2 * Copyright (c) 2004 Marcel Moolenaar
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
26 * $FreeBSD: src/gnu/usr.bin/gdb/kgdb/trgt_amd64.c,v 1.6 2005/09/28 07:40:27 peter Exp $
27 * $DragonFly: src/gnu/usr.bin/gdb/kgdb/trgt_amd64.c,v 1.2 2008/01/31 14:30:52 corecode Exp $
30 #include <sys/cdefs.h>
32 #include <sys/types.h>
33 #include <machine/pcb.h>
34 #include <machine/frame.h>
41 #include <gdbthread.h>
44 #include <frame-unwind.h>
45 #include <amd64-tdep.h>
50 kgdb_trgt_fetch_registers(struct regcache *regcache, int regno)
55 kt = kgdb_thr_lookup_tid(ptid_get_tid(inferior_ptid));
57 regcache_raw_supply(regcache, regno, NULL);
60 if (kvm_read(kvm, kt->pcb, &pcb, sizeof(pcb)) != sizeof(pcb)) {
61 warnx("kvm_read: %s", kvm_geterr(kvm));
62 memset(&pcb, 0, sizeof(pcb));
65 regcache_raw_supply(regcache, AMD64_RBX_REGNUM, (char *)&pcb.pcb_rbx);
66 regcache_raw_supply(regcache, AMD64_RBP_REGNUM, (char *)&pcb.pcb_rbp);
67 regcache_raw_supply(regcache, AMD64_RSP_REGNUM, (char *)&pcb.pcb_rsp);
68 regcache_raw_supply(regcache, AMD64_R8_REGNUM + 4, (char *)&pcb.pcb_r12);
69 regcache_raw_supply(regcache, AMD64_R8_REGNUM + 5, (char *)&pcb.pcb_r13);
70 regcache_raw_supply(regcache, AMD64_R8_REGNUM + 6, (char *)&pcb.pcb_r14);
71 regcache_raw_supply(regcache, AMD64_R15_REGNUM, (char *)&pcb.pcb_r15);
72 regcache_raw_supply(regcache, AMD64_RIP_REGNUM, (char *)&pcb.pcb_rip);
76 kgdb_trgt_store_registers(struct regcache *regcache, int regno __unused)
78 fprintf_unfiltered(gdb_stderr, "XXX: %s\n", __func__);
81 struct kgdb_frame_cache {
86 static int kgdb_trgt_frame_offset[20] = {
87 offsetof(struct trapframe, tf_rax),
88 offsetof(struct trapframe, tf_rbx),
89 offsetof(struct trapframe, tf_rcx),
90 offsetof(struct trapframe, tf_rdx),
91 offsetof(struct trapframe, tf_rsi),
92 offsetof(struct trapframe, tf_rdi),
93 offsetof(struct trapframe, tf_rbp),
94 offsetof(struct trapframe, tf_rsp),
95 offsetof(struct trapframe, tf_r8),
96 offsetof(struct trapframe, tf_r9),
97 offsetof(struct trapframe, tf_r10),
98 offsetof(struct trapframe, tf_r11),
99 offsetof(struct trapframe, tf_r12),
100 offsetof(struct trapframe, tf_r13),
101 offsetof(struct trapframe, tf_r14),
102 offsetof(struct trapframe, tf_r15),
103 offsetof(struct trapframe, tf_rip),
104 offsetof(struct trapframe, tf_rflags),
105 offsetof(struct trapframe, tf_cs),
106 offsetof(struct trapframe, tf_ss)
109 static struct kgdb_frame_cache *
110 kgdb_trgt_frame_cache(struct frame_info *next_frame, void **this_cache)
112 char buf[MAX_REGISTER_SIZE];
113 struct kgdb_frame_cache *cache;
117 cache = FRAME_OBSTACK_ZALLOC(struct kgdb_frame_cache);
119 cache->pc = get_frame_address_in_block(next_frame);
120 frame_unwind_register(next_frame, AMD64_RSP_REGNUM, buf);
121 cache->sp = extract_unsigned_integer(buf,
122 register_size(current_gdbarch, AMD64_RSP_REGNUM));
128 kgdb_trgt_trapframe_this_id(struct frame_info *next_frame, void **this_cache,
129 struct frame_id *this_id)
131 struct kgdb_frame_cache *cache;
133 cache = kgdb_trgt_frame_cache(next_frame, this_cache);
134 *this_id = frame_id_build(cache->sp, cache->pc);
138 kgdb_trgt_trapframe_prev_register(struct frame_info *next_frame,
139 void **this_cache, int regnum, int *optimizedp, enum lval_type *lvalp,
140 CORE_ADDR *addrp, int *realnump, void *valuep)
142 char dummy_valuep[MAX_REGISTER_SIZE];
143 struct kgdb_frame_cache *cache;
146 regsz = register_size(current_gdbarch, regnum);
149 valuep = dummy_valuep;
150 memset(valuep, 0, regsz);
156 cache = kgdb_trgt_frame_cache(next_frame, this_cache);
160 ofs = (regnum >= AMD64_RAX_REGNUM && regnum <= AMD64_EFLAGS_REGNUM + 2)
161 ? kgdb_trgt_frame_offset[regnum] : -1;
165 *addrp = cache->sp + ofs;
166 *lvalp = lval_memory;
167 target_read_memory(*addrp, valuep, regsz);
170 const struct frame_unwind kgdb_trgt_trapframe_unwind = {
172 &kgdb_trgt_trapframe_this_id,
173 &kgdb_trgt_trapframe_prev_register
176 const struct frame_unwind *
177 kgdb_trgt_trapframe_sniffer(struct frame_info *next_frame)
182 pc = frame_pc_unwind(next_frame);
184 return (&kgdb_trgt_trapframe_unwind);
186 find_pc_partial_function(pc, &pname, NULL, NULL);
189 if (strcmp(pname, "calltrap") == 0 ||
190 (pname[0] == 'X' && pname[1] != '_'))
191 return (&kgdb_trgt_trapframe_unwind);
192 /* printf("%s: %lx =%s\n", __func__, pc, pname); */