asm/error.c

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 1996-2017 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 const struct warning warnings[ERR_WARN_ALL+1] = {
  50     {"other", "any warning not specifially mentioned below", true},
  51     {"macro-params", "macro calls with wrong parameter count", true},
  52     {"macro-selfref", "cyclic macro references", false},
  53     {"macro-defaults", "macros with more default than optional parameters", true},
  54     {"orphan-labels", "labels alone on lines without trailing `:'", true},
  55     {"number-overflow", "numeric constant does not fit", true},
  56     {"gnu-elf-extensions", "using 8- or 16-bit relocation in ELF32, a GNU extension", false},
  57     {"float-overflow", "floating point overflow", true},
  58     {"float-denorm", "floating point denormal", false},
  59     {"float-underflow", "floating point underflow", false},
  60     {"float-toolong", "too many digits in floating-point number", true},
  61     {"user", "%warning directives", true},
  62     {"lock", "lock prefix on unlockable instructions", true},
  63     {"hle", "invalid hle prefixes", true},
  64     {"bnd", "invalid bnd prefixes", true},
  65     {"zext-reloc", "relocation zero-extended to match output format", true},
  66     {"ptr", "non-NASM keyword used in other assemblers", true},
  67     {"bad-pragma", "empty or malformed %pragma", false},
  68     {"unknown-pragma", "unknown %pragma facility or directive", false},
  69     {"not-my-pragma", "%pragma not applicable to this compilation", false},
  70     {"unknown-warning", "unknown warning in -W/-w or warning directive", false},
  71
  72     /* THIS ENTRY MUST COME LAST */
  73     {"all", "all possible warnings", false}
  74 };
  75
  76 uint8_t warning_state[ERR_WARN_ALL];/* Current state */
  77 uint8_t warning_state_init[ERR_WARN_ALL]; /* Command-line state, for reset */
  78
  79 vefunc nasm_verror;    /* Global error handling function */
  80
  81 void nasm_error(int severity, const char *fmt, ...)
  82 {
  83     va_list ap;
  84
  85     va_start(ap, fmt);
  86     nasm_verror(severity, fmt, ap);
  87     va_end(ap);
  88 }
  89
  90 no_return nasm_fatal(int flags, const char *fmt, ...)
  91 {
  92     va_list ap;
  93
  94     va_start(ap, fmt);
  95     nasm_verror(flags | ERR_FATAL, fmt, ap);
  96     abort();                    /* We should never get here */
  97 }
  98
  99 no_return nasm_panic(int flags, const char *fmt, ...)
 100 {
 101     va_list ap;
 102
 103     va_start(ap, fmt);
 104     nasm_verror(flags | ERR_PANIC, fmt, ap);
 105     abort();                    /* We should never get here */
 106 }
 107
 108 no_return nasm_panic_from_macro(const char *file, int line)
 109 {
 110     nasm_panic(ERR_NOFILE, "Internal error at %s:%d\n", file, line);
 111 }
 112
 113 no_return nasm_assert_failed(const char *file, int line, const char *msg)
 114 {
 115     nasm_panic(0, "assertion %s failed at %s:%d", msg, file, line);
 116 }
 117
 118 /*
 119  * This is called when processing a -w or -W option, or a warning directive.
 120  * Returns true if if the action was successful.
 121  */
 122 bool set_warning_status(const char *value)
 123 {
 124     enum warn_action { WID_OFF, WID_ON, WID_RESET };
 125     enum warn_action action;
 126     uint8_t mask;
 127     int i;
 128     bool ok = false;
 129
 130     value = nasm_skip_spaces(value);
 131     switch (*value) {
 132     case '-':
 133         action = WID_OFF;
 134         value++;
 135         break;
 136     case '+':
 137         action = WID_ON;
 138         value++;
 139         break;
 140     case '*':
 141         action = WID_RESET;
 142         value++;
 143         break;
 144     case 'N':
 145     case 'n':
 146         if (!nasm_strnicmp(value, "no-", 3)) {
 147             action = WID_OFF;
 148             value += 3;
 149             break;
 150         } else if (!nasm_stricmp(value, "none")) {
 151             action = WID_OFF;
 152             value = NULL;
 153             break;
 154         }
 155         /* else fall through */
 156     default:
 157         action = WID_ON;
 158         break;
 159     }
 160
 161     mask = WARN_ST_ENABLED;
 162
 163     if (value && !nasm_strnicmp(value, "error", 5)) {
 164         switch (value[5]) {
 165         case '=':
 166             mask = WARN_ST_ERROR;
 167             value += 6;
 168             break;
 169         case '\0':
 170             mask = WARN_ST_ERROR;
 171             value = NULL;
 172             break;
 173         default:
 174             /* Just an accidental prefix? */
 175             break;
 176         }
 177     }
 178
 179     if (value && !nasm_stricmp(value, "all"))
 180         value = NULL;
 181
 182     /* This is inefficient, but it shouldn't matter... */
 183     for (i = 0; i < ERR_WARN_ALL; i++) {
 184         if (!value || !nasm_stricmp(value, warnings[i].name)) {
 185             ok = true;          /* At least one action taken */
 186             switch (action) {
 187             case WID_OFF:
 188                 warning_state[i] &= ~mask;
 189                 break;
 190             case WID_ON:
 191                 warning_state[i] |= mask;
 192                 break;
 193             case WID_RESET:
 194                 warning_state[i] &= ~mask;
 195                 warning_state[i] |= warning_state_init[i] & mask;
 196                 break;
 197             }
 198         }
 199     }
 200
 201     return ok;
 202 }