gdb: Adjust makefiles for gdb 7.3
[dragonfly.git] / gnu / usr.bin / gdb / kgdb / trgt_x86_64.c
CommitLineData
301e0930
SS
1/*
2 * Copyright (c) 2004 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
f17ea84b 26 * $FreeBSD: src/gnu/usr.bin/gdb/kgdb/trgt_amd64.c,v 1.10 2008/05/01 20:36:48 jhb Exp $
301e0930
SS
27 */
28
29#include <sys/cdefs.h>
30
31#include <sys/types.h>
5f9c1196 32#include <sys/thread.h>
301e0930
SS
33#include <machine/pcb.h>
34#include <machine/frame.h>
35#include <err.h>
36#include <kvm.h>
37#include <string.h>
38
39#include <defs.h>
40#include <target.h>
41#include <gdbthread.h>
42#include <inferior.h>
43#include <regcache.h>
44#include <frame-unwind.h>
45#include <amd64-tdep.h>
46
47#include "kgdb.h"
48
f17ea84b
SS
49static int
50kgdb_trgt_trapframe_sniffer(const struct frame_unwind *self,
51 struct frame_info *next_frame,
52 void **this_prologue_cache);
53
301e0930 54void
f17ea84b 55kgdb_trgt_fetch_registers(struct target_ops *target_ops, struct regcache *regcache, int regno)
301e0930
SS
56{
57 struct kthr *kt;
58 struct pcb pcb;
59
60 kt = kgdb_thr_lookup_tid(ptid_get_tid(inferior_ptid));
48d74c1d
SS
61 if (kt == NULL) {
62 regcache_raw_supply(regcache, regno, NULL);
301e0930 63 return;
48d74c1d 64 }
5f9c1196
MD
65
66 /*
67 * kt->pcb == 0 is a marker for "non-dumping kernel thread".
68 */
69 if (kt->pcb == 0) {
70 uintptr_t regs[7];
71 uintptr_t addr;
72 uintptr_t sp;
73
74 addr = kt->kaddr + offsetof(struct thread, td_sp);
75 kvm_read(kvm, addr, &sp, sizeof(sp));
76 /*
77 * Stack is:
78 * -2 ret
79 * -1 popfq
80 * 0 popq %r15 edi
81 * 1 popq %r14
82 * 2 popq %r13
83 * 3 popq %r12
84 * 4 popq %rbx
85 * 5 popq %rbp
86 * 6 ret
87 */
88 if (kvm_read(kvm, sp + 2 * sizeof(regs[0]), regs, sizeof(regs)) != sizeof(regs)) {
89 warnx("kvm_read: %s", kvm_geterr(kvm));
90 memset(regs, 0, sizeof(regs));
91 }
92 regcache_raw_supply(regcache, AMD64_R8_REGNUM + 7, &regs[0]);
93 regcache_raw_supply(regcache, AMD64_R8_REGNUM + 6, &regs[1]);
94 regcache_raw_supply(regcache, AMD64_R8_REGNUM + 5, &regs[2]);
95 regcache_raw_supply(regcache, AMD64_R8_REGNUM + 4, &regs[3]);
96 regcache_raw_supply(regcache, AMD64_RBX_REGNUM, &regs[4]);
97 regcache_raw_supply(regcache, AMD64_RBP_REGNUM, &regs[5]);
98 regcache_raw_supply(regcache, AMD64_RIP_REGNUM, &regs[6]);
99 sp += 9 * sizeof(regs[0]);
100 regcache_raw_supply(regcache, AMD64_RSP_REGNUM, &sp);
101 return;
102 }
103
301e0930
SS
104 if (kvm_read(kvm, kt->pcb, &pcb, sizeof(pcb)) != sizeof(pcb)) {
105 warnx("kvm_read: %s", kvm_geterr(kvm));
106 memset(&pcb, 0, sizeof(pcb));
107 }
108
48d74c1d
SS
109 regcache_raw_supply(regcache, AMD64_RBX_REGNUM, (char *)&pcb.pcb_rbx);
110 regcache_raw_supply(regcache, AMD64_RBP_REGNUM, (char *)&pcb.pcb_rbp);
111 regcache_raw_supply(regcache, AMD64_RSP_REGNUM, (char *)&pcb.pcb_rsp);
112 regcache_raw_supply(regcache, AMD64_R8_REGNUM + 4, (char *)&pcb.pcb_r12);
113 regcache_raw_supply(regcache, AMD64_R8_REGNUM + 5, (char *)&pcb.pcb_r13);
114 regcache_raw_supply(regcache, AMD64_R8_REGNUM + 6, (char *)&pcb.pcb_r14);
115 regcache_raw_supply(regcache, AMD64_R15_REGNUM, (char *)&pcb.pcb_r15);
116 regcache_raw_supply(regcache, AMD64_RIP_REGNUM, (char *)&pcb.pcb_rip);
301e0930
SS
117}
118
301e0930 119struct kgdb_frame_cache {
71f9f020 120 int frame_type;
301e0930
SS
121 CORE_ADDR pc;
122 CORE_ADDR sp;
123};
124
71f9f020
MD
125#define FT_NORMAL 1
126#define FT_INTRFRAME 2
127/*#define FT_INTRTRAPFRAME 3*/
128#define FT_TIMERFRAME 4
129#define FT_CALLTRAP 5
130
301e0930
SS
131static int kgdb_trgt_frame_offset[20] = {
132 offsetof(struct trapframe, tf_rax),
133 offsetof(struct trapframe, tf_rbx),
134 offsetof(struct trapframe, tf_rcx),
135 offsetof(struct trapframe, tf_rdx),
136 offsetof(struct trapframe, tf_rsi),
137 offsetof(struct trapframe, tf_rdi),
138 offsetof(struct trapframe, tf_rbp),
139 offsetof(struct trapframe, tf_rsp),
140 offsetof(struct trapframe, tf_r8),
