Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame^] | 1 | /* Error handling in libasm. |
| 2 | Copyright (C) 2002, 2004 Red Hat, Inc. |
| 3 | Written by Ulrich Drepper <drepper@redhat.com>, 2002. |
| 4 | |
| 5 | This program is Open Source software; you can redistribute it and/or |
| 6 | modify it under the terms of the Open Software License version 1.0 as |
| 7 | published by the Open Source Initiative. |
| 8 | |
| 9 | You should have received a copy of the Open Software License along |
| 10 | with this program; if not, you may obtain a copy of the Open Software |
| 11 | License version 1.0 from http://www.opensource.org/licenses/osl.php or |
| 12 | by writing the Open Source Initiative c/o Lawrence Rosen, Esq., |
| 13 | 3001 King Ranch Road, Ukiah, CA 95482. */ |
| 14 | |
| 15 | #ifdef HAVE_CONFIG_H |
| 16 | # include <config.h> |
| 17 | #endif |
| 18 | |
| 19 | #include <libintl.h> |
| 20 | #include <stdbool.h> |
| 21 | #include <stdlib.h> |
| 22 | |
| 23 | #include "libasmP.h" |
| 24 | |
| 25 | |
| 26 | /* This is the key for the thread specific memory. */ |
| 27 | static tls_key_t key; |
| 28 | |
| 29 | /* The error number. Used in non-threaded programs. */ |
| 30 | static int global_error; |
| 31 | static bool threaded; |
| 32 | /* We need to initialize the thread-specific data. */ |
| 33 | once_define (static, once); |
| 34 | |
| 35 | /* The initialization and destruction functions. */ |
| 36 | static void init (void); |
| 37 | static void free_key_mem (void *mem); |
| 38 | |
| 39 | |
| 40 | int |
| 41 | asm_errno (void) |
| 42 | { |
| 43 | int result; |
| 44 | |
| 45 | /* If we have not yet initialized the buffer do it now. */ |
| 46 | once_execute (once, init); |
| 47 | |
| 48 | if (threaded) |
| 49 | { |
| 50 | /* We have a key. Use it to get the thread-specific buffer. */ |
| 51 | int *buffer = getspecific (key); |
| 52 | if (buffer == NULL) |
| 53 | { |
| 54 | /* No buffer allocated so far. */ |
| 55 | buffer = (int *) malloc (sizeof (int)); |
| 56 | if (buffer == NULL) |
| 57 | /* No more memory available. We use the static buffer. */ |
| 58 | buffer = &global_error; |
| 59 | |
| 60 | setspecific (key, buffer); |
| 61 | |
| 62 | *buffer = 0; |
| 63 | } |
| 64 | |
| 65 | result = *buffer; |
| 66 | *buffer = ASM_E_NOERROR; |
| 67 | return result; |
| 68 | } |
| 69 | |
| 70 | result = global_error; |
| 71 | global_error = ASM_E_NOERROR; |
| 72 | return result; |
| 73 | } |
| 74 | |
| 75 | |
| 76 | void |
| 77 | __libasm_seterrno (value) |
| 78 | int value; |
| 79 | { |
| 80 | /* If we have not yet initialized the buffer do it now. */ |
| 81 | once_execute (once, init); |
| 82 | |
| 83 | if (threaded) |
| 84 | { |
| 85 | /* We have a key. Use it to get the thread-specific buffer. */ |
| 86 | int *buffer = getspecific (key); |
| 87 | if (buffer == NULL) |
| 88 | { |
| 89 | /* No buffer allocated so far. */ |
| 90 | buffer = malloc (sizeof (int)); |
| 91 | if (buffer == NULL) |
| 92 | /* No more memory available. We use the static buffer. */ |
| 93 | buffer = &global_error; |
| 94 | |
| 95 | setspecific (key, buffer); |
| 96 | } |
| 97 | |
| 98 | *buffer = value; |
| 99 | } |
| 100 | |
| 101 | global_error = value; |
| 102 | } |
| 103 | |
| 104 | |
| 105 | /* Return the appropriate message for the error. */ |
| 106 | static const char *msgs[ASM_E_NUM] = |
| 107 | { |
| 108 | [ASM_E_NOERROR] = N_("no error"), |
| 109 | [ASM_E_NOMEM] = N_("out of memory"), |
| 110 | [ASM_E_CANNOT_CREATE] = N_("cannot create output file"), |
| 111 | [ASM_E_INVALID] = N_("invalid parameter"), |
| 112 | [ASM_E_CANNOT_CHMOD] = N_("cannot change mode of output file"), |
| 113 | [ASM_E_CANNOT_RENAME] = N_("cannot rename output file"), |
| 114 | [ASM_E_DUPLSYM] = N_("duplicate symbol"), |
| 115 | [ASM_E_TYPE] = N_("invalid section type for operation") |
| 116 | }; |
| 117 | |
| 118 | const char * |
| 119 | asm_errmsg (error) |
| 120 | int error; |
| 121 | { |
| 122 | int last_error; |
| 123 | |
| 124 | /* If we have not yet initialized the buffer do it now. */ |
| 125 | once_execute (once, init); |
| 126 | |
| 127 | if ((error == 0 || error == -1) && threaded) |
| 128 | { |
| 129 | /* We have a key. Use it to get the thread-specific buffer. */ |
| 130 | int *buffer = (int *) getspecific (key); |
| 131 | if (buffer == NULL) |
| 132 | { |
| 133 | /* No buffer allocated so far. */ |
| 134 | buffer = (int *) malloc (sizeof (int)); |
| 135 | if (buffer == NULL) |
| 136 | /* No more memory available. We use the static buffer. */ |
| 137 | buffer = &global_error; |
| 138 | |
| 139 | setspecific (key, buffer); |
| 140 | *buffer = 0; |
| 141 | } |
| 142 | |
| 143 | last_error = *buffer; |
| 144 | } |
| 145 | else |
| 146 | last_error = global_error; |
| 147 | |
| 148 | if (error < -1) |
| 149 | return _("Unknown error"); |
| 150 | if (error == 0 && last_error == 0) |
| 151 | /* No error. */ |
| 152 | return NULL; |
| 153 | |
| 154 | if (error != -1) |
| 155 | last_error = error; |
| 156 | |
| 157 | if (last_error == ASM_E_LIBELF) |
| 158 | return elf_errmsg (-1); |
| 159 | |
| 160 | return _(msgs[last_error]); |
| 161 | } |
| 162 | |
| 163 | |
| 164 | /* Free the thread specific data, this is done if a thread terminates. */ |
| 165 | static void |
| 166 | free_key_mem (void *mem) |
| 167 | { |
| 168 | free (mem); |
| 169 | setspecific (key, NULL); |
| 170 | } |
| 171 | |
| 172 | |
| 173 | /* Initialize the key for the global variable. */ |
| 174 | static void |
| 175 | init (void) |
| 176 | { |
| 177 | // XXX Screw you, gcc4, the unused function attribute does not work. |
| 178 | __asm ("" :: "r" (free_key_mem)); |
| 179 | |
| 180 | if (key_create (&key, free_key_mem) == 0) |
| 181 | /* Creating the key succeeded. */ |
| 182 | threaded = true; |
| 183 | } |