| /* Standard argp argument parsers for tools using libdwfl. |
| Copyright (C) 2005 Red Hat, Inc. |
| |
| This program is Open Source software; you can redistribute it and/or |
| modify it under the terms of the Open Software License version 1.0 as |
| published by the Open Source Initiative. |
| |
| You should have received a copy of the Open Software License along |
| with this program; if not, you may obtain a copy of the Open Software |
| License version 1.0 from http://www.opensource.org/licenses/osl.php or |
| by writing the Open Source Initiative c/o Lawrence Rosen, Esq., |
| 3001 King Ranch Road, Ukiah, CA 95482. */ |
| |
| #include "libdwflP.h" |
| #include <argp.h> |
| #include <stdlib.h> |
| #include <assert.h> |
| #include <libintl.h> |
| |
| /* gettext helper macros. */ |
| #define _(Str) dgettext ("elfutils", Str) |
| |
| |
| #define OPT_DEBUGINFO 0x100 |
| |
| static const struct argp_option options[] = |
| { |
| { NULL, 0, NULL, 0, N_("Input Selection:"), 0 }, |
| { "executable", 'e', "FILE", 0, N_("Find addresses in FILE"), 0 }, |
| { "pid", 'p', "PID", 0, |
| N_("Find addresses in files mapped into process PID"), 0 }, |
| { "kernel", 'k', NULL, 0, N_("Find addresses in the running kernel"), 0 }, |
| { "debuginfo-path", OPT_DEBUGINFO, "PATH", 0, |
| N_("Search path for separate debuginfo files"), 0 }, |
| { NULL, 0, NULL, 0, NULL, 0 } |
| }; |
| |
| static char *debuginfo_path; |
| |
| static const Dwfl_Callbacks proc_callbacks = |
| { |
| .find_debuginfo = INTUSE(dwfl_standard_find_debuginfo), |
| .debuginfo_path = &debuginfo_path, |
| |
| .find_elf = INTUSE(dwfl_linux_proc_find_elf), |
| }; |
| |
| static const Dwfl_Callbacks kernel_callbacks = |
| { |
| .find_debuginfo = INTUSE(dwfl_standard_find_debuginfo), |
| .debuginfo_path = &debuginfo_path, |
| |
| .find_elf = INTUSE(dwfl_linux_kernel_find_elf), |
| .section_address = INTUSE(dwfl_linux_kernel_module_section_address), |
| }; |
| |
| static error_t |
| parse_opt (int key, char *arg, struct argp_state *state) |
| { |
| inline void failure (int errnum, const char *msg) |
| { |
| if (errnum == -1) |
| argp_failure (state, EXIT_FAILURE, 0, "%s: %s", |
| msg, INTUSE(dwfl_errmsg) (-1)); |
| else |
| argp_failure (state, EXIT_FAILURE, errnum, "%s", msg); |
| } |
| inline error_t fail (int errnum, const char *msg) |
| { |
| failure (errnum, msg); |
| return errnum == -1 ? EIO : errnum; |
| } |
| |
| switch (key) |
| { |
| case OPT_DEBUGINFO: |
| debuginfo_path = arg; |
| break; |
| |
| case 'e': |
| if (state->hook == NULL) |
| { |
| Dwfl *dwfl = INTUSE(dwfl_begin) (&proc_callbacks); |
| if (INTUSE(dwfl_report_elf) (dwfl, "", arg, -1, 0) == NULL) |
| return fail (-1, arg); |
| state->hook = dwfl; |
| } |
| else |
| { |
| toomany: |
| argp_error (state, "%s", _("only one -e, -p, or -k option allowed")); |
| return EINVAL; |
| } |
| break; |
| |
| case 'p': |
| if (state->hook == NULL) |
| { |
| Dwfl *dwfl = INTUSE(dwfl_begin) (&proc_callbacks); |
| int result = INTUSE(dwfl_linux_proc_report) (dwfl, atoi (arg)); |
| if (result != 0) |
| return fail (result, arg); |
| state->hook = dwfl; |
| } |
| else |
| goto toomany; |
| break; |
| |
| case 'k': |
| if (state->hook == NULL) |
| { |
| Dwfl *dwfl = INTUSE(dwfl_begin) (&kernel_callbacks); |
| int result = INTUSE(dwfl_linux_kernel_report_kernel) (dwfl); |
| if (result != 0) |
| return fail (result, _("cannot load kernel symbols")); |
| result = INTUSE(dwfl_linux_kernel_report_modules) (dwfl); |
| if (result != 0) |
| /* Non-fatal to have no modules since we do have the kernel. */ |
| failure (result, _("cannot find kernel modules")); |
| state->hook = dwfl; |
| } |
| else |
| goto toomany; |
| break; |
| |
| case ARGP_KEY_SUCCESS: |
| { |
| Dwfl *dwfl = state->hook; |
| |
| if (dwfl == NULL) |
| { |
| /* Default if no -e, -p, or -k, is "-e a.out". */ |
| arg = "a.out"; |
| dwfl = INTUSE(dwfl_begin) (&proc_callbacks); |
| if (INTUSE(dwfl_report_elf) (dwfl, "", arg, -1, 0) == NULL) |
| return fail (-1, arg); |
| state->hook = dwfl; |
| } |
| |
| /* One of the three flavors has done dwfl_begin and some reporting |
| if we got here. Tie up the Dwfl and return it to the caller of |
| argp_parse. */ |
| |
| int result = INTUSE(dwfl_report_end) (dwfl, NULL, NULL); |
| assert (result == 0); |
| |
| *(Dwfl **) state->input = dwfl; |
| } |
| break; |
| |
| default: |
| return ARGP_ERR_UNKNOWN; |
| } |
| return 0; |
| } |
| |
| static const struct argp libdwfl_argp = |
| { .options = options, .parser = parse_opt }; |
| |
| const struct argp * |
| dwfl_standard_argp (void) |
| { |
| return &libdwfl_argp; |
| } |