141 offsetof(struct trapframe, tf_r9),
142 offsetof(struct trapframe, tf_r10),
143 offsetof(struct trapframe, tf_r11),
144 offsetof(struct trapframe, tf_r12),
145 offsetof(struct trapframe, tf_r13),
146 offsetof(struct trapframe, tf_r14),
147 offsetof(struct trapframe, tf_r15),
148 offsetof(struct trapframe, tf_rip),
149 offsetof(struct trapframe, tf_rflags),
150 offsetof(struct trapframe, tf_cs),
151 offsetof(struct trapframe, tf_ss)
152};
153
154static struct kgdb_frame_cache *
155kgdb_trgt_frame_cache(struct frame_info *next_frame, void **this_cache)
156{
301e0930 157 struct kgdb_frame_cache *cache;
71f9f020 158 char *pname;
301e0930
SS
159
160 cache = *this_cache;
161 if (cache == NULL) {
162 cache = FRAME_OBSTACK_ZALLOC(struct kgdb_frame_cache);
163 *this_cache = cache;
48d74c1d 164 cache->pc = get_frame_address_in_block(next_frame);
71f9f020
MD
165 cache->sp = get_frame_sp(next_frame);
166 find_pc_partial_function(cache->pc, &pname, NULL, NULL);
167
168 if (strcmp(pname, "calltrap") == 0)
169 cache->frame_type = FT_CALLTRAP;
170 else if (pname[0] != 'X')
171 cache->frame_type = FT_NORMAL;
172 else if (strcmp(pname, "Xtimerint") == 0)
173 cache->frame_type = FT_TIMERFRAME;
174 else
175 cache->frame_type = FT_INTRFRAME;
301e0930
SS
176 }
177 return (cache);
178}
179
180static void
181kgdb_trgt_trapframe_this_id(struct frame_info *next_frame, void **this_cache,
182 struct frame_id *this_id)
183{
184 struct kgdb_frame_cache *cache;
185
186 cache = kgdb_trgt_frame_cache(next_frame, this_cache);
187 *this_id = frame_id_build(cache->sp, cache->pc);
188}
189
f17ea84b 190static struct value *
301e0930 191kgdb_trgt_trapframe_prev_register(struct frame_info *next_frame,
f17ea84b 192 void **this_cache, int regnum)
301e0930 193{
f17ea84b 194 CORE_ADDR addrp;
301e0930 195 struct kgdb_frame_cache *cache;
f17ea84b 196 int ofs;
301e0930 197
f17ea84b
SS
198 if (regnum < AMD64_RAX_REGNUM || regnum > AMD64_EFLAGS_REGNUM + 2)
199 return frame_unwind_got_register(next_frame, regnum, regnum);
301e0930 200
f17ea84b 201 ofs = kgdb_trgt_frame_offset[regnum];
301e0930
SS
202
203 cache = kgdb_trgt_frame_cache(next_frame, this_cache);
301e0930 204
71f9f020
MD
205 switch (cache->frame_type) {
206 case FT_NORMAL:
207 break;
208 case FT_INTRFRAME:
209 ofs += 8;
210 break;
211 case FT_TIMERFRAME:
212 break;
213 /*
214 case FT_INTRTRAPFRAME:
215 ofs -= ofs_fix;
216 break;
217 */
218 case FT_CALLTRAP:
219 ofs += 0;
220 break;
221 default:
222 fprintf_unfiltered(gdb_stderr, "Correct FT_XXX frame offsets "
223 "for %d\n", cache->frame_type);
224 break;
225 }
226
f17ea84b
SS
227 addrp = cache->sp + ofs;
228 return frame_unwind_got_memory(next_frame, regnum, addrp);
301e0930
SS
229}
230
0c3d3a6f
JM
231static enum unwind_stop_reason
232kgdb_trgt_trapframe_unwind_reason(struct frame_info *next_frame,
233 void **this_cache)
234{
235 /* XXX marino : populate logic to determine unwind stoppage */
236 return UNWIND_NO_REASON;
237}
238
f17ea84b
SS
239const struct frame_unwind kgdb_trgt_trapframe_unwind = {
240 NORMAL_FRAME,
0c3d3a6f 241 &kgdb_trgt_trapframe_unwind_reason,
f17ea84b
SS
242 &kgdb_trgt_trapframe_this_id,
243 &kgdb_trgt_trapframe_prev_register,
244 .sniffer = kgdb_trgt_trapframe_sniffer
245};
246
247static int
3cdd3f79
MD
248kgdb_trgt_trapframe_sniffer(const struct frame_unwind *self,
249 struct frame_info *next_frame,
250 void **this_prologue_cache)
301e0930
SS
251{
252 char *pname;
253 CORE_ADDR pc;
254
f17ea84b 255 pc = get_frame_address_in_block(next_frame);
301e0930
SS
256 pname = NULL;
257 find_pc_partial_function(pc, &pname, NULL, NULL);
258 if (pname == NULL)
3cdd3f79 259 return (0);
301e0930 260 if (strcmp(pname, "calltrap") == 0 ||
3cdd3f79 261 strcmp(pname, "dblfault_handler") == 0 ||
f17ea84b
SS
262 strcmp(pname, "nmi_calltrap") == 0 ||
263 (pname[0] == 'X' && pname[1] != '_'))
3cdd3f79
MD
264 return (1);
265 return (0);
301e0930 266}