diff options
| -rw-r--r-- | arch/sandbox/cpu/os.c | 98 | ||||
| -rw-r--r-- | arch/sandbox/cpu/start.c | 88 | ||||
| -rw-r--r-- | arch/sandbox/cpu/u-boot.lds | 4 | ||||
| -rw-r--r-- | arch/sandbox/include/asm/getopt.h | 71 | ||||
| -rw-r--r-- | arch/sandbox/include/asm/sections.h | 22 | ||||
| -rw-r--r-- | arch/sandbox/include/asm/state.h | 5 | ||||
| -rw-r--r-- | arch/sandbox/include/asm/u-boot-sandbox.h | 1 | ||||
| -rw-r--r-- | arch/sandbox/lib/board.c | 1 | ||||
| -rw-r--r-- | include/os.h | 14 |
9 files changed, 304 insertions, 0 deletions
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c index cb469e051..36637af6c 100644 --- a/arch/sandbox/cpu/os.c +++ b/arch/sandbox/cpu/os.c @@ -21,6 +21,7 @@ #include <errno.h> #include <fcntl.h> +#include <getopt.h> #include <stdlib.h> #include <termios.h> #include <time.h> @@ -31,6 +32,9 @@ #include <sys/types.h> #include <linux/types.h> +#include <asm/getopt.h> +#include <asm/sections.h> +#include <asm/state.h> #include <os.h> /* Operating System Interface */ @@ -155,3 +159,97 @@ u64 os_get_nsec(void) return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000; #endif } + +static char *short_opts; +static struct option *long_opts; + +int os_parse_args(struct sandbox_state *state, int argc, char *argv[]) +{ + struct sb_cmdline_option **sb_opt = __u_boot_sandbox_option_start; + size_t num_options = __u_boot_sandbox_option_count(); + size_t i; + + int hidden_short_opt; + size_t si; + + int c; + + if (short_opts || long_opts) + return 1; + + state->argc = argc; + state->argv = argv; + + /* dynamically construct the arguments to the system getopt_long */ + short_opts = os_malloc(sizeof(*short_opts) * num_options * 2 + 1); + long_opts = os_malloc(sizeof(*long_opts) * num_options); + if (!short_opts || !long_opts) + return 1; + + /* + * getopt_long requires "val" to be unique (since that is what the + * func returns), so generate unique values automatically for flags + * that don't have a short option. pick 0x100 as that is above the + * single byte range (where ASCII/ISO-XXXX-X charsets live). + */ + hidden_short_opt = 0x100; + si = 0; + for (i = 0; i < num_options; ++i) { + long_opts[i].name = sb_opt[i]->flag; + long_opts[i].has_arg = sb_opt[i]->has_arg ? + required_argument : no_argument; + long_opts[i].flag = NULL; + + if (sb_opt[i]->flag_short) { + short_opts[si++] = long_opts[i].val = sb_opt[i]->flag_short; + if (long_opts[i].has_arg == required_argument) + short_opts[si++] = ':'; + } else + long_opts[i].val = sb_opt[i]->flag_short = hidden_short_opt++; + } + short_opts[si] = '\0'; + + /* we need to handle output ourselves since u-boot provides printf */ + opterr = 0; + + /* + * walk all of the options the user gave us on the command line, + * figure out what u-boot option structure they belong to (via + * the unique short val key), and call the appropriate callback. + */ + while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) { + for (i = 0; i < num_options; ++i) { + if (sb_opt[i]->flag_short == c) { + if (sb_opt[i]->callback(state, optarg)) { + state->parse_err = sb_opt[i]->flag; + return 0; + } + break; + } + } + if (i == num_options) { + /* + * store the faulting flag for later display. we have to + * store the flag itself as the getopt parsing itself is + * tricky: need to handle the following flags (assume all + * of the below are unknown): + * -a optopt='a' optind=<next> + * -abbbb optopt='a' optind=<this> + * -aaaaa optopt='a' optind=<this> + * --a optopt=0 optind=<this> + * as you can see, it is impossible to determine the exact + * faulting flag without doing the parsing ourselves, so + * we just report the specific flag that failed. + */ + if (optopt) { + static char parse_err[3] = { '-', 0, '\0', }; + parse_err[1] = optopt; + state->parse_err = parse_err; + } else + state->parse_err = argv[optind - 1]; + break; + } + } + + return 0; +} diff --git a/arch/sandbox/cpu/start.c b/arch/sandbox/cpu/start.c index 4a84486c1..6c3e8eb37 100644 --- a/arch/sandbox/cpu/start.c +++ b/arch/sandbox/cpu/start.c @@ -20,21 +20,109 @@ */ #include <common.h> +#include <asm/getopt.h> +#include <asm/sections.h> #include <asm/state.h> +#include <os.h> + +int sandbox_early_getopt_check(void) +{ + struct sandbox_state *state = state_get_current(); + struct sb_cmdline_option **sb_opt = __u_boot_sandbox_option_start; + size_t num_options = __u_boot_sandbox_option_count(); + size_t i; + int max_arg_len, max_noarg_len; + + /* parse_err will be a string of the faulting option */ + if (!state->parse_err) + return 0; + + if (strcmp(state->parse_err, "help")) { + printf("u-boot: error: failed while parsing option: %s\n" + "\ttry running with --help for more information.