new_pc = pc;
1885 			 * a SIGSEGV and reset the pc to emulate what would happen if
1890 				int ret = fasttrap_suword64(addr, pc + tp->ftt_size);
1894 					new_pc = pc;
1918 			 *	jmp	<pc + tp->ftt_size>	    5
1928 			 *	<pc + tp->ftt_size>		    8
1934 			 * The %pc is set to a, and curthread->t_dtrace_astpc is set
1936 			 * kernel, trap() will set %pc to curthread->t_dtrace_astpc
1981 			 *	<pc + tp->ftt_size>		    8
1994 				fasttrap_sigtrap(p, uthread, pc); // Should be killing target proc
1995 				new_pc = pc;
2055 				*reg = pc + tp->ftt_size;
2063 			 * %rip-relative branch that loads the 64-bit pc value
2072 			*(uint64_t *)&scratch[i] = pc + tp->ftt_size;
2084 				fasttrap_sigtrap(p, uthread, pc);
2085 				new_pc = pc;
2097 			uthread->t_dtrace_pc = pc;
2098 			uthread->t_dtrace_npc = pc + tp->ftt_size;
2134 			fasttrap_return_common(regs, pc, pid, new_pc);
2137 			ASSERT(uthread->t_dtrace_pc == pc);
2174 	user_addr_t pc = uthread->t_dtrace_pc;
2200 	 * will correctly set %pc after we return.
2203 		regs64->isf.rip = pc;
2205 		regs32->eip = pc;
2207 	fasttrap_return_common(regs, pc, p->p_pid, npc);