Alex Bennée | f1672e6 | 2019-05-13 14:43:57 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Semihosting configuration |
| 3 | * |
| 4 | * Copyright (c) 2015 Imagination Technologies |
| 5 | * Copyright (c) 2019 Linaro Ltd |
| 6 | * |
| 7 | * This controls the configuration of semihosting for all guest |
| 8 | * targets that support it. Architecture specific handling is handled |
| 9 | * in target/HW/HW-semi.c |
| 10 | * |
| 11 | * Semihosting is sightly strange in that it is also supported by some |
| 12 | * linux-user targets. However in that use case no configuration of |
| 13 | * the outputs and command lines is supported. |
| 14 | * |
| 15 | * The config module is common to all softmmu targets however as vl.c |
| 16 | * needs to link against the helpers. |
| 17 | * |
| 18 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 19 | */ |
| 20 | |
| 21 | #include "qemu/osdep.h" |
| 22 | #include "qemu/option.h" |
| 23 | #include "qemu/config-file.h" |
| 24 | #include "qemu/error-report.h" |
Philippe Mathieu-Daudé | 6b5fe13 | 2021-03-05 13:54:49 +0000 | [diff] [blame^] | 25 | #include "semihosting/semihost.h" |
Alex Bennée | 4e7f903 | 2019-05-14 15:30:14 +0100 | [diff] [blame] | 26 | #include "chardev/char.h" |
Markus Armbruster | d5938f2 | 2019-08-12 07:23:56 +0200 | [diff] [blame] | 27 | #include "sysemu/sysemu.h" |
Alex Bennée | f1672e6 | 2019-05-13 14:43:57 +0100 | [diff] [blame] | 28 | |
| 29 | QemuOptsList qemu_semihosting_config_opts = { |
| 30 | .name = "semihosting-config", |
| 31 | .implied_opt_name = "enable", |
| 32 | .head = QTAILQ_HEAD_INITIALIZER(qemu_semihosting_config_opts.head), |
| 33 | .desc = { |
| 34 | { |
| 35 | .name = "enable", |
| 36 | .type = QEMU_OPT_BOOL, |
| 37 | }, { |
| 38 | .name = "target", |
| 39 | .type = QEMU_OPT_STRING, |
| 40 | }, { |
Alex Bennée | 4e7f903 | 2019-05-14 15:30:14 +0100 | [diff] [blame] | 41 | .name = "chardev", |
| 42 | .type = QEMU_OPT_STRING, |
| 43 | }, { |
Alex Bennée | f1672e6 | 2019-05-13 14:43:57 +0100 | [diff] [blame] | 44 | .name = "arg", |
| 45 | .type = QEMU_OPT_STRING, |
| 46 | }, |
| 47 | { /* end of list */ } |
| 48 | }, |
| 49 | }; |
| 50 | |
| 51 | typedef struct SemihostingConfig { |
| 52 | bool enabled; |
| 53 | SemihostingTarget target; |
Alex Bennée | 4e7f903 | 2019-05-14 15:30:14 +0100 | [diff] [blame] | 54 | Chardev *chardev; |
Alex Bennée | f1672e6 | 2019-05-13 14:43:57 +0100 | [diff] [blame] | 55 | const char **argv; |
| 56 | int argc; |
| 57 | const char *cmdline; /* concatenated argv */ |
| 58 | } SemihostingConfig; |
| 59 | |
| 60 | static SemihostingConfig semihosting; |
Alex Bennée | 4e7f903 | 2019-05-14 15:30:14 +0100 | [diff] [blame] | 61 | static const char *semihost_chardev; |
Alex Bennée | f1672e6 | 2019-05-13 14:43:57 +0100 | [diff] [blame] | 62 | |
| 63 | bool semihosting_enabled(void) |
| 64 | { |
| 65 | return semihosting.enabled; |
| 66 | } |
| 67 | |
| 68 | SemihostingTarget semihosting_get_target(void) |
| 69 | { |
| 70 | return semihosting.target; |
| 71 | } |
| 72 | |
| 73 | const char *semihosting_get_arg(int i) |
| 74 | { |
| 75 | if (i >= semihosting.argc) { |
| 76 | return NULL; |
| 77 | } |
| 78 | return semihosting.argv[i]; |
| 79 | } |
| 80 | |
| 81 | int semihosting_get_argc(void) |
| 82 | { |
| 83 | return semihosting.argc; |
| 84 | } |
| 85 | |
| 86 | const char *semihosting_get_cmdline(void) |
| 87 | { |
| 88 | if (semihosting.cmdline == NULL && semihosting.argc > 0) { |
| 89 | semihosting.cmdline = g_strjoinv(" ", (gchar **)semihosting.argv); |
| 90 | } |
| 91 | return semihosting.cmdline; |
| 92 | } |
| 93 | |
