Commit | Line | Data |
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c28c63d8 JB |
1 | /* Main simulator entry points specific to Lattice Mico32. |
2 | Contributed by Jon Beniston <jon@beniston.com> | |
3 | ||
618f726f | 4 | Copyright (C) 2009-2016 Free Software Foundation, Inc. |
c28c63d8 JB |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | #include "sim-main.h" | |
22 | #include "sim-options.h" | |
23 | #include "libiberty.h" | |
24 | #include "bfd.h" | |
25 | ||
26 | #ifdef HAVE_STDLIB_H | |
27 | #include <stdlib.h> | |
28 | #endif | |
c28c63d8 JB |
29 | \f |
30 | /* Cover function of sim_state_free to free the cpu buffers as well. */ | |
31 | ||
32 | static void | |
33 | free_state (SIM_DESC sd) | |
34 | { | |
35 | if (STATE_MODULES (sd) != NULL) | |
36 | sim_module_uninstall (sd); | |
37 | sim_cpu_free_all (sd); | |
38 | sim_state_free (sd); | |
39 | } | |
40 | ||
41 | /* Find memory range used by program. */ | |
42 | ||
43 | static unsigned long | |
44 | find_base (bfd *prog_bfd) | |
45 | { | |
46 | int found; | |
47 | unsigned long base = ~(0UL); | |
48 | asection *s; | |
49 | ||
50 | found = 0; | |
51 | for (s = prog_bfd->sections; s; s = s->next) | |
52 | { | |
53 | if ((strcmp (bfd_get_section_name (prog_bfd, s), ".boot") == 0) | |
54 | || (strcmp (bfd_get_section_name (prog_bfd, s), ".text") == 0) | |
55 | || (strcmp (bfd_get_section_name (prog_bfd, s), ".data") == 0) | |
56 | || (strcmp (bfd_get_section_name (prog_bfd, s), ".bss") == 0)) | |
57 | { | |
58 | if (!found) | |
59 | { | |
60 | base = bfd_get_section_vma (prog_bfd, s); | |
61 | found = 1; | |
62 | } | |
63 | else | |
64 | base = | |
65 | bfd_get_section_vma (prog_bfd, | |
66 | s) < base ? bfd_get_section_vma (prog_bfd, | |
67 | s) : base; | |
68 | } | |
69 | } | |
70 | return base & ~(0xffffUL); | |
71 | } | |
72 | ||
73 | static unsigned long | |
5357150c | 74 | find_limit (SIM_DESC sd) |
c28c63d8 | 75 | { |
5357150c | 76 | bfd_vma addr; |
c28c63d8 | 77 | |
5357150c MF |
78 | addr = trace_sym_value (sd, "_fstack"); |
79 | if (addr == -1) | |
c28c63d8 JB |
80 | return 0; |
81 | ||
5357150c | 82 | return (addr + 65536) & ~(0xffffUL); |
c28c63d8 JB |
83 | } |
84 | ||
c28c63d8 JB |
85 | /* Create an instance of the simulator. */ |
86 | ||
87 | SIM_DESC | |
88 | sim_open (kind, callback, abfd, argv) | |
89 | SIM_OPEN_KIND kind; | |
90 | host_callback *callback; | |
91 | struct bfd *abfd; | |
2e3d4f4d | 92 | char * const *argv; |
c28c63d8 JB |
93 | { |
94 | SIM_DESC sd = sim_state_alloc (kind, callback); | |
95 | char c; | |
96 | int i; | |
97 | unsigned long base, limit; | |
98 | ||
99 | /* The cpu data is kept in a separately allocated chunk of memory. */ | |
100 | if (sim_cpu_alloc_all (sd, 1, cgen_cpu_max_extra_bytes ()) != SIM_RC_OK) | |
101 | { | |
102 | free_state (sd); | |
103 | return 0; | |
104 | } | |
105 | ||
106 | if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK) | |
107 | { | |
108 | free_state (sd); | |
109 | return 0; | |
110 | } | |
c28c63d8 | 111 | |
77cf2ef5 | 112 | /* The parser will print an error message for us, so we silently return. */ |
c28c63d8 JB |
113 | if (sim_parse_args (sd, argv) != SIM_RC_OK) |
114 | { | |
115 | free_state (sd); | |
116 | return 0; | |
117 | } | |
118 | ||
119 | #if 0 | |
120 | /* Allocate a handler for I/O devices | |
121 | if no memory for that range has been allocated by the user. | |
122 | All are allocated in one chunk to keep things from being | |
123 | unnecessarily complicated. */ | |