\n", + state->parse_err); + os_exit(1); + } + + printf( + "u-boot, a command line test interface to U-Boot\n\n" + "Usage: u-boot [options]\n" + "Options:\n"); + + max_arg_len = 0; + for (i = 0; i < num_options; ++i) + max_arg_len = max(strlen(sb_opt[i]->flag), max_arg_len); + max_noarg_len = max_arg_len + 7; + + for (i = 0; i < num_options; ++i) { + struct sb_cmdline_option *opt = sb_opt[i]; + + /* first output the short flag if it has one */ + if (opt->flag_short >= 0x100) + printf(" "); + else + printf(" -%c, ", opt->flag_short); + + /* then the long flag */ + if (opt->has_arg) + printf("--%-*s", max_noarg_len, opt->flag); + else + printf("--%-*s <arg> ", max_arg_len, opt->flag); + + /* finally the help text */ + printf(" %s\n", opt->help); + } + + os_exit(0); +} + +static int sb_cmdline_cb_help(struct sandbox_state *state, const char *arg) +{ + /* just flag to sandbox_early_getopt_check to show usage */ + return 1; +} +SB_CMDLINE_OPT_SHORT(help, 'h', 0, "Display help"); + int sandbox_main_loop_init(void) { + struct sandbox_state *state = state_get_current(); + + /* Execute command if required */ + if (state->cmd) { + /* TODO: redo this when cmd tidy-up series lands */ +#ifdef CONFIG_SYS_HUSH_PARSER + run_command(state->cmd, 0); +#else + parse_string_outer(state->cmd, FLAG_PARSE_SEMICOLON | + FLAG_EXIT_FROM_LOOP); +#endif + os_exit(state->exit_type); + } + return 0; } +static int sb_cmdline_cb_command(struct sandbox_state *state, const char *arg) +{ + state->cmd = arg; + return 0; +} +SB_CMDLINE_OPT_SHORT(command, 'c', 1, "Execute U-Boot command"); + int main(int argc, char *argv[]) { + struct sandbox_state *state; int err; err = state_init(); if (err) return err; + state = state_get_current(); + if (os_parse_args(state, argc, argv)) + return 1; + /* * Do pre- and post-relocation init, then start up U-Boot. This will * never return. diff --git a/arch/sandbox/cpu/u-boot.lds b/arch/sandbox/cpu/u-boot.lds index 0c56aa779..99601387c 100644 --- a/arch/sandbox/cpu/u-boot.lds +++ b/arch/sandbox/cpu/u-boot.lds @@ -28,6 +28,10 @@ SECTIONS _u_boot_cmd : { *(.u_boot_cmd) } __u_boot_cmd_end = .; + __u_boot_sandbox_option_start = .; + _u_boot_sandbox_getopt : { *(.u_boot_sandbox_getopt) } + __u_boot_sandbox_option_end = .; + __bss_start = .; } diff --git a/arch/sandbox/include/asm/getopt.h b/arch/sandbox/include/asm/getopt.h new file mode 100644 index 000000000..685883cd3 --- /dev/null +++ b/arch/sandbox/include/asm/getopt.h @@ -0,0 +1,71 @@ +/* + * Code for setting up command line flags like `./u-boot --help` + * + * Copyright (c) 2011 The Chromium OS Authors. + * + * Licensed under the GPL-2 or later. + */ + +#ifndef __SANDBOX_GETOPT_H +#define __SANDBOX_GETOPT_H + +struct sandbox_state; + +/* + * Internal structure for storing details about the flag. + * Most people should not have to dig around in this as + * it only gets parsed by the core sandbox code. End + * consumer code should focus on the macros below and + * the callback function. + */ +struct sb_cmdline_option { + /* The long flag name: "help" for "--help" */ + const char *flag; + /* The (optional) short flag name: "h" for "-h" */ + int flag_short; + /* The help string shown to the user when processing --help */ + const char *help; + /* Whether this flag takes an argument */ + int has_arg; + /* Callback into the end consumer code with the option */ + int (*callback)(struct sandbox_state *state, const char *opt); +}; + +/* + * Internal macro to expand the lower macros into the necessary + * magic junk that makes this all work. + */ +#define _SB_CMDLINE_OPT(f, s, ha, h) \ + static