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.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/types.h>
31 #ifndef CROSS_DEBUGGER
32 #include <machine/pcb.h>
33 #include <machine/frame.h>
34 #include <machine/armreg.h>
42 #include <gdbthread.h>
45 #include <frame-unwind.h>
51 kgdb_trgt_fetch_registers(int regno __unused)
53 #ifndef CROSS_DEBUGGER
58 kt = kgdb_thr_lookup_tid(ptid_get_pid(inferior_ptid));
61 if (kvm_read(kvm, kt->pcb, &pcb, sizeof(pcb)) != sizeof(pcb)) {
62 warnx("kvm_read: %s", kvm_geterr(kvm));
63 memset(&pcb, 0, sizeof(pcb));
65 for (i = ARM_A1_REGNUM + 8; i <= ARM_SP_REGNUM; i++) {
66 supply_register(i, (char *)&pcb.un_32.pcb32_r8 +
67 (i - (ARM_A1_REGNUM + 8 )) * 4);
69 if (pcb.un_32.pcb32_sp != 0) {
70 for (i = 0; i < 4; i++) {
71 if (kvm_read(kvm, pcb.un_32.pcb32_sp + (i) * 4,
73 warnx("kvm_read: %s", kvm_geterr(kvm));
76 supply_register(ARM_A1_REGNUM + 4 + i, (char *)®);
78 if (kvm_read(kvm, pcb.un_32.pcb32_sp + 4 * 4, ®, 4) != 4)
79 warnx("kvm_read :%s", kvm_geterr(kvm));
81 supply_register(ARM_PC_REGNUM, (char *)®);
87 kgdb_trgt_store_registers(int regno __unused)
89 fprintf_unfiltered(gdb_stderr, "XXX: %s\n", __func__);
93 kgdb_trgt_new_objfile(struct objfile *objfile)
97 #ifndef CROSS_DEBUGGER
98 struct kgdb_frame_cache {
103 static int kgdb_trgt_frame_offset[26] = {
104 offsetof(struct trapframe, tf_r0),
105 offsetof(struct trapframe, tf_r1),
106 offsetof(struct trapframe, tf_r2),
107 offsetof(struct trapframe, tf_r3),
108 offsetof(struct trapframe, tf_r4),
109 offsetof(struct trapframe, tf_r5),
110 offsetof(struct trapframe, tf_r6),
111 offsetof(struct trapframe, tf_r7),
112 offsetof(struct trapframe, tf_r8),
113 offsetof(struct trapframe, tf_r9),
114 offsetof(struct trapframe, tf_r10),
115 offsetof(struct trapframe, tf_r11),
116 offsetof(struct trapframe, tf_r12),
117 offsetof(struct trapframe, tf_svc_sp),
118 offsetof(struct trapframe, tf_svc_lr),
119 offsetof(struct trapframe, tf_pc),
120 -1, -1, -1, -1, -1, -1, -1, -1, -1,
121 offsetof(struct trapframe, tf_spsr)
124 static struct kgdb_frame_cache *
125 kgdb_trgt_frame_cache(struct frame_info *next_frame, void **this_cache)
127 char buf[MAX_REGISTER_SIZE];
128 struct kgdb_frame_cache *cache;
132 cache = FRAME_OBSTACK_ZALLOC(struct kgdb_frame_cache);
134 frame_unwind_register(next_frame, ARM_SP_REGNUM, buf);
135 cache->sp = extract_unsigned_integer(buf,
136 register_size(current_gdbarch, ARM_SP_REGNUM));
137 frame_unwind_register(next_frame, ARM_FP_REGNUM, buf);
138 cache->fp = extract_unsigned_integer(buf,
139 register_size(current_gdbarch, ARM_FP_REGNUM));
147 kgdb_trgt_trapframe_this_id(struct frame_info *next_frame, void **this_cache,
148 struct frame_id *this_id)
150 struct kgdb_frame_cache *cache;
152 cache = kgdb_trgt_frame_cache(next_frame, this_cache);
153 *this_id = frame_id_build(cache->fp, 0);
157 kgdb_trgt_trapframe_prev_register(struct frame_info *next_frame,
158 void **this_cache, int regnum, int *optimizedp, enum lval_type *lvalp,
159 CORE_ADDR *addrp, int *realnump, void *valuep)
161 char dummy_valuep[MAX_REGISTER_SIZE];
162 struct kgdb_frame_cache *cache;
164 int is_undefined = 0;
166 regsz = register_size(current_gdbarch, regnum);
169 valuep = dummy_valuep;
170 memset(valuep, 0, regsz);
176 ofs = (regnum >= 0 && regnum <= ARM_PS_REGNUM)
177 ? kgdb_trgt_frame_offset[regnum] : -1;
181 cache = kgdb_trgt_frame_cache(next_frame, this_cache);
183 if (is_undef && (regnum == ARM_SP_REGNUM || regnum == ARM_PC_REGNUM)) {
184 *addrp = cache->sp + offsetof(struct trapframe, tf_spsr);
185 target_read_memory(*addrp, valuep, regsz);
187 ofs = kgdb_trgt_frame_offset[ARM_SP_REGNUM];
190 *addrp = cache->sp + ofs;
191 *lvalp = lval_memory;
192 target_read_memory(*addrp, valuep, regsz);
195 *addrp = *(unsigned int *)valuep + (regnum == ARM_SP_REGNUM ?
197 target_read_memory(*addrp, valuep, regsz);
202 static const struct frame_unwind kgdb_trgt_trapframe_unwind = {
204 &kgdb_trgt_trapframe_this_id,
205 &kgdb_trgt_trapframe_prev_register
209 const struct frame_unwind *
210 kgdb_trgt_trapframe_sniffer(struct frame_info *next_frame)
212 #ifndef CROSS_DEBUGGER
216 pc = frame_pc_unwind(next_frame);
218 find_pc_partial_function(pc, &pname, NULL, NULL);
223 if (!strcmp(pname, "undefinedinstruction"))
225 if (strcmp(pname, "Laddress_exception_entry") == 0 ||
226 strcmp(pname, "undefined_entry") == 0 ||
227 strcmp(pname, "exception_exit") == 0 ||
228 strcmp(pname, "Laddress_exception_msg") == 0 ||
229 strcmp(pname, "irq_entry") == 0)
230 return (&kgdb_trgt_trapframe_unwind);
231 if (!strcmp(pname, "undefinedinstruction"))