asm/error.c

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 1996-2018 The NASM Authors - All Rights Reserved
   4  *   See the file AUTHORS included with the NASM distribution for
   5  *   the specific copyright holders.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following
   9  *   conditions are met:
  10  *
  11  *   * Redistributions of source code must retain the above copyright
  12  *     notice, this list of conditions and the following disclaimer.
  13  *   * Redistributions in binary form must reproduce the above
  14  *     copyright notice, this list of conditions and the following
  15  *     disclaimer in the documentation and/or other materials provided
  16  *     with the distribution.
  17  *
  18  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  19  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  20  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  21  *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  22  *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23  *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  25  *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  26  *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  29  *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  30  *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  * ----------------------------------------------------------------------- */
  33
  34 /*
  35  * error.c - error message handling routines for the assembler
  36  */
  37
  38 #include "compiler.h"
  39
  40 #include <stdlib.h>
  41
  42 #include "nasmlib.h"
  43 #include "error.h"
  44
  45 /*
  46  * Description of the suppressible warnings for the command line and
  47  * the [warning] directive.
  48  */
  49 #define on      (WARN_ST_ENABLED)
  50 #define off     0
  51 #define err     (WARN_ST_ENABLED|WARN_ST_ERROR)
  52
  53 const struct warning warnings[WARN_ALL+1] = {
  54     {NULL, NULL, on},   /* must be on - used for unconditional enable */
  55     {"macro-params", "macro calls with wrong parameter count", on},
  56     {"macro-selfref", "cyclic macro references", off},
  57     {"macro-defaults", "macros with more default than optional parameters", on},
  58     {"orphan-labels", "labels alone on lines without trailing `:'", on},
  59     {"number-overflow", "numeric constant does not fit", on},
  60     {"gnu-elf-extensions", "using 8- or 16-bit relocation in ELF32, a GNU extension", off},
  61     {"float-overflow", "floating point overflow", on},
  62     {"float-denorm", "floating point denormal", off},
  63     {"float-underflow", "floating point underflow", off},
  64     {"float-toolong", "too many digits in floating-point number", on},
  65     {"user", "%warning directives", on},
  66     {"lock", "lock prefix on unlockable instructions", on},
  67     {"hle", "invalid hle prefixes", on},
  68     {"bnd", "invalid bnd prefixes", on},
  69     {"zext-reloc", "relocation zero-extended to match output format", on},
  70     {"ptr", "non-NASM keyword used in other assemblers", on},
  71     {"bad-pragma", "empty or malformed %pragma", off},
  72     {"unknown-pragma", "unknown %pragma facility or directive", off},
  73     {"not-my-pragma", "%pragma not applicable to this compilation", off},
  74     {"unknown-warning", "unknown warning in -W/-w or warning directive", off},
  75     {"negative-rep", "regative %rep count", on},
  76     {"phase", "phase error during stabilization", off},
  77     {"label-redef", "label redefined to an identical value", off},
  78     {"label-redef-late", "label (re)defined during code generation", err},
  79
  80     /* THESE ENTRIES SHOULD COME LAST */
  81     {"other", "any warning not specifially mentioned above", on},
  82     {"all", "all possible warnings", off}
  83 };
  84
  85 uint8_t warning_state[WARN_ALL];/* Current state */
  86 uint8_t warning_state_init[WARN_ALL]; /* Command-line state, for reset */
  87
  88 vefunc nasm_verror;    /* Global error handling function */
  89
  90 void nasm_error(int severity, const char *fmt, ...)
  91 {
  92     va_list ap;
  93
  94     va_start(ap, fmt);
  95     nasm_verror(severity, fmt, ap);
  96     va_end(ap);
  97 }
  98
  99 fatal_func nasm_fatal(int flags, const char *fmt, ...)
 100 {
 101     va_list ap;
 102
 103     va_start(ap, fmt);
 104     nasm_verror(flags | ERR_FATAL, fmt, ap);
 105     abort();                    /* We should never get here */
 106 }
 107
 108 fatal_func nasm_panic(int flags, const char *fmt, ...)
 109 {
 110     va_list ap;
 111
 112     va_start(ap, fmt);
 113     nasm_verror(flags | ERR_PANIC, fmt, ap);
 114     abort();                    /* We should never get here */
 115 }
 116
 117 fatal_func nasm_panic_from_macro(const char *file, int line)
 118 {
 119     nasm_panic(ERR_NOFILE, "Internal error at %s:%d\n", file, line);
 120 }
 121
 122 fatal_func nasm_assert_failed(const char *file, int line, const char *msg)
 123 {
 124     nasm_panic(0, "assertion %s failed at %s:%d", msg, file, line);
 125 }
 126
 127 /*
 128  * This is called when processing a -w or -W option, or a warning directive.
 129  * Returns on if if the action was successful.
 130  */
 131 bool set_warning_status(const char *value)
 132 {
 133     enum warn_action { WID_OFF, WID_ON, WID_RESET };
 134     enum warn_action action;
 135     uint8_t mask;
 136     int i;
 137     bool ok = false;
 138
 139     value = nasm_skip_spaces(value);
 140     switch (*value) {
 141     case '-':
 142         action = WID_OFF;
 143         value++;
 144         break;
 145     case '+':
 146         action = WID_ON;
 147         value++;
 148         break;
 149     case '*':
 150         action = WID_RESET;
 151         value++;
 152         break;
 153     case 'N':
 154     case 'n':
 155         if (!nasm_strnicmp(value, "no-", 3)) {
 156             action = WID_OFF;
 157             value += 3;
 158             break;
 159         } else if (!nasm_stricmp(value, "none")) {
 160             action = WID_OFF;
 161             value = NULL;
 162             break;
 163         }
 164         /* else fall through */
 165     default:
 166         action = WID_ON;
 167         break;
 168     }
 169
 170     mask = WARN_ST_ENABLED;
 171
 172     if (value && !nasm_strnicmp(value, "error", 5)) {
 173         switch (value[5]) {
 174         case '=':
 175             mask = WARN_ST_ERROR;
 176             value += 6;
 177             break;
 178         case '\0':
 179             mask = WARN_ST_ERROR;
 180             value = NULL;
 181             break;
 182         default:
 183             /* Just an accidental prefix? */
 184             break;
 185         }
 186     }
 187
 188     if (value && !nasm_stricmp(value, "all"))
 189         value = NULL;
 190
 191     /* This is inefficient, but it shouldn't matter... */
 192     for (i = 1; i < WARN_ALL; i++) {
 193         if (!value || !nasm_stricmp(value, warnings[i].name)) {
 194             ok = true;          /* At least one action taken */
 195             switch (action) {
 196             case WID_OFF:
 197                 warning_state[i] &= ~mask;
 198                 break;
 199             case WID_ON:
 200                 warning_state[i] |= mask;
 201                 break;
 202             case WID_RESET:
 203                 warning_state[i] &= ~mask;
 204                 warning_state[i] |= warning_state_init[i] & mask;
 205                 break;
 206             }
 207         }
 208     }
 209
 210     return ok;
 211 }