| 94 | static int add_semihosting_arg(void *opaque, |
| 95 | const char *name, const char *val, |
| 96 | Error **errp) |
| 97 | { |
| 98 | SemihostingConfig *s = opaque; |
| 99 | if (strcmp(name, "arg") == 0) { |
| 100 | s->argc++; |
| 101 | /* one extra element as g_strjoinv() expects NULL-terminated array */ |
| 102 | s->argv = g_realloc(s->argv, (s->argc + 1) * sizeof(void *)); |
| 103 | s->argv[s->argc - 1] = val; |
| 104 | s->argv[s->argc] = NULL; |
| 105 | } |
| 106 | return 0; |
| 107 | } |
| 108 | |
| 109 | /* Use strings passed via -kernel/-append to initialize semihosting.argv[] */ |
| 110 | void semihosting_arg_fallback(const char *file, const char *cmd) |
| 111 | { |
| 112 | char *cmd_token; |
| 113 | |
| 114 | /* argv[0] */ |
| 115 | add_semihosting_arg(&semihosting, "arg", file, NULL); |
| 116 | |
| 117 | /* split -append and initialize argv[1..n] */ |
| 118 | cmd_token = strtok(g_strdup(cmd), " "); |
| 119 | while (cmd_token) { |
| 120 | add_semihosting_arg(&semihosting, "arg", cmd_token, NULL); |
| 121 | cmd_token = strtok(NULL, " "); |
| 122 | } |
| 123 | } |
| 124 | |
Alex Bennée | 4e7f903 | 2019-05-14 15:30:14 +0100 | [diff] [blame] | 125 | Chardev *semihosting_get_chardev(void) |
| 126 | { |
| 127 | return semihosting.chardev; |
| 128 | } |
| 129 | |
Alex Bennée | f1672e6 | 2019-05-13 14:43:57 +0100 | [diff] [blame] | 130 | void qemu_semihosting_enable(void) |
| 131 | { |
| 132 | semihosting.enabled = true; |
| 133 | semihosting.target = SEMIHOSTING_TARGET_AUTO; |
| 134 | } |
| 135 | |
| 136 | int qemu_semihosting_config_options(const char *optarg) |
| 137 | { |
| 138 | QemuOptsList *opt_list = qemu_find_opts("semihosting-config"); |
| 139 | QemuOpts *opts = qemu_opts_parse_noisily(opt_list, optarg, false); |
| 140 | |
| 141 | semihosting.enabled = true; |
| 142 | |
| 143 | if (opts != NULL) { |
| 144 | semihosting.enabled = qemu_opt_get_bool(opts, "enable", |
| 145 | true); |
| 146 | const char *target = qemu_opt_get(opts, "target"); |
Alex Bennée | 4e7f903 | 2019-05-14 15:30:14 +0100 | [diff] [blame] | 147 | /* setup of chardev is deferred until they are initialised */ |
| 148 | semihost_chardev = qemu_opt_get(opts, "chardev"); |
Alex Bennée | f1672e6 | 2019-05-13 14:43:57 +0100 | [diff] [blame] | 149 | if (target != NULL) { |
| 150 | if (strcmp("native", target) == 0) { |
| 151 | semihosting.target = SEMIHOSTING_TARGET_NATIVE; |
| 152 | } else if (strcmp("gdb", target) == 0) { |
| 153 | semihosting.target = SEMIHOSTING_TARGET_GDB; |
| 154 | } else if (strcmp("auto", target) == 0) { |
| 155 | semihosting.target = SEMIHOSTING_TARGET_AUTO; |
| 156 | } else { |
| 157 | error_report("unsupported semihosting-config %s", |
| 158 | optarg); |
| 159 | return 1; |
| 160 | } |
| 161 | } else { |
| 162 | semihosting.target = SEMIHOSTING_TARGET_AUTO; |
| 163 | } |
| 164 | /* Set semihosting argument count and vector */ |
| 165 | qemu_opt_foreach(opts, add_semihosting_arg, |
| 166 | &semihosting, NULL); |
| 167 | } else { |
| 168 | error_report("unsupported semihosting-config %s", optarg); |
| 169 | return 1; |
| 170 | } |
| 171 | |
| 172 | return 0; |
| 173 | } |
| 174 | |
Alex Bennée | 4e7f903 | 2019-05-14 15:30:14 +0100 | [diff] [blame] | 175 | void qemu_semihosting_connect_chardevs(void) |
| 176 | { |
| 177 | /* We had to defer this until chardevs were created */ |
| 178 | if (semihost_chardev) { |
| 179 | Chardev *chr = qemu_chr_find(semihost_chardev); |
| 180 | if (chr == NULL) { |
| 181 | error_report("semihosting chardev '%s' not found", |
| 182 | semihost_chardev); |
| 183 | exit(1); |
| 184 | } |
| 185 | semihosting.chardev = chr; |
| 186 | } |
| 187 | } |