124 | if (sim_core_read_buffer (sd, NULL, read_map, &c, LM32_DEVICE_ADDR, 1) == 0) | |
125 | sim_core_attach (sd, NULL, 0 /*level */ , | |
126 | access_read_write, 0 /*space ??? */ , | |
127 | LM32_DEVICE_ADDR, LM32_DEVICE_LEN /*nr_bytes */ , | |
128 | 0 /*modulo */ , | |
129 | &lm32_devices, NULL /*buffer */ ); | |
130 | #endif | |
131 | ||
132 | /* check for/establish the reference program image. */ | |
133 | if (sim_analyze_program (sd, | |
134 | (STATE_PROG_ARGV (sd) != NULL | |
135 | ? *STATE_PROG_ARGV (sd) | |
136 | : NULL), abfd) != SIM_RC_OK) | |
137 | { | |
138 | free_state (sd); | |
139 | return 0; | |
140 | } | |
141 | ||
142 | /* Check to see if memory exists at programs start address. */ | |
143 | if (sim_core_read_buffer (sd, NULL, read_map, &c, STATE_START_ADDR (sd), 1) | |
144 | == 0) | |
145 | { | |
146 | if (STATE_PROG_BFD (sd) != NULL) | |
147 | { | |
148 | /* It doesn't, so we should try to allocate enough memory to hold program. */ | |
149 | base = find_base (STATE_PROG_BFD (sd)); | |
5357150c | 150 | limit = find_limit (sd); |
c28c63d8 JB |
151 | if (limit == 0) |
152 | { | |
153 | sim_io_eprintf (sd, | |
154 | "Failed to find symbol _fstack in program. You must specify memory regions with --memory-region.\n"); | |
155 | free_state (sd); | |
156 | return 0; | |
157 | } | |
158 | /*sim_io_printf (sd, "Allocating memory at 0x%x size 0x%x\n", base, limit); */ | |
159 | sim_do_commandf (sd, "memory region 0x%x,0x%x", base, limit); | |
160 | } | |
161 | } | |
162 | ||
163 | /* Establish any remaining configuration options. */ | |
164 | if (sim_config (sd) != SIM_RC_OK) | |
165 | { | |
166 | free_state (sd); | |
167 | return 0; | |
168 | } | |
169 | ||
170 | if (sim_post_argv_init (sd) != SIM_RC_OK) | |
171 | { | |
172 | free_state (sd); | |
173 | return 0; | |
174 | } | |
175 | ||
176 | /* Open a copy of the cpu descriptor table. */ | |
177 | { | |
178 | CGEN_CPU_DESC cd = | |
179 | lm32_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name, | |
180 | CGEN_ENDIAN_BIG); | |
181 | for (i = 0; i < MAX_NR_PROCESSORS; ++i) | |
182 | { | |
183 | SIM_CPU *cpu = STATE_CPU (sd, i); | |
184 | CPU_CPU_DESC (cpu) = cd; | |
185 | CPU_DISASSEMBLER (cpu) = sim_cgen_disassemble_insn; | |
186 | } | |
187 | lm32_cgen_init_dis (cd); | |
188 | } | |
189 | ||
190 | /* Initialize various cgen things not done by common framework. | |
191 | Must be done after lm32_cgen_cpu_open. */ | |
192 | cgen_init (sd); | |
193 | ||
c28c63d8 JB |
194 | return sd; |
195 | } | |
c28c63d8 JB |
196 | \f |
197 | SIM_RC | |
198 | sim_create_inferior (sd, abfd, argv, envp) | |
199 | SIM_DESC sd; | |
200 | struct bfd *abfd; | |
2e3d4f4d MF |
201 | char * const *argv; |
202 | char * const *envp; | |
c28c63d8 JB |
203 | { |
204 | SIM_CPU *current_cpu = STATE_CPU (sd, 0); | |
205 | SIM_ADDR addr; | |
206 | ||
207 | if (abfd != NULL) | |
208 | addr = bfd_get_start_address (abfd); | |
209 | else | |
210 | addr = 0; | |
211 | sim_pc_set (current_cpu, addr); | |
212 | ||
0e967299 MF |
213 | /* Standalone mode (i.e. `run`) will take care of the argv for us in |
214 | sim_open() -> sim_parse_args(). But in debug mode (i.e. 'target sim' | |
215 | with `gdb`), we need to handle it because the user can change the | |
216 | argv on the fly via gdb's 'run'. */ | |
217 | if (STATE_PROG_ARGV (sd) != argv) | |
218 | { | |
219 | freeargv (STATE_PROG_ARGV (sd)); | |
220 | STATE_PROG_ARGV (sd) = dupargv (argv); | |
221 | } | |
c28c63d8 JB |
222 | |
223 | return SIM_RC_OK; | |
224 | } |