1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 1995, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <unistd.h>
29 #include <fcntl.h>
30 #include <string.h>
31 #include <errno.h>
32 #include <sys/types.h>
33 #include <sys/signal.h>
34 #include <sys/fault.h>
35 #include <sys/syscall.h>
36 #include <procfs.h>
37 #include <sys/auxv.h>
38 #include <libelf.h>
39 #include <sys/param.h>
40 #include <stdarg.h>
41
42 #include "rdb.h"
43 #include "disasm.h"
44
45 /*
46 * I don't like this global but it's a work-around for the
47 * poor disassemble interface for now.
48 */
49 static struct ps_prochandle *cur_ph;
50
51 /*
52 * This routine converts 'address' into it's closest symbol
53 * representation.
54 *
55 * The following flags are used to effect the output:
56 *
57 * FLG_PAP_SONAME
58 * embed the SONAME in the symbol name
59 * FLG_PAP_NOHEXNAME
60 * if no symbol found return a null string
61 * If this flag is not set return a string displaying
62 * the 'hex' value of address.
63 * FLG_PAP_PLTDECOM
64 * decompose the PLT symbol if possible
65 */
66 char *
print_address_ps(struct ps_prochandle * ph,ulong_t address,unsigned flags)67 print_address_ps(struct ps_prochandle *ph, ulong_t address, unsigned flags)
68 {
69 static char buf[256];
70 GElf_Sym sym;
71 char *str;
72 ulong_t val;
73
74 if (addr_to_sym(ph, address, &sym, &str) == RET_OK) {
75 map_info_t *mip;
76 ulong_t pltbase;
77
78 if (flags & FLG_PAP_SONAME) {
79 /*
80 * Embed SOName in symbol name
81 */
82 if ((mip = addr_to_map(ph, address)) != 0) {
83 (void) strcpy(buf, mip->mi_name);
84 (void) strcat(buf, ":");
85 } else
86 (void) sprintf(buf, "0x%08lx:", address);
87 } else
88 buf[0] = '\0';
89
90 if ((flags & FLG_PAP_PLTDECOM) &&
91 (pltbase = is_plt(ph, address)) != 0) {
92 rd_plt_info_t rp;
93 pstatus_t pstatus;
94
95 if (pread(ph->pp_statusfd, &pstatus,
96 sizeof (pstatus), 0) == -1)
97 perr("pap: reading pstatus");
98
99 if (rd_plt_resolution(ph->pp_rap, address,
100 pstatus.pr_lwp.pr_lwpid, pltbase,
101 &rp) == RD_OK) {
102 if (rp.pi_flags & RD_FLG_PI_PLTBOUND) {
103 GElf_Sym _sym;
104 char *_str;
105
106 if (addr_to_sym(ph, rp.pi_baddr,
107 &_sym, &_str) == RET_OK) {
108 (void) snprintf(buf, 256,
109 "%s0x%lx:plt(%s)",
110 buf, address, _str);
111 return (buf);
112 }
113 }
114 }
115 val = sym.st_value;
116 (void) snprintf(buf, 256, "%s0x%lx:plt(unbound)+0x%lx",
117 buf, address, address - val);
118 return (buf);
119 } else {
120
121 val = sym.st_value;
122
123 if (val < address)
124 (void) snprintf(buf, 256, "%s%s+0x%lx", buf,
125 str, address - val);
126 else
127 (void) snprintf(buf, 256, "%s%s", buf, str);
128 return (buf);
129 }
130 } else {
131 if (flags & FLG_PAP_NOHEXNAME)
132 buf[0] = '\0';
133 else
134 (void) sprintf(buf, "0x%lx", address);
135 return (buf);
136 }
137 }
138
139 char *
print_address(unsigned long address)140 print_address(unsigned long address)
141 {
142 return (print_address_ps(cur_ph, address,
143 FLG_PAP_SONAME| FLG_PAP_PLTDECOM));
144 }
145
146 retc_t
disasm_addr(struct ps_prochandle * ph,ulong_t addr,int num_inst)147 disasm_addr(struct ps_prochandle *ph, ulong_t addr, int num_inst)
148 {
149 ulong_t offset, end;
150 int vers = V8_MODE;
151
152 if (ph->pp_dmodel == PR_MODEL_LP64)
153 vers = V9_MODE | V9_SGI_MODE;
154
155 for (offset = addr, end = addr + num_inst * 4; offset < end;
156 offset += 4) {
157 char *instr_str;
158 unsigned int instr;
159
160 if (ps_pread(ph, offset, (char *)&instr,
161 sizeof (unsigned)) != PS_OK)
162 perror("da: ps_pread");
163
164 cur_ph = ph;
165 instr_str = disassemble(instr, offset, print_address, 0, 0,
166 vers);
167
168 (void) printf("%-30s: %s\n", print_address(offset), instr_str);
169 }
170 return (RET_OK);
171 }
172
173 void
disasm(struct ps_prochandle * ph,int num_inst)174 disasm(struct ps_prochandle *ph, int num_inst)
175 {
176 pstatus_t pstat;
177
178 if (pread(ph->pp_statusfd, &pstat, sizeof (pstat), 0) == -1)
179 perr("disasm: PIOCSTATUS");
180
181 (void) disasm_addr(ph, (ulong_t)pstat.pr_lwp.pr_reg[R_PC], num_inst);
182 }
183