dev/i386/fasttrap_isa.c

262 fasttrap_tracepoint_init(proc_t *p, fasttrap_tracepoint_t *tp, user_addr_t pc,
268 	size_t first = MIN(len, PAGE_SIZE - (pc & PAGE_MASK));
286 	if (uread(p, &instr[0], first, pc) != 0)
289 	    uread(p, &instr[first], len - first, pc + first) != 0) {
397 			tp->ftt_dest = pc + tp->ftt_size +
506 			tp->ftt_dest = pc + tp->ftt_size +
515 			tp->ftt_dest = pc + tp->ftt_size +
521 			tp->ftt_dest = pc + tp->ftt_size +
527 			tp->ftt_dest = pc + tp->ftt_size +
535 			tp->ftt_dest = pc + tp->ftt_size +
541 			tp->ftt_dest = pc + tp->ftt_size +
666 fasttrap_return_common(x86_saved_state_t *regs, user_addr_t pc, pid_t pid,
692 	bucket = &fasttrap_tpoints.fth_table[FASTTRAP_TPOINTS_INDEX(pid, pc)];
695 		if (pid == tp->ftt_pid && pc == tp->ftt_pc &&
724 		 * following pc to the top of the stack since it's missing
728 		cpu_core[CPU->cpu_id].cpuc_missing_tos = pc;
734 				     pc - id->fti_probe->ftp_faddr,
738 				     pc - id->fti_probe->ftp_faddr,
948 	user_addr_t pc = regs32->eip - 1;
968 		fasttrap_sigtrap(p, uthread, pc);
996 	bucket = &fasttrap_tpoints.fth_table[FASTTRAP_TPOINTS_INDEX(pid, pc)];
1002 		if (pid == tp->ftt_pid && pc == tp->ftt_pc &&
1021 	regs32->eip = pc;
1104 	regs32->eip = pc + tp->ftt_size;
1149 				new_pc = pc;
1229 				new_pc = pc + tp->ftt_size;
1257 				new_pc = pc + tp->ftt_size;
1268 				new_pc = pc + tp->ftt_size;
1279 				new_pc = pc;
1284 			new_pc = pc + tp->ftt_size;
1289 			new_pc = pc + tp->ftt_size;
1315 						new_pc = pc;
1323 						new_pc = pc;
1335 			 * a SIGSEGV and reset the pc to emulate what would happen if
1340 				int ret = fasttrap_suword32(addr, (uint32_t)(pc + tp->ftt_size));
1344 					new_pc = pc;
1368 			 *	jmp	<pc + tp->ftt_size>	    5
1378 			 *	<pc + tp->ftt_size>		    8
1384 			 * The %pc is set to a, and curthread->t_dtrace_astpc is set
1386 			 * kernel, trap() will set %pc to curthread->t_dtrace_astpc
1400 				fasttrap_sigtrap(p, uthread, pc); // Should be killing target proc
1401 				new_pc = pc;
1417 			*(uint32_t *)&scratch[i] = pc - addr - 5;
1429 				fasttrap_sigtrap(p, uthread, pc);
1430 				new_pc = pc;
1442 			uthread->t_dtrace_pc = pc;
1443 			uthread->t_dtrace_npc = pc + tp->ftt_size;
1478 			fasttrap_return_common(regs, pc, pid, new_pc);
1481 			ASSERT(uthread->t_dtrace_pc == pc);
1506 	user_addr_t pc = regs64->isf.rip - 1;
1526 		fasttrap_sigtrap(p, uthread, pc);
1555 	bucket = &fasttrap_tpoints.fth_table[FASTTRAP_TPOINTS_INDEX(pid, pc)];
1561 		if (pid == tp->ftt_pid && pc == tp->ftt_pc &&
1580 	regs64->isf.rip = pc;
1648 	regs64->isf.rip = pc + tp->ftt_size;
1691 				new_pc = pc;
1771 				new_pc = pc + tp->ftt_size;
1799 				new_pc = pc + tp->ftt_size;
1810 				new_pc = pc + tp->ftt_size;
1821 				new_pc = pc;
1826 			new_pc = pc + tp->ftt_size;
1831 			new_pc = pc + tp->ftt_size;
1857 						new_pc = pc;
1863 						new_pc = pc;
1875 			 * a SIGSEGV and reset the pc to emulate what would happen if
1880 				int ret = fasttrap_suword64(addr, pc + tp->ftt_size);
1884 					new_pc = pc;
1908 			 *	jmp	<pc + tp->ftt_size>	    5
1918 			 *	<pc + tp->ftt_size>		    8
1924 			 * The %pc is set to a, and curthread->t_dtrace_astpc is set
1926 			 * kernel, trap() will set %pc to curthread->t_dtrace_astpc
1971 			 *	<pc + tp->ftt_size>		    8
1984 				fasttrap_sigtrap(p, uthread, pc); // Should be killing target proc
1985 				new_pc = pc;
2045 				*reg = pc + tp->ftt_size;
2053 			 * %rip-relative branch that loads the 64-bit pc value
2062 			*(uint64_t *)&scratch[i] = pc + tp->ftt_size;
2074 				fasttrap_sigtrap(p, uthread, pc);
2075 				new_pc = pc;
2087 			uthread->t_dtrace_pc = pc;
2088 			uthread->t_dtrace_npc = pc + tp->ftt_size;
2124 			fasttrap_return_common(regs, pc, pid, new_pc);
2127 			ASSERT(uthread->t_dtrace_pc == pc);
2164 	user_addr_t pc = uthread->t_dtrace_pc;
2187 	 * will correctly set %pc after we return.
2190 		regs64->isf.rip = pc;
2192 		regs32->eip = pc;
2194 	fasttrap_return_common(regs, pc, p->p_pid, npc);