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c28c63d8 JB |
1 | /* Main simulator entry points specific to Lattice Mico32. |
2 | Contributed by Jon Beniston <jon@beniston.com> | |
3 | ||
3666a048 | 4 | Copyright (C) 2009-2021 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 | ||
6df01ab8 MF |
21 | /* This must come before any other includes. */ |
22 | #include "defs.h" | |
23 | ||
c28c63d8 JB |
24 | #include "sim-main.h" |
25 | #include "sim-options.h" | |
26 | #include "libiberty.h" | |
27 | #include "bfd.h" | |
28 | ||
c28c63d8 | 29 | #include <stdlib.h> |
c28c63d8 JB |
30 | \f |
31 | /* Cover function of sim_state_free to free the cpu buffers as well. */ | |
32 | ||
33 | static void | |
34 | free_state (SIM_DESC sd) | |
35 | { | |
36 | if (STATE_MODULES (sd) != NULL) | |
37 | sim_module_uninstall (sd); | |
38 | sim_cpu_free_all (sd); | |
39 | sim_state_free (sd); | |
40 | } | |
41 | ||
42 | /* Find memory range used by program. */ | |
43 | ||
44 | static unsigned long | |
45 | find_base (bfd *prog_bfd) | |
46 | { | |
47 | int found; | |
48 | unsigned long base = ~(0UL); | |
49 | asection *s; | |
50 | ||
51 | found = 0; | |
52 | for (s = prog_bfd->sections; s; s = s->next) | |
53 | { | |
fd361982 AM |
54 | if ((strcmp (bfd_section_name (s), ".boot") == 0) |
55 | || (strcmp (bfd_section_name (s), ".text") == 0) | |
56 | || (strcmp (bfd_section_name (s), ".data") == 0) | |
57 | || (strcmp (bfd_section_name (s), ".bss") == 0)) | |
c28c63d8 JB |
58 | { |
59 | if (!found) | |
60 | { | |
fd361982 | 61 | base = bfd_section_vma (s); |
c28c63d8 JB |
62 | found = 1; |
63 | } | |
64 | else | |
fd361982 | 65 | base = bfd_section_vma (s) < base ? bfd_section_vma (s) : base; |
c28c63d8 JB |
66 | } |
67 | } | |
68 | return base & ~(0xffffUL); | |
69 | } | |
70 | ||
71 | static unsigned long | |
5357150c | 72 | find_limit (SIM_DESC sd) |
c28c63d8 | 73 | { |
5357150c | 74 | bfd_vma addr; |
c28c63d8 | 75 | |
5357150c MF |
76 | addr = trace_sym_value (sd, "_fstack"); |
77 | if (addr == -1) | |
c28c63d8 JB |
78 | return 0; |
79 | ||
5357150c | 80 | return (addr + 65536) & ~(0xffffUL); |
c28c63d8 JB |
81 | } |
82 | ||
c28c63d8 JB |
83 | /* Create an instance of the simulator. */ |
84 | ||
85 | SIM_DESC | |
81e6e8ae TT |
86 | sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd, |
87 | char * const *argv) | |
c28c63d8 JB |
88 | { |
89 | SIM_DESC sd = sim_state_alloc (kind, callback); | |
90 | char c; | |
91 | int i; | |
92 | unsigned long base, limit; | |
93 | ||
ba307cdd MF |
94 | /* Set default options before parsing user options. */ |
95 | current_alignment = STRICT_ALIGNMENT; | |
f9a4d543 | 96 | current_target_byte_order = BFD_ENDIAN_BIG; |
ba307cdd | 97 | |
c28c63d8 | 98 | /* The cpu data is kept in a separately allocated chunk of memory. */ |
d5a71b11 | 99 | if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK) |
c28c63d8 JB |
100 | { |
101 | free_state (sd); | |
102 | return 0; | |
103 | } | |
104 | ||
105 | if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK) | |
106 | { | |
107 | free_state (sd); | |
108 | return 0; | |
109 | } | |
c28c63d8 | 110 | |
77cf2ef5 | 111 | /* The parser will print an error message for us, so we silently return. */ |
c28c63d8 JB |
112 | if (sim_parse_args (sd, argv) != SIM_RC_OK) |
113 | { | |
114 | free_state (sd); | |
115 | return 0; | |
116 | } | |
117 | ||
118 | #if 0 | |
119 | /* Allocate a handler for I/O devices | |