struct sb_cmdline_option sb_cmdline_option_##f = { \ + .flag = #f, \ + .flag_short = s, \ + .help = h, \ + .has_arg = ha, \ + .callback = sb_cmdline_cb_##f, \ + }; \ + /* Ppointer to the struct in a special section for the linker script */ \ + static __attribute__((section(".u_boot_sandbox_getopt"), used)) \ + struct sb_cmdline_option *sb_cmdline_option_##f##_ptr = \ + &sb_cmdline_option_##f + +/** + * Macros for end code to declare new command line flags. + * + * @param f The long flag name e.g. help + * @param ha Does the flag have an argument e.g. 0/1 + * @param h The help string displayed when showing --help + * + * This invocation: + * SB_CMDLINE_OPT(foo, 0, "The foo arg"); + * Will create a new flag named "--foo" (no short option) that takes + * no argument. If the user specifies "--foo", then the callback func + * sb_cmdline_cb_foo() will automatically be called. + */ +#define SB_CMDLINE_OPT(f, ha, h) _SB_CMDLINE_OPT(f, 0, ha, h) +/* + * Same as above, but @s is used to specify a short flag e.g. + * SB_CMDLINE_OPT(foo, 'f', 0, "The foo arg"); + */ +#define SB_CMDLINE_OPT_SHORT(f, s, ha, h) _SB_CMDLINE_OPT(f, s, ha, h) + +#endif diff --git a/arch/sandbox/include/asm/sections.h b/arch/sandbox/include/asm/sections.h new file mode 100644 index 000000000..eafce7d8a --- /dev/null +++ b/arch/sandbox/include/asm/sections.h @@ -0,0 +1,22 @@ +/* + * decls for symbols defined in the linker script + * + * Copyright (c) 2012 The Chromium OS Authors. + * + * Licensed under the GPL-2 or later. + */ + +#ifndef __SANDBOX_SECTIONS_H +#define __SANDBOX_SECTIONS_H + +struct sb_cmdline_option; + +extern struct sb_cmdline_option *__u_boot_sandbox_option_start[], + *__u_boot_sandbox_option_end[]; + +static inline size_t __u_boot_sandbox_option_count(void) +{ + return __u_boot_sandbox_option_end - __u_boot_sandbox_option_start; +} + +#endif diff --git a/arch/sandbox/include/asm/state.h b/arch/sandbox/include/asm/state.h index 5b34e9448..2b62b46ea 100644 --- a/arch/sandbox/include/asm/state.h +++ b/arch/sandbox/include/asm/state.h @@ -22,6 +22,8 @@ #ifndef __SANDBOX_STATE_H #define __SANDBOX_STATE_H +#include <config.h> + /* How we exited U-Boot */ enum exit_type_id { STATE_EXIT_NORMAL, @@ -33,6 +35,9 @@ enum exit_type_id { struct sandbox_state { const char *cmd; /* Command to execute */ enum exit_type_id exit_type; /* How we exited U-Boot */ + const char *parse_err; /* Error to report from parsing */ + int argc; /* Program arguments */ + char **argv; }; /** diff --git a/arch/sandbox/include/asm/u-boot-sandbox.h b/arch/sandbox/include/asm/u-boot-sandbox.h index 99e950b80..50bf8c605 100644 --- a/arch/sandbox/include/asm/u-boot-sandbox.h +++ b/arch/sandbox/include/asm/u-boot-sandbox.h @@ -36,6 +36,7 @@ int board_init(void); int dram_init(void); /* start.c */ +int sandbox_early_getopt_check(void); int sandbox_main_loop_init(void); #endif /* _U_BOOT_SANDBOX_H_ */ diff --git a/arch/sandbox/lib/board.c b/arch/sandbox/lib/board.c index 25a8d02fd..306d1ec33 100644 --- a/arch/sandbox/lib/board.c +++ b/arch/sandbox/lib/board.c @@ -134,6 +134,7 @@ init_fnc_t *init_sequence[] = { env_init, /* initialize environment */ serial_init, /* serial communications setup */ console_init_f, /* stage 1 init of console */ + sandbox_early_getopt_check, /* process command line flags (err/help) */ display_banner, /* say that we are here */ #if defined(CONFIG_DISPLAY_CPUINFO) print_cpuinfo, /* display cpu info (and speed) */ diff --git a/include/os.h b/include/os.h index 6b7ee474f..45729c1e4 100644 --- a/include/os.h +++ b/include/os.h @@ -27,6 +27,8 @@ #ifndef __OS_H__ #define __OS_H__ +struct sandbox_state; + /** * Access to the OS read() system call * @@ -122,4 +124,16 @@ void os_usleep(unsigned long usec); */ u64 os_get_nsec(void); +/** + * Parse arguments and update sandbox state. + * + * @param state Sandbox state to update + * @param argc Argument count + * @param argv Argument vector + * @return 0 if ok, and program should continue; + * 1 if ok, but program should stop; + * -1 on error: program should terminate. + */ +int os_parse_args(struct sandbox_state *state, int argc, char *argv[]); + #endif |