120 | if no memory for that range has been allocated by the user. | |
121 | All are allocated in one chunk to keep things from being | |
122 | unnecessarily complicated. */ | |
123 | if (sim_core_read_buffer (sd, NULL, read_map, &c, LM32_DEVICE_ADDR, 1) == 0) | |
124 | sim_core_attach (sd, NULL, 0 /*level */ , | |
125 | access_read_write, 0 /*space ??? */ , | |
126 | LM32_DEVICE_ADDR, LM32_DEVICE_LEN /*nr_bytes */ , | |
127 | 0 /*modulo */ , | |
128 | &lm32_devices, NULL /*buffer */ ); | |
129 | #endif | |
130 | ||
131 | /* check for/establish the reference program image. */ | |
132 | if (sim_analyze_program (sd, | |
133 | (STATE_PROG_ARGV (sd) != NULL | |
134 | ? *STATE_PROG_ARGV (sd) | |
135 | : NULL), abfd) != SIM_RC_OK) | |
136 | { | |
137 | free_state (sd); | |
138 | return 0; | |
139 | } | |
140 | ||
141 | /* Check to see if memory exists at programs start address. */ | |
142 | if (sim_core_read_buffer (sd, NULL, read_map, &c, STATE_START_ADDR (sd), 1) | |
143 | == 0) | |
144 | { | |
145 | if (STATE_PROG_BFD (sd) != NULL) | |
146 | { | |
147 | /* It doesn't, so we should try to allocate enough memory to hold program. */ | |
148 | base = find_base (STATE_PROG_BFD (sd)); | |
5357150c | 149 | limit = find_limit (sd); |
c28c63d8 JB |
150 | if (limit == 0) |
151 | { | |
152 | sim_io_eprintf (sd, | |
153 | "Failed to find symbol _fstack in program. You must specify memory regions with --memory-region.\n"); | |
154 | free_state (sd); | |
155 | return 0; | |
156 | } | |
157 | /*sim_io_printf (sd, "Allocating memory at 0x%x size 0x%x\n", base, limit); */ | |
158 | sim_do_commandf (sd, "memory region 0x%x,0x%x", base, limit); | |
159 | } | |
160 | } | |
161 | ||
162 | /* Establish any remaining configuration options. */ | |
163 | if (sim_config (sd) != SIM_RC_OK) | |
164 | { | |
165 | free_state (sd); | |
166 | return 0; | |
167 | } | |
168 | ||
169 | if (sim_post_argv_init (sd) != SIM_RC_OK) | |
170 | { | |
171 | free_state (sd); | |
172 | return 0; | |
173 | } | |
174 | ||
175 | /* Open a copy of the cpu descriptor table. */ | |
176 | { | |
177 | CGEN_CPU_DESC cd = | |
178 | lm32_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name, | |
179 | CGEN_ENDIAN_BIG); | |
180 | for (i = 0; i < MAX_NR_PROCESSORS; ++i) | |
181 | { | |
182 | SIM_CPU *cpu = STATE_CPU (sd, i); | |
183 | CPU_CPU_DESC (cpu) = cd; | |
184 | CPU_DISASSEMBLER (cpu) = sim_cgen_disassemble_insn; | |
185 | } | |
186 | lm32_cgen_init_dis (cd); | |
187 | } | |
188 | ||
c28c63d8 JB |
189 | return sd; |
190 | } | |
c28c63d8 JB |
191 | \f |
192 | SIM_RC | |
81e6e8ae TT |
193 | sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char * const *argv, |
194 | char * const *envp) | |
c28c63d8 JB |
195 | { |
196 | SIM_CPU *current_cpu = STATE_CPU (sd, 0); | |
197 | SIM_ADDR addr; | |
198 | ||
199 | if (abfd != NULL) | |
200 | addr = bfd_get_start_address (abfd); | |
201 | else | |
202 | addr = 0; | |
203 | sim_pc_set (current_cpu, addr); | |
204 | ||
0e967299 MF |
205 | /* Standalone mode (i.e. `run`) will take care of the argv for us in |
206 | sim_open() -> sim_parse_args(). But in debug mode (i.e. 'target sim' | |
207 | with `gdb`), we need to handle it because the user can change the | |
208 | argv on the fly via gdb's 'run'. */ | |
209 | if (STATE_PROG_ARGV (sd) != argv) | |
210 | { | |
211 | freeargv (STATE_PROG_ARGV (sd)); | |
212 | STATE_PROG_ARGV (sd) = dupargv (argv); | |
213 | } | |
c28c63d8 JB |
214 | |
215 | return SIM_RC_OK; | |
216